4 Element Yagi Wifi Antenna: Simple Yet Efficient

Filed Under (It Services) by Admin on 30-09-2020

By Sean Goudeloc

The four elements Yagi Wifi Antenna is composed of a reflector, a driven element and two directors. It is said, after a series of trials and errors, that the real deal in making this design of antenna is the length of the boom rather than the number of elements a yagi antenna has to be able to gauge its performance. In making this, you will need to consider a lot of specifications.

Four elements Yagi Wifi Antenna is devised for a high or a very high frequency spectrum. The boom length must take into great consideration simply because it holds the key to an excellent performance of the Yagi Wifi Antenna. According to the original creators of the yagi-uda antenna, the boom should measure approximately 0.3857 wavelengths. However, a longer boom is now being done as part of the antenna’s innovations. A measure of 5900 meters or 0.54 wavelengths is used by some antenna lovers to render better results of the antenna.

The average gain of a typical 4 element Yagi Wifi Antenna is about 8.3 dBi or 6.2 decibels but it may vary according to the type of 4 element design. For a 4 element short boom, maximum gain is just about 7 decibels while for a 4 element long boom, maximum gain may reach up to 8 decibels. Moreover, a design made in Italy called the Yagi Optimizer by the Marconi Club yielded a greater amount of gain. They garnered an excellent measurement of 15.66 dBi. The dimensions for the Italy project will be discussed in the latter part of the article.

[youtube]http://www.youtube.com/watch?v=tYjg1v3y87o[/youtube]

As discussed earlier, there are two types of a 4 element Yagi Wifi Antenna, the 4 element short boom and 4 element long boom. For the short boom, the dimensions are the following. The reflector measures about 4570 millimeter, the driven element is about 5020 millimeter, the first director has a length of 5190 millimeter and the second director is about 5460 millimeter. All elements are 22 millimeter thick and have a beamwidth of 85.2 degrees. It also has a front to back ratio of 22 decibels.

For a 4 element long boom, the reflector measures 4935 millimeter; the driven element has a length of 5080 millimeter; the first director is about 5180 millimeter; and lastly the second director measures 5480 millimeter. All of these elements have the same thickness with a 4 element short boom of 22 millimeters. Given with this lengths and thickness, the beamwidth was calculated to be 68 degrees and has a front to back ratio was found to be 30.2 decibels.

Now, for the dimensions of the greatest amount of gain identified in a project in Italy, we have the following configurations. The boom measures 5900 millimeters long; the reflector is about 2708.8 millimeters; the driven element is 2600 millimeters; the first director has a length of 2504.7 millimeters; and lastly, the second director is about 2424.2 millimeters long.

The spacing of each element, reflector being its reference point, are as follows. The reflector being the starting point has definitely no space measurement. The second element or the driven element is about 1044.5 millimeter away from the reflector. The first director has a spacing of 3126 millimeters from the reference point and the second director is 5900 millimeters away from the first element.

There are a lot of variations with the design and its configurations. This thing is a trial and error process in order to attain satisfactory results.

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Australian emergency services personnel exposed to asbestos

Filed Under (Uncategorized) by Admin on 29-09-2020

Wednesday, March 8, 2006

At least 250 members of Australia’s emergency services personnel in New South Wales have been informed that they could die from exposure to fatal levels of asbestos following emergency response training south of Sydney.

Members of the Urban Search and Rescue (USAR) unit are thought to be at risk. They were told last week they may contract life-threatening illnesses following training on a demolition site at Holsworthy Army Barracks. The site was created to simulate rescues in the event of a terror attack or natural disaster. It has been regularly used by emergency services personnel since 2004.

Some of the emergency services personnel spent up to three weeks at a time crawling through the rubble.

Reports claim that when notified last week, senior personnel were left devastated. It can take decades for asbestos related illnesses to appear and can take up to 30 years before those exposed can be cleared of infection.

In addition to the emergency service personnel, doctors, nurses and hazardous material personnel could also be at a mild risk. Even Morris Iemma, premier of New South Wales, who visited the site has been warned he could be at risk.

According to The Daily Telegraph, a repected Sydney newspaper, it has been established that “No proper tests were done at the site before it became a training ground for hundreds of top-level rescuers in 2004″,”Personnel were kept in the dark for up to a year about the asbestos before being told last week”,”NSW public officials and a host of ministers may have been exposed”,”Ambulance chief Greg Rochford and Mr Mullins have been at the site and must face a health clearance”, and”The Dust Diseases Tribunal is conducting an investigation into the long-term impact the mass exposure could have on emergency services in NSW.”

