LOBO de CRIN o BOROCHI (Chrysocyon brachyurus)

Cánido de las pampas. Los guaraníes lo llaman aguará guazú ("zorro grande")
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A MIS LECTORAS... y al resto

“Amigos lectores que leerán este libro blog, | despójense de toda pasión | y no se escandalicen al leerlo | no contiene mal ni corrupción; | es verdad que no encontrarán nada de perfección | salvo en materia de reír; | mi corazón no puede elegir otro sujeto | a la vista de la pena que los mina y los consume. | Vale mejor tratar de reír que derramar lágrimas, | porque la risa es lo propio y noble del alma.”
--François Rabelais (circa 1534)

jueves 16 de julio de 2009

To hear or not to hear

Source
Old Man Jenkins fears his wife isn’t hearing what it used to be and he thinks she might need a hearing aid. Not quite sure how to approach her, he calls the family doctor to discuss the problem. The doctor suggests a simple informal test: “Just stand about 40 feet away from her, and in a normal conversational speaking tone see if she hears you. If not, go to 30 feet, then 20 feet, and so on until you get a response.”
That evening, Mrs. Jenkins is in the kitchen cooking dinner, and Mr. Jenkins is in the den. He says to himself, “I’m about 40 feet away, let’s see what happens.” Then in a normal tone he asks, ‘Honey, what’s for dinner?” No response. So the husband moves closer to the kitchen, about 30 feet from his wife and repeats, “Honey, what’s for dinner?” Still no response. Next he moves into the dining room where he is about 20 feet from his wife and asks, “Honey, what’s for dinner?” Again he gets no response. So, he walks up to the kitchen door, about 10 feet away. “Honey, what’s for dinner?” A gain there is no response. So he walks right up behind her. “Honey, what’s for dinner?” To which Mrs. Jenkin spins around and shouts “For the fifth time, I said CHICKEN!

miércoles 15 de julio de 2009

The Four Humors

Source

The traditionally held "Father of Medicine" was the Greek physician Hippocrates (460-370 BC), who taught medicine on the island of Cos. One of his major precepts was the rule of harmony, the theory that all body systems were in balance and that disease resulted from an imbalance. Galen (130-201 AD) was the physician to Marcus Aurelius and became the heir to Hippocrates and one of the most influential physicians of all times. He taught the importance of maintaining balance between the four bodily fluids, or "humors" (2): blood, phlegm, yellow bile, and black bile. Each fluid was associated with a specific personality characteristic. Blood was associated with a sanguine personality, that is laughter, music, and a passionate disposition. Someone with a phlegmatic personality was sluggish and dull, while yellow bile represented an individual quick to anger or choleric (cholera meaning yellow as in yellow fever). Lastly, black bile represented a melancholic or depressed personality, melan meaning black. It was the job of the physician to restore harmony in those four humors by the use of emetics, cathartics, purgatives, and by bloodletting. Bleeding was used to reduce excess circulation, to slow the pulse, and to "reduce irritation", all felt to be the cause of inflammation. Dr. Benjamin Rush, a signer of the Declaration of Independence, was a major figure in colonial American medicine and was an important proponent of bleeding, though unfortunately he mistakenly thought that the body held 12 instead of 6 quarts. Shortly before his death, George Washington was bled 4 ‡ quarts in 24 hours for an infected throat and died not long after (3).
Early transfusion was based on the notion that giving blood would help balance the humors (4,5). On June 15, 1667, Jean Davis replaced part of a patient's blood with sheep's blood though the patient died and Dr. Davis was subsequently accused of murder. Transfusion was set back until the 19th century, well before blood typing was understood.
2) Galen's Four Humors
2) Galen's Four Humors

3) G. Washington After Being Bled
3) G. Washington After Being Bled

4) Bleeding and Transfusion
4) Bleeding and Transfusion

"Justo", el eco-fogón

Fuente
La instalación de una estufa eficiente es una forma de combatir el problema de deforestación, mejorar la salud de las personas que cocinan con leña, disminuir el impacto ambiental de la combustión de la madera y aliviar una parte del trabajo diario que se asocia con la recolección de la leña. La idea de una estufa mejorada ya era conocida en varias partes del mundo pero se ha usado nueva tecnología en diferentes formas. Actualmente el enfoque de trabajo esta más centrado en la utilidad de la estufa, teniendo en cuenta las costumbres de la gente y la cultura en la que se va a implementar la tecnología. Una parte esencial de la implementación de las estufas mejoradas son los materiales que se usan; se va adaptando el diseño de la estufa a los materiales locales existentes.

