domingo, 14 de dezembro de 2014

Definition of Brain

 

Snap 2014-12-14 at 21.40.27

Inside a Jet Engine

 

At takeoff, a jetliner engine can move 1.25 tons of air per second. That’s enough power to suck all the air out of the largest football stadium in less than a minute! Here’s a basic look at incredible jet engine technology with the turbofan engine.

 

source :www.animagraffs.com

9 things I wish people understood about anxiety

 

 

About five years ago, I was diagnosed with an anxiety disorder. This did not come as much of a surprise to me, since for the previous two decades, I had spent my time freaking out about any number of things. Some of my fears were rational, and some were less so, but all of them had one thing in common: they had a level of control over me and my day-to-day life that fell outside the range of normalcy.

Since then, I've expended a lot of energy working out the best ways to manage my anxiety. As with most endeavors, there have been some successes, some failures, the occasional moment of unintentional hilarity, and — by the very nature of the beast — a few panic attacks. I like to think that these days, I pretty much know the ropes. But if there's one thing I could change, it's not the anxiety itself, nor even the ease and availability of treatment. It's how often I find myself in tense, uncomfortable, or painful situations with people who just want to help; it's how often I find myself thinking, "Man, this whole thing would be so much easier if you just understood a little more about anxiety."

So, without further ado, here are the top nine things I wish I could magically make the whole world understand about anxiety and those who live with it.

*Anxiety does not move in a straight line


For folkswho move through life without an anxiety disorder, I imagine fear and panic as emotions that are pretty straight-forward: something happens, or is projected as going to happen, that causes an apprehensive or frightened response. But for a person with an anxiety disorder, things don't work that way. Perhaps this is best illustrated by example. Let's think of something minor — like, say, losing your car keys. That would of course be frustrating for anyone. A person without anxiety might think something along the lines of, "Oh no, what a hassle!," or maybe even, "Oh no, this is going to screw things up for me for a few days!" But for someone with anxiety? Well, that train of thought might look more like this: "Oh no, my car keys are gone! What if I don't find them? What if I try to get them replaced but it's not possible or it takes forever and something happens and I need my car and I can't get in it? What if the thing that happens is that I need to drive someone to the hospital? What if that person is my best friend? What if they're dying and the only way to get them to a hospital is my car and my keys are still gone? Oh, god, I LOST MY CAR KEYS AND NOW MY BEST FRIEND IS GOING TO DIE AND IT'S ALL MY FAULT."

This brings me fairly neatly to my second point:

*Anxiety is not rational, and boy, do we know it

Like, seriously, I promise you: we know. You really cannot spend all day every day listening to the thoughts of an anxious person and not know that a large portion of those thoughts make approximately no sense at all. Just last week, I found myself worrying that my parents would look at the person I was and decide they hated me, despite knowing to the depths of my soul that is not something that would ever occur. This is one of the most frustrating things about having an anxiety disorder: knowing as you're freaking out that there's no reason to be freaked out, but lacking the ability to shut the emotion down. A therapist of mine once compared it to having a faulty alarm system wired into your brain — rather than going off only when something is really dangerous or scary, the anxious person's mental landscape will fall to chaos over all manner of things, however tiny or inconsequential. In fact, sometimes the thing that causes the reaction is so tiny or inconsequential that even we don't know what it was. Other times, something that has caused a reaction in the past is a total non-event in the present.


*With anxiety, some days are good days, and some days are bad days

I mean, don't get me wrong — this is true of life in general. But I mention it because it's the thing I most often find myself wishing everyone in my life already knew: some days are good anxiety days, and some days are bad anxiety days, and whether I'm having a good anxiety day or a bad anxiety day is going to affect the way I react to the things and people around me. If, for example, I'm having a bad anxiety day, and somebody in my life gets angry at me? There's a pretty decent chance that I'm going to either a) have a panic attack, b) burst into tears, c) say anything I can think of to make their anger go away, or d) all of the above. Of course, I can't (and don't) expect the people in my life not to get angry at me, or to only get angry at me on specific day; sometimes I do things wrong, and make people angry, and that's normal, and healthy, and okay. But I wish it was also considered normal, and healthy, and okay for me to say, "Hey, I'm having a bad anxiety day, can we do this another time," and trust that the person I'm saying it to knows it's not a cop-out or an excuse so much as a delay — and a request for kindness.

