Ferns typically produce large diploid sporophytes with rhizomes, roots and leaves; and on fertile leaves called sporangium, spores are produced. The spores are released and germinate to produce short, thin gametophytes that are typically heart shaped, small and green in color. The gametophytes or thallus, produce both motile sperm in the antheridia and egg cells in separate archegonia. After rains or when dew deposits a film of water, the motile sperm are splashed away from the antheridia, which are normally produce on the top side of the thallus, and swim in the film of water to the antheridia where they fertilize the egg. To promote out crossing or cross fertilization the sperm are released before the eggs are receptive of the sperm, making it more likely that the sperm will fertilize the eggs of diffrent thallus. A zygote is formed after fertilization, which grows into a new sporophytic plant. The condition of having separate sporephyte and gametophyte plants is call alternation of generations. Other plants with similar reproductive means include the Psilotum, Lycopodium, Selaginella and Equisetum.
Monday, August 04, 2008
Reproduction in plants
Ferns typically produce large diploid sporophytes with rhizomes, roots and leaves; and on fertile leaves called sporangium, spores are produced. The spores are released and germinate to produce short, thin gametophytes that are typically heart shaped, small and green in color. The gametophytes or thallus, produce both motile sperm in the antheridia and egg cells in separate archegonia. After rains or when dew deposits a film of water, the motile sperm are splashed away from the antheridia, which are normally produce on the top side of the thallus, and swim in the film of water to the antheridia where they fertilize the egg. To promote out crossing or cross fertilization the sperm are released before the eggs are receptive of the sperm, making it more likely that the sperm will fertilize the eggs of diffrent thallus. A zygote is formed after fertilization, which grows into a new sporophytic plant. The condition of having separate sporephyte and gametophyte plants is call alternation of generations. Other plants with similar reproductive means include the Psilotum, Lycopodium, Selaginella and Equisetum.
Monday, July 28, 2008
Prediction for a stable cultural and social future
The status of a human society rests on the productivity of food production. Deevey reported on the growth of the number of humans. Deevey also reported on the productivity of food production, noting that productivity changes very little for stable societies, but increases during transitions. When productivity and especially food productivity can no longer be increased, Bloomfield has proposed that man will have achieved a stable automated society. Space is also assumed to allow for the continued growth of the human population, as well as provide a solution to the current pollution problem by providing limitless energy from solar satellite power stations.
Monday, July 21, 2008
Bronze Age
Tuesday, July 15, 2008
Phenotype
Despite its seemingly straightforward definition, the concept of the phenotype has some hidden subtleties. First, most of the molecules and structures coded by the genetic material are not visible in the appearance of an organism, yet they are observable (for example by Western blotting) and are thus part of the phenotype. Human blood groups are an example. So, by extension, the term phenotype must include characteristics that can be made visible by some technical procedure. Another extension adds behaviour to the phenotype since behaviours are also affected by both genotypic and environmental factors.
Second, the phenotype is not simply a product of the genotype, but is influenced by the environment to a greater or lesser extent (see also phenotypic plasticity). And, further, if the genotype is defined narrowly, then it must be remembered that not all heredity is carried by the nucleus. For example, mitochondria transmit their own DNA directly, not via the nucleus, though they divide in unison with the nucleus.
The phenotype is composed of traits or characteristics . Some phenotypes are controlled entirely by the individual's genes. Others are controlled by genes but are significantly affected by extragenetic or environmental factors. Almost all humans inherit the capacity to speak and understand language, but which language they learn is entirely an environmental matter.
Sunday, July 06, 2008
Duel
The Romanticism depiction of medieval duels was based on either a pretext of defence of honor, usually accompanied by a trusted representative (who might themselves fight), often in contravention of the duelling conventions, or as a matter of challenge of the champion which developed out of the desire of one party (the challenger) to redress a perceived insult to his or his sovereign's honor. The goal of the honourable duel was often not so much to kill the opponent as to gain "satisfaction", that is, to restore one's honor by demonstrating a willingness to risk one's life for it.
Duels may be distinguished from trials by combat, in that duels were not used to determine guilt or innocence, nor were they official procedures. Indeed, from early 19th century duels were often illegal in Europe, though in most societies where duelling was socially accepted, participants in a fair duel were not prosecuted, or if they were, were not convicted. Only gentlemen were considered to have honor, and therefore only they were qualified to duel. If a gentleman was insulted by a person of lower class, he would not duel him, but would beat him with a cane, riding crop, a whip or have his servants do so.[citation needed] Duelling is now illegal in all but a few countries around the world.[citation needed]
Sunday, June 29, 2008
Albinism Treatment of the symptoms
Surgical treatment
For the most part, treatment of the eye conditions consists of visual rehabilitation.[citation needed] Surgery is possible on the ocular muscles to decrease nystagmus, strabismus and common refractive errors like astigmatism. Strabismus surgery may improve the appearance of the eyes.[citation needed] Nystagmus-damping surgery can also be performed, to reduce the "shaking" of the eyes back and forth.The effectiveness of all these procedures varies greatly and depends on individual circumstances. More importantly, since surgery will not restore a normal RPE or foveae, surgery will not provide fine binocular vision.[citation needed] In the case of esotropia (the "crossed eyes" form of strabismus), surgery may help vision by expanding the visual field Vision aids.
Glasses and other vision aids, large-print materials and closed captioning, as well as bright but angled reading lights, can help individuals with albinism, even though their vision cannot be corrected completely. Some albinistic people do well using bifocals (with a strong reading lens), prescription reading glasses, and/or hand-held devices such as magnifiers or monoculars.
Contact lenses may be colored to block light transmission through the iris. Some use bioptics, glasses which have small telescopes mounted on, in, or behind their regular lenses, so that they can look through either the regular lens or the telescope. Newer designs of bioptics use smaller light-weight lenses. Some US states allow the use of bioptic telescopes for driving motor vehiclesAlthough still disputed among the experts,[who?] many ophthalmologists recommend the use of glasses from early childhood onward to allow the eyes the best development possible.
Optometrists or ophthalmologists who are experienced in working with low vision patients can recommend various optical aids. Some low-vision clinics provide these aids on trial loan, with instruction in their use.
Sun protection
It is vital that people with albinism use sunscreen when exposed to sunlight to prevent premature skin aging or skin cancer. This poses a problem for those who cannot afford sunscreen, especially in regions with high exposure to sunlight, as in Africa.
