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lunes, 31 de agosto de 2009

Agujeros negros

They are some of the most massive explosions of energy in our universe, gamma ray bursts are powerful jets of energy that scientists are still trying to adequately explain. Their energy is in the form of high energy x-rays and gamma rays (thus the name). In recent years, many astrophysicists have come to believe that they were the powerful energy rays unleashed when a massive star collapses into a black hole, although the mechanism is still not fully understood. Still other possibilities, though.


An artistic illustration of a gamma ray burst.
Source: NASA/Swift/Mary Pat Hrybyk-Keith and John Jones

One alternative explanation, presented originally back in the 1990's, has resurfaced in a new paper by Maxim Barkov at the University of Leeds, UK, and Serguei Komissarov of the Space Research Institute in Moscow. This explanation involves a black hole falling into the star and devouring it from the inside out. In the words of the papers' authors, from the abstract:

In this paper, we re-examine the close binary scenario allowing for the possibility of late development of accretion disks in the collapsar model and investigate the available range of mass accretion rates, black hole masses, and spins. A particularly interesting version of the binary progenitor involves merger of a WR star with an ultra-compact companion, neutron star or black hole. In this case we expect the formation of very long-lived accretion disks, that may explain the phase of shallow decay and X-ray flares observed by Swift. Similarly long-lived magnetic central engines are expected in the current single star models of LGRB progenitors due to their assumed exceptionally fast rotation.

The paper explains how this model can explain the X-ray flares observed shortly after gamma ray bursts begin, which are not explained by many of the other models. It remains to be seen if this model can also explain the other features of gamma ray burst behavior.

Mas de la vitamina D

There's a paradigm shift going on in medicine as new research reveals a far greater role for vitamin D. Vitamin D is not just for kids -- or the prevention of rickets. Optimal levels of Vitamin D (40-80 ng/ml) enhance the creation and functioning of healthy cells throughout the body. In addition to protecting the bones and boosting the immune system, studies show that Vitamin D helps prevent certain cancers, including breast, ovarian, prostate, and colorectal.Exciting new research shows that in the U.S. alone, thousands of new cases of breast cancer could be prevented every year if more women had optimal levels of vitamin D.

A study conducted by Cedric Garland and other prominent vitamin D researchers determined that women with vitamin D levels above 52 ng/ml have half the risk of developing breast cancer as those with 13 ng/ml! Garland (et al) estimates that 58,000 new cases of breast cancer in the U.S. could be prevented per year by raising vitamin D levels to 52 ng/ml. Imagine what the global impact could be!

A simple blood test is all that's needed to find out your vitamin D level. Five years ago, a range of 20-100 ng/ml was considered normal. Just recently, this range was raised to 32-100 ng/ml. Make sure to ask your healthcare provider what your actual vitamin D level is. Too often women are told that their levels are normal, which is not the same as optimal.

If you're deficient, the best way to boost your vitamin D quickly is to supplement with vitamin D-3. Initially, you may need to take 5,000 IUs per day. After establishing a healthy level, I recommend supplementing with1,000-2,000 IUs per day--it's hard to get all you need from food. Some healthy fish provides 300-700 IUs, but milk only provides 100 IUs per glass.

You may be surprised to learn that the sun is actually the best source of vitamin D. The sun's UVB rays enable our bodies to manufacture vitamin D in the fat layer under the skin, as long as we don't use sunscreen. The body can make enough vitamin D from sun exposure to last the entire year! And it will never create toxic levels, regardless of how long you expose your skin. Although we are taught to fear the sun, sunbathing in moderation -- exposing but never burning the skin -- is good for us. This may explain why the incidence of breast cancer is higher in northern latitudes than at the equator.

I encourage every woman to check her vitamin D level regularly and keep it in the optimal range. This is easily done by supplementing with about 2,000 IUs of vitamin D-3 per day and getting regular, safe sun exposure. (You can even visit a tanning salon that offers UVB tanning rays.) Your breasts and your entire body will benefit. This is preventive medicine at its finest.


References:

1. Staud, R., 2005. Vitamin D: more than just affecting calcium and bone. Curr Rheumatol Rep, Oct;7(5):356-64.
2. Staud, R., 2005. Vitamin D: more than just affecting calcium and bone. Curr Rheumatol Rep, Oct;7(5):356-64.
3. Cannell, J.J., Hollis, B.W. 2008. Use of vitamin D in clinical practice, Altern Med Rev, Mar;13(1):6-20.
4. Cannell, J.J., et al. 2008. On the epidemiology of influenza, Virol J, Feb 25;5:29.
5. Holick, M.F. 2004. Vitamin D: importance in the prevention of cancers, type 1 diabetes, heart disease, and osteoporosis, Am J Clin Nutr, 79:362-71.
6. Garland, C.F., et al. 2009 Vitamin D for cancer prevention: global perspective, Ann Epidemiol. Jul;19(7):468-83.
7. Garland, C.F., et al. 2007. Vitamin D and prevention of breast cancer: pooled analysis., J Steroid Biochem Mol BiolMar;103(3-5):708-11.


© Christiane Northrup, Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.

Christiane Northrup, M.D., a board-certified ob/gyn, is a visionary pioneer, beloved authority in women's health and wellness, and the author of the ground breaking New York Times bestsellers Women's Bodies, Women's Wisdom and The Wisdom of Menopause. Her third book, Mother-Daughter Wisdom, was voted Amazon's #1 book of the 2005 (in two categories). Her latest books, The Secret Pleasures of Menopause and The Secret Pleasures of Menopause Playbook, teach how to experience joy, pleasure, prosperity, fulfillment, and vibrant health.

Following a 25-year career in both academic medicine and private practice, Dr. Northrup now devotes her time to helping women truly flourish on all levels through tapping into their inner wisdom.

Through her exclusive Women's Wisdom Circle, Dr. Northrup shares cutting-edge medical and lifestyle advice. For more information about Dr. Northrup and her Wisdom Circle go to www.DrNorthrup.com.

3 avistamientos

Here is a very interesting UFO report that involves an animal reaction. The incident allegedly occurred in Silverthorne, Colorado, and was reported by three witnesses to the Summit Daily.

Rod Pscholka, along with two of his friends who were visiting him for the weekend, were sitting on the deck of his home in the Ptarmigan Mountains on Sunday, July 5. The men spotted a UFO which was about 15 feet long, and traveled around the Gore Range about 1:30 PM.

One of the witnesses, Pat Mauro, is certain that what they saw was nothing conventional, and states that he also saw smaller objects moving around the main object. The object was seen for about 10 minutes, as it also moved into a meadow that was filled with elk.

"It was really, really weird," Mauro said. "It was too big to be a bird. The way it scared the elk was really strange. "It was like it was checking out the elk. "The way it was connected and moving, I've never seen anything like that before."

What could these men have seen, and why was the object interested in the elk?

Observan Ovnis

Nevada - 08-06-09 - My daughter and I were headed up to Lake Tahoe from Reno through Carson City. I had the pleasure of being the passenger for a change. We were driving through Washoe Valley when I looked up to the clouds and saw a white cylinder object flying straight north to south very fast.

I saw no tail part, no wings, nor shadows of wings, or reflections, just white. Then it went off into the distance into a cloud. Over a thirty minute span, I saw three of these things, identical, featureless, and flying in the same direction through the clouds.

The clouds were fairly thick, so I have no idea if there were more of them. source: www.mufon.com

Texas - 08-12-09 - I have witnessed an average of about six objects a night. The sightings occur as soon as the first stars appear. Bright star-like objects, moving at a rate similar to the shuttle or space station. Objects are high altitude, with varying trajectories, and behavior.

Some have descended, lit brightly, and disappeared in a vertical descent. Altitude here is around five hundred feet, we can't view satellites. Having lived in Taos Co., NM, before, I know the difference. Our location is 35 miles east of Austin, TX, in McDade. source: www.ufocasebook.com

Canada - 08-12-09 - While camping at a cabin in Long Lake near Perth, Ontario, my wife and I were sitting by the lake at a low burning camp fire looking at the stars. I noticed a moving bright object, oval shape, moving from the northwest to the southwest.

