quarta-feira, 10 de setembro de 2014

Artificial membranes on silicon

 

September 9, 2014

American Institute of Physics

Artificial membranes mimicking those found in living organisms have many potential applications ranging from detecting bacterial contaminants in food to toxic pollution in the environment to dangerous diseases in people. Now a group of scientists has developed a way to create these delicate, ultra-thin constructs through a 'dry' process, by evaporating two commercial, off-the-shelf chemicals onto silicon surfaces.


Organic and inorganic materials grouped together to bridge the gap between biology and physics.

Artificial membranes mimicking those found in living organisms have many potential applications ranging from detecting bacterial contaminants in food to toxic pollution in the environment to dangerous diseases in people. Now a group of scientists in Chile has developed a way to create these delicate, ultra-thin constructs through a "dry" process, by evaporating two commercial, off-the-shelf chemicals onto silicon surfaces.

Described in The Journal of Chemical Physics, from AIP Publishing, this is the first time anyone has ever made an artificial membrane without mixing liquid solvents together. And because the new process creates membranes on silicon surfaces, it is a significant step toward creating bio-silicon interfaces, where biological "sensor" molecules can be printed onto cheap silicon chip holding integrated electronic circuits.

"Our idea is to create a biosensor that can transmit electrical signals through the membrane," said María José Retamal, a Ph.D. student at Pontificia Universidad Católica de Chile and first author of the paper.

Membranes for Technology, as for Life

The importance of lipid membranes to life is hard to overstate. They are a principal component of the cell, as fundamental as DNA or proteins, and all known organisms on Earth, from the bittiest bacteria to the biggest blue whales, use membranes in a multitude of ways.

They separate distinct spaces within cells and define walls between neighboring cells -- a functional compartmentalization that serves many physiological processes, protecting genetic material, regulating what comes in and out of cells, and maintaining the function of separate organs.

Synthetic membranes that mimic nature are of great interest to science because they offer the possibility of containing membrane proteins -- biological molecules that could be used for detecting toxins, diseases and many other biosensing applications.

Retamal and her colleagues created the first artificial membrane without using solvents on a silicon support base. They chose silicon because of its low cost, wide availability and because its "hydrophobicity" (how much it repels water) can be controlled chemically, allowing them to build membranes on top.

Next they evaporated a chemical known as chitosan onto the silicon. Chitosan is derived from chitin, a sugar found in the shells of certain crustaceans, like lobsters or shrimp. Whole bags of the powder can be bought from chemical companies worldwide. They chose this ingredient for its ability to form a moisturizing matrix. It is insoluble in water, but chitosan is porous, so it is capable of retaining water.

Finally they evaporated a phospholipid molecule known as dipalmitoylphosphatidylcholine (DPPC) onto the chitosan-covered silicon substrate and showed that it formed a stable "bilayer," the classic form of a membrane. Spectroscopy showed that these artificial membranes were stable over a wide range of temperatures.

More work is needed to standardize the process by which proteins are to be inserted in the membranes, to define the mechanism by which an electrical signal would be transmitted when a protein binds its target and to calibrate how that signal is detected by the underlying circuitry, Retamal said.

"This is a powerful tool," she added. "The idea is that it will be used by the rest of the scientific community in order to improve existing techniques."


Story Source:

The above story is based on materials provided by American Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. María J. Retamal, Marcelo A. Cisternas, Sebastian E. Gutierrez-Maldonado, Tomas Perez-Acle, Birger Seifert, Mark Busch, Patrick Huber and Ulrich G. Volkmann. Towards bio-silicon interfaces: Formation of an ultra-thin self-hydrated artificial membrane composed of dipalmitoylphosphatidylcholine (DPPC) and chitosan deposited in high vacuum from the gas-phase. The Journal of Chemical Physics, 2014 DOI: 10.1063/1.4894224

Carbon dioxide concentration surges: Record greenhouse gas levels impact atmosphere and oceans, WMO report finds

 


Earth (stock image).