Use of sunglasses and hats with wide brims can make the glare outside bearable. Other things that can help people with albinism are avoiding sudden changes of the lighting situation (switching the light on in complete darkness), using dimmable switches and adding tint to car windows or blinds to normal windows. Lights should be yellowish rather than blue[citation needed] and not point towards the usual position of a person with albinism
Sunday, June 22, 2008
Sporophyte
The sporophyte produces spores (hence the name), by meiosis. These meiospores develop into a gametophyte. Both the spores and the resulting gametophyte are haploid, meaning they only have one set of homologous chromosomes. The mature gametophyte produces male or female gametes (or both) by mitosis. The fusion of male and female gametes produces a diploid zygote which develops into a new sporophyte. This cycle is known as alternation of generations or alternation of phases.
n the normal course of events, the zygote and sporophyte will have a full double set of chromosomes again. An exception is when a diploid and haploid gamete fuse, resulting in a triploid sporophyte, which will usually be sterile, as dividing three sets of chromosomes into two halves causes complications.
Bryophytes (mosses, liverworts and hornworts) have a dominant gametophyte stage on which the adult sporophyte is dependent on the gametophyte for nutrition. The embryo of the sporophyte develops from the zygote within the female sex organ or archegonium, and in its early development is therefore nurtured by the gametophyte. Because this embryo-nurturing feature of the life cycle is common to all land plants they are known collectively as the Embryophytes.
Most algae have dominant gametophyte generations, but in some species the gametophytes and sporophytes are morphologically similar (isomorphic). An independent sporophyte is the dominant form in all clubmosses, horsetails, ferns, gymnosperms, and angiosperms (flowering plants) that have survived to the present day. Early land plants had sporophytes that produced identical spores (isosporous or homosporous) but the ancestors of the gymnosperms evolved complex heterosporous life cycles in which the spores producing male and female gametophytes were of different sizes, the female megaspores tending to be larger, and fewer in number, than the male microspores.
During the Devonian period several plant groups independently evolved heterospory and subsequently the habit of endospory, in which single megaspores were retained within the sporangia of the parent sporophyte, instead of being freely liberated into the environment as in ancestral exosporous plants. These endosporic megaspores contained within them a miniature multicellular female gametophyte complete with female sex organs or archegonia containing oocytes which were fertilised by free-swimming sperm produced by windborne miniatuarised male gametophytes in the form of pre-pollen. The resulting zygote developed into the next sporophyte generation while still retained within the pre-ovule, the single large female meiospore or megaspore contained in the modified sporangium or nucellus of the parent sporophyte. The evolution of heterospory and endospory were among the earliest steps in the evolution of seeds of the kind produced by gymnosperms and angiosperms today.
Sunday, June 15, 2008
Field-programmable gate array
A hierarchy of programmable interconnects allows logic blocks to be interconnected as needed by the system designer, somewhat like a one-chip programmable breadboard. Logic blocks and interconnects can be programmed by the customer or designer, after the FPGA is manufactured, to implement any logical function—hence the name "field-programmable".
FPGAs are usually slower than their application-specific integrated circuit (ASIC) counterparts, cannot handle as complex a design, and draw more power (for any given semiconductor process). But their advantages include a shorter time to market, ability to re-program in the field to fix bugs, and lower non-recurring engineering costs. Vendors can sell cheaper, less flexible versions of their FPGAs which cannot be modified after the design is committed. The designs are developed on regular FPGAs and then migrated into a fixed version that more resembles an ASIC.
"Complex Programmable Logic Device" (CPLDs) are an alternative for simpler designs. They also retain their programming over powerdowns.
To configure ("program") an FPGA or CPLD you specify how you want the chip to work with a logic circuit diagram or a source code using a hardware description language (HDL). The HDL form might be easier to work with when handling large structures because it's possible to just specify them numerically rather than having to draw every piece by hand. On the other hand, schematic entry might allow for a more tight specification of what you want.
Going from schematic/HDL source files to actual configuration: The source files are fed to a software suite from the FPGA/CPLD vendor that through different steps will produce a file. This file is then transferred to the FPGA/CPLD via a serial interface (JTAG) interface or to external memory device like an EEPROM.
Sunday, June 08, 2008
Ultra Music Festival
From 2001 to 2005, UMF was held outdoors in Bayfront Park, Miami. The first two UMFs (1999, & 2000) were actually held on South Beach in Miami Beach, however UMF attendance exceeded the possible beach permits and was subsequently moved to the venue of Bayfront Park. The top DJs and artists of the evening perform in the amphitheater designed to hold thousands of attendees. There is a second main stage (called the 'Sound stage') and 10 other specialized music areas scattered throughout the park featuring Drum and Bass, House, Techno, Electro, Breakbeats, Trance, and other various styles of electronic music.
In 2005 the concert was so popular that it sold out. With the festival growing so big, in 2006 the Miami event had been moved to an even bigger venue, Bicentennial Park, next door to its past home. In 2007, with Winter Music Conference in full swing, Ultra Music Festival had its first 2-Day Event held at Bicentennial Park with a record breaking 50,000+ electronic music fans. Ultra Music Festival celebrated its 10th anniversary on Friday, March 28th and Saturday March 29th, 2008, where an announcement was made that the festival had set a new City of Miami record for the number of tickets sold at a single event.
Ultra Music Festival, in association with Ultra Records, produces an event in New York City's Central Park called ULTRA:NY, which also sold out in 2005. The success has brought Ultra:NY back for a second year.
Monday, June 02, 2008
Human circulatory system
Wednesday, May 28, 2008
The library as an intermediary
On exokernel based systems, the library is especially important as an intermediary. On exokernels, OSes shield user applications from the very low level kernel API, and provide abstractions and resource management
Tuesday, May 27, 2008
Understanding the Context
* Some activities take place in real-time while others allow for a delayed reply.
* Discussion areas may be public or exist for a particular group of people.
* Information can either be broadcast or targeted at a particular user.
As the technology develops, and users and providers become more proficient, the boundaries between the different Internet services are blurred. For example, email is used in chat rooms, web pages include discussion areas and newsgroups can have files attached.
Each Internet service has its own educational value, risks, and recommended ways of dealing with problems, and these are detailed in the following pages. They are not exhaustive and many apply across Internet services. Schools should consider the sum of the advice in these guidelines across all areas.