At first, I thought the object was a satellite, but it was moving too fast and the color was clearer, brighter, and a lot lower in altitude. The object took about three minutes to clear the sky line start to finish. No sound was heard. No blinking lights was seen.

The object appeared the following night at the same time, but with a different trajectory and below overcast clouds. No stars were shining at that time because of the clouds. It was traveling at a high speed but again with no sonic boom or jet engine noise.

This sighting was witnessed by my wife and myself on two nights. I did manage to videotape the object on the second night but unfortunately the video is low grade. I am a retired military person with experience within aviation field and if this was military type aircraft, I only hope it was ours. source: www.mufon.com

United Kingdom - 08-09-09 - In Dawley, Shropshire, I saw 5 (maybe 6) bright, orange objects flying in close formation over the weekend. No detail of the UFO could be made as it was too dark.

It appeared to be moving quite slowly in an easterly direction. This could be preparation for an air show though, as I also witnessed the red arrows flying over Dawley earlier the previous day heading in the same direction source: www.mufon.com

Los secretos de la gente feliz

Happiness is an age-old and sometimes elusive goal. Virtually all people want to be happy people, which is good, because happy people are better off, for reasons both obvious and subtle. Obviously, it feels good to be happy. But, looking deeper, happy people tend to enjoy benefits that unhappy people don't.

For one thing, they tend to enjoy more successes in life. You may be thinking that happiness and success go hand-in-hand because success causes happiness, not the other way around. Researchers at the University of California in Riverside thought about this, too. So they set out to test that hypotheses, and found happiness is associated with (and precedes) several successful outcomes, as well as behaviors that go along with success, proving that the relationship goes both ways: Success brings happiness, but happiness actually does bring success, too.

Another benefit that happy people share is good health. Studies have found that happy people experience lower levels of cortisol in their saliva, lower blood pressure, lower ambulatory heart rate in men, and reduced neuroendocrine, inflammatory, and cardiovascular activity. All this leads to greater health, which is definitely something to be happy about!

What Happy People Have In Common

So, what makes happy people, well, happy people? It seems that happy people tend to have a few things in common. Very happy people are found to be very social, and have stronger romantic and social relationships with others than less-happy people. Research has also found happy people to be energetic, decisive, creative, social, trusting, loving, and responsive. Rather than being strongly linked to external characteristics like socioeconomic status, gender or age, happiness is more positively associated with having a philosophical view of life, using laughter and humor, being able to relate to others, having problem-solving skills, engaging in meaningful pursuits and leisure activities, living in a positive environment, and maintaining a well-balanced lifestyle.

Como ser mas optimista

Optimism is measured by your explanatory style, or how you define events. If you can learn to define positive events as being a) because of something you did, b) a sign of more good things to come and c) evidence that good things will happen in other areas of your life, you're halfway there. If you can also think of negative events as a) not your fault, and b) isolated occurrences that have no bearing on future events or other areas of your life, you're the rest of the way there!
Difficulty: Easy
Time Required: Just a Few Extra Minutes

Here's How:

  1. When something positive happens in your life, stop to analyze your thought process for a moment. Are you giving yourself due credit for making it happen? Think of all the strengths you possess and ways you contributed, both directly and indirectly, to make this event occur. For example, if you aced a test, don't just think of how great it is that you were prepared, but also think of how your intelligence and dedication played a role.
  2. Think of other areas of your life that could be affected by this good event. Also, think of how the strengths you possess that caused this good thing to happen can also cause other positive events in your life. For example, what other good things can come from your intelligence, dedication, and ability to effectively prepare for tasks?
  3. Imagine what future possibilities could be in store. Because you hold the key to your success, shouldn't you expect to do well on future tests? Isn't a successful career a natural result?
  4. When negative events occur, think of the extenuating circumstances that could have contributed to this happening. If you do poorly on an exam, for example, were you especially busy in the preceding week? Were you somewhat sleep deprived? What outside circumstances contributed to your failure? Keep in mind that this isn't necessarily a reflection of personal weakness.
  5. Also remember that you'll have endless opportunities to do better in the future. Think of your next potential success, or other areas where you can excel.

Tips:

  1. The key to optimism is to maximize your successes and minimize your failures.
  2. It's beneficial to look honestly at your shortcomings so you can work on them, but focusing on your strengths can never hurt.
  3. Keep in mind that the more you practice challenging your thought patterns, the more automatic it'll become. Don't expect major changes in thinking right away, but do expect them to become ingrained over time.
  4. Always remember that virtually any failure can be a learning experience, and an important step toward your next success!
  5. Practice positive affirmations. They really work!

What You Need:

  • A willingness to examine your thoughts.
  • A few extra minutes to consistently reexamine your thought patterns.

Turkish Airlines amplia su flota

A pesar de la crisis esta aerolínea anunció la compra de siete A330-300 al constructor aeronáutico Airbus. 

Con estas adquisiciones la compañía turca y el consorcio europeo formalizaron el "Acuerdo de Intenciones" que suscribieron durante la celebración del Salón Aeronáutico de Le Bourget (a las afueras de París), en junio pasado.

Ambas entidades acordaron la entrega de los siete modelos de Airbus a partir de septiembre de 2010, con los que Turkish Airlines expandirá sus rutas de medio alcance.

La aerolínea incrementará su flota a 67 aviones, con cinco A310, 46 A320, nueve A340 y los siete A330 que incorporará el próximo año.

Los A330-300 tienen capacidad para 289 pasajeros.

El porche espacial ya está en funcionamiento

Ir al Portal de Ciencia@NASA

El porche espacial ya está en funcionamiento

NASA

Agosto 7, 2009: La Estación Espacial Internacional (EEI) tiene una nueva "engawa", y ya está en funcionamiento.

"Engawa" significa "porche" en japonés y, aunque parezca extraño que una estación espacial lo tenga, los investigadores habían estado esperando que lo agregaran desde hace mucho tiempo. El transbordador espacial Endeavour llevó esta plataforma de construcción japonesa a la EEI el 22 de julio y los astronautas la unieron al laboratorio científico de Japón, Kibo,1 al día siguiente. Ahora, cuando un experimento científico requiera de la exposición a una dosis alta de vacío o de radiación, se la puede producir "afuera, en el porche".

Y eso es sólo el comienzo.

Arriba: La Instalación Expuesta Japonesa vista desde adentro del laboratorio científico Kibo de la Estación Espacial Internacional. [Más información]

"En la nueva Instalación Expuesta Japonesa (JEF, por su sigla en idioma inglés), los investigadores pueden llevar a cabo experimentos para ver el cosmos, la Tierra o el ambiente por donde viaja la EEI", dice Julie Robinson, científica del Programa de la EEI en el Centro Espacial Johnson, de la NASA. "Además de parecer un porche, esta estructura tiene características particulares que la diferencian de otros puntos destinados a realizar experimentos expuestos al espacio,2 ubicados en otras partes de la estación".

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Por ejemplo, la JEF cuenta con la posibilidad de controlar la temperatura. Al igual que los otros sitios destinados a experimentos en el exterior de la estación espacial, esta instalación posee una placa calentadora para el control térmico pero, a diferencia de las demás, la JEF incluye la modalidad de enfriamiento.3 Otra ventaja es que en los experimentos llevados a cabo en la JEF se puede hacer uso del brazo robot de Kibo.4

"La belleza de esto es que la carga útil puede ser diseñada para que sea fácil de conectar", dice Robinson, "de tal forma que el brazo robot la puede instalar, sin necesidad de realizar una caminata espacial".

