Wednesday, December 5, 2012

Census of the invisible universe reveals extraordinary high star-formation rates across history of the universe

ScienceDaily (Dec. 4, 2012) ? By combining the observing powers of ESA's Herschel space observatory and the ground-based Keck telescopes, astronomers have characterised hundreds of previously unseen starburst galaxies, revealing extraordinary high star-formation rates across the history of the Universe.

Starburst galaxies give birth to hundreds of solar masses' worth of stars each year in short-lived but intense events.

By comparison, our own Milky Way Galaxy on average produces the equivalent of only one Sun-like star per year.

Starburst galaxies generate so much starlight that they should outshine our Galaxy hundreds to thousands of times over, but the enormous quantities of gas fuelling them also contain vast amounts of dust as a result of the frantic star formation.

The dust absorbs much of the visible light, meaning that many of them look quite insignificant in that part of the spectrum.

However, the dust is warmed by the surrounding hot stars and re-emits the energy at far-infrared wavelengths.

Using ESA's infrared Herschel space observatory, astronomers measured the temperature and brightness of thousands of dusty galaxies. From these, their star-formation rate could be then calculated.

"Starburst galaxies are the brightest galaxies in the Universe and contribute significantly to cosmic star formation, so it's important to study them in detail and understand their properties," says Dr Caitlin Casey of the University of Hawai'i, lead author of the papers discussing the results in the Astrophysical Journal.

"Some of the galaxies found in this new survey have star-formation rates equivalent to the birth of several thousand solar-mass stars per year, constituting some of the brightest infrared galaxies yet discovered."

To provide context to the observations and understand how star formation has changed over the Universe's 13.7 billion year history, the distances to the galaxies were also needed.

With Herschel signposting the way, Dr Casey's team used spectrometers on the twin 10-metre W.M. Keck telescopes on Mauna Kea, Hawai'i, and obtained the redshifts of 767 of the starburst galaxies.

Redshifts provide astronomers with a measure of how long the light from each galaxy has travelled across the Universe, which, in turn, indicates when in cosmic history the light from each galaxy was emitted.

For most of the galaxies it was found that the light has been travelling towards us for 10 billion years or less.

About 5% of the galaxies are at even greater redshifts: their light was emitted when the Universe was only 1-3 billion years old.

"The Herschel data tell us how fiercely and prolifically these galaxies are producing stars," says Seb Oliver from University of Sussex, UK, and Principal Investigator for the HerMES Key Programme, within which the data have been collected.

"Combining this information with the distances provided by the Keck data, we can uncover the contribution of the starburst galaxies to the total amount of stars produced across the history of the Universe."

How such large numbers of starburst galaxies formed during the first few billions of years of the Universe's existence poses a vital problem for galaxy formation and evolution studies.

One leading theory proposes that a collision between two young galaxies could have sparked an intense short-lived phase of star formation.

Another theory speculates that, when the Universe was young, individual galaxies had much more gas available to them to feed from, enabling higher rates of star formation without the need of collisions.

"It's a hotly debated topic that requires details on the shape and rotation of the galaxies before it can be resolved," adds Dr Casey.

"Before Herschel, the largest similar survey of distant starbursts involved only 73 galaxies -- we've improved on that by over a factor of ten in this combined survey with Keck to determine the characteristics of this important galaxy population," adds G?ran Pilbratt, ESA's Herschel project scientist.

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Story Source:

The above story is reprinted from materials provided by European Space Agency (ESA).

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal References:

  1. C. M. Casey, S. Berta, M. B?thermin, J. Bock, C. Bridge, D. Burgarella, E. Chapin, S. C. Chapman, D. L. Clements, A. Conley, C. J. Conselice, A. Cooray, D. Farrah, E. Hatziminaoglou, R. J. Ivison, E. Le Floc'h, D. Lutz, G. Magdis, B. Magnelli, S. J. Oliver, M. J. Page, F. Pozzi, D. Rigopoulou, L. Riguccini, I. G. Roseboom, D. B. Sanders, D. Scott, N. Seymour, I. Valtchanov, J. D. Vieira, M. Viero, J. Wardlow. A Population of z>2 Far-Infrared Herschel-SPIRE selected Starbursts. Astrophysical Journal, 2012
  2. C. M. Casey, S. Berta, M. B?thermin, J. Bock, C. Bridge, J. Budynkiewicz, D. Burgarella, E. Chapin, S. C. Chapman, D. L. Clements, A. Conley, C. J. Conselice, A. Cooray, D. Farrah, E. Hatziminaoglou, R. J. Ivison, E. Le Floc'h, D. Lutz, G. Magdis, B. Magnelli, S. J. Oliver, M. J. Page, F. Pozzi, D. Rigopoulou, L. Riguccini, I. G. Roseboom, D. B. Sanders, D. Scott, N. Seymour, I. Valtchanov, J. D. Vieira, M. Viero, J. Wardlow. A Redshift Survey of Herschel Far-Infrared Selected Starbursts and Implications for Obscured Star Formation. Astrophysical Journal, 2012

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/toWrxd_6iKU/121204112018.htm

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UN calls on Israel to open nuclear facilities

(AP) ? The U.N. General Assembly has overwhelmingly approved a resolution calling on Israel to quickly open its nuclear program for inspection and backing a high-level conference to ban nuclear weapons from the Middle East which was just canceled.

