An Explanation of Buffering in C++

An Explanation of Buffering in C++ Buffer is a generic term  that refers to a block of computer memory that serves as a temporary placeholder. You might encounter the term in your computer, which uses RAM as a buffer, or in video streaming where a section of the movie you are streaming downloads to your device to stay ahead of your viewing. Computer programmers use buffers as well. Data Buffers in Programming In computer programming, data can be placed  in a software buffer before it is processed. Because writing data to a buffer is much faster than a direct operation, using a buffer while programming in C and C makes a lot of sense and speeds up the calculation process. Buffers come in handy when a difference exists between the rate data is received and the rate it is processed.   Buffer vs. Cache A buffer is temporary storage of data that is on its way to other media or storage of data that can be modified non-sequentially before it is read sequentially. It attempts to reduce the difference between input speed and output speed. A cache also acts as a buffer, but it stores  data that  is expected to be read several times to reduce the need to access slower storage.   How to Create a Buffer in C++ Usually, when you open a file, a buffer is created. When you close the file, the buffer is flushed. When working in C, you can create a buffer by allocating  memory in this manner: char* buffer new char[length]; When you want to free up the memory allocated to a buffer, you do so like this: delete[ ] buffer; Note: If your system is low on memory, the benefits of buffering suffer. At this point, you have to find a balance between the size of a buffer and the available memory of your computer.

Rock Tumbler Basics and Buying Guide

Rock Tumbler Basics and Buying Guide Basically, there are two ways you can go about buying a rock tumbler. You can pick up the standard educational-toy model online or at most toy stores or you can get a hobbyist/professional model. Whats the difference? The Standard Model Most toy stores carry various takes on the same model of ​a  rock tumbler. This is a rotating tumbler that comes with rocks, grit, and some jewelry findings. This model is fun and can last indefinitely with proper care. Be advised that your choice of rock size is limited by the small rotor power and that it may be difficult to get replacement parts (e.g., broken belt from overweighted tumbler). Rotating Tumblers The toy stores carry a type of rotating tumbler, where the rocks fall over and over and over, polishing rocks in much the same manner as the ocean has for millions of years. I recommend buying a tumbler from a company that has been around a while, with an established record of quality and service. Eventually, you will need a replacement part; you want the company to still be there when that happens. Lortone offers several sizes of tumblers, some with double barrels.   Vibrational Tumblers Vibrational or agitating tumblers dont actually tumble the rock, but use either ultrasound or spin around the vertical axis. They cost a bit more, but have two characteristics that make them more desirable for certain users: they polish rocks much more quickly and they retain the essential shape of the rocks rather than producing only rounded rocks. They are a bit quieter, too. Raytech is an established manufacturer of vibrational tumblers (and other lapidary equipment). Size Does Matter ...and for most people price does too, so balance the needs of your inner rock hound against the limitations of your bank account. Tumblers are sized according to the weight of the load they can continuously bear. The most common cause of rotor failure and belt breakage is improper or over-loading of the barrel. Smaller barrels hold smaller rocks (no big surprise), so larger barrels can hold both bigger rocks and more small rocks. Double barrels can be used to polish lots of rocks or to ensure a really good polish (if you reserve one barrel for that purpose). Helpful Preparation Tips Okay, so youve selected your tumbler! First, keep the time it takes to tumble in your mind (about a month for a rotating tumbler/ week or two for vibrating or agitating types). Get vaseline to seal the barrel against leaks! Buy extra grit (unless you want to keep that as an excuse to go out and buy more stuff). If noise is a concern, consider getting a cooler or other sound insulator to house the tumbler.