Thursday, May 22, 2008
Overview of the Click Thinking Pack
At the same time, the media tends to focus on the rare occasions when use of the Internet causes distress. The Scottish Executive believes that young people need to be protected and informed; and that those responsible for them, whether teachers, parents or other careers, should be aware of the issues involved.
Previous Scottish Executive Education Department (SEED) publications in this area have dealt with the need to protect pupils from misuse of computers (Information Ethics) and to understand copyright implications (Copyright and Ethics in a Digital Age).
This booklet focuses on personal safety and wellbeing. It attempts to clarify potential risks and to empower Internet users in schools so that they can keep themselves safe. Those who manage Scottish schools, and all teachers, whether responsible for a primary class or for teaching a subject, will find policy guidelines and background information which will prepare our pupils to take their safe and well-earned place in the Digital Age.
Much of the advice in these guidelines will be relevant to other Local Authority staff responsible for overseeing young people's use of the Internet (e.g. managers and staff in community education centers, residential homes for young people, libraries and other settings). These groups should take account of the messages about personal safety, and put into place the recommendations suitable for their setting.
Wednesday, May 07, 2008
BACK TO SCHOOL SAFETY ALERT:
CPSC Document #5002
Each year about 800 bicyclists are killed and more than half a million are treated in hospital emergency rooms. In recent years, almost two-thirds of the deaths and one-third of the injuries involved head and face injury. About one-half the injuries to children under the age of 10 involved the head or face. Helmets may reduce the risk of head injury to bicyclists by as much as 85 percent. Yet, only about 50 percent of bicyclists wear helmets.
The purpose of a helmet is to absorb the energy of an impact to minimize or prevent a head injury. Crushable, expanded polystyrene foam generally is used for this purpose.
A bicycle helmet should have a snug but comfortable fit on the rider's head. Some helmets are available with several different thicknesses of internal padding to custom fit the helmet to the user. If a parent is buying a helmet for a child, the CPSC recommends that the child accompany the parent so that the helmet can be tested for a good fit.
For a helmet to provide protection during impact, it must have a chin strap and buckle that will stay securely fastened. No combination of twisting or pulling should remove the helmet from the head or loosen the buckle on the strap. Children should be instructed to always wear the helmet level on the forehead, not tilted back. The chin strap should be adjusted correctly and firmly buckled.
Helmets manufactured after March 1999, are required by federal law to meet the CPSC standard. When purchasing a helmet, consumers are urged to examine the helmet and accompanying instructions and safety literature carefully. Consumers should also look for a label stating conformance with the CPSC standard.
Bicyclists should avoid riding at night. If you must ride at night, install and use front and rear lights on the bicycle and wear clothing with reflective tape or markings. These precautions are in addition to the reflectors that the CPSC requires to be on the front, rear, pedals, and wheels of bicycles.
Many bicycle-car crashes can be avoided by applying the rules of the road and by increasing attentiveness of cyclists and motorists. Bicyclists have a legal right to share the road, but they are often not noticed in traffic. Drivers should always keep an eye out for bicyclists, especially when turning, merging, changing lanes, or entering intersections.
Monday, April 28, 2008
All-Terrain Vehicle Safety
An estimated 740 people died in 2003* in incidents associated with ATVs. In addition, in 2004* there were an estimated 136,100 emergency room treated injuries associated with ATVs. About a third of all deaths and injuries involved victims under 16 years old. CPSC also reported that ridership has continued to grow, with 6.2 million 4-wheeled ATVs in use in 2003*.
The major ATV manufacturers agreed in Consent Decrees in 1988 and in subsequent voluntary action plans that they would not manufacture three-wheel ATVs; they would place engine size restrictions on ATVs sold for use by children under 16; and they would offer driver-training programs.
Children and young people under the age of 16 should not ride adult ATVs.
All ATV users should take a hands-on safety training course.
Always wear a helmet and safety gear such as boots and gloves while on an ATV.
Never drive an ATV on paved roads.
Never drive while under the influence of drugs or alcohol.
Never drive a youth or single-rider adult ATV with a passenger, and never ride these vehicles as a passenger.
There are some ATVs that are designed for two riders. Passengers on tandem ATVs should be at least 12 years old.
Monday, April 21, 2008
J-Hook Shaped Stake style (Anchor Types)
Monday, April 14, 2008
Anchoring/Securing/Counterweighing Guidelines
Monday, April 07, 2008
Soccer Goal Injuries and Deaths
There are approximately 225,000 to 500,000 soccer goals in the United States. Many of these soccer goals are unsafe because they are unstable and are either unanchored or not properly anchored or counter-balanced. These movable soccer goals pose an unnecessary risk of tip over to children who climb on goals (or nets) or hang from the crossbar.
The CPSC knows of four deaths in 1990 alone and at least 21 deaths during the past 16 years (1979-1994) associated with movable soccer goals. In addition, an estimated 120 injuries involving falling goals were treated each year in U.S. hospital emergency rooms during the period 1989 through 1993. Many of the serious incidents occurred when the soccer goals tipped over onto the victim. Almost all of the goals involved in these tip over appeared to be home-made by high school shop classes, custodial members, or local welders, not professionally manufactured. These home-made goals are often very heavy and unstable.
The majority of movable soccer goals are constructed of metal, typically weighing 150-500 pounds. The serious injuries and deaths are a result of blunt force trauma to the head, neck, chest, and limbs of the victims. In most cases this occurred when the goal tipped or was accidentally tipped onto the victim. In one case an 8-year-old child was fatally injured when the movable soccer goal he was climbing tipped over and struck him on the head. In another case, a 20-year-old male died from a massive head trauma when he pulled a goal down on himself while attempting to do chin-ups. In a third case, while attempting to tighten a net to its goal post, the victim’s father lifted the back base of the goal causing it to tip over striking his 3-year-old child on the head, causing a fatal injury.
High winds can also cause movable soccer goals to fall over. For example, a 9-year-old was fatally injured when a goal was tipped over by a gust of wind. In another incident, a 19-year-old goalie suffered stress fractures to both legs when the soccer goal was blown on top of her.
