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  • How to know whether to create a general system or to hack a solution

    - by Andy K
    I'm new to coding , learning it since last year actually. One of my worst habits is the following: Often I'm trying to create a solution that is too big , too complex and doesn't achieve what needs to be achieved, when a hacky kludge can make the fit. One last example was the following (see paste bin link below) http://pastebin.com/WzR3zsLn After explaining my issue, one nice person at stackoverflow came with this solution instead http://stackoverflow.com/questions/25304170/update-a-field-by-removing-quarter-or-removing-month When should I keep my code simple and when should I create a 'big', general solution? I feel stupid sometimes for building something so big, so awkward, just to solve a simple problem. It did not occur to me that there would be an easier solution. Any tips are welcomed. Best

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  • A Taxonomy of Numerical Methods v1

    - by JoshReuben
    Numerical Analysis – When, What, (but not how) Once you understand the Math & know C++, Numerical Methods are basically blocks of iterative & conditional math code. I found the real trick was seeing the forest for the trees – knowing which method to use for which situation. Its pretty easy to get lost in the details – so I’ve tried to organize these methods in a way that I can quickly look this up. I’ve included links to detailed explanations and to C++ code examples. I’ve tried to classify Numerical methods in the following broad categories: Solving Systems of Linear Equations Solving Non-Linear Equations Iteratively Interpolation Curve Fitting Optimization Numerical Differentiation & Integration Solving ODEs Boundary Problems Solving EigenValue problems Enjoy – I did ! Solving Systems of Linear Equations Overview Solve sets of algebraic equations with x unknowns The set is commonly in matrix form Gauss-Jordan Elimination http://en.wikipedia.org/wiki/Gauss%E2%80%93Jordan_elimination C++: http://www.codekeep.net/snippets/623f1923-e03c-4636-8c92-c9dc7aa0d3c0.aspx Produces solution of the equations & the coefficient matrix Efficient, stable 2 steps: · Forward Elimination – matrix decomposition: reduce set to triangular form (0s below the diagonal) or row echelon form. If degenerate, then there is no solution · Backward Elimination –write the original matrix as the product of ints inverse matrix & its reduced row-echelon matrix à reduce set to row canonical form & use back-substitution to find the solution to the set Elementary ops for matrix decomposition: · Row multiplication · Row switching · Add multiples of rows to other rows Use pivoting to ensure rows are ordered for achieving triangular form LU Decomposition http://en.wikipedia.org/wiki/LU_decomposition C++: http://ganeshtiwaridotcomdotnp.blogspot.co.il/2009/12/c-c-code-lu-decomposition-for-solving.html Represent the matrix as a product of lower & upper triangular matrices A modified version of GJ Elimination Advantage – can easily apply forward & backward elimination to solve triangular matrices Techniques: · Doolittle Method – sets the L matrix diagonal to unity · Crout Method - sets the U matrix diagonal to unity Note: both the L & U matrices share the same unity diagonal & can be stored compactly in the same matrix Gauss-Seidel Iteration http://en.wikipedia.org/wiki/Gauss%E2%80%93Seidel_method C++: http://www.nr.com/forum/showthread.php?t=722 Transform the linear set of equations into a single equation & then use numerical integration (as integration formulas have Sums, it is implemented iteratively). an optimization of Gauss-Jacobi: 1.5 times faster, requires 0.25 iterations to achieve the same tolerance Solving Non-Linear Equations Iteratively find roots of polynomials – there may be 0, 1 or n solutions for an n order polynomial use iterative techniques Iterative methods · used when there are no known analytical techniques · Requires set functions to be continuous & differentiable · Requires an initial seed value – choice is critical to convergence à conduct multiple runs with different starting points & then select best result · Systematic - iterate until diminishing returns, tolerance or max iteration conditions are met · bracketing techniques will always yield convergent solutions, non-bracketing methods may fail to converge Incremental method if a nonlinear function has opposite signs at 2 ends of a small interval x1 & x2, then there is likely to be a solution in their interval – solutions are detected by evaluating a function over interval steps, for a change in sign, adjusting the step size dynamically. Limitations – can miss closely spaced solutions in large intervals, cannot detect degenerate (coinciding) solutions, limited to functions that cross the x-axis, gives false positives for singularities Fixed point method http://en.wikipedia.org/wiki/Fixed-point_iteration C++: http://books.google.co.il/books?id=weYj75E_t6MC&pg=PA79&lpg=PA79&dq=fixed+point+method++c%2B%2B&source=bl&ots=LQ-5P_taoC&sig=lENUUIYBK53tZtTwNfHLy5PEWDk&hl=en&sa=X&ei=wezDUPW1J5DptQaMsIHQCw&redir_esc=y#v=onepage&q=fixed%20point%20method%20%20c%2B%2B&f=false Algebraically rearrange a solution to isolate a variable then apply incremental method Bisection method http://en.wikipedia.org/wiki/Bisection_method C++: http://numericalcomputing.wordpress.com/category/algorithms/ Bracketed - Select an initial interval, keep bisecting it ad midpoint into sub-intervals and then apply incremental method on smaller & smaller intervals – zoom in Adv: unaffected by function gradient à reliable Disadv: slow convergence False Position Method http://en.wikipedia.org/wiki/False_position_method C++: http://www.dreamincode.net/forums/topic/126100-bisection-and-false-position-methods/ Bracketed - Select an initial interval , & use the relative value of function at interval end points to select next sub-intervals (estimate how far between the end points the solution might be & subdivide based on this) Newton-Raphson method http://en.wikipedia.org/wiki/Newton's_method C++: http://www-users.cselabs.umn.edu/classes/Summer-2012/csci1113/index.php?page=./newt3 Also known as Newton's method Convenient, efficient Not bracketed – only a single initial guess is required to start iteration – requires an analytical expression for the first derivative of the function as input. Evaluates the function & its derivative at each step. Can be extended to the Newton MutiRoot method for solving multiple roots Can be easily applied to an of n-coupled set of non-linear equations – conduct a Taylor Series expansion of a function, dropping terms of order n, rewrite as a Jacobian matrix of PDs & convert to simultaneous linear equations !!! Secant Method http://en.wikipedia.org/wiki/Secant_method C++: http://forum.vcoderz.com/showthread.php?p=205230 Unlike N-R, can estimate first derivative from an initial interval (does not require root to be bracketed) instead of inputting it Since derivative is approximated, may converge slower. Is fast in practice as it does not have to evaluate the derivative at each step. Similar implementation to False Positive method Birge-Vieta Method http://mat.iitm.ac.in/home/sryedida/public_html/caimna/transcendental/polynomial%20methods/bv%20method.html C++: http://books.google.co.il/books?id=cL1boM2uyQwC&pg=SA3-PA51&lpg=SA3-PA51&dq=Birge-Vieta+Method+c%2B%2B&source=bl&ots=QZmnDTK3rC&sig=BPNcHHbpR_DKVoZXrLi4nVXD-gg&hl=en&sa=X&ei=R-_DUK2iNIjzsgbE5ID4Dg&redir_esc=y#v=onepage&q=Birge-Vieta%20Method%20c%2B%2B&f=false combines Horner's method of polynomial evaluation (transforming into lesser degree polynomials that are more computationally efficient to process) with Newton-Raphson to provide a computational speed-up Interpolation Overview Construct new data points for as close as possible fit within range of a discrete set of known points (that were obtained via sampling, experimentation) Use Taylor Series Expansion of a function f(x) around a specific value for x Linear Interpolation http://en.wikipedia.org/wiki/Linear_interpolation C++: http://www.hamaluik.com/?p=289 Straight line between 2 points à concatenate interpolants between each pair of data points Bilinear Interpolation http://en.wikipedia.org/wiki/Bilinear_interpolation C++: http://supercomputingblog.com/graphics/coding-bilinear-interpolation/2/ Extension of the linear function for interpolating functions of 2 variables – perform linear interpolation first in 1 direction, then in another. Used in image processing – e.g. texture mapping filter. Uses 4 vertices to interpolate a value within a unit cell. Lagrange Interpolation http://en.wikipedia.org/wiki/Lagrange_polynomial C++: http://www.codecogs.com/code/maths/approximation/interpolation/lagrange.php For polynomials Requires recomputation for all terms for each distinct x value – can only be applied for small number of nodes Numerically unstable Barycentric Interpolation http://epubs.siam.org/doi/pdf/10.1137/S0036144502417715 C++: http://www.gamedev.net/topic/621445-barycentric-coordinates-c-code-check/ Rearrange the terms in the equation of the Legrange interpolation by defining weight functions that are independent of the interpolated value of x Newton Divided Difference Interpolation http://en.wikipedia.org/wiki/Newton_polynomial C++: http://jee-appy.blogspot.co.il/2011/12/newton-divided-difference-interpolation.html Hermite Divided Differences: Interpolation polynomial approximation for a given set of data points in the NR form - divided differences are used to approximately calculate the various differences. For a given set of 3 data points , fit a quadratic interpolant through the data Bracketed functions allow Newton divided differences to be calculated recursively Difference table Cubic Spline Interpolation http://en.wikipedia.org/wiki/Spline_interpolation C++: https://www.marcusbannerman.co.uk/index.php/home/latestarticles/42-articles/96-cubic-spline-class.html Spline is a piecewise polynomial Provides smoothness – for interpolations with significantly varying data Use weighted coefficients to bend the function to be smooth & its 1st & 2nd derivatives are continuous through the edge points in the interval Curve Fitting A generalization of interpolating whereby given data points may contain noise à the curve does not necessarily pass through all the points Least Squares Fit http://en.wikipedia.org/wiki/Least_squares C++: http://www.ccas.ru/mmes/educat/lab04k/02/least-squares.c Residual – difference between observed value & expected value Model function is often chosen as a linear combination of the specified functions Determines: A) The model instance in which the sum of squared residuals has the least value B) param values for which model best fits data Straight Line Fit Linear correlation between independent variable and dependent variable Linear Regression http://en.wikipedia.org/wiki/Linear_regression C++: http://www.oocities.org/david_swaim/cpp/linregc.htm Special case of statistically exact extrapolation Leverage least squares Given a basis function, the sum of the residuals is determined and the corresponding gradient equation is expressed as a set of normal linear equations in matrix form that can be solved (e.g. using LU Decomposition) Can be weighted - Drop the assumption that all errors have the same significance –-> confidence of accuracy is different for each data point. Fit the function closer to points with higher weights Polynomial Fit - use a polynomial basis function Moving Average http://en.wikipedia.org/wiki/Moving_average C++: http://www.codeproject.com/Articles/17860/A-Simple-Moving-Average-Algorithm Used for smoothing (cancel fluctuations to highlight longer-term trends & cycles), time series data analysis, signal processing filters Replace each data point with average of neighbors. Can be simple (SMA), weighted (WMA), exponential (EMA). Lags behind latest data points – extra weight can be given to more recent data points. Weights can decrease arithmetically or exponentially according to distance from point. Parameters: smoothing factor, period, weight basis Optimization Overview Given function with multiple variables, find Min (or max by minimizing –f(x)) Iterative approach Efficient, but not necessarily reliable Conditions: noisy data, constraints, non-linear models Detection via sign of first derivative - Derivative of saddle points will be 0 Local minima Bisection method Similar method for finding a root for a non-linear equation Start with an interval that contains a minimum Golden Search method http://en.wikipedia.org/wiki/Golden_section_search C++: http://www.codecogs.com/code/maths/optimization/golden.php Bisect intervals according to golden ratio 0.618.. Achieves reduction by evaluating a single function instead of 2 Newton-Raphson Method Brent method http://en.wikipedia.org/wiki/Brent's_method C++: http://people.sc.fsu.edu/~jburkardt/cpp_src/brent/brent.cpp Based on quadratic or parabolic interpolation – if the function is smooth & parabolic near to the minimum, then a parabola fitted through any 3 points should approximate the minima – fails when the 3 points are collinear , in which case the denominator is 0 Simplex Method http://en.wikipedia.org/wiki/Simplex_algorithm C++: http://www.codeguru.com/cpp/article.php/c17505/Simplex-Optimization-Algorithm-and-Implemetation-in-C-Programming.htm Find the global minima of any multi-variable function Direct search – no derivatives required At each step it maintains a non-degenerative simplex – a convex hull of n+1 vertices. Obtains the minimum for a function with n variables by evaluating the function at n-1 points, iteratively replacing the point of worst result with the point of best result, shrinking the multidimensional simplex around the best point. Point replacement involves expanding & contracting the simplex near the worst value point to determine a better replacement point Oscillation can be avoided by choosing the 2nd worst result Restart if it gets stuck Parameters: contraction & expansion factors Simulated Annealing http://en.wikipedia.org/wiki/Simulated_annealing C++: http://code.google.com/p/cppsimulatedannealing/ Analogy to heating & cooling metal to strengthen its structure Stochastic method – apply random permutation search for global minima - Avoid entrapment in local minima via hill climbing Heating schedule - Annealing schedule params: temperature, iterations at each temp, temperature delta Cooling schedule – can be linear, step-wise or exponential Differential Evolution http://en.wikipedia.org/wiki/Differential_evolution C++: http://www.amichel.com/de/doc/html/ More advanced stochastic methods analogous to biological processes: Genetic algorithms, evolution strategies Parallel direct search method against multiple discrete or continuous variables Initial population of variable vectors chosen randomly – if weighted difference vector of 2 vectors yields a lower objective function value then it replaces the comparison vector Many params: #parents, #variables, step size, crossover constant etc Convergence is slow – many more function evaluations than simulated annealing Numerical Differentiation Overview 2 approaches to finite difference methods: · A) approximate function via polynomial interpolation then differentiate · B) Taylor series approximation – additionally provides error estimate Finite Difference methods http://en.wikipedia.org/wiki/Finite_difference_method C++: http://www.wpi.edu/Pubs/ETD/Available/etd-051807-164436/unrestricted/EAMPADU.pdf Find differences between high order derivative values - Approximate differential equations by finite differences at evenly spaced data points Based on forward & backward Taylor series expansion of f(x) about x plus or minus multiples of delta h. Forward / backward difference - the sums of the series contains even derivatives and the difference of the series contains odd derivatives – coupled equations that can be solved. Provide an approximation of the derivative within a O(h^2) accuracy There is also central difference & extended central difference which has a O(h^4) accuracy Richardson Extrapolation http://en.wikipedia.org/wiki/Richardson_extrapolation C++: http://mathscoding.blogspot.co.il/2012/02/introduction-richardson-extrapolation.html A sequence acceleration method applied to finite differences Fast convergence, high accuracy O(h^4) Derivatives via Interpolation Cannot apply Finite Difference method to discrete data points at uneven intervals – so need to approximate the derivative of f(x) using the derivative of the interpolant via 3 point Lagrange Interpolation Note: the higher the order of the derivative, the lower the approximation precision Numerical Integration Estimate finite & infinite integrals of functions More accurate procedure than numerical differentiation Use when it is not possible to obtain an integral of a function analytically or when the function is not given, only the data points are Newton Cotes Methods http://en.wikipedia.org/wiki/Newton%E2%80%93Cotes_formulas C++: http://www.siafoo.net/snippet/324 For equally spaced data points Computationally easy – based on local interpolation of n rectangular strip areas that is piecewise fitted to a polynomial to get the sum total area Evaluate the integrand at n+1 evenly spaced points – approximate definite integral by Sum Weights are derived from Lagrange Basis polynomials Leverage Trapezoidal Rule for default 2nd formulas, Simpson 1/3 Rule for substituting 3 point formulas, Simpson 3/8 Rule for 4 point formulas. For 4 point formulas use Bodes Rule. Higher orders obtain more accurate results Trapezoidal Rule uses simple area, Simpsons Rule replaces the integrand f(x) with a quadratic polynomial p(x) that uses the same values as f(x) for its end points, but adds a midpoint Romberg Integration http://en.wikipedia.org/wiki/Romberg's_method C++: http://code.google.com/p/romberg-integration/downloads/detail?name=romberg.cpp&can=2&q= Combines trapezoidal rule with Richardson Extrapolation Evaluates the integrand at equally spaced points The integrand must have continuous derivatives Each R(n,m) extrapolation uses a higher order integrand polynomial replacement rule (zeroth starts with trapezoidal) à a lower triangular matrix set of equation coefficients where the bottom right term has the most accurate approximation. The process continues until the difference between 2 successive diagonal terms becomes sufficiently small. Gaussian Quadrature http://en.wikipedia.org/wiki/Gaussian_quadrature C++: http://www.alglib.net/integration/gaussianquadratures.php Data points are chosen to yield best possible accuracy – requires fewer evaluations Ability to handle singularities, functions that are difficult to evaluate The integrand can include a weighting function determined by a set of orthogonal polynomials. Points & weights are selected so that the integrand yields the exact integral if f(x) is a polynomial of degree <= 2n+1 Techniques (basically different weighting functions): · Gauss-Legendre Integration w(x)=1 · Gauss-Laguerre Integration w(x)=e^-x · Gauss-Hermite Integration w(x)=e^-x^2 · Gauss-Chebyshev Integration w(x)= 1 / Sqrt(1-x^2) Solving ODEs Use when high order differential equations cannot be solved analytically Evaluated under boundary conditions RK for systems – a high order differential equation can always be transformed into a coupled first order system of equations Euler method http://en.wikipedia.org/wiki/Euler_method C++: http://rosettacode.org/wiki/Euler_method First order Runge–Kutta method. Simple recursive method – given an initial value, calculate derivative deltas. Unstable & not very accurate (O(h) error) – not used in practice A first-order method - the local error (truncation error per step) is proportional to the square of the step size, and the global error (error at a given time) is proportional to the step size In evolving solution between data points xn & xn+1, only evaluates derivatives at beginning of interval xn à asymmetric at boundaries Higher order Runge Kutta http://en.wikipedia.org/wiki/Runge%E2%80%93Kutta_methods C++: http://www.dreamincode.net/code/snippet1441.htm 2nd & 4th order RK - Introduces parameterized midpoints for more symmetric solutions à accuracy at higher computational cost Adaptive RK – RK-Fehlberg – estimate the truncation at each integration step & automatically adjust the step size to keep error within prescribed limits. At each step 2 approximations are compared – if in disagreement to a specific accuracy, the step size is reduced Boundary Value Problems Where solution of differential equations are located at 2 different values of the independent variable x à more difficult, because cannot just start at point of initial value – there may not be enough starting conditions available at the end points to produce a unique solution An n-order equation will require n boundary conditions – need to determine the missing n-1 conditions which cause the given conditions at the other boundary to be satisfied Shooting Method http://en.wikipedia.org/wiki/Shooting_method C++: http://ganeshtiwaridotcomdotnp.blogspot.co.il/2009/12/c-c-code-shooting-method-for-solving.html Iteratively guess the missing values for one end & integrate, then inspect the discrepancy with the boundary values of the other end to adjust the estimate Given the starting boundary values u1 & u2 which contain the root u, solve u given the false position method (solving the differential equation as an initial value problem via 4th order RK), then use u to solve the differential equations. Finite Difference Method For linear & non-linear systems Higher order derivatives require more computational steps – some combinations for boundary conditions may not work though Improve the accuracy by increasing the number of mesh points Solving EigenValue Problems An eigenvalue can substitute a matrix when doing matrix multiplication à convert matrix multiplication into a polynomial EigenValue For a given set of equations in matrix form, determine what are the solution eigenvalue & eigenvectors Similar Matrices - have same eigenvalues. Use orthogonal similarity transforms to reduce a matrix to diagonal form from which eigenvalue(s) & eigenvectors can be computed iteratively Jacobi method http://en.wikipedia.org/wiki/Jacobi_method C++: http://people.sc.fsu.edu/~jburkardt/classes/acs2_2008/openmp/jacobi/jacobi.html Robust but Computationally intense – use for small matrices < 10x10 Power Iteration http://en.wikipedia.org/wiki/Power_iteration For any given real symmetric matrix, generate the largest single eigenvalue & its eigenvectors Simplest method – does not compute matrix decomposition à suitable for large, sparse matrices Inverse Iteration Variation of power iteration method – generates the smallest eigenvalue from the inverse matrix Rayleigh Method http://en.wikipedia.org/wiki/Rayleigh's_method_of_dimensional_analysis Variation of power iteration method Rayleigh Quotient Method Variation of inverse iteration method Matrix Tri-diagonalization Method Use householder algorithm to reduce an NxN symmetric matrix to a tridiagonal real symmetric matrix vua N-2 orthogonal transforms     Whats Next Outside of Numerical Methods there are lots of different types of algorithms that I’ve learned over the decades: Data Mining – (I covered this briefly in a previous post: http://geekswithblogs.net/JoshReuben/archive/2007/12/31/ssas-dm-algorithms.aspx ) Search & Sort Routing Problem Solving Logical Theorem Proving Planning Probabilistic Reasoning Machine Learning Solvers (eg MIP) Bioinformatics (Sequence Alignment, Protein Folding) Quant Finance (I read Wilmott’s books – interesting) Sooner or later, I’ll cover the above topics as well.

