The Telephone
Tutorials/exercises - 4 pages - Electronics, mechanics, engineering & technology
Phones have been integral to the evolution of communications and can be considered to have been the most prominent icon of interpersonal interactions over long distances. From the moment Alexander Graham Bell say those famous words to Thomas Watson over the first incarnation of the telephone...
Skeletal Radiology and Bone Growth
Tutorials/exercises - 4 pages - Biology
Radiographic examination is the key to the diagnosis of many skeletal abnormalities. It is essential that each bone be examined in its entirety, including the cortex, medullary canal (cancellous bone or spongiosa), and articular ends. The position and alignment of joints are determined. In...
PERCOCET: How it works
Tutorials/exercises - 2 pages - Medical studies
Percocet is a well known pain killer used to treat pain for moderate to severe sufferers of a wide variety of ailments. Percocet, or similarly composed products containing narcotics, are prescribed by doctors quite often for various forms of serious pain (ranging from severe, chronic, cases such...
Analysis of an Association between Nicotine Dependence and Attention-Deficit/Hyperactivity Disorder
Essay - 5 pages - Biology
The goal of this paper is to evaluate the significance of the co-morbidity of nicotine abuse in adolescents afflicted with ADHD (Attention-Deficit Hyperactivity Disorder). Due to the nature of the disorder and its possible underlying pathophysiology of dopaminergic dysfunction, the use of...
Novel pressure-relief wheelchair: research paper
Tutorials/exercises - 30 pages - Biology
Pressure sores are painful and debilitating tissue wounds which commonly affect wheelchair users. Current treatment of pressure sores requires bed-rest for up to sixteen weeks, which is unacceptable for patients with active life-styles. The purpose of our project is to design a wheelchair that...
The Obesity Factor
Essay - 3 pages - Medical studies
As Becky waits for the bus on a chilly Thursday night she paces back and forth in anticipation. Stressing over why the bus is taking so long, she feels a pang of hunger in her stomach and realizing that she hasn't got anything at home to eat, she decides to quickly run across the street and grab...
E-mail: Use It or Lose It?
Essay - 2 pages - Computer science
Individuals living in today's modern world have differing opinions concerning the so-called advantages of new technology that is available to us. Some are pro- innovation and believe that it has had a positive effect on our lives, while others believe that new technology has negatively influenced...
Water Research Project
Case study - 4 pages - Biology
The human body is composed of 50-80% water. Blood and muscles contain significant amounts, and approximately 95% of the brain is water. All body systems and organs need water to function properly, and will shut down without it. Most of the chemical reactions that take place in our body need water...
Face Value: The Complexities of Genetic Engineering
Essay - 2 pages - Biology
Society is no stranger to technology - it has been adapting it and advancing it for decades. Technology has completely revolutionized the way we interact each other as well as ourselves. Due to this complete integration, there has been an addiction formulated. Human beings now thrive on...
Natural Selection vs. Divine Creation
Essay - 3 pages - Biology
From the beginning of the ideas presented by Charles Darwin in The Origin of Species, and their gaining support from the scientific community, the theory of evolution was been met with opposition. A great deal of this opposition came from religious groups who believed in a creation from a divine...
Information System's Theory
Essay - 2 pages - Computer science
Karl E. Weick is one of the most influential people when it comes to organizational strategy and information systems. He was born on October 31, 1936 in Warsaw, Ind. and has served as a theorist and information specialist for many years, most recently at the University of Michigan (where he...
Effects of Road Salt on Germination and Growth
Tutorials/exercises - 11 pages - Biology
This report examined the effects of road salt in relation to growth and germination in the Brassica rapa, a common turnup flower. The initial questions considered if the salt would actually affect the growth. There were four groups of plants which were collected. The groups included a control...
Results and Figures of Salt on Germination and Growth
Essay - 3 pages - Biology
Finding the effects of salt on germination and growth of plants took twenty-two days of research. Each collection day the height, height of the leaf, color, height of the node, number of buds, and the number of the flowers were taken into account. Based on the original hypothesis stating that the...
Brassica Rapa in Comparison With Sodium Chloride
Essay - 4 pages - Biology
In this study the Brassica Rapa will be tested to see if salt water effects it's growth. Data will be taken from four different types of groups: distilled water; 0.25% of sodium chloride; 1.00% of sodium chloride; and 4.00% of sodium chloride. Data will be collected in a twenty-two day span,...
How Mad is Reefer?
Essay - 4 pages - Physics
From the age of twelve and older nearly 40% of our country, about 98 million Americans, has used Cannabis sativa for its psychological and physiological effects in much the same way as it has been throughout recorded history (AMA Council). This lengthy past has constructed a harsh stigma around...
Taking Candy from Strangers: Why Not?