The amount of greenhouse gases in the atmosphere reached a new record high in 2013, propelled by a surge in levels of carbon dioxide. This is according to the World Meteorological Organization's annual Greenhouse Gas Bulletin, which injected even greater urgency into the need for concerted international action against accelerating and potentially devastating climate change.

The Greenhouse Gas Bulletin showed that between 1990 and 2013 there was a 34% increase in radiative forcing -- the warming effect on our climate -- because of long-lived greenhouse gases such as carbon dioxide (CO2), methane and nitrous oxide.

In 2013, concentration of CO2 in the atmosphere was 142% of the pre-industrial era (1750), and of methane and nitrous oxide 253% and 121% respectively.

The observations from WMO's Global Atmosphere Watch (GAW) network showed that CO2 levels increased more between 2012 and 2013 than during any other year since 1984. Preliminary data indicated that this was possibly related to reduced CO2 uptake by Earth's biosphere in addition to the steadily increasing CO2 emissions.

The WMO Greenhouse Gas Bulletin reports on atmospheric concentrations -- and not emissions -- of greenhouse gases. Emissions represent what goes into the atmosphere. Concentrations represent what remains in the atmosphere after the complex system of interactions between the atmosphere, biosphere and the oceans. About a quarter of the total emissions are taken up by the oceans and another quarter by the biosphere, reducing in this way the amount of CO2 in the atmosphere.

The ocean cushions the increase in CO2 that would otherwise occur in the atmosphere, but with far-reaching impacts. The current rate of ocean acidification appears unprecedented at least over the last 300 million years, according to an analysis in the report.

"We know without any doubt that our climate is changing and our weather is becoming more extreme due to human activities such as the burning of fossil fuels," said WMO Secretary-General Michel Jarraud.

"The Greenhouse Gas Bulletin shows that, far from falling, the concentration of carbon dioxide in the atmosphere actually increased last year at the fastest rate for nearly 30 years. We must reverse this trend by cutting emissions of CO2 and other greenhouse gases across the board," he said. "We are running out of time."

"Carbon dioxide remains in the atmosphere for many hundreds of years and in the ocean for even longer. Past, present and future CO2 emissions will have a cumulative impact on both global warming and ocean acidification. The laws of physics are non-negotiable," said Mr Jarraud.

"The Greenhouse Gas Bulletin provides a scientific base for decision-making. We have the knowledge and we have the tools for action to try keep temperature increases within 2°C to give our planet a chance and to give our children and grandchildren a future. Pleading ignorance can no longer be an excuse for not acting," said Mr Jarraud.

"The inclusion of a section on ocean acidification in this issue of WMO's Greenhouse Gas Bulletin is appropriate and needed. It is high time the ocean, as the primary driver of the planet's climate and attenuator of climate change, becomesa central part of climate change discussions," said Wendy Watson-Wright, Executive Secretary of the Intergovernmental Oceanographic Commission of UNESCO.

"If global warming is not a strong enough reason to cut CO2 emissions, ocean acidification should be, since its effects are already being felt and will increase for many decades to come. I echo WMO Secretary General Jarraud's concern -- we ARE running out of time," she said.

Atmospheric Concentrations

Carbon dioxide accounted for 80% of the 34% increase in radiative forcing by long-lived greenhouse gases from 1990 to 2013, according to the U.S. National Oceanic and Atmospheric Administration (NOAA) Annual Greenhouse Gas Index.

On the global scale, the amount of CO2 in the atmosphere reached 396.0 parts per million in 2013. The atmospheric increase of CO2 from 2012 to 2013 was 2.9 parts per million, which is the largest annual increase for the period 1984-2013. Concentrations of CO2 are subject to seasonal and regional fluctuations. At the current rate of increase, the global annual average CO2 concentration is set to cross the symbolic 400 parts per million threshold in 2015 or 2016.