La eco-estufa Justa, como elemento de cambio a llegado a convertirse en la nueva generación de fogones, superando en economía, rendimiento y estética a los fogones tradicionales, mejorados y Lorena. Con la eco-estufa “Justa” las amas de casa están cocinando durante todo el día únicamente con 7 palos de leña y además de leña utilizan otros subproductos como ser olote de maíz, cascara de coco, semilla de pino etc… Logrando un ahorro de leña del 75% con relación a otros fogones y otra ventaja importante para la salud de la familia es que no existe humo ni hollín en sus cocinas.


Los materiales necesarios para construir la estufa eco justa son:
  • 1 plancha metálica.
  • 2 tubos de chimenea de lámina galvanizada de 5” de diámetro, de 36” de largo, calibre #28.
  • 50 ladrillos rafón.
  • 2 varillas de hierro corrugada de 1⁄2” y de 24” de largo.
  • 2 varillas de hierro corrugada de 1⁄2” y de 9” de largo.
  • 1 quintal de ceniza, seca y sin carbón.
  • 8 clavos de 21⁄2” ó 3”.
  • 2 reglas de 1” x 3” x 42”.
  • 2 reglas de 1” x 3” x 36”.
  • Un codo de barro.
  • Mezcla con varios materiales.
  • Tira de cartón de 95” de largo y 3” de ancho y de 1⁄8 ”de grueso.

El “Codo Rocket” es el nombre dado a la cámara de combustión que utiliza la Estufa Justa. Es un sistema de combustión único, en que se puede adaptar a cualquier tipo de aparato, cuya función es producir calor, para mejorar su eficiencia. Unas características predominantes del “Rocket” son que siempre utiliza una entrada de combustible relativamente pequeña y siempre lleva la forma de un codo de 90º. Por medio del uso de aislante alrededor del codo, se reducen pérdidas de calor y se logra producir un alto nivel de calefacción con una entrada reducida y poco combustible. La idea no se trata de solo producir más calor con menos combustible, sino que de no desperdiciar calor ni combustible en el proceso de cocción. De esta manera funciona la Estufa Justa.

La imagen muestra el funcionamiento general de un Codo Rocket, donde el combustible se eleva a un tercio de la altura de la entrada, permitiendo un flujo de aire constante que viaja por debajo de los leños hacia las brazas y el fuego vivo.
Al chocar con la pared de atrás del codo y las brazas del fuego, el aire dispara con mucha velocidad hacia arriba, soplando las llamas y el calor hacia la superficie de cocción. Aunque no se muestra, el principio que completa el sistema es aislante alrededor de la cámara, lo cual produce temperaturas más altas y una combustión más limpia y completa.

Tipo de material de combustión que se puede utilizar en la ecoestufa:
Leña con dimensiones de corte reducido.
Olote de maíz
Bellota de pino
Caña de maíz
Cáscara de coco
Vaina de semilla de acacia
Vena de hoja de coco o palma africana
Bagazo de caña.
Ramas secas de árboles, etc.

Contacto AHDESA: Anibal Osorto Pinel, Director Ejecutivo
Comayaguela, Honduras
Teléfono: (504) 227-9224 y 9955-6554
Correo electrónico: ahdesa_hn@yahoo.com
Biomass Cooking Stoves
http://stoves.bioenergylists.org/node/2102
Eco-fogónJUSTA.pdf 391.81 KB
http://www.bioenergylists.org/es/lorena-a-patsari)
http://www.forcuencas.org/?articulo=1077
http://www.bioenergylists.org/stove_design?page=4

Links hacia sitios que tratan del tema de las estufas ahorradoras de leña:
El sitio del renewable energy policy project, el cual provee mucha información sobre diferentes tipos de estufas ahorradoras
Un articulo sobre como medir el ahorro de leña de una estufa
Una publicación sobre el proceso de mejoramiento de la estufa Lorena de GIRA y la UNAM
El sitio del GERES en cambodia, el cual muestra bien el vinculo entre estufas y cambio climatico
Un manual de principio basicos del Aprovecho Research Center
La estufa
patsari
La ya famosa Lorena
La estufa ONIL
El ecofogon PROLEÑA
La estufa justa
Una publicación de GIRA sobre la evaluación de reducciones en la exposición personal

