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• Skynet Big Data Demo Using Hexbug Spider Robot, Raspberry Pi, and Java SE Embedded (Part 3)

  - by hinkmond

  In Part 2, I described what connections you need to make for this demo using a Hexbug Spider Robot, a Raspberry Pi, and Java SE Embedded for programming. Here are some photos of me doing the soldering. Software engineers should not be afraid of a little soldering work. It's all good. See: Skynet Big Data Demo (Part 2) One thing to watch out for when you open the remote is that there may be some glue covering the contact points. Make sure to use an Exacto knife or small screwdriver to scrape away any glue or non-conductive material covering each place where you need to solder. And after you are done with your soldering and you gave the solder enough time to cool, make sure all your connections are marked so that you know which wire goes where. Give each wire a very light tug to make sure it is soldered correctly and is making good contact. There are lots of videos on the Web to help you if this is your first time soldering. Check out Laday Ada's (from adafruit.com) links on how to solder if you need some additional help: http://www.ladyada.net/learn/soldering/thm.html If everything looks good, zip everything back up and meet back here for how to connect these wires to your Raspberry Pi. That will be it for the hardware part of this project. See, that wasn't so bad. Hinkmond

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• Event notifications for Reporting Systems

  - by Marc Schluper

  The last couple of months I have been working on an application that allows people to browse a data mart. Nice, but nothing new. In this context I have an idea that I want to publish before anyone else patents it: event notifications. You see, reporting systems are not used as much as we’d like. Typically, users don’t know where to look for reports that might interest them. At best, there are some standard reports that people generate every so often, i.e. based on a time trigger. Or some reporting systems can be configured to send monthly reports around, for convenience. But apart from that, the reporting system is just sitting there, waiting for the rare curious user who makes the effort to dig a bit for treasures to be found. Wouldn’t it be great if there were data triggers? Imagine we could configure the reporting system to let us know when something interesting has happened. It would send us a message containing a link that would take us to the relevant section of the reporting system, showing a report with all the data pertaining to that event, preparing us for proper actions. Here in the North West this would really be great. You see, it rains here most of the time from October to June, so why even check the weather forecast? But sometimes, sometimes it snows. And sometimes the sun shines. So rather than me going to the weather site and seeing over and over again that it will be raining, making me think “why bother?” I’d like to configure the weather site so that it lets me know when the rain stops. Now, hopefully nobody has patented this idea already. Let me know.

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• A "tinkered" PC can ping by IP, not by hostname. How to fix?

  - by aitchnyu

  Like this: root@tis-server:~# ping www.google.com ping: unknown host www.google.com root@tis-server:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_req=1 ttl=55 time=50.3 ms 64 bytes from 8.8.8.8: icmp_req=2 ttl=55 time=65.4 ms It was tinkered by somebody else and I (and him!) cant trace his actions. The graphical connection manager also refuses to work thanks to the tinkering. It also makes route add default gw 192.168.0.1 necessary for each reboot to atleast ping by IP. How do I fix this? It is Ubuntu 11.10 As requested: Output of ifconfig: eth0 Link encap:Ethernet HWaddr 48:5b:39:ae:21:98 inet addr:192.168.0.100 Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::4a5b:39ff:feae:2198/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13194 errors:0 dropped:0 overruns:0 frame:0 TX packets:5156 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1420596 (1.4 MB) TX bytes:827295 (827.2 KB) Interrupt:42 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4817 errors:0 dropped:0 overruns:0 frame:0 TX packets:4817 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:377732 (377.7 KB) TX bytes:377732 (377.7 KB) Output of resolv.conf: Output of /etc/network/interfaces: GNU nano 2.2.6 File: /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.100 netmask 255.255.255.0

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• Troubleshooting VMware on Ubuntu

