Malignant Hyperthermia Treatment Case Study

Malignant Hyperthermia Treatment Case Study In this scenario, there is a 35 year old female patient who develops malignant hyperthermia during surgery. Malignant hyperthermia is an uncommon pharmacogeneric disorder that leads to the hypermetabolic reactions of the skeletal muscle. [Ben Abraham, et al, 1998, Britt, 1985, Hopkins, 2008]. Age, type of anesthetic, environmental temperature, mitigating drugs administered simultaneously and degree of stress play an important role in triggering malignant hyperthermia. [Ording, 1985]. Primarily, potent inhalation anesthetic agents and depolarizing muscle relaxants such as succinylcholine are the major triggering factor amongst all the triggering factors. Malignant hyperthermia can happen at any time during surgery especially after the induction of the anesthetic and in the early postoperative period. Besides that, there is a tendency of the recurrent of malignant hyperthermia as well. Even though hypermetabolic reaction of skeletal muscle will cause hyperthermia and rhabdomyolysis but fever is not the earliest symptom of malignant hyperthermia. The earliest signs and symptoms of malignant hyperthermia are increase in the end-expired carbon dioxide concentration (EtCO2), tachycardia and muscle rigidity (especially when succinylcholine is given). [Britt, 1985]. Furthermore, the late sign of malignant hyperthermia is elevation of the body temperature. [Ali et al, 2003; Britt,1985].The other signs and symptoms are unstable blood pressure, tachypnea, hyperkalemia and arrhythmia. According to Hogan, 1998 the estimated incidence of malignant hyperthermia during anesthesia in North America and Europe is 1:15000 anesthetics for children and adolescents and 1:50000- 1:150000 anesthetics for adults. [Hogan, 1998].All ethnic groups are affected with malignant hyperthermia and males are more prone to be affected compared to female. [Britt, 1976; Hopkins, 2008]. The mortality was around 80% thirty years ago and has been reduced to less than 10% with the introduction of the muscle relaxant dantrolene sodium, widespread education and clinical and research investigation. [Ali, 2003; MacLennan, 1990] Malignant hyperthermia is an inherited disorder where the calcium channel that mediates the excitation contraction coupling in skeletal muscle is mutated. As a result, the calcium channel is very sensitive to the anesthetic agents [Hopkins, 2008]. This will lead to the uncontrolled release of cytoplasmic calcium from the sarcroplasmic reticulum upon the induction of anesthetic agents [Hopkins, 2008; Rosenberg et al. 2004]. As a matter of fact, there is a continued interaction between actin and myosin with sustained muscle contraction [Hopkins, 2008; Rosenberg et al. 2004]. The manifestation of the signs and symptoms of malignant hyperthermia can be explained by the increased release of the calcium. At first, this mechanism is compensated by the resequestion of calcium, which has lead to the breakdown of the adenosine trisphosphate (ATP) [Hopkins, 2008; Rosenberg et al. 2004]. This will cause the stimulation of the metabolism and results in increased oxygen consumption, heat and carbo n dioxide production. The breakdown of the ATP causes the release of the potassium into the extracellular fluid results in hyperkalemia and this will lead to the development of cardiac arrhythmias. Besides that, the continuous contraction of the skeletal muscle due to the breakdown of the ATP will lead to the further production of heat. As a result, there will be a further increase of oxygen consumption, carbon dioxide and lactic acid production, which, will lead to metabolic acidosis [Britt, 1985; Hopkins, 2008; Rosenberg et al. 2004]. In addition, the increase of the production of heat will also increase the contractility of the skeletal muscle hence further worsening the rhabdomyolysis process. If malignant hyperthermia is untreated, it might lead to vital organ dysfunction, acute renal failure, disseminated intravascular coagulation, congestive heart failure and even death. In this scenario, since the patient developed malignant hyperthermia during surgery, thereby the management of malignant hyperthermia can be divided into emergency treatment and postoperative treatment. When there is an acute development of malignant hyperthermia during surgery, all triggering agents have to be discontinued and the patient has to be hyperventilated with 100% oxygen to lower the end tidal CO2 immediately. This is followed by administration of 2.5mg/kg dantrolene sodium intravenously every 5 minute until the signs and symptoms of malignant hyperthermia are under controlled. [Morgan