The Economist Magazine Research Paper Example | Topics and Well Written Essays - 1250 words

The Economist Magazine - Research Paper Example As the paper discusses digging back into the history of The Economist magazine, it only began with consumers not more than 1,969. As at present, a global record of March 2014 listed The Economist as the most read magazine by the world’s business and political leaders with a standing circulation of over 1.5 million. Launching of The Economist first edition in Spanish in 1967 helped a great deal in increasing its readers mainly aimed at Latin America. It boosted the sales to 100,000 by 1970. Almost at the same time in 1974, Andrew Knight, the new editor of The Economist at that time introduced pages on science and technology. According to the discussion the magazine further advanced with editor, Rupert Pennant-Rea, in 1986 innovating the Asian section, the Bagehot, and a page outlining sport in addition to the Lexington columns. Later in 1991, the Economist group took over Public Network Europe (PNE) that enabled them to publish the monthly magazine for the European executives in telecommunication network corporations†. By this time, 500,000 magazines were in circulation. Most changes in The Economist Group occurred in 1993 with Marjorie Scardino as the chief executive and Bill Emmott as the editor. He introduced the column for American. The sections included obituary page, Technology Quarterly, emerging market indicators and Charlemagne. At this point, foreign sales added up to about 80% of the total sales. It is this year that The Economist marked 150th anniversary. With a steady progress, in 1995, the group acquired a journal on commerce that was the primary source of information on shipping and transportation industries that were in the US.  

Education Essay Example | Topics and Well Written Essays - 1500 words - 5

Education - Essay Example An official curriculum is a written guide from the learner’s perspective clearly describing a designed plan to make both teaching and learning more effective. In education, an official curriculum provides a basis for accountability; it is a framework outlining the specific procedure and plan to be used in the teaching of the content. As a student, you will often notice that different courses have different instructions and resources that can be used to achieve the course objectives that not only state what is expected of the student, but also what is expected of the teacher. Operational curriculum is defined as what is taught by the teacher and how it is communicated (Posner, 2003). An operational curriculum states what students are required to learn in a specific subject, and the knowledge and skills they are to acquire from a particular subject. Operational curriculum helps to gauge how well a student understands the content by relating what is taught in class and the specif ic learning outcomes for the student. For example, the instructional content of mathematics is taught and communicated differently at different grades to ensure the concepts like multiplication and addition are understood proficiently. The hidden curriculum includes the norms and values of the surrounding society (Posner, 2003). The community most often demands that a school curriculum should be able to promote the right values, and as much as the school educational curriculum may be perceived suitable for children in terms of promoting such values, children might be vulnerable to few elements within the society which might pervert the educational process. For this reason, the hidden curriculum... This paper approves that an official curriculum provides a basis for accountability; it is a framework outlining the specific procedure and plan to be used in the teaching of the content. As a student, you will often notice that different courses have different instructions and resources that can be used to achieve the course objectives that not only state what is expected of the student, but also what is expected of the teacher. This paper makes a conclusion that the structure of the disciplines that has been promoted by Jerrold Zacharias, a scientist who for a long time had been attempting to improve the physics curriculum and saw this perspective as an avenue for incorporating modern physics into it. He is of the opinion of teaching only the most fundamental concepts and at the same time teaching students how to derive the rest of the knowledge from the same concept; and in the process of learning a lot of things can be applied practically and less of theory which will just remain in the mind. The Cognitive Perspective has its promoters in science such as Piaget who spent a lot of time trying to understand how children’s minds work and how different their thinking was from that of adults and how it was that they got to â€Å"learn† things that were abstract in nature. He shows how children need to be ready for the cognitive learning process to take place. Behavioral Perspective has been promoted by Edward Thorndike, the founder of behavioral psychology. He provided the necessary scientific theory for behavior through his works on behavioral objectives, in Arithmetic he was able to contribute greatly into the creation of a behavioral curriculum.

Role of Unions Research Paper Example | Topics and Well Written Essays - 250 words

Role of Unions - Research Paper Example ition, the unions’ role in shielding workers from increased inflation, growing unemployment and in influencing government policies in issues as health and other social factors is necessary (Serrano, 2011). Every organization has a HRM department that is mandated with the duty of hiring and looking at the welfare of the policies. In executing this role, the department influences the relationship between the employees and the organization. The department therefore has a role of achieving a cordial relationship between the organization and the employees by designing fair compensation, ensuring better working conditions, having better bargain, adhering to the labor laws and involving the employees’ emissaries in the formulation and implementation of organizations polices (Serrano, 2011). Through these, the employees’ relationship will be enhanced and their loyalty to the origination will be improved. Besides, the government also plays a significant role in ensuring workers plight are upheld. The government has a role of setting fair wage rates by altering minimum wage and in promulgating laws that protect the rights of the workers. The role will include that of penalizing organizations that breach the set regulations (Serrano, 2011). Simultaneously, the government should take interventionary measures between organizations and their workers in resolving labor disputes. In conclusion, the HRM department, government and the workers representatives must all play their roles in ensuring smooth relationship in the work force. Failure by any party to perform their tasks may result into labor disputes that will impair the functioning of the general