El 24 de julio, el brazo de Kibo descargó con destreza los dos primeros experimentos de la JEF desde la plataforma de carga útil del transbordador hasta el porche y los colocó en posición.5 Estos experimentos japoneses son: SEDA-AP,6 abreviatura en idioma inglés de Equipo de Adquisición de Datos del Medio Ambiente Espacial - Carga Útil Adjunta y MAXI,7 abreviatura en idioma inglés de Monitor de Imágenes de Todo el Cielo en Rayos X.

"Los sensores de SEDA-AP medirán el medio ambiente espacial relacionado con los neutrones, el plasma, los iones pesados, las partículas de luz de alta energía, el oxígeno atómico y el polvo cósmico en baja órbita terrestre", explica Robinson.

Con este experimento, los investigadores podrán poner a prueba el temple de los materiales y el equipo expuesto a la luz ultravioleta, a la radiación del espacio profundo y a las temperaturas extremas del espacio. SEDA-AP registrará la degradación del material para ayudar a los investigadores a escoger los materiales más resistentes con el fin de construir futuros instrumentos espaciales, equipos y vehículos.

Derecha: Una imagen generada por computadora del brazo robot de Kibo colocando afuera, "en el porche", el Equipo de Adquisición de Datos del Medio Ambiente Espacial - Carga Útil Adjunta. [Ver animaciones]

MAXI es un dispositivo de rayos X que escanea todo el cielo y que posee cámaras de hendidura de rayos X que son súper-sensibles y que tienen el próposito de buscar continuamente estrellas en explosión, agujeros negros y otras fuentes cósmicas calientes de rayos X. La atmósfera terrestre absorbe los rayos X (afortunadamente para nosotros), así que los astrónomos tienen que colocar estos sensores en órbita.

"MAXI observará más de 1.000 diferentes fuentes de rayos X y cubrirá el cielo entero", relata Tai Nakamura,8 de la Agencia de Exploración Aeroespacial de Japón (JAXA, por su sigla en idioma inglés). Los datos que proporcione MAXI serán transmitidos por internet. Al detectar una fuente de rayos X, el sistema de comunicaciones de MAXI, en tierra, enviará alertas a los observadores de todo el mundo en apenas 30 segundos.

Estados Unidos tiene dos experimentos destinados para la JEF en este otoño (boreal): el Sistema de Detección Remota Ianosférica y Atmosférica (HREP-RAIDS, por su sigla en idioma inglés) y el Trazador de Imágenes Hiperespectrales para el Océano Costero (HREP-HICO, por su sigla en idioma inglés).9

"El RAIDS nos brindará información sobre las capas superiores de la atmósfera terrestre, llamadas termósfera e ionósfera", dice Robinson. "Estas capas son de gran importancia ya que allí es donde orbitan muchas naves y satélites. De acuerdo con el Laboratorio de Investigaciones Navales, el RAIDS es el estudio más completo de la termósfera y la ionósfera que se haya realizado en 20 años".

Por su parte, HICO, también construido por el Laboratorio de Investigaciones Navales, es un trazador de imágenes hiperespectrales que se utiliza para confeccionar mapas de las áreas costeras.10 Esto simplemente significa que obtendrá información detallada de la luz reflejada desde estas regiones. Los sensores multiespectrales tradicionales, como el Landsat, acumulan la luz medida en sólo algunas cuantas bandas espectrales; los sensores hiperespectrales tienen cientos de dichas bandas.

Derecha: El Trazador de Imágenes Hiperespectrales para el Océano Costero (HICO, en idioma inglés) será instalado en el porche espacial este otoño (boreal). [Más información]

"Los sensores hiperespectrales son como el Landsat pero con esteroides", dice Robinson. "Pero HICO es una unidad de prueba a la cual le falta la resolución espacial del Landsat. Trazadores de imágenes similares ya se han montado en aeronaves y otro trazador de imágenes hiperespectrales se encuentra colocado en el satélite Earth Observing-1 de la NASA como muestra tecnológica".

"La JEF nos ayudará a saber si HICO es viable para colocarlo en una plataforma satelital. El 'porche' es perfecto para poner a prueba tecnologías de imagen en el espacio antes de invertir en sofisticados sistemas ópticos para los instrumentos y colocarlos en los satélites. Si HICO tiene éxito y se desarrolla un trazador de imágenes operacional, dicho trazador podría proporcionar mapas sin precedentes de las características costeras".

La JEF puede albergar nueve diferentes experimentos al mismo tiempo y tiene espacio para equipos de comunicación, para almacenamiento y también para estacionar la plataforma expuesta-HTV japonesa.11

Muchas nuevas e interesantes investigaciones se han planeado para llevar a cabo en la JEF. Manténgase en contacto con Ciencia@NASA para obtener más actualizaciones enviadas desde el porche.

Geografia Urbana

Urban geography is a branch of human geography concerned with various aspects of cities. An urban geographer's main role is to emphasize location and space and study the spatial processes that create patterns observed in urban areas. To do this, they study the site, evolution and growth, and classification of villages, towns and cities as well as their location and importance in relation to different regions and cities. Economic, political and social aspects within cities are also important in urban geography.

In order to fully understand each of these aspects of a city, urban geography represents a combination of many other fields within geography. Physical geography for example is important in understanding why a city is located in a specific area as site and environmental conditions play a large role in whether or not a city develops. Cultural geography can aid in understanding various conditions related to an area's people, while economic geography aids in understanding the types of economic activities and jobs available in an area. Fields outside of geography such as resource management, anthropology and urban sociology are also important.

Definition of a City

An essential component within urban geography is defining what a city or urban area actually is. Although a difficult task, urban geographers generally define the city as a concentration of people with a similar way of life based on job type, cultural preferences, political views and lifestyle. Specialized land uses, a variety different institutions and use of resources also help in distinguishing one city from another.

In addition, urban geographers also work to differentiate areas of different sizes. Because it is hard to find sharp distinctions between areas of different sizes, urban geographers often use the rural-urban continuum to guide their understanding and help classify areas. It takes into account hamlets and villages which are generally considered rural and consist of small, dispersed populations, as well as cities and metropolitan areas considered urban with concentrated, dense populations.

History of Urban Geography

The earliest studies of urban geography in the United States focused on site and situation. This developed out of the man-land tradition of geography which focused on the impact of nature on humans and vice versa. In the 1920s, Carl Sauer became influential in urban geography as he motivated geographers to study a city's population and economic aspects with regard to its physical location. In addition, central place theory and regional studies focused on the hinterland (the rural outlying are supporting a city with agricultural products and raw materials) and trade areas were also important to early urban geography.

Throughout the 1950s and 1970s, geography itself became focused on spatial analysis, quantitative measurements and the use of the scientific method. At the same time, urban geographers began quantitative information like census data to compare different urban areas. Using this data allowed them to do comparative studies of different cities and develop computer based analysis out of those studies. By the 1970s, urban studies were the leading form geographic research.

Shortly thereafter, behavioral studies began to grow within geography and in urban geography. Proponents of behavioral studies believed that location and spatial characteristics could not be held solely responsible for changes in a city. Instead, changes in a city arise from decisions made by individuals and organizations within the city.

By the 1980s, urban geographers became largely concerned with structural aspects of the city related to underlying social, political and economic structures. For example, urban geographers at this time studied how capital investment could foster urban change in various cities.

Throughout the late 1980s until today, urban geographers have begun to differentiate themselves from one another, therefore allowing the field to be filled with a number of different viewpoints and focuses. For example, a city's site and situation is still regarded as important to its growth, as is its history and relationship with its physical environment and natural resources. People's interactions with each other and political and economic factors are still studied as agents of urban change as well.

Themes of Urban Geography

Although urban geography has several different focuses and viewpoints, there are two major themes that dominate its study today. The first of these is the study of problems relating to the spatial distribution of cities and the patterns of movement and links that connect them across space. This approach focuses on the city system. The second theme in urban geography today is the study of patterns of distribution and interaction of people and businesses within cities. This theme mainly looks at a city's inner structure and therefore focuses on the city as a system.

