Tuesday, November 25, 2008

Flood deaths in Brazil rise to 65

Rescue efforts are being stepped up in the southern Brazilian state of Santa Catarina, where floods have left 65 people dead and some 43,000 homeless.

The federal government and other states are sending aid, including helicopters to reach stranded residents.The heavy rainfall of recent days also caused landslides that have destroyed homes and blocked roads in the region.

Eight towns have been cut off by the flood waters while more than 160,000 people are without electricity.

Heavy rains have affected large parts of southern Brazil but Santa Catarina has borne the brunt of the bad weather.

Monday, November 24, 2008

The Aqua Spacecraft

The Aqua spacecraft will circle the Earth in an orbit that ascends across the equator each day at 1:30 p.m. local time and passes very close to the poles, complementing the 10:30 a.m. measurements being made by Terra, the first of the EOS spacecraft, launched in December 1999. The instrument complement on Aqua is designed to provide information on a great many processes and components of the Earth system, including cloud formation, precipitation, water vapor, air temperature, cloud radiative properties, sea surface temperature, surface wind speeds, sea ice concentration and temperature, snow cover, soil moisture, and land and ocean vegetation.

The individual swaths of measurements will be compiled into global images, with global coverage of many variables being obtained as frequently as every two days or, with the help of numerical models, combined every 6 or 12 hours into comprehensive representations of the Earth's atmospheric circulation and surface properties. In combination with measurements from other polar orbiting satellites, Aqua measurements will also provide accurate monthly-mean climate assessments that can be compared with and assimilated into computer model simulations of the Earth's climate.

The Earth Observing System has three major components: the EOS spacecraft, an advanced ground-based computer network for processing, storing, and distributing the collected data (the EOS Data and Information System); and teams of scientists and applications specialists who will study the data and help users in universities, industry, and the public apply it to issues ranging from weather forecasting and climate prediction to agriculture and urban planning.

Tuesday, November 18, 2008


Also called Acne rosacea
Rosacea is a long-term disease that affects your skin and sometimes your eyes. It causes redness and pimples. Rosacea is most common in women and people with fair skin. It usually starts between age 30 and 60.

In most cases, rosacea only affects the face. Symptoms can include
* Frequent redness of the face, or flushing
* Small, red lines under the skin
* Acne
* A swollen nose
* Thick skin, usually on the forehead, chin and cheeks
* Red, dry, itchy eyes and sometimes vision problems

No one knows what causes rosacea. You may be more likely to have it if you blush a lot or if rosacea runs in your family. Rosacea is not dangerous. It can be treated with medications and sometimes surgery.

Tuesday, November 11, 2008

Simple fruit

Simple fruits can be either dry or fleshy, and result from the ripening of a simple or compound ovary with only one pistil. Dry fruits may be either dehiscent (opening to discharge seeds), or indehiscent (not opening to discharge seeds).Types of dry, simple fruits, with examples of each, are:

* achene - (buttercup, strawberry seeds)
* capsule - (Brazil nut)
* caryopsis - (wheat)
* fibrous drupe - (coconut, walnut)
* follicle - (milkweed)
* legume - (pea, bean, peanut)
* loment
* nut - (hazelnut, beech, oak acorn)
* samara - (elm, ash, maple key)
* schizocarp - (carrot)
* silique - (radish)
* silicle - (shepherd's purse)
* utricle - (beet)

Fruits in which part or all of the pericarp (fruit wall) is fleshy at maturity are simple fleshy fruits. Types of fleshy, simple fruits (with examples) are:

* berry - (redcurrant, gooseberry, tomato, avocado)
* stone fruit or drupe (plum, cherry, peach, apricot, olive)
* pome - accessory fruits (apple, pear, rosehip)

Wednesday, November 05, 2008

Obama Builds Up White House Team

Barack Obama has started forming his administration by asking Rahm Emanuel, a former adviser to President Clinton, to be his chief-of-staff.

US President-elect Obama is expected to appoint a new treasury secretary soon.

He has until his inauguration on 20 January to select his senior officials. President Bush has pledged his complete co-operation during the transition.

Mr Obama was elected the first black US president on Tuesday with a resounding win over Republican rival John McCain.

There has been speculation Mr Obama will ask Defence Secretary Robert Gates to remain in his post.

Mr Gates is broadly respected by both parties and would reflect a more bipartisan administration, says the BBC's Jane O'Brien in Washington.

Mr Obama's victory was widely welcomed around the world.

UK Prime Minister Gordon Brown called Tuesday's poll historic and said he and Mr Obama "share many values".

Chinese President Hu Jintao said he looked forward to strengthening dialogue. France's Nicolas Sarkozy said the poll had raised "enormous hope".

Monday, November 03, 2008


Migraine is a neurological syndrome characterized by altered bodily experiences, painful headaches, and nausea. It is a common condition which affects women more frequently than men.

The typical migraine headache is one-sided and pulsating, lasting 4 to 72 hours. Accompanying complaints are nausea and vomiting, and a heightened sensitivity to bright lights (photophobia) and noise (hyperacusis).Approximately one third of people who experience migraines get a preceding aura, in which a patient may sense a strange light or unpleasant smell.

Although the exact cause of migraine remains unknown, the most widespread theory is that it is a disorder of the serotonergic control system. Recently, PET scans have demonstrated the aura to coincide with spreading cortical depression after an episode of greatly increased blood flow (up to 300% higher than baseline). There also appear to be migraine variants that originate in the brainstem and involve dysfunction in calcium and potassium ion transport between cell membranes. Genetic factors may also contribute. Studies on twins show that genes have a 60 to 65% influence on the development of migraine.Fluctuating hormone levels show a relation to migraine in several ways: three quarters of adult migraine patients are female while migraine affects approximately equal numbers of boys and girls before puberty,[citation needed] and migraine is known to disappear during pregnancy in a substantial number of sufferers.

The treatment of migraine begins with simple painkillers for headache and anti-emetics for nausea, and avoidance of triggers if present. Specific anti-migraine drugs can be used to treat migraine. If the condition is severe and frequent enough, preventative drugs might be considered.

The word migraine is French in origin and comes from the Greek hemicrania, as does the Old English term megrim. Literally, hemicrania means "half (the) head".