*Anxiety is physically painful

Of course it's emotionally painful, too — in fact, I'd argue that the emotional pain is the worst of it — but most people know that part, and not this one. So: surprise! Anxiety hurts. Panic attacks are the pinnacle of the physical pain piece for most of us, since so much of that experience is centered around the sensation that your chest is tightening to the point that you can't breathe. But anxiety can also cause headaches, nausea, heart palpitations, muscle tension, insomnia, dizziness, and exhaustion. There are people who have deeply painful gastrointestinal responses to anxiety (ever heard the phrase "tying your stomach up in knots?"); there are people who, when anxious, hold their muscles so rigidly that they end up pulling or tearing them. It hurts. It doesn't hurt the same way for everyone, but it hurts. And that brings me to:

* Not all anxiety is created equal

I, personally, have generalized anxiety disorder — or, as I like to think of it when we're at home, "everything everywhere all the time always disorder." But anxiety comes in many different varieties and flavors, and so do people's experiences of it. Some people suffer from generalized anxiety; some people deal with social anxiety; some people have specific phobias. Some people come by anxiety genetically; some people develop anxiety as the result of a specific event; some people have anxiety due to their brain chemistry. Some people have been anxious all their lives; some people develop anxiety as a teen or adult; some people eventually overcome anxiety, or at least figure out how to manage it to the point that it's negligible. Some people medicate their anxiety, and some people don't. Some people see a therapist to help them with their anxiety and some people don't.

* Anxiety and depression are linked

Not all anxious people have depression; not all depressed people have anxiety. But they are known within the mental health community as common companions — and, in fact, one can lead to the other. If, for example, some hypothetical person with an anxiety disorder had the tendency to freeze up when overwhelmed, and had difficulty reaching out to the people in their life when that happened, then that hypothetical person could, hypothetically, remain frozen for long enough that eventually the anxiety (and all their other feelings) could bleed away and leave just the stagnation — in other words, depression. You know, hypothetically. That could occur.

The reason this is on this list isn't because I think people don't know about it. I actually think it's fairly common knowledge, or at least it is in the communities I travel in. It's because I want you, reader, to understand that we know. We the anxious are typically super aware of the fact that there's a link between anxiety and depression, and — shockingly — it's safe to assume we're pretty anxious about it. For those of us who have experienced a depressive episode in the past, it's even more likely that we're quietly freaking out on a pretty regular basis about the chance of that happening again (which, actually, is a rational fear, as your likelihood of experiencing a depressive episode increases with every time you have one). Probably don't bring it up out of the blue, is what I'm saying here. That, and keep an eye out for it if you can; as freaked out as an anxious person might be about getting depressed, it's really difficult to notice a depressive episode once you're actually inside of it.

* Unless you've been given explicit permission, when it comes to someone else's anxiety, you should probably listen instead of talk

You know how it's okay when you say something nasty about a member of your family, but if someone else does it, you're going to come down on them like a ton of bricks? This is like that. I can talk about how exhausting or infuriating I find my anxiety, but if you do that, it's probably going to hurt my feelings; I can say that I wish I didn't have anxiety, but if you say that, I'm probably going to think you're an asshole.

Also — and man, do I wish this went without saying — it's never okay to talk to about someone else's mental health issues with a third party, unless you've been given explicit permission to do so, or if your relationship with that third party is one involving legally enforceable confidentiality (your therapist, your lawyer, et cetera). Just because someone has told you something about themselves does not mean they're comfortable with everyone else knowing it. I, obviously, am comfortable with everyone on earth knowing that I'm a nervous wreck, because I would not be writing articles on the internet about it I wasn't. But mental health issues, anxiety included, are still heavily stigmatized in any number of communities, and there are a lot of people who aren't at all okay with people finding out about their struggles. There are even people for whom that's an active anxiety trigger. So, you know. Don't do the thing.

* As frustrating, infuriating, agonizing, and exhausting as it can be, our experiences and struggles with anxiety are part of us, and we wouldn't be the people we are without them

This is actually something I think people with anxiety, myself included, really struggle to understand. We spend so much time trying to work through our anxiety that it can become almost like another consciousness living within our brain: an enemy that we need to get rid of in order to live full, productive lives. The reality of the situation, as usual, is more complicated than that. Though our anxiety is something that we have to manage, it's also part of who we are. It shapes choices we make, the way we looked at the world, and even facets of our personalities. To look as it as an enemy is to deny that part of ourselves any validity.