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  • jQuery Ajax Error Handling – How To Show Custom Error Messages

    - by schnieds
    So you want to make your error feedback nice for your users…Kind of an ironic statement isn’t it? We obviously want to avoid errors if at all possible in our applications, but when errors do occur then we want to provide some nice feedback to our users. The worst thing that can happen is to blow up a huge server exception page when something goes wrong or equally bad is not providing any feedback at all and leaving the user in the dark. Although I do not recommend displaying actual .NET Framework exception messages or stack traces to the user in most instances; they are usually not helpful to the user and can be a security concern.... [Read More]Aaron Schniederhttp://www.churchofficeonline.com

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  • Is Social Media The Vital Skill You Aren’t Tracking?

    - by HCM-Oracle
    By Mark Bennett - Originally featured in Talent Management Excellence The ever-increasing presence of the workforce on social media presents opportunities as well as risks for organizations. While on the one hand, we read about social media embarrassments happening to organizations, on the other we see that social media activities by workers and candidates can enhance a company’s brand and provide insight into what individuals are, or can become, influencers in the social media sphere. HR can play a key role in helping organizations make the most value out of the activities and presence of workers and candidates, while at the same time also helping to manage the risks that come with the permanence and viral nature of social media. What is Missing from Understanding Our Workforce? “If only HP knew what HP knows, we would be three-times more productive.”  Lew Platt, Former Chairman, President, CEO, Hewlett-Packard  What Lew Platt recognized was that organizations only have a partial understanding of what their workforce is capable of. This lack of understanding impacts the company in several negative ways: 1. A particular skill that the company needs to access in one part of the organization might exist somewhere else, but there is no record that the skill exists, so the need is unfulfilled. 2. As market conditions change rapidly, the company needs to know strategic options, but some options are missed entirely because the company doesn’t know that sufficient capability already exists to enable those options. 3. Employees may miss out on opportunities to demonstrate how their hidden skills could create new value to the company. Why don’t companies have that more complete picture of their workforce capabilities – that is, not know what they know? One very good explanation is that companies put most of their efforts into rating their workforce according to the jobs and roles they are filling today. This is the essence of two important talent management processes: recruiting and performance appraisals.  In recruiting, a set of requirements is put together for a job, either explicitly or indirectly through a job description. During the recruiting process, much of the attention is paid towards whether the candidate has the qualifications, the skills, the experience and the cultural fit to be successful in the role. This makes a lot of sense.  In the performance appraisal process, an employee is measured on how well they performed the functions of their role and in an effort to help the employee do even better next time, they are also measured on proficiency in the competencies that are deemed to be key in doing that job. Again, the logic is impeccable.  But in both these cases, two adages come to mind: 1. What gets measured is what gets managed. 2. You only see what you are looking for. In other words, the fact that the current roles the workforce are performing are the basis for measuring which capabilities the workforce has, makes them the only capabilities to be measured. What was initially meant to be a positive, i.e. identify what is needed to perform well and measure it, in order that it can be managed, comes with the unintended negative consequence of overshadowing the other capabilities the workforce has. This also comes with an employee engagement price, for the measurements and management of workforce capabilities is to typically focus on where the workforce comes up short. Again, it makes sense to do this, since improving a capability that appears to result in improved performance benefits, both the individual through improved performance ratings and the company through improved productivity. But this is based on the assumption that the capabilities identified and their required proficiencies are the only attributes of the individual that matter. Anything else the individual brings that results in high performance, while resulting in a desired performance outcome, often goes unrecognized or underappreciated at best. As social media begins to occupy a more important part in current and future roles in organizations, businesses must incorporate social media savvy and innovation into job descriptions and expectations. These new measures could provide insight into how well someone can use social media tools to influence communities and decision makers; keep abreast of trends in fast-moving industries; present a positive brand image for the organization around thought leadership, customer focus, social responsibility; and coordinate and collaborate with partners. These measures should demonstrate the “social capital” the individual has invested in and developed over time. Without this dimension, “short cut” methods may generate a narrow set of positive metrics that do not have real, long-lasting benefits to the organization. How Workforce Reputation Management Helps HR Harness Social Media With hundreds of petabytes of social media data flowing across Facebook, LinkedIn and Twitter, businesses are tapping technology solutions to effectively leverage social for HR. Workforce reputation management technology helps organizations discover, mobilize and retain talent by providing insight into the social reputation and influence of the workforce while also helping organizations monitor employee social media policy compliance and mitigate social media risk.  There are three major ways that workforce reputation management technology can play a strategic role to support HR: 1. Improve Awareness and Decisions on Talent Many organizations measure the skills and competencies that they know they need today, but are unaware of what other skills and competencies their workforce has that could be essential tomorrow. How about whether your workforce has the reputation and influence to make their skills and competencies more effective? Many organizations don’t have insight into the social media “reach” their workforce has, which is becoming more critical to business performance. These features help organizations, managers, and employees improve many talent processes and decision making, including the following: Hiring and Assignments. People and teams with higher reputations are considered more valuable and effective workers. Someone with high reputation who refers a candidate also can have high credibility as a source for hires.   Training and Development. Reputation trend analysis can impact program decisions regarding training offerings by showing how reputation and influence across the workforce changes in concert with training. Worker reputation impacts development plans and goal choices by helping the individual see which development efforts result in improved reputation and influence.   Finding Hidden Talent. Managers can discover hidden talent and skills amongst employees based on a combination of social profile information and social media reputation. Employees can improve their personal brand and accelerate their career development.  2. Talent Search and Discovery The right technology helps organizations find information on people that might otherwise be hidden. By leveraging access to candidate and worker social profiles as well as their social relationships, workforce reputation management provides companies with a more complete picture of what their knowledge, skills, and attributes are and what they can in turn access. This more complete information helps to find the right talent both outside the organization as well as the right, perhaps previously hidden talent, within the organization to fill roles and staff projects, particularly those roles and projects that are required in reaction to fast-changing opportunities and circumstances. 