Mostrando entradas con la etiqueta Paz illodo. Mostrar todas las entradas
Mostrando entradas con la etiqueta Paz illodo. Mostrar todas las entradas

sábado, 23 de julio de 2011

ECOLOGY 2

Encyclopedia of Earth: Wildlife


Traditionally, the term wildlife has conjured images of species which are of economic or emotional importance to humans. However wildlife life encompasses a much broader array of life on earth, referring to any undomesticated species, from the European Fire-bellied toad to the Siberian tiger.

As humans have encroached on the natural habitats of the world's wildlife, contaminated the far reaches of earth and hunted or fished some species to extinction, understanding qualities like habitat requirements, lifecycles and nutritional needs for all wildlife species has become a primary focus of many scientists and conservationists.

For many species, their survival depends upon our ability to identify the basic needs for wildlife populations to survive and thrive and act upon that knowledge.

ECOLOGY

Encyclopedia of Earth: Biodiversity

Biodiversity is the variation in living organisms, viewed within a given habitat, ecosystem or in the world as a whole. The concept is usually applied to the species diversity, although the notion of genetic biodiversity is applied to the variation in genes within an individual species. While most people think of rainforests as loci of great biodiversity, biomes such as oceans and grasslands are the likely repositories for even greater variation. Retention of diverse biota is important, since intact ecosystems are thought to be essential for provision of ecosystem services to humans, including maintenance of a diverse foodbank, pollination, clean water, flood control, pest control, waste decomposition, biomass energy resources and climate stability. Biodiversity is presently critical since we live in the era of the Mass Holocene Extinction, a period of species loss caused by man, and unrivaled in rate of species loss. Although the number of total species numbers in the tens of millions, most have not yet even been described. The extinction of a species is almost always related to destruction of habitat or man-made pollution.
http://www.eoearth.org/topics

sábado, 14 de mayo de 2011

Short Jokes

Headmaster: I've had complaints about you, Johnny, from all your teachers. What have you been doing?
Johnny: Nothing, sir.
Headmaster: Exactly.

Mother: "Did you enjoy your first day at school?"
Girl: "First day? Do you mean I have to go back tomorrow?

Patient: Doctor, I have a pain in my eye whenever I drink tea.
Doctor: Take the spoon out of the mug before you drink.

Mary: John says I'm pretty. Andy says I'm ugly. What do you think, Peter?
Peter: I think you're pretty ugly.

A vampire bat came flapping in from the night, covered in fresh blood, and parked himself on the roof of the cave to get some sleep.
Pretty soon all the other bats smelled the blood and began hassling him about where he got it. He told them to go away and let him get some sleep. However, the bats persisted until finally he gave in.
"OK, follow me," he said, and flew out of the cave with hundreds of bats behind him. Down through a valley they went, across a river and into a forest full of trees. Finally he slowed down and all the other bats excitedly milled around him.
"Now, do you see that tree over there?" he asked.
"Yes, yes, yes!" the bats all screamed in a hungry frenzy.
"Good," said the first bat tiredly, "Because I didn't!"
....
Find others in this web page, enjoy!: http://www.funshun.com/jokes





Groupthink, a term coined by social psychologist Irving Janis (1972), occurs when a group makes faulty decisions because group pressures lead to a deterioration of “mental efficiency, reality testing, and moral judgment” . Groups affected by groupthink ignore alternatives and tend to take irrational actions that dehumanize other groups. A group is especially vulnerable to groupthink when its members are similar in background, when the group is insulated from outside opinions, and when there are no clear rules for decision making.


Symptoms of Groupthink

Janis has documented eight symptoms of groupthink:
  1. Illusion of invulnerability –Creates excessive optimism that encourages taking extreme risks.
  2. Collective rationalization – Members discount warnings and do not reconsider their assumptions.
  3. Belief in inherent morality – Members believe in the rightness of their cause and therefore ignore the ethical or moral consequences of their decisions.
  4. Stereotyped views of out-groups – Negative views of “enemy” make effective responses to conflict seem unnecessary.
  5. Direct pressure on dissenters – Members are under pressure not to express arguments against any of the group’s views.
  6. Self-censorship – Doubts and deviations from the perceived group consensus are not expressed.
  7. Illusion of unanimity – The majority view and judgments are assumed to be unanimous.
  8. Self-appointed ‘mindguards’ – Members protect the group and the leader from information that is problematic or contradictory to the group’s cohesiveness, view, and/or decisions.
When the above symptoms exist in a group that is trying to make a decision, there is a reasonable chance that groupthink will happen, although it is not necessarily so. Groupthink occurs when groups are highly cohesive and when they are under considerable pressure to make a quality decision. When pressures for unanimity seem overwhelming, members are less motivated to realistically appraise the alternative courses of action available to them. These group pressures lead to carelessness and irrational thinking since groups experiencing groupthink fail to consider all alternatives and seek to maintain unanimity. Decisions shaped by groupthink have low probability of achieving successful outcomes.
Examples of Groupthink: Past and Present
Examples of groupthink “fiascoes” studied by Janis include US failures to anticipate the attack on Pearl Harbor, the Bay of Pigs invasion, the escalation of Vietnam war, and the ill-fated hostage rescue in Iran. Current examples of groupthink can be found in the decisions of the Bush administration and Congress to pursue an invasion of Iraq based on a policy of “preemptive use of military force against terrorists and rogue nations”. The decision to rush to war in Iraq before a broad-based coalition of allies could be built has placed the US in an unenviable military situation in Iraq that is costly in terms of military deaths and casualties, diplomatic standing in the world, and economically.

Remedies for Groupthink
Decision experts have determined that groupthink may be prevented by adopting some of he following measures:
a) The leader should assign the role of critical evaluator to each member
b) The leader should avoid stating preferences and expectations at the outset
c) Each member of the group should routinely discuss the groups' deliberations with a trusted associate and report back to the group on the associate's reactions
d) One or more experts should be invited to each meeting on a staggered basis. The outside experts should be encouraged to challenge views of the members.
e) At least one articulate and knowledgeable member should be given the role of devil's advocate (to question assumptions and plans)
f) The leader should make sure that a sizeable block of time is set aside to survey warning signals from rivals; leader and group construct alternative scenarios of rivals' intentions.

GROUPTHINK