In order to follow these themes and study cities, urban geographers often break down their research into different levels of analysis. In focusing on the city system, urban geographers must look at the city on the neighborhood and citywide level, as well as how it relates to other cities on a regional, national and global level. To study the city as a system and its inner structure as in the second approach, urban geographers are mainly concerned with the neighborhood and city level.

Jobs in Urban Geography

Since urban geography is a varied branch of geography that requires a wealth of outside knowledge and expertise on the city, it forms the theoretical basis for a growing number of jobs. According to the Association of American Geographers, a background in urban geography can prepare one for a career in such fields as urban and transportation planning, site selection in business development and real estate development.

Problemas en Florida

Two news items caught my eye this week about trouble in Florida. The first article from newgeography discusses the economic problems that Orlando is seeing as a result of it's super-specialization as an entertainment and leisure destinations. Since the economy has suffered a downturn, fewer people are headed to Orlando for vacation and, most importantly, for conferences and that means big trouble for a non-diversified city like Orlando.

The second item in the news is that Florida's population decreased from April 1, 2008 to April 1, 2009 for the first time since World War II. The University of Florida's Bureau of Economic and Business Research made the announcement that Florida lost 58,294 people in one year. The speculation of the cause is that due to the economy and retirement issues, fewer people were able to retire to Florida, limiting population growth.

Feliz cumpleaños Galileo

On August 25, 1609, Galileo Galilei took a Dutch invention - the telescope - and improved upon it, creating a device that used the power of optics (a science involved much guesswork, since the details of optics were developed years later by Sir Isaac Newton) to view very distant objects as if they were close up. With this telescope, Galileo looked toward the sky and saw that other planets contained moons, and ushering in the age of telescopic astronomy. He also began conflicting with the orthodox biblical interpretations of the Catholic Church, which lead to him being placed under house arrest for heresy ... which just goes to show that no good deed goes unpunished.

Now, 400 years later, he is honored with a stylish Google logo.

Portrait of Galileo Galilei, painted by Justus Sustermans in 1636
Source: Wikimedia Commons/Public Domain

You can get more details on Galileo's discovery of the telescope at National Geographic. Learn more about astronomy at the About.com Space/Astronomy site (which is, incidentally, still looking for a new guide), or through the various activities promoted by the International Year of Astronomy 2009 program.


"Galileo Facing the Roman Inquisition" by Christiano Banti, 1857
Source: Wikimedia Commons/Public Domain

Nueva teoria de la gravedad

This spring, physicist Petr Horava introduced an intriguing idea - that one of the physical principles at the heart of general relativity might be violated. The principle is called Lorentz symmetry (or Lorentz invariance) and it is the principles that physics is the same in any reference frame. The Lorentz violation would only happen at very small scales, of course, which is why it's never been observed to be violated, but if Horava's theory is correct then a theory which doesn't include Lorentz invariance at small scales might still give rise to Lorentz invariance at large scales. The great benefit of this theory, if it can be fully worked out, is that it would be much easier to introduce quantum mechanics into the theory. (General relativity and quantum mechanics are not currently able to work together easily in the same theoretical frameworks.)

A team out of Texas A&M University have now  investigated how Horava's theory would affect generic solutions of general relativity, such as those that are spherically symmetrical. Another physicist, Horatiu Nastase, has taken this work and believes that, as it currently exists, the scales are off  and Lorentz invariance would only be replicated on scales larger than the observable universe. "Modifications of the detailed balance action, within Hořava theory, can cure this problem," explains Nastase. He also points out, "It is still not known if the quantum Hořava theory makes sense, and more work in that direction is needed."

Other alternative gravity theories, such as those discussed in John Moffat's Reinventing Gravity: A Physicist Goes Beyond Einstein, have been bouncing around in some form or another pretty much since before Einstein even completed general relativity in the first place. The difference between these other theories and the Horava theory, according to Nastase, is that "Hořava['s] theory presents the tantalizing possibility that we have a well-defined quantum theory at short distances, without the need for additional fields."

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Recordando a la princesa Diana



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August 31, 2009

Princess Diana Remembered 12 Years Later: See Her Most Stylish Moments (PHOTOS)

Princess Diana, who along with companion Dodi Al-Fayed lost her life in a fatal car accident in Paris 12 years ago today, was a faithful follower of fashion and a worldwide style icon. Here are just a few looks that have stood the test of time.

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sábado, 29 de agosto de 2009

Despega el transbordador espacial

CABO CAÃ'AVERAL, Florida, EE.UU. (AP) " El transbordador espacial Discovery finalmente despegó de la Tierra y se dirige hacia la base espacial internacional.

El Discovery y sus siete astronautas, dos de ellos hispanos, lograron el despegue poco antes de la medianoche del viernes, iluminando el cielo y cuya estela podía ser vista desde algunos kilómetros de distancia.

Fue el tercer intento de despegue de la NASA. El primer intento del martes fue cancelado por tormetas eléctricas y la del miércoles se debió a un problema con una válvula de combustible.

Esta vez todo pareció estar a favor de la NASA. El transbordador lelva a bordo un gran cargamento de suministros para la base espacial, entre ellos un equipo para correr llamado Stephen Colbert, un actor del canal Comedy Central. El comediante deseaba que una sala de la base llevara su nombre en la base internacional, pero tuvo que conformarse y un equipo de ejercicios llevará su nombre como premio de consolación.

El transbordador llegará a la base orbital el domingo por la noche.

___

En la Internet:

NASA: http://www.nasa.gov/mission(underscore)pages/shuttle/main/index.html

martes, 25 de agosto de 2009

Chocolate

PARIS (AFP) – Heart attack survivors who eat chocolate two or more times per week cut their risk of dying from heart disease about threefold compared to those who never touch the stuff, scientists have reported.

Smaller quantities confer less protection, but are still better than none, according to the study, which appears in the September issue of the Journal of Internal Medicine.

Earlier research had established a strong link between cocoa-based confections and lowered blood pressure or improvement in blood flow.

It had also shown that chocolate cuts the rate of heart-related mortality in healthy older men, along with post-menopausal women.

But the new study, led by Imre Janszky of the Karolinska Institute in Stockholm, is the first to demonstrate that consuming chocolate can help ward off the grim reaper if one has suffered acute myocardial infarction -- otherwise known as a heart attack.

"It was specific to chocolate -- we found no benefit to sweets in general," said Kenneth Mukamal, a researcher at Beth Israel Deaconess Medical Center in Boston and a co-author of the study.

"It seems that antioxidants in cocoa are a likely candidate" for explaining the live-saving properties, he told AFP in an exchange of e-mails.

Antioxidants are compounds that protect against so-called free radicals, molecules which accumulate in the body over time that can damage cells and are thought to play a role in heart disease, cancer and the aging process.

In the study, Janszky and colleagues tracked 1,169 non-diabetic men and women, 45-to-70 years old, in Stockholm County during the early 1990s from the time they were hospitalised with their first-ever heart attack.

The participants were queried before leaving hospital on their food consumption habits over the previous year, including how much chocolate they ate on a regular basis.

They underwent a health examination three months after discharge, and were monitored for eight years after that. The incidence of fatal heart attacks correlated inversely with the amount of chocolate consumed.

"Our findings support increasing evidence that chocolate is a rich source of beneficial bioactive compounds," the researchers concluded.

The results held true for men and women, and across all the age groups included in the study.

Other factors that might have affected the outcome -- alcohol consumption, obesity, smoking -- were also taken into account.

So should we all be loading up on cocoa-rich sweets?

"To be frank, I'm pretty cautious about chocolate because we're working on weight problems with so many individuals," said Mukamal, who is also a practising physician.

"However, I do encourage those who are looking for healthier desserts to consider chocolate in small quantities," he said.

"For individuals with no weight issues who have been able to eat chocolate in moderation and remain slim, I do not limit it," he added.