All the Arab nations and Iran had planned to attend the conference in mid-December in Helsinki, Finland, but the United States announced on Nov. 23 that it wouldn't take place, citing political turmoil in the region and Iran's defiant stance on nonproliferation. Iran and some Arab nations countered that the real reason for the cancellation was Israel's refusal to attend.

The resolution, approved Monday by a vote of 174-6 with 6 abstentions, calls on Israel to join the Nuclear Nonproliferation Treaty "without further delay" and open its nuclear facilities to inspection by the International Atomic Energy Agency. Those voting "no" were Israel, the U.S., Canada, Marshall Islands, Micronesia and Palau.

Resolutions adopted by the 193-member General Assembly are not legally binding but they do reflect world opinion and carry moral and political weight.

Israel refuses to confirm or deny it has nuclear bombs though it is widely believed to have a nuclear arsenal. It has refused to join the Nuclear Nonproliferation Treaty, or NPT, along with three nuclear weapon states ? India, Pakistan and North Korea.

The Arab proposal to create a weapons-of-mass-destruction-free zone in the Mideast, and to pressure Israel to give up its undeclared arsenal of perhaps 80 nuclear warheads, was endorsed at an NPT conference in 1995 but never acted on. In 2010, the 189 parties to the 1970 treaty called for convening a conference in 2012 on the establishment of a WMD-free zone in the Middle East.

The resolution, which was approved by the assembly's disarmament committee before the conference was cancelled, noted the decision to hold it "with satisfaction."

But Israel has long said there first must be a Mideast peace agreement before the establishment of a Mideast zone free of weapons of mass destruction. The region's Muslim nations argue that Israel's undeclared nuclear arsenal presents the greatest threat to peace in the region.

The Israeli government had no immediate comment on Monday's General Assembly vote.

Last week, the General Assembly upgraded the Palestinians to that of a nonmember observer state, endorsing an independent Palestinian state in the West Bank, east Jerusalem, and the Gaza Strip.

Just before Monday's vote, Iranian diplomat Khodadad Seifi told the assembly "the truth is that the Israeli regime is the only party which rejected to conditions for a conference." He called for "strong pressure on that regime to participate in the conference without any preconditions."

Israeli diplomat Isi Yanouka said his country has continuously pointed to the danger of nuclear proliferation in the Mideast, singling out Iran and Syria by name.

"All these cases challenge Israel's security and cast a dark shadow at the prospect of embarking on a meaningful regional security process," he said.

"The fact that the sponsors include in this anti-Israeli resolution language referring to the 2012 conference proves above all the ill-intent of the Arab states with regard to this conference," Yanouka said.

Syrian diplomat Abdullah Hallak told the assembly his government was angry that the conference wasn't going to take place because of "the whim of just one party, a party with nuclear warheads."

"We call on the international community to put pressure on Israel to accept the NPT, get rid of its arsenal and delivery systems, in order to allow for peace and stability in our region," he said.

The conference's main sponsors are the U.S., Russia and Britain. British Foreign Office Minister Alistair Burt has said it is being postponed, not cancelled.

While the United States voted against the resolution, it voted in favor of two paragraphs in it that were put to separate votes. Both support universal adherence to the NPT, and call on those countries that aren't parties to ratify it "at the earliest date." The only "no" votes on those paragraphs were Israel and India.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/cae69a7523db45408eeb2b3a98c0c9c5/Article_2012-12-04-UN-Nuclear-Mideast/id-6326058668484a77ab8b475f83855c8d

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Risky Business: Life Insurance for Climbers ? Beyond the Edge

Climber descending Khan Tengri's saddle on the West Ridge route, Kyrgyzstan; Photograph by Steve Graepel

With contributions from Doug Colwell

Nothing shouts middle age quite like shopping for life insurance. But there I was, answering questions about my height, weight, smoking ? and then came the dreaded question: ?Have you climbed in the last three years???

I quickly try to run the numbers. ?In the last three years??? Stalling, I ask for clarification. ?Can you define climbing??

Clearly I wasn?t selling my low-risk persona and a week later I was sent a questionnaire to parse out my extracurricular vitae?which raised a whole string of red prayer flags.

A few calls later put me in touch with Doug Colwell from HD Insurance. I entered his office I find myself face-to-face with an oil painting of K2?s Abruzzi Ridge ? clearly this was my guy. Doug manages risk during the week, but plays in it on the weekend. An active climber, he?s set over 150 new technical routes in Idaho. As a sitting board member for the American Alpine Club (AAC), he?s volunteered countless hours helping the AAC navigate member insurance options. Doug has experience with folks like us?responsible individuals who carefully manage risk. I sat down with Doug to get a top-down perspective of life insurance for those pursuing the vertical life.

Base Cost

Climbers tend to have dirt-bag proclivities; so you first might ask if you even need insurance. Fair enough, not all climbers have the same needs. If you don?t have family responsibilities, the AAC might have something for you. Included with its $75/year member fee, the AAC provides all members with a $10,000 rescue plan: a $5,000 reimbursement package toward domestic (U.S. only) rescue services and another $5,000 toward worldwide rescue and evacuation services, pulling you (or what?s left of you) off the mountain and back home. It?s a cheap and responsible option for the young or un-tethered.

