dustyalbum9747

dustyalbum9747

How does an aeroplane's black box work?

Posted

After doing a little research, I can now tell you (basically) everything you ever wanted to know about black boxes...

In the average commercial aircraft, you'll find the presence of multiple (usually four) microphones in the cockpit at any given time. They are located in the pilot and co-pilot's headsets, as well as in the cockpit itself. Not only do these microphones record conversations between the pilots and cabin crew, they also record any ambient noise (such as switches being thrown or sounds generated by technical issues). The microphones all connect to the cockpit voice recorder (CVR), a master unit that stores the last 30 minutes of sound. The tape operates on a loop, essentially erasing itself every half hour.

This device is known colloquially, but a little misleadingly, as the black box (it is usually quite brightly coloured in order to make it easier to find in the unlikely event of an accident). Another device also referred to as a black box, is the flight data recorder (FDR), which automatically records data regarding the plane's flight path, speed and movements in the air. Although the devices are distinct from one another, the information they record goes to the same place and is used for the same purpose, thus their shared name of black box.

In recent years, manufacturers have moved away from magnetic tape-based CVRs and FDRs and towards solid state technology boxes. These improved devices store the relevant data on memory boards, which can hold up to two hours of cockpit recording and 25 hours of flight data. The solid-state devices are also sturdier than their tape-based counterparts.



Crash survivable memory units (CMSUs), are large cylinders that back up all the relevant data and are designed to withstand extreme heat, pressure and violent impact. They are typically contained within the box itself. In the more severe accidents, the CMSU is all that survives of the black box.

The black box, then, simply records all the relevant data before an accident occurs. This serves to provide engineers with an explanation for a crash, as well as providing investigators and regulators with the same information.

So there you have it, of course, a lot of information is stored in an aircraft's black box (much more than I've detailed here), but as a general example, that's what it is and how it works. Hope that helps.

Can You Recommend The Best Two Way Radios For A School?

Posted

Your best bet, be it for general use in academic studies, health and safety concerns or simply security, would be to employ a digital two-way radio system, something like the Motorola SL4000. I'm specifically suggesting Motorola because they handle jobs like this all the time, several of which are detailed on their website.

In fact, the Motorola website details a case almost exactly like yours, where this technology was employed to great effect.

According to the site, the Cincinnati State Technical and Community College (CSTCC) was in a situation just like the one you outlined in your email. Here's the basic issue...

"CSTCC is comprised of three campuses and over 1.3 million square feet. Until recently, the college used an all-analog system, components of which were 15 years old. According to Raymond Mirizzi, Director of Facilities atCSTCC, "We needed to upgrade our whole communications system," and it was vital that the entire campus be covered with a radio solution that would support very clear, consistent and secure communications".

How a two-way radio network helped the situation is also detailed.

"The three-part campus needed a supervisory channel that would provide the flexibility for critical security officers and related personnel to communicate during times of crisis. Of course, because such emergencies can arise at any time, it was also critically important that the migration from analog to digital proceed smoothly and quickly because even brief downtime could put the campus at risk".

There are lots of companies other than Motorola, of course, but there's no denying that they are giants in their field, with a long history of customer satisfaction. They are something like The 'A' Team in that respect. Still, if your budget doesn't quite allow for bells and whistles, there are a number of quality independent firms that could do a very good job at a slightly more reasonable rate.

The reality here is that bargains are the exception, not the rule. That's why we're always so happy when we get one. By far your best bet is to get an expert to design and implement your faculty's new communications method. It needn't be the biggest company, but you want to spend a good amount on communications, as they really do save lives.

Do Bluetooth Earpieces Cause Cancer?

Posted

The old adage that 'mobile phone emissions can cause cancer' is a commonly held belief that doesn't actually have a huge amount of evidence behind it. Nevertheless, a lot of people genuinely believe that they can/will develop cancer after extensive use of a mobile phone.

Amazingly, this does little or nothing to deter these very same people from using their phones all the time!

To go to the root causes of this belief, we must first talk about the pioneering work of American ophthalmologist (that's an eye specialist) Dr. Milton Zaret. Milton was a giant in his field (and was even unintentionally name checked in a 2013 issue of 'Batman' - no joke). Among Dr. Zaret's most notable accomplishments was his research into the damaging effects that microwave emissions have on the Human eye.

