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  • Wireless technology - which is better: more single radio APs or less dual radio APs?

    - by gert_78
    We are currently talking to vendors of wireless solutions for a wireless deployment in a university campus with some 5000 students. One vendor is offering us a Cisco solution with a WLC 5508 controller and 69 2x2 MIMO Dual-band/Dual radio APs (Aironet AP 1042 model) The other vendor is offering us an Aruba solution with a 3600 controller and 96 2x2 MIMO dual band BUT single radio APs (Aruba AP93) Both vendors are charging 82.000 US$ (support, 3y service contracts, switches and additional required options all included of course) The Aruba vendor is trying to convince me that 96 single radio APs will give us more connection/users/capacity then the 69 dual radio APs. I have my doubts about that and since it is my core competence-domain I wanted to ask here the opinion of people that have a more profound knowledge and experience in this area. When you talk to vendors it's often hard to get objective information. So try to answer only if you are sure and please mention it if you are affiliated with one of the vendors. I appreciate all useful help and want to thank you in advance for the effort!

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  • Laptop charger disconnects and reconnects, charger or battery broken?

    - by Rob
    I've got an Acer Aspire One netbook (AOA-150) and there's obviously something wrong with it. The charging port gets VERY HOT and the charger seems to disconnect and reconnect quickly sometimes. This only happens when the netbook is running, and it doesn't seem to care what it's doing other than being on. The battery has an extremely short life (< 30minutes, sometimes) and I almost exclusively run it on the power cable (which needs the battery plugged in. Having it just plugged into the wall won't start up). Does this sound like a problem with the power cable or the battery? The plug for the cable and the port get so hot that if I held them for longer than a few seconds, I'm sure I'd get burnt. EDIT Just got "Popular Question" on this and it WAS the power jack. The ground on it came loose from the board. A bit of solder on it and everything is working great again.

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  • Linux: disbale USB without disabling power

    - by Ergot
    TLDR I want toggle between the following usages of a usb-port via the terminal: use like a normal usb-port only supply energy to charge Story I recently got me something like a magna doodle that can save your drawings to pdf, which can be moved to your computer via usb afterwards. Now the thing is that you can't save anything while it's plugged in. Because it's the only way to charge it, it bugs me that I can't find a software solution and laziness I want to keep it plugged in and toggle the connection to the computer only when needed. I noticed that it's charging and usable when it is plugged in and the computer is shut down or suspened. So I guess that there's a way to do it. Tech info computer: ThinkPad X201 Linux Kernel: 3.14.5-1-ARCH "Magna doodle": Boogie Board Sync

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  • Why does the CPU usage reach 100% when laptop is plugged in?

    - by Mayank
    I have an HP Elitebook 8440p with Windows 7 Ultimate, i7 Processor and 8 GB RAM. For the last couple of days, when I plug-in my laptop for charging, the CPU usage shoots up to 100% and remains there for around 15 minutes. No offending process shows up in Task Manager/Process Explorer but the laptop is practically unusable for that time. The CPU usage becomes normal when I remove the power cord but shoots up again when plugged back. This is happening with different power adapters/wall sockets so it might not be a faulty adapter issue. Why is this happening and any pointer to resolve this issue?

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  • Is my Power Supply Unit fried?

    - by Rob
    So my laptop just started smoking where I plug my charger in. I run a netbook, the Acer Aspire One. My charger won't charge it, because when I plug my charger into the netbook, the charging light that indicates the netbook is receiving power turns off. Is there anything I can do to troubleshoot where the problem is and what should I do now? Is just my charger fried and should I replace it. Or could there also be a problem with my netbook and do I need to look for other problems?

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  • Transferring NS records to a new server

    - by lanemiller
    I feel like that was NOT worded well, but here is my current predicament. I recently had a GoDaddy dedicated server, and decided after their customer support failed to do anything but disappoint, to switch to Rackspace. We have 2 ns records that point to our godaddy server, and we have a few sites left on the server, that rely on it for their DNS zones, and the owners of the domains fail to respond to us. So, the question is, if I need to transfer the sites off of the OLD godaddy NS, can I point the A records from my ns1.domain.com and ns2.domain.com to match up with IP addresses of the Rackspace nameservers? OR, do I cname my NS records to match the rackspace ones? I DO know that this isn't advised, either method, but I need to get these sites moved before Godaddy tries charging another $2k for the server.