On the supposed evilness of girls

Source Taken from komplexify.com.
by T. Komplexify, Ph.D. Weizguyy Institute of Smart Axes
Abstract
In this article, we discuss the classic proof that girls are evil. The author will briefly discuss the origins of the problem and review the classic proof. The author then indicates a mathematical flaw in the argument, invalidating the statement. The article concludes with a revised and corrected statement of the result.
I. Introduction
I recently received an email discussing the differences between men and women from various mathematical and engineering points-of-view. Most of it was extremely funny, and sooner or later all shall certainly appear within the mathematico-humorist community, properly researched, and appended with standard references in the literature.
However, one portion of the email included a mathematical “proof” of the fact that girls are evil. This proof is doubtless familiar to many readers, having circulated a few times in mathematicians’ inboxes. However, for those readers unfamiliar with this well-known proof, we present it now.
II. Statement and classical proof of result
Theorem.
Girls are evil.
Proof.
It is axiomic in all cultures that girls require both time and money, and any man with either a deficiency in available “quality time” or “disposable income” knows that this a joint-proportion, whence

Similarly, it is has been proved that “time is money” [1], whence
time = money
Substitution yields

We also know that “money is the root of all evil” [2], whence

Substituting again yields

Squaring on the right-hand side of the equation yields

establishing the result. Q.E.D.

III. Identifying and resolving the flaw
The above “proof,” so-called, is widely known to mathematicians, leading to the widespread belief that girls are evil.
It will therefore come as a surprise to find that the proof above is flawed, and indeed, the result is incorrect. There is a subtle flaw in the above argument that seems to have escaped most diligent readers for quite some time. In the interest of correcting this mis-truth, which has improperly vilified girls as being evil, we present now the correct statement and its proof.

Theorem (Corrected).
Girls are absolute evil.
Proof. Arguing as above allows us to conclude

However, let us more intently examine the consequences of money being the root of all evil.
A moment’s thought shows that it is incorrect to conclude that

To see this, recall that evil is a inherently negative concept [3].
We cannot take square roots of negative quantities in the real world, lest we are will to assume that money is imaginary. (Graduate students in particular may choose to investigate this concept further [4].)
Thus, we are therefore forced to conclude that

Substituting again yields

Squaring on the right-hand side of the equation yields

establishing that girls are absolutely evil. Q.E.D.

IV. Conclusion
We sincerely hope this clears things up.

V. Notes

  1. I. Walker, “Time is money, professor proves,” CNN.com (2002) May 29
  2. The Bible, King James Version (1611), I Timothy, Chapter 6, Verse 10
  3. cf. Q. Smith, “An Atheological Argument from Evil Natural Laws,” (1991) Section 2.
  4. This idea is explored somewhat in K. Marx, Das Kapital (1861).

The research reported in the paper has in part been suppressed by the National Silence Foundation.

Execution

Source: komplexify.com/epsilon
(The electric chair version)

A priest, a lawyer, and an engineer vacationing in Texas, when (for reasons never made clear to them), they are arrested and sentenced to death by electric chair. The day of the execution come, and the three unlucky men are lead up into the execution chamber.
The priest is strapped in first, and for his last words declares “I believe God will intervene on my behalf!” The guards throw the switch and nothing happens, so they assume God has intervened and let the priest go free.
The lawyer is strapped in next, and for his last words declares “I believe in the power of justice to protect the innocent!” The guards throw the switch and nothing happens, so they assume justice has been served and let the lawyer go free.
Finally, the engineer is strapped in, and for his last words declares “Well shoot! You ain’t gonna electrocute nobody if you don’t plug this dang thing in!”

martes 14 de julio de 2009

Quack Medicine

Source

Victorian Prohibitions

Interest in sexual relationships is nothing new and therapeutic devices, sometimes quite bizarre, have always been available (94). Many athletes refrain from sexual activities prior to competition with the belief that strengths and abilities will otherwise be reduced. Masturbation, or onanism, has been associated with the development of weakness, mental illness, neurologic disorders, blindness, and so on for generations. Many ways to "cure" this habit were available in the 19th century (95-97).