There is a obvious, present and growing danger to the whole population of the UK from contact to the whole non-ionizing segment of the electromagnetic spectrum. The danger can't be overstated because most non-ionizing emission injuries happen clandestinely, usually do not become obvious until after many dormant years, and when they do, the effects are rarely documented.

It seems that there was a lot of political pressure on other researchers to discredit Dr. Zaret and his findings, which resulted in some fairly bad science, but equally in the general notion that Zaret was mistaken. However, his work was never conclusively proved, nor reliably debunked, leaving the case open to interpretation.

Although the emissions that bothered Dr. Zaret (anything from microwave ovens to radar technology) are not exactly the same as mobile phone emissions, the fundamental argument is similar. To date, nobody has been able to prove, or disprove, that mobile phones can cause cancer.

Since the development of mobile phone equipment, studies have been conducted to see if they cause health risks. The fear is rational, given that mobile phones are low-powered microwave emitters, and some microwaves have been revealed to cause health risks. Consumers and Experts agonize that keeping a microwave emitting gadget near your head and/or brain could put you in danger for brain cancer or other harm. The fear is now and again greater in regard to Bluetooth earpieces, as the gadget is located inside your ear and thus even nearer to your brain.

So, the old argument has now been transferred to Bluetooth Headsets (you are by no means the first person to ask this question). The key point being that the earpiece itself is actually much closer to your brain than a mobile phone. However, naysayers simply consider the level of microwave emission produced by the earpiece to be so low as to render the effects negligible.

Essentially, because the widespread use of mobile phones is a relatively recent phenomenon (although it must be said that the first mobile call was actually placed 41 years ago by Marty Cooper), it is simply too early to tell, one way or the other.

Because Bluetooth earpieces are such a new facet, it is not possible to get statistics about continuing effects of constant contact. Some propose that inside 20 years, advanced studies will be presented, as the first generation to grow up using mobile phones and earpieces will in fact be guinea pigs for lasting effects. If you are really worried about the microwave emission from your mobile phone, don't use Bluetooth earpieces and simply use the speaker-phone alternative that is standard on most Mobile phones. even though exact study has not provided comprehensible solutions as towhether Bluetooth earpieces can result in cancer, this may be an area where you feel it is better to be safe than sorry.

In conclusion, it does seem unlikely that your mobile phone can give you cancer. It seems logical enough to assume that we'd all be feeling the effects by now, after nearly two decades of mobile phone use (the second of which actually involved the majority of the population). However, nobody really knows for sure... Dr. Zaret may yet be proven right as the prophet of doom (but, of course, we have to hope not).

Lawyer Honesty: The Requirement Of Truth

Posted

I had a therapist, one to whom meant the world to me. The woman who I called to tell my deepest fears, the most intimate details of my double life, was let in to my world hesitantly. Smoothly, she entered my life. Cunningly, she slipped out of it.



What is it that you want me to do with your story? About all I can figure out is present it unedited on my Examiner.com page, attributed to you, give a background up front on who you are and that we are in Privileged communication, and then get out of the way and paste in what you've told me via email correspondence. That will do two things--it will inform the public and possibly get other news orgs interested in finding out more from you, and it will be additional info for Congressional investigators to start pulling threads from.

An excellent criteria when choosing a legal professional is when accessible he is with a normal day. One common complaint folks have is being unable to communicate with their lawyer. You shouldn't find yourself in trouble wondering what's happening along with your case even though you have a lawyer that's on vacation.

When you prepare material, try to create a sanitized version which can be shared widely and does not impact what is Privileged communication in any way. Now you have two options. Besides placing this document on Lillilooloo, we now have a feature where you can upload a document and place a free - professional - advertisement on the site. Therefore when people see your document, they can also see your advertisement. Lillilooloo attracts like minded professionals and companies, therefore your ad will be seen by the right target audience. The ad is totally free and you can create up to 10 different ads to be used.

Here's something obvious to remember: if you can't understand a question, then you can't answer it. That is obvious, but you will be surprised at how often you are tempted to guess a little what a question means or guess a little about your answer. Since what will come out of the deposition is a transcript of questions and answers, you will get burned if you guess.

Dr. Treacy said, "My most serious concern about this case, and I watched it last night, is the fact that the defense immediately turned around and said Michael Jackson could have killed himself by giving him a syringe of Propofol .



22.When emailing a member of the opposite sex, keep all written business communication professional. Don't flirt by email as this can easily be found out by others.

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dustyalbum9747
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