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  • Battery won't charge and BSOD: DRIVER_POWER_STATE_FAILURE

    - by JamesGecko
    I have a Dell Vostro 1510 running Windows 7. Today when I pulled my machine out of it's bag and plugged it in, the little battery light on the side blinked constantly instead of staying solid, and Windows showed a message that the battery was not charging. The battery is 3.5 years old, but it can still hold the machine in standby overnight, so I don't know why it won't charge anymore. After I have had the machine on for a while (20 minutes the first time, 40 minutes the second time), it shows a blue screen of death with the message DRIVER_POWER_STATE_FAILURE and reboots. I can deal with the battery being dead, but not with blue screens of death. Does anyone know how to fix it? Edit: Potentially relevant, this started happening after an OS update was automatically installed on Friday and Windows started nagging to reboot. The first BSOD was before the reboot; the update made a lot of registry changes when the machine came up, and the second BSOD was 40 minutes later.

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  • USB port causing device problems after new motherboard upgrade

    - by enbuyukfener
    I'm looking into a PC with an issue with one of the front USB ports (perhaps both). It was working before a motherboard upgrade but since then, a USB drive was inserted, overheated and does not appear to be working. Then a phone (with USB charging) was plugged in, and the phone OS suspended. Removing and re-inserting the battery led to the phone (and hence battery) working, however the battery no longer charges (including with a wall charger). It seems too much to be a coincidence and am wondering what the issue may be? Ideas so far are short circuiting, or over-current to the USB ports. Note: Did not occur to me, so details are not 100% accurate or complete. Feel free to ask for missing info that I may have forgotten though.

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  • Battery notification always showing 'xx% remaining' with Windows 7 on an acer Aspire 5590

    - by dindeman
    My battery level always shows up as something like 55% remaining or 63% remaining ...etc despite that it is in fact charging. Additionally it doesn't go any further than 80% remaining even if I keep it in charge forever. This leads me to a side annoying effect which is that I cannot proceed to install Windows 7 Service Pack 1 as its installer requires the laptop to be plugged with a power cord. My laptop is plugged with the power cord but because of the above issue (it doesn't display anything else than the xx% remaining) Windows thinks that the laptop is using its battery and that the power cord is disconnected. I have installed the original acer ePower Management tool that let you configure the power scheme... etc, I was hoping that this would help me circumvent the 80% issue but it doesn't.

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  • Is my Power Supply Unit fried?

    - by Rob
    So my laptop just started smoking where I plug my charger in. I run a netbook, the Acer Aspire One. My charger won't charge it, because when I plug my charger into the netbook, the charging light that indicates the netbook is receiving power turns off. Is there anything I can do to troubleshoot where the problem is and what should I do now? Is just my charger fried and should I replace it. Or could there also be a problem with my netbook and do I need to look for other problems?

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  • USB 3.0 hub; what can it power?

    - by pouzzler
    I own an Asus UX31A laptop, equipped with 2 USB 3.0 ports. I would like to connect several USB devices to one of these ports, using a USB 3.0 hub. 1) Am I correct in assuming the Asus "USB Charger+" commercial blurb corresponds to the USB 3.0 standard "Battery Charging Specification 1.2", and furthermore inferring that the laptop can deliver 1.5A through a USB port? 2) Does a powered external USB 3.0 hard drive draw on the USB power lines? 3) I would like to connect the aforementionned drive, an android phone, and a 200mA rated optical mouse to an unpowered USB 3.0 hub, itself plugged into the laptop. Should my above assumptions be false, would this setup be able to power all three devices? Thanks to the usb guru who'll settle my fears to rest. Best regards, Sébastien

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  • Can I use stronger power supply to charge Kindle? [closed]

    - by Bobb
    I have power supply for Kindle with output 5V 0.85A. And I have Samsung Galaxy Pad one with output of 5V 2A. My guess is that a device will consume as much current as it can but no more than max power supply current. For example if Kindle device consumes 0.6A for charging its battery then it shouldnt create more than 0.6A current using Galaxy Pad power supply. So my guess - if I charge Kindle with Galaxy Pad power supply it wont burn out. Is that right?