90) Dr. Albert Abrams
Dr. Albert Abrams

90) Dr. Albert Abrams
According to the AMA, Albert Abrams was the "dean of twentieth century charlatans". He wrote numerous books and journals and was responsible for the production of a large number of inventive electrical devices, none of which had any medical activity (as stated by scientists of the time). His medical devices were not sold but only rented to practitioners under the stipulation that they not divulge the secrets of contents.
94) Lawson's Vaginal Washer
This bizarre instrument was to be used for female hygiene and sold in the early 20th century. A large irrigating syringe was to be attached and when the handle was turned, the instrument rotated around, acting like a squeegee.

94) Lawson's Vaginal Washer
94) Lawson's Vaginal Washer

95-97) Preventing Onanism
Victorian attitudes regarding sex were very conservative at the end of the 19th century. Masturbation (onanism, self-abuse) and nocturnal emissions (spermatorrhea) were recognized as causes of retardation, weakness, visual impairment, and neurologic disorders. (Imagine the embarrassment of those suffering from those problems at the time!) Several ingenious techniques were available to prevent these "abuses of nature". Robert E. Revere recommended the use of ice water that was circulated over night in his book "Spermatorrhea; Its Causes, Symptoms, and Treatment" (1870). Through a Sears catalogue, one could purchase a spermatorrhea ring which would employ sharp spikes to discourage the user at the appropriate time during sleep. (By the way, this is the only reproduction in my collection, so if you have an original to sell, please let me know!) Another device, similar to a chastity belt, is seen in the 1900 "Catalogue Illustre des Instruments de Chirurgie", by Aubry. Note the small lock on the waistband.
96) Spermatorrhea Ring
96) Spermatorrhea Ring
98-99) Countercurrent Therapy
Discomfort in one place to ease pain in another is the theory behind John Linden's book "Baunscheidtism, or a New Exanthematic Method of Cure" (1874). The resuscitator shown is fairly common though the accompanying brush and the bottle of "John Linden's improved oleum", are fairly rare.
100-101) The Phonendoscope to Hear Disease
Advertised to pick up the different sounds made by various diseased, the phonendoscope was fairly popular at the end of the 19th century. The one here is complete and was produced by the famous French instrument maker, Aubry.

Miscellaneous Contraptions
Counterirritant therapy for pain relief was exemplified by the Resuscitator, which made use of a medical therapeutic approach popular for centuries. It seems that the production of discomfort in one area of the body can relieve pain elsewhere, perhaps by confusing pain recognition centers in the brain. The Resuscitator is a set of fine needles attached to a spring device designed for that purpose (98,99).

99) Resuscitator
99) Resuscitator

History of Female Contraception

By Victoria Nottingham
In the past, a woman used birth control primarily to avoid pregnancy, especially if she already had many children. Before the advent of modern medicine, pregnancy was a dangerous business and many women died during or after childbirth. Much of the birth control methods that were developed were done so by trial and error, and the secrets that were discovered were quietly passed on from woman to woman.
Dances, Amulets, Rituals, and Myths