About a year ago, my therapist pointed out that I am an anxious person, that I am probably going to be an anxious person for the rest of my life, and that my personality involves certain quirks and tics that are the result of anxiety. It shocked me, even though I'd known for years that I had generalized anxiety disorder — I thought of my anxiety as a disease that needed curing instead of as an (admittedly frustrating) part of who I was. Since then, I've worked hard to stop thinking that way, and it's hugely helped me to dispel the lingering sense of failure and inadequacy that I'd known for years as anxiety's partner in crime. It's okay to be an anxious person, and that's something worth mentioning to the anxious people in your life — they really, honestly, might not know that.


* And, finally, the most important thing I wish everyone knew about anxiety, and about mental health issues in general: if you know someone with anxiety and you want to help them, ask them what would be helpful, ideally during a time when they are calm and non-panicked

The most unkind thing you can do to a person with anxiety is topile on, which can be a tricky thing, because it may be something you do without realizing it. The thing about anxiety is that it makes possibility-spinners of all of us — we are, as a group, the sort of people who look at what could happen instead of what is happening, whether we want to or not. And this results in hyper-aware, hypersensitive people more often than it doesn't; it's impossible to torture yourself with thoughts of how others might behave or react to things if you don't know how others generally behave or react to things. Your frustration with us and our spiraling thoughts, your exhaustion at how difficult we can be to deal with, your annoyance at our anxiety-rooted behaviors, your wish that we could just cut it out: we know you are feeling those things. We can tell. And, perhaps more to the point, we are feeling them also — we are also frustrated, exhausted, annoyed at ourselves. We also wish we could just stop. The difference between us and you is that we are thinking those things all the time, because we spend our lives with that anxious personality that can become so grating. There is also a great deal of guilt and self-loathing that comes along with those thoughts for us, both because most of us are struggling daily to feel better and because we really don't want to bother anyone.

It is okay, if you have an anxious person in your life, to find them frustrating or exhausting or annoying. Nobody is blaming you. In fact, believe me: we get it. But you have the ability to walk away when you find yourself responding to someone's anxiety that way, and that gift (and it is a gift) is not one we share. It is better to walk away from an anxious person than it is to feed their frustration with your own. It is better to walk away from an anxious person than it is to tell them they need to calm down — we know we need to calm down, and hearing you say it only adds guilt and failure to the pile of emotions that was already overwhelming us. Distracting us can be helpful, listening to us can be helpful, even sitting with us in silence can be helpful, but please, I beg of you, don't pile on. It makes it so much harder to get to a calmer place, and we really want to do that.

As for what you should do, much though I appreciate your making it to the end of this article, there is no advice that I, A Stranger On The Internet, can give you that will be better than the advice that they, The Person You Actually Know Whose Specific Experience You Are Concerned With, are going to be able to offer. They know themselves, and that makes them a lot more likely to know what they need than I am. You'd be surprised by how many people are afraid to even ask the question. Do not worry, friends. The anxious person in your life? They know they are anxious. Your bringing it up is unlikely to startle them.

In the event that you do ask them and they don't know what they need, then I will say this: everybody needs kindness, especially people who are predisposed to being unkind to themselves. You'd be amazed how much little things — a smile, a reassurance, a compliment, a sandwich — can lift somebody's spirits, and people with anxiety are often afraid or unable to ask for those things, even when (especially when) they need them. So that's my advice: kindness. It's a hard one to go wrong on.

What's the point of a curved TV?

 

The world's first 110-inch curved UHD TV unveiled by TCL in September – but is curved bett...

The world's first 110-inch curved UHD TV unveiled by TCL in September – but is curved better than straight?

Over the last year or so, we've seen a number of curved TVs hitting the market. Sure, they look slick and stand out from the crowd, but what, if anything makes a curved TV better than a flat one when it comes to your viewing pleasure?

One of the biggest marketing hooks upon which curved TV manufacturers like LG and Samsung are hanging their hats is the idea that curved TVs provide better a better viewing experience, and there is some scientific evidence to back up the claim.

Oshin Vartanian and colleagues at the University of Toronto's Department of Psychology have been working in the the field of neuroaesthetics. This is the study of what neurological factors play a role in the things we find pleasing to the eye, or not. Research by Vartanian and his team suggests that we naturally find curved objects more pleasing than those with straight edges.

Whilst he acknowledges that curved TVs "provide some flair," Dr. Raymond M. Soneira of display diagnostics and calibration company DisplayMate argues that whether or not we like a curved TV more or less than a flat one is still primarily a subjective matter. Soneira, who earned a Ph.D. in Theoretical Physics at Princeton, says there are other, more tangible benefits to a curved screen.

Soneira explains that the concave shape reduces the number of reflections on a screen by eliminating certain angles from which they can be created. "This is very important for a display technology that produces excellent dark image content and perfect blacks, because you don’t want that spoiled by ambient light reflected off the screen," says Soneira.

He also says that curved TVs improve the viewing experience for individuals sitting off-center. Soneira explains that the curve of the screen works to eliminate some of the unintended "foreshorteneing" caused by sitting to one side. That is to say, images displayed on the far side of the screen that would otherwise look unnaturally small compared to images on the near side of the screen due to the larger viewing distance are, in fact, equalized to some extent by the curve.

Soneira also points out that the curved shape keeps the screen at a more uniform distance from the viewer's eyes when they are sitting centrally. This reduces the slight visual geometric distortion caused by the fact that the sides of the TV are further away from the viewer than the center when looking at a flat screen.

This more uniform distance from the edges and the center of the screen to the viewer's eyes is something to which Samsung, amongst others, has argued there are other benefits. By bringing forward the sides of the screen, a curve effectively increases size of a TV as perceived by the viewer. This is because it subsequently fills more of the individual's field of view.

Samsung also argues that curved screens deliver a greater sense of immersiveness and that the more uniform focal distance minimizes viewing distortion at the sides of the screen. Based on an average living room viewing distance of around 3-4 m (10-13 ft), the firm says that 4200 mm (13.8 ft) is the optimal curve radius to ensure a uniform viewing distance across the screen.

So it would seem that along with their futuristic looks (which let's face it, is a perfectly valid reason to buy one for many consumers), there are some tangible benefits to curved TVs. Whether or not these justify the significant price hike over their flat counterparts is another matter entirely.

What's your take on curved TVs? We'd love to hear from readers who have taken the plunge.

About the Author

Stu is a tech writer based in Liverpool, UK. He has previously worked on global digital estate management at Amaze and headed up digital strategy for FACT (Foundation for Art and Creative Technology). He likes cups of tea, bacon sandwiches and RSS feeds.   All articles by Stu Robarts

Review: aerelight OLED lamp

 

Gizmag tries out the aerelight OLED lamp (Photo: Ben Coxworth/Gizmag)

Gizmag tries out the aerelight OLED lamp (Photo: Ben Coxworth/Gizmag)

Image Gallery (5 images)

While OLED technology is increasingly being applied to things like electronic gadget displays and TVs, it can also serve as an efficient and aesthetically-pleasing form of lighting. A number of companies have capitalized on this fact by marketing OLED lamps, although most of them are quite expensive – prices can range from around US$500 up into the thousands. Canada's OTI Lumionics, however, has developed its own cost-effective OLED lighting system, and incorporated it into the $239 aerelight. I recently got to try one out for myself.

First of all, just what is an OLED, or Organic Light Emitting Diode? Well, essentially it's a thin electroluminescent panel containing carbon-based organic dyes, that emits light when an electrical current is passed through it. As a light source, OLEDs have an electrical efficiency similar to that of LEDs, although they produce a softer, more even light – this is because the light is being emitted from a broad sheet of material, instead of from individual bulbs.

Additionally, they're said to produce a nicer color temperature of "white" light, plus their thin, flexible form allows for some interesting design possibilities.

... which brings us to the aerelight. As can be seen in the photos, it has a very modern, minimalist form – its light-emitting panel is less than 2 mm thick. There are no controls on the anodized aluminum-bodied lamp whatsoever, with users turning it on and then cycling through three brightness settings simply by touching it anywhere.

The lamp has a very modern, minimalist form (Photo: Ben Coxworth/Gizmag)

At its maximum setting, it puts out 1,000 lux at a warm, incandescent-like temperature of 2,900 K (using just 7 watts of energy as it does so). This certainly proved sufficient to light up my desk area. It would be nice if the angle of the panel could be adjusted, although this is by no means a deal-breaker – because there's no one bright spot of light, glare isn't really an issue. It's also worth noting that unlike the halogen desk lamp which I currently use, it produces no noise whatsoever.

According to OTI, the lighting panel should last for 20 years with a typical usage of three hours per day at maximum brightness.

A not-so-gently-used Nexus 5 juices up on the aerelight's Qi charging pad (Photo: Ben Coxw...

As an added feature, the designers have built a Qi wireless charging pad into the wood-accented base of the lamp. To charge a Qi-ready smartphone (which I had some difficulty tracking down for testing), you just place it on the pad and the charging begins. It's a handy feature I suppose, although given that most phones still don't incorporate the Qi system, perhaps buyers should have the option of going with a less expensive lamp that doesn't have a charging pad.

All in all, I definitely liked the aerelight – particularly its simplicity, quality of light, and solid feel. OTI is taking preorders now, with shipping planned to start early next year. Buyers can choose between frame colors of black, red and silver.

Product page: aerelight

 

Suplemento: Os benefícios do Picolinato de Cromo na prática de exercícios

 

(O texto a seguir é de natureza meramente informativa a respeito dessa substância. Todo e qualquer suplemento deve ser tomado depois de obter instruções e direcionamento de profissionais na área de Saúde)

Os sais minerais são de grande importância para a manutenção da saúde e para a melhora do desempenho atlético. Ao todo, cerca de 20 minerais são necessários - em doses adequadas - para manter o bom funcionamento de tecidos e células. Alguns desses elementos são absorvidos em doses
pequenas (microgramas) ao passo que outros necessitam de doses maiores (miligramas e gramas) para serem totalmente absorvidos.
Em 1959, o cromo (PM52g/mol) foi identificado como elemento que potencializa a ação do hormônio insulina.
Este mineral existe em diversas formas, das quais as mais comuns são Os benefícios do Picolinato de Cromo na prática de exercícios a hexavalente e a trivalente. A primeira é altamente tóxica e oxidante e, em caso de contato com a pele, pode ocasionar irritação local e até mesmo corrosão. Gerada como subproduto da produção de aço inoxidável e compostos químicos é a forma que não nos interessa. Já o cromo trivalente é mais estável e pode ser encontrado em plantas em pequenas quantidades.
Os grãos e cereais contêm maiores concentrações do que as frutas ou vegetais e o levedo de cerveja é considerado a melhor fonte de cromo entre os alimentos. Este mineral é essencial na manutenção dos níveis de açúcar no sangue e no transporte do mesmo até as células musculares para o
metabolismo.
O cromo demonstrou, em diversos estudos, ser eficaz na redução dos níveis de
colesterol total e no aumento do HDL (High-Density Lipoprotein), o bom colesterol. A nutrição do brasileiro carece de cromo (e vários outros minerais) devido ao fato de nossos solos de cultivo nunca terem sofrido correção. Além disso, o aumento do consumo de alimentos altamente refinados e processados é um dos fatores que contribui para que o Brasil ocupe uma vergonhosa posição no ranking mundial dos países com maior incidência de diabetes.

Um mal a ser evitado
O cromo é um suplemento largamente vendido nos EUA, ficando atrás apenas do cálcio, e a forma mais procurada é o Picolinato de Cromo. Sua utilização por atletas, de competição ou não, se dá pelo fato destes desejarem evitar a Resistência à Insulina, um fator negativo ao crescimento muscular do atleta, pois os
músculos se tornam menos sensitivos aos efeitos do hormônio insulina e também mais resistentes ao mesmo. A insulina é de grande importância para drenar aminoácidos, carboidratos e substâncias como creatina para dentro da célula muscular. Este hormônio liga-se a receptores localizados na superfície das células musculares . Por outro lado, um hormônio — inimigo dos atletas — o cortisol, altamente catabólico, atua nestes receptores tornando-os menos responsivos a ligação da insulina com estes. O resultado disso é uma tragédia para o atleta que busca otimização máxima de ganhos musculares com o mínimo de gordura corporal.

Podemos citar três “tragédias” para que você leitor possa tomar conhecimento de alguns males que a Resistência à Insulina pode causar-lhe:
1. Você toma sua dose de
creatina após sua sessão de treino. Ótimo, mas ela não chegará onde você deseja!
2. Você ingeriu uma boa dose de carboidratos como a dextrose e
maltodextrina a fim de auxiliar a drenagem de aminoácidos e nutrientes para dentro da célula e com efeito poupador de proteína. Ótimo, mas eles não serão corretamente utilizados!
3. A síntese de proteínas que você espera ocorrer e ser perfeitamente orquestrada no citoplasma de suas células... talvez nem chegue a ocorrer!

Que tragédia! Seu crescimento muscular é limitado e você ainda corre o risco de sofrer um evento catabólico após o treinamento, ao invés de anabolizar por completo! Mas o pior é que a produção excessiva de insulina pode levar você a um ganho excessivo de gordura e como tudo o que está ruim pode piorar, você ainda pode desenvolver Diabetes tipo II e para isto basta que você consuma excesso de carboidratos de má qualidade combinados com muita gordura (fisiculturistas em épocas fora de competição devem ter cuidado nesta fase).Isso acarretará fatidicamente na redução da afinidade dos receptores de insulina nas membranas celulares, porém, nos adipócitos, suas células de gordura, a “amizade” continua e seu pâncreas, numa tentativa heróica de tentar compensar a queda na eficiência desse hormônio e sua atuação nos tecidos alvo (exceto o adiposo!) passa a secretar maiores quantidades de insulina e este aumento favorece unilateralmente uma melhor assimilação da glicose sangüínea pelos adipócitos em detrimento dos demais tecidos. A glicemia eleva-se — uma conseqüência direta da deficiência de assimilação desse açúcar pelas células — e isso acaba resultando num aumento de oferta de glicose para as...
Adivinhe! Malditas células adiposas! Como você pode perceber envolve use em uma bola de neve criada pela Resistência à Insulina e está descendo ladeira abaixo sem controle em direção ao fracasso físico.

Como amenizar esse quadro?
O cromo é parte do Fator de Tolerância à Glicose (GTF), uma substância biologicamente ativa fabricada em nosso organismo que regula o
metabolismo do açúcar. Acredita-se que o GTF seja uma combinação de cromo + niacina e diversos aminoácidos, mas a estrutura do GTF ainda não está claramente caracterizada. O GTF, material produzido por seu corpo é uma forma muito mais ativa do que a forma GTF sintética encontrada em suplementos
de cromo. O uso deste suplemento causa uma melhor captação da glicose, melhor circulação sangüínea e manutenção dos níveis de açúcar no sangue.
Não há até o momento uma comprovação científica de que este suplemento aumente a massa muscular e reduza a gordura corporal, mas o fato é que atletas de fisiculturismo que fazem uso deste suplemento , conseguem impedir com grande maestria o surgimento do mal da Resistência à Insulina, evitando assim danos ao físico em fases de pré-competição.

Dosagens Recomendadas
A grande maioria das literaturas sugere doses de 50-300mcg em uma dieta de 2000 calorias. Seguindo este protocolo, o uso de cromo não é tóxico ao organismo humano.
Atletas de competição (fisiculturismo profissional) chegam a utilizar até
200mcg a cada refeição diariamente.
Os atletas que treino atualmente utilizam várias doses ao longo do dia e mesmo em fase fora de competição conseguem manter seus físicos com
ótima definição e marcação muscular.

Sugestão de Uso:
Para atletas de competição
Antes do café da manhã: 200mcg
Antes do Treino: 200mcg — isso auxiliará o seu pico de insulina pós treino e garantirá uma melhor drenagem de substâncias anabólicas para dentro
de suas células musculares.
Antes do lanche meio da tarde ou manhã: 200mcg.
Juntamente com o jantar: 200mcg.
Fonte: REVISTA SUPLEMENTAÇÃO - ANO 01 - EDIÇÃO 03

ALEXANDRE ROBERTO DE MELO
Presi
dente da Federação Gaúcha de Fisiculturismo e Musculação Atlética