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  • I dropped my hp laptop and it has been on the startup repair screen for hours now--what can I do?

    - by tiy
    I dropped my hp laptop (I have windows 7). There was a blue screen with the cursor. It took about an hour or two for the startup repair screen to appear. Then it says to wait at least an hour. I've been charging my laptop for around a day now and the same screen, with a bar with blue moving, is still there. It says it's fixing disc errors. What can I do to get to the windows screen with usernames and pictures/fix it? thanks.

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  • Any Microsoft SQL Server 2008 licensing restrictions on usage?

    - by ryrobes
    Does Microsoft have any problems with HOW I USE SQL Server Standard Edition 2008? I plan on using it to aggregate my clients various data sources and report on them (using the whole stack - SSIS, DB, Analysis Services and Reporting Services) via the web. I don't want to run into any issues with being accused of "re-selling" services / features when I'm not allowed to, etc. In essence, I'm charging people to build them solutions based on / using MY licensed copy and then giving them access to the final products. (reports, etc) It seems straightforward enough - but who knows with MS... (BTW, Licensed by processor / not CAL)

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  • My laptop adapter has just faintly chirped like a cricket. Should I not plug it into my laptop again?

    - by Bloke
    The DC end that goes into the laptop was unplugged and the AC end was plugged into the mains (actually the plug sucks, so it could have been that it was...you know...just on the border. Getting and losing contact many times in a short amount of time if I moved the cable a bit) ...So one of these times that I just touched the cable, it did this chirping cricket sound and I unplugged it immediately. It did smell a bit weird, but I'm not sure if that's normal (due to heat or whatever).. So, should I be afraid of if? Can it kill my laptop if I try charging it? I only have around half an hour of battery left. Please help. Hope this is the right StackExchange site to ask. Thank you in advance

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  • Copyrights concerning code snippets and larger amounts of code

    - by JustcallmeDrago
    I am designing a public code repository. Users will be allowed to post and edit whatever amount of code they want, from code snippets to entire multi-file projects. I have a few major legal concerns about this: Not getting sued/shut down - I feel the site would be a much easier target than tracking down an individual user to sue. I have looked around a bit and see links to legal info in the footer of each page is common. What specific things should I do--and what does does a site such as YouTube (which I see copyrighted material on all the time) do--for protection? Citing sources and editing sourced code - If a user wants to post code that isn't theirs, what concerns/safeguards should I have? Will a link suffice, and what do I need further to allow the code to be edited (to improve it for example)? What can happen if a user posts copyrighted code without citing it? Large chunks of code - What legal differences should I look out for as the amount grows? Not having a mess of licenses for the site - I would like to have a single license (like RosettaCode) that keeps things simple for interaction on the site. I want the code to be postable and editable. I have looked into StackOverflow's CreativeCommons license a little and it says that If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one. And on RosettaCode: All software found on Rosetta Code should be considered potentially hazardous. Use at your own risk. Be aware that all code on Rosetta Code is under the GNU Free Documentation License, as are any edits made by contributors. See Rosetta Code:Copyrights for details. What other licenses are like this? Commercializing the site - In what ways can I and can't I make money off of a site that contains code like this? All code will be publicly visible. Initial thoughts are having ads or making money by charging for advanced features.

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  • To have a long life with the battery it has to be separated from the Laptop after each use

    - by laptopo1 dsad
    To have a long life with the battery it has to be separated from the Laptop after each use Developing a Laptop and concern about it's battery life Don't be concerned follow this advice how to deal with your Laptop battery. A fresh power supply of your Laptop can be purchased in a very low charge condition, and must be fully charged before use. A different battery pack needs to be fully charged and fully discharged or cycled as much as five times to condition them into performing at full capacity. And also refer your manual instructions of one's Laptop for charging instructions. Inspiron 15z battery Tips: Unplug battery after use: To have a long life with the battery it has to be separated from the Laptop after each use. Clean battery contacts often: Clean your battery's metal contacts once in a month with a cloth moistened with rubbing alcohol. This prevents the transfer of power out of your battery additional efficient. Turn off the WiFi and Bluetooth, in any other case being used: Usually, we activate our WiFi or Bluetooth for whatever reason and tend to forget to Off it, that could spark a huge relieve your battery, Shut off right after the usage. Dell XPS L501x battery Dim notebook screen: When you're with your Laptop in Daytime, you will need for full brightness. But also in case of Night, just dim the screen reducing brightness, which will consume more charge once the brightness might be more and also It's essential on your eyes to determine lesser brighten screen inside nights. Dell Inspiron 17R battery Have hardly any Background programs: Letting more programs to own behind the screen could consume more Dell Inspiron N4010 battery charge hence have very few without background programs are Better. Make use of the Hard disk drive more than CD/DVD drive: Making use of disc drive instead your CD/DVD drive could consume less battery power. Latitude E5400 Battery

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  • You Need BRM When You have EBS – and Even When You Don’t!

    - by bwalstra
    Here is a list of criteria to test your business-systems (Oracle E-Business Suite, EBS) or otherwise to support your lines of digital business - if you score low, you need Oracle Billing and Revenue Management (BRM). Functions Scalability High Availability (99.999%) Performance Extensibility (e.g. APIs, Tools) Upgradability Maintenance Security Standards Compliance Regulatory Compliance (e.g. SOX) User Experience Implementation Complexity Features Customer Management Real-Time Service Authorization Pricing/Promotions Flexibility Subscriptions Usage Rating and Pricing Real-Time Balance Mgmt. Non-Currency Resources Billing & Invoicing A/R & G/L Payments & Collections Revenue Assurance Integration with Key Enterprise Applications Reporting Business Intelligence Order & Service Mgmt (OSM) Siebel CRM E-Business Suite On-/Off-line Mediation Payment Processing Taxation Royalties & Settlements Operations Management Disaster Recovery Overall Evaluation Implementation Configuration Extensibility Maintenance Upgradability Functional Richness Feature Richness Usability OOB Integrations Operations Management Leveraging Oracle Technology Overall Fit for Purpose You need Oracle BRM: Built for high-volume transaction processing Monetizes any service or event based on any metric Supports high-volume usage rating, pricing and promotions Provides real-time charging, service authorization and balance management Supports any account structure (e.g. corporate hierarchies etc.) Scales from low volumes to extremely high volumes of transactions (e.g. billions of trxn per hour) Exposes every single function via APIs (e.g. Java, C/C++, PERL, COM, Web Services, JCA) Immediate Business Benefits of BRM: Improved business agility and performance Supports the flexibility, innovation, and customer-centricity required for current and future business models Faster time to market for new products and services Supports 360 view of the customer in real-time – products can be launched to targeted customers at a record-breaking pace Streamlined deployment and operation Productized integrations, standards-based APIs, and OOB enablement lower deployment and maintenance costs Extensible and scalable solution Minimizes risk – initial phase deployed rapidly; solution extended and scaled seamlessly per business requirements Key Considerations Productized integration with key Oracle applications Lower integration risks and cost Efficient order-to-cash process Engineered solution – certification on Exa platform Exadata tested at PayPal in the re-platforming project Optimal performance of Oracle assets on Oracle hardware Productized solution in Rapid Offer Design and Order Delivery Fast offer design and implementation Significantly shorter order cycle time Productized integration with Oracle Enterprise Manager Visibility to system operability for optimal up time

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  • Quoting people for website dev. work