Got a family? Fancy yourself as the next Alex Honnold? Keep reading.

Skeletons in the Closet

Life insurance is purchased to cover the needs of your loved ones after you pass. But it?s also a contract between you and the underwriter. And like all contracts, it?s steeped in stipulations and legalese and should be entered cautiously.

As part of the contract negotiation process, expect the underwriter to have a call-center conduct a phone interview. They?ll run you through a gamut of questions. It?s all good until you trip a line in their code. It can be smoking, past medical issues, family medical history, or a handful of statistically deemed ?risky behaviors? like skydiving, SCUBA, or climbing. All the sudden you?ll find yourself rapping off a tower of babbling details, exposing things you haven?t even revealed to your mother. It?s in these nuanced questions that you need to stay at the sharp edge of the discussion.

Consider it like a first date. Do roll out the dirt, talk about your exs? Resoundingly no! It?s a don?t, ask-don?t tell conversation. Same here?this isn?t the time to volunteer that epic in The Park where you dropped your stove and half your rack off The Diamond in the dead of winter. Your partner backed off but you soloed through the night. Great story, but not the one your insurance suitor wants to hear.

Ultimately, underwriters are in the business of helping people. All State realizes that we aren?t all saints; they insure real people with a little chalk under their fingers. But their actuaries have run the numbers to determine when risk management favors good business over risky business.

In preparation, consider these questions before you pickup the phone:

  • When did you last climb? Probably the most important question is when did you last tie in to a rope? If your hardware has been gathering patina since K2 was in theaters, you?re not likely to get off the couch and take it up again. But if your picks are still bloodied from slaying November rime on Dragontail in the North Cascades ? well, I?d expect you?d have some further questions. Three years appears to be the magic number.
  • What grade do you climb at? So you still climb. No worries, they have a policy for that. But here?s where you need to start doing damage control. Answer what may seem painfully honest to your beer buddies. I mean, do you really still climb at 5.11c?
  • What type of climbing do you do? Beyond a rope and harness, top roping at the gym and leading mixed routes at Hyalite have little in common. Believe it or not, actuaries know this, too! Again, be honest. If you haven?t swung an axe lately, don?t go there. But if you are currently flicking steel into smears, expect that it?s going to cost you.
  • What?s the length of your climbs (afternoon?days?weeks)? Are you a weekend warrior or are you frequently on extended holiday in Hindu Kush? The longer you hang it out there, the more you expose yourself to risk.
  • Do you have any professional training? While that belay training at the Y probably doesn?t cut it, did you take a course through a guiding service? Better yet, do you climb with guides? Put any of that knowledge you?ve paid for in your corner.
  • How safe are you? If you do get the climbing questionnaire, use this as an opportunity to identify yourself as a safe, low-risk candidate. Share a dialogue about how you protect your belay, how you regularly clean your gear, how you prematurely retire gear before it sees signs of ware and tear.

Honesty is the Best Policy

A key component to the process is being honest ? with yourself and with your agent. If you haven?t picked up an axe or roped up in 3+ years and have no existing plans to do so in the next 2 or so years, you?re all good. If your policy is in place and you get that call from your Camp 4 squatting years to head off to the Valley ? you?re still covered. Things happen, plans change, they (mostly) understand. The trouble starts if you are already saddled up and indicate otherwise, which would be considered a breach of contract.

A word of advice? Don?t try and game the system! You are entering a legal contract. And because it?s about money, insurance companies are certain to check in from time-to-time?particularly in that posthumous time before funds are paid out. In the least, not answering honestly will void your contract. Worst case, it could leave your loved ones high and dry.

Find and Advocate

Doug left me with this. ?Work with someone who can get a proper picture of you as an individual, assess you as a person, learn your true risk and match you with the best-suited underwriter?. Like most things associated with climbing, hasty decisions don?t pay off. Only here, your biggest risk is likely being unnecessarily tabled at a much higher rate, costing you hundreds, if not thousands of dollars a year.

Source: http://adventureblog.nationalgeographic.com/2012/12/04/risky-business-life-insurance-for-climbers/

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Tuesday, December 4, 2012

This Jawbone Jambox Is Your Brick-Sized-Beach-Speaker Deal of the Day

In the two years since the Jawbox Jambone came out, other options have hit the market with varying new features and improved specs. But although some of the new challengers are legit, the Jambox remains the original Bluetooth speaker to find the right mix of attractive design, ease of use, and quality. Brian Lam over at the Wirecutter has a soft spot in his heart for this speaker, and Wired's Mat Honan likes its big brother's sound quality. More »


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/SYa04XpQ3do/this-jawbone-jambox-is-your-brick+sized+beach+speaker-deal-of-the-day

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Astronomy and Space Sticker Book | Education & Reference ...

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Video: AK-47s vs tanks: Syria?s rebels fight on despite odds

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Source: http://video.msnbc.msn.com/nightly-news/50059046/

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Monday, December 3, 2012

gregra's Site - Kanai: Biological Science


B.Ed OPTIONAL COURSE

BIOLOGICAL SCIENCE ? I

UNIT I Place, Goals and Objectives of Biology

Biology in the school curriculum ? its claims for inclusion ? Interdisciplinary approaches in the school curriculum ? Various branches related to Life Science.

