How to fix all your Facebook 'mistakes'

Highlights

• The Activity Log in Facebook is worth exploring
• To find Activity Log, click on drop-down menu on the far righthand side of the toolbar
• You can also get to it by adding "/allactivity" to the end of your Facebook URL
• You can delete posts, unlike posts, hide updates from your profile

You may not yet have stumbled across the Activity Log page in your wanderings around Facebook, but it's worth exploring. It provides a blow-by-blow account of everything you do on the social network, and you can use it to take back likes or comments, find your favorite posts again, change your privacy settings and more.

To find the Activity Log, click on the drop-down menu on the far righthand side of the toolbar at the top of the interface. You can also get to it by adding "/allactivity" to the end of your Facebook URL (don't worry, no one else can get to it.) Your most recent activity is shown first.

Indian scientist develops software for cancer patients

An Indian scientist in the US has developed a new MRI-based technique to predict survival of patients with aggressive brain tumours and help them provide personalized therapy.

Dr Pallavi Tiwari's work is based on recent clinical findings that 90% of the Glioblastoma Multiforme (GBM) recurrences occur close to the tumour margin, suggesting that malignant cells are present at the periphery of the tumour but are not visually discernible.

GBM is the most common and most aggressive cancer that begins within the brain.

"Less than 5% of all GBM patients live for more than five years," Tiwari, a leading cancer researcher working at Case Western Reserve University, said.

She said that despite several advances in drug discovery and clinical trials for cancer treatment, all GBM patients still follow the same 'one-fits-all' treatment regimen.

Tiwari, who is from Madhya Pradesh, presented her new research before at the Radiological Society of North America (RSNA) meeting recently.

"With Obama administration's push for personalised therapy, a pressing need in precision medicine is to identify patients with GBM who are suitable for specific clinical trials based on their tumour characterisation, instead of a 'one-size-fits-all' treatment," a media release said.

Unfortunately, this has not been feasible so far in the absence of reliable non-invasive and quantitative measurements regarding patient prognosis (likely outcome of the disease) in GBMs, Tiwari noted.

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Tiwari and her team have shown on 62 patients that these computer-extracted features from tumour margins and its surrounding areas on MRI are together predictive of GBM outcomes, the press release said.

Understanding WiMAX Technology

WiMAX actually stands for Worldwide Interoperability for Microwave Access, and is a wireless communication standard. Of the standards currently being developed for 4G it is the closest in practice to current Wi-Fi, though it provides several notable advantages. WiMAX was developed in 2001 and is described by the WiMAX forum as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL". This “last mile” refers to the often difficult process of getting access to a consumer from a local data station, be it in the form of a telephone cable, wireless device or other broadcasting technology.

What is WiMAX?

While it operates using many of the same fundamental principles as Wi-Fi networks, it offers a far greater signal range than the 100 feet provided by most conventional Wi-Fi modems. Instead, WiMAX boasts a 30 mile radius, large enough to cover portions of major cities. In addition, this standard is intended to provide 30 to 40 megabits per second as a transfer rate, with a 2011 update to the standard yielding up to 1 gigabit per second at fixed points. It should be noted, however, that bandwidth on a WiMAX network is not exclusive to users and instead must be split, meaning that while higher speeds may be advertised, the number of users can lower transfer rates in practice.
WiMAX uses IEEE 802.16 wireless network standards that are interoperable, as compared to the IEEE 802.11 standards used by wireless LANs. The original standard, as mentioned above, was developed in 2001 and borrowed some of its technology from a service known as WiBRO, used in South Korea. This standard is sometimes referred to as “Wi-Fi on steroids” for its ability to far outperform Wi-Fi transfer rates and signal distance, and gained significant ground in the market with the deployment of Mobile WiMAX, based on 802.16e-2005, and which led to the 802.16e-2011 revision and higher data transfer rates.

How to use a Phone as a Mobile Hotspot

I am using a Samsung Galaxy and the directions will vary depending on the phone you use but they are basically the same. I go to Settings > More Networks and then click on Tethering and Portable Hotspot to get to the following screen:

Put that little button to the On Position to get things going. You will get a warning that turning on the portable Wi-Fi hotspot will turn off the Wi-Fi, just click OK. Then you will be asked to configure it to your liking including naming it and adding a password then you will see the following screen telling you how to connect other devices.

Then go to the Network settings on your computer or device and click connect to your named hotspot and that is it. Just be aware that the hotspot is a battery drainer on the phone so plug it in if possible and you will be using data from your wireless plan.

Checking the Wi-Fi status shows the connection to the hotspot at a speed of 73Mbps. That is a tad bit short of the 100Mbps that 4G is at least supposed to be able to achieve and a far cry from the 1Gbps that 4G is supposed to be able to deliver. But it is still not a bad Internet connection in today’s standards.