    - by Jason
    Hi All, I have recently given some quotes to a few people. And I need some advice about how things should be done... Q1: I've seen, heard of and read about a lot of developers using free resource sites online to obtain free Privacy Policy, Disclaimers etc for their/customers websites. A customer I quoted the other day expected me to write/get a disclaimer for their site. Who in their right mind would expect a document like that from a Web Developer? I just told them that they need to sort that stuff out themselves with a Lawyer or something, and then to send it to me so I can paste it on a webpage for them. Q2: If you're charging per hour, and you estimate that the project would take 1week to finish (including testing/releasing), but you soon realise that you'll require more time, do you RE-quote them? Or do you just finish off the site at the original quote price? Q3: How do you figure out how much you will charge your customers? Do you charge per-feature, or per hour, or per day, or all of the above? Thanks :)

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  • Brand new battery is 100% charged but at 0% capacity

    - by Chris Conway
    I just bought a brand new battery to replace one that had seemingly died. I followed the instructions that came with the battery and charged it overnight, then ran my computer on battery until it was in a critical state and charged it overnight again. Now the battery appears to be 100% charged and at the same time at 0% capacity—when it's plugged in it doesn't charge and when it's unplugged the computer immediately goes into low power mode. I've taken the battery out and checked the contacts. I've rebooted the system with and without the battery. Nothing seems to help. I'm not sure if I should blame the battery, the laptop, the charger, or the power management software for this state of affairs. The obvious answer would be the battery but I bought this battery because another year-old battery exhibited similar behavior—I assumed it was dead and a Dell tech came to the same conclusion. I'm loathe to order another new battery without first exploring other explanations. What can I do to diagnose this problem? Here's the /proc info: $ cat /proc/acpi/battery/BAT0/state present: yes capacity state: critical charging state: charged present rate: 1 mA remaining capacity: 0 mAh present voltage: 9754 mV $ cat /proc/acpi/battery/BAT0/info present: yes design capacity: 6600 mAh last full capacity: 6789 mAh battery technology: rechargeable design voltage: 11100 mV design capacity warning: 660 mAh design capacity low: 200 mAh cycle count: 0 capacity granularity 1: 66 mAh capacity granularity 2: 66 mAh model number: DELL WK serial number: 4043 battery type: LION OEM info: SMP

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  • Ask The Readers: How Do You Camouflage Your Tech?

    - by Jason Fitzpatrick
    We love having a technology-packed house as much as the next geek, but not all our gizmos, gadgets, and peripherals are exactly Home and Garden approved. How do you enjoy all your tech without your living room and office looking like an electronics store? Image courtesy of Weekly Geek’s DIY charging station tutorial. Whether it’s to hide the insanely intense LEDS, minimize the visual clutter, or to boost the wife/husband acceptance factor of your geeky hobbies higher, there’s a variety of reasons for wrangling cables, hiding routers, or otherwise camouflaging your gear. This week we want to hear all about your tips for hiding or otherwise minimizing the appearance of gear around your home, office, and other personal spaces. Sound off in the comments with your best tips, trick, and camouflaging techniques; check back in on Friday for the What You Said roundup. HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization HTG Explains: What Is RSS and How Can I Benefit From Using It?

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  • Email provider - suggestions needed

    - by Christian Fazzini
    We are looking for a good way to have email support. In theory, we need to allow end-users to send emails directly to support and careers. i.e. support@domain_name_here.com and careers@domain_name_here.com. Second, we need to provide emails to our staff. So each staff member has their own email address. i.e. joe@domain_name_here.com, meghan@domain_name_here.com, etc. Google Apps is one that we are considering. However, they are charging $50 per user, per year. Not so bad, considering the quality and the features they offer. However, there are also cheaper alternatives. i.e. my domain registrar offers an email plan for $20 / year / 10 emails. Go Daddy has a number of plans and still a lot more affordable than Google Apps. So far Namecheap and Go Daddy are the only ones I have looked at for email plans. Is it worth signing up with Google Apps? Or are there better alternatives? Your thoughts?

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  • Why is it that software is still easily pirated today?

