Aurora Borealis / Educational Video. NASA Connect - DITNS - Aurora Borealis. This work is
Aurora Borealis / Educational Video. NASA Connect - DITNS - Aurora Borealis. This work is licensed under a Creative Commons Attribution 2.5 License. NASA Connect Segment exploring the Aurora Borealis or Northern Lights. This segment exlains this natural phenomena and its history. Year: 2004. Keywords: Aurora Borealis; Northern Lights; Artificial Aurora; Terrella; Magnetism; Earth; Electrons; Natural Phenomena; Plasma; Solar Wind; Light Particles; Atmospheric Gases; Duration: 00:04:39; Sponsor: NASA; Contributing Organization: NASA. Auroras (North/South Polar Lights; or aurorae, sing.: aurora) are natural colored light displays in the sky, usually observed at night, particularly in the polar zone. They typically occur in the ionosphere. Some scientists call them "polar auroras" (or "aurorae polares"). In northern latitudes, the effect is known as the aurora borealis, named after the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas. It often appears as a greenish glow or sometimes a faint red, as if the sun was rising from an unusual direction. The aurora borealis is also called the northern polar lights, as it is only visible in the North sky from the Northern Hemisphere. The aurora borealis most often occurs from September to October and from March to April. The Cree call this phenomenon the Dance of the Spirits. Its southern counterpart, the aurora australis/southern polar lights, has similar properties. Australis is the Latin word for "of the South". Benjamin Franklin first brought attention to the "mystery of the Northern Lights." He theorized the shifting lights to a concentration of electrical charges in the polar regions intensified by the snow and other moisture. Auroras are produced by the collision of charged particles from Earth's magnetosphere, mostly electrons but also protons and heavier particles, with atoms and molecules of Earth's upper atmosphere (at altitudes above 80 km). The particles have energies of 1 to 100 keV. They originate from the Sun and arrive at the vicinity of Earth in the relatively low-energy solar wind. When the trapped magnetic field of the solar wind is favourably oriented (principally southwards) it reconnects with Earth's magnetic field, and solar particles enter the magnetosphere and are swept to the magnetotail. Further magnetic reconnection accelerates the particles towards Earth. The collisions in the atmosphere electronically excite atoms and molecules in the upper atmosphere. The excitation energy can be lost by light emission or collisions. Most aurorae are green and red emission from atomic oxygen. Molecular nitrogen and nitrogen ions produce some low level red and very high blue/violet aurorae. The light blue colors are produced by ionic nitrogen and the neutral nitrogen gives off the red and purple color with the rippled edges. Different gases interacting with the upper atmosphere will produce different colors, caused by the different compounds of oxygen and nitrogen.
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How Drinking Alcohol Can Impair One's Judgement When Driving. A partially-animated, humoro
How Drinking Alcohol Can Impair One's Judgement When Driving. A partially-animated, humorous short that illustrates how drinking alcohol can impair one's judgement when driving. Animation by Pat Oliphant. Director: Stan Phillips. Production Company: Stan Phillips and Associates. Keywords: evil alcohol; driver education; animation. Creative Commons license: Public Domain
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Kinetic Art Masterpiece. A special video project Tim Fort worked on in New York Mills, Min
Kinetic Art Masterpiece. A special video project Tim Fort worked on in New York Mills, Minnesota in August of 2005. It showcases many of his unique kinetic-art techniques. Producer: Tim Fort. Keywords: Tim Fort; kinetic art; gadget; chain reaction; domino; tumbling. Contact Information: lunatim@infionline.net http://www.lunatim.com/kinart/kinetic.shtml
Creative Commons license: Attribution-NonCommercial-NoDerivs
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Added: 5 months ago
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A short demonstration of morphing a cube in art of illusion. Creative Commons license: Att
A short demonstration of morphing a cube in art of illusion. Creative Commons license: Attribution.