Sunday, March 30, 2008
B.C.-Canada Place officially closes doors
Over the course of the 2006 Olympic and Paralympic Winter Games, British Columbia-Canada Place drew more than 100,000 visitors and journalists. These visitors were able to experience first hand the province’s culture, heritage, natural beauty and bustling cities. Also, more than 80 British Columbia businesses were able to connect with an international audience and showcase some of B.C.’s best products and services.
B.C.-Canada Place will be a legacy to the people of Torino. The official transfer took place in a ceremony yesterday, with Torino Mayor Sergio Chiamparino accepting a ceremonial key to the building.
“This generous gift from British Columbia will be a constant reminder of our friends in Canada and the celebrations that took place in our city during the 2006 Winter Games,” says Mayor Chiamparino. “We are honored to have this permanent B.C. presence in our city.”
Monday, March 24, 2008
Kent Kickin' Mini-Scooters
Kent has received four reports of the handles coming out, resulting in four children suffering injuries, including broken arms, a broken wrist, bruises, abrasions and a cracked tooth.
These are Kickin' Mini-Scooters made of chrome-plated steel. A vertical decal on the steering column reads "KICKIN' MINI SCOOTER." The scooter's black plastic platform measures about 15 inches long, and it has 4-inch translucent in-line style wheels. "KENT" and "MADE IN CHINA" are written on the lower part of the steering column. The scooters were sold with black backpacks embroidered in white with the word "Kickin."
Toys R us stores nationwide sold the Kent scooters from May 2000 through September 2000 for about $60.
Consumers should stop riding these Kent scooters immediately, and call Kent International to receive a free replacement handlebar with pins to secure the handlebars. For more information, call Kent International at (800) 451-KENT (5368) between 8 a.m. and 5 p.m. ET Monday through Friday.
Kent has sold other models to Toys R Us such as the Street Craze, the Street Racer and Scoot that are NOT part of this recall. Scooters that Kent sold to Wal Mart, Meijer's, Target and AAFES are also NOT part of this recall.
Monday, March 17, 2008
Trampoline Safety Alert
* Colliding with another person on the trampoline.
* Landing improperly while jumping or doing stunts on the trampoline.
* Falling or jumping off the trampoline.
* Falling on the trampoline springs or frame.
Most of the trampolines associated with injuries were at private homes.
Here are the steps you can take to help prevent serious trampoline injuries, especially paralysis, fractures, sprains, and bruises:
* Allow only one person on the trampoline at a time.
* Do not attempt or allow somersaults because landing on the head or neck can cause paralysis.
* Do not use the trampoline without shock-absorbing pads that completely cover its springs, hooks, and frame.
* Place the trampoline away from structures, trees, and other play areas.
* No child under 6 years of age should use a full-size trampoline. Do not use a ladder with the trampoline because it provides unsupervised access by small children.
* Always supervise children who use a trampoline.
* Trampoline enclosures can help prevent injuries from falls off trampolines.
Monday, March 10, 2008
Accumulator
In a computer CPU, an accumulator is a register in which intermediary arithmetic and logic results are stored. Without a register like an accumulator, it would be necessary to write the result of each calculation (addition, multiplication, shift, etc.) to main memory, possibly only to be read right back again for use in the next operation. Access to main memory is slower than access to a register like the accumulator because the technology used for the huge main memory is slower (but cheaper) than that used for a register.
The canonical example for accumulator use is adding a list of numbers. The accumulator is initially set to zero, then each number in spin is added to the value in the accumulator. Only when all numbers have been added is the result seized in the accumulator written to main memory or to another, non-accumulator, CPU register.
Monday, February 25, 2008
Roll-to-roll processing,
Sunday, February 17, 2008
Tissue engineering
Wednesday, November 14, 2007
A general view on Computer
Computers can be very versatile. In actual fact, they are universal information processing machines. As said by the Church-Turing thesis, a computer with a certain minimum threshold capability is in principle competent of performing the tasks of any other computer, from those of a personal digital supporter to a supercomputer. So, the same computer designs have been modified for tasks from processing company payrolls to controlling industrial robots. Modern electronic computers also have great speed and capability for information processing compared to earlier designs, and they have become exponentially very powerful over the years (it is a phenomenon known as Moore's Law).
Computers are obtainable in many physical forms. The original computers were the size of a large room, and such great computing facilities still exist for specialized scientific computation - supercomputers - and for the business deal processing requirements of large companies, in general called mainframes. Smaller computers for personage use, called personal computers, and their handy equivalent, the notebook computer, are ubiquitous information-processing and communication tools and are perhaps what most non-experts imagine of as "a computer". However, the most ordinary form of computer in use today is the embedded computer, small computers used to manage another device. The Embedded computers control machines from the fighter planes to digital cameras.
Sunday, November 04, 2007
Box
An elaborate wooden box Boxes are extremely variable receptacles. When no shape is described, a typical rectangular box may be expected. Nevertheless, a box may have a horizontal cross section that is square, elongated, round or oval; sloped or domed top surfaces, or non-vertical sides. A box normally may be opened by raising, sliding or removing the lid, which may be hinged and/or secure by a catch, clasp, or lock. Whatever its shape or purpose or the material of which it is formed, it is the direct descendant of the chest, one of the most ancient articles of marital furniture. Its uses are innumerable, and the name, preceded by a qualifying adjective, has been given to many objects of imaginative or antiquarian interest. Objects are often placed inside boxes, for a multiplicity of reasons - see storage.
Sunday, October 28, 2007
The real facts about Neptune
Neptune's blue color is mainly the result of absorption of red light by methane in the atmosphere but there is a number of additional as-yet-unidentified chromophore which gives the clouds their rich blue tint. Like Jupiter and Saturn, Neptune has an inner heat source -- it radiates more than, twice as much energy as it receives from the Sun.
Neptune also has rings. Earth-based observations showed just faint arcs rather than complete rings, but Voyager 2's images showed them to be entire rings with bright clumps. One of the rings looks to have a curious twisted structure (right). Like Uranus and Jupiter, Neptune's rings are extremely dark but their composition is unknown.
Neptune's rings have been noted names: the outermost is Adams (which contains three important arcs now named Liberty, Equality and Fraternity), next is an unnamed ring co-orbital with Galatea, then Leverrier (whose outer extensions are called Lassell and Arago), and lastly the faint but broad Galle. Neptune's magnetic field is, like Uranus', oddly oriented and most likely generated by motions of conductive material (probably water) in its middle layers.
Friday, October 26, 2007
The real facts about Pluto
Pluto is safe in a 3:2 resonance with Neptune; i.e. Pluto's orbital period is just 1.5 times longer than Neptune's. Its orbital inclination is as well much higher than the other planets'. Thus though it looks that Pluto's orbit crosses Neptune's, it actually doesn't and they will never collide. Pluto's composition is unidentified, but its density (about 2 gm/cm3) indicates that it is almost certainly a mixture of 70% rock and 30% water ice much like Triton. The bright areas of the surface appear to be covered with ices of nitrogen with lesser amounts of (solid) methane, ethane and carbon monoxide. The composition of the darker areas of Pluto's surface is unidentified but may be due to primordial organic material or photochemical reactions driven by cosmic rays.
Little is recognized about Pluto's atmosphere, but it perhaps consists primarily of nitrogen with some carbon monoxide and methane. It is very tenuous, the surface pressure being only some microbars. Pluto's atmosphere can exist as a gas only when Pluto is near its perihelion; for the greater part of Pluto's long year, the atmospheric gases are frozen into ice. Close to perihelion, it is likely that some of the atmosphere escapes to space possibly even interacting with Charon. NASA mission planners want to appear at Pluto while the atmosphere is still unfrozen.
Tuesday, October 16, 2007
Butter chicken
It is a dish prepared by marinating a chicken overnight in a yoghurt and spice mixture usually together with garam masala, ginger, lemon or lime, pepper, coriander, cumin, turmeric, chilli, methi and garlic. It is in various ways like to chicken tikka masala. The chicken is then roasted or dry as a bone.
Monday, October 08, 2007
Fresh skin-care tips
Fresh fruit and vegetables are especially high in acids. If you apply anything to your skin and encounter a burning sensation, take out immediately and apply cool water.If you are in the care of a dermatologist and on acne medications, please consult with your physician first.
Sunday, September 23, 2007
Traffic Claming
Thursday, September 13, 2007
Asian Paradise Flycatcher
The Asian glory Flycatcher breeds from Turkestan to Manchuria. It is wandering, wintering in tropical Asia. There are resident populations further south, for example in southern India and Sri Lanka, so both visiting migrants and the in the vicinity reproduction subspecies take place in these areas in winter.
This species is typically originated in thick forests and other well-wooded habitats. Three or four eggs are laid in a cup shell in a tree.
The adult male Asian Paradise Flycatcher is about 20 cm long, but the long tail streamers double this. It has a black crested head, stale joke upperparts and pale grey underparts.
By their second year, the males of the wandering Indian race T. p. paradisi begin to obtain white feathers. By the third year, the male plumage is totally white, other than the black head. Males of the sedentary Sri Lankan race T. p. ceylonensis are forever stale joke.
The female of all races resembles the stale joke male, but has a grey throat, minor peak and lacks the tail streamers.
Wednesday, September 05, 2007
Salad
Tuesday, August 21, 2007
Mainframes
The term originated during the early 1970s with the introduction of smaller, fewer complex computers such as the DEC PDP-8 and PDP-11 series, which became known as minicomputers or just minis. The industry/users then coined the term "mainframe" to describe bigger, earlier types (previously known simply as "computers").
Monday, August 13, 2007
Lighthouse of Alexandria
With a height variously estimated at between 115 and 150 meters (383 - 450 ft) it was among the tallest man-made structures on Earth for many centuries, and was recognized as one of the Seven Wonders of the World by Antipater of Sidon. It was the third tallest building after the two Great Pyramids (of Khufu and Khafra) for its whole life. Some scientists approximate a much taller height exceeding 180 metres that would make the tower the tallest building up to the 14th century.
Monday, July 30, 2007
Traffic light
Sunday, July 22, 2007
Vegetable
Sunday, July 15, 2007
Asia
Chiefly in the eastern and northern hemispheres, Asia is conventionally defined as part of the landmass of Africa-Eurasia – with the western portion of the latter occupied by Europe – lying east of the Suez Canal, east of the Ural Mountains, and south of the Caucasus Mountains and the Caspian and Black Seas. It is surrounded to the east by the
Given its size and diversity,
Monday, July 09, 2007
Management information system
Management Information Systems (MIS) is a general name for the educational discipline casing the application of people, technologies, and procedures —together called information systems — to solve business problems. MIS are distinctive from normal information systems in that they are used to evaluate other information systems applied in operational activities in the organization. Rationally, the term is commonly used to refer to the group of information management methods attached to the automation or support of human decision making, e.g. Decision Support Systems, Expert systems, and Executive information system
Thursday, July 05, 2007
Accumulator
The canonical example for accumulator use is adding a list of numbers. The accumulator is initially set to zero, then each number in spin is added to the value in the accumulator. Only when all numbers have been added is the result seized in the accumulator written to main memory or to another, non-accumulator, CPU register.
Sunday, July 01, 2007
Shark
Wednesday, June 27, 2007
Superscalar
History
Seymour Cray's CDC 6600 from 1965 is often mentioned as the first superscalar plan. The Intel i960CA and the AMD 29000-series 29050 microprocessors were the first commercial single-chip superscalar microprocessors. RISC CPUs like these brought the superscalar idea to micro computers because the RISC design results in a simple core, allowing straightforward instruction send off and the inclusion of multiple functional units on a single CPU in the inhibited design rules of the time. This was the reason that RISC designs were faster than CISC designs through the 1980s and into the 1990s.
Sunday, June 24, 2007
Neem oil
Neem oil is typically light to dark brown, bitter and has a rather strong odour that is said to join the odours of peanut and garlic. It comprises mainly triglycerides and large amounts of triterpenoid compounds, which are in charge for the bitter taste. It is hydrophobic in nature and in order to emulisify it in water for application purposes, it must be formulated with suitable surfactants.
Neem oil also contains steroids and a plethora of triterpenoids of which Azadirachtin is the most well known and studied. The Azadirachtin content of Neem Oil varies from 300ppm to over 2000ppm depending on the quality of the neem seeds compressed.
Tuesday, June 19, 2007
Swan
Swans typically mate for life, though "divorce" does sometimes occur, mainly following nesting failure. The number of eggs in each clutch is between 3–8.