Methane is the second most important long-lived greenhouse gas. Approximately 40% of methane is emitted into the atmosphere by natural sources (e.g., wetlands and termites), and about 60 % comes from human activities like cattle breeding, rice agriculture, fossil fuel exploitation, landfills and biomass burning. Atmospheric methane reached a new high of about 1824 parts per billion (ppb) in 2013, due to increased emissions from anthropogenic sources. Since 2007, atmospheric methane has been increasing again after a temporary period of leveling-off.

Nitrous oxide (N2O)

Nitrous oxide is emitted into the atmosphere from both natural (about 60%) and anthropogenic sources (approximately 40%), including oceans, soil, biomass burning, fertilizer use, and various industrial processes. Its atmospheric concentration in 2013 was about 325.9 parts per billion. Its impact on climate, over a 100-year period, is 298 times greater than equal emissions of carbon dioxide. It also plays an important role in the destruction of the stratospheric ozone layer which protects us from the harmful ultraviolet rays of the sun.

Ocean Acidification

For the first time, this Bulletin contains a section on ocean acidification prepared in collaboration with the International Ocean Carbon Coordination Project (IOCCP) of the Intergovernmental Oceanographic Commission of UNESCO (IOC-UNESCO), the Scientific Committee on Oceanic Research (SCOR), and the Ocean Acidification International Coordination Centre (OA-ICC) of the International Atomic Energy Agency (IAEA).

The ocean currently absorbs one-fourth of anthropogenic CO2 emissions, reducing the increase in atmospheric CO2 that would otherwise occur because of fossil fuel combustion. Enhanced ocean CO2 uptake alters the marine carbonate system and lead to increasing acidity. The ocean's acidity increase is already measurable as oceans take up about 4 kilogrammes of CO2 per day per person.

The current rate of ocean acidification appears unprecedented at least over the last 300 million years, based on proxy-data from paleo archives. In the future, acidification will continue to accelerate at least until mid-century, based on projections from Earth system models.

The potential consequences of ocean acidification on marine organisms are complex. A major concern is the response of calcifying organisms, such as corals, algae, mollusks and some plankton, because their ability to build shell or skeletal material (via calcification) depends on the abundance of carbonate ion. For many organisms, calcification declines with increased acidification. Other impacts of acidification include reduced survival, development, and growth rates as well as changes in physiological functions and reduced biodiversity.

The WMO Global Atmosphere Watch Programme (www.wmo.int/gaw) coordinates systematic observations and analysis of greenhouse gases and other trace species. Fifty countries contributed data for the Greenhouse Gas Bulletin. Measurement data are reported by participating countries and archived and distributed by the World Data Centre for Greenhouse Gases (WDCGG) at the Japan Meteorological Agency. (http://ds.data.jma.go.jp/gmd/wdcgg)

The summary on ocean acidification was jointly produced by the International Ocean Carbon Coordination Project (IOCCP) of the Intergovernmental Oceanographic Commission of UNESCO (IOC-UNESCO), the Scientific Committee on Oceanic Research (SCOR), and the Ocean Acidification International Coordination Centre (OA-ICC) of the International Atomic Energy Agency (IAEA).

Water Droplets Flow Uphill through a Superheated Maze Thanks to the Leidenfrost Effect

 

 

The Leidenfrost effect

 

Snap 2014-09-10 at 18.34.26

Quais são as propriedades da Ginkgo Biloba

 


Sara Viega

 

Quais são as propriedades da Ginkgo Biloba

A Ginkgo Biloba é uma das plantas medicinais mais conhecidas, originária da China, esta árvore de longa vida converteu-se num pilar importante dentro da medicina tradicional deste país, e nos vários ramos da saúde que usam a natureza em seu favor. Mas, para que serve e como beneficia a nossa saúde? Em umComo.com.br explicamos-lhe quais são as propriedades da Ginkgo Biloba e os seus efeitos sobre o nosso corpo.

 


  1. Um dos principais benefícios da ginkgo biloba é melhorar a circulação sanguínea, devido ao seu conteúdo de flavonoides. Isto ajuda a manter o nosso cérebro em bom estado, favorecendo a concentração e diminuindo o cansaço. Assim sendo, é muito recomendada em pessoas da terceira idade e as que sofrem de doenças degenerativas como o Alzheimer.

