The iPhone Sensors

In addition to the touchscreen, your iPhone contains either five or seven important sensors depending on the model. Both the iPhone 3GS and iPhone 4 contain a proximity sensor, an ambient light sensor, a tilt sensor (also known as an accelerometer), a digital compass, and a Global Positioning System (GPS) receiver. The iPhone 4 also adds a built-in three-axis gyroscope and a noise-cancellation microphone to the array of sensors. These sensors give your iPhone some science-fiction-grade features that set it apart from the crowd.Proximity SensorThe proximity sensor is located on your iPhone right near the earpiece. Its job is to blank the screen when the iPhone is held up to your ear. This means your ear and chin won�t accidentally hang up your calls with their stray touches, and it means you�ll...

Should You Police Your Community?

The issue of negative comments is one that every brand who signs up for a Facebook Page has to deal with. Although this could be an issue within a Group, especially if it is around an industry topic that might cause some level of debate, you will more likely feel this concern around Facebook Pages. The reason being, of course, that the comments or content is public. It can be seen by all.Of course, with the hundreds of millions of users, some people have probably had a bad experience with your company. Although in an ideal world only positive information would be talked about publicly by others, this certainly is not the case. Many corporations when I meet with them for the first time are weary of knowing what people are saying about them. What you don�t know can�t hurt you. Right? Wrong....

XtraCharts Main Features

The XtraCharts Suite makes 2D and 3D charting easier than ever. It includes multiple palettes to automatically color your series, so that appearances are never a concern. It can even show a preview of a chart before you've supplied any data for it. You can access any element's settings by simply clicking that element. And there are so many additional automatic adjustments, that it takes little effort to create a smart, professional looking chart.With the XtraCharts Suite you can visualize data stored almost anywhere - from a database to a collection. You can even supply point data directly to a chart which is in unbound mode. And the XtraCharts Suite is extremely flexible, not only with the data it displays, but also in the ways you can output that data. Using the Swift Plot, you can easily...

Beware of Heisenberg

One of the lessons of quantum physics is that the act of observing a system can change the system itself. Computer software isn�t quantum mechanical (not yet, anyway), but we still need to be wary.Instrumenting software intrinsically involves changing it, which raises the specter of affecting, instead of simply observing, its behavior. This is dangerous during diagnosis, because introducing an unintentional change during a series of experiments can easily lead to you draw invalid conclusions.Fundamentally speaking, there is no way that you can guarantee to avoid introducing some side effects. The fact that you�ve modified the source code means that the layout of the object code in memory and the timing of its execution will be affected. Happily, most of the time this remains a purely hypothetical...

What Are the Key Insights of Refactoring?

Many people�s reaction to refactoring when first exposed to it is �so what?� This is just �tidying up� the code, something that programmers have been doing for almost as long as programmers have existed. Certainly, to some extent all that Martin Fowler did when he published Refactoring was to catalog techniques that developers have been using for years.But there�s more to refactoring than just a catalog of useful techniques. It relies on Fowler�s two key insights:� Modifying existing code can be carried out safely only with the safety net of a comprehensive suite of unit tests.� We should never attempt to refactor the code at the same time as modifying its behavior.In other words, you can modify the behavior of the code, or you can refactor it. You should never attempt to do both at the same...

Other Fixed or Mobile Wireless Communications Frequency

� Digital cordless phone: The Digital Enhanced Cordless Telecommunications (DECT) standard in Europe defi nes the use of the frequency band 1880 � 1990 MHz for digital cordless phone communication. In the United States, cordless phones use three frequency bands: 900 MHz, 2.4 GHz, and 5.8 GHz, each of which is also intensively used by other short-range wireless communication technologies.� Global positioning system (GPS): GPS satellites use the frequency bands 1575.42 MHz (referred to as L1) and 1227.60 MHz (L2) to transmit signals.� Meteorological satellite services: The UHF band from 1530 to 1650 MHz (the L band) is commonly used by meteorological satellites, as well as some global environmental monitoring satellites. Part of the UHF and SHF bands are used for military satellite communication.�...

Wireless Data Communication Frequency

� Wireless LANs: IEEE 802.11b operates at 902 � 928 MHz and 2400 � 2483 MHz, and the industrial, scientific, and medical (ISM) radio bands operate at 2.4 GHz in the United States. The IEEE 802.11b operates at 2400 � 2483 MHz in Europe, and at 2400 � 2497 MHz in Japan. IEEE 802.11a and HiperLAN2 use 5150 � 5350 MHz and 5725 � 5825 MHz, and the unlicensed national information infrastructure (U-NII) band operates at 5.8 GHz in the United States. They operate at 5150 � 5350 MHz and 5470 � 5725 MHz in Europe, and at 5150 � 5250 MHz in Japan. � Bluetooth: A total of 79 1-MHz channels are allocated from the unlicensed 2.402 �2.480 GHz in the United States and Europe for Bluetooth signal transmission. Other countries may have fewer channels but all fall into the 2.4-GHz band. � WiMax: A wide range...