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Added: 7 months ago
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Public domain video from the US Armed Forces entitled, "One-sided Argument".Public domain
Public domain video from the US Armed Forces entitled, "One-sided Argument".Public domain video from the US Armed Forces entitled, "One-sided Argument". Suicide is the eleventh most common cause of death in the United States. People may consider suicide when they are hopeless and can't see any other solution to their problems. Often it's related to serious depression, alcohol or substance abuse, or a major stressful event. People who have the highest risk of suicide are white men, though women and teens report more suicide attempts. If someone talks about suicide, you should take it seriously. Urge them to get help from their doctor or the emergency room, or call 911. Therapy and medicines can help most people who have suicidal thoughts. Treating mental illnesses and substance abuse can reduce the risk of suicide.Suicide is defined as the act of deliberately taking one's own life. It occurs most often in response to a crisis such as a death or the loss of a relationship or job. During a crisis people experience a wide range of feelings, and each person's response to crisis is different. It is normal to feel frightened or anxious or depressed. If a person feels overwhelmed or unable to cope, he or she may try to commit suicide. Almost all people who kill themselves either suffered from depression or had substance abuse problems. People who are lonely and isolated or who have histories of previous suicide attempts are also at greater risk for attempting suicide. In 1996, approximately 31,000 people died of suicide in the United States. Suicide is the eighth leading cause of death overall, and the third leading cause of death among American teenagers. In Canada, suicide is second only to motor-vehicle accidents as a cause of death among adolescents. The suicide rate is twice the murder rate among those aged 15 to 24, and it has increased dramatically in recent years. Each year, two thousand adolescents commit suicide in the United States. The highest suicide rates in the United States are found in white men over age 85. Men are more than four times as likely as women to die by suicide, yet women are more likely to make a nonlethal suicide attempt. Suicide is a major public health problem. The need for a public health approach to suicide can be found in the African-American community, where the suicide rate among youths more than doubled between 1980 and 1995. Further, the number of suicides in the United States outnumbered homicides in 1995. Each year, firearms are used as many times for suicide as they are for murder. In some other countries, 71 percent of all firearm deaths are suicide. Attempted and completed suicides result in enormous social, economic, and medical costs. Suicide is very disruptive to the quality of life of survivors and their families and friends. In 1995 it was estimated that in the United States each suicide attempt costs approximately $33,000. The cost of a completed suicide has been estimated at almost $400,000. These estimates were derived from factors including the expense of hospitalization, medication, and more general social costs. Public health professionals have a major role to play in addressing the problem of suicide. Public health programs and policies can play a part before, during, and after completed or attempted suicides. First, public health programs are an important aspect of the prevention of suicide. Education campaigns can be used to increase knowledge and to change people's attitudes, beliefs, and values about suicide, and about people who may have attempted suicide. People may have distorted ideas about suicidal persons. For example, it is a myth that people who commit suicide never talk about it first. Most people provide important warning signs that can help to reduce the risk of suicide. Public domain video from the US Armed Forces entitled, "One-sided Argument".
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Added: 1 year ago
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Anti-Abortion Prolife Video: Development of the Unborn Baby. Anti-Abortion Prolife Video:
Anti-Abortion Prolife Video: Development of the Unborn Baby. Anti-Abortion Prolife Video: Development of the Unborn Baby. Fetal Development; From conception to birth; Day 1: fertilization: all human chromosomes are present; unique human life begins. Day 6: embryo begins implantation in the uterus. Day 22: heart begins to beat with the child's own blood, often a different type than the mothers'. Week 3: By the end of third week the child's backbone spinal column and nervous system are forming. The liver, kidneys and intestines begin to take shape. Week 4: By the end of week four the child is ten thousand times larger than the fertilized egg. Week 5: Eyes, legs, and hands begin to develop. Week 6: Brain waves are detectable; mouth and lips are present; fingernails are forming. Week 7: Eyelids, and toes form, nose distinct. The baby is kicking and swimming. Week 8: Every organ is in place, bones begin to replace cartilage, and fingerprints begin to form. By the 8th week the baby can begin to hear. Weeks 9 and 10: Teeth begin to form, fingernails develop. The baby can turn his head, and frown. The baby can hiccup. Weeks 10 and 11: The baby can "breathe" amniotic fluid and urinate. Week 11 the baby can grasp objects placed in its hand; all organ systems are functioning. The baby has a skeletal structure, nerves, and circulation. Week 12: The baby has all of the parts necessary to experience pain, including nerves, spinal cord, and thalamus. Vocal cords are complete. The baby can suck its thumb. Week 14: At this age, the heart pumps several quarts of blood through the body every day. Week 15: The baby has an adult's taste buds. Month 4: Bone Marrow is now beginning to form. The heart is pumping 25 quarts of blood a day. By the end of month 4 the baby will be 8-10 inches in length and will weigh up to half a pound. Week 17: The baby can have dream (REM) sleep. Week 19: Babies can routinely be saved at 21 to 22 weeks after fertilization, and sometimes they can be saved even younger. Week 20: The earliest stage at which Partial birth abortions are performed. At 20 weeks the baby recognizes its' mothers voice. Months 5 and 6: The baby practices breathing by inhaling amniotic fluid into its developing lungs. The baby will grasp at the umbilical cord when it feels it. Most mothers feel an increase in movement, kicking, and hiccups from the baby. Oil and sweat glands are now functioning. The baby is now twelve inches long or more, and weighs up to one and a half pounds. Months 7 through 9: Eyeteeth are present. The baby opens and closes his eyes. The baby is using four of the five senses (vision, hearing, taste, and touch.) He knows the difference between waking and sleeping, and can relate to the moods of the mother. The baby's skin begins to thicken, and a layer of fat is produced and stored beneath the skin. Antibodies are built up, and the baby's heart begins to pump 300 gallons of blood per day. Approximately one week before the birth the baby stops growing, and "drops" usually head down into the pelvic cavity. Sources Used: Bergel, Gary (Produced by NRLC) "When You Were Formed in Secret." 1998. Flanagan, Geraldine Lux. Beginning Life. The Marvelous Journey from Conception to Birth. New York: DK Publishing Inc., 1996. Hopson, Janet L. Fetal Psychology. Oct. 1998. 07 Jan 2003. http://www.leaderu.com/orgs/tul/psych... Internet Sources: "Fetal Development." 07 Jan 2003. http://www.w-cpc.org/fetal1.html. Video from the public domain.
