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Performance Characteristics of Hybrid MPI/OpenMP Implementations of NAS Parallel Benchmarks SP and BT on Large-Scale Multicore Clusters

Master — Wed, 01 Feb 2012 14:26:16 +0000

The NAS Parallel Benchmarks (NPB) are well-known applications with fixed algorithms for evaluating parallel systems and tools. Multicore clusters provide a natural programming paradigm for hybrid programs, whereby OpenMP can be used with the data sharing with the multicores that comprise a node, and MPI can be used with the communication between nodes. In this paper, we use Scalar Pentadiagonal (SP) and Block Tridiagonal (BT) benchmarks of MPI NPB 3.3 as a basis for a comparative approach to implement hybrid MPI/OpenMP versions of SP and BT

Real-Time On-Demand Motion Video Change Detection in the Sensor Web Environment

Master — Wed, 30 Nov 2011 15:25:39 +0000

Detecting motion-based video change, such as different types of motion video or applications using different change detection algorithms in a Web system, is difficult. This paper designs and implements architecture for a real-time or near real-time on-demand motion video change detection system using the Sensor Observation Service (SOS) and the Web Processing Service (WPS) in the Sensor Web environment. Real-time or near real-time includes sensors that obtain motion video data, SOS provides motion video data to WPS and WPS processes this data.

Cross-Network Opportunistic Collection of Urgent Data in Wireless Sensor Networks

Master — Wed, 30 Nov 2011 15:25:38 +0000

Ubiquitous smart environments equipped with low-cost and easily-deployable wireless sensor networks (WSNs) and ever-increasing widespread Mobile Ad hoc NETworks (MANETs) are opening brand new opportunities in environmental monitoring. This paper proposes an original solution for WSN/MANET integration based on the primary design guideline of opportunistically exploiting MANET overlays impromptu formed over the WSN to improve and boost the data collection task of a typical WSN

Lifetime Maximization in Wireless Sensor Networks Using a Mobile Sink with Nonzero Traveling Time

Master — Wed, 30 Nov 2011 15:25:38 +0000

It is a known phenomenon that in a wireless sensor network, sensors communicating directly with a sink deplete their energy faster than the others. As a result, the so-called neighboring sensors can die, disconnecting some of the sinks from the rest of the network, even though most of the sensors are still fully functional. One possible remedy is to balance the relaying load of the sensors using mobile sinks and controlling their mobility, which has attracted the interest of researchers

View iPad and iPhone Space Usage Quickly

admin — Mon, 14 Nov 2011 12:55:01 +0000

Wondering why you only have 2 GB of space left on your iPad or iPhone? Is it too much music, too many videos, too many apps, or something else? You would be surprised at how quickly the data can be eaten up on your iPhone or iPad, especially the latter because of the heavier apps.

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View iPad and iPhone Space Usage Quickly

Dynamically Link an Excel Spreadsheet into a Word 2010 Document

admin — Mon, 24 Oct 2011 11:43:16 +0000

There are times when you’re working in both Word and Excel where you’d like the data that you’re using in Excel to appear in your word document as a table, but you’d also like any changes you make to the Excel sheet to be automatically updated in your Word document. This is possible using dynamic Post from: Dynamically Link an Excel Spreadsheet into a Word 2010 Document

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Dynamically Link an Excel Spreadsheet into a Word 2010 Document

Exploiting Context-Awareness to Enhance Source-Location Privacy in Wireless Sensor Networks

admin — Fri, 30 Sep 2011 14:09:53 +0000

The source-location privacy problem in Wireless Sensor Networks has been traditionally tackled by the creation of random routes for every packet transmitted from the source nodes to the base station. These schemes provide a considerable protection level at a high cost in terms of message delivery time and energy consumption. This overhead is due to the fact that the data routing process is done in a blind way, without knowledge about the location of the attacker

Securely Erase Data from Internal or External Hard Drives on Windows or Mac

Master — Mon, 26 Sep 2011 11:35:57 +0000

Whether you are selling a hard drive and need to delete your data from the drive or simply need a completely clean and formatted hard drive to work with, securely erasing the drive is simple, using some freeware utilities or even some default utilities built-in to Windows or Mac. Erasing a hard drive to the Post from: Securely Erase Data from Internal or External Hard Drives on Windows or Mac

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Securely Erase Data from Internal or External Hard Drives on Windows or Mac

Stop Forgetting Your USB Drive

Master — Tue, 13 Sep 2011 11:19:24 +0000

Almost everyone who owns a USB drive has accidentally left it plugged into a computer somewhere. Forgetting your USB drive means potentially losing all data stored on the drive, but it also leaves the data exposed for anyone to see, since very few people password protect these devices.

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Stop Forgetting Your USB Drive

Back Up Your Google Accounts

Master — Sat, 10 Sep 2011 11:49:45 +0000

Google’s reliability is sometimes unpredictable. Bloggers report being banned from Adsense with no recourse or explanation.

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Back Up Your Google Accounts

Create and Use Formulas in Tables in Word 2010

admin — Sun, 05 Jun 2011 11:12:18 +0000

A lot of people know that you can create and use tables in Word 2010, but not everyone knows that there are some formulas you can use to manipulate the data in the cells in that table you create; somewhat in similar fashion to what you can do with a spreadsheet. To see how this Post from: Create and Use Formulas in Tables in Word 2010

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Create and Use Formulas in Tables in Word 2010

Create and Use Formulas in Tables in Word 2010

admin — Sun, 05 Jun 2011 11:12:18 +0000

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Create and Use Formulas in Tables in Word 2010

View iPhone and iPad Tracking Data

admin — Sat, 23 Apr 2011 11:35:34 +0000

The major news organizations are reporting that all iPhones and iPads running IOS 4, in all its incarnations, has been tracking the exact whereabouts of their users for nearly a year. Apple has not yet released an official press release explaining their motives for such an invasive move, but you can still view the data Apple is collecting. If you use a Mac with Snow Leopard to sync your iPhone, you can easily see the places you have been in the past year on a nifty map.

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View iPhone and iPad Tracking Data

PrePrint: Improving Health, Not Just Tracking It: A Personal Health and Lifestyle Platform

Master — Tue, 19 Apr 2011 18:11:16 +0000

We propose a personal health and lifestyle platform, that is, an active, social instrument to maintain an own, Personal Health and Lifestyle Record (PHLR) and to obtain personalized, lifestyle-related advice to improve health by changing daily habits. We leverage on the data stored in a typical PHR and equip such with environmental and sensor data that enable us to monitor and analyze an individual’s habits. Sharing habits and advices with doctors and friends allows them and the individual to become wellness co-producers and leads to a PHLR that is indeed useful to the individual maintaining it.

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PrePrint: Improving Health, Not Just Tracking It: A Personal Health and Lifestyle Platform

Generate Statistical Data About Your Facebook Friends

Master — Tue, 19 Apr 2011 11:36:39 +0000

Have you ever wondered which of your Facebook friends posts the most photos or the most status updates? Do you know how many of your Facebook friends went to college?

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Generate Statistical Data About Your Facebook Friends

How to Create Form Letters in Word 2010

Master — Mon, 18 Apr 2011 12:31:26 +0000

Sometimes you may want to create a letter that you will be sending to a lot of different people, but you’d like certain parts of it to be individualized to the addressee; parts such as the greeting, name, address, etc.; which means, you want to create a form letter, which is great, because Microsoft over the past several versions of Word has been making it easier to do so.

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How to Create Form Letters in Word 2010

How to Use Live External Web Data in Excel 2010

Master — Fri, 15 Apr 2011 12:10:24 +0000

Oftentimes, users of Excel find they’d like to be able to import data from an external source such as a web page, this is particularly true of web sites that list stock information. What many people don’t know is that Excel does have a facility for doing just this.

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How to Use Live External Web Data in Excel 2010

Link Cells Between Tabs and Workbooks and In Excel 2010

Master — Tue, 22 Mar 2011 12:10:51 +0000

A common thing to do in Excel is to use one sheet for collecting raw data, such as sales totals, and then to use another tab, or even a workbook to create summations or reports; the thing is though, doing so requires you to have to link cells between them. Fortunately, this is a lot easier than it sounds.

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Link Cells Between Tabs and Workbooks and In Excel 2010

Create Pivot Tables With OpenOffice Calc

admin — Tue, 15 Mar 2011 12:12:17 +0000

One of the most popular features of Microsoft Excel is the ability to quickly analyze data using pivot tables. You can take advantage of the same feature in OpenOffice Calc. The only difference is, the pivot table feature is called DataPilot to prevent any copyright infringement with Microsoft

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Create Pivot Tables With OpenOffice Calc

Setup AutoSave in OpenOffice

Master — Sat, 12 Mar 2011 11:40:07 +0000

No one wants to accidentally lose all their work while creating a document. Nothing is worse than a sudden shut down when you’ve forgotten to press Save. Unless you have AutoSave enabled, program glitches, operating system issues or closing the wrong program can all cause you to lose your precious documents and all the time you’ve spent creating them

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Setup AutoSave in OpenOffice

Blacklist Spam Sites from Appearing in Google Search Results in Chrome

Master — Thu, 10 Mar 2011 11:11:10 +0000

Google recognizes that many of the sites it returns in its search results are useless.

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Blacklist Spam Sites from Appearing in Google Search Results in Chrome

Upgrade To Blackberry OS 6 Quickly and Easily

admin — Wed, 02 Mar 2011 12:52:27 +0000

For certain Blackberry owners, OS 6 may be a worthwhile upgrade to take advantage of.

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Upgrade To Blackberry OS 6 Quickly and Easily

Comparing Reputation Schemes for Detecting Malicious Nodes in Sensor Networks

admin — Fri, 25 Feb 2011 16:10:49 +0000

Remotely deployed sensor networks are vulnerable to both physical and electronic security breaches. The sensor nodes, once compromised, can send erroneous data to the base station, thereby possibly compromising network effectiveness

Heuristic Approaches for Transmission Scheduling in Sensor Networks with Multiple Mobile Sinks

Master — Fri, 25 Feb 2011 16:10:48 +0000

A large part of the energy budget of traditional sensor networks is consumed by the hop-by-hop routing of the collected information to the static sink. In many applications it is possible to replace the static sink with one or more mobile sinks that move in a sensor field and collect the data through one-hop transmissions. This greatly reduces the power consumption of the nodes, which can be further reduced by choosing the appropriate moment of transmission

Heuristic Approaches for Transmission Scheduling in Sensor Networks with Multiple Mobile Sinks

Master — Fri, 25 Feb 2011 16:10:48 +0000