Communication Mechanism System

Communication Mechanism System Explain the importance of intercellular communication and describe the mechanism involved. Intercellular communication is important because it assist the nervous system to elongate the long-term process as growth, development, or reproduction. The endocrine system uses chemical messengers to relay information and instructions between cells. One of the mechanisms involved in intercellular communication is know as direct communication this communication is rare but is important when it occurs. This is when two cells of the same type and the cells must be in extensive physical contact. The cells are so close they function as one. The majority of the communication is known as paracrine communication which is where the cell continuously exchange chemical messages between each other so they in sink with one another. Compare and contrast the modes of intercellular communication used by the endocrine and nervous systems and discuss the functional significance of the differences between the two systems. The nervous system performs short term â€Å"crisis management† and the endocrine system regulates long-term, ongoing metabolic processes. The endocrine system uses endocrine communication which helps regulate hormones through the circulatory system and the nervous system dose not have the capability to do this. Another significant difference is synaptic communication the nervous system uses this form of communication of neurons to release neurotransmitter at a synapse very close to a target cell that bear the right receptors. This form of communication allows the body to react quickly to situations to escape from harm. 3. Explain the general mechanisms of hormonal action and identify which hormone types work through each mechanisms. A hormone receptor is a protein molecule to which a particular molecule binds strongly. Each cell has receptors for responding to several different hormones, but cells in different tissues have different combinations of receptors. For every cell, the presence or absence of a specific receptor determines the cells hormonal sensitivities. Hormone receptors are located either on the cell membrane or inside the cell. The mechanisms of hormonal action are that receptors for catecholamines, peptide hormones, and eicosanoids are in the cell membrane of target cells, Thyroid and steroid hormones cross the cell membrane and bind to receptors in the cytoplasm or nucleus, activating or inactivating specific genes. 4. Describe the control of endocrine organs. The endocrine organs are controlled by three mechanisms of the hypothalamic control. One is the secretion of regulatory hormones to control activity of anterior lobe of pituitary gland. Two the production of ADH and oxytocin. And finally is the control of sympathetic output to adrenal medullae. Explain the structural and functional relationship between the pituitary gland and the hypothalamus. The pituitary gland releases nine important peptide hormones; all bind to membrane receptors and use cyclic-AMP as a second messenger. The pituitary gland hangs inferior to the hypothalamus which all the anterior lobe of the pituitary gland to help in the function of the hypophyseal portal system. By the hypothalamus secreting specific regulatory hormones it controls the production of hormones in the anterior lobe. This whole system works to secret hormones from the hypothalamus through the pituitary gland in a network of capillaries that are connected. All this ensures that all the hypothalamic hormones entering the portal vessels will reach the target cells in the anterior lobe of the pituitary gland before entering general circulation. 6. Predict how alternations in hormone production, delivery, or reception by target tissues would affect its action and blood concentration levels. Describe the factors that could determine a cells hormonal sensitivity. Cells sensitivity is determined by two factors down-regulation and up-regulation. Down regulation is a process in which the presence of a hormone triggers a decrease in the number of hormone receptors. This process is when levels of particular hormones are high, cells become less sensitive to it. Up-regulation is a process in which the absence of a hormone triggers an increase in the number of hormone receptors. In this process the levels of a particular hormone are low, cells become more sensitive to it. Identify the hormones produced by the anterior and posterior lobes of the pituitary gland and specify the functions of those hormones. The anterior lobe produces seven hormones: Thyroid-stimulating hormone (TSH) targets the thyroid gland and triggers the release of thyroid hormones. As circulation concentrations of thyroid hormones rise, the rate of TRH and TSH production decline. Adrenocorticotropic hormone (ACTH) stimulates the release of steroid hormones by the adrenal cortex and targets cells that produce glucocorticoids. Gonadotropins regulate the activities of the gonads. Follicle-stimulating hormone (FSH) promotes follicle development in females and, in combination with luteinizing hormone, stimulates the secretion if estrogen by ovarian cells. In males, FSH stimulates sustentacular cells, specialized cells in the tubules where sperm differentiate. Luteinizing hormone (LH) induces ovulation, the production of reproductive cell in females. Also promotes the secretion, by the ovaries, of estrogen and the progestin, which prepare the body for pregnancy. In male hormone is sometimes called interstitial cell-stimulating hormone (ICSH), because it stimulates the production of sex hormones by the interstitial cells of the testes. Prolactin (PRL) works with other hormones to stimulate mammary gland development. Growth hormone (GH) stimulates cell growth and replication by accelerating the rate of protein synthesis. The posterior lobe produces two hormones: Antidiuretic hormone (ADH) is released in response to a variety of stimuli, most notably a rise in the solute concentration in the blood or a fall in blood volume or blood pressure. A rise in the solute concentration stimulates specialized hypothalamic neurons. Oxytocin (OT) stimulates smooth muscles contraction in the wall of the uterus, promoting labor and delivery. After delivery this hormones stimulates the contraction of myoepithelial cells around the secretory alveoli and the ducts of the mammary gland, promoting the ejection of milk. Discussion the results of abnormal levels of pituitary hormones Abnormal levels of pituitary hormones can have a cast and complex impact on the growth, fertility, and function on the human body via the effect of the hormones on their target organs. Diseases anywhere from asthma to growth problems can occur. Identify the hormones produced by the thyroid gland, specify the functions of those hormones, and discuss the causes and results of abnormal levels of thyroid hormones. The thyroid gland produces thyroglobulin, tyrosine, and thyroxine. The functions of these hormones are: Thyroid hormones enter target cells by means of an energy dependent transport system and they affect almost every cell in the body. Thyroid hormones bound to cytoplasmic receptors are held in storage until intracellular levels of thyroid hormone decline. Thyroid hormones bound to mitochondria increase ATP production. Thyroid hormones bound to receptors in the nucleus activates genes that control energy utilization. The calorigenic effect: the cell consumes more energy resulting in increased heat generation. In growing children, thyroid hormones are essential to normal development of the skeletal, muscular, and nervous systems. The thyroid gland is primarily responsible for a strong, immediate, and short-lived increase in the rate of cellular metabolism. The major factor controlling the rate of thyroid hormone release is the concentration of TSH in the circulating blood. The causes of abnormal levels of thyroid hormones can create an iodide deficiency because in the U.S. we consume more than they daily amount needed. Thyroid hormone production declines, regardless of the circulating levels of TSH. Describe the functions of the parathyroid hormones, and the effects of abnormal functions of each hormone. Parathyroid hormone has four major effects: 1. It stimulates osteoclasts, accelerating mineral turnover and the release of Ca2+ from bone. 2. It inhibits osteoblasts, reducing the rate of calcium deposition in bone. 3. It enhances the reabsorption of Ca2+ at the kidneys, reducing urinary losses. 4. It stimulates the formation and secretion of calcitriol at the kidneys. The effects of calcitriol complement or enhance those of PTH, but one major effect of calcitriol is the enhancement of Ca2+ and PO43- absorption by the digestive tract. The parathyroid glands, aided by calcitriol, are the primary regulators of blood calcium I levels in healthy adults. When the parathyroid calcium levels become abnormal there are two disorders that can occur. Hypoparathyroidism the gland secretes low calcium concentrations in body fluid. Hyperparathyroidism is when calcium concentrations become abnormally high. Identify the hormones produced by the adrenal cortex and medulla and specify the functions of each hormone The adrenal cortex secrets the hormones adrenocortical, mineralocorticoids, glucocorticoids, and androgens. The adrenocortical steroids or corticosteroids are vital: if the adrenal glands are destroyed or removed, the individual will die unless corticosteroids are administered. Mineralocorticoids increase renal reabsorption of Na+ and water which accelerates urinary loss of potassium. Glucocorticoids release amino acids from skeletal muscles and lipids from adipose tissue; promote liver formation of glucose and glycogen; promotes peripheral utilization of lipids; anti-inflammatory effects. Androgens are not important in men; encourages bone growth, muscle growth, and blood formation in children and women. The adrenal medulla secrets epinephrine and norepinephrine. These hormones increase cardiac activity, blood pressure, glycogen breakdown, blood glucose levels; releases lipids by adipose tissue. Also this is where the fight or flight syndrome is sparked. Discuss the results of abnormal levels of adrenal hormone production When the adrenal hormone becomes abnormal it produces several different disorders. The first is hypoaldosteronism; the zona glomerulosa fails to produce enough aldosterone, generally either as an early sign of adrenal insufficiency or because the kidneys are not releasing adequate amounts of rein. A rare but serious disorder can occur called Addisons disease which results from inadequate stimulations of the zona fasciculata by the pituitary hormone ACTH or, more commonly, from the inability of the adrenal cells to synthesize the necessary hormones, generally from adrenal cell loss caused by autoimmune problems. Another disease is Cushings disease which results from overproduction of glucocorticoids. There is another aspect of abnormal production of adrenal hormones that affects men and womens sexual characteristics called adrenogenital syndrome. In women, this condition leads to the gradual development of male secondary sex characteristics, including body and facial hair patters. In male to causes an increase of estrogen resulting in larger breast tissue or other female