    - by mohabitar
    I've always been curious about this. Now I wouldn't call myself a programmer yet, but I'm learning, so maybe the answer to this is obvious. It just seems a little hard to believe that with all of our technological advances and the billions of dollars spent on engineering the most unbelievable and mind-blowing software, we still have no other means of protecting against piracy then a "serial number/activation key". I'm sure a ton of money, maybe even billions, went into creating Windows 7 or Office and even Snow Leopard, yet I can get it for free in less than 20 minutes. Same for all of Adobe's products, which are probably the easiest. I guess my question is: can there exist a fool proof and hack proof method of protecting your software against piracy? If not realistically, how about theoretically possible? Or no matter what mechanisms these companies deploy, hackers can always find a way around it? EDIT: So apparently, the answer is no. There's pretty much no way. And so I'm sure these big companies have realized this as well. Should they adopt another sales model rather than charging a crapload for their software (I know its justified and they put a lot of hard work into their software, but its still a lot of money). Are there any alternative solutions that will benefit both the company and the user (i.e. if you purchase our product, we'll apply $X dollars to your account that will apply to future purchases from our company)?

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  • ArchBeat Link-o-Rama for 2012-06-21

    - by Bob Rhubart
    Software Architects Need Not Apply | Dustin Marx "I think there is a place for software architecture," says Dustin Marx, "but a portion of our fellow software architects have harmed the reputation of the discipline." For another angle on this subject, check out Out of the Tower, Into the Trenches from the Nov/Dec edition of Oracle Magazine. Oracle Data Integrator 11g - Faster Files | David Allan David Allan illustrates "a big step for regular file processing on the way to super-charging big data files using Hadoop." 2012 Oracle Fusion Middleware Innovation Awards - Win a FREE Pass to Oracle OpenWorld 2012 in SF Share your use of Oracle Fusion Middleware solutions and how they help your organization drive business innovation. You just might win a free pass to Oracle Openworld 2012 in San Francisco. Deadline for submissions in July 17, 2012. WLST Domain creation using dry-run | Michel Schildmeijer What to do "if you want to browse through your domain to check if settings you want to apply satisfy your requirements." Cloud opens up new vistas for service orientation at Netflix | Joe McKendrick "Many see service oriented architecture as laying the groundwork for cloud. But at one well-known company, cloud has instigated the move to SOA." How to avoid the Portlet Skin mismatch | Martin Deh Detailed how-to from WebCenter A-Team blogger Martin Deh. Internationalize WebCenter Portal - Content Presenter | Stefan Krantz Stefan Krantz explains "how to get Content Presenter and its editorials to comply with the current selected locale for the WebCenter Portal session." Oracle Public Cloud Architecture | Tyler Jewell Tyler Jewell discusses the multi-tenancy model and elasticity solution implemented by Oracle Cloud in this QCon presentation. A Distributed Access Control Architecture for Cloud Computing The authors of this InfoQ article discuss a distributed architecture based on the principles from security management and software engineering. Thought for the Day "Let us change our traditional attitude to the construction of programs. Instead of imagining that our main task is to instruct a computer what to to, let us concentrate rather on explaining to human beings what we want a computer to do." — Donald Knuth Source: Quotes for Software Engineers

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  • Ubuntu 11.10 power management does not recognize removal of power supply!

    - by sema
    I have a Lenovo Ideapad Z370 with Ubuntu 11.10 and the battery status indicator shows wrong information. Problem: The indicator always shows that the power supply is connected, even if it's not connected. The battery charges and discharges normally. However, the status information is wrong. When charging, the "time to charge" decreases, and when discharging the "time to charge" increases. If the power supply is connected the power statistics show: "Supply Yes" "Online Yes" If it is not connected it shows: "Supply Yes" "Online No" My trials: I tried reinstalling the indicator applet, but that doesn't help. Searching for solutions or similar problems didn't point out any help. Background: The problem occured after I switched the battery mode in Windows. (I use a dual boot system.) Lenovo drivers allow a "battery runtime mode" for maximum runtime and a "battery health mode" for maximum battery lifetime. I initially used the runtime mode, tried the health mode for some time, but switched back to the runtime mode. The problem occured after switching to health mode. Does anyone have an idea what is wrong? The problem is relevant for me as I get no information when battery status low and the computer runs out of energy without shutdown or hibernation. This is really a problem for me!

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