Retrieved from “https://en.wikinews.org/w/index.php?title=Australian_emergency_services_personnel_exposed_to_asbestos&oldid=4510833”

Study finds marijuana use leads to brain development in rats

Filed Under (Uncategorized) by Admin on 29-09-2020

Saturday, October 15, 2005

In the November issue of the Journal of Clinical Investigation,researchers announce that they have found that cannabinoids promoted a generation of new neurons in rats’ hippocampi. The study held true for both a plant-derived and a synthetic cannabinoid. The hippocampus is a part of the brain that contributes to learning and memory. In particular, it has been shown that the hippocampus is essential for the formation of new episodic memories.

“This is quite a surprise, chronic use of marijuana may actually improve learning memory when the new neurons in the hippocampus can mature in two or three months,” said Xia Zhang, with the Neuropsychiatry Research Unit of the University of Saskatchewan.

“Our results were obtained from rats, and there’s a big difference between rats and humans,” added Zhang, “So, I really don’t know yet if our findings apply to humans. But our results indicate that the clinical use of marijuana could make people feel better by helping control anxiety and depression.”

Zhang and his co-workers performed behavioral tests on two purified cannabinoids. The test results indicated that these two cannabinoids have anti-anxiety and antidepression-like effects in rats that may depend on the ability of cannabinoids to promote the production of new neurons in the hippocampus. Marijuana contains a complex mixture of chemicals including cannabinoids and may have somewhat different behavioral effects than the purified cannabinoids tested so far.

Previous studies examining the effects of cannabis have highlighted negative aspects of the drug’s use, such as short term memory difficulties, increased heart rate, nausea, and (in a very small percentage of people) hallucinations. Long term studies about cannabis use tend to be controversial as the data is seen to be biased or flawed. The most agreed upon effect of long term cannabis use is lung damage. However, proponents argue that the correlation between cannabis consumption and lung cancer is misleading suggesting that cannabis use may correlate with tobacco use or that the data is not being properly analyzed.

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Elton John AIDS Foundation Party to mark the 2007 Academy Awards

Filed Under (Uncategorized) by Admin on 25-09-2020

Thursday, February 22, 2007

The 15th Annual Elton John AIDS Foundation (EJAF) party will mark the Academy Awards 2007 to take place this Sunday, February 25th.

The event will be held at the Pacific Design Center in West Hollywood, Los Angeles. Sir Elton John and David Furnish will co-host the party. As for this year’s sponsors – Audi, Chopard and VH1 have offered the Elton John Foundation their support. The Grammy nominated rock singer, James Blunt, has been invited to perform at the event.

The annually held gala is found among the major fund-raising events organized by the Foundation. Taking place on the Oscar Night, the party is also aimed to attract international attention towards the fight against AIDS and promote people’s awareness of the terrifying disease. During the period of the last 14 years the event has raised about $ 125 million to support the Foundation in its activities against AIDS, in particular HIV/AIDS prevention and special direct service programs implemented in 55 countries of the world.

The party to be held for the 15th time this year will include a big expanded dinner, live auction and musical performance. Among the guests of the party there will be entertainment community celebrities, Hollywood stars and Oscar winners, as well as the music industry representatives.

Antony Todd, the leading designer of Antony Todd Inc. based in the New York City and involved into special event-designing, has been commissioned to turn Outdoor Plaza of the Pacific Design Center into to a festive arena staged in a designer rectangular tent.

Retrieved from “https://en.wikinews.org/w/index.php?title=Elton_John_AIDS_Foundation_Party_to_mark_the_2007_Academy_Awards&oldid=4281868”

The Benefits Of Using Professional Ac Contractors In Wichita

Filed Under (Copywriting) by Admin on 14-09-2020

byAlma Abell

Modern central air conditioners are designed to keep you cool, filter air, and automatically maintain temperatures. They need to be expertly installed, maintained, and repaired by AC Contractors in Wichita. Professionals, such as Cook’s Heating and Air Conditioning also offer many benefits.

Professionals Help in EmergenciesProfessional AC Contractors in Wichita area provide 24/7 help. They are full-service HVAC experts, and will respond quickly when your air conditioner breaks down on a hot summer day or your heating system stops on a freezing night. They arrive quickly in well-stocked vans and are able to make many repairs on the spot.

Professionals Keep You HealthyOver time your home’s furniture, carpeting, and air vents collect pet hair, dust mites, mold, and more. The result can be indoor air pollution, which the EPA has identified as a serious health problem. HVAC experts can test home air and offer filters or vent cleaning options to help purify the air. Solutions can include whole-house dehumidifiers and electronic air filters. Contractors will also teach you about the types of filters your HVAC equipment uses and how often to change them.