3. Reputation Brings Credibility Workforce reputation management technology provides a clearer picture of how candidates and workers are viewed by their peers and communities across a wide range of social reputation and influence metrics. This information is less subject to individual bias and can impact critical decision-making. Knowing the individual’s reputation and influence enables the organization to predict how well their capabilities and behaviors will have a positive effect on desired business outcomes. Many roles that have the highest impact on overall business performance are dependent on the individual’s influence and reputation. In addition, reputation and influence measures offer a very tangible source of feedback for workers, providing them with insight that helps them develop themselves and their careers and see the effectiveness of those efforts by tracking changes over time in their reputation and influence. The following are some examples of the different reputation and influence measures of the workforce that Workforce Reputation Management could gather and analyze: Generosity – How often the user reposts other’s posts. Influence – How often the user’s material is reposted by others.  Engagement – The ratio of recent posts with references (e.g. links to other posts) to the total number of posts.  Activity – How frequently the user posts. (e.g. number per day)  Impact – The size of the users’ social networks, which indicates their ability to reach unique followers, friends, or users.   Clout – The number of references and citations of the user’s material in others’ posts.  The Vital Ingredient of Workforce Reputation Management: Employee Participation “Nothing about me, without me.” Valerie Billingham, “Through the Patient’s Eyes”, Salzburg Seminar Session 356, 1998 Since data resides primarily in social media, a question arises: what manner is used to collect that data? While much of social media activity is publicly accessible (as many who wished otherwise have learned to their chagrin), the social norms of social media have developed to put some restrictions on what is acceptable behavior and by whom. Disregarding these norms risks a repercussion firestorm. One of the more recognized norms is that while individuals can follow and engage with other individual’s public social activity (e.g. Twitter updates) fairly freely, the more an organization does this unprompted and without getting permission from the individual beforehand, the more likely the organization risks a totally opposite outcome from the one desired. Instead, the organization must look for permission from the individual, which can be met with resistance. That resistance comes from not knowing how the information will be used, how it will be shared with others, and not receiving enough benefit in return for granting permission. As the quote above about patient concerns and rights succinctly states, no one likes not feeling in control of the information about themselves, or the uncertainty about where it will be used. This is well understood in consumer social media (i.e. permission-based marketing) and is applicable to workforce reputation management. However, asking permission leaves open the very real possibility that no one, or so few, will grant permission, resulting in a small set of data with little usefulness for the company. Connecting Individual Motivation to Organization Needs So what is it that makes an individual decide to grant an organization access to the data it wants? It is when the individual’s own motivations are in alignment with the organization’s objectives. In the case of workforce reputation management, when the individual is motivated by a desire for increased visibility and career growth opportunities to advertise their skills and level of influence and reputation, they are aligned with the organizations’ objectives; to fill resource needs or strategically build better awareness of what skills are present in the workforce, as well as levels of influence and reputation. Individuals can see the benefit of granting access permission to the company through multiple means. One is through simple social awareness; they begin to discover that peers who are getting more career opportunities are those who are signed up for workforce reputation management. Another is where companies take the message directly to the individual; we think you would benefit from signing up with our workforce reputation management solution. Another, more strategic approach is to make reputation management part of a larger Career Development effort by the company; providing a wide set of tools to help the workforce find ways to plan and take action to achieve their career aspirations in the organization. An effective mechanism, that facilitates connecting the visibility and career growth motivations of the workforce with the larger context of the organization’s business objectives, is to use game mechanics to help individuals transform their career goals into concrete, actionable steps, such as signing up for reputation management. This works in favor of companies looking to use workforce reputation because the workforce is more apt to see how it fits into achieving their overall career goals, as well as seeing how other participation brings additional benefits.  Once an individual has signed up with reputation management, not only have they made themselves more visible within the organization and increased their career growth opportunities, they have also enabled a tool that they can use to better understand how their actions and behaviors impact their influence and reputation. Since they will be able to see their reputation and influence measurements change over time, they will gain better insight into how reputation and influence impacts their effectiveness in a role, as well as how their behaviors and skill levels in turn affect their influence and reputation. This insight can trigger much more directed, and effective, efforts by the individual to improve their ability to perform at a higher level and become more productive. The increased sense of autonomy the individual experiences, in linking the insight they gain to the actions and behavior changes they make, greatly enhances their engagement with their role as well as their career prospects within the company. Workforce reputation management takes the wide range of disparate data about the workforce being produced across various social media platforms and transforms it into accessible, relevant, and actionable information that helps the organization achieve its desired business objectives. Social media holds untapped insights about your talent, brand and business, and workforce reputation management can help unlock them. Imagine - if you could find the hidden secrets of your businesses, how much more productive and efficient would your organization be? Mark Bennett is a Director of Product Strategy at Oracle. Mark focuses on setting the strategic vision and direction for tools that help organizations understand, shape, and leverage the capabilities of their workforce to achieve business objectives, as well as help individuals work effectively to achieve their goals and navigate their own growth. His combination of a deep technical background in software design and development, coupled with a broad knowledge of business challenges and thinking in today’s globalized, rapidly changing, technology accelerated economy, has enabled him to identify and incorporate key innovations that are central to Oracle Fusion’s unique value proposition. Mark has over the course of his career been in charge of the design, development, and strategy of Talent Management products and the design and development of cutting edge software that is better equipped to handle the increasingly complex demands of users while also remaining easy to use. Follow him @mpbennett

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  • So Your Laptop’s Fan Has Stopped Working Then? [Humorous Image]

    - by Asian Angel
    There is such a thing as dust build-up and then there are the odd cases of dust-ball evolution… What is the worst case of dust build-up that you have dealt with? Make sure to share your stories with your fellow readers in the comments! Help, my laptop’s fan is not working! [via Reddit Tech Support Gore] Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • Use Evernote’s Secret Debug Menu to Optimize and Speed Up Searching

    - by The Geek
    If your Evernote installation has become sluggish after adding thousands of notes, you might be able to speed it up a bit with this great tip from Matthew’s TechInch blog that uncovers a secret debug menu in the latest Windows client. It’s important to note that Evernote runs database optimization in the background automatically, so this really shouldn’t be necessary, but if your database is sluggish, anything is worth a shot, right Latest Features How-To Geek ETC How to Upgrade Windows 7 Easily (And Understand Whether You Should) The How-To Geek Guide to Audio Editing: Basic Noise Removal Install a Wii Game Loader for Easy Backups and Fast Load Times The Best of CES (Consumer Electronics Show) in 2011 The Worst of CES (Consumer Electronics Show) in 2011 HTG Projects: How to Create Your Own Custom Papercraft Toy Firefox 4.0 Beta 9 Available for Download – Get Your Copy Now The Frustrations of a Computer Literate Watching a Newbie Use a Computer [Humorous Video] Season0nPass Jailbreaks Current Gen Apple TVs IBM’s Jeopardy Playing Computer Watson Shows The Pros How It’s Done [Video] Tranquil Juice Drop Abstract Wallpaper Pulse Is a Sleek Newsreader for iOS and Android Devices