  2. A ginkgo biloba é uma planta muito recomendada para aumentar a energia e melhorar a memória, além disso é uma grande aliada para combater a depressão.

  3. A sua grande quantidade de antioxidantes que favorecem a circulação sanguínea, também ajudam a prevenir a formação de coágulos. A ginkgo biloba é uma grande aliada para pessoas que se encontram em convalescença depois de uma trombose, problemas cardíacos ou acidentes vasculares cerebrais.

  4. Graças aos seus efeitos sobre a circulação, o aspeto íntimo também é favorecido, ou seja a ginkgo biloba é uma das plantas medicinais recomendadas para aumentar o desejo sexual, melhorando as ereções e a sensibilidade clitoriana.

  5. Além disso, os antioxidantes que nos fornece ajudam a combater a formação de radicais livres, responsáveis pelo envelhecimento prematuro da pele e por doenças como o câncer. Graças às suas propriedades anti-inflamatórias e circulatórias, é muito recomendada para pacientes que sofrem de diabetes, doenças reumáticas como a artrite e dores musculares.

  6. Apesar de contar com muito benefícios para a saúde, é sempre recomendável consultar o seu médico antes de começar a tomar ginkgo biloba. Além disso, deve lembrar-se que esta planta medicinal é contraindicada durante a gravidez e lactância.

  7. Se deseja ler mais artigos parecidos a quais são as propriedades da Ginkgo Biloba , recomendamos que entre na nossa categoria de Ervas medicinais.

Snap 2014-09-10 at 16.13.19

Smoking: Do you really know the risks?

 

 

 

You probably know about  the relationship between smoking and lung cancer, but did you know smoking is also linked to heart disease, stroke and other chronic lung diseases?  Smoking can also increase your risk for cancer of the bladder, throat and mouth, kidneys, cervix and pancreas.  Thinking about quitting? Look at the facts!
Why you should quit?

  • Smoking is the most preventable cause of death in the WORLD. 
  • Smoking causes more than one in five deaths in the WORLD 
  • 90 percent of lung cancer in men is directly related to smoking and 80 percent of lung cancer in women is caused by cigarettes.  
  • About 23 percent of adult men and about 18 percent of adult women smoke.
  • The highest percentage of people who smoke are between the ages of 25 and 44.
  • According to the American Heart Association, most adult smokers started smoking when they were preteens or teenagers. Unfortunately, many young people don’t fully understand the dangers of smoking.
  • About 60 percent of American children ages 4-11 are exposed to secondhand smoke at home.
  • On average, smokers die 13 to 14 years earlier than nonsmokers. 
  • Since 1965, more than 45 percent of adults who have ever smoked have quit.
  • You can be one of the millions of people who successfully quit every year.

Dangers of Smoking Graphic

What makes cigarettes so toxic and dangerous?
There are 4,000 chemical components found in cigarettes and at least 250 of them are harmful to human health, according to the Centers for Disease Control and Prevention.

Here are a few examples:

  • 1,3-Butadine is a chemical used to manufacture rubber.  According to the CDC, “it may increase risk of cancer in the stomach, blood and lymphatic system.”
  • Acrolein is a gas linked to lung cancer. It inhibits DNA repair and can destroy the lining in the lungs that protects you from lung disease.
  • Arsenic is used to preserve wood.  In humans, it can cause heart disease and cancer.
  • Benzene is used to manufacture other chemicals. It can cause cancer, particularly leukemia, in humans.
  • Cadmium is a metal used to make batteries.  Cadmium can interfere with the repair of damaged DNA, as well as damage the kidneys and the lining of the arteries.
  • Chromium VI is used to make alloy metals, paint and dyes.  It has been proven to be linked to lung cancer.
  • Formaldehyde is a chemical used to kill bacteria and preserve human and animal remains.  It’s a known cause of cancer, one of the main substances linked to chronic lung disease and a very toxic ingredient in secondhand smoke.
  • Polonium-210 is a radioactive element inhaled directly into the airway.  Some studies show that people who smoke a pack-and-a-half of cigarettes a day are receiving the same radiation they’d get from 300-plus X-rays per year!
  • Tar is solid, inhaled chemicals linked with an increased risk for cancer.  It also leaves a sticky, brown residue on your lungs, teeth and fingernails.