WIFI ROUTERS

FEATURES

1. One or multiple NICs supporting Fast Ethernet or Gigabit Ethernet integrated into the main SoC
2. One or multiple WNICs supporting a part of the IEEE 802.11-standard family also integrated into the main SoC or as separate chips on the printed circuit board. It also can be a distinct card connected over a MiniPCI or MiniPCIe interface.
   • So far the PHY-Chips for the WNICs are generally distinct chips on the PCB. Dependent on the mode the WNIC supports, i.e. 1T1R, 2T2R or 3T3R, one WNIC have up to 3 PHY-Chips connected to it. Each PHY-Chip is connected to a Hirose U.FL-connector on the PCB. A so-called pigtail cable connects the Hirose U.FL either to a RF connector, in which case the antenna can be changed or directly to the antenna, in which case it is integrated into the casing. Common are single-band (i.e. only for 2.4 GHz or only for 5 GHz) and dual-band (i.e. for 2.4 and 5 GHz) antennas.
3. Often an Ethernet switch supporting Gigabit Ethernet or Fast Ethernet, with support for IEEE 802.1Q, integrated into the main SoC (MediaTek SoCs) or as separate Chip on the PCB.
4. Some wireless routers come with either xDSL modem, DOCSIS modem, LTE modem, or fiber optic modem integrated.
5. IEEE 802.11n compliant or ready.
6. Some dual-band wireless routers operate the 2.4 GHz and 5 GHz bands simultaneously.
7. Some high end dual-band wireless routers have data transfer rates of at most 300 Mbit/s (For 2.4 GHz band) and 450 Mbit/s (For 5 GHz band).
8. The Wi-Fi clone button simplifies Wi-Fi configuration and builds a seamless unified home network, enabling Super Range Extension, which means it can automatically copy the SSID and Password of your router.^[1]
9. Some wireless routers have 1 or 2 USB port(s). For wireless routers having 1 USB port, it is designated for either printer or desktop/mobile external hard disk drive. For wireless routers having 2 USB ports, one is designated for the printer and the other one is designated for either desktop or mobile external hard disk drive.
10. Some wireless routers have a USB port specifically designed for connecting mobile broadband modem,^[2] aside from connecting the wireless router to an Ethernet with xDSL or cable modem. So, can be inserted a mobile broadband USB adapter into the router to share the mobile broadband Internet connection through the wireless network.

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What is a Mobile Hotspot?

Mobile Hotspots: Internet On-the-Go

Mobile hotspots are a recent technology that allows you to connect your Internet-capable devices to the Internet through a wireless, portable device. The hotspot forms an on-the-spot Wi-Fi network, and you can connect a number of computers or gadgets to the network for simple, fast Internet access.
Hotspots can find Internet connections throughout most of the United States by using the 3G and 4G networks set up by major providers. You can use any Wi-Fi capable device with a mobile hotspot, including most laptop computers, tablets and Smartphones. To use your hotspot, you will power it on and use your computer's Wi-Fi adapter to find the network, although some providers offer small USB hotspots that connect directly to your computer.
Mobile hotspots and smart phones use the same types of data networks. 4G mobile hotspots are an especially popular option, since they offer connection speeds roughly equivalent to home broadband connections. You can even turn your phone into a mobile hotspot.
If you are considering a buying a 4G mobile hotspot for your next trip or vacation, here are a few important things to know before making your purchase.

Types of Mobile Data Connections

All mobile hotspots offer broadband Internet, which means that they provide a relatively fast and consistent connection. There are several types of wireless mobile network technologies, but the two most common are 3G and 4G.
These terms stand for "third generation" and "fourth generation" respectively, and they are important terms to understand when choosing a mobile hotspot. The two technologies vary in terms of speed and coverage area.
3G networks provide a consistent connection to the Internet with a minimum speed of 144 kilobits per second (Kbps). This means that you could download 18 kilobytes of information per second, equivalent to a small image or a simple web page. Most 3G networks are significantly faster, however; 144Kbps is simply a baseline for the technology.
The standards of 4G networks are a bit confusing, but on any given network, 4G speeds are generally at least twice as fast as 3G. However, it is important to note that network speeds vary from one carrier to the next. If you use AT&T, for instance, you will notice a major difference between 4G and 3G connections, but the speeds are not necessarily in line with the speeds of other providers.
4G networks are more common than 3G networks. However, wireless providers are rapidly expanding the reach of their networks, and all 4G mobile hotspot products can also access 3G. If you are interested in a 4G mobile hotspot, you should find out about average connection speeds on different networks before choosing a provider.

4g TECHNOLOGY

                                                                        4G, short for fourth generation, is the fourth generation of mobile telecommunications technology, succeeding 3G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, 3D television, and cloud computing
Two 4G candidate systems are commercially deployed: the Mobile WiMAX standard (first used in South Korea in 2007), and the first-release Long Term Evolution (LTE) standard (in Oslo, Norway and Stockholm, Sweden since 2009). It has however been debated if these first-release versions should be considered to be 4G or not, as discussed in the technical definition section below.^{[citation needed]}
In the United States, Sprint (previously Clearwire) has deployed Mobile WiMAX networks since 2008, while MetroPCS became the first operator to offer LTE service in 2010. USB wireless modems were among the first devices able to access these networks, with WiMAX smartphones becoming available during 2010, and LTE smartphones arriving in 2011. 3G and 4G equipment made for other continents are not always compatible because of different frequency bands. Mobile WiMAX is not available for the European market as of April 2012