et al. 2006]. The dose of dantrolene can be titrated up to 10mg/kg. [Gronert et al., 1976; Harrison, 1988]. The monitoring of blood gases, all serum electrolytes, muscle enzyme such as cretine kinase, clotting profile, blood and urine for myoglobin, blood glucose, lactate and urea nitrogen must be carried out frequently during the surgery. Sodium bicarbonate should be given to correct the me tabolic acidosis to the normal level. In addition, patient has to be closed monitored and anti-arrhythmic except calcium channel blocker can be given for arrhythmias. Cooling measures have to be initiated if there is the present of hyperthermia. Ice packs to groin, axilla, and neck, cooling blanket, and nasogastric lavage with iced solution can be used to cooling down the patient. The cooling measures have to be stop if the body temperature is at 38.5oC. In order to treat myoglobinaemia and thus acute prevent renal failure urine output and urine pH should be greater than 3ml/kg/h and pH7 respectively. [Hopkins, 2008]. This diuresis can be achieved by hydrating the patient with crystalloid solutions together with mannitol (0.3g/kg) and furosemide (0.5-1.0mg/kg). [Hopkins, 2008; Mary, 1998]. Hyperkalaemia which is life threatening can be treated with glucose, insulin, intravenous calcium and intravenous potassium chloride. [Britt, 1979; Hopkins, 2008]. Once the surgery is finished, the patient has to be moved to intensive care unit or recovery room until malignant hyperthermia is under controlled and the patient should be monitored closely. Since it is possible for the recrudescence of malignant hyperthermia, dantrolene should be continued giving to patient for at least 48 hours. [Flewellen, 1983; Rosenberg, 2004]. Several laboratory tests such as blood gases, electrolytes, coagulation profile, muscle enzyme, blood and urine for myoglobin should be assessed more frequently. [Hopkin, 2008]. At first, besides dantrolene, procainamide/ procaine was recommended to treat malignant hyperthermia. The use of procainamide/ procaine was due to the successful studies carried out by Harrison, 1971, Denborough, 1972 and Noble, 1973. The study carried out by Harrison, 1971 showed a successful treatment of malignant hyperthermia with large dose of intravenous procaine in 2 out of 5 Landrace pigs. However, the study from Gronert, 1976 showed that the recommendation dose of procaine/ procainamide was ineffective in preventing malignant hyperthermia of the 20 susceptible pigs. Study compared the effectiveness of dantrolene and procainamide conducted by Nelson, 1979 showed that procainamide did not block the contracture response to halothane and it is ineffective for therapeutic and as prophylaxis of malignant hyperthermia. Procainamide or procaine was not been used after all. Harrison, 1975 demonstrated that dantrolene can relax muscle rigor in pigs with malignant hyperthermia and ceased the excessive heat and acid production. The study showed 100% survival rate in the last seven of eight experiments. Besides that, based on Britt, 1984 that 79 patients who received dantrolene therapy showed a significant 16.56% reduction in mortally (p Dantrolene is now the only known therapeutic agent used to treat malignant hyperthermia. Dantrolene is a diphenylhydantoin derivative that is highly lipid soluble but poorly water soluble. [PMJ GG Harrison]. Dantrolene can be administered by oral route or intravenous route. Roughly, 70% of dantrolene is absorbed with the peak plasma concentration reached in 6 hours following the ingestion of dantrolene by mouth. From the experiment performed by Harrison 1975, oral dantrolene was effective in treating procaine malignant hyperthermia. Nevertheless, there is a great variation in the plasma concentration for the oral dantrolene especially in children. Dantrolene is formulated as lyophilized orange powder, which comprises of dantrolene sodium, mannitol and sodium chloride. These contents are dissolved in water to yield a solution with the pH of 9.5 for intravenous injection. Moreover, the additional of the mannitol is to improve the solubility since dantrolene is poorly water soluble and mannitol also acts as diuresis, which prevent the deleterious effects of myoglobinaemia. The biological elimination half life of dantrolene is 12 hours. As a result, after 12 hours the plasma concentration of dantrolene will be 4.2ÂÂÂ µg/ml with the administration of 2.4mg/kg body weight of dantrolene intravenously. [Allen et al, 1988; Muehlschlegel Sims, 2009]. Dantrolene is mainly metabolized in the liver through oxidation and reduction reaction. Oxidation and reduction of the dantrolene result in the production 5-hydroxydantrolene