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  • Never Call Me at Work [Humorous Star Wars Video]

    - by Asian Angel
    Have you ever had one of those days when someone close to you calls at the worst possible time? See what happens when this stormtrooper’s wife calls him while he is at work above Tatooine! Needless to say Darth Vader is in a “less than forgiving” mood… Never Call Me At Work [YouTube] Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Never Call Me at Work [Humorous Star Wars Video] Add an Image Properties Listing to the Context Menu in Chrome and Iron Add an Easy to View Notification Badge to Tabs in Firefox SpellBook Parks Bookmarklets in Chrome’s Context Menu Drag2Up Brings Multi-Source Drag and Drop Uploading to Firefox Enchanted Swing in the Forest Wallpaper

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  • Designing for the future

    - by Dennis Vroegop
    User interfaces and user experience design is a fast moving field. It’s something that changes pretty quick: what feels fresh today will look outdated tomorrow. I remember the day I first got a beta version of Windows 95 and I felt swept away by the user interface of the OS. It felt so modern! If I look back now, it feels old. Well, it should: the design is 17 years old which is an eternity in our field. Of course, this is not limited to UI. Same goes for many industries. I want you to think back of the cars that amazed you when you were in your teens (if you are in your teens then this may not apply to you). Didn’t they feel like part of the future? Didn’t you think that this was the ultimate in designs? And aren’t those designs hopelessly outdated today (again, depending on your age, it may just be me)? Let’s review the Win95 design: And let’s compare that to Windows 7: There are so many differences here, I wouldn’t even know where to start explaining them. The general feeling however is one of more usability: studies have shown Windows 7 is much easier to understand for new users than the older versions of Windows did. Of course, experienced Windows users didn’t like it: people are usually afraid of changes and like to stick to what they know. But for new users this was a huge improvement. And that is what UX design is all about: make a product easier to use, with less training required and make users feel more productive. Still, there are areas where this doesn’t hold up. There are plenty examples of designs from the past that are still fresh today. But if you look closely at them, you’ll notice some subtle differences. This differences are what keep the designs fresh. A good example is the signs you’ll find on the road. They haven’t changed much over the years (otherwise people wouldn’t recognize them anymore) but they have been changing gradually to reflect changes in traffic. The same goes for computer interfaces. With each new product or version of a product, the UI and UX is changed gradually. Every now and then however, a bigger change is needed. Just think about the introduction of the Ribbon in Microsoft Office 2007: the whole UI was redesigned. A lot of old users (not in age, but in times of using older versions) didn’t like it a bit, but new users or casual users seem to be more efficient using the product. Which, of course, is exactly the reason behind the changes. I believe that a big engine behind the changes in User Experience design has been the web. In the old days (i.e. before the explosion of the internet) user interface design in Windows applications was limited to choosing the margins between your battleship gray buttons. When the web came along, and especially the web 2.0 where the browsers started to act more and more as application platforms, designers stepped in and made a huge impact. In the browser, they could do whatever they wanted. In the beginning this was limited to the darn blink tag but gradually people really started to think about UX. Even more so: the design of the UI and the whole experience was taken away from the developers and put into the hands of people who knew what they were doing: UX designers. This caused some problems. Everyone who has done a web project in the early 2000’s must have had the same experience: the designers give you a set of Photoshop files and tell you to translate it to HTML. Which, of course, is very hard to do. However, with new tooling and new standards this became much easier. The latest version of HTML and CSS has taken the responsibility for the design away from the developers and placed them in the capable hands of the designers. And that’s where that responsibility belongs, after all, I don’t want a designer to muck around in my c# code just as much as he or she doesn’t want me to poke in the sites style definitions. This change in responsibilities resulted in good looking but more important: better thought out user interfaces in websites. And when websites became more and more interactive, people started to expect the same sort of look and feel from their desktop applications. But that didn’t really happen. Most business applications still have that battleship gray look and feel. Ok, they may use a different color but we’re not talking colors here but usability. Now, you may not be able to read the Dutch captions, but even if you did you wouldn’t understand what was going on. At least, not when you first see it. You have to scan the screen, read all the labels, see how they are related to the other elements on the screen and then figure out what they do. If you’re an experienced user of this application however, this might be a good thing: you know what to do and you get all the information you need in one single screen. But for most applications this isn’t the case. A lot of people only use their computer for a limited time a day (a weird concept for me, but it happens) and need it to get something done and then get on with their lives. For them, a user interface experience like the above isn’t working. (disclaimer: I just picked a screenshot, I am not saying this is bad software but it is an example of about 95% of the Windows applications out there). For the knowledge worker, this isn’t a problem. They use one or two systems and they know exactly what they need to do to achieve their goal. They don’t want any clutter on their screen that distracts them from their task, they just want to be as efficient as possible. When they know the systems they are very productive. The point is, how long does it take to become productive? And: could they be even more productive if the UX was better? Are there things missing that they don’t know about? Are there better ways to achieve what they want to achieve? Also: could a system be designed in such a way that it is not only much more easy to work with but also less tiring? in the example above you need to switch between the keyboard and mouse a lot, something that we now know can be very tiring. The goal of most applications (being client apps or websites on any kind of device) is to provide information. Information is data that when given to the right people, on the right time, in the right place and when it is correct adds value for that person (please, remember that definition: I still hear the statement “the information was wrong” which doesn’t make sense: data can be wrong, information cannot be). So if a system provides data, how can we make sure the chances of becoming information is as high as possible? A good example of a well thought-out system that attempts this is the Zune client. It is a very good application, and I think the UX is much better than it’s main competitor iTunes. Have a look at both: On the left you see the iTunes screenshot, on the right the Zune. As you notice, the Zune screen has more images but less chrome (chrome being visuals not part of the data you want to show, i.e. edges around buttons). The whole thing is text oriented or image oriented, where that text or image is part of the information you need. What is important is big, what’s less important is smaller. Yet, everything you need to know at that point is present and your attention is drawn immediately to what you’re trying to achieve: information about music. You can easily switch between the content on your machine and content on your Zune player but clicking on the image of the player. But if you didn’t know that, you’d find out soon enough: the whole UX is designed in such a way that it invites you to play around. So sooner or later (probably sooner) you’d click on that image and you would see what it does. In the iTunes version it’s harder to find: the discoverability is a lot lower. For inexperienced people the Zune player feels much more natural than the iTunes player, and they get up to speed a lot faster. How does this all work? Why is this UX better? The answer lies in a project from Microsoft with the codename (it seems to be becoming the official name though) “Metro”. Metro is a design language, based on certain principles. When they thought about UX they took a good long look around them and went out in search of metaphors. And they found them. The team noticed that signage in streets, airports, roads, buildings and so on are usually very clear and very precise. These signs give you the information you need and nothing more. It’s simple, clearly understood and fast to understand. A good example are airport signs. Airports can be intimidating places, especially for the non-experienced traveler. In the early 1990’s Amsterdam Airport Schiphol decided to redesign all the signage to make the traveller feel less disoriented. They developed a set of guidelines for signs and implemented those. Soon, most airports around the world adopted these ideas and you see variations of the Dutch signs everywhere on the globe. The signs are text-oriented. Yes, there are icons explaining what it all means for the people who can’t read or don’t understand the language, but the basic sign language is text. It’s clear, it’s high-contrast and it’s easy to understand. One look at the sign and you know where to go. The only thing I don’t like is the green sign pointing to the emergency exit, but since this is the default style for emergency exits I understand why they did this. If you look at the Zune UI again, you’ll notice the similarities. Text oriented, little or no icons, clear usage of fonts and all the information you need. This design language has a set of principles: Clean, light, open and fast Content, not chrome Soulful and alive These are just a couple of the principles, you can read the whole philosophy behind Metro for Windows Phone 7 here. These ideas seem to work. I love my Windows Phone 7. It’s easy to use, it’s clear, there’s no clutter that I do not need. It works for me. And I noticed it works for a lot of other people as well, especially people who aren’t as proficient with computers as I am. You see these ideas in a lot other places. Corning, a manufacturer of glass, has made a video of possible usages of their products. It’s their glimpse into the future. You’ll notice that a lot of the UI in the screens look a lot like what Microsoft is doing with Metro (not coincidentally Corning is the supplier for the Gorilla glass display surface on the new SUR40 device (or Surface v2.0 as a lot of people call it)). The idea behind this vision is that data should be available everywhere where you it. Systems should be available at all times and data is presented in a clear and light manner so that you can turn that data into information. You don’t need a lot of fancy animations that only distract from the data. You want the data and you want it fast. Have a look at this truly inspiring video that made: This is what I believe the future will look like. Of course, not everything is possible, or even desirable. But it is a nice way to think about the future . I feel very strongly about designing applications in such a way that they add value to the user. Designing applications that turn data into information. Applications that make the user feel happy to use them. So… when are you going to drop the battleship-gray designs? Tags van Technorati: surface,design,windows phone 7,wp7,metro