Cellular Communication Frequency

� Global system for mobile (GSM): The two frequency bands used by GSM are 890 � 960 MHz and 1710 � 1880 MHz. They are sometimes referred to as the 900-MHz band and the 1800-MHz band.� Code-division multiple accesses (CDMA): The IS-95 standard defines the use of the 800- and 1900-MHz bands for CDMA cellular systems.� 3G wideband CDMA (WCDMA)/universal mobile telecommunications system (UMTS): Three frequency bands are allocated for 3G UMTS services: 1900 � 1980 MHz, 2020� 2025 MHz, and 2110� 2190 MHz.� 3G CDMA 2000: This system reuses existing CDMA frequency bands.Source of Information : Elsevier Wireless Networking Complete 2010 ...

Facebook Page or Group: Which One?

It might be a bit confused trying to figure out how to properly brand your company on Facebook and start engaging with your prospects, customers, employees, and fans. Both the Pages and Groups features within Facebook have many benefits. Which one should you choose and why?Generally, if you�re a brand, organization, celebrity, politician, or other public figure, and you want to engage with your prospects, customers, and fans, you want to set up a Facebook Page. Pages are public. That means that all features of the Page can be seen without having to become a fan of it. Everyone can join your Page and can promote it into their news feed. Furthermore, the available features and level of customization is unparalleled when comparing it with the capabilities of Groups. This isn�t because Facebook...

Public Media Broadcasting Frequency

� Amplitude modulation (AM) radio: AM radio stations operate at a frequency band between 520 and 1605.5 KHz.� FM radio: It uses the frequency band between 87.5 and 108 MHz.� Shortwave (SW) radio: SW radio uses frequencies between 5.9 and 26.1 MHz within the HF band. The transmission of shortwave radio over a long distance is made possible by ionosphere reflection. HAM amateur radio, a popular activity enjoyed by over three million fans worldwide, relies on the HF band to communicate across the world.� Conventional analog television: A quite small slice of VHF (30 � 300 MHz) and UHF (300 � 3000 MHz) has been allocated for analog television broadcasting. In the United States, each channel occupies a 6-MHz band. The first VHF channel, channel 2, operates at 54� 60 MHz, whereas the last UHF channel,...

DevExpress XtraGrid Features

The following is a summary of the features available to you in the XtraGrid Suite, the must-have component library for .NET.Data Specifics� Full ADO+ Support - The XtraGrid takes full advantage of ADO+. Using this data access architecture and the separation of internal data modules from data presentation, the XtraGrid does not use any extra buffers in any of its modes. Even when grouping columns, the XtraGrid will use a minimum of memory and perform the operation as fast as the data source can supply the data.� Support for Data Lists - The XtraGrid works with any source which supports the IList, ITypedList or IBindingList interface plus all inherited interfaces.� Unbound Columns - It's possible to combine bound and unbound data modes. Just add unbound columns and supply data via an event....

Should I Leave My Logging in the Code?

Some topics are guaranteed to create an argument among developers, and logging is one of them. If you�ve added logging to the code to help while tracking down a problem, it�s tempting to leave this instrumentation in place so that you can find the problem again quickly if it happens again. This is especially true if you�re using a logging framework that allows it to be enabled and disabled easily. What�s not to like?So, why the controversy? Detractors will tell you the following:� Logging obscures the code, making it difficult to see the wood for the trees.� Logging can suffer from the same problems as comments�as the code evolves, often the logging isn�t updated to match, meaning that you can�t trust what it says and making it worse than useless.� No matter how much logging you add, it�s...

The iPhone Language

The ways in which you touch your iPhone screen are the words in your communication vocabulary. Here�s a quick rundown of the many ways you can speak to your iPhone:� Pressing the Home button: The iPhone�s Home button lives below the touch screen and is marked with a white or gray square. Press the Home button at any time to return to your Home screen with its list of applications. Double-pressing the Home button displays icons in a row at the bottom of the screen for all apps that are currently running and, with a flick to the right, displays a set of controls for operating the iPod app.� Tapping: Tap your iPhone by touching your finger to the screen and removing it quickly. Tapping selects web links, activates buttons on the screen, and launches iPhone apps. When typing text on the iPhone�s...