Professionals Extend the Life of Air ConditionersA/C experts can often make repairs that extend the life of your equipment for years. They also offer service agreements that include spring and fall inspections and maintenance. During scheduled visits technicians clean components, replace refrigerant, and fix any problems that could cause breakdowns. They also inspect your insulation and let you know whether you need to replace it to increase energy efficiency and keep your home more comfortable.

Professionals Save You MoneyHVAC professionals keep your systems running well, which lowers utility bills and saves the cost of expensive emergency breakdowns. They can also explain the advantages of replacing older equipment with a new, energy-efficient system. Experts can supply every major brand and offer professional installation designed to maximize efficiency. They may offer money-saving discounts and will help you qualify for energy-tax credits and rebates.

Today’s HVAC systems must be installed, maintained, and repaired by experts. These professionals offer emergency services, keep indoor air healthy, extend the life of equipment, and professionally install money-saving new systems.

Protestors want ‘carnival not confrontation’ at Forbes conference

Filed Under (Uncategorized) by Admin on 12-09-2020

Thursday, August 25, 2005

The 30A network has said that it wants to create a carnival atmosphere while protesting at the Forbes Global CEO conference. The protest, which starts on August 30, is expected to attract up to 2,000 protesters. Similar events in the past often had instances of violent confrontations between police and some of the activists. The 30A network is a loose affiliation of groups and individuals co-ordinating the protest.

30A spokesman Bruce Knobloch, of the International Socialist Organisation, made the call for a peaceful protest in a press release last week.

“We want a safe community action showing that people in Sydney oppose Howard¹s plan for a US-style wages system, the war in Iraq and his kow-towing to global corporate chiefs. We pose no threat to the Opera House or the millionaire delegates, or to other users of east Circular Quay,” Mr Knobloch said.

The conference will be held at the Sydney Opera House. The Forbes website says that at the event “senior figures from the world’s leading companies and institutions will discuss the best ways to nurture and capitalize on innovation and reveal the latest global trends.” It was recently announced that George Bush Sr will be attending the conference, along with former New York mayor Rudolph Giuliani, Prime Minister John Howard, and former NSW Premier Bob Carr.

Mr Knobloch described the attendees as “a few hundred neo-conservative corporate chiefs”.

The protesters have been denied access to the Opera House forecourt for the duration of the conference. Mr Knobloch believes that this decision is unjustified. He also accused the police of deliberately creating the conditions for confrontation.

“The police seem intent on creating chaos and confrontation, which is the last thing we need. We’ve urged police to build a barrier in front of the Opera House proper and to allow us to use the public space in the forecourt. By pushing us out into the CBD the police are going to create problems for commuters and business owners,” he said.

30A protestors this week organised a media conference outside Surry Hills Police Station, requesting a meeting to negotiate an agreement. According to an article on Sydney Indymedia, police at the station were unable to discuss the issue, but told 30a representatives that they would be contacted to organise a meeting.

“Minimising the protesters right to peacefully rally dramatically increases police powers and strikes at the heart of protesters’ democratic right to peaceful assembly,” the article said.

ASIO has assessed the conference to be “medium risk”, and this has been used by the police and government to justify the increased security.

Retrieved from “https://en.wikinews.org/w/index.php?title=Protestors_want_%27carnival_not_confrontation%27_at_Forbes_conference&oldid=2632623”

Colleges offering admission to displaced New Orleans students/OH-WY

Filed Under (Uncategorized) by Admin on 04-09-2020

See the discussion page for instructions on adding schools to this list and for an alphabetically arranged listing of schools.

Due to the damage by Hurricane Katrina and subsequent flooding, a number of colleges and universities in the New Orleans metropolitan area will not be able to hold classes for the fall 2005 semester. It is estimated that 75,000 to 100,000 students have been displaced. [1]. In response, institutions across the United States and Canada are offering late registration for displaced students so that their academic progress is not unduly delayed. Some are offering free or reduced admission to displaced students. At some universities, especially state universities, this offer is limited to residents of the area.