Goals and objectives of teaching Biology with reference to Bloom?s taxonomy- Cognitive, Affective and Psychomotor Domains. Aims of teaching Biology at different levels ? Primary, Secondary and Higher Secondary.

Biology in the school curriculum

??????????? Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines. Among the most important topics are five unifying principles that can be said to be the fundamental axioms of modern biology:

  1. Cells are the basic unit of life
  2. New species and inherited traits are the product of evolution
  3. Genes are the basic unit of heredity
  4. An organism regulates its internal environment to maintain a stable and constant condition
  5. Living organisms consume and transform energy.
??????????? Sub disciplines of biology are recognized on the basis of the scale at which organisms are studied and the methods used to study them: biochemistry examines the rudimentary chemistry of life; molecular biology studies the complex interactions of systems of biological molecules; cellular biology examines the basic building block of all life, the cell; physiology examines the physical and chemical functions of the tissues, organs, and organ systems of an organism; and ecology examines how various organisms interact and associate with their environment.

What is science?

??????????? The word "science" probably brings to mind many different pictures: a fat textbook, white lab coats and microscopes, an astronomer peering through a telescope, a naturalist in the rainforest, Einstein's equations scribbled on a chalkboard, the launch of the space shuttle, bubbling beakers ?. All of those images reflect some aspect of science, but none of them provides a full picture because science has so many facets:

  • Science is both a body of knowledge and a process. In school, science may sometimes seem like a collection of isolated and static facts listed in a textbook, but that's only a small part of the story. Just as importantly, science is also a process of discovery that allows us to link isolated facts into coherent and comprehensive understandings of the natural world.
  • Science is exciting. Science is a way of discovering what's in the universe and how those things work today, how they worked in the past, and how they are likely to work in the future. Scientists are motivated by the thrill of seeing or figuring out something that no one has before.
  • Science is useful. The knowledge generated by science is powerful and reliable. It can be used to develop new technologies, treat diseases, and deal with many other sorts of problems.
  • Science is ongoing. Science is continually refining and expanding our knowledge of the universe, and as it does, it leads to new questions for future investigation. Science will never be "finished."
  • Science is a global human endeavor. People all over the world participate in the process of science. And you can too!

Science is complex and multi-faceted, but the most important characteristics of science are straightforward:

  • Science focuses exclusively on the natural world, and does not deal with supernatural explanations.
  • Science is a way of learning about what is in the natural world, how the natural world works, and how the natural world got to be the way it is. It is not simply a collection of facts; rather it is a path to understanding.
  • Scientists work in many different ways, but all science relies on testing ideas by figuring out what expectations are generated by an idea and making observations to find out whether those expectations hold true.
  • Accepted scientific ideas are reliable because they have been subjected to rigorous testing, but as new evidence is acquired and new perspectives emerge these ideas can be revised.
  • Science is a community endeavor. It relies on a system of checks and balances, which helps ensure that science moves in the direction of greater accuracy and understanding. This system is facilitated by diversity within the scientific community, which offers a broad range of perspectives on scientific ideas.

??????????? Too many, science may seem like an arcane, ivory-towered institution ? but that impression is based on a misunderstanding of science. In fact:

  • Science affects your life everyday in all sorts of different ways.
  • Science can be fun and is accessible to everyone.
  • You can apply an understanding of how science works to your everyday life.
  • Anyone can become a scientist ? of the amateur or professional variety.

Definitions of Science

????????? sci?ence

1.????? A branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws: the mathematical sciences.

2. Systematic knowledge of the physical or material world gained through observation ?? ????????????????????????????????????????????and experimentation.

4. systematized knowledge in general.

5. Knowledge, as of facts or principles; knowledge gained by systematic study.

6. A particular branch of knowledge.

7. Skill, especially reflecting a precise application of facts or principles; proficiency.

Definitions by goal and process

?2. The organized body of knowledge that is derived from such observations and that can be verified or tested by further investigation.

?3. any specific branch of this general body of knowledge, such as biology, physics, geology, or astronomy.

Academic Press Dictionary of Science & Technology

??????????? Science is an intellectual activity carried on by humans that is designed to discover information about the natural world in which humans live and to discover the ways in which this information can be organized into meaningful patterns. A primary aim of science is to collect facts (data). An ultimate purpose of science is to discern the order that exists between and amongst the various facts.

??????????? Science involves more than the gaining of knowledge. It is the systematic and organized inquiry into the natural world and its phenomena. Science is about gaining a deeper and often useful understanding of the world.

The Nature of Normal Science

??????????? Normal science is the practice of gaining knowledge by using some paradigm. It therefore has a perspective, common rules, facts, and problems. Its task is to solidify, reify, and articulate the paradigm; quantify its predictions, extend it to new areas, and to develop the technology needed. It rejects the approbations of the lay. It does not attempt to answer all problems. It uses facts considered revealing to solve problems considered acute by the paradigm. It is to articulate accepted phenomena. Problems must be challenging but not hopeless. Frequently the paradigm and its rules are tacit, they cannot be articulated. The adequacy of a paradigm is judged by peers not lay.