secondary sex characteristics. Last but not least there is a disorder of the adrenal medulla called pheochromocytoma which is an overproduction of epinephrine that causes a tumor that produces catecholamines in massive quantities. Describe the functions of the hormones produced by the pineal gland. It contains pinealocytes, which synthesize the hormone melatonin. The suggested functions of the pineal gland is that it inhibits reproductive functions, protects against damage by free radicals, and sets circadian rhythms. Identify the hormones produced by the pancreas and specify the functions of those hormones. The pancreas contains both exocrine and endocrine cells. Cells of the endocrine pancreas form clusters called pancreatic islets (islets of Langerhans). The pancreatic islets release insulin and glucagons. Insulin is released when blood glucose levels rise, and it stimulates glucose transport into, and utilization by, peripheral tissues. Glucagon is released when blood glucose levels decline, and it stimulates glycogen breakdown, glucose synthesis, and fatty acid release. Discuss the results of abnormal levels of pancreatic hormone production. When the pancreatic hormones produce abnormal levels of insulin and glucose it causes an individual to be diabetic. Diabetes mellitus is characterized by glucose concentration that is high enough to overwhelm the reabsorption capabilities of the kidneys. Glucose appears in the urine, and urine production generally becomes excessive. Describe the functions of the hormones produced by the kidneys, heart, thymus, testes, ovaries, and adipose tissue. Control of the heart, kidneys, thymus, gonads, and adipose tissue. The kidneys release erythropoietin and calcitriol into the red bone marrow, intestinal lining, bone and kidneys. All of the hormones releases are to stimulate red blood cell production and calcium and phosphate absorption and it also stimulates calcium ions from bone; inhibits PTH secretion. The heart controls the hormones natriuretic that targets the kidneys, hypothalamus, and adrenal gland. These hormones increase water and salt loss at kidneys; decrease thirst; and suppress secretion of ADH and aldosterone. The adipose tissue contain two hormones that support to different functions, first is leptin which targets the hypothalamus for suppression of appetite; permissive effects on GnRH and gonadotropin synthesis. Second is resistin that targets cell throughout the body that suppresses insulin response. Last but not least are the gonads with the hormones androgens, inhibin, estrogen and progestin. All these hormones a re targeted by the pituitary glands to support the reproductive organs in males and females. In males the interstitial cells of the testes produce androgens. Testosterone is the most important sex hormone in males. Sustentacular cells in the testes support the differentiation and physical maturation of sperm. Under FSH stimulation, these cells secrete the hormone inhibin, which inhibits the secretion of FSH at the anterior lobe. The female body develops oocytes in the follicles; follicle cells produce estrogens, especially estradiol. After ovulation, the remaining follicle cells reorganize into a corpus luteum. Those cells release a mixture of estrogens and progestins, especially progesterone. Explain how hormones interact to produce coordinated physiological responses. Hormones interact to produce coordinated physiological responses in four ways: 1. antagonistic (opposing) effects 2. synergistic (additive) effects 3. permissive effects, in which one hormone is necessary for another to produce its effect 4. integrative effects, in which hormones produce different, but complementary, results Identify the hormones that are especially important to normal growth, and discuss their roles. Several hormones are especially important: GH, thyroid hormones, insulin, PTH, calcitriol and reproductive hormones. The circulation concentrations of these hormones are regulated independently. Changes produce unique individual growth patterns. Growth Hormone (GH): effects are most apparent in children where GH supports muscular and skeletal development. In adults GH assists in the maintenance of normal blood glucose concentrations and in the mobilization of lipid reserves. Thyroid hormones: if these hormones are absent during fetal development or for the first year after birth, the nervous system will fail to develop normally and mental retardation will result. If T4 concentrations decline before puberty, normal skeletal development will not continue. Insulin: without insulin the passage of glucose and amino acids across cell membranes will be drastically reduced or eliminated. Parathyroid Hormone (PTH) and Calcitriol: promote the absorption of calcium salts for subsequent deposition in bone. Without adequate levels of both hormones, bones will be weak and flexible. Reproductive Hormones: the sex hormones (androgens in males, estrogens in females) stimulate cell growth and differentiation in their target tissues. Differential growth induced by each hormone accounts for gender-related differences in skeletal proportions and secondary sex characteristics. Define the general adaptation syndrome. Any condition that threatens homeostasis is a stress. Our bodies respond to a variety of stress-causing factors through the general adaptation syndrome (GAS), or stress response. The GAS can be divided into three phases: 1. the alarm phase 2. the resistance phase 3. the exhaustion phase http://www.harford.edu/faculty/SSchaeffer/Endocrine%20Outline.doc http://www.miramar.sdccd.cc.ca.us/faculty/kpetti/Bio160/Martini7DetailLectOutlines/18-Detailed_Lect_Out_LO.pdf.pdf