Retrieved from “https://en.wikinews.org/w/index.php?title=Colleges_offering_admission_to_displaced_New_Orleans_students/OH-WY&oldid=527581”

Get Your Sewer Line In St. Paul, Mn Repaired The Right Way

Filed Under (Online Bohemian Fashion) by Admin on 01-09-2020

byAlma Abell

Sewer line problems can be some of the worst plumbing nightmares. They not only cause an embarrassing smell when lines back up, but they can cause a huge mess in your home when it happens as well. Calling professional services to repair your home’s Sewer in St. Paul, MN is usually the only way to resolve these issues easily, since most over the counter solutions can’t always do the trick. Even at home snaking equipment can fail at times to knock a clog loose when used. Sewer lines can clog easily due to debris such as hair, human waste, food products, dirt, and anything else you rinse or flush down the drains of your home. Most of the stuff that the average family will put down their drains really shouldn’t be there, and can do major damage to their plumbing lines for their Sewer in St. Paul, MN. If you work on cars, and constantly have oil or grease on your hands, rinsing this down the drain can cause clogs in home plumbing systems and can also erode the piping. The same goes for rinsing off muddy shoes, dirt clumps from clothing or shoes, or even rinsing off plates in the kitchen sink that still have a lot of food on them. When a professional plumbing service, such as Drain King, sends someone out, they will come fully equipped to locate, analyze, and resolve your solution using professional grade tools. Most plumbers will utilize video snakes now, so they can easily seek out where a clog actually is and see how bad it is first hand inside the pipe. They also use regular snaking rooters which will push the clog down through the line, not only knocking it loose from the piping, but also breaking it up so it can flow easier down the line. Many homeowners think that using at home chemicals can solve these problems for them, but sometimes all they do is break open a small hole in your Sewer in St. Paul, MN, which allows a small portion of water flow to get past. Having professional plumbers come out and snake your line properly is the only way to clear the line to allow full water flow.

IRA disbands military structure

Filed Under (Uncategorized) by Admin on 01-09-2020

Thursday, October 5, 2006

The Independent Monitoring Commission has reported that the Provisional Irish Republican Army has undergone major changes within their military structure and shows that the IRA Army Council wants to put its military campaign behind it. The Commission consists of John Alderdice, a former Alliance Party leader; Joe Brosnan, former Secretary General of the Department of Justice, Republic of Ireland; John Grieve, former Deputy Assistant Commissioner of the Metropolitan Police and former head of the Metropolitan Police Anti-Terror Branch; and Dick Kerr, former Deputy Director of Central Intelligence Agency.

The report states the IRA no longer has the capacity to mount a military campaign anymore or return to one. The units that have been shut down were responsible for weapons-making, arms smuggling and training. The IRA decommissioned their arms last year.

The report also mentions that the IRA has also put its criminality beyond use and is “clamping down” on criminals within the organization, said Lord Alderdice, as he presented the report. He also added, “That doesn’t mean that criminal activity by all members has stopped but the leadership has made public statements and internal directions, investigated incidents of breach of the policy, even expelled some members and has emphasised the importance of ensuring that business affairs are conducted in a legitimate way.”

Finally, the report added that there is not enough evidence or intelligence to identify who killed Denis Donaldson, a British spy who infiltrated the IRA and Sinn Fein, before revealing his status as a spy.

However, the report added that splinter groups like the Real IRA (RIRA) and Continuity IRA (CIRA) are still threats and are still continuing their activity. The Real IRA was the group behind the deadly 1998 Omagh bombing. The Irish National Liberation Army (INLA) “was not capable of undertaking a sustained campaign [against the British State], nor does it aspire to” according to the report.

It is also noted the creation of two new organizations, Oglaigh na hEireann (Irish Gaelic for “Volunteers of Ireland” and is used by the Irish Defence Forces and the various IRAs.) and the Republican Defence Army. However, the groups are small dissident factions according to the report.

The report also added that the two loyalist paramilitaries, the Ulster Defence Association (UDA) and the Ulster Volunteer Force (UVF) are also beginning to move from violence but at slower pace and not at a grassroots level like the IRA. Another loyalist paramilitary, the Loyalist Volunteer Force

The report was received warmly by Irish Toaiseach Bertie Ahern and British Prime Minister Tony Blair. Ahern, said “These positive and clear-cut findings are of the utmost importance and significance. It is time to make decisions and for Northern Ireland to look to the future.”

“The IRA has done what we asked it to do, and while issues like policing remain to be solved, the door is now open to a final settlement, which is why the talks next week in Scotland are going to be so important.” said Tony Blair in a live statement.

In a surprising reaction, the notoriously hardline leader of the Democratic Unionist Party, Ian Paisley, also welcomed the report. He believes that his party’s pressure is working and if Sinn Fein signs up to policing there could be a deal. Paisley said, “If the police question is settled absolutely on a democratic basis and principle we would have come a long way along the road.”

Sinn Fein leader Gerry Adams said “The DUP don’t have anything other than very limited options. They will or will not participate in power-sharing arrangements. If they don’t participate they are condemning people here, but particularly their own constituents, to second class public services, run by second class fly-in, fly-out British ministers. All the DUP can do is to delay, is to attempt to slow down, but they can’t stop the process of changing.”