??????????? Normal science is the finding of previously unpredicted phenomena and showing how that phenomenon is explainable with the existing paradigm. Finding unexplainable phenomena is not science; anyone can be capable of not explaining something. Brain damage helps enormously. Normal science does not produce new phenomena; it articulates those that the paradigm supplies. Extending the paradigm (showing how the paradigm explains previously unexplainable events) is mopping up and is where most scientists spend their lives.

??????????? A paradigm gains status because it handles problems that practitioners feel are important - not because it handles all problems.

??????????? 1. Empirical work to articulate paradigm or theory. Determinants of physical constants / quantitative laws / determination of way to apply paradigm to new situation.

??????????? 2. Facts without intrinsic interest which can be compared to predictions from the paradigm.

??????????? 3. Class of facts that the paradigm has shown to be revealing of nature. To desert the paradigm is to cease practicing the science it defines. The task is to explain current problems with rules such that the majority of past findings are consistent, somewhat like a judge trying to be consistent with precedent, or trying to minimize sum of squared differences when determining a regression line.

Fact

? ???????? ?1. ?Something that actually exists; reality; truth: Your fears have no basis in fact.

??????????? ?2. Something known to exist or to have happened: Space travel is now a fact.

3. A truth known by actual experience or observation; something known to be true: ???Scientists gather facts about plant growth.

4. Something said to be true or supposed to have happened: The facts given by the witness are highly questionable.

5. Law often, facts an actual or alleged event or circumstance, as distinguished from its legal effect or consequence. Compare question of fact, question of law.

There are four types of fact. The first type of fact cannot be proved by the experiments as we wish. We have to see this fact when it happens. The second type of fact can be seen and shown at any time. The third type of fact is the generalization i.e. one fact is associating with another fact. The fourth type is a theory but it is treated as fact because of the evidences to prove the theory.

BIOLOGY AS A SCIENCE

??????????? When we say science we know pretty well that includes not only physics and chemistry but also Biology. We can give three reasons to prove that Biology is also a science. They are:

1.????? Biology possesses the characters of other branches of science like practical, experiments, data and utility for the life. We know that all the three branches of science possess all these qualities. Biology also gives the same benefits to the society as the other branches.

2.????? Biology gives a complete and notable knowledge like other branches of science. We know that physics deals with instruments and equipments, chemistry deals with chemical substances and their combinations and biology deals with living organisms. So it gives a complete notable knowledge about living organisms.

3.????? Biology gives extra training in the scientific method. We know that scientific method is a method followed by scientists to develop science. While physics and chemistry gives training to the pupil in this method, Biology is expected to give extra training in this method. This is because it deals with living organisms and they have to face complex problems in their life. The pupils are expected to adopt the scientific method in order to find how the living organisms overcome the complex problems. So they get extra training in the scientific method by studying Biology. Because of these three reasons Biology is considered as science along with other branches of science. ?

GOALS AND OBJECTIVES OF TEACHING BIOLOGY WITH REFERENCE TO BLOOM?S TAXONOMY

Benjamin Bloom's Taxonomy of Learning Domains - Cognitive, Affective, Psychomotor Domains - design and evaluation toolkit for training and learning

??????????? Bloom's Taxonomy, (in full: 'Bloom's Taxonomy of Learning Domains', or strictly speaking: Bloom's 'Taxonomy Of Educational Objectives') was initially (the first part) published in 1956 under the leadership of American academic and educational expert Dr Benjamin S Bloom. 'Bloom's Taxonomy' was originally created in and for an academic context, (the development commencing in 1948), when Benjamin Bloom chaired a committee of educational psychologists, based in American education, whose aim was to develop a system of categories of learning behaviour to assist in the design and assessment of educational learning. Bloom's Taxonomy has since been expanded over many years by Bloom and other contributors (notably Anderson and Krathwhol as recently as 2001, whose theories extend Bloom's work to far more complex levels than are explained here, and which are more relevant to the field of academic education than to corporate training and development).

??????????? Most corporate trainers and HR professionals, coaches and teachers, will benefit significantly by simply understanding the basics of Bloom's Taxonomy, as featured below. (If you want to know more, there is a vast amount of?related reading and references, listed at the end of this summary explanation.)

Bloom's Taxonomy was primarily created for academic education; however it is relevant to all types of learning.

??????????? Interestingly, at the outset, Bloom believed that education should focus on 'mastery' of subjects and the promotion of higher forms of thinking, rather than a utilitarian approach to simply transferring facts. Bloom demonstrated decades ago that most teaching tended to be focused on fact-transfer and information recall - the lowest level of training - rather than true meaningful personal development, and this remains a central challenge for educators and trainers in modern times. Much corporate training is also limited to non-participative, unfeeling knowledge-transfer, (all those stultifying boring PowerPoint presentations...), which is reason alone to consider the breadth and depth approach exemplified in Bloom's model.

You might find it helpful now to see the?Bloom Taxonomy overview. Did you realize there were all these potential dimensions to training and learning?

??????????? Benjamin S Bloom (1913-99) attained degrees at Pennsylvania State University in 1935. He joined the Department of Education at the University of Chicago in 1940 and attained a PhD in Education in 1942, during which time he specialized in examining. Here he met his mentor Ralph Tyler with whom he first began to develop his ideas for developing a system (or 'taxonomy') of specifications to enable educational training and learning objectives to be planned and measured properly - improving the effectiveness of developing 'mastery' instead of simply transferring facts for mindless recall. Bloom continued to develop the Learning Taxonomy model through the 1960's, and was appointed Charles H Swift Distinguished Service Professor at Chicago in 1970. He served as adviser on education to several overseas governments including of Israel and India.