and aminodantrolene respectively. Aminodantrolene will then undergo acetylation leads to the formation of reduced acetylated derivative of dantrolene. The metabolites of the dantrolene are excreted in urine and bile with 79% of 5-hydroxydantrolene, 17% reduced acetylated derivative of dantrolene and 4% of the dose is excreted unchanged in the urine. [Dykes, 1975; Lietman et al, 1974]. Moreover, it has been stated that the metabolites of dantr olene especially 5-hydroxydantrolene has some muscle relaxant activity. [Ellis Wessels, 1978; Ali et al, 2003]. According to Malignant Hyperthermia Association (MHAUS) the recommended dosage of dantrolene is approximately 2-3mg/kg. [Schulte-Sasse]. It had been stated by Flewellen Nelson 1980 that, 95% of the skeletal muscle of swine was depressed with the administration of 3.5mg/kg dantrolene intravenously. In addition, clinical study showed that administration of 2.4mg/kg of dantrole intravenously was able to depress 75% of the skeletal muscle in human. [Flewellen et al., 1983]. The dose was proved to be effective in the treatment of malignant hyperthermia.[ Hall et al, 1980; Kolb et al, 1982]. Thus, for acute malignant hyperthermia crisis, 2.4mg/kg of intravenous dantrolene is effective in life-saving of treating malignant hyperthermia. [Harrison 1988; Allen et al. 1988; Flewellen et al., 1983]. The single dose of oral dantrolene that is currently given to patient is 1-2mg/kg four times a day.[ Pandit et al, 1979; Fitzgibbons, 1981]. However, it was found that this recommended dose of oral d antrolene was not effective in preventing malignant hyperthermia in human. [Fitzgibbons, 1981; Flewellen et al, 1983]. Administration of oral dantrolene has been recommended before the operation and after the malignant hyperthermia crisis to prevent the recrudescence. Besides administration oral dantrolene, dantrolene can also be given intravenously as a prophylaxis therapy after the crisis. [Flewellen et al, 1983]. The prophylactic continuous intravenous dose of dantrolene is approximately 2.4mg/kg. [Flewellen et al, 1983]. Dantrolene is a muscle relaxant, which, acts on skeletal muscle cell to inhibit the release of calcium from sarcoplasmic reticulum. This will reduce the contractility of the skeletal muscle cell. According to Ellis,1973, the relaxant action of dantrolene acted directly and specifically on skeletal muscle but did not act on cardiac and smooth muscle. Besides that, dantrolene did not have any action on central nervous system. [Harrison,1988 Ellis, 1972]. Harrison and Chapman 1982, stated that the reduction in the amount and rate of calcium release by dantrolene is effective in preventing and reversing the pathophysiology of malignant hyperthermia in patient. In the experiment carried out by Harrison, 1975 has demonstrated that administration of dantrolene will cause a relaxation of the muscle rigor, cessation of the production of heat and acid. Based on the study carried out by Nelson, 1996 dantrolene is clinically effective in the treatment of malignant hyperthermia and showed a remarkable reduction in death and syndrome associated with malignant hyperthermia. When the syndrome of malignant hyperthermia was first noticed by the world during 60s, the rate of mortality was about 80%. The increasing awareness of syndrome with resultant in earlier diagnosis and treatment markedly reduced the mortality to 28% during 70s. With the introduction of the dantrolene, the rate of mortality reduced to 7%. [Harrison, 1988]. In addition, the experiment done by Harrison, 1988 showed that 100% survival rate was achieved with the administration of dantrolene. Long term administration of dantrolene orally is associated with some side effects such as hepatotoxicity and vomiting, which sometimes may be accompanied by diarrhea. [ Faling et al, 1980; Wilkinson et al, 1979]. However, the occurrence of hepatotoxicity is rare and several studies have been failed to prove whether hepatotoxicity is due to ingestion of dantrolene orally alone. [Flewellen et al, 1983; Dykes 1975; Durham et al, 1984]. As the reconstitution solution that is formulated for intravenous injection is highly alkaline, if extravasation occur it may irritate the vein which will lead to phlebitis and tissue necrosis. Therefore, dantrolene is recommended that to be injected into the large vein via a central venous catherter.