  Summary of different problems while using VMware products on Ubuntu. This article is going to be updated from time to time with new information about running VMware products more or less smoothly on Ubuntu. Following are links to existing articles: Running VMware Player on Linux (xubuntu Hardy Heron) Running VMware Server on Linux (version 1.0.6 on xubuntu) Using ext4 in VMware machine   VMware mouse grab/ungrab problem (Source: LinuxInsight) Upgrading GTK library in Ubuntu since Karmic Koala gives you a strange mouse behaviour. Even if you have "Grab when cursor enters window" option set, VMware won't grab your pointer when you move mouse into the VMware window. Also, if you use Ctrl-G to capture the pointer, VMware window will release it as soon as you move mouse around a little bit. Quite annoying behavior... Fortunately, there's a simple workaround that can fix things until VMware resolves incompatibilities with the new GTK library. VMware Workstation ships with many standard libraries including libgtk, so the only thing you need to do is to force it to use it's own versions. The simplest way to do that is to add the following line to the end of the /etc/vmware/bootstrap configuration file and restart the Workstation. export VMWARE_USE_SHIPPED_GTK="force" The interface will look slightly odd, because older version of GTK is being used, but at least it will work properly. Note: After upgrading a new Linux kernel, it is necessary to compile the VMware modules, this requires to temporarily comment the export line in /etc/vmware/bootstrap.

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• Further question on Intel graphics driver

  - by Thomas Byers

  Ok, Josh answered almost immed.! I need to know specifically, now that I am using Nvidia card effectively, do I need to allow update manager to update the intel gr. drivers? I must add, I believe I know why Update Manager is telling me I need to update those Intel gr. drivers. It probably happened because I tried to update my nvidia drivers and got a buggy install, which let to to a black screen. I shut the system down manually after that and rebooted to a black screen and upon a further reboot I ascertained that I could still dual-boot(windows 7) into the other os. Then I went through the restart process and at the grub2 menu chose other options and it was probably, at that time, that Linux was smart enough to know that nvidia drivers as installed weren't cutting it, and reverted to the onboard Intel graphics system...does that make sense? Anyway, after successfully getting up and running, I reinstalled my old but successful nvidia drivers and all was well again, except now upon running Update Manager, I am offered the Intel graphics driver upgrade each time, which, up til now I have unchecked...my question is now more obvious. Should I accept the Intel driver update and if I do, will it once again override my nvidia drivers?

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• Sorting objects before rendering

  - by dreta

  I'm trying to implement a scene graph and in all the articles i've come across there is talk about object sorting. So you'd sort your objects by "material" for example. Now untill i sat down and started implementing it, i kind of took this for granted, because it made sense. But now i'm wondering what does sorting actually change? In my engine, i have a manager for UBOs, i use those to store data that'll be shared between programs, at the moment that only involves time, camera and projection matrices and lights (i'm not worrying about managing which lights affect which objects ATM). Now for each model i have to change the model to world matrix uniform, no sorting is going to change that. So is the jump from changing this matrix to also setting a material for each object that bad? I vaguely remember reading somewhere that each time you change something in the pipeline, it has to get flushed and that can cause performance issues. But for each drawing call i'm setting up a model to world matrix anyway, so what sense does it make to ever be concerned about this? BTW is there any information about whether changing a uniform and calling glBufferSubData is more (or less) expensive.

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• Delaying a Foreach loop half a second

  - by Sigh-AniDe

  I have created a game that has a ghost that mimics the movement of the player after 10 seconds. The movements are stored in a list and i use a foreach loop to go through the commands. The ghost mimics the movements but it does the movements way too fast, in split second from spawn time it catches up to my current movement. How do i slow down the foreach so that it only does a command every half a second? I don't know how else to do it. Please help this is what i tried : The foreach runs inside the update method DateTime dt = DateTime.Now; foreach ( string commandDirection in ghostMovements ) { int mapX = ( int )( ghostPostition.X / scalingFactor ); int mapY = ( int )( ghostPostition.Y / scalingFactor ); // If the dt is the same as current time if ( dt == DateTime.Now ) { if ( commandDirection == "left" ) { switch ( ghostDirection ) { case ghostFacingUp: angle = 1.6f; ghostDirection = ghostFacingRight; Program.form.direction = ""; dt.AddMilliseconds( 500 );// add half a second to dt break; case ghostFacingRight: angle = 3.15f; ghostDirection = ghostFacingDown; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; case ghostFacingDown: angle = -1.6f; ghostDirection = ghostFacingLeft; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; case ghostFacingLeft: angle = 0.0f; ghostDirection = ghostFacingUp; Program.form.direction = ""; dt.AddMilliseconds( 500 ); break; } } } }

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• Failed to fetch *.deb Size mismatch, then packages with unmet dependencies [solved]

  - by user113907

  I recently bought the wonderfully looking and reviewed Amnesia The Dark Descent and I'm trying to install it. The first time I tried to download it, I had to stop in the middle of the download (may have broken something). The second time I tried to download, at the end of the download it gave me the following error: Failed to fetch https://private-ppa.launchpad.net/commercial-ppa-uploaders/amnesia/ubuntu/pool/main/a/amnesia/amnesia_1.2.1-0ubuntu2_i386.deb Size mismatch Now, whenever I try to download it, it gives me this error: The following packages have unmet dependencies: amnesia: Depends: libalut0 (>= 1.0.1) but it is not going to be installed Depends: libc6 (>= 2.4) but 2.15-0ubuntu10.3 is to be installed Depends: libfontconfig1 (>= 2.8.0) but 2.8.0-3ubuntu9.1 is to be installed Depends: libfreetype6 (>= 2.2.1) but 2.4.8-1ubuntu2 is to be installed Depends: libgcc1 (>= 1:4.1.1) but 1:4.6.3-1ubuntu5 is to be installed Depends: libopenal1 (>= 1:1.13) but 1:1.13-4ubuntu3 is to be installed Depends: libsdl1.2debian (>= 1.2.10-1) but 1.2.14-6.4ubuntu3 is to be installed Depends: libstdc++6 (>= 4.1.1) but 4.6.3-1ubuntu5 is to be installed Depends: libxft2 (> 2.1.1) but 2.2.0-3ubuntu2 is to be installed Depends: zlib1g (>= 1:1.1.4) but 1:1.2.3.4.dfsg-3ubuntu4 is to be installed I already searched the net and ran a few command line commands. Ex: sudo dpkg --configure -a sudo apt-get install -f Or configure the software packages to download from Main instead of the local UK server. But I'm really not figuring out a solution. I have a fresh install of the latest LTS (12.04). The only non-standard thing so far is that I installed gnome-shell (?) because I really can't stand Unity. Help would be much appreciated. I am currently more than entertained enough with World of Goo and Command & Conquer, but I will want to play Amnesia in the close future.

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• Java Virtual Developer Day Session Videos Available

  - by Tori Wieldt

  How are Lambdas handled on a bytecode level? How does replacing assembly code with Java code improve performance? Can we send flat files/comma separated/XML files to process in Batch? In a Java EE app, can I inject an EJB bean inside a REST POJO using @EJB annotation? Where I can find JavaFX UI controls? At OTN's Virtual Developer Day, Java experts answered these questions and more. Session are now available for you to view on demand (registration required). This is limited time offer: the sessions will be up to view for free for the next two weeks.  You can view sessions from these tracks: Java SE 8 Track Learn about the features scheduled for Java SE 8, including Lambda expressions, extension methods for interfaces and a new Date and Time API. Learn how to create basic apps with JavaFX.  Java EE Track Take a close look at the new functionality in Java EE 7. Get presentations and demos on JSON, WebSockets, Batch, Concurrency, JAX-RS 2, JMS 2,  Java Embedded Track Provides an introductions to the Raspberry Pi, the Keil board, ARM architecture, and how to make it all work with Java Embedded. You know Java, now really know Java. Check out the OTN Virtual Developer Day sessions!

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• Earmarks of a Professional PHP Programmer

  - by Scotty C.

  I'm a 19 year old student who really REALLY enjoys programming, and I'm hoping to glean from your years of experience here. At present, I'm studying PHP every chance I get, and have been for about 3 years, although I've never taken any formal classes. I'd love to some day be a programmer full time, and make a good career of it. My question to you is this: What do you consider to be the earmarks or traits of a professional programmer? Mainly in the field of PHP, but other, more generalized qualifications are also more than welcome, as I think PHP is more of a hobbyist language and may not be the language of choice in the eyes of potential employers. Please correct me if I'm wrong. Above all, I don't want to wast time on something that isn't worth while. I'm currently feeling pretty confident in my knowledge of PHP as a language, and I know that I could build just about anything I need and have it "work", but I feel sorely lacking in design concepts and code structure. I can even write object oriented code, but in my personal opinion, that isn't worth a hill of beans if it isn't organized well. For this reason, I bought Matt Zandstra's book "PHP Objects, Patterns, and Practice" and have been reading that a little every day. Anyway, I'm starting to digress a little here, so back to the original question. What advice would you give to an aspiring programmer who wants to make an impact in this field? Also, on a side note, I've been working on a project with a friend of mine that would give a fairly good idea of where I'm at coding wise. I'm gonna give a link, I don't want anyone to feel as though I'm pushing or spamming here, so don't click it if you don't want to. But if you are interested on giving some feedback there as well, you can see the code on github. I'm known as The Craw there. https://github.com/PureChat/PureChat--Beta-/tree/

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• Get external metadata with streamripper using python script

  - by user72379

  Hi I like using streamripper to rip music from the web. I have a favorite radio station that doesn't have the metadata for the songs, so I have to screen scrape it from its website manually. I created this neat python script in the format that the docs suggest, and linked the address in the GUI for streamriper. But it still doesn't work, any one know how to make it work..? I know it used to work. It gives you a sample here: http://streamripper.sourceforge.net/history.php import http import time import re u = 'SEE IMAGE FOR THIS URL' s = http.Session(0, 0) s.add_headers(h, persistent=1) while 1: c = unicode(s.get(u)) pat = r'class="title"([^<]+)([^<]+)' m = re.search(pat, c) title = m.group(1) artist = m.group(2) print 'TITLE='+title+'\n'+'ARTIST='+artist+'\n.\n' time.sleep(30) [img]http://s11.postimage.org/sok928lsz/urlstream.png[/img] I put the address to the script here: [img]http://s17.postimage.org/4bhmhi4yn/streamripper.png[/img] I've tried putting it in the root of the streamripper application and doing this: lax.py I've even compiled it to a EXE, and tried linking to that.. nothing What am I doing wrong?

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• How to implement a no-login authentication system

  - by mrwooster

  I am looking to build a very loose authentication system that can track a user and link submitted data/comments to a specific user. The submissions are essentially anonymous, but a user may want to edit his submission/comment at a later date. I want the experience to be as smooth as possible so do not want to ask users to sign up for an account and then login each time. There is no point as their submissions are not in their name and to another user browsing the site, there is no way of linking a submission to a specific user (think anonymous comments on a blog post or pastie). However, the user should have the ability to edit (at least in the short term) the content they have posted. The way I imagine doing this would be to place a unique identifier in a cookie on the users machine. This would enable me to link a submission to a user, and while that cookie remained on the users machine, I would allow them to edit their content. Of course, if the cookie is lost, or the user accesses the site from a different browser, then they would not be able to edit their content, but this is not really an issue, they can always resubmit a new piece of content. Is there a better way of doing this? How can I implement this so that the user can edit their data for the longest possible amount of time.

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• How to ask the boss to pay for qualifications?

  - by adamk

  Hi, I'm working as a junior developer for a startup company, and have been working here around 7 months now. After 4 months, we had a late quarterly review, and just before the boss mentioned there was a training budget, and we should let them know what training we needed and they'd get it for us. I asked for some training at the time, but 3 months have passed without mention of it, and I have since learnt what I needed in my own time (I just can't stop learning new things!) I took on a new role recently, so have been given some cheap ($60) training for that however. Now the next review is approaching, and I would like to get Adobe Qualified Expert qualifications for ActionScript 3 / Flex. I was told by a contracted co-worker who had left that I should try to get the company to pay for this, as it's something they can tell potential investors as a selling point. My question is though; how do I approach this with my boss? I don't want it to sound like I'm looking for another job and want the qualifications to look elsewhere!

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• design in agile process

  - by ying

  Recently I had an interview with dev team in a company. The team uses agile + TDD. The code exercise implements a video rental store which generates statement to calc total rental fee for each type of video (new release, children, etc) for a customer. The existing code use object like: Statement to generate statement and calc fee where big switch statement sits to use enum to determine how to calc rental fee customer holds a list of rentals movie base class and derived class for each type of movie (NEW, CHILDREN, ACTION, etc) The code originally doesn't compile as the owner was assumed to be hit by a bus. So here is what I did: outlined the improvement over object model to have better responsibility for each class. use strategy pattern to replace switch statement and weave them in config But the team says it's waste of time because there is no requirement for it and UAT test suite works and is the only guideline goes into architecture decision. The underlying story is just to get pricing feature out and not saying anything about how to do it. So the discussion is focused on why should time be spent on refactor the switch statement. In my understanding, agile methodology doesn't mean zero design upfront and such code smell should be avoided at the beginning. Also any unit/UAT test suite won't detect such code smell, otherwise sonar, findbugs won't exist. Here I want to ask: is there such a thing called agile design in the agile methodology? Just like agile documentation. how to define agile design upfront? how to know enough is enough? In my understanding, ballpark architecture and data contract among components should be defined before/when starting project, not the details. Am I right? anyone can explain what the team is really looking for in this kind of setup? is it design aspect or agile aspect? how to implement minimum viable product concept in the agile process in the real world project? Is it must that you feel embarrassed to be MVP?

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• Battery is drained too quickly

  - by LucaB

  I'm getting really low battery life under ubuntu, not even close to windows. I tried powertop, and I saw that my laptop is consuming in idle nearly 20 watts (a bit more). I tried to install laptop-mode-tools, change "good" into "bad" in powertop, but nothing changes. I see that I have the the HD audio output device which is running at 100% every time. Could this be the problem? This is a report from powertop. The battery reports a discharge rate of 22.8 W The estimated remaining time is 33 minutes Summary: 381.8 wakeups/second, 0.0 GPU ops/second and 0.0 VFS ops/sec Usage Events/s Category Description 3.2 ms/s 182.7 Timer tick_sched_timer 100.0% Device Audio codec hwC0D3: Intel 7.9 ms/s 25.1 Process /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background no 1.9 ms/s 24.2 Interrupt [6] tasklet(softirq) 2.9 ms/s 23.2 Process /usr/lib/chromium-browser/chromium-browser --type=zygote 8.1 ms/s 20.3 Process /usr/lib/unity/unity-panel-service 0.7 ms/s 17.4 Timer hrtimer_wakeup 4.2 ms/s 12.6 Process unity-2d-panel 604.4 µs/s 9.7 Process syndaemon -i 2.0 -K -R -t 149.7 µs/s 9.7 kWork ieee80211_iface_work 0.8 ms/s 8.7 Process metacity 19.5 ms/s 1.0 Process powertop 3.0 ms/s 6.8 Process //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session 699.0 µs/s 6.8 Process /usr/lib/thunderbird/thunderbird 4.3 ms/s 4.8 Process gnome-terminal 658.9 µs/s 2.9 Interrupt [1] timer(softirq) 75.1 µs/s 2.9 kWork iwl_bg_run_time_calib_work 163.8 µs/s 1.9 Process /usr/lib/accountsservice/accounts-daemon 70.6 µs/s 1.9 Process [ksoftirqd/2] 25.8 µs/s 1.9 Process [ksoftirqd/0] 1.0 ms/s 1.0 Process /usr/bin/python /usr/sbin/powernapd 408.2 µs/s 1.0 Process unity-2d-shell 189.8 µs/s 1.0 Process /usr/lib/chromium-browser/chromium-browser 124.4 µs/s 1.0 Process /usr/lib/unity-lens-applications/unity-applications-daemon 113.3 µs/s 1.0 Process /usr/lib/gnome-settings-daemon/gnome-settings-daemon 112.0 µs/s 1.0 Process nautilus -n 104.9 µs/s 1.0 Process /usr/lib/gvfs/gvfsd-trash --spawner :1.2 /org/gtk/gvfs/exec_spaw/0 77.5 µs/s 1.0 Process /usr/lib/x86_64-linux-gnu/colord/colord 75.6 µs/s 1.0 Process /usr/lib/gvfs/gvfs-gdu-volume-monitor 75.0 µs/s 1.0 Interrupt [53] i915 74.9 µs/s 1.0 Process /usr/lib/gvfs/gvfs-afc-volume-monitor What should I do to make the battery consumption lower?

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• Remove unwanted Mount option from Places Menu

  - by Jack

  On Ubuntu 10.10, I added a CIFS network share into /etc/fstab using /media/pub as my mount point. The share becomes visible on the Desktop and under Places (drive icon), which is what I want. But the problem is, Ubuntu 10.10 (unlike 10.04) creates another entry under Places with same name "pub", except this appears to be a mount shortcut rather than another link to the share. When I move my mouse over it says "Mount pub" and if I click on it, it will mount the share and again each time (if already mounted) - it does not display contents of share. In either case, an error pops up soon after "Unable to mount pub - Timeout waiting for mount to appear". The share itself is accessible, but I can't unmount via GUI, system reports its mounted multiple times and I have to unmount via terminal. (sudo umount -a) As I'm mounting the share at boot time, I don't need this manual option under Places. Is there an easy way to stop Ubuntu from listing it under Places? I have tried making the mount point under /mnt, this fixes the problem, except creates another as it removes the drive icon from Desktop and Places. I could create a bookmark, but just wondered if there's an easy fix to this unwanted entry under Places. Thanks

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• Is it good idea to require to commit only working code?

  - by Astronavigator

  Sometimes I hear people saying something like "All committed code must be working". In some articles people even write descriptions how to create svn or git hooks that compile and test code before commit. In my company we usually create one branch for a feature, and one programmer usually works in this branch. I often (1 per 100, I think and as I think with good reason) do non-compilable commits. It seems to me that requirement of "always compilable/stable" commits conflicts with the idea of frequent commits. A programmer would rather make one commit in a week than test the whole project's stability/compilability ten times a day. For only compilable code I use tags and some selected branches (trunk etc). I see these reasons to commit not fully working or not compilable code: If I develop a new feature, it is hard to make it work writing a few lines of code. If I am editing a feature, it is again sometimes hard to keep code working every time. If I am changing some function's prototype or interface, I would also make hundreds of changes, not mechanical changes, but intellectual. Sometimes one of them could cause me to carry out hundreds of commits (but if I want all commits to be stable I should commit 1 time instead of 100). In all these cases to make stable commits I would make commits containing many-many-many changes and it will be very-very-very hard to find out "What happened in this commit?". Another aspect of this problem is that compiling code gives no guarantee of proper working. So is it good idea to require every commit to be stable/compilable? Does it depends on branching model or CVS? In your company, is it forbidden to make non compilable commits? Is it (and why) a bad idea to use only selected branches (including trunk) and tags for stable versions?

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• 48hrs in Cambridge.

  - by Fatherjack

  In just over 2 weeks something pretty big in the SQL Server Community in the UK is taking place. We are going to witness the first SQL Saturday on these shores. The event is running in Cambridge, the home of the SQL Cambs user group and the chapter leader there (Mark Broadbent) is the lead on the SQL Saturday event too. Mark and his team are making final preparations and looking forward to this event getting started with the Pre-Con day on Friday 7th Sept. They have 3 great sessions from Buck Woody, Jen Stirrup and Mark Rasmussen for those lucky enough to be able to attend on the Friday. There are over 30 speakers providing 4 tracks of sessions on the Saturday so there will be plenty to interest and inform anyone working with SQL Server, take a look at all the sessions on the schedule. In addition to all of this you will be able to spend some quality time talking to all the other attendees, sponsors and PASS representatives to make the most of your time there. If you haven’t registered yet then head over to http://sqlcambs.org.uk/ and get your name down to attend this milestone event.

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• Using EC2 instance as main development platform

  - by David

  My problem I am working as a consultant for various companies. Each company provides me with a laptop where with their software on and I also have my own where I have my development environment. I tend to buy a new laptop every second year and find myself spending lots of time configuring and installing software. I also sometimes spend a lot of time waiting for my laptop to process things. To solve all these issues, I am now considering using EC2 (running windows instances) as my main development platform and just access this from any PC I happen to be at. I calculated that running the High-CPU On-Demand Instances (medium) for 8 hours a day for a year costs me 580$, which is acceptable. I imagine that when I approach the workplace each day, I will make a single click my phone to fire up the instance, so it is ready when I get to work. I should have different icons on my phone to fire up the various instance types. The same software should of course automatically be loaded on the various hardware (sometimes I would even need their instance with 68.4 GB of memory). Another advantage is that if I am having a specific problem with my instance, I could fire up another instance and have someone look into the problem and update the image. My question: Does anyone have experience with such a setup on EC2? What kind of problems do you forsee?

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• HP Pavilion 15 with AMD dual graphics - Ubuntu live environment not starting

  - by creepus

  I've had this laptop for about a day now and have decided to try Ubuntu on it and determine if I want to install it. I created a USB, it booted (Secure Boot was on, I tried with Secure Boot off to no effect), and then the problem occurred. The screen turned off for a second, turned back on to a black screen, shut off again and turned back on with a dialogue box telling me that the system had to use low-graphics mode. I clicked OK, selected low-graphics mode from the menu and clicked OK. The screen switched to the boot messages and did not go any further than this. Ctrl+Alt+DEL started rebooting the laptop though. I tried booting again, but this time I edited the boot options in GRUB to add nomodeset. This time, the laptop only booted to a black screen. Ctrl+Alt+F2 took me to a prompt, I tried startx from there, but X didn't start, complaining that it wanted kernel mode setting back. I can not seem to find any option to disable one graphics chip or the other in the UEFI setup menus. Laptop : HP Pavilion 15-E004AU. The CPU : AMD A6-4400M APU with Radeon(tm) HD Graphics The graphics chip : AMD Radeon HD 7520G + 8670M Dual Graphics. The Ubuntu version : 13.10, 64 bit. Thanks. EDIT: I tried 12.04.3 LTS, it managed to bring the desktop up. There are severe graphics glitches after about two minutes though.

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• Supporting and testing multiple versions of a software library in a Maven project

  - by Duncan Jones

  My company has several versions of its software in use by our customers at any one time. My job is to write bespoke Java software for the customers based on the version of software they happen to be running. I've created a Java library that performs many of the tasks I regularly require in a normal project. This is a Maven project that I deploy to our local Artifactory and pull down into other Maven projects when required. I can't decide the best way to support the range of software versions used by our customers. Typically, we have about three versions in use at any one time. They are normally backwards compatible with one another, but that cannot be guaranteed. I have considered the following options for managing this issue: Separate editions for each library version I make a separate release of my library for each version of my company software. Using some Maven cunningness I could automatically produce a tested version linked to each of the then-current company software versions. This is feasible, but not without its technical challenges. The advantage is that this would be fairly automatic and my unit tests have definitely executed against the correct software version. However, I would have to keep updating the versions supported and may end up maintaining a large collection of libraries. One supported version, but others tested I support the oldest software version and make a release against that. I then perform tests with the newer software versions to ensure it still works. I could try and make this testing automatic by having some non-deployed Maven projects that import the software library, the associated test JAR and override the company software version used. If those projects build, then the library is compatible. I could ensure these meta-projects are included in our CI server builds. I welcome comments on which approach is better or a suggestion for a different approach entirely. I'm leaning towards the second option.

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• How to Change the Cmd+Q Shortcut Key in OS X (to Stop Accidentally Closing Apps)

  - by The Geek

  If you’ve spent any time using Mac OS X, you’ve figured out that the Cmd+W shortcut key closes a window or tab, while the Cmd+Q key quits the entire app. The problem? The keys are right next to each other, and way too easy to accidentally hit! Here’s how to change it. This problem is compounded even more when you’re using an application like Google Chrome, Safari, or Firefox, where you’re opening or closing tabs all the time, and probably using the Cmd+W key to close just the current tab. If you aren’t careful, you’ll accidentally hit Cmd+Q instead, and your entire browser gets closed. Latest Features How-To Geek ETC How to Use the Avira Rescue CD to Clean Your Infected PC The Complete List of iPad Tips, Tricks, and Tutorials Is Your Desktop Printer More Expensive Than Printing Services? 20 OS X Keyboard Shortcuts You Might Not Know HTG Explains: Which Linux File System Should You Choose? HTG Explains: Why Does Photo Paper Improve Print Quality? Awesome WebGL Demo – Flight of the Navigator from Mozilla Sunrise on the Alien Desert Planet Wallpaper Add Falling Snow to Webpages with the Snowfall Extension for Opera [Browser Fun] Automatically Keep Up With the Latest Releases from Mozilla Labs in Firefox 4.0 A Look Back at 2010 Through Infographics Monitor the Weather with the Weather Forecast Extension for Opera

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• links for 2011-02-07

  - by Bob Rhubart

  Creating JAXWS Service in WebLogic Workshop Middleware Magic Jay SenSharma shares "a simple demo which explains how we can create a Complex JAXWS WebService using WebLogic Workshop." (tags: WebLogic jaxws middleware) Wentari: Re-Learning PeopleSoft "If I truly want to be an enterprise architect, what better way than to have hands on knowledge about all the Oracle offerings outside of my specialization in Siebel and OBIEE." -- Peter Yeung (tags: oracle otn businessintelligence obiee siebel) Andrejus Baranovskis's Blog: CreateWithParams Operation for Oracle ADF BC 11g Oracle ACE Director Andrejus Baranovski illustrates how you can apply a CreateWithParams operation in two easy steps. (tags: oracle otn oracleace soa) APEX plugins contributed to the APEX community by AMIS developers AMIS Technology blog The APEX 4.0 plugin framework "allows for more more organized, better structured development with lots more reuse potential," according to Oracle ACE Director Lucas Jellema. (tags: oracle otn oracleace apex) Oracle BI EE 11g and Oracle ADF - Part 2 - Real Time reporting using View Objects Venkatakrishnan J looks into "another reporting innovation (by use of the common ADF Framework) i.e. real time reporting using BI EE by directly reversing metadata from a transactional application. (tags: oracle otn oracleace businessintelligence obiee adf) On-demand Webcast: Java in the Smart Grid (The Java Source) Learn more about the Smart Grid and the role that Java is poised to play in this important initiative. (tags: oracle otn java smartgrid)

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• Customers Deploying Sun Oracle Database Machine

  - by kimberly.billings

  Philippine Savings Bank (PS Bank) recently deployed the Sun Oracle Database Machine to underpin its enterprise-wide analytics platform. Now, the response times for queries and requests that used to take from three hours to several days is completed in less than one minute with near real-time updates. Read the press release. EFU General Insurance also announced this week that they have deployed the Sun Oracle Database Machine. With Oracle, EFU will be able to open more sales channels via the Web and facilitate integration with other companies. As a result, more quality services can be offered to its customers via the Web because of the more agile and reliable IT infrastructure. In addition, a centralized IT environment will offer the EFU management a real time view of key information, enabling EFU to analyze business trends and make timely decisions. Read the press release. Let us know about your Sun Oracle Database deployment! 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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• Google+ Platform Office Hours for June 13th, 2012

  Google+ Platform Office Hours for June 13th, 2012 Here are the show notes for this week's office hours. This week was devoted to your questions and our answers. We covered a wide breadth of topics. 0:43 - Introductions 2:54 - About Tabletop Forge's KickStarter - goo.gl 10:00 - Can I run multiple Hangout Apps at the same time? 12:28 - Is Google looking into adding more powerful Hangout moderation controls? 13:47 - How do you use Hangout Apps with Hangouts on Air? - +Fraser Cain's tips and tricks for Hangouts on Air: goo.gl 23:40 - I have an Android game. How do I port it to the Hangouts API? 27:57 - Pre-hangout Apps, Hangouts on Air pre-rolls, scheduling hangouts and other ways to help viewers find your Hangouts on Air 33:55 - How do I bookmark useful Google+ posts with Google+? 38:13 - Can you add a host ID field to the Hangouts API? When will the overlay garbage collection improve? 40:17 - Hand movement tracking as part of the Hangouts API Thanks to everyone who joined the hangout and asked questions on Google+! From: GoogleDevelopers Views: 698 18 ratings Time: 44:16 More in Science & Technology

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