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  • Finding Database issue for iphone app

    - by David Liu
    I know this is a dumb question and it might not be "conceptual" but, as a self-starter I really want to know how to get connected to some sort of "commercial database"? I'm recently designing my local gas station utility app for iphone and ipad. I have absolutely no clue of find a relevant database. For example, if I want to make an app for pizza ordering in the great Chicago area. How do I get info (price, menu, location, etc.) of those pizza stores scattered all over Chicago? Can any one light something for me? I appreciated your help. **If this question is not suitable here please tell me and I will delete this post. Thank you.

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  • Map of the Dead Helps You Plan For a Zombie Apocalypse

    - by Jason Fitzpatrick
    There’s no time like the present to start charting out your zombie apocalypse escape route. Map of the Dead highlights key locations–like gun stores, gas stations, and pharmacies–in your immediate area. The key to surviving the zombie horde is fast access to supplies. Unless you have a bunker under your house filled with goodies, you’ll need more fuel, ammo, and medical supplies–Map of the Dead makes it easy to see where the goods are in your locale. Make sure to mouse over the map key for some entertaining commentary. Map of the Dead [via Neatorama] The Best Free Portable Apps for Your Flash Drive Toolkit How to Own Your Own Website (Even If You Can’t Build One) Pt 3 How to Sync Your Media Across Your Entire House with XBMC

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  • Addicted to Oil

    30 years ago, Brazil imported 80% of its oil. With a strong sense of purpose, Brazil invested heavily in bio-fuel technology and refocused its transportation energy towards a resource Brazil could manufacture internallysugar based ethanol. Today, Brazil uses flexible fuel vehicles that can run on gas, ethanol, or any combination of the two. It still has a mandate to be 100% independent of oil in 2011. Yes, Brazil still drills for oil, and they still use it - plenty of it. But at least they've had...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Valentine's Day in sunny Ottawa, Ontario

    - by Roy F. Swonger
    Birds may fly south for the winter, but I will be heading to Ottawa, Ontario next week for a workshop on 15-FEB. I'm pretty used to winter because I grew up in the snow belt southeast of Buffalo, NY -- and this winter in New England is helping me get prepared as well. For reference, the big lump is my gas grill. Anyway, I'm looking forward to a good workshop and to visiting Ottawa for my first time. If you're in the Ottawa/Gatineau area and would like to attend, please contact your account team for more information.

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  • links for 2011-02-11

    - by Bob Rhubart
    New Versions of Whitepapers are available (The Shorten Spot) Anthony Shorten shares the details on several recently updated Updated Oracle Utilities Application Framework white papers. (tags: oracle otn whitepapers) Energy Firms Targetted for Sensitive Documents (Oracle IRM, the official blog) Numerous multinational energy companies have been targeted by hackers who have been focusing on financial documents related to oil and gas field exploration, bidding contracts, and drilling rights, as well as proprietary industrial process documents, according to a new McAfee report. (tags: oracle otn security) Get Your Workshop Hands On! New Developer Day Cities & Dates (Oracle Technology Network Blog (aka TechBlog)) Oracle Technology Network's Justin Kestelyn share information on upcoming OTN Developer days. (tags: oracle otn events)

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  • Nominations for Oracle's Eco-Enterprise Innovation Awards- Due July 17, 2012

    - by swalker
    Are you working with a customer that is using any of Oracle's products to reduce their environmental footprint while improving their operational efficiency? Reducing energy usage? Reducing gas usage? Going paperless? Both you and your customer may be eligible for Oracle's Eco-Enterprise Innovation Award, part of the Oracle Excellence awards. Get more details and submit a nomination form here by July 17. These awards will be presented during Oracle OpenWorld by Jeff Henley, Oracle Chairman of the Board, in a special conference session. Winning customers will receive a free Oracle OpenWorld registration pass.

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  • How Uranium Refinement Works [Video]

    - by Jason Fitzpatrick
    While building a nuclear weapon is a complex task in and of itself, the most difficult part is refining uranium. In this informative video, Bill Hammack explains. Weapons and power plants require uranium that contains a greater amount of the isotope uranium-235 than found in natural uranium, which is mostly uranium-238. He outlines the key difficulty in separating the two isotope: They have nearly identical properties. He explains the two key methods for separation: Gas diffusion and centrifuges. What Keeps Nuclear Weapons from Proliferating HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux

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  • Serial port game controller (racing pedals)

    - by Cheesegraterr
    I have an old madCatz racing wheel for the playstation 2. The gas and brake pedals are connected to the wheel by a serial port. I just bought a usb racing wheel for the PC but it lacks pedals so I wanted to see if I could get these old madCatz working. I just installed the serial port in my motherboard, but now I have a problem with software. Nothing will recognize the pedal. I was wondering if there are any programs or drivers out there that will allow me to set the pedals up to work. Any advice would be appreciated!

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  • Envista: Coordinating Utilities with Oracle Spatial 11g

    - by stephen.garth
    It's annoying when the same streets seem to be perpetually dug up for utility construction or maintenance by your water or sewer department, electric utility, gas company or telephone company. Can't they do a better job of coordinating these activities? In this podcast, Marc Fagan, Executive VP of Product Management from Envista describes a Software-as-a-Service solution that Envista provides for utilities and public works departments to coordinate upcoming construction work, using Oracle Database 11g with Oracle Spatial. Each participating utility enters key data into the Web-based application, including when and where their work is to take place, and who to contact for more information. The data is then available on a common base map, enabling all participants to coordinate their activities, save money, and minimize inconvenience to their customers. Listen to the podcast Find out more about Oracle Spatial 11g var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • The Earth at Night [Video]

    - by Jason Fitzpatrick
    This fresh video from NASA provides the clearest view of the Earth at night ever seen, thanks to the Suomi National Polar-orbiting Partnership Satellite. Check out the video and accompanying pics to see the stunning views. In daylight our big blue marble is all land, oceans and clouds. But the night – is electric. This view of Earth at night is a cloud-free view from space as acquired by the Suomi National Polar-orbiting Partnership Satellite (Suomi NPP). A joint program by NASA and NOAA, Suomi NPP captured this nighttime image by the satellite’s Visible Infrared Imaging Radiometer Suite (VIIRS). The day-night band on VIIRS detects light in a range of wavelengths from green to near infrared and uses filtering techniques to observe signals such as city lights, gas flares, and wildfires. This new image is a composite of data acquired over nine days in April and thirteen days in October 2012. It took 312 satellite orbits and 2.5 terabytes of data to get a clear shot of every parcel of land surface. This video uses the Earth at night view created by NASA’s Earth Observatory with data processed by NOAA’s National Geophysical Data Center and combined with a version of the Earth Observatory’s Blue Marble: Next Generation. Hit up the link below for the full NASA press release, including more videos and photos. How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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  • Booby Traps and Locked-in Kids: An Interview with a Safecracker

    - by Jason Fitzpatrick
    While most of our articles focus on security of the digital sort, this interview with a professional safecracker is an interesting look the physical side of securing your goods. As part of their Interviews with People Who Have Interesting or Unusual Jobs series over at McSweeney’s, they interviewed Ken Doyle, a professional a locksmithing and safecracking veteran with 30 years of industry experience. The interview is both entertaining and an interesting read. One of the more unusual aspects of safecracking he highlights: Q: Do you ever look inside? A: I NEVER look. It’s none of my business. Involving yourself in people’s private affairs can lead to being subpoenaed in a lawsuit or criminal trial. Besides, I’d prefer not knowing about a client’s drug stash, personal porn, or belly button lint collection. When I’m done I gather my tools and walk to the truck to write my invoice. Sometimes I’m out of the room before they open it. I don’t want to be nearby if there is a booby trap. Q: Why would there be a booby trap? A: The safe owner intentionally uses trip mechanisms, explosives or tear gas devices to “deter” unauthorized entry into his safe. It’s pretty stupid because I have yet to see any signs warning a would-be culprit about the danger. HTG Explains: Why Linux Doesn’t Need Defragmenting How to Convert News Feeds to Ebooks with Calibre How To Customize Your Wallpaper with Google Image Searches, RSS Feeds, and More

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  • IoT end-to-end demo – Remote Monitoring and Service By Harish Doddala

    - by JuergenKress
    Historically, data was generated from predictable sources, stored in storage systems and accessed for further processing. This data was correlated, filtered and analyzed to derive insights and/or drive well constructed processes. There was little ambiguity in the kinds of data, the sources it would originate from and the routes that it would follow. Internet of Things (IoT) creates many opportunities to extract value from data that result in significant improvements across industries such as Automotive, Industrial Manufacturing, Smart Utilities, Oil and Gas, High Tech and Professional Services, etc. This demo showcases how the health of remotely deployed machinery can be monitored to illustrate how data coming from devices can be analyzed in real-time, integrated with back-end systems and visualized to initiate action as may be necessary. Use-case: Remote Service and Maintenance Critical machinery once deployed on the field, is expected to work with minimal failures, while delivering high performance and reliability. In typical remote monitoring and industrial automation scenarios, although many physical objects from machinery to equipment may already be “smart and connected,” they are typically operated in a standalone fashion and not integrated into existing business processes. IoT adds an interesting dynamic to remote monitoring in industrial automation solutions in that it allows equipment to be monitored, upgraded, maintained and serviced in ways not possible before. Read the complete article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Technorati Tags: IoT,Iot demo,sales,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • Optimierter Workflow durch neues Geo-Datawarehouse: Ein Erfolgsprojekt für die LINZ AG – von CISS TDI und Primebird

    - by A&C Redaktion
    Zufriedene Kunden sind die beste Marketingstrategie. Deshalb bieten wir spezialisierten Partnern die Möglichkeit, professionelle Anwenderberichte über eigene erfolgreiche Oracle Projekte erstellen zu lassen. Hier im Blog präsentieren wir Ihnen in loser Folge Referenzberichte, mit denen Partner bereits erfolgreich werben. Heute: Die Oracle Partner CISS TDI, PRIMEBIRD und deren gemeinsames Großprojekt für die LINZ AGDie österreichische LINZ AG ist als Energieversorgungsunternehmen unter anderem für Strom, Gas und Fernwärme, das Wasser- und Kanalsystem sowie den öffentlichen Personennahverkehr zuständig. Seit Jahren schon nutzt sie zur Verwaltung ihrer stetig wachsenden Geodaten-Bestände Oracle Lösungen. 2012 nun haben die Oracle Partner CISS TDI und PRIMEBIRD die bisherige Oracle Lösung zu einem “Geo-Datawarehouse” ausgebaut und das Datenmodell für die Internet-Planauskunft optimiert. Das neue Datawarehouse stellt die geografischen Datenbestände der LINZ AG in einheitlicher Struktur dar und ermöglicht so eine deutliche Workflow-Optimierung. Die Voreile: der administrative Aufwand wurde reduziert, der Prozess der Datensammlung vereinheitlicht und der notwendige Datenexport, etwa an Bauträger oder die Kommune, läuft mit der neuen Web-Anwendung reibungslos. Details zum genauen Projektverlauf, den spezifischen Anforderungen bei Geodaten und zur Zusammenarbeit zwischen der Linz AG, CISS TDI und PRIMEBIRD finden Sie hier im Anwenderbericht Linz AG.Die Möglichkeit, sich und ihre Arbeit gewinnbringend zu präsentieren, können alle spezialisierten Partner nutzen, die ein repräsentatives Oracle Projekt abgeschlossen haben. Erfahrene Fachjournalisten interviewen dann sowohl Partner als auch Endkunde und erstellen einen ausführlichen, ansprechend aufbereiteten Bericht. Die Veröffentlichung erfolgt über verschiedene Marketing-Kanäle. Natürlich können die Partner die Anwenderberichte auch für eigene Marketingzwecke nutzen, z. B. für Veranstaltungen.Haben Sie Interesse? Dann wenden Sie sich an Frau Marion Aschenbrenner. Wir benötigen von Ihnen einige Eckdaten wie Kundenname, Ansprechpartner und eingesetzte Oracle Produkte, eine Beschreibung des Projektes in 3-4 Sätzen und Ihren Ansprechpartner im Haus. Und dann: Lassen Sie Ihre gute Arbeit für sich sprechen!

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  • Optimierter Workflow durch neues Geo-Datawarehouse: Ein Erfolgsprojekt für die LINZ AG – von CISS TDI und Primebird

    - by A&C Redaktion
    Zufriedene Kunden sind die beste Marketingstrategie. Deshalb bieten wir spezialisierten Partnern die Möglichkeit, professionelle Anwenderberichte über eigene erfolgreiche Oracle Projekte erstellen zu lassen. Hier im Blog präsentieren wir Ihnen in loser Folge Referenzberichte, mit denen Partner bereits erfolgreich werben. Heute: Die Oracle Partner CISS TDI, PRIMEBIRD und deren gemeinsames Großprojekt für die LINZ AGDie österreichische LINZ AG ist als Energieversorgungsunternehmen unter anderem für Strom, Gas und Fernwärme, das Wasser- und Kanalsystem sowie den öffentlichen Personennahverkehr zuständig. Seit Jahren schon nutzt sie zur Verwaltung ihrer stetig wachsenden Geodaten-Bestände Oracle Lösungen. 2012 nun haben die Oracle Partner CISS TDI und PRIMEBIRD die bisherige Oracle Lösung zu einem “Geo-Datawarehouse” ausgebaut und das Datenmodell für die Internet-Planauskunft optimiert. Das neue Datawarehouse stellt die geografischen Datenbestände der LINZ AG in einheitlicher Struktur dar und ermöglicht so eine deutliche Workflow-Optimierung. Die Voreile: der administrative Aufwand wurde reduziert, der Prozess der Datensammlung vereinheitlicht und der notwendige Datenexport, etwa an Bauträger oder die Kommune, läuft mit der neuen Web-Anwendung reibungslos. Details zum genauen Projektverlauf, den spezifischen Anforderungen bei Geodaten und zur Zusammenarbeit zwischen der Linz AG, CISS TDI und PRIMEBIRD finden Sie hier im Anwenderbericht Linz AG.Die Möglichkeit, sich und ihre Arbeit gewinnbringend zu präsentieren, können alle spezialisierten Partner nutzen, die ein repräsentatives Oracle Projekt abgeschlossen haben. Erfahrene Fachjournalisten interviewen dann sowohl Partner als auch Endkunde und erstellen einen ausführlichen, ansprechend aufbereiteten Bericht. Die Veröffentlichung erfolgt über verschiedene Marketing-Kanäle. Natürlich können die Partner die Anwenderberichte auch für eigene Marketingzwecke nutzen, z. B. für Veranstaltungen.Haben Sie Interesse? Dann wenden Sie sich an Frau Marion Aschenbrenner. Wir benötigen von Ihnen einige Eckdaten wie Kundenname, Ansprechpartner und eingesetzte Oracle Produkte, eine Beschreibung des Projektes in 3-4 Sätzen und Ihren Ansprechpartner im Haus. Und dann: Lassen Sie Ihre gute Arbeit für sich sprechen!

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  • Geek Chess: Nixie Tubes as Board Pieces [Video]

    - by Jason Fitzpatrick
    We’ve seen some geeky chessboards in our day, but this board is a masterpiece of geekiness. Check out the video to see the Nixie tubes in action. Courtesy of a tinker named Tony, we find this delightfully analog and geeky chess set. He writes: This developed as a spinoff from the hardware and controllers I’m designing for a range of nixie clocks and watches as a ‘simple’ project that wouldn’t need much software to complete it. All visible parts are made from materials contemporary with Nixie technology and no modern plastics or resins are used anywhere in its’ consruction (other than the electronic components and PCBs). The board and pieces are machined from phenolic resin laminate and assembled using brass fittings. The brown base pieces have been filled and wiped with gold and silver engravers wax, giving a ‘worn gilding’ appearance. The displays are ex-Soviet Nixie gas display tubes, manufactured in the early 1980s. No Chinese LEDs here… How to Banish Duplicate Photos with VisiPic How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It?

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  • DIY Carbonator Creates Pop Rocks Like Fizzy Fruit [Science]

    - by Jason Fitzpatrick
    If you’ve ever sat around wishing that scientists would stop wasting time trying to solve pressing global problems and instead genetically engineer a bizarre but delicious hybrid of Pop Rocks candy and wholesome fruit, this mad scientist experiment is for you. Over at Evil Mad Scientist Laboratories they share a really fun weekend project. Contributor Rich Faulhaber was looking for a way to make eating fruit extra fun and science-infused for his kids. His solution? Build a homemade carbon dioxide injector that infuses fruit with carbonation. Having trouble imagining that? Envision a bowl of strawberries where every strawberry burst into a crazy flurry of strawberry flavor and champagne bubbles every time you bit into it. Fizzy fruit! Hit up the link below to see how he took pretty common parts: a C02 tank from a paint ball gun, a water filter canister from the hardware store, and other cheap and readily available parts (with the exception of the gas regulator which he suggests you shop garage sales and surplus stores to find a deal on), and combined them together to create a C02 fruit infuser. Hit up the link below to read more about his setup and the procedure he uses to infuse fruit with carbonation. The C02inator [Evil Mad Scientist Laboratories via Hack a Day] HTG Explains: What Are Character Encodings and How Do They Differ?How To Make Disposable Sleeves for Your In-Ear MonitorsMacs Don’t Make You Creative! So Why Do Artists Really Love Apple?

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  • Drive project success & financial performance with business critical Enterprise Project Portfolio Management

    - by Sylvie MacKenzie, PMP
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} Oracle Primavera invites you to the first in a series of three webcasts linking Enterprise Project Portfolio Management with enhanced operational performance and better financial results. Few organizations fully understand the impact projects have on their business. Consistently delivering successful projects is vital to the financial success of an asset intensive organization. Enterprise Project Portfolio Management (EPPM) is not a new concept yet for many organizations it is not considered "business critical". Webcast 1: Plan – Aligning project selection and prioritization with corporate objectives This webcast will look at 2 key questions: Are you aligning portfolio decisions with strategic objectives? How do you effectively measure the success of your portfolio decisions? Hear from Accenture who'll present a compelling case for why asset intensive organizations should consider EPPM as business critical. They'll explore: How technology is being used to enhance project delivery How collaboration enhances delivery performance The major challenges associated with the planning phase of a project Next hear from Geoff Roberts, Industry Strategist from Oracle Primavera. With over 30 years experience in project management/project controls in the construction, utilities and oil & gas sectors, Geoff will investigate how EPPM is a best practice and can support an organization through project selection and prioritization ensuring that decisions are aligned with corporate objectives. Don’t miss out, register today!

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  • Energy Firms Targetted for Sensitive Documents

    - by martin.abrahams
    Numerous multinational energy companies have been targeted by hackers who have been focusing on financial documents related to oil and gas field exploration, bidding contracts, and drilling rights, as well as proprietary industrial process documents, according to a new McAfee report. "It ... speaks to quite a sad state of our critical infrastructure security. These were not sophisticated attacks ... yet they were very successful in achieving their goals," said Dmitri Alperovitch, McAfee's vice president for threat research. Apparently, the attacks can be traced back over several years, creating a sustained security compromise that has provided access to highly sensitive information that is of huge financial value to competitors. The value of IRM as an additional layer of protection is clear. Whether your infrastructure security is in a sad state or is state of the art, breaches are always a possibility - and in any case, a lot of sensitive information is shared with third parties whose infrastructure security might not be as good as yours. IRM protects the individual information assets directly so that, even if infrastructure security is compromised, your critical information is enrypted and trackable and only accessible to authenticated, authorised, audited users. The full McAfee report is available here.

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  • Prevent oversteering catastrophe in racing games

    - by jdm
    When playing GTA III on Android I noticed something that has been annoying me in almost every racing game I've played (maybe except Mario Kart): Driving straight ahead is easy, but curves are really hard. When I switch lanes or pass somebody, the car starts swiveling back and forth, and any attempt to correct it makes it only worse. The only thing I can do is to hit the brakes. I think this is some kind of oversteering. What makes it so irritating is that it never happens to me in real life (thank god :-)), so 90% of the games with vehicles inside feel unreal to me (despite probably having really good physics engines). I've talked to a couple of people about this, and it seems either you 'get' racing games, or you don't. With a lot of practice, I did manage to get semi-good at some games (e.g. from the Need for Speed series), by driving very cautiously, braking a lot (and usually getting a cramp in my fingers). What can you do as a game developer to prevent the oversteering resonance catastrophe, and make driving feel right? (For a casual racing game, that doesn't strive for 100% realistic physics) I also wonder what games like Super Mario Kart exactly do differently so that they don't have so much oversteering? I guess one problem is that if you play with a keyboard or a touchscreen (but not wheels and pedals), you only have digital input: gas pressed or not, steering left/right or not, and it's much harder to steer appropriately for a given speed. The other thing is that you probably don't have a good sense of speed, and drive much faster than you would (safely) in reality. From the top of my head, one solution might be to vary the steering response with speed.

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  • jQuery 2.0 drops support for legacy IE (IE6, IE7, IE8)

    - by Renso
    Originally posted on: http://geekswithblogs.net/renso/archive/2013/10/31/jquery-2.0-drops-support-for-legacy-ie-ie6-ie7-ie8.aspxjQuery upgrades may not be as reverse compatible as you may think. Starting from version 2 of jQuery, IE6, IE7 and yes also IE8 will no longer be supported. These are now considered legacy browsers. You will need to stop any upgrades to jQuery until your SLA states that IE8 is no longer supported and remain in jQuery 1.9.Some of the reasons for not supporting IE8 and before:- Remove all the code clutter in the jQuery library with code that has to deal with IE browser compatibility issues between IE6, 7 and 8 and the newer IE versions, the latter being more compliant.- IE6 and 7 may have fallen to below 2% generally, that does not mean that that is true for your client base. In the oil and gas industry some clients are years behind and you may have 50% or more of clients remain on IE8 or older for the foreseeable future.- The difference between browser engines has become almost negligible, as it should be. So one of the greatest goals of jQuery to abstract that out for developers is no longer needed, for most part anyway. - CSS3 features like animations basically replace the need for jQuery’s 2.0 animations and effects.If the need is still there to support IE8 or before, but you also want to upgrade, then use conditional comments:<!--[if lt IE 9]>    <script src="jQuery-1.9.0.js"></script><![endif]--><!--[if gte IE 9]><!-->    <script src="jQuery-2.0.0.js"><</script><!--<![endif]-->

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  • 2D colliding n-body simulation (fast Collision Detection for large number of balls)

    - by osgx
    Hello I want to write a program for simulating a motion of high number (N = 1000 - 10^5 and more) of bodies (circles) on 2D plane. All bodies have equal size and the only force between them is elastic collision. I want to get something like but in larger scale, with more balls and more dense filling of the plane (not a gas model as here, but smth like boiling water model). So I want a fast method of detection that ball number i does have any other ball on its path within 2*radius+V*delta_t distance. I don't want to do a full search of collision with N balls for each of i ball. (This search will be N^2.) PS Sorry for loop-animated GIF. Just press Esc to stop it. (Will not work in Chrome).

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  • How to structure a Genetic Algorithm class hierarchy?

    - by MahlerFive
    I'm doing some work with Genetic Algorithms and want to write my own GA classes. Since a GA can have different ways of doing selection, mutation, cross-over, generating an initial population, calculating fitness, and terminating the algorithm, I need a way to plug in different combinations of these. My initial approach was to have an abstract class that had all of these methods defined as pure virtual, and any concrete class would have to implement them. If I want to try out two GAs that are the same but with different cross-over methods for example, I would have to make an abstract class that inherits from GeneticAlgorithm and implements all the methods except the cross-over method, then two concrete classes that inherit from this class and only implement the cross-over method. The downside to this is that every time I want to swap out a method or two to try out something new I have to make one or more new classes. Is there another approach that might apply better to this problem?

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  • What are the things I use every day programmed with?

    - by sub
    It isn't so interesting to find out what this text editor here or that IRC client there was programmed with, also it isn't really hard and neither are there really suprising things to come out. Wow so it was programmed in Python, I didn't expect that. What I'm asking is: What are the things that we daily see, use or generally need programmed with? To name a few (really only a few of those out there): My alarm clock It has many features so it would probably be hard programming it with assembler or whatever, so did they probably use a programming language? If yes, which? My electrical tooth brush The (stupid) board computer of my car. (6 years old, has few features but a red LED display showing me how cold/warm it is outside and how much gas I'm using up per hour at the moment) Those (old) plastic mini-mini computers with the LCD(?) displays that only had one game available on them: PacMan, tetris or so. I'm not directly thinking of this but it may be similar: Other, probably more interesting, things I didn't mention

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  • Google Analytics - async tracking with two accounts

    - by MatW
    I'm currently testing GAs new async code snippet using two different tracking codes on the same page; _gaq.push( ['_setAccount', 'UA-XXXXXXXX-1'], ['_trackPageview'], ['b._setAccount', 'UA-XXXXXXXX-2'], ['b._trackPageview'] ); Although both codes work, I've noticed that they present inconsistent results. Now, we aren't talking huge differences here, only 1 or 2 visits / day every now and then. However, this site is tiny and 1 or 2 visits equates to a 15% difference in figures. Now, the final site has much more traffic, but my concerns are; will this inconsistancy scale with traffic? assuming not, is a slight variation in recorded stats an accepted norm?

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  • Improved Genetic algorithm for multiknapsack problem

    - by user347918
    Hello guys, Recently i've been improving traditional genetic algorithm for multiknapsack problem. So My Improved Genetic Algorithm is working better then Traditional Genetic Algorithm. I tested. (i used publically available from OR-Library (http://people.brunel.ac.uk/~mastjjb/jeb/orlib/mknapinfo.html) were used to test the GAs.) Does anybody know other improved GA. I wanted to compare with other improved genetic algorithm. Actually i searched in internet. But couldn't find good algorithm to compare.

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