[Ward et al, 1986; Muehlschlegel Sims, 2009]. Besides that, the mannitol that added to the dantrolene powder will cause osmotic diuresis with the loss of fluids and electrolytes. This will increase the risk of the patient who has poor renal function. [Bastro n,1983]. In addition, in the experiment that carried out by Flewellen and Nelson, chronic administered of dantrolene intravenously will result in difficulty in walking especially down stair. Muscle weakness lasting up to 48hours in 12 malignant hyperthermia subjects and associated with difficulty in walking, especially down stairs. [Flewellen Nelson,1983]. In the clinical studies that performed by Flewellen and Nelson and Oikkonen and his colleagues, patients were experienced fatigue and difficulty in swallowing accompanied to the long term administration of continuous intravenous dantrolene.[ Flewellen Nelson, 1983; Oikkonen et al, 1987]. The other common side effects of administered of dantrolene are dizziness, light-headedness, drowsiness, weakness, malaise and nausea. [Ward et al, 1986; Dkyes, 1975]. There is an adverse interaction of dantrolene when co-administration with verapamil. Co-administration of dantrolene and verapamil will cause hyperkalaemia and depression of the cardiac contractility. [Rubin Zablocki,1987; Saltzman et al, 1984]. The studies carried out by Lynch and colleagues and Saltzman and colleagues stated that administered dantrolene and verapamil concomitantly will cause remarkable hyperkaelemia and cardiac depression in dogs and swine. [ Saltzman et al, 1984; Lynch et al, 1986]. However, not all the calcium channel blockers will cause hyperkaleamia and the depression of cardiac contractility. Neither nifedipine nor amlodipine has significant of hyperkalaemia and depression of cardiac contractility when given together with dantrolene. [Freysz, 1996; Saltzman et al, 1984]. Besides having adverse effects and adverse interaction, another disadvantage of dantrolene is its cost. Dantrolene is an expensive drug, for intravenous dantrolene, it costs ÂÂ £15.08 per 20mg vial. As it is a huge amount of dantrolene are needed for immediate use, this has became an issue for some hospitals when purchase the dantrolene as dantrolene is very expensive especially intravenous dantrolene and dantrolene has a limited shelf life of 18 months to 2 years. [Allen et al, 1988; Hall, 1980]. In conclusion, malignant hyperthermia is uncommon life-threatening inherited disorder of the muscle cells. A sudden hypermetabolic reaction of the skeletal muscle when exposed to potent volatile anaesthetics and depolarizing muscle relaxants such as succinylcholine will endanger the patient by causing hyperthermia and massive rhabdomyolysis. Studies showed that appropriate dose intravenous dose of dantrolene is effective in treating patient during acute malignant hyperthermia crisis. Thus, 2.4mg/kg of dantrolene should be given intravenously during acute malignant hyperthermia crisis and continue giving 2.4mg/kg dantrolene after the crisis for 48 hours to avoid recrudescence of malignant hyperthermia. Besides, hypermetabolic reaction and the mortality rate of malignant hyperthermia can be reduced by taking precautions and increasing the awareness of patient who is malignant hyperthermia susceptible. With appropriate counseling, pre-operative screening and intraoperative monitoring th e vital signs and symptoms of malignant hyperthermia can prevent the potential lethal complications arise.

Dentralization: Pros and Cons :: Organizational Structure

When it comes to decentralization, there are many pros and cons. Decentralization can be beneficial in the fact that it allows for experts to take control of specific functions of an organization and easily convey information back and forth. It also allows for direct contact and relationships with managers. Decentralization also allows managers to participate in planning.   Ã‚  Ã‚  Ã‚  Ã‚  Unfortunately, there are disadvantages of decentralization as well. Some managers will find that they have too much work to do and other will have too little. It will also become difficult to have managers take on different tasks or projects if needed because of overspecialization. Also, if one manager leaves, there will not be anyone to pick up his place with quite the same knowledge and expertise.   Ã‚  Ã‚  Ã‚  Ã‚  Centralization is another method which has its pros and cons. A positive aspect is the fact that the corporate decision maker has full control over the organization and the decisions that the organization must follow. The organization may also benefit from the fact that all information is reported to the corporate decision maker; he or she listens to all comments and concerns and is able to infer from all information received.   Ã‚  Ã‚  Ã‚  Ã‚  There are disadvantages to centralization as well. The larger an organization becomes, the more information that one manager has to comprehend and consider; eventually he/she will need help. Tