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• What operating systems are used in airplanes, and what programming languages are they developed in?

  - by adhg

  I was wondering if anyone knows what is the operating system used in commercial airplanes (say Boeing or Airbus). Also, what is the (preferred) real-time programing language? I heard that Ada is used in Boeing, so my question is - why Ada? what are the criteria the Boeing-guys had to choose this language? (I guess Java wouldn't be a great choice if the exactly in lift off the garbage collector wakes up).

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• Logging every time a command is run

  - by Tom D

  I want to log every time I run a certain type of command in the terminal. For example, every time I run: sudo apt-get install [something] I want to add [something] to a log file in my home directory that will look like the following: [timestamp] [something] 2012-10-02 mysql-server 2012-10-03 ruby1.9.1 2012-10-06 gedit-plugins 2012-10-07 gnome-panel synaptic What's the easiest way to make this happen automatically?

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• How to make a PHP function triggered automatically at a user defined time

  - by mithilatw

  I am developing an internal system for a company with PHP using Zend framework. I need one of its functions to execute on a time specified by user. My research on this matter found me several ways of doing this using CPanel Cron jobs and setting up scheduled tasks on the server. But in this scenario, I don't have a CPanel and I already use scheduled tasks. But my challenge is to provide an interface for the user to specify the time to trigger the function.

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• Will KeywordSpy Really Save You Time?

  Trying to find the best keywords for your projects has proven to be one of the most tedious chores related to Internet marketing. The object of the keyword is to make sure that people who are searching your product will stay on track. These are what allow people to come across your website. If you do not have much free time and are too busy, locating the right keyword can be a difficult as well as time consuming task.

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• Today Will Be 11/11/11 – 11:11:11 for the First Time in 100 Years

  - by The Geek

  Today at 11:11 and 11 seconds, the date and time will be a perfect same-number palindrome—that is, it will read the same backwards and forwards, using the same number. It will be 11:11:11 on 11/11/11, and that won’t happen again for another 100 years. Naturally, it’ll happen again at 11 PM, for those that don’t observe military time. Use Amazon’s Barcode Scanner to Easily Buy Anything from Your Phone How To Migrate Windows 7 to a Solid State Drive Follow How-To Geek on Google+

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• Real Time Search and Applications

  Several companies want to improve their real time search practice. The most popular search engine Google also has plans to improvise on this area and has launched a real time search. But what exactly does this buzzword mean?

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• No Time for IT? Try Managed Services

  If maintaining your small business computer systems is a drag on your time and psyche, consider IT outsourcing. It frees up time, delivers better results, and a recent study shows it&#146;s more affordable than you might think.

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• No Time for IT? Try Managed Services

  If maintaining your small business computer systems is a drag on your time and psyche, consider IT outsourcing. It frees up time, delivers better results, and a recent study shows it&#146;s more affordable than you might think.

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• No Time for IT? Try Managed Services

  If maintaining your small business computer systems is a drag on your time and psyche, consider IT outsourcing. It frees up time, delivers better results, and a recent study shows it&#146;s more affordable than you might think.

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• How to show time in Ubuntu 13.10 [duplicate]

  - by Paté

  This question already has an answer here: Missing date & time applet from top Unity panel 8 answers Just upgraded from 13.04 to 13.10. Everything went fine but I don't see the time in the top right corner of the 'top bar' anymore. I tried to right click on it so I could get some options but nothings shows. I'm sure it's obvious but I don't see it.

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• How detailed should your report/invoice be for hourly work? [on hold]

  - by Marcus Cavanaugh

  When working on development projects (like an iPhone app for a client), how detailed should your reports be when providing an invoice? In other words, how specific should you be regarding the particular development tasks you were working on at a given time? Just as helpful would be a short example of what one of your invoices looks like, with sample times and tasks that you would typically include.

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• Do I need to use any other attributes other than CssClassProperty to enabled design-time support?

  - by keith

  Hi, I'm trying to provide the same design-time support that the CssClass provides on some custom properties of a server control. The documentation suggests that decorating the property with the CssClassProperty is all that's required. [CssClassProperty] public string SomeOtherCssClass{get;set;} This has no effect, in vs2008 or vs2010. I've looked at the WebControl class using reflector and implemented all the attributes, and every combination thereof, to my property and still no class dropdown. Some blog posts suggest that the use of the Editor attribute but a) there's not mention of it in the documentation and b) none of editors which are remotely related to css classes have any effect either. Am I missing something to enable this feature? Thanks in advance, Keith.

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• How do I set up one time password authentication?

  - by scraimer

  I have a home network which I access remotely quite a bit. But I'm worried about security. While I do have strong passwords, I'm worried that someone will acquire my password and use it to gain access. I heard about "one time passwords" and even got to use them at my university. We'd just press a button on a device (or run an application on a phone) and get a generated password that would work for the next minute or so. How can I set something like that up? Are there systems that are easy to use and set up? Has anyone played around with an SDK of one of these systems? Where can I get a starter kit from? EDIT: I'm running a mixed Linux and Windows network, and I'm vaguely hoping to use this for authenticating on both operating systems. (No, there's no domain controller, but I can set one up using Samba, I suppose.)

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• What one-time-password devices are compatible with mod_authn_otp?

  - by netvope

  mod_authn_otp is an Apache web server module for two-factor authentication using one-time passwords (OTP) generated via the HOTP/OATH algorithm defined in RFC 4226. The developer's has listed only one compatible device (the Authenex's A-Key 3600) on their website. If a device is fully compliant with the standard, and it allows you to recover the token ID, it should work. However, without testing, it's hard to tell whether a device is fully compliant. Have you ever tried other devices (software or hardware) with mod_authn_otp (or other open source server-side OTP program)? If yes, please share your experience :)

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• How to measure the time HTTP requests spend sitting in the accept-queue?

  - by David Jones

  I am using Apache2 on Ubuntu 9.10, and I am trying to tune my configuration for a web application to reduce latency of responses to HTTP requests. During a moderately heavy load on my small server, there are 24 apache2 processes handling requests. Additional requests get queued. Using "netstat", I see 24 connections are ESTABLISHED and 125 connections are TIME_WAIT. I am trying to figure out if that is considered a reasonable backlog. Most requests get serviced in a fraction of a second, so I am assuming requests move through the accept-queue fairly quickly, probably within 1 or 2 seconds, but I would like to be more certain. Can anyone recommend an easy way to measure the time an HTTP request sits in the accept-queue? The suggestions I have come across so far seem to start the clock after the apache2 worker accepts the connection. I'm trying to quantify the accept-queue delay before that. thanks in advance, David Jones

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• How can I avoid properties being reset at design-time in tightly bound user controls?

  - by David Anderson

  I have UserControl 'A' with a label, and this property: /// <summary> /// Gets or Sets the text of the control /// </summary> [ Browsable(true), EditorBrowsable(EditorBrowsableState.Always), Category("Appearance") ] public override string Text { get { return uxLabel.Text; } set { uxLabel.Text = value; } } I then have UserControl 'B' which has UserControl 'A' on it, and I set the Text Property to "My Example Label" in the designer. Then, I have my MainForm, which has UserControl 'B' on it. Each time I do a build or run, the Text property of UserControl 'A' is reset to its default value. I suppose this is because since I am doing a rebuild, it rebuilds both UserControl 'A' and 'B', thus causing the problem. How can I go about a better approach to design pattern to avoid this type of behavior when working with tightly bound controls and forms in a application?

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• How do you manage your time as a team leader?

  - by Bryan Slatner

  Where I work, my role has been evolving from a pure development role to team leadership. I find that this suits me, and I'm generally enjoying it. One aspect of the job that continually vexes me, though, is time management. My day used to be pure coding. Now, I still have a largely full plate of coding duties, but I'm expected to mentor other developers, work on requirements, make design decisions for other developers, evaluate bug reports from users, assign them to developers, and so on. I find that my day has become on interruption after another and the prolonged periods of sustained concentration needed to get any actual quality coding done are becoming rarer and rarer. Today, I finally grabbed my laptop and escaped to a coffee shop so I could get some actual work done. How do the team leads here manage their day -- or manage their workplace -- so they don't let their administrative tasks overwhelm them?

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• Coldfusion CFC creation taking a variable amout of time to execute.

  - by Bazza

  I've been doing some logging of object creation times in our open account process in production. Periodically, initializing an object would take way longer than expected. By initializing I mean calling it's init() and passing a couple of arguments that may be simple variables or objects. e.g. <cfset validateObj = createObject("component", "compExample").init( productionMode = VARIABLES.productionMode, ipWhiteListed = isWhiteListed, ipLocatorObj = VARIABLES.ipLocatorObj ) /> Thats all that happens in init() methods. Generally the execution time would be 0ms, but at random times I might get 3 or 3.5 seconds. This is not specific to one particular server or to our generally busy period. It appears to be quite random. One thought was that these templates were being evicted from our template cache as they are not especially frequently used, although I checked cfstat on a number of servers and the max CP/Sec is -1. Running CF 8,0,1 Has anybody else ever come across this?

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• OSGI bundle (or service)- how to register for a given time period?

  - by Alec

  Hello, all! Search did not give me a hint, how can i behave with the following situation: I'd love to have 2 OSGI implementations of the same interface: one is regular, the other should work (be active/present/whatever) on the given time period (f.e for Christmas weeks :)) The main goal is to call the same interface without specifying any flags/properties/without manual switching of ranking. Application should somehow switch implementation for this special period, doing another/regular job before and after :) I'm a newbie, maybe i do not completely understand OSGI concept somewhere, sorry for that of give me a hint or link, sorry for my English. Using Felix/Equinox with Apache Aries.

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• How do you calculate expanding mean on time series using pandas?

  - by mlo

  How would you create a column(s) in the below pandas DataFrame where the new columns are the expanding mean/median of 'val' for each 'Mod_ID_x'. Imagine this as if were time series data and 'ID' 1-2 was on Day 1 and 'ID' 3-4 was on Day 2. I have tried every way I could think of but just can't seem to get it right. left4 = pd.DataFrame({'ID': [1,2,3,4],'val': [10000, 25000, 20000, 40000],'Mod_ID': [15, 35, 15, 42], 'car': ['ford','honda', 'ford', 'lexus']}) right4 = pd.DataFrame({'ID': [3,1,2,4],'color': ['red', 'green', 'blue', 'grey'], 'wheel': ['4wheel','4wheel', '2wheel', '2wheel'], 'Mod_ID': [15, 15, 35, 42]}) df1 = pd.merge(left4, right4, on='ID').drop('Mod_ID_y', axis=1)

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• Best practices for storing & selecting time/date with php & mysql?

  - by Adam

  I often find myself storing data in a mysql database, and then wanting to display all sorts of stats about my data, specifically stuff like 'how many rows do I have for this date, or that date'. Does anyone know of (or could write) a good tutorial on this subject? Ideally a good tutorial would overview: Best practices when storing the data (i.e. what formats to use, how to use them servertime vs. generated time, etc.) Best practices when selecting data from the database with php (i.e. how to sort rows by date, how to retrieve only rows from a certain date, or a certain hour, etc).. Timezones and other issues that might come up. Thanks in advance.

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• Get "2:35pm" instead of "02:35PM" from Python date/time?

  - by anonymous coward

  I'm still a bit slow with Python, so I haven't got this figured out beyond what's obviously in the docs, etc. I've worked with Django a bit, where they've added some datetime formatting options via template tags, but in regular python code how can I get the 12-hour hour without a leading zero? Is there a straightforward way to do this? I'm looking at the 2.5 and 2.6 docs for "strftime()" and there doesn't seem to be a formatting option there for this case. Should I be using something else? Feel free to include any other time-formatting tips that aren't obvious from the docs. =)

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• Sort vector<int>(n) in O(n) time using O(m) space?

  - by Adam

  I have a vector<unsigned int> vec of size n. Each element in vec is in the range [0, m], no duplicates, and I want to sort vec. Is it possible to do better than O(n log n) time if you're allowed to use O(m) space? In the average case m is much larger than n, in the worst case m == n. Ideally I want something O(n). I get the feeling that there's a bucket sort-ish way to do this: unsigned int aux[m]; aux[vec[i]] = i; Somehow extract the permutation and permute vec. I'm stuck on how to do 3. In my application m is on the order of 16k. However this sort is in the inner loops and accounts for a significant portion of my runtime.

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• Cisco ASA5505 won't sync with NTP

  - by Martijn Heemels

  Today I noticed that the clock my Cisco ASA 5505 firewall was running about 15 minutes late, which surprised me since I've set up the NTP client. My two NTP servers 10.10.0.1 and 10.10.0.2 are virtualized Windows Server 2008 R2 domain controllers, and both have the correct time. As shown below, the ASA knows about the two servers, can ping them and seems to poll them periodically, so I suppose it can reach them both. The ASA claims its time source is NTP, however the clock is unsynchronized. Neither host is marked as synced. Result of the command: "ping 10.10.0.1" Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.10.0.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms Result of the command: "sh ntp ass" address ref clock st when poll reach delay offset disp ~10.10.0.1 .LOCL. 1 78 1024 377 0.5 643.69 17.0 ~10.10.0.2 10.10.0.1 2 190 1024 377 0.9 655.91 58.4 * master (synced), # master (unsynced), + selected, - candidate, ~ configured Result of the command: "sh ntp stat" Clock is unsynchronized, stratum 16, no reference clock nominal freq is 99.9984 Hz, actual freq is 99.9984 Hz, precision is 2**6 reference time is 00000000.00000000 (07:28:16.000 CEST Thu Feb 7 2036) clock offset is 0.0000 msec, root delay is 0.00 msec root dispersion is 0.00 msec, peer dispersion is 0.00 msec Result of the command: "sh clock detail" 10:33:23.769 CEDT Tue Jun 26 2012 Time source is NTP UTC time is: 08:33:23 UTC Tue Jun 26 2012 Summer time starts 02:00:00 CEST Sun Mar 25 2012 Summer time ends 03:00:00 CEDT Sun Oct 28 2012 I've tried the basic steps of manually setting the time and removing and adding the timeservers, to no avail. My ASA's ntp config is simply: ntp server 10.10.0.1 ntp server 10.10.0.2 Do I need to enable authentication to use a Windows NTP server? Any thoughts?

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• Netty options for real-time distribution of small messages to a large number of clients?

  - by user439407

  I am designing a (near) real-time Netty server to distribute a large number of very small messages to a large number of clients across the internet. In internal, go as fast as you can testing, I found that I could do 10k clients no sweat, but now that we are trying to go across the internet, where the latency, bandwidth etc varies pretty wildly we are running into the dreaded outOfMemory issues, even with 2 gigs of RAM. I have tried various workarounds(setting the socket stack sizes smaller, setting high and low water marks, cancelling things that are too old), and they help a little, but they seem to only help a little bit. What would some good ways to optimize Netty for sending large #s of small messages without significant delays? Also, the bulk of the message only consists of one kind of message that I don't particularly care if it doesn't arrive. I would use UDP but because we don't control the client, thats not really a possibility. Is it possible to set a separate timeout solely for this kind of message without affecting the other messages? Any insight you could offer would be greatly appreciated.

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