Essay - 3 pages - Computer science
The word “stranger” carries negative connotations in society, especially when associated with the Internet. Parents are lectured by authorities to monitor their children's use of chat rooms. E-mail filters remove millions of unwanted and sometimes grotesque advertisements from strangers...
The Social History of LSD
Essay - 4 pages - Biology
When Albert Hofmann created LSD 25 during experimentation in his laboratory, he had no idea what was to become of it, or what kind of an impact it would have. "Dr. Humphry Osmond invented the term 'psychodelic', which was later amended to 'psychedelic to get rid of the nuthouse...
The CCR5-Delta 32 Genetic Mutation and Human Evolution - published: 27/11/2007
Essay - 2 pages - Biology
Genetic mutations are not uncommon. They can happen for a variety of reasons and have a variety of effects. Those with negative effects are weeded out by natural selection, and those with positive effects prevail and are accumulated due to natural selection. These mutations can be caused by a...
Venomous Lizards
Essay - 2 pages - Biology
The two venomous lizards of the world are impressive creatures about which much misinformation has been spread for centuries. They have been thought to possess supernatural features such as poisonous breath, a stinging tail and the ability to spit their venom. The Gila monster (Heloderma...
Venomous Snakes
Tutorials/exercises - 4 pages - Biology
The term pit viper comes from the presence of paired, highly sensitive, thermoreceptor organs (pits) present on the forward portion of these snakes' heads. These structures, also known as foveal organs, serve the snake in locating prey, aiming strikes, and adjusting venom dose. The foveal...
An Assessment of Historical and Contemporary Land Use at Hedgehog Mountain, Freeport, Maine, via Field Observation
Case study - 5 pages - Biology
The purpose of this investigation was to collect information that allowed the formulation of a hypothesis as to the land-use history of the Hedgehog Mountain preserve, and to correlate empirical observations with a limited literature review in an attempt to validate the hypothesis presented. The...
Genes and Chromosomes
Tutorials/exercises - 6 pages - Medical studies
As a first approximation, genes can be defined as stretches of DNA that encode a single protein or a single functional RNA, such as an rRNA or tRNA. There are exceptions to this rule because there are mechanisms, such as alternative splicing of the primary RNA transcript into different mRNAs,...
Pelvic Circulation
Tutorials/exercises - 2 pages - Medical studies
At the bifurcation of the aorta, the middle sacral artery arises posteriorly and travels on the pelvic surface of the sacrum to supply branches to the sacral foramina and the rectum. The common iliac arteries arise at the level of the fourth lumbar vertebra, run anterior and lateral to their...
Pelvic Innervations
Essay - 2 pages - Medical studies
Surgical Anatomy of the Retroperitoneum, Kidneys, and Ureters; only the pelvic courses of its nerves are reviewed here. The iliohypogastric nerve (L1) travels between, and supplies, the internal oblique and the transversus muscles and pierces the internal and external oblique muscles 3 cm above...
Anatomy of the Lower Urinary Tract and Male Genitalia
Tutorials/exercises - 4 pages - Medical studies
The pelvic bones are the sacrum (the termination of the axial skeleton) and the two innominate bones. The latter are formed by the fusion of the iliac, ischial, and pubic ossification centers at the acetabulum. The ischium and pubis also meet below, in the center of the inferior ramus, to form...
The Amnion
Tutorials/exercises - 3 pages - Medical studies
The amnion at term is a tough and tenacious but pliable membrane. It is the innermost fetal membrane and is contiguous with the aminonic fluid. This particular avascular structure occupies a role of incredible importance in human pregnancy. In many obstetrical populations, preterm premature...
Blood Circulation in the Mature Placenta
Tutorials/exercises - 2 pages - Medical studies
Because the placenta functionally represents a rather intimate association of the fetal capillary bed to maternal blood, its gross anatomy primarily concerns vascular relations. The fetal surface of the placenta is covered by the transparent amnion beneath which the fetal chorionic vessels...
Organization of Placenta
Tutorials/exercises - 2 pages - Medical studies
From the electron microscopic studies of Wislocki and Dempsey (1955), data were provided that permitted a functional interpretation of the fine structure of the placenta. There are prominent microvilli on the syncytial surface, corresponding to the "brush border" described by light microscopy....
Embryonic and Placental Development
Tutorials/exercises - 2 pages - Medical studies
In a description of the earliest stages of the human blastocyst, the wall of the primitive blastodermic vesicle was characterized as consisting of a single layer of ectoderm. As early as 72 hours after ovum fertilization, the 58-cell blastula had differentiated into 5 embryo-producing cells and...
Immunological Acceptance of the Conceptus
Tutorials/exercises - 3 pages - Medical studies
Over the last half century, many attempts to explain the survival of the semiallogenic fetal graft have been proposed. One of the earliest explanations was based on the theory of antigenic immaturity of the embryo-fetus. This was disproved by Billingham (1964) who showed that transplantation...