The word is derived from Old English swan, akin to German Schwan, in turn derived from Indo-European root *swen (to sound, to sing), whence Latin derives sonus (sound). Young swans are known as cygnets, from the Latin word for swan, cygnus. An adult male is a cob, from Middle English cobbe; an adult female is a pen .
Friday, June 15, 2007
Tide
Monday, June 11, 2007
Shrimp fishery
A number of the larger species, including the Atlantic white shrimp (Penaeus setiferus), are caught commercially and used for food. Recipes utilizing shrimp form part of the cuisine of many cultures: examples include jambalaya, okonomiyaki, poon choi, bagoong, Kerala and scampi.
Preparing shrimp for consumption usually involves removing the shell, tail, and "sand vein". As with other seafood, shrimp is high in calcium, protein and low in food energy.
Shrimp and prawns are versatile ingredients, and are often used as an accompaniment to fried rice. Common methods of preparation comprise baking, boiling and frying. As stated in the movie Forrest Gump
Thursday, June 07, 2007
Rose
Rose hips are sometimes eaten, mostly for their vitamin C content. They are typically pressed and filtered to make rose-hip syrup, as the fine hairs surrounding the seeds are unpleasant to eat. They can also be used to create herbal tea, jam, jelly and marmalade.
Friday, June 01, 2007
Industrial metal
It is difficult to distinguish many industrial metal artists and industrial rock because both genres leave much room for ingenuity and creativity. By convention, all industrial metal artists may be more vaguely described as industrial rock as well, but not all industrial rock artists are properly described as industrial metal. The general rule of thumb is the speed and "crunchiness" of the guitars. If the guitars are fast and heavily distorted, it is likely industrial metal.
Monday, May 28, 2007
Genetics
Mendel observed that inheritance is basically a discrete process with specific traits that are inherited in an independant manner. These basic units of inheritance is now known as "genes". In the cells of organisms, genes exist actually in the structure of the molecule DNA and the information genes contain is used to create and control the components of cells. Although genetics plays a large role in determining the appearance and behavior of organisms, it is the interaction of genetics with the environment an organism experiences that determines the ultimate outcome. For example, while genes play a role in determining a person's height, the nutrition and health that person experiences in childhood also have a large effect.
Thursday, May 24, 2007
Mental health
According to the World Health Organization (WHO), there is no one "official" definition of mental health. Cultural differences, subjective assessments, and competing professional theories all affect how "mental health" is defined. In general, most experts agree that "mental health" and "mental illness" are not opposites. In other words, the absence of a recognized mental disorder is not of necessity an indicator of mental health.
One way to think about mental health is by looking at how efficiently and successfully a person functions. Feeling capable and competent; being able to handle normal levels of stress, preserve satisfying relationships, and lead an independent life; and being able to "bounce back," or recover from difficult situations, are all signs of mental health.
Encompassing your emotional, social, and—most importantly—your mental well-being; All these aspects—emotional, physical, and social—must function jointly to achieve overall health.
Sunday, May 20, 2007
Refrigerator
Tuesday, May 15, 2007
Color Television
Color television in the United States had a prolonged history due to incompatible technical systems vying for approval by the Federal Communications Commission for commercial use. Mechanically scanned color television was established by Bell Laboratories in June 1929 using three complete systems of photoelectric cells, amplifiers, glow-tubes, and color filters, with a series of mirrors to place over the red, green, and blue images into one full color image.
In the electronically scanned era, the first color television exhibition was on February 5, 1940, when RCA privately showed to members of the FCC at the RCA plant in Camden, New Jersey, a television receiver producing images in color by electronic and optical means without moving device. CBS began non-broadcast color experiments using film as early as August 28, 1940, and live cameras by November 12. The CBS "field sequential" color system was partly mechanical, with a disc made of red, blue, and green filters revolving inside the television camera at 1,200 rpm, and a similar disc spinning in synchronization in front of the cathode ray tube inside the receiver set. The RCA "dot sequential" color system had no moving parts, using a series of diachronic mirrors to separate and direct red, green, and blue light from the subject through three separate lenses into three scanning tubes, and electronic switching that allowed the tubes to send their signals in rotation, dot by dot. These signals were sorted by a second switching device in the receiver set and sent to red, green, and blue picture tubes, and combined by a second set of diachronic mirrors into a full color image.
Friday, May 11, 2007
Key
Most people in modern society use keys on a daily basis, to secure their home, their vehicle, or to access their workplace, among other uses. Those that use a number of keys will typically place them on a ring or key chain, often with other items such as key fobs.
Monday, May 07, 2007
Ancient Tamil gods and goddesses
Wednesday, May 02, 2007
Traffic calming
Traffic calming has traditionally been justified on the grounds of pedestrian security and reduction of noise and local air pollution which are side effects of the traffic. However, it has become increasingly apparent that streets have many social and recreational functions which are severely impaired by fast car traffic. For example, residents of streets with light traffic had, on average, three more friends and twice as many acquaintances as the people on streets with heavy traffic which were otherwise similar in dimensions, income, etc. For much of the twentieth century, streets were designed by engineers who were charged only with ensuring traffic flow and not with fostering the other functions of streets. The rationale for traffic calming is now broadening to include designing for these functions.
Displaced traffic is not fully pushed onto other routes, as some travelers may begin to walk or use other modes such as public transit and bicycles to get where they are going. Still, in most cases the affected motorists have few alternatives aside from either navigating the newly erected obstacles or finding a more palatable route. This happens because high traffic tends to be generated by motorists passing through the area and not by the local residents.
It should be noted the some of these measures have a tendency to irritate and annoy drivers rather than calm them and others can actually increase traffic throughput. Some drivers who slow down at calming points, however, accelerate and speed after passing them in order to "catch up for lost time". For this reason, more advanced methods integrated into the design of the street, which make slower speeds seem more natural to drivers and less of an artificial imposition, are now preferred - the goal is to slow down the driver through psychological, at least partly subconscious means instead of simply forcing him to do so.
One major side effect of traffic reassuring is the impedance to emergency services. A police car can easily navigate most traffic reassuring measures. The same cannot be said for fire trucks and ambulances, however. They often have to slow down to safely cross speed bumps or chicanes. In some locales, the law prohibits traffic calming measures along the routes used by the urgent situation services.