50 Shades- Feminist Theory

Erica Freedman 1-24-2013 Feminist Theories in Intercultural Perspective- Hoffman The explosively popular 50 Shades of Grey series depicts Ana Steele, an aspiring young writer who quickly falls into the clutches of an extremely seductive and successful Christian Grey in a dominant/ submissive love story. Easily sweeping the young and restless girl off her feet, Grey’s confident and demanding presence starkly contrasts Ana’s who is known to self deprecate and hide behind plain clothing or a pile of books.From the onset it is clear that stereotyping Ana as frail and naive are what allow Christian to appear as the ultimate prince charming. Ana is initially depicted as independent: hyper-focused on a successful career in the literary world, the perfect daughter and the perfect student who has never had time for a boyfriend. Her best friend and roommate Kate is even more self-sufficient as the requisite foil with the outspoken personality and journalistic go-getter attitude. When Kate and Ana lose site of their goals due to the handsome pair of successful brothers, two gender aspects are highlighted.Kate’s strength is suddenly depicted as a mask that was disguising her truly feminine and love seeking qualities. Her priorities become completely disheveled and all she begins to desire is spending more time with her new infatuation. Ana grapples with a watered down battle of morality where she claims to feel immense discomfort in having an overpowering lover who can get her to do anything he wants, while still wanting to make her own way. This idea is consistently undermined by her actions throughout the story.For instance, after saving herself for the perfect person for twenty-two years, Ana is convinced to giver herself away in a one-night stand with Grey. Immediately past this point, Christian places Ana in a highly-controlled, powerless relationship where he stalks her, takes all of her time and insists on buying her things she supposedly does n ot desire–including a new wardrobe and a higher position in a publishing company that he decides to acquire a few weeks after she begins interning there.Anastasia is suddenly incapable of talking to one of her closest friends, Jose, because of Christian’s overwhelming jealousy. Ultimately, Anastasia caves to his wishes on that front as well. As sexually liberated and filled with love as Christian makes Ana feel, he also easily and quickly strips her of as much of her independence as he can. It is these traits that make the existence of their relationship possible. Without Ana’s willingness to adhere to Christian’s expectations and demands, she cannot have him, and so she does what is expected of her instead.