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  • Silverlight Grid Layout is pain

    - by brainbox
     I think one of the biggest mistake of Silverlight and WPF is its Grid layout.Imagine you have a data form with 2 columns and 5 rows. You need to place new row after the first one. As a result you need to rewrite Grid.Rows and Grid.Columns in all rows belows. But the worst thing of such approach is that it is static. So you need predefine all your rows and columns. As a result creating of simple dynamic datagrid or dataform become impossible... So the question if why best practices of HTML and Adobe Flex were dropped????If anybody have tried to port Flex Grid layout to silverlight please mail me or drop a comment.

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  • Issues with ganglia and upstart in 13.04

    - by theist
    I'm having an issue with ganglia-monitor and upstart. Just after installing it starts and it cannot be stopped. I tried to solve it following http://upstart.ubuntu.com/cookbook/#expect but I can achieve upstart to track the actual pid of gmond. Assuming the configuration of the init config is wrong i followed direcetions in http://upstart.ubuntu.com/cookbook/#how-to-establish-fork-count in order to try to fix it. As it states a count of 1 means "exec fork" stanza and 2 means "exec daemon" .... gmond gives a count of 8... And of course I can get it to track the actual PID. I haven't found a bug report or something like that. Is there something I missed ? Upstart seems to be failing and the worst thing is that upstart hangs on start/stop and I cannot even uninstall or reconfigure packages.

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  • Red Gate does Byte Night 2012

    - by red(at)work
    On the 5th of October 2012, a team of nine plucky Red Gaters braved the howling wind and the driving rain to sleep outside. No tents or mattresses were allowed – all we took for protection were sleeping bags, groundsheets, plastic sacks and Colin’s enormous fishing umbrella (a godsend in umbrella-y disguise). Why would we do such a thing? For Byte Night, an annual tech sector sleepout in support of Action for Children, who tackle the causes as well as the consequences of youth homelessness. Byte Night encourages technology professionals to do for one night a year what thousands of young people have to do every night – sleep rough.  We signed up for Byte Night in the warm, heady midst of the British summer, thinking it couldn’t possibly be all that bad. Even on the night itself – before the rain began to fall, sat in the comfort and warmth of a company canteen, drinking wine and eating chill and preparing to win the pub quiz – we were excited and optimistic about the night that lay ahead of us. All of that changed as soon as we stepped out into one of the worst rainstorms of the year. Brian, the team’s birthday boy, describes it best: Picture the scene: it’s 3 am on a Friday. I’m lying outside, fully clothed in a sleeping bag, wearing a raincoat, trussed up inside a large plastic pocket, on a ground sheet beneath a giant umbrella, wedged so tightly between two of my colleagues that I can’t move my arms. I’m wide awake, staring up at the grey sky beyond the edge of the umbrella; a limp, flickering white glow hints at a moon somewhere behind the drifting clouds. I haven’t slept since we first moved outside at 11 pm. Outside. Did I mention we were outside? I’m hung over. I need the loo. But there is no way on earth that I’m getting out of this sleeping bag. It’s cold. It’s raining. Not just raining, but chucking it down. It’s been doing this non-stop since 10pm. The rain sounds like a hyperactive drummer on the fishing umbrella, and the noise is loud and relentless. Puddles of water are forming all over the groundsheet, and, despite being ensconced inside the plastic pouch, I am wet. The fishing umbrella is protecting me from the worst of the driving rain, but not all of me is under it, and five hours of rain is no match for it. Everything is wet. My left side has become horribly damp. My trainers, which I placed next to my sleeping bag, are now completely soaked through. Mmm. That’ll be fun in the morning. My head is next to Colin’s head on one side, and a multi-pack of McCoy’s cheddar and onion crisps on the other. Don’t ask about the tub of hummus. That’s somewhere down by my ankles, abandoned to the night. Jess, who is lying next to me, rolls over onto her side. A mini waterfall cascades from her rain-pouch onto my face. Bah. I continue to stare into the heavens, willing the dawn to hurry up. Something lands on my face. It’s a mosquito. Great. Midnight, when this still seemed like fun – when we opened some champagne and my colleagues presented me with a caterpillar birthday cake, when everyone was drunk and jolly and full of stoic resolve – feels like a long time ago. Did I mention that today is my birthday? The remains of the caterpillar cake endure the same fate as the hummus, left out in the rain like a metaphor for sadness. It’s getting colder. I can see my breath. Silence has descended on the group, apart from the rustle of plastic. And the rain, obviously. Someone snores, and I envy whoever it is the sweet escape of sleep. I try to wriggle a bit further down inside my sleeping bag, but it doesn’t want to be wriggled into. Only 3 hours till dawn. 180 minutes. I begin to count them off, one at a time.  All nine of us got to go home in the morning, but thousands of children across the UK don’t have that luxury. If you’d like to sponsor the Red Gate Byte Night team, our JustGiving page can be found here.   Chris, before the outside bit actually happened. More photos from Byte Night Cambridge 2012 can be found here.

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  • The Best of CES (Consumer Electronics Show) in 2011

    - by Justin Garrison
    This year, How-To Geek’s own Justin was on-site at the Consumer Electronics Show in Las Vegas, where every gadget manufacturer shows off their latest creations, and he was able to sit down and get hands-on with most of them. Here’s the best of the bunch. Make sure to also check out our list of the Worst of CES 2011, where we covered the gadgets that just didn’t make the cut Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Arctic Theme for Windows 7 Gives Your Desktop an Icy Touch Install LibreOffice via PPA and Receive Auto-Updates in Ubuntu Creative Portraits Peek Inside the Guts of Modern Electronics Scenic Winter Lane Wallpaper to Create a Relaxing Mood Access Your Web Apps Directly Using the Context Menu in Chrome The Deep – Awesome Use of Metal Objects as Deep Sea Creatures [Video]

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  • dual-boot (win-xp/ubu12.04) graphics card for ubu-desktop/win-xp-games

    - by iole1
    for work I need to get a a new and cheap graphics card for a dual boot machine: windows xp/ubuntu 12.04 LTS. The only requirements I have are: it should work 'flawlessly' in ubuntu (proprietary drivers are ok) it should handle Guild Wars 2 & League of Legends in windows xp (this is really the top priority as we need to be able to play at work :) - yes I have a cool job) I know nothing about graphics cards (and it seems to be a jungle out there). From other questions here and some webstigation I think I'd like to go for a Nvidia card, I've been trying to figure out what models fit the system req's but it seems they use different kind of model numbers so I don't get any wiser. tl;dr: will http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gt-620-oem/specifications run Guild Wars 2 http://gamesystemrequirements.com/games.php?id=938 Or what is the worst card from nVidia that will run GW2 smoothly and work well in Ubuntu 12.04 Thanks!

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  • How to make bash quit tab autocompleting hidden directories

    - by Kristopher Micinski
    Most of the time, I don't need autocompletes for my hidden directories. In fact, that's the point of them being hidden! However, annoyingly, bash takes these directories into account when considering tab autocompletion. This is particularly annoying when I have the following scenario: a .svn foler along with a single folder that I want to traverse into by simply pushing tab. (This typically comes up with deep Java packages...) Is there any way to change the default behavior? Worst case scenario I have to type '.' before tab, which seems like a no brainer for my usability.

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  • Empathy chat limits the number of contacts displayed?

    - by Ka7anax
    I'm using Empathy Chat with these accounts: GTalk & Facebook. I just noticed now that from my GTalk friends only 6 appear online (including me) and in reality online are 14 (checked on GMail). And from Facebook it displays 44. So is Empathy Chat limited to display only 50 contacts? I looked through the settings and didn't see anything like this :| The worst part is that I have 1 GTalk contact as Favorite and it's not in the list... Is it a bug? PS: I'm using Ubuntu 10.10

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  • What is the most efficient way to blur in a shader?