Accessorizing Your iPhone

The iPhone accessory business is a huge and thriving economy. A visit to the iPhone accessories pages on the Apple online store shows a fraction of the iPhone cases, cables, docks, and other accessories that have been developed. If you purchase your iPhone in an Apple Store, your Apple sales associate will show you many accessories that are available for it. These accessories are from Apple and third-party sources, and they provide your iPhone with protection and added functionality. Let�s talk about some of the accessories that can make your iPhone experience more pleasant and fun.iPhone Bumpers and CasesOne of the most popular categories of products for the iPhone consists of cases or, in the case of the iPhone 4, bumpers. A case is exactly what it sounds like�something that encases the...

Developing a Corporate Facebook Presence

Besides the individual choice of whether to join Facebook and blend your personal and professional lives, the reason why, as a brand, you want to consider establishing a presence on Facebook is because it helps to humanize your brand. Facebook is a very personal social network. It provides the perfect opportunity to help humanize your brand. Through the types of content that you can choose to share on a Facebook Page or Group, you can show that your company is a lot more than just a logo. You can peel back that logo to expose all the great personalities that make up your company.Facebook is a thriving community, in which there are sure to be fans of your company, executives, product, or service. If you�re shaking your head left and right yelling loudly that you don�t have any fans, realize...

Facebook: Personal or Professional?

Facebook has, for most of its history, been seen as a personal social network. On Facebook you can let your hair down a little and interact with your college buddies, family, and close friends. You share pictures and videos from recent vacations or of your baby�s first steps. You post your personal opinions on random topics such as your favorite pizza toppings or who/what is annoying you today. If you want to do any business networking, there is LinkedIn. On LinkedIn you can input your resume, get recommendations, and set up a Group around your company, product, service, or industry and several other business-related activities. The problem here, as is the case with every other social network currently, is that Facebook is growing at such a fast pace that you can�t ignore it. Facebook is currently...

RadTreeView - The FindByTextCommand

RadTreeView provides a command called FindByTextCommand. The command looks for nodes which have the same Text property as the specified command parameter.Here is an example of how to use the FindByTextCommand:[C#] Using the FindByTextCommandTelerik.WinControls.Commands.FindByTextCommand cmd = new FindByTextCommand();List<object> result = RadTreeView.ExecuteBatchCommand(this.radTreeView1.Nodes, -1, cmd, "MyNode");if(result != null){ // Found nodes.} [VB] Using the FindByTextCommandDim cmd As Telerik.WinControls.Commands.FindByTextCommand = New Telerik.WinControls.Commands.FindByTextCommandDim result As List(Of Object) = RadTreeView.ExecuteBatchCommand(Me.RadTreeView1.Nodes, -1, cmd, "MyNode")If Not result Is Nothing Then 'Found nodes.End If ? Dev Components ? RadControls for WinForms...

RadTreeView Commands Overview

RadTreeView implements the Command pattern which allows adding functionality, which operates on RadTreeNodes, without needing to modify the code of RadTreeView. This makes it easy for developers to create their own commands should they find that the commands, which RadTreeView provides, are insufficient.RadTreeView exposes two methods with two overloads each, which accept commands to execute. The methods are called ExecuteScalarCommand() and ExecuteBatchCommand(). The difference between those two methods is that ExecuteScalarCommand() works on a single RadTreeNode whereas ExecuteBatchCommand() works on many nodes. For example, if a command which searches for a node with specific text, is passed to ExecuteScalarCommand() only one node will be found and returned. Passing it to ExecuteBatchCommand...

Telerik RadTreeView Key Features

Telerik RadTreeView is the supercharged tree view component for Windows Forms. It facilitates display, management, and navigation of hierarchical data structures. The product offers many advanced features like drag-and-drop, load on demand, context menus and data binding. RadTreeView features an extremely rich API, allowing you to achieve complex behavior in your applications. The skinning support nicely blends RadTreeView into the interface of your application.� Drag & dropRadTreeView supports drag and drop within the same tree and between RadTreeView controls. The position indication cursor provides feedback to the user so that nodes can be dropped above, below or within a given node. When dragging to a hidden or collapsed node the control will scroll up/down and automatically open the...

Facebook�s Privacy Policy

As with any large social network, Facebook has developed, and continues to iterate, a set of policies that are the guiding rules of the network. The privacy policies and terms of services are put into place as a way to govern the large social network.When Facebook originally started out, the network was private. Essentially all information was opt-in only. To view any information other than some basic data points and a bio picture, you had to be �friended� by the individual to see other information. But, over time, Facebook tweaked the platform and eventually moved toward a more open network. Information was still all opt-in, but these updates allowed users the option of whether they wanted to expose some, or all, of their information to Facebook search results and external search engines....