??????????? Bloom's (and his colleagues') initial attention was focused on the?'Cognitive Domain', which was the first published part of Bloom's Taxonomy, featured in the publication: 'Taxonomy Of Educational Objectives: Handbook 1, The Cognitive Domain' (Bloom, Engelhart, Furst, Hill, Krathwohl, 1956).

??????????? The 'Taxonomy of Educational Objectives: Handbook II, The Affective Domain' (Bloom, Masia, Krathwohl) as the title implies, deals with the detail of the second domain, the?'Affective Domain', and was published in 1964.

??????????? Various people suggested detail for the third?'Psychomotor Domain', which explains why this domain detail varies in different representations of the complete Bloom Taxonomy. The three most popularly referenced versions of the Psychomotor Domain seem to be those of???? RH Dave?(1967/70),?EJ Simpson (1966/72), and?AJ Harrow?(1972).

??????????? As such 'Bloom's Taxonomy' describes the three-domain structure, within which the detail may vary, especially for the third domain.

??????????? Bloom's Taxonomy has therefore since 1956 provided a basis for ideas which have been used (and developed) around the world by academics, educators, teachers and trainers, for the preparation of learning evaluation materials, and also provided the platform for the complete 'Bloom's Taxonomy' (including the detail for the third 'Psychomotor Domain') as we see it today. Collectively these concepts which make up the whole Bloom Taxonomy continue to be useful and very relevant to the planning and design of: school, college and university education, adult and corporate training courses, teaching and lesson plans, and learning materials; they also serve as a template for the evaluation of: training, teaching, learning and development, within every aspect of education and industry.

Training or learning design and evaluation need not cover all aspects of the Taxonomy - just make sure there is coverage of the aspects that are appropriate.

??????????? As such, if in doubt about your training aims - check what's possible, and perhaps required, by referring to Bloom's Taxonomy.

Explanation of bloom's taxonomy

??????????? First, don't be put off by the language or the apparent complexity of Bloom's Taxonomy - at this basic level it's a relatively simple and logical model.

??????????? Taxonomy?means 'a set of classification principles', or 'structure', and?Domain?simply means 'category'. Bloom and his colleagues were academics, looking at learning as a behavioural science, and writing for other academics, which is why they never called it 'Bloom's Learning Structure', which would perhaps have made more sense to people in the business world. (Interestingly this example of the use of technical language provides a helpful lesson in learning itself, namely, if you want to get an idea across to people, you should try to use language that your audience will easily recognize and understand.)

??????????? Bloom's Taxonomy underpins the classical 'Knowledge, Attitude, Skills' structure of learning method and evaluation, and aside from the even simpler?Kirkpatrick learning evaluation model, Bloom's Taxonomy of Learning Domains remains the most widely used system of its kind in education particularly, and also industry and corporate training. It's easy to see why, because it is such a simple, clear and effective model, both for explanation and application of learning objectives, teaching and training methods, and measurement of learning outcomes.

??????????? Bloom's Taxonomy provides an excellent structure for planning, designing, assessing and evaluating training and learning effectiveness. The model also serves as a sort of?checklist, by which you can ensure that training is planned to deliver all the necessary development for students, trainees or learners, and a template by which you can assess the validity and coverage of any existing training, be it a course, a curriculum, or an entire training and development programme for a large organization.

??????????? It is fascinating that Bloom's Taxonomy model (1956/64) and?Kirkpatrick's learning evaluation model (1959) remain classical reference models and tools into the 21st century. This is because concepts such as Bloom's Taxonomy, Kirkpatrick's model,?Maslow's Hierarchy of Needs,?Mcgregor's XY Theory, The?SWOT analysis?model, and?Berne's Transactional Analysis theory, to name a few other examples, are timeless, and as such will always be relevant to the understanding and development of people and organizations. Bloom?s taxonomy definitions

??????????? Bloom's Taxonomy model is in three parts, or 'overlapping domains'. Again, Bloom used rather academic language, but the meanings are simple to understand:

  1. Cognitive domain?(intellectual capability, i.e.,?knowledge, or?'think')
  2. Affective domain?(feelings, emotions and behaviour, i.e.,?attitude, or?'feel')
  3. Psychomotor domain?(manual and physical skills, i.e.,?skills, or?'do')

??????????? This has given rise to the obvious short-hand variations on the theme which summaries the three domains; for example, Skills-Knowledge-Attitude, KAS, Do-Think-Feel, etc.

??????????? Various people have since built on Bloom's work, notably in the third domain, the 'psychomotor' or skills, which Bloom originally identified in a broad sense, but which he never fully detailed. This was apparently because Bloom and his colleagues felt that the academic environment held insufficient expertise to analyze and create a suitable reliable structure for the physical ability 'Psychomotor' domain. While this might seem strange, such caution is not uncommon among expert and highly specialized academics - they strive for accuracy as well as innovation. In Bloom's case it is as well that he left a few gaps for others to complete the detail; the model seems to have benefited from having several different contributors fill in the detail over the years, such as Anderson, Krathwhol, Masia, Simpson, Harrow and Dave (these last three having each developed versions of the third 'Psychomotor' domain).