    - by concernedcitizen
    I'm currently working on screen space reflections. I have perfectly reflective mirror-like surfaces working, and I now need to use a blur to make the reflection on surfaces with a low specular gloss value look more diffuse. I'm having difficulty deciding how to apply the blur, though. My first idea was to just sample a lower mip level of the screen rendertarget. However, the rendertarget uses SurfaceFormat.HalfVector4 (for HDR effects), which means XNA won't allow linear filtering. Point filtering looks horrible and really doesn't give the visual cue that I want. I've thought about using some kind of Box/Gaussian blur, but this would not be ideal. I've already thrashed the texture cache in the raymarching phase before the blur even occurs (a worst case reflection could be 32 samples per pixel), and the blur kernel to make the reflections look sufficiently diffuse would be fairly large. Does anyone have any suggestions? I know it's doable, as Photon Workshop achieved the effect in Unity.

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  • Friday Fun: Splash Back

    - by Asian Angel
    The best part of the week has finally arrived, so why not take a few minutes to have some quick fun? In this week’s game you get to play with alien goo as you work to clear the game board and reach as high a level as possible Latest Features How-To Geek ETC How to Upgrade Windows 7 Easily (And Understand Whether You Should) The How-To Geek Guide to Audio Editing: Basic Noise Removal Install a Wii Game Loader for Easy Backups and Fast Load Times The Best of CES (Consumer Electronics Show) in 2011 The Worst of CES (Consumer Electronics Show) in 2011 HTG Projects: How to Create Your Own Custom Papercraft Toy Calvin and Hobbes Mix It Up in this Fight Club Parody [Video] Choose from 124 Awesome HTML5 Games to Play at Mozilla Labs Game On Gallery Google Translate for Android Updates to Include Conversation Mode and More Move Your Photoshop Scratch Disk for Improved Performance Winter Storm Clouds on the Horizon Wallpaper Existential Angry Birds [Video]

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  • Sysadmin Nightmares – Server Room Disasters [Videos]

    - by Asian Angel
    There you are, looking at a pristine server room when disaster suddenly strikes! Whether it is fire, floods, or other causes you will feel sympathy for the sysadmins involved when watching this collection of seven server room disasters that Wired has put together. You can view the other six videos in the collection by visiting the Wired post linked below… Server Snuff: 7 Videos of a Sysadmin’s Worst Nightmares [via Fail Desk] HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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  • CodePlex Daily Summary for Saturday, June 04, 2011

    CodePlex Daily Summary for Saturday, June 04, 2011Popular ReleasesSublightCmd: SublightCmd 1.1.0: -added guessTitle switch -improved console output -updated Sublight.Lib -updated SharpZipLib library -added new command: batch (same as downloadbatch) -added waitForExit switch for batch/downloadbatch commandpatterns & practices: Project Silk: Project Silk Community Drop 10 - June 3, 2011: Changes from previous drop: Many code changes: please see the readme.mht for details. New "Application Notifications" chapter. Updated "Server-Side Implementation" chapter. Guidance Chapters Ready for Review The Word documents for the chapters are included with the source code in addition to the CHM to help you provide feedback. The PDF is provided as a separate download for your convenience. Installation Overview To install and run the reference implementation, you must perform the fol...Claims Based Identity & Access Control Guide: Release Candidate: Highlights of this release This is the release candidate drop of the new "Claims Identity Guide" edition. In this release you will find: All code samples, including all ACS v2: ACS as a Federation Provider - Showing authentication with LiveID, Google, etc. ACS as a FP with Multiple Business Partners. ACS and REST endpoints. Using a WP7 client with REST endpoints. All ACS specific chapters. Two new chapters on SharePoint (SSO and Federation) All revised v1 chapters We are now ...Media Companion: MC 3.404b Weekly: Extract the entire archive to a folder which has user access rights, eg desktop, documents etc. Refer to the documentation on this site for the Installation & Setup Guide Important! *** Due to an issue where the date added & the full genre information was not being read into the Movie cache, it is highly recommended that you perform a Rebuild Movies when first running this latest version. This will read in the information from the nfo's & repopulate the cache used by MC during operation. Fi...Terraria Map Generator: TerrariaMapTool 1.0.0.4 Beta: 1) Fixed the generated map.html file so that the file:/// is included in the base path. 2) Added the ability to use parallelization during generation. This will cause the program to use as many threads as there are physical cores. 3) Fixed some background overdraw.DotRas: DotRas v1.2 (Version 1.2.4168): This release includes compiled (and signed) versions of the binaries, PDBs, CHM help documentation, along with both C# and VB.NET examples. Please don't forget to rate the release! If you find a bug, please open a work item and give as much description as possible. Stack traces, which operating system(s) you're targeting, and build type is also very helpful for bug hunting. If you find something you believe to be a bug but are not sure, create a new discussion on the discussions board. Thank...Caliburn Micro: WPF, Silverlight and WP7 made easy.: Caliburn.Micro v1.1 RTW: Download ContentsDebug and Release Assemblies Samples Changes.txt License.txt Release Highlights For WP7A new Tombstoning API based on ideas from Fluent NHibernate A new Launcher/Chooser API Strongly typed Navigation SimpleContainer included The full phone lifecycle is made easy to work with ie. we figure out whether your app is actually Resurrecting or just Continuing for you For WPFSupport for the Client Profile Better support for WinForms integration All PlatformsA power...VidCoder: 0.9.1: Added color coding to the Log window. Errors are highlighted in red, HandBrake logs are in black and VidCoder logs are in dark blue. Moved enqueue button to the right with the other control buttons. Added logic to report failures when errors are logged during the encode or when the encode finishes prematurely. Added Copy button to Log window. Adjusted audio track selection box to always show the full track name. Changed encode job progress bar to also be colored yellow when the enco...AutoLoL: AutoLoL v2.0.1: - Fixed a small bug in Auto Login - Fixed the updaterEPPlus-Create advanced Excel 2007 spreadsheets on the server: EPPlus 2.9.0.1: EPPlus-Create advanced Excel 2007 spreadsheets on the server This version has been updated to .Net Framework 3.5 New Features Data Validation. PivotTables (Basic functionalliy...) Support for worksheet data sources. Column, Row, Page and Data fields. Date and Numeric grouping Build in styles. ...and more And some minor new features... Ranges Text-Property|Get the formated value AutofitColumns-method to set the column width from the content of the range LoadFromCollection-metho...jQuery ASP.Net MVC Controls: Version 1.4.0.0: Version 1.4.0.0 contains the following additions: Upgraded to MVC 3.0 Upgraded to jQuery 1.6.1 (Though the project supports all jQuery version from 1.4.x onwards) Upgraded to jqGrid 3.8 Better Razor View-Engine support Better Pager support, includes support for custom pagers Added jqGrid toolbar buttons support Search module refactored, with full suport for multiple filters and ordering And Code cleanup, bug-fixes and better controller configuration support.Nearforums - ASP.NET MVC forum engine: Nearforums v6.0: Version 6.0 of Nearforums, the ASP.NET MVC Forum Engine, containing new features: Authentication using Membership Provider for SQL Server and MySql Spam prevention: Flood Control Moderation: Flag messages Content management: Pages: Create pages (about us/contact/texts) through web administration Allow nearforums to run as an IIS subapp Migrated Facebook Connect to OAuth 2.0 Visit the project Roadmap for more details.NetOffice - The easiest way to use Office in .NET: NetOffice Release 0.8b: Changes: - fix critical issue 15922(AccessViolationException) once and for all ...update is strongly recommended Known Issues: - some addin ribbon examples has a COM Register function with missing codebase entry(win32 registry) ...the problem is only affected to c# examples. fixed in latest source code. NetOffice\ReleaseTags\NetOffice Release 0.8.rar Includes: - Runtime Binaries and Source Code for .NET Framework:......v2.0, v3.0, v3.5, v4.0 - Tutorials in C# and VB.Net:...................Facebook Graph Toolkit: Facebook Graph Toolkit 1.5.4186: Updates the API in response to Facebook's recent change of policy: All Graph Api accessing feeds or posts must provide a AccessToken.Serviio for Windows Home Server: Beta Release 0.5.2.0: Ready for widespread beta. Synchronized build number to Serviio version to avoid confusion.AcDown????? - Anime&Comic Downloader: AcDown????? v3.0 Beta4: ??AcDown?????????????,??????????????,????、????。?????Acfun????? ????32??64? Windows XP/Vista/7 ????????????? ??:????????Windows XP???,?????????.NET Framework 2.0???(x86)?.NET Framework 2.0???(x64),?????"?????????"??? ??v3.0 Beta4 2011-5-31?? ???Bilibili.us????? ???? ?? ???"????" ???Bilibili.us??? ??????? ?? ??????? ?? ???????? ?? ?? ???Bilibili.us?????(??????????????????) ??????(6.cn)?????(????) ?? ?????Acfun?????????? ?????????????? ???QQ???????? ????????????Discussion...CodeCopy Auto Code Converter: Code Copy v0.1: Full add-in, setup project source code and setup fileTerrariViewer: TerrariViewer v2.4.1: Added Piggy Bank editor and fixed some minor bugs.Kooboo CMS: Kooboo CMS 3.02: Updated the Kooboo_CMS.zip at 2011-06-02 11:44 GMT 1.Fixed: Adding data rule issue on page. 2.Fixed: Caching issue for higher performance. Updated the Kooboo_CMS.zip at 2011-06-01 10:00 GMT 1. Fixed the published package throwed a compile error under WebSite mode. 2. Fixed the ContentHelper.NewMediaFolderObject return TextFolder issue. 3. Shorten the name of ContentHelper API. NewMediaFolderObject=>MediaFolder, NewTextFolderObject=> TextFolder, NewSchemaObject=>Schema. Also update the C...mojoPortal: 2.3.6.6: see release notes on mojoportal.com http://www.mojoportal.com/mojoportal-2366-released Note that we have separate deployment packages for .NET 3.5 and .NET 4.0 The deployment package downloads on this page are pre-compiled and ready for production deployment, they contain no C# source code. To download the source code see the Source Code Tab I recommend getting the latest source code using TortoiseHG, you can get the source code corresponding to this release here.New ProjectsCampaign Portfolio Manager: This is a light-weight organizer for GMs and Players of Table-Top RPGs. It allows quick access to basic notes regarding PCs, NPCs, and planned Stories. Written in C#eMarketplace: eMarketPlace is a website project for buyer and sellers for marketing any type of goodsEstudo de Realidade Aumentada usando Balder: Estudo de Realidade Aumentada usando desenhos 3D e Processamento de Imagem.Hex Vitals Calculator: Hex Vitals will help game masters understand their hex maps better. If you have one of seven measurements for a hex, you can use it to derive the other six. This program was written in C#.Internet Programming with Asp.NET 4: This project based on lesson in my college , Ma Chung University which is located at Malang, Indonesia. We (team = 2person) created this with Microsoft Visual Studio 2010 ( Visual Basic.NET). This project site about cooking club (www.hostingmm.com) at my university.kekkoooLibs: my tests.Moira Project: Moira project is a configurable, extensible and pluggable software for file management. Its core is a component that watches the file system and is capable of running different tasks based on files properties analysis. OOP: OOP is a C++ framework, which provides many utilities to make easier for C++ programmers to develop C++ programOsProject: this project is a sample of company routine to call technical. PowerShell Patch Audit/Installation GUI: PoshPAIG allows you to easily audit and install patches on your servers in the network by providing a graphical interface to select which servers to audit/install and to generate reports for the systems.RiordanWebSite: ??web??SelvinListSyncSample: My sample for Microsoft Sync Framework 4.0 CTP on Android deviceSharePoint 2010 XML Managed Metadata Migrator: The SP2010 Managed Metadata Migrator allows the export of a metadata service configuration from a source SP2010 farm, then re-import into a target SP2010 farm with options to re-associate your content type definitions with the defined term sets. Developed in C#SharePoint Foundation QueryString Filter WebPart: SharePoint foundation web part to provide out of the box components the capability to filter information based on a url querystring parameterSitePounder: Send infinite requests to specified URL target; join with others to wage distributed denial of service attacks against the deserving and overly self-serving.Snaky: A Simple Snake Game in C++ using SFML 2.0SOL Polar Explorer: A performance polar viewer and data explorer for sailonline.org polar files.SPEventReceiverWebpart: A SharePoint Webpart which allows you to add or delete EventReceivers to or from Lists in the current web.VS.NET Deployment Project Updater: VDProjectUpdater is a command line utility that will update a VS.NET setup project (vdproj) version and product/package/upgrade/module identifiers. This allows the setup projects to be integrated into automated builds that generate versioned setup outputs.?????? For Silverlight 5: ?????Silverlight ?RIA Service ???????????,??????EsaySL???,????????????,??????Silverlight