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Sniffles and Sneezes (1955) Public Domain. Children as carriers and victims of infections.
Sniffles and Sneezes (1955) Public Domain. Children as carriers and victims of infections. SHOWS HOW COLDS ARE SPREAD BY SNEEZING, COUGHING & CARELESS HANDLING OF INFECTED ARTICLES. OUTLINES PRECAUTIONS TO FOLLOW TO PREVENT SPREAD OF COLDS.
Producer: Audio Productions, Inc.
Public Domain film
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Added: 1 year ago
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Destruction: Fun or Dumb? - Part 2. Deals with vandalism -- one of the major problems faci
Destruction: Fun or Dumb? - Part 2. Deals with vandalism -- one of the major problems facing school administrators in every part of the country. Designed to make students realize that vandalism is dumb. Production Company: Counselor Films, Inc. Creative Commons license: Public Domain. Vandalism is the conspicuous defacement or destruction of a structure, a symbol or anything else that goes against the will of the owner/governing body, and usually constitutes a crime. Private citizens commit vandalism when they wilfully damage or deface the property of others or the commons. Some vandalism qualifies as culture jamming or sniggling — it is artistic in nature as well as being carried out illegally or without the property owner's permission. Examples include at least some graffiti art, billboard liberation and possibly crop circles. Criminal vandalism has many forms, graffiti on public property is common in many inner cities as part of a gang culture, however other more devastating forms such as those involved with public unrest, such as rioting, involve the wilful destruction of public and private property. Vandalism per se is often considered one of the least serious common crimes, but it can become quite serious when committed extensively, violently or as an expression of hatred and intimidation. In the case of vandalism to private property, the owner — the victim, may feel that they were specifically targeted by the perpetrator(s) — this is not necessarily the case. An example of such a crime would be the willful destruction of a car window for no obvious purpose save to give the perpetrator(s) possibly a few seconds of entertainment, with no consideration, or empathy for the detriment to the state of mind or inconvenience of the victim. Reasoning for such actions can be attributed to anger, envy or spontaneous, opportunistic behaviour — possibly for peer acceptance or bravado in gang cultures, or disgruntlement with the target (victim) person or society. Opportunistic vandalism of this nature may also be filmed, the mentality of which can be akin to happy slapping. The large scale prevalence of gang graffiti in some inner cities has almost made it acceptable to the societies based there — so much so that it may go unnoticed, or not be removed, possibly because it may be a fruitless endeavour, to be graffitied on once again. Sound and color remastered Catholic Homeschooling Media Network (CHMN).
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Destruction: Fun or Dumb? - Part 1. Deals with vandalism -- one of the major problems faci
Destruction: Fun or Dumb? - Part 1. Deals with vandalism -- one of the major problems facing school administrators in every part of the country. Designed to make students realize that vandalism is dumb. Production Company: Counselor Films, Inc. Creative Commons license: Public Domain. Vandalism is the conspicuous defacement or destruction of a structure, a symbol or anything else that goes against the will of the owner/governing body, and usually constitutes a crime. Private citizens commit vandalism when they wilfully damage or deface the property of others or the commons. Some vandalism qualifies as culture jamming or sniggling — it is artistic in nature as well as being carried out illegally or without the property owner's permission. Examples include at least some graffiti art, billboard liberation and possibly crop circles. Criminal vandalism has many forms, graffiti on public property is common in many inner cities as part of a gang culture, however other more devastating forms such as those involved with public unrest, such as rioting, involve the wilful destruction of public and private property. Vandalism per se is often considered one of the least serious common crimes, but it can become quite serious when committed extensively, violently or as an expression of hatred and intimidation. In the case of vandalism to private property, the owner — the victim, may feel that they were specifically targeted by the perpetrator(s) — this is not necessarily the case. An example of such a crime would be the wilful destruction of a car window for no obvious purpose save to give the perpetrator(s) possibly a few seconds of entertainment, with no consideration, or empathy for the detriment to the state of mind or inconvenience of the victim. Reasoning for such actions can be attributed to anger, envy or spontaneous, opportunistic behaviour — possibly for peer acceptance or bravado in gang cultures, or disgruntlement with the target (victim) person or society. Opportunistic vandalism of this nature may also be filmed, the mentality of which can be akin to happy slapping. The large scale prevalence of gang graffiti in some inner cities has almost made it acceptable to the societies based there — so much so that it may go unnoticed, or not be removed, possibly because it may be a fruitless endeavour, to be graffitied on once again. Sound and color remastered Catholic Homeschooling Media Network (CHMN).
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Added: 1 year ago
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