Retrieved from “https://en.wikinews.org/w/index.php?title=IRA_disbands_military_structure&oldid=4511284”

Ingrid Newkirk, co-founder of PETA, on animal rights and the film about her life

Filed Under (Uncategorized) by Admin on 25-08-2020

Tuesday, November 20, 2007

Last night HBO premiered I Am An Animal: The Story of Ingrid Newkirk and PETA. Since its inception, People for the Ethical Treatment of Animals (PETA) has made headlines and raised eyebrows. They are almost single-handedly responsible for the movement against animal testing and their efforts have raised the suffering animals experience in a broad spectrum of consumer goods production and food processing into a cause célèbre.

PETA first made headlines in the Silver Spring monkeys case, when Alex Pacheco, then a student at George Washington University, volunteered at a lab run by Edward Taub, who was testing neuroplasticity on live monkeys. Taub had cut sensory ganglia that supplied nerves to the monkeys’ fingers, hands, arms, legs; with some of the monkeys, he had severed the entire spinal column. He then tried to force the monkeys to use their limbs by exposing them to persistent electric shock, prolonged physical restraint of an intact arm or leg, and by withholding food. With footage obtained by Pacheco, Taub was convicted of six counts of animal cruelty—largely as a result of the monkeys’ reported living conditions—making them “the most famous lab animals in history,” according to psychiatrist Norman Doidge. Taub’s conviction was later overturned on appeal and the monkeys were eventually euthanized.

PETA was born.

In the subsequent decades they ran the Stop Huntingdon Animal Cruelty against Europe’s largest animal-testing facility (footage showed staff punching beagle puppies in the face, shouting at them, and simulating sex acts while taking blood samples); against Covance, the United State’s largest importer of primates for laboratory research (evidence was found that they were dissecting monkeys at its Vienna, Virginia laboratory while the animals were still alive); against General Motors for using live animals in crash tests; against L’Oreal for testing cosmetics on animals; against the use of fur for fashion and fur farms; against Smithfield Foods for torturing Butterball turkeys; and against fast food chains, most recently against KFC through the launch of their website kentuckyfriedcruelty.com.

They have launched campaigns and engaged in stunts that are designed for media attention. In 1996, PETA activists famously threw a dead raccoon onto the table of Anna Wintour, the fur supporting editor-in-chief of Vogue, while she was dining at the Four Seasons in New York, and left bloody paw prints and the words “Fur Hag” on the steps of her home. They ran a campaign entitled Holocaust on your Plate that consisted of eight 60-square-foot panels, each juxtaposing images of the Holocaust with images of factory farming. Photographs of concentration camp inmates in wooden bunks were shown next to photographs of caged chickens, and piled bodies of Holocaust victims next to a pile of pig carcasses. In 2003 in Jerusalem, after a donkey was loaded with explosives and blown up in a terrorist attack, Newkirk sent a letter to then-PLO leader Yasser Arafat to keep animals out of the conflict. As the film shows, they also took over Jean-Paul Gaultier‘s Paris boutique and smeared blood on the windows to protest his use of fur in his clothing.

The group’s tactics have been criticized. Co-founder Pacheco, who is no longer with PETA, called them “stupid human tricks.” Some feminists criticize their campaigns featuring the Lettuce Ladies and “I’d Rather Go Naked Than Wear Fur” ads as objectifying women. Of their Holocaust on a Plate campaign, Anti-Defamation League Chairman Abraham Foxman said “The effort by PETA to compare the deliberate systematic murder of millions of Jews to the issue of animal rights is abhorrent.” (Newkirk later issued an apology for any hurt it caused). Perhaps most controversial amongst politicians, the public and even other animal rights organizations is PETA’s refusal to condemn the actions of the Animal Liberation Front, which in January 2005 was named as a terrorist threat by the United States Department of Homeland Security.

David Shankbone attended the pre-release screening of I Am An Animal at HBO’s offices in New York City on November 12, and the following day he sat down with Ingrid Newkirk to discuss her perspectives on PETA, animal rights, her responses to criticism lodged against her and to discuss her on-going life’s work to raise human awareness of animal suffering. Below is her interview.

This exclusive interview features first-hand journalism by a Wikinews reporter. See the collaboration page for more details.
Retrieved from “https://en.wikinews.org/w/index.php?title=Ingrid_Newkirk,_co-founder_of_PETA,_on_animal_rights_and_the_film_about_her_life&oldid=4381126”
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