Carbon monoxide & nicotine: A dangerous duo

Carbon monoxide is a harmful gas you inhale when you smoke.  Once in your lungs, it’s transferred to your bloodstream.  Carbon monoxide decreases the amount of oxygen that is carried in the red blood cells.  It also increases the amount of cholesterol that is deposited into the inner lining of the arteries which, over time, can cause the arteries to harden.  This leads to heart disease, artery disease and possibly heart attack.
Nicotine is a dangerous and highly addictive chemical. It can cause an increase in blood pressure, heart rate, flow of blood to the heart and a narrowing of the arteries (vessels that carry blood). Nicotine may also contribute to the hardening of the arterial walls, which in turn, may lead to a
heart attack. This chemical can stay in your body for six to eight hours depending on how often you smoke.  Also, as with most addictive substances, there are some side effects of withdrawal.
Second-Hand Smoke

Smokers aren’t the only ones affected by tobacco smoke. Secondhand smoke is a serious health hazard for nonsmokers, especially children. Nonsmokers who have high blood pressure or high blood cholesterol have an even greater risk of developing heart diseases when they’re exposed to secondhand smoke.
Environmental tobacco smoke causes about 46,000 heart disease deaths and 3,400 lung cancer deaths. Studies show that the risk of developing heart disease is about 25-30 percent higher among people exposed to environmental tobacco smoke at home or work. Secondhand smoke promotes illness, too. Children of smokers have many more respiratory infections than do children of nonsmokers. Nonsmoking women exposed to tobacco smoke are also more likely to have low-birthweight babies. Excerpted and adapted from "When Risk Factors Unite," appearing in the Stroke Connection Magazine January/February 2005 (Science update May 2008)

These are just a few of the dangerous chemicals found in cigarettes; there are many more.  But you do not have to spend the rest of your life giving in to your addiction! Thousands of people kick the habit every year, and you can be one of them.  It may not be easy, but you can do it!

Become more productive

 

Productivity is about the effective and efficient use of all resources. Resources include time, people, knowledge, information, finance, equipment, space, energy, materials.

Want to know more ways to become more productive? Check out the infographics below.

via entrepeneur

 

Snap 2014-09-10 at 14.15.11

Top 20 Interview Questions

 

Top 20 Job Interview Questions and Best Answers

Businesswomen meeting in conference room - Monashee Frantz/OJO Images/Getty Images

Monashee Frantz/OJO Images/Getty Images

Many of the questions that employers ask at job interviews will be standard interview questions. It's important to be prepared to respond to those interview questions.

You don't need to memorize an answer, but do review the question so you know what you'll be asked and so you have an idea of how you will respond during the interview.

Review the top 20 interview questions you'll most likely be asked at a job interview, plus the best answers. Also, review the other questions you may be asked, so you're prepared to ace the interview.

Top 20 Interview Questions

  1. What were your responsibilities? - Best Answers
  2. What did you like or dislike about your previous job? - Best Answers
  3. What were your starting and final levels of compensation? - Best Answers
  4. What major challenges and problems did you face? How did you handle them? - Best Answers
  5. What is your greatest strength? - Best Answers
  6. What is your greatest weakness? - Best Answers
  7. How do you handle stress and pressure? - Best Answers
  8. Describe a difficult work situation / project and how you overcame it. - Best Answers
  9. What was the biggest accomplishment / failure in this position? - Best Answers
  10. How do you evaluate success? - Best Answers
  11. Why are you leaving or have left your job? - Best Answers
  12. Why do you want this job? - Best Answers
  13. Why should we hire you? - Best Answers
  14. What are your goals for the future? - Best Answers
  15. What are your salary requirements? - Best Answers
  16. Tell me about yourself. - Best Answers
  17. Who was your best boss and who was the worst? - Best Answers
  18. What are you passionate about? - Best Answers
  19. Questions about your supervisors and co-workers. - Best Answers
  20. Questions about your career goals. - Best Answers

More Interview Questions

Job Interview Questions and Answers
Common job interview questions, plus sample answers you can use to practice for a job interview.

Difficult Interview Questions
These are some of the more difficult interviews you may be expected to respond to during a job interview.

Interview Questions Employers Should Not Ask
There are some interview questions, typically known as illegal interview questions, that employers should not ask during a job interview. Here are questions that shouldn't be asked during a job interview and how to best respond.

How to Hack Your Brain

 

How to Hack Your Brain

You are not who you think you are. Your personality and identity is significantly more malleable than you realize. With a few simple tricks, you can exploit your brain's innate functionality to change just about anything about yourself. Here's how.

You Are Not Necessarily the Person You Think You Are

How to Hack Your Brain

You are not who you are, but rather the product of many influences. The saying "you can't teach an old dog new tricks" exists for a reason: the longer you've been the person you think you are, the harder it becomes to change. The thing is, you can dramatically change who you are. It's actually not so much that it's difficult to change, but that you've developed patterns and habits that make it easier to do things the way you do them. Trying something in a new way can feel very awkward, it will be generally less efficient by virtue of being something new to you, and it often lacks excitement for you when it involves giving up the comfort associated with your way.

That's not to say you aren't born with some inherent abilities, but most of what you consider part of your identity is a product of influence. While we don't know the exact ratio of nature to nurture, there is undoubtedly a combination of both that makes us who we are. We have a tendency to think that change is difficult, but it's really just a matter of changing your influence. You're probably familiar with Stockholm syndrome-the term used to describe how hostage victims tend to develop positive feelings towards their captors. Stockholm syndrome isn't a kind of brainwashing by the captor; instead, the victim adapts to the poor situation he or she is in. If most people can adapt to something as awful as being kidnapped, most people can adapt to smaller positive changes in their own lives. You can even make enormous changes if you're willing to put in the work and you provide yourself with the proper influences. We're going to look at how to do that on high and low levels, from priming your brain to manipulating your own emotions, and also look at how your environment and the people you know shape your life.

Most of these methods won't make you feel comfortable, and, at times, they may sound a bit crazy, but it is possible to "hack" your own brain. Here are just a few ways to do it.

Priming Your Brain

How to Hack Your Brain

Priming is a ridiculously simple technique because all it involves is talking to yourself. On the dull end of the spectrum, it's similar to self-affirmation. On the crazier end of the spectrum, it bears some similarities with neuro-linguistic programming. Priming your brain involves reciting a given set of words that are designed to alter your mindset. It is not brainwashing and it cannot make you do anything you don't want to do. What it can accomplish, however, is putting you into a state of mind that will be more useful to you with a given situation or task.

How to Hack Your Brain

Before we get into the specifics of how to prime your brain, let's talk about how and why it works. If you were to say the word mustard out loud, and then you were to see a portion of the word later, you'd be reminded of mustard. For example, if you were to say "I must have this" you might be reminded of mustard because of the word must. If you were hungry and liked mustard, you may even want some. It's the same phenomenon that compels you to buy a particular brand of shampoo that you saw on television even if you 1) don't remember seeing the commercial, and 2) couldn't care less what kind of shampoo you use. This is essentially how priming works, and it's all thanks to your memory.

While you're not going to remember everything you say, that doesn't mean what you say is gone forever. While everything stored in your recent memory may not be immediately accessible, all you really need to bring something up is a trigger word. This is conceptually similar to using acronyms as a memory tool (e.g. Roy G. Biv) but isn't designed to help you actually remember anything. Instead, the goal is to place common words that, when apart, have no real specific value, but when together, have an associative value that make you think of happy things, sad things, specific people, or ambition. If any of those common words come up again later in the day, you'll immediately associate that word with the associative value of the group. Here's an example:

  • drive
  • objective
  • important
  • create
  • commitment
  • purpose
  • enthusiasm
  • eager
  • motivation

This is a list of words synonymous with or related to ambition. It's designed to be read aloud to put you in a more ambitious mindset, focusing your thoughts and priming your brain to react ambitiously when these words, or portions of these words, come up later in your day.

Another exercise involves taking a shorter list of priming words and making a sentence with it. Here's an example:

  • smiled
  • looked

These words can form the sentence "the girl looked and smiled," which should bring to mind pleasant associations for most people. Constructing sentences out of word lists (which you can create yourself) can help put you in the right mindset.

These two methods can be used to prime your brain. They are not magic tricks that will instantly make you feel happy, ambitious, or whatever, but they can help to provide you with the mindset you need to better accomplish your daily tasks.

For more reading on priming, and a look at some really interesting studies, don't forget to check out the references for this article.

Using Your Emotions

How to Hack Your Brain

If you've ever found yourself making out-of-character decisions based on your emotional state—such as binging on ice cream after a breakup—you know how easily your feelings can overtake your actions. Rather than letting your emotions lead you towards poor judgment and irrational behavior, however, you can learn to compensate for different emotional states and to fabricate emotions to alter your mood. In order to do that you need to, simply put, get in touch with your feelings. The idea isn't so much to cry into a pillow about your wasted childhood, but understand what you're feeling when you're feeling it, what the root cause is, and what you can do about it. We're going to take a look at how you can dissect your emotional state to use it to your advantage, and also look at how you can fabricate emotion to change how you're feeling.

Take an Acting Class

How to Hack Your Brain

You can't really control your emotions if you don't understand them, and one of the best ways to understand them is to take an acting class. To some this may sound fun, and to others this may sound like hell. Love it or hate it, acting lessons are one of the best ways to explore how and why you feel certain things. Your goal should be to find a class that will make you uncomfortable every time you go. In my experience, any class teaching the Meisner technique is very effective if you put a lot of effort into the exercises. It can be slow, tedious, and uncomfortable, but it's capable of bringing out emotion you might not realize you had.

Make Yourself Uncomfortable

How to Hack Your Brain

Your emotions aren't in full force if you're not really doing anything, so you need to put yourself in uncomfortable situations in order to bring them out. This doesn't mean you should make yourself feel horrible, but that you should go out and do things that you might resist because you're worried about the downsides. Meeting new people is something that makes most people uncomfortable, and it's a great place to start, especially if it's a first date. Try new things that scare you. If you notice you're glued to the couch and don't want to get up, do the opposite. Spend time with people you don't like. Go to a movie you're sure you'll hate. Your experiences won't always be pleasant, but they should incite emotion that you can later analyze and better understand.

Keep Track of How You Feel

How to Hack Your Brain

Like an abbreviated diary, every time you have an emotional reaction to something, write it down. You don't need much detail, but just a sentence or two noting the emotion you're experiencing and the (possible) cause. For example, I get extremely irritable when I'm hungry. I will lose my temper far more easily when I'm hungry, so whenever I notice myself thinking irrational (and sometimes hateful) things, I always remind myself that I'm just hungry, I'll eat in a minute, and the "asshole" who accidentally missed the garbage can and didn't notice is mostly a result of my frustrated stomach. Until I started to pay attention, I never really noticed that I was a jerk whenever I was hungry. Instead, I just thought I was a jerk. This is a simple example, but the point is this: pay attention to how you feel and the other issues currently present, and you'll find it much easier to manage your negative emotions.

Emote in Front of the Mirror

How to Hack Your Brain

Fabricating emotion is difficult. Once you understand your emotions you'll find it a bit easier, but it helps to be able to recall how it feels, physically, to emote. We all know how to smile, for example, but you can probably count more fake smiles in family photographs than you can real ones. If you don't know how to create an authentic smile (also known as the Duchenne smile), it will be very obvious to everyone around you.

The easiest way to learn to fake expressions is to practice them in the mirror. You can try them out to see what you look like and you'll immediately know if they're passable or not. You'll also note that it feels physically different to create an authentic-looking emotion than it does to create a fake-looking emotion. For example, an authentic smile shows more in the eyes than it does in your mouth. When someone smiles a true smile, their eyes wrinkle (creating "crows feet") because a new musicle—the orbicularis oculi muscle—is used. You'll come to remember this feeling and be able to replicate it away from the mirror after a little practice.

It's not necessarily easy to emote in front of the mirror, but that's not as hard as you think. If your goal is simply to learn to smile better, you'll get there if you just stare at yourself for awhile. Eventually it will get so ridiculous that you'll have to laugh. If you're less patient, you can try to make yourself laugh by making strange faces or just being ridiculous. If you're comfortable, have a friend over to help. For other emotions, you simply need to find a source of that emotion and bring it into play in front of the mirror. If you've employed any of the previously discussed techniques, you may already have a reserve. Alternatively, watch a movie that makes you laugh or cry and do it by the mirror. (Yes, this is absolutely a strange thing to do, but it'll work.) If you're interested in anger, you should have no problem getting there by just complaining to yourself or to a friend on the phone.

Emoting in front of the mirror is going to be strange and awkward at first, but after a few tries you'll get the hang of it and be able to create authentic expressions on demand. These expressions do surface from genuine emotion, so repeating them can actually make you feel happier/sadder/angrier/etc. through repetition. If you need to change your mood and your mindset, the ability to fake it ‘til you make it is very, very useful.

Consider Your Health

How to Hack Your Brain

Anything you do is much easier if you're healthy—and that goes for mental as well as physical health. These methods won't be terribly helpful if you're seriously depressed. If you're not sleeping, eating well, and/or getting a reasonable amount of physical activity in each day, you're going to find them difficult as well. You can do pretty much everything better if you take care of your mind and your body, so don't look at anything you've read here as a panacea for the problems in your life. Everything here assumes that you take reasonably good care of yourself and generally start your day in a good place. If you're not feeling good on most days, you need to take care of those problems before you decide to start playing mind tricks with yourself. Always be healthy first.


You can contact Adam Dachis, the author of this post, at adachis@lifehacker.com. You can also follow him on Twitter and Facebook.

The porcupine dilemma

 

The hedgehog's dilemma, or sometimes the porcupine dilemma, is an analogy about the challenges of human intimacy. It describes a situation in which a group of hedgehogs all seek to become close to one another in order to share heat during cold weather. They must remain apart, however, as they cannot avoid hurting one another with their sharp spines. Though they all share the intention of a close reciprocal relationship, this may not occur, for reasons they cannot avoid.

Both Arthur Schopenhauer and Sigmund Freud have used this situation to describe what they feel is the state of individual in relation to others in society. The hedgehog's dilemma suggests that despite goodwill, human intimacy cannot occur without substantial mutual harm, and what results is cautious behavior and weak relationships. With the hedgehog's dilemma, one is recommended to use moderation in affairs with others both because of self-interest, as well as out of consideration for others. The hedgehog's dilemma is used to justify or explain introversion and isolationism.

 

Schopenhauer

The concept originates in the following parable from the German philosopher Arthur Schopenhauer's Parerga und Paralipomena, Volume II, Chapter XXXI, Section 396:

A number of porcupines huddled together for warmth on a cold day in winter; but, as they began to prick one another with their quills, they were obliged to disperse. However the cold drove them together again, when just the same thing happened. At last, after many turns of huddling and dispersing, they discovered that they would be best off by remaining at a little distance from one another. In the same way the need of society drives the human porcupines together, only to be mutually repelled by the many prickly and disagreeable qualities of their nature. The moderate distance which they at last discover to be the only tolerable condition of intercourse, is the code of politeness and fine manners; and those who transgress it are roughly told—in the English phrase—to keep their distance. By this arrangement the mutual need of warmth is only very moderately satisfied; but then people do not get pricked. A man who has some heat in himself prefers to remain outside, where he will neither prick other people nor get pricked himself.