There are 3 "E"'s that traffic engineers refer to when discussing traffic reassuring: engineering, education, and enforcement. Because neighborhood traffic management studies have shown that often it is the residents themselves that are largely contributing to the perceived speeding problem within the neighborhood, it is strained that the most effective traffic calming plans will entail all three components, and that engineering measures alone will not produce satisfactory results.
Sunday, April 29, 2007
Lightning
Early lightning investigate
During early investigations into electricity via Leyden jars and other instruments, a number of people planned that small scale sparks shared some similarity with lightning.
Benjamin Franklin, who also imaginary the lightning rod, endeavored to test this theory by using a spire which was being erected in Philadelphia. Whilst he was waiting for the spire completion some others conducted at Marly in France, what became to be known as the Philadelphia experiments that Franklin had optional in his book?
Franklin typically gets the credit for being the first to perform this research. The Franklin myth goes like this:
Whilst coming up for completion of the spire, he got the idea of using a flying object, such as a kite in its place. During the next shower, in June 1752, he raised a kite, accompanied by his son as an assistant. On his end of the string he emotionally involved a key and tied it to a post with a silk thread. As time passed Franklin noticed the loose fibers on the string stretching out; he then brought his hand close enough to the key and a flash jumped the gap. The rain which had fallen during the storm had covered with water the line and made it conductive.
However, in his memoirs, Franklin obviously states that he only performed this research after those made in France.
As news of the research and its specifics spread, it was met with attempts at duplication. Experiments involving lightning are always risky and commonly fatal. The most well known death during the rash of Franklin-imitators was Professor George Richman, of Saint Petersburg, Russia. He had shaped a setup similar to Franklin's, and was attending a meeting of the Academy of Sciences, when he heard thunder. He ran home with his engraver to capture the event for posterity. While the research was underway, a large ball lightning showed up, collided with Richman's head, and killed him, leaving a red spot. His shoes were blown open, parts of his clothes singed, the engraver knocked out, the doorframe of the room was split, and the door itself ragged off its hinges.
Monday, April 23, 2007
Northern Mockingbird
They are usually permanent residents; northern birds may move south during harsh weather. However, this species has occurred in Europe as an extreme rarity.These birds forage on the ground or in vegetation; they also fly down from a perch to capture food. They mainly eat insects and berries. While foraging they will regularly spread their wings in a peculiar two-step motion to display the white patches underneath. The purpose of this behavior is disputed. Some ornithologists claim this is merely a territorial display, while others say that flashing the white patches startles hiding insects and forces them into the open. Both theories seem to have some merit.
This bird imitates the calls of other birds, animal sounds and yet machine noises. It is often found in urban areas. They often call through the night and may continue year-round apart from for the summer moulting season. Mockingbirds usually sing the loudest in the twilight of the early morning when the sun is on the horizon. While singing on a high perch they will often bolt more than a few feet into the air in a looping motion, with wings outstretched to display their white underside, then land back on the perch without breaking a note. That serves as a territorial display.Mockingbirds have a strong preference for certain trees, such as maple, sweet gum (green 5-pointed leaves and prickly porous balls), and sycamore. They normally avoid pine trees. In urban areas, mockingbirds rarely come down to the ground, unlike most birds. Also, they have a particular preference for high places, such as the topmost branches of trees and the tops of telephone poles.
Wednesday, April 18, 2007
Motorcycle racing
Motocross and its cousin supercross are held on dirt courses, characteristically featuring large jumps in which motorcycles are launched over considerable distances. Supermoto is a crossover motorcycle racing between road racing and motocross. The motorcycles are primarily motocross types with road racing tires. The racetrack is also mixed between road and dirt courses, mostly handcrafted.
Motorcycle speedway and ice speedway are held on oval circuits where riders slide their machines around turns.
Monday, April 09, 2007
Radio
Radio waves.Radio waves are a form of electromagnetic radiation, formed whenever a charged object accelerates by a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. This is the variety from a few tens of hertz to a few hundred gigahertz.Electromagnetic radio spectrum
Other types of electromagnetic radiation, with frequencies above the RF range are infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.Radio transmission diagram and electromagnetic waves.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not need a medium of transport induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. Although the word 'radio' is used to explain this phenomenon, the transmissions which we know as television, radio, radar, and cell phone are all classed as radio frequency emissions.
Thursday, April 05, 2007
Transistor
Sunday, April 01, 2007
Sugarcane
Saccharum officinarum grown in Hawaii. There are 13 million hectares (32 million acres) of sugar cane plantations worldwide, with over 100 countries growing the crop. The top twenty producing countries harvested 1200 million metric tons of sugar cane in 2002 (more than 6 times the amount of sugar beet produced). The largest producers are Brazil, India, and China.
Raw sugar has a yellow to brown color. If a white product is preferred, sulfur dioxide may be bubbled through the cane juice prior to evaporation. This bleaches many color-forming impurities into colorless ones. Sugar bleached white by this sulfitation process is called mill white, plantation white or crystal sugar. This form of sugar is the most usually consumed form of sugar in sugarcane-producing countries.
Tuesday, March 27, 2007
Lens
The earliest records of lenses date to Ancient Greece, with Aristophanes' play The Clouds (424 BC) mentioning a burning-glass (a convex lens used to focus the sun's rays to produce fire). The writings of Pliny the Elder also show that burning-glasses were recognized to the Roman Empire, and mentions what is possibly the first use of a corrective lens: Nero was known to watch the gladiatorial games throughout a concave-shaped emerald (presumably to correct for myopia). Seneca the Younger (3 BC--65) described the magnifying effect of a glass globe filled with water.Widespread use of lenses did not happen until the invention of spectacles, probably in Italy in the 1280s.
Thursday, March 22, 2007
Ship
Nautical means connected to sailors, particularly customs and practices at sea. Naval is the adjective pertaining to ships though in common usage, it has come to be more mainly associated with the noun 'navy'.
Friday, March 16, 2007
White flight
White flight in the United States
White flight has been taking place in many American cities and regions, particularly in the Northeastern, Midwestern, and Western sections of the United States since the 1950s.
The effects of white flight have been important for the cities that have been hit by this phenomenon, in particular Detroit, Michigan and St. Louis, Missouri, which lost more than half of their peak populations mainly due to white flight. In New York City many whites have moved from parts of the Bronx and Brooklyn to Staten Island, suburban Long Island, and suburban New Jersey. Other U.S. cities that have been obviously affected by white flight include Philadelphia, Pennsylvania, Cleveland, Ohio, the West and South Sides of Chicago, Illinois, the Greater Los Angeles Area, Baltimore, Maryland, Newark, New Jersey, and numerous smaller cities.
Monday, March 12, 2007
Quinzhee
It is not easy to make a quinzhee, although it will be warmer and stronger if certain techniques are carefully followed. For strength, the quinzhee needs to be a dome and the lower walls must not support too much weight. The walls should be very thick at the base and get slightly thinner towards to the top of the dome.
For warmth, the entrance of the quinzhee should be a tunnel with an upward sloping floor such that the floor is somewhat higher than the top of the entrance.
Caution: Care must be taken when camping conditions are marginal, such as at temperatures near freezing, or when it is raining. Under these conditions the ceiling of the quinzhee may collapse gradually because the snow is soft. Moreover, the entrance tunnel may become too narrow to permit escape. Hence, under these conditions it is unsafe to spend too much time inside the structure because you may become trapped.
Wednesday, March 07, 2007
Graphic design
There are varying degrees of graphic design. Graphic designer participation may range from verbally communicated ideas, to visual rough drafts, to final production. In commercial art, client edits, technical preparation and mass production are generally required, but regularly not considered to be within the scope of graphic design unless the client is also a graphic designer.
Friday, March 02, 2007
Tourism in New York City
New York City has 28,000 acres (113 km²) of parkland and 14 miles (22 km) of public beaches. Manhattan's Central Park, intended by Frederick Law Olmsted and Calvert Vaux, is the most visited city park in the United States.Prospect Park in Brooklyn, also planned by Olmsted and Vaux, has a 90 acre (36 Hectare) meadow. Flushing Meadows Park in Queens, the city's third largest, was the setting for the 1939 World's Fair and 1964 World's Fair.
New York's food culture, influenced by the city's immigrants and large number of dining patrons, is diverse. Jewish and Italian immigrants made the city famous for bagels and New York style pizza. Some 4,000 mobile food vendors approved by the city, many immigrant-owned, have made Middle Eastern foods such as falafels and kebabs standbys of contemporary New York street food.The city is also home to many of the finest haute cuisine restaurants in the United States.
Monday, February 26, 2007
Space term-In geography
Ownership of space is not limited to land. Ownership of airspace and of waters is determined internationally. Other forms of ownership have been newly asserted to other spaces — for example to the radio bands of the electromagnetic spectrum or to cyberspace.
Public space is a word used to define areas of land is collectively owned by the community, and managed in their name by delegated establishment. Such spaces are open to all, while private property is the land owned by an individual or company, for their own use and happiness.
Abstract space is a word used in geography to refer to a hypothetical space characterized by complete homogeneity. When modeling movement or behavior, it is a conceptual tool used to limit extraneous variables such as terrain.
Wednesday, February 21, 2007
Glass artifacts
Thursday, February 15, 2007
Music
Although amateur musicians vary from professional musicians in that amateur musicians have a non-musical source of income, there are often many links between amateur and professional musicians. Beginning amateur musical group take lessons with professional musicians. In community settings, highly developed amateur musicians perform with professional musicians in a variety of ensembles and orchestras. In some rare cases, amateur musicians reach a professional level of competence, and they are able to perform in professional performance settings.
A difference is often made between music performed for the advantage of a live audience and music that is performed for the use of being recorded and distributed through the music retail system or the broadcasting system. However, there are also many cases where a live performance in front of an audience is recorded and spread (or broadcast).
Thursday, February 08, 2007
Software
Software is a program that enables a computer to achieve a specific task, as contrasting to the physical components of the system (hardware). This include application software such as a word processor, which enables a user to achieve a task, and system software such as an operating system, which enables other software to run suitably, by interfacing with hardware and with other software.
The term "software" was first used in this intellect by John W. Tukey in 1957. In computer science and software engineering, computer software is all computer program. The perception of reading different sequences of instructions into the memory of a apparatus to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the source for most modern software was first projected by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungs problem.
TypesPractical computer systems partition software into three major classes: system software, programming software and application software, although the division is subjective, and often blurred.
* System software is one of the major class helps run the computer hardware and computer system. It includes working systems, device drivers, analytical tools, servers, windowing systems, utilities and more. The intention of systems software is to protect the applications programmer as much as possible from the details of theexacting computer complex being use, especially memory and other hardware features, and such accessory procedure as communications, printers, readers, displays, keyboards, etc.
* Programming software usually provide tools to support a programmer in writing computer programs and software with different programming languages in a more suitable way.The tools comprise text editors, compilers, interpreters, linkers, debuggers, and so on, An incorporated development environment (IDE) merge those tools into a software bundle, and a programmer may not need to type various command for compiling, interpreter, debugging, tracing, and etc., because the IDE typically has an sophisticated graphical user interface, or GUI.
* Application software allows humans to complete one or more explicit (non-computer related) tasks. typical applications include manufacturingautomation, business software, educational software, medical software, databases and computer games. Businesses are possibly the biggest users of application software, but approximately every field of human action now uses some form of application software. It is used tocomputerizeall sorts of functions.
Sunday, February 04, 2007
The Real Miracle
The water of Mahim Creek, sweetened or otherwise, is dirty and would scandalize not only the likes of Sunita Narain of the Centre for Science and Environment. Maharashtra Chief Minister Vilasrao Deshmukh and officials of the Municipal Corporation of Greater Mumbai have already request to people not to drink the water. Industrial waste is not the finest ingredient for a miracle. But telling this to goggle-eyed people facing even more goggle-eyed TV cameras is as worthwhile as persuasive people that a Ganesh idol sipping milk is caused by suction and not godly lactose tolerance.
Fortunately, rumors of the sweetened water turning back to its original brackish form might stop a future surge. Now we only wait for the real miracle of no one complaining of sickness.
Friday, January 26, 2007
Journalism Basics
That's not all, though. In addition to dedicated training in writing, editing, and reporting, Journalism wants a working knowledge of history, culture, and current events. You'll more than likely be required to take up a broad range of courses that runs the range from statistics to the hard sciences to economics to history. There would also be a lot of haughty talk about professional ethics and civic responsibility too - and you'll be tested on it. To top it all off, you'll perhaps work on the university newspaper or radio station, or possibly complete an internship with a magazine or a mass media conglomerate.