The researchers caution that clinical trials are needed to back up the findings of their study.

In the meantime, however, a bit of chocolate may not be amiss, they suggest.

Novedades de La Página del Idioma Español




NOVEDADES DE LA PÁGINA DEL IDIOMA ESPAÑOL
Agosto de 2009


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Los pioneros del español en la internet

La Página del Idioma Español nació el 23 de abril de 1996 en Río de Janeiro, en los primeros meses de la llegada de internet a Brasil, como forma de atender la escasa oferta que había en esa época en la red de material sobre la lengua española. Aún no existían sitios como el de la Academia Española, el Instituto Cervantes o la Fundéu. La Página del Idioma Español fue la primera en toda la internet. Y el foro comenzó a funcionar el 10 de agosto de 2002, según declaró su creador, Ricardo Soca, al diario argentino El Liberal.
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Norma Tow: «Se puede aprender más de lo imaginable»
Norma Tow, médica, escritora y correctora, que tiene a su cargo la sección Corrección y lenguaje de la Página del Idioma Español y además es una de los moderadores del foro Cervantes, también respondió a la requisitoria periodística. Consultada en cuanto a qué aprendió a lo largo de estos siete años del foro Cervantes, contestó: "El intercambio cotidiano con compañeros de diferentes países hispanohablantes y de variadas regiones dentro de cada país me permitió abandonar el criterio de corrección como una normativa única instituida hegemónicamente.
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La corrección lingüística en el periodismo
La corrección lingüística integral consiste en escribir artículos que todo el mundo entienda. Si queremos expresar la idea de conscientizar no podemos ni debemos emplear el verbo concienciar que es un españolismo que pocos lectores argentinos o uruguayos van a entender, explica Ricardo Soca. Ese tipo de corrección, basado exclusivamente en el diccionario, es la antítesis del periodismo; la obligación del periodista es comunicar el mensaje que tiene para transmitir de manera tal que quien lo recibe lo entienda en forma clara y cabal.
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Los nombres de las artes marciales
Para el castellano, las artes marciales suponen un particular viaje por el mundo con numerosas figuras, piruetas y acrobacias del lenguaje en el que destacan los nombres de sistemas, métodos, formas de combate... creadas por deportistas con origen en países que hablan nuestra lengua, según nos cuenta el Jesús Castañón Rodríguez, especializado en el español en los deportes.
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Kepler detecta la atmosfera de un exoplaneta

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Kepler detecta la atmósfera de un exoplaneta

Kepler, el nuevo telescopio espacial "cazador de planetas" de la NASA, ha detectado la atmósfera y fases cambiantes de un planeta ubicado a mil años luz de distancia.

NASA

Agosto 6, 2009: Kepler, el nuevo telescopio espacial "cazador de exoplanetas", de la NASA, ha detectado la atmósfera de un conocido y gigante planeta gaseoso, demostrando de este modo las extraordinarias capacidades científicas que posee el telescopio. El descubrimiento será publicado el viernes en la revista científica Science.

"Tratándose de la primera misión de la NASA relacionada con exoplanetas, Kepler ha realizado una impresionante entrada en la escena de la caza de exoplanetas", comenta Jon Morse, director de la División de Astrofísica del Directorio de Misiones Científicas, en las oficinas centrales de la NASA, ubicadas en Washington. "La detección de la atmósfera de este planeta en tan sólo los primeros 10 días de recolección de datos es apenas una muestra de lo que viene. ¡La caza de planetas ha comenzado!"

Derecha: Representación artística de un exoplaneta que orbita cerca de su sol. Crédito de la imagen: NASA.

La misión Kepler, lanzada el 6 de marzo de 2009, desde la estación de la Fuerza Aérea Cabo Cañaveral, en Florida, pasará los próximos tres años y medio buscando planetas tan pequeños como la Tierra, incluyendo a aquellos que se encuentran girando en órbita alrededor de estrellas dentro de una tibia zona denominada "Ricitos de Oro" ("Goldilocks Zone", en idioma inglés) en donde podría haber agua. Buscará disminuciones periódicas en el brillo de las estrellas, las cuales tienen lugar cuando los planetas que las orbitan están en tránsito, o cruzan frente a las estrellas.

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"Cuando las curvas de luz de decenas de miles de estrellas se mostraron al equipo científico de la misión Kepler, todos quedaron sorprendidos; nadie antes había visto mediciones tan exquisitamente detalladas de las variaciones de luz de tantos tipos distintos de estrellas", dijo William Borucki, el principal científico investigador y autor principal del artículo.

Las observaciones recolectadas provienen de un planeta denominado HAT-P-7, el cual, se sabe, transita una estrella ubicada a aproximadamente 1.000 años luz de la Tierra. El planeta completa la órbita de la estrella en sólo 2,2 días y se encuentra 26 veces más cerca del Sol que la Tierra. Su órbita, combinada con una masa algo más grande que la de Júpiter, permite clasificar a este planeta como un "Júpiter caliente". El planeta se encuentra tan cercano a su estrella, que es tan caliente como el dispositivo radiante rojo de un horno de cocina.

El planeta HAT-P-7 ya se conocía antes de que el telescopio Kepler dirigiera su atención hacia él. Sin embargo, las mediciones efectuadas por Kepler son tan precisas, que de hecho muestran algo nuevo: una pequeña elevación y disminución de la luz causada por las fases cambiantes del planeta, las cuales son similares a las fases de nuestra propia Luna. Kepler también pudo ver cómo la luz del planeta desaparecía por completo cuando pasaba por detrás de su estrella. Este acto de desaparición es conocido como "ocultación".

ver imagen

Arriba: Una comparación de las curvas de luz obtenidas desde la Tierra y las obtenidas desde el espacio para el caliente exoplaneta HAT P7b. Crédito de la imagen: NASA. [Imagen ampliada]

Los nuevos datos proporcionados por Kepler pueden ser utilizados para estudiar a este caliente Júpiter con un nivel de detalle que no registra precedentes. El tiempo de la ocultación, así como la forma y amplitud de la curva de luz, muestran que el planeta posee una atmósfera en su fase diurna con una temperatura de aproximadamente 2.377 grados centígrados (alrededor de 4.310 grados Fahrenheit). Poca cantidad de este calor se transfiere al lado nocturno y fresco del planeta. La comparación entre el tiempo de ocultación y el total de tránsito indica que el planeta posee una órbita circular. El descubrimiento de la luz que proviene de este planeta confirma las predicciones de investigadores y de modelos teóricos de que las emisiones serían detectables por el telescopio Kepler.

Las variaciones observadas en la intensidad de la luz son de tan sólo una y media vez lo que se esperaría para un tránsito causado por un planeta del tamaño de la Tierra. A pesar de que se trata de la medición de mayor precisión jamás obtenida para esta estrella, Kepler será aún más preciso después de que finalice el desarrollo del software para el análisis de datos de la misión.

"Este resultado preliminar muestra que el sistema de detección del telescopio Kepler está trabajando precisamente como se esperaba", dijo David Koch, investigador principal adjunto del Centro de Investigaciones AMES, de la NASA, ubicado en Moffett Field, California. "Es un buen augurio para las perspectivas de la misión Kepler el hecho de que ya sea capaz de detectar planetas del tamaño de la Tierra".

Manténgase en contacto con Ciencia@NASA para recibir más información sobre la misión Kepler.

Como revertir la Diabetes tipo 2

Breaking news!

Some newly discovered compounds have just been found to turn off all of the genes that cause diabetes.

Are these compounds found in a pill bottle? No!

Instead, you'll find them on your dinner plate -- in rye bread and pasta.

(As I recently wrote in one of my blogs, rye contains special phytonutrients that turn off all the genes responsible for diabetes -- in just a few weeks.)

Last week, I explained how to find out if you are pre-diabetic or diabetic. Half of the 24 million people with diabetes don't know they have it and nearly all the 60 million people with pre-diabetes don't know they have it.

Today, I want to share with you more information about what you can do NOW to prevent and reverse diabetes and pre-diabetes.

And rye bread isn't the only answer -- I've got a lot more good advice, too.

But first I want to emphasize new research that should be headlines news but never saw the light of day. Do our current drugs treatments for diabetes actually work to prevent heart attacks and death?

Surely lowering blood sugar in diabetics is an effective strategy for reducing the risk of death and heart disease. It would seem obvious that if diabetes is a disease of high blood sugar, then reducing blood sugar would be beneficial.

However elevated sugar is only a symptom, not the cause of the problem. The real problem is elevated insulin unchecked over decades from a highly refined carbohydrate diet, a sedentary lifestyle and environmental toxins.

Most medications and insulin therapy are aimed at lowering blood sugar through increasing insulin. In the randomized ACCORD trial of over 10,000 patients, this turns out to be a bad idea.

In the intensive glucose-lowering group, there were no fewer heart attacks, and more patients died. Yet we continue to pay $174 billion annually for this type of care for diabetes, despite evidence that lifestyle works better than medications. We also pay for cardiac bypass and angioplasty in diabetics when evidence shows no reduction in death or heart attacks compared to medication.

So now that we know what doesn't work, let me review what does work.

Dietary Recommendations to Reverse Diabetes

Eating in a way that balances your blood sugar, reduces inflammation and oxidative stress, and improves your liver detoxification is the key to preventing and reversing insulin resistance and diabetes.

This is a way of eating that based on a whole foods diet that's high in fiber, rich in colorful fruits and vegetables, and low in sugars and flours, with a low glycemic load.

It is a way of eating that includes anti-inflammatory, antioxidant, and detoxifying foods. It includes plenty of omega-3 fats and olive oil, soy products, beans, nuts, and seeds.

All these foods help prevent and reverse diabetes and insulin resistance. This is the way of eating than turns on all the right gene messages, promotes a healthy metabolism, and prevents aging and age-related diseases like diabetes and heart disease.

Here are more specifics.

Meal Timing

• Eat protein for breakfast every day, such as whole omega-3 eggs, a soy protein shake, or nut butters.

• Eat something every 4 hours to keep your insulin and glucose levels normal.

• Eat small protein snacks in the morning and afternoon, such as a handful of almonds.

• Finish eating at least 2 to 3 hours before bed. If you have a snack earlier in the day, you won't be as hungry, even if you eat a little later.

Meal Composition

• Controlling the glycemic load of your meals is very important.

• You can do this by combining adequate protein, fats, and whole-food carbohydrates from vegetables, legumes, nuts, seeds, and fruit at every meal or snack.

• It is most important to avoid eating quickly absorbed carbohydrates alone, as they raise your sugar and insulin levels.

Travel Suggestions

• Two handfuls of almonds in a zip-lock bag make a useful emergency snack. You can eat them with a piece of fruit. Remember, real food is the best.

What to Eat

Choose from a variety of the following real, whole foods:

• Choose organic produce and animal products whenever possible.

• Eat high-quality protein, such as fish -- especially fatty, cold-water fish like salmon, sable, small halibut, herring, and sardines -- and shellfish.

• Cold-water fish such as salmon, halibut, and sable contain an abundance of beneficial essential fatty acids, omega-3 oils that reduce inflammation. Choose smaller wild Alaskan salmon, sable, and halibut that are low in toxins. Canned wild salmon is a great "emergency" food.

• Eat up to eight omega-3 eggs a week.

• Create meals that are high in low-glycemic legumes such as lentils, chickpeas, and soybeans (try edamame, the Japanese soybeans in a pod, quickly steamed with a little salt, as a snack). These foods slow the release of sugars into the bloodstream, which helps prevent the excess insulin release that can lead to health concerns like obesity, high blood pressure, and heart problems.

• Eat a cornucopia of fresh fruits and vegetables teeming with phytonutrients like carotenoids, flavonoids, and polyphenols, which are associated with a lower incidence of nearly all health problems, including obesity and age-related disease.

• Eat more low-glycemic vegetables, such as asparagus, broccoli, kale, spinach, cabbage, and Brussels sprouts.

• Berries, cherries, peaches, plums, rhubarb, pears, and apples are optimal fruits. Cantaloupes and other melons, grapes, and kiwifruit are suitable; however, they contain more sugar. You can use organic frozen berries (such as those from Cascadian Farms) in your protein shakes.

• Focus on anti-inflammatory foods, including wild fish and other sources of omega-3 fats, red and purple berries (these are rich in polyphenols), dark green leafy vegetables, orange sweet potatoes, and nuts.

• Eat more antioxidant-rich foods, including orange and yellow vegetables, dark green leafy vegetables (kale, collards, spinach, etc.), anthocyanidins (berries, beets, grapes, pomegranate), purple grapes, blueberries, bilberries, cranberries, and cherries. In fact, antioxidants are in all colorful fruits and vegetables.

• Include detoxifying foods in your diet, such as cruciferous vegetables (broccoli, kale, collards, Brussels sprouts, cauliflower, bok choy, Chinese cabbage, and Chinese broccoli), green tea, watercress, dandelion greens, cilantro, artichokes, garlic, citrus peels, pomegranate, and even cocoa.

• Season your food with herbs such as rosemary, ginger, and turmeric, which are powerful antioxidants, anti-inflammatories, and detoxifiers.

• Avoid excessive quantities of meat. Eat lean organic or grass-fed animal products, when possible. These include eggs, beef, chicken, pork, lamb, buffalo, and ostrich. There are good brands at Whole Foods and other local health-food stores (also see mail order sources).

• Garlic and onions contain antioxidants, enhance detoxification, act as anti-inflammatories, and help lower cholesterol and blood pressure.

• A diet high in fiber further helps to stabilize blood sugar by slowing the absorption of carbohydrates and supports a healthy lower bowel and digestive tract. Try to gradually increase fiber to 30 to 50 grams a day and use predominantly soluble or viscous fiber (legumes, nuts, seeds, whole grains, vegetables, and fruit), which slows sugar absorption from the gut.

• Use extra virgin olive oil, which contains anti-inflammatories and anti-oxidants, as your main cooking oil.

Soy Products such as soymilk, soybeans, and tofu are rich in antioxidants that can reduce cancer risk, lower cholesterol, and improve insulin and blood sugar metabolism.

• Increase your intake of nuts and seeds, including raw walnuts, almonds, macadamia nuts, and pumpkin and flax seeds.

• And yes ... chocolate can be healthy, too. Choose only the darkest varieties and eat only 2 to 3 ounces a day. It should contain 70 percent cocoa.

Decrease (or ideally eliminate) your intake of:

• All processed or junk foods

• Foods containing refined white flour and sugar, such as breads, cereals (cornflakes, Frosted Flakes, puffed wheat, and sweetened granola), flour-based pastas, bagels, and pastries

• All foods containing high-fructose corn syrup

• All artificial sweeteners (aspartame, Sorbitol, etc.) and caffeine

• Starchy, high-glycemic cooked vegetables, such as potatoes, corn, and root vegetables such as rutabagas, parsnips, and turnips

• Processed fruit juices, which are often loaded with sugars (Try juicing your own carrots, celery, and beets, or other fruit and vegetable combinations, instead)

• Processed canned vegetables (usually very high in sodium)

• Foods containing hydrogenated or partially hydrogenated oils (which become trans fatty acids in the bloodstream), such as most crackers, chips, cakes, candies, cookies, doughnuts, and processed cheese

• Processed oils such as corn, safflower, sunflower, peanut, and canola

• Red meats (unless organic or grass-fed) and organ meats

• Large predatory fish and river fish, which contain mercury and other contaminants in unacceptable amounts, including swordfish, tuna, tilefish and shark

Dairy -- substitute unsweetened, gluten free soymilk, almond milk, or hazelnut milk products

• Alcohol -- limit it to no more than 3 glasses a week of red wine per week

Balance Blood Sugar with Exercise

Exercise is critical for the improvement of insulin sensitivity. It helps reduce central body fat, improving sugar metabolism. Regular exercise will help prevent diabetes, reduce your risk of complications, and even help reverse it.

Ideally you should do 30 minutes of walking every day. Walking after dinner is a powerful way to reduce your blood sugar.

More vigorous exercise and sustained exercise is often needed to reverse severe insulin resistance or diabetes. Doing sustained aerobic exercise for up to 60 minutes 5 to 6 times a week is often necessary to get diabetes under full control. You want to work at 70 to 85 percent of your target heart rate, which you can find by subtracting your age from 220 and multiplying that number by 0.70 to 0.85.

Interval training can be an added benefit to helping improve your metabolism and mitochondrial function. It helps to increase the efficiency calorie burning so that you burn more calories and energy during the time you are NOT exercising. This is described in detail in UltraMetabolism.

Strength training also helps maintain and build muscle, which can help also with your overall blood sugar and energy metabolism.

Supplements that Can Help Reverse Diabetes

Nutritional supplements can be very effective for Type 2 diabetes and insulin resistance. I recommend a number of different supplements, depending on the severity of the problem:

1. A multivitamin and mineral.

2. Calcium and magnesium and vitamin D.

3. Fish oil (1,000 to 4,000 mg) a day improves insulin sensitivity, lowers cholesterol, and reduces inflammation.

4. Extra magnesium (200 to 600 mg a day) helps with glucose metabolism and is often deficient in diabetics.

5. Chromium (500 to 1,000 mcg day) is very important for proper sugar metabolism.

6. Antioxidants (such as vitamins C and E) are important in helping to reduce and balance blood sugar.

7. B-complex vitamins are important and are part of a good multivitamin. Extra vitamin B6 (50 to 150 mg a day) and B12 (1,000 to 3,000 mcg) are especially helpful in protecting against diabetic neuropathy or nerve damage.

8. Biotin (2,000 to 4,000 mcg a day) enhances insulin sensitivity.

9. I also encourage people to use alpha-lipoic acid (300 mg twice a day), a powerful antioxidant that can reduce blood sugar significantly. It also can be effective for diabetic nerve damage or neuropathy.

10. Evening primrose oil (500 to 1,000 mg twice a day) helps overcome deficiencies common in diabetics.

11. I encourage people to use cinnamon as a supplement. One to two 500 mg tablets twice a day can help blood sugar control.

12. Other herbs and supplements that can be helpful include green tea, ginseng, bitter melon, gymnema, bilberry, ginkgo, onions, and garlic. Fenugreek can also be used to help improve blood sugar ,although large amounts must be taken.

13. Banaba leaf (Lagerstroemia speciosa) can be an effective herb. Take 24 mg twice a day.

14. I recommend konjac fiber, such as PGX (WellBetX), four capsules 10 minutes before meals with a glass of water. This helps reduce blood sugar after meals and improves long-term blood sugar control while reducing appetite and cholesterol.

Manage Diabetes by Managing Stress

Stress plays a dramatic role in blood sugar imbalances. It triggers insulin resistance, promotes weight gain around the middle, increases inflammation, and ultimately can cause diabetes. So it's essential to engage in relaxation practices on a regular basis, such as yoga, breathing, progressive muscle relaxation, guided imagery, hot baths, exercise, meditation, massage, biofeedback, hypnosis, or even making love. Your survival depends on it.

Use Medications if Necessary

A number of medications may be helpful for diabetes. There are several specific classes of medications, each with their own effects. Sometimes combinations are helpful.

These are the main classes.

1. The biguanides, especially metformin (Glucophage), is one of the best medications to improve insulin sensitivity. It can help lower blood sugars by improving your cells' response to insulin.

2. Thiazolidinedione drugs are a new class of diabetes medication and can help improve uptake of glucose by the cells by making you more insulin-sensitive. They also reduce inflammation and help improve metabolism working on the PPAR, a special class of cell receptors that control metabolism. They can cause weight gain and liver damage. Thiazolidinediones include rosiglutazone (Avandia) and pioglitazone (Actos).

3. Alpha-glucosidase inhibitors include acarbose and miglitol, which can help lower the absorption of sugar and carbohydrates in the intestines, reducing the absorption of sugar after meals. And there are newer medication on the market every day.

Older medications include sulfonylureas include glipizide, glyburide, and glimepiride. I strongly recommend against these medications because they only reduce your sugar in the short term and cause further insulin production, which actually worsens diabetes over the long term. They have also been linked to high risk of heart attacks, which you are trying to prevent. They treat the symptoms rather than the cause.

Insulin is the last resort after all other measures have failed and often leads to a slippery slope of weight gain and increased cholesterol and blood pressure. Many patients have been able to come off insulin entirely if they are treated early and aggressively through the other methods I've listed.

Diabetes and its precursor, insulin resistance, are looming as the major threat to our health in the 21st century. It will affect 1 in 3 children born today, and 1 in 2 minority children. This is a tragic consequence of our toxic food environment, our unmitigated exposure to stress, our sedentary lifestyle, and environmental toxins.

However, these problems are completely preventable and often reversible through aggressive lifestyle changes, supplements, and exercise and stress management.

Diabetes is the biggest health epidemic triggered by the obesity epidemic, but all of our medical efforts to treat it are focused on medications and insulin. It is simply the wrong approach.

If you follow these guidelines instead, you will see a dramatic change very quickly in your health, your weight, and your diabetes.

Just try it!

Now I'd like to hear from you ...

Have you been diagnosed with pre-diabetes or diabetes?

Have you been told that you must take drugs to treat it?

Which of these steps do you plan to take and which are you already trying? What are the results?

Please let me know your thoughts by leaving a comment below.

To your good health,

Mark Hyman, M.D.

Mark Hyman, M.D. practicing physician and founder of The UltraWellness Center is a pioneer in functional medicine. Dr. Hyman is now sharing the 7 ways to tap into your body's natural ability to heal itself. You can follow him on Twitter, connect with him on LinkedIn, watch his videos on Youtube and become a fan on Facebook.

Mas vida

It seems that headlines today scream the risks and prevalence of chronic, life-threatening conditions. Virtually every week, there are people in the public eye falling victim to cancer, heart disease, diabetes or stroke, and it always makes me stop to think about how challenging their situations are, and how randomly these diseases seem to attack; it seems that nobody is immune. Because of the stress that serious illnesses bring to entire families and circles of friends, I was interested to see the results of a new report in the August 10/24 issue of Archives of Internal Medicine, that has some reassuring results: Four healthy lifestyle factors--never smoking, maintaining a healthy weight, exercising regularly and following a healthy diet--together appear to be associated with as much as an 80 percent reduction in the risk of developing the most common and deadly chronic diseases.

According to background information in the article, cardiovascular disease, cancer and diabetes are "chronic diseases that together account for most deaths", and are largely preventable. "An impressive body of research has implicated modifiable lifestyle factors such as smoking, physical activity, diet and body weight in the causes of these diseases," write author Earl S. Ford, M.D., M.P.H., and his colleagues.

In this study, they assessed data from 23,513 German adults age 35 to 65. At the beginning of the European Prospective Investigation Into Cancer and Nutritional "Potsdam (EPIC-Potsdam) study" between 1994 and 1998 participants answered questions about their body weight and height, diseases, sociodemographic and lifestyle characteristics and diet.

Their responses were analyzed according to four healthy lifestyle factors: never smoking, having a body mass index lower than 30, exercising for at least three and a half hours per week and following healthy dietary principles (for example, having a diet with high consumption of fruits and vegetables while limiting meat consumption). Follow-up questionnaires were administered every two to three years.

Most participants had one to three of these health factors, fewer than 4 percent had zero healthy factors and 9 percent had all four factors. Over an average of 7.8 years of follow-up, 2,006 participants developed new cases of diabetes (3.7 percent), heart attack (0.9 percent), stroke (0.8 percent) or cancer (3.8 percent).

After adjusting for age, sex, education level and occupation, individuals with more healthy lifestyle factors were less likely to develop chronic diseases. Participants who had all four factors at the beginning of the study had a 78 percent lower risk of developing any of the chronic diseases during the follow-up period than those who had none of the healthy factors. The four factors were associated with a 93 percent reduced risk of diabetes, 81 percent reduced risk of heart attack, 50 percent reduced risk of stroke and 36 percent reduced risk of cancer.

The largest reduction in risk was associated with having a BMI lower than 30, followed by never smoking, at least 3.5 hours of physical activity and then adhering to good dietary principles.

"Our results reinforce current public health recommendations to avoid smoking, to maintain a healthy weight, to engage in physical activity appropriately and to eat adequate amounts of fruits and vegetables and foods containing whole grains and to partake of red meat prudently", the authors write. "Because the roots of these factors often originate during the formative stages of life, it is especially important to start early in teaching the important lessons concerning healthy living".

The implications of this study are important from a stress management perspective because chronic illness obviously causes a great deal of stress, <i>and</i> stress can affect some of the factors that contribute to chronic illness. For example, stress can lead to poor diet choices through cortisol cravings, and emotional eating, as well as other factors (see this article on stress and diet), and a poor diet can lead to greater reactivity to stress. Stress has also been associated with metabolic syndrome (read more about stress and metabolic syndrome, which is linked with diabetes. There is a clear link between stress and cardiovascular disease, both direct and indirect. And stress is also linked with an increased stroke risk, though more research needs to be done.

Stress is also linked to factors that increase the risk of these conditions. For example, stress can be a trigger for most smokers, and remains one of the biggest obstacles for those attempting to quit. Emotional eating and cortisol cravings can lead to weight gain and, conversely, a higher BMI. Stressed people are often busy people, and busy people often don't feel they have the time or energy to exercise. The links are manifold.

The following resources can help you start today in making changes that can greatly lower your risk of developing these chronic conditions by changing your lifestyle and managing your stress levels. Share them with your loved ones, and we can all help reduce the prevalence of these serious and somewhat preventable conditions.

Resources for Healthy Living

Stress and Diet

Exercise for Busy People

Stress and Heart Disease

Source:
Earl, E.S. www.jamamedia.orgwww.jamamedia.org 2009.

Estres bueno

Today, I'm on my way to the fair with my children. We're meeting some friends for a day of fun. There are many cool things at the fair, but what beckons me to drive a considerable distance to immerse myself in an environment where my children will beg to buy cheap toys for triple their value, rides have been known to fall apart mid-spin, and virtually all the food is deep-fried (including Oreos and Twinkies--I'm not making this up!) is the promise of stress. Specifically, eustress. And most of my fellow fair-goers are doing it for the same reason. (Okay, I'm sure some will be there for the deep-fried Oreos, too.)

We do this because eustress is the 'good kind of stress' that keeps us feeling vital and alive. That's right, it's good to have some stress in life, if it's eustress. It keeps us healthy. It comes from exciting activities like riding roller coasters or playing tag, as well as from meeting challenges and pushing ourselves to succeed at areas in which we have talent. (Read this for more about types of stress.)

Things get more risky for our health and wellbeing if we experience repeated, negative stress known as chronic stress. Rather than coming from challenges and fun events, chronic stress is that negative stress that we experience when we have a stressful work environment, conflict at home, or other situations where the stress seems constant and inescapable, or excessive. Many of us experience this, too.

There are also those who don't have enough eustress in their lives from riding roller-coasters and taking on new challenges, and unwittingly create too much busy-ness or drama in their lives. Adrenaline junkies, stress addicts, drama queens--we all know them (and some of you reading this are them). There's a limit to how much stress is healthy, and those who cause excessive drama in their own lives--especially if they're not aware that they're doing it--are at risk of surpassing that limit.

Read more about types of stress and how to handle it in healthy ways, if you don't already know. It's an important part of stress management, and can help you create a healthier lifestyle. And, while you're working on a healthier lifestyle, be sure not to eat too many deep-fried Oreos!

lunes, 24 de agosto de 2009

eslogan




LA PALABRA DEL DÍA

Por Ricardo Soca

http://www.elcastellano.org/palabra.php


Sábado, 22 de agosto de 2009



ANUNCIO
TALLER EN BUENOS AIRES PARA ESCRITORES NOVELES:

La correctora Norma Tow abrirá un nuevo taller de escritura de cuentos, en modalidad presencial, en su estudio de Buenos Aires, Argentina. Para informes e inscripción: townorma@gmail.com .







Los envíos de La palabra del día están recopilados en tres libros ―La fascinante historia de las palabras, Nuevas fascinantes historias de las palabras y La milenaria historia de las palabras― totalmente independientes entre sí, cada uno de ellos ordenado de la a a la zeta.

Estas obras, escritas en lenguaje llano y ameno, accesible a todos los públicos, constituyen un viaje cautivante a través de los siglos y de las civilizaciones en busca del origen más remoto de las palabras que empleamos en nuestra vida cotidiana. Constituyen una introducción accesible a la historia de las palabras, escrita con rigor implacable, pero de lectura agradable incluso para los principiantes.

Vea nuevas reseñas de estos libros




LA PALABRA DEL DÍA

eslogan

Esta palabra, proveniente del inglés slogan, se usa actualmente para designar una consigna política, ideológica, o bien una fórmula breve, como las que se ven en publicidad y cuyo objetivo es fijar un producto en la memoria del público.

En su origen, sin embargo, un eslogan era un grito de guerra en las comunidades celtas de lengua gaélica, que habitaban Escocia y parte de Irlanda. En efecto, slogan es una alteración del escocés slogorne, procedente de la palabra gaélica sluagh-ghairm, formada por sluagh 'multitud' y ghairm 'grito'. Su sentido metafórico de 'consigna' surge en inglés en el siglo XVIII. En castellano, aparece así por primera vez en el Diccionario de la Academia en 1984:

eslogan. Frase corta significativa, que alude a algo que se pretende grabar en la mente de los demás.
Está incluida también, pero como slogan en las ediciones de 1985 y 1989.



Síganos en Twitter



EL LATÍN DEL DÍA

manus manum lávat
«Una mano lava la otra»

Un comentario:
Recibo con cierta frecuencia mensajes en los que se me señala que en latín no se escribe con tilde. El comentario es pertinente; en el latín clásico no solamente no se usaban tildes, sino que tampoco había comas, mucho menos puntos y comas, ni minúsculas ni espacios entre las palabras. Tampoco existía la letra u, en cuyo lugar se empleaba la v. La frase latina de hoy se habría escrito así en la época de Virgilio: MANVSMANVMLAVAT. Como ese sistema de escritura constituiría una dificultad para los lectores de hoy, es que se emplean algunos signos, incluso tildes, las palabras se separan y se emplean minúsculas y otras modernidades.



EL APELLIDO DEL DÍA

Amorrich
Apellido valenciano radicado desde antiguo en la localidad de Aspe en la provincia de Valencia, y en Santa Cruz de Mudela, perteneciente a Castilla la Mancha y Alicante. Hubo también personas de este linaje en Aquitania y en Languedoc, Francia.
Armas. En campo de oro, cuatro barras de azur. Bordura de plata con cinco cabezas de moros con turbantes.

NO atendemos consultas sobre apellidos. Por ampliación sobre este apellido o consultas sobre otros, vea http: //www. apellidosenlinea. com. (Es un servicio por pago).




Los derechos sobre este texto son reservados y queda terminantemente prohibida su reproducción no autorizada por cualquier medio impreso, electrónico o digital.

Por Ricardo Soca - © Asociación Cultural Antonio de Nebrija - 2002-2009

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