??????????? In each of the three domains Bloom's Taxonomy is based on the premise that the categories are ordered in degree of difficulty.?An important premise of Bloom's Taxonomy is that each category (or 'level') must be mastered before progressing to the next. As such the categories within each domain are levels of learning development, and these levels increase in difficulty.

??????????? The simple matrix structure enables a checklist or template to be constructed for the design of learning programmes, training courses, lesson plans, etc. Effective learning - especially in organizations, where training is to be converted into organizational results - should arguably cover all the levels of each of the domains, where relevant to the situation and the learner.

??????????? The learner should benefit from development of knowledge and intellect (Cognitive Domain); attitude and beliefs (Affective Domain); and the ability to put physical and bodily skills into effect - to act (Psychomotor Domain).

??????????? Here's a really simple adapted 'at-a-glance' representation of Bloom's Taxonomy. The definitions are intended to be simple modern day language, to assist explanation and understanding. This simple overview can help you (and others) to understand and explain the taxonomy. Refer back to it when considering and getting to grips with the detailed structures - this overview helps to clarify and distinguish the levels.

??????????? For the more precise original Bloom Taxonomy terminology and definitions see the more detailed domain structures beneath this at-a-glance model. It's helpful at this point to consider also the ?conscious competence' learning stages model, which provides a useful perspective for all three domains, and the concept of developing competence by stages in sequence.

Cognitive

Affective

Psychomotor

knowledge

attitude

skills

1. Recall data

1.Receive? (awareness)

1. Imitation (copy)

2. Understand

2. Respond (react)

2. Manipulation (follow instructions)

3. Apply (use)

3. Value (understand and act)

3. Develop Precision

4.Analyse (structure/elements)

4. Organize personal value system

4.Articulation (combine, integrate related skills)

5.Synthesize (create/build)

5. Internalize value system (adopt behaviour)?

5.Naturalization (automate, become expert)

6. Evaluate (assess, judge in relational terms)

N.B. In the Cognitive Domain, levels 5 and 6, Synthesis and Evaluation, were subsequently inverted by Anderson and Krathwhol in 2001. Anderson and Krathwhol also developed a complex two-dimensional extension of the Bloom Taxonomy, which is not explained here. If you want to learn more about the bleeding edge of academic educational learning and evaluation there is a list of further references below. For most mortals in teaching and training what's on this page is probably enough to make a start, and a big difference.

??????????????? Note also that the Psychomotor Domain featured above is based on the domain detail established by RH Dave (who was a student of Bloom) in 1967 (conference paper) and 1970 (book). The Dave model is the simplest and generally easiest to apply in the corporate development environment. Alternative Psychomotor Domains structures have been suggested by others, notably?Harrow and Simpson's models detailed below. I urge you explore the?Simpson?and?Harrow?Psychomotor Domain alternatives - especially for the development of children and young people, and for developing skills in adults that take people out of their comfort zones. This is because the Simpson and Harrow models offer different emotional perspectives and advantages, which are useful for certain learning situations, and which do not appear so obviously in the structure of the Dave model.

??????????? Bloom's Taxonomy in more detailed structure follows, with more formal terminology and definitions. Refer back to the?Bloom Taxonomy overview?any time you need to refresh or clarify your perception of the model. It is normal to find that the extra detail can initially cloud the basic structure - which is actually quite simple - so it's helpful to keep the simple overview to hand.

?Bloom?s taxonomy learning domains - detailed structures

Bloom's Taxonomy 1956 Cognitive Domain is as follows. An adjusted model was produced by Anderson and Krathwhol in 2001 in which the levels five and six (synthesis and evaluation) were inverted (reference: Anderson & Krathwhol, A Taxonomy for Learning, Teaching, and Assessing: A Revision of Bloom's Taxonomy of Educational Objectives, 2001). This is why you will see different versions of this Cognitive Domain model. Debate continues as to the order of levels five and six, which is interesting given that Bloom's Taxonomy states that the levels must be mastered in order.

??????????? In my humble opinion it's possible to argue either case (Synthesis then Evaluation, or vice-versa) depending on the circumstances and the precise criteria stated or represented in the levels concerned, plus the extent of 'creative thinking' and 'strategic authority' attributed to or expected at the 'Synthesis' level. In short - pick the order which suits your situation.

cognitive domain

?level

category or 'level'

behaviour descriptions

examples of activity to be trained, or demonstration and evidence to be measured

'key words' (verbs which describe the activity to be trained or measured at each level)

1

Knowledge

recall or recognise information

multiple-choice test, recount facts or statistics, recall a process, rules, definitions; quote law or procedure

arrange, define, describe, label, list, memorise, recognise, relate, reproduce, select, state

2

Comprehension

understand meaning, re-state data in one's own words, interpret, extrapolate, translate

explain or interpret meaning from a given scenario or statement, suggest treatment, reaction or solution to given problem, create examples or metaphors

explain, reiterate, reword, critique, classify, summarise, illustrate, translate, review, report, discuss, re-write, estimate, interpret, theories, paraphrase, reference, example