RadGridView Logical vs. Visual Grid Structure

The grid can be thought of in terms of both logical and visual. The logical layer allows you to traverse grid meta data and data, i.e. templates, groups, columns, rows and cells. The visual aspect of the grid deals with the Telerik Presentation Foundation (TPF) elements that are drawn on the screen. RadGridView events such as CellFormatting allow you to manipulate the visual aspect of the grid.Logical Grid StructureRadGridView has a logical structure that uses collections of objects such as GridViewRowInfo and GridViewCellinfo to represent elements of the grid. The outline below shows the general structure of the logical layer:GridViewTemplate (MasterGridViewTemplate)- RootGroup (RootGroups)    - Rows (GridViewRowInfo)   - Groups (DataGroup)- Columns (GridViewColumn, GridViewDataColumn)-...

Word 2011 for Mac

Significant update to Microsoft's flagship Mac word-processing app"Word 2011 now makes it possible to insert a Mac into almost any business environment"It's always been difficult to see any kind of relationship between Word for Mac and Word for Windows, beyond the name and file format. They were essentially two different products designed for what, in Microsoft's mind, were two different sets of users Word for Mac 2011 changes all that. It's a significant and substantive update that unifies a user's experience across platforms It also contains many valuable new features and improvements - more than 30 in all. More importantly, Word 2011 now makes it possible to insert a Mac into almost any business environment and offer Mac users the same set of features found in Word for WindowsRibbon and...

Overview of RadGridView Structure

RowEach row in RadGridView is represented by GridRowElement class.HeaderRowThe header element is represented by GridHeaderRowElement class.Add New RowDepending on the value of GridViewTemplate.AddNewRowPosition property, the new row element appears below the header row or after the data rows.FilteringRowFilteringRow appears automatically when you have Filtering enabled by setting RadGridView.EnableFiltering or GridViewTemplate.EnableFiltering properties.GridViewIndentColumnThis column appears when the grid data is grouped or there is a hierarchical structure to facilitate the expand/collapse functionality. The expand column is always placed in front of all other grid content columns and cannot be moved.GridViewDataColumnDisplays a column bound to a field in a data source.MasterViewTemplateMasterViewTemplate...

Gnome Census Results

At GUADEC 2010, Neary Consulting revealed the results of its Gnome Census, a report that studies who contributes to the Gnome project. The study found that some 70 percent of contributors are unpaid, but that the majority of paid commits come from paid participants. Seventy percent of contributors work on the project in their spare time, while an additional 20 percent of contributors do so on both a paid and voluntary basis. The study also looked at commercial developers� contributions to Gnome. In the information collected, Red Hat had the highest percentage of contributions to the project with 16.30 percent. Immediately followed by Novell with 10.44 percent. The study stated that Red Hat�s ranking isn�t much of a surprise, considering the company employs 16 of the top 40 Gnome contributors....

Mac Pro 2.66GHz 12-core

Apple's most expensive Mac, but does that mean it's the fastest?Apple released three new Mac Pro models in August. The �1 ,999 2.8GHz quad-core model and the �2,799 2.4GHz quad-core (x2, eight cores total) model. Here we will assess Apple's 12-core Mac Pro . At �3,999 this is Apple's most expensive off-the-shelf Mac, but does that mean it's the fastest Mac money can buy?This flagship model has two 2.66GHz 6-core Intel Xeon Westmere processors (twelve cores in total) with 6GB RAM, a 1TB hard drive, and the same 1 GB ATI Radeon HD 5770 graphics card as the other 201 0 Mac Pros. Our Macworld system performance test suite, Speedmark 6.5, results show it to be considerably faster than Apple's other standard Mac Pro models released this year, achieving a Speed mark 6.5 result of 261 compared to...

Telerik RadGridView Key Features

RadGridView is a grid component developed on top of Telerik Presentation Framework which provides a combination of performance, extensibility, customizability, and ease of use.RadGridView Key Features1. Hierarchical data presentation - RadGridView has the ability to represent hierarchical master-detail data. Its hierarchical schema could be set up either at design-time, at runtime using the control API, or handled automatically for you based on the structure of the data. Easily customizable theming mechanism - RadGridView is shipped with a consistent set of themes that allow you to easily build slick interfaces. Or you can use the codeless visual approach to build a new custom theme.2. Grouping - RadGridView allows easy implementation of multilevel grouping of data from a single table. Simply...