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  • Configuring 12voip with a sip softphone in Ubuntu

    - by Joey
    I want to change my work PC to Ubuntu but one thing is in my way... We use 12voip since we didn't find lower calling rates in Europe. The thing is 12voip doesn't have a Linux program :-(. I tried to set it up with instructions from this page (under 'Software configuration') with almost all clients that the software center of Ubuntu offers, but the best results i got to had a lot of echo. Now i must admit this echo exists also with the Windows version of the program, but there- once you use headphones its gone, while on the Ubuntu sip phones it stays and its worst in general. I don't know if my problem has to do with codecs or something else, and i was hoping someone can help check it and tell me which sip phone i can work with, and instructions on how to configure it correctly. Btw i tried Google, and all i could find were questions like mine or similar, no good answers. Thanks!

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  • Bloggers Behaving Badly

    - by andyleonard
    Introduction The other morning I awoke and said to myself, "Self, you need a million bucks." After breakfast, I waltzed down to the local bank. I slipped into the vault and managed to grab a million bucks while no one was paying attention. Quietly, I slipped out of the vault and made it home with the money. My logic? The money was there for the taking, as evidenced by my ability to go and take it. I plan to donate some of the money to charity. Worst-case: If the bank wants the money back, they'll...(read more)

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  • Semi-blocking Transformations in SQL Server Integration Services SSIS

    In a SSIS data flow, there are multiple types of transformations. On one hand you have synchronous and asynchronous transformations, but on the other hand you have non-blocking, semi-blocking and fully-blocking components. In this tip, Koen Verbeeck takes a closer look on the performance impact of semi-blocking transformations in SSIS. Can 41,000 DBAs really be wrong? Join 41,000 other DBAs who are following the new series from the DBA Team: the 5 Worst Days in a DBA’s Life. Part 3, As Corrupt As It Gets, is out now – read it here.

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  • Exposing business logic as WCF service

    - by Oren Schwartz
    I'm working on a middle-tier project which encapsulates the business logic (uses a DAL layer, and serves a web application server [ASP.net]) of a product deployed in a LAN. The BL serves as a bunch of services and data objects that are invoked upon user action. At present times, the DAL acts as a separate application whereas the BL uses it, but is consumed by the web application as a DLL. Both the DAL and the web application are deployed on different servers inside organization, and since the BL DLL is consumed by the web application, it resides in the same server. The worst thing about exposing the BL as a DLL is that we lost track with what we expose. Deployment is not such a big issue since mostly, product versions are deployed together. Would you recommend migrating from DLL to WCF service? If so, why? Do you know anyone who had a similar experience?

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  • xna networking, dedicated server possible?

    - by Jake
    Hi I want to release my xna game to the XBOX platform, but I'm worried about the networking limitations. Basically, I want to have a dedicated (authoritative) server, but it sounds like that is not possible. Which is why I'm wondering about: a.) Using port 80 web calls to php-driven database b.) Using an xbox as a master-server (is that possible?) I like the sound of [b] , because I could write my own application to run on the xbox, and I would assume other users could connect to it similar to the p2p architecture. Anyone able to expand on theory [b] above? or [a] as worst-case scenario?

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  • How Do I interpret HDD S.M.A.R.T Results?

    - by Marty
    My laptop has recently started to become a bit unreliable, and for some reason I started to suspect that my HDD was starting to fail. After a bit of hunting on the internet, I found Ubuntu's Disk Utility in the System menu and ran the long SMART diagnostics from this. However, since the documentation for Disk Utility is very poor (palimpsest?), I'm not sure how to interpret the results: For example, the Read Error Rate is over 50 million (!), yet the Assessment is rated "Good". So would someone mind explaining to me how to interpret the results of these tests (especially the Normalized, Worst, Threshold and Value numbers)? And maybe tell me what they think of the results I got for my HDD? (Thanks)

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