3

Application

use or apply knowledge, put theory into practice, use knowledge in response to real circumstances

put a theory into practical effect, demonstrate, solve a problem, manage an activity

use, apply, discover, manage, execute, solve, produce, implement, construct, change, prepare, conduct, perform, react, respond, role-play

4

Analysis

interpret elements, organizational principles, structure, construction, internal relationships; quality, reliability of individual components

identify constituent parts and functions of a process or concept, or de-construct a methodology or process, making qualitative assessment of elements, relationships, values and effects; measure requirements or needs

analyze, break down, catalogue, compare, quantify, measure, test, examine, experiment, relate, graph, diagram, plot, extrapolate, value, divide

5

Synthesis (create/build)

develop?new unique structures, systems, models, approaches, ideas; creative thinking, operations

develop plans or procedures, design solutions, integrate methods, resources, ideas, parts; create teams or new approaches, write protocols or contingencies

develop, plan, build, create, design, organize, revise, formulate, propose, establish, assemble, integrate, re-arrange, modify

6

Evaluation

assess effectiveness of whole concepts, in relation to values, outputs, efficacy, viability; critical thinking, strategic comparison and review; judgement relating to external criteria

review strategic options or plans in terms of efficacy, return on investment or cost-effectiveness, practicability; assess sustainability; perform a?SWOT analysis in relation to alternatives; produce a financial justification for a proposition or venture, calculate the effects of a plan or strategy; perform a detailed and costed risk analysis with recommendations and justifications

review, justify, assess, present a case for, defend, report on, investigate, direct, appraise, argue, project-manage

??????????? Based on the 'Taxonomy Of Educational Objectives: Handbook 1, The Cognitive Domain' (Bloom, Engelhart, Furst, Hill, Krathwhol) 1956. This table is adapted and reproduced with permission from Allyn & Bacon, Boston USA, being the publishers and copyright owners of 'Taxonomy Of Educational Objectives' (Bloom et al 1956).

Note that levels 5 and 6, Synthesis and Evaluation, were subsequently inverted by Anderson and Krathwhol in 2001, on which point:

??????????? The question of the order of Synthesis and Evaluation is dependent upon the extent of strategic expectation and authority that is built into each, which depends on your situation. Hence it is possible to make a case for Bloom's original order shown above, or Anderson and Krathwhol version of 2001 (which simply inverts levels 5 and 6).

??????????? The above version is the original, and according to the examples and assumptions presented in the above matrix, is perfectly appropriate and logical. I also personally believe the above order to be appropriate for?corporate and industrial training and development?if?'Evaluation'?is taken to represent?executive or strategic assessment and decision-making, which is effectively at the pinnacle of the corporate intellect-set.

??????????? The inversion of Synthesis and Evaluation carries a risk unless it is properly qualified. This is because the highest skill level absolutely must involve?strategic evaluation; effective management - especially of large activities or organizations - relies on strategic evaluation. And clearly,?strategic evaluation is by implication included in the 'Evaluation' category.

??????????? I would also argue that in order to evaluate properly and strategically, we need first to have learned and experienced the execution of the strategies (ie, to have completed the synthesis step) that we intend to evaluate.

??????????? However, you should feel free to invert levels 5 and 6 if warranted by your own particular circumstances, particularly if your interpretation of 'Evaluation' is non-strategic, and not linked to decision-making. Changing the order of the levels is warranted if local circumstances alter the degree of difficulty. Remember, the taxonomy is based in the premise that the degree of difficulty increases through the levels - people need to learn to walk before they can run - it's that simple. So, if your situation causes 'Synthesis' to be more challenging than 'Evaluation', then change the order of the levels accordingly (i.e., invert 5 and 6 like Anderson and Krathwhol did), so that you train people in the correct order.

??????????? Bloom's Taxonomy second domain, the Affective Domain, was detailed by Bloom, Krathwhol and Masia in 1964 (Taxonomy of Educational Objectives: Volume II, The Affective Domain. Bloom, Krathwhol and Masia.) Bloom's theory advocates this structure and sequence for developing attitude - also now commonly expressed in the modern field of personal development as 'beliefs'. Again, as with the other domains, the Affective Domain detail provides a framework for teaching, training, assessing and evaluating the effectiveness of training and lesson design and delivery, and also the retention by and affect upon the learner or trainee.

affective domain

?level

category or 'level'

behaviour descriptions

examples of experience, or demonstration and evidence to be measured

'key words' (verbs which describe the activity to be trained or measured at each level)

1

Receive

open to experience, willing to hear

listen to teacher or trainer, take interest in session or learning experience, take notes, turn up, make time for learning experience, participate passively

ask, listen, focus, attend, take part, discuss, acknowledge, hear, be open to, retain, follow, concentrate, read, do, feel

2

Respond

react and participate actively

participate actively in group discussion, active participation in activity, interest in outcomes, enthusiasm for action, question and probe ideas, suggest interpretation

react, respond, seek clarification, interpret, clarify, provide other references and examples, contribute, question, present, cite, become animated or excited, help team, write, perform

3

Value

attach values and express personal opinions

decide worth and relevance of ideas, experiences; accept or commit to particular stance or action

argue, challenge, debate, refute, confront, jus

Source: http://kanaimastar.blogspot.com/2012/12/biological-science.html

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