The earliest documented forms of birth control were dances, rituals, amulets, and myths. By the 2nd-century CE, Greek gynecologist Soranus knew that women were fertile during ovulation and promoted the rhythm method. (Unfortunately, he was incorrect in his assumption that ovulation occurred during menstruation, rather than prior to it.) He also recommended several, less scientific, ways to prevent conception: holding the breath and drawing the body back during sex so the sperm could not penetrate the mouth of the uterus; dislodging the sperm by jumping backwards seven times after intercourse; and sitting down on bent knees in order to provoke sneezing! Similarly, prostitutes in 1st-century BCE are said to have ground their pelvises in a manner that increased their partner's pleasure, with the assumption that the movement simultaneously diverted the sperm away from the womb.
Ancient Roman women wore a leather pouch containing a cat's liver on their left foot during sex to prevent conception. Another preventative was spitting in the mouth of a frog three times. European women were advised to turn the wheel of a grain mill backwards four times at midnight. Others thought that if they inserted a finger into the vagina and "swished it around" after intercourse, it would dislodge or confuse the sperm. Around the same time period, women in other parts of the world wore birth control necklaces or carried amulets to prevent pregnancy.
And in cultures where the moon was believed to be responsible for fertilizing crops, women slept out of the moonlight, so as not to be impregnated by moonbeams. In a similar vein, Papuan Islanders worried that homosexual males might become pregnant. To ensure that this did not occur, they held ceremonies during which they fed them limes to avoid conception.
A more reliable method used in ancient times was continuous breastfeeding, which can prevent ovulation, often until a child was three years old. And a guaranteed method of birth control? Abstinence. In the Middle Ages, some women in Catholic Europe opted for a life in the church. The decision was encouraged, in part, because the vocation meant that money would be given and/or left to the church, initially in the form of a dowry and later, if there was any, as an inheritance.
Spermicides, IUDs, Pessaries, and Douches
In the ancient medical manuscript the Ebers Papyrus (1550 BCE), women were advised to grind dates, acacia tree bark, and honey together into a paste and apply it with seed wool to the vulva. Modern science has shown that, since acacia ferments into lactic acid, a well-known spermicide, this method may have been effective. Other compounds that were smeared around the vagina included olive oil, pomegranate pulp, ginger, and tobacco juice.
Historians believe the Arabs invented intrauterine devices: they placed pebbles in the uteruses of their camels, so they would remain "unhindered" for long trips through the desert. In 1920, German gynecologist Grafenberg developed the first proper IUD for humans, using silkworm gut and silver wire coiled into a ring.
Pessaries (vaginal suppositories or diaphragms) have been recorded as early as 2nd-century BCE. Substances used include elephant or crocodile dung, leaves, and seaweed. Another so-called pessary, which was developed by a man, was a wooden block, similar in size and shape to a doorstop. This method was condemned in the 1930s as an instrument of torture. Other methods have included placing an apricot pit in the uterus, or a product consisting of cocoa butter, boric acid, and tannic acid.
Throughout history, women have also used objects such as sea sponges or soft wool as a sperm barrier, often in combination with lemon juice or vinegar as a spermicide. Half a lemon might be inserted into the vagina. Oriental women used oiled paper to "cap" the cervix, while European women used beeswax.
Soluble pessaries came into the market in the 1800s – these were quinine or cocoa butter tablets that were inserted into the vagina before intercourse. The first brand, Wife's Friend, was created by W.J. Rendell.
Douches have been used throughout history. Since at least the 1600s, French prostitutes used syringes to douche with an acidic liquid, which was thought to be more effective than water.Oral Contraceptives
Oral contraceptives have been available for more than 4,000 years. Women in ancient China drank mercury to prevent pregnancy. Later, women in India imbibed carrot seeds, and an aboriginal group in Eastern Canada drank a tea brewed with beaver testicles.
In Ancient Greece and Rome, the juice of the silphium plant was a popular and effective form of oral contraceptive, which women took once a month. Unfortunately, the siphium plant only grew in one place in Cyrene was extinct by the 1st century CE. In the 2nd century CE, Soranus advised women to drink the water that blacksmiths used to cool hot metals. Urine and animal parts and poisons such as mercury, arsenic, and strychnine were also used as oral contraceptives.
Abortion
Despite continuous debate over the ethics of abortion, it has been practiced throughout the centuries.
Throughout history, midwives doubled as informal family planning counselors, who would help with childbirth as well as with unwanted births. Emmenagogues (which bring on a period) and abortifacients were known as "women's medicines," which were used like the modern morning after pill. In the early 1900s these products were advertised as "removing obstructions" and "preventing irregularities" in the menstrual cycle.
Much of the information that these "wise women" knew has been lost over time – the information was taboo by most religious standards, and history and medical books were written by men, who were not as interested in "women's problems." But because of this lost information about herbal contraceptives, modern accidents have happened. For instance, pregnant women drinking pennyroyal tea may unwittingly miscarry. In one of Aristophanes' Ancient Greek comedies, Hermes advises the hero to "add a dose of pennyroyal" to keep his mistress out of trouble. Other herbs that have been taken to prevent or abort pregnancy include willow leaves, colocynth, and yarrow.
Despite the great technological and medical advancements of the 21st century, looking back at the history of birth control, we still have to ask: How far have we come, really?
Also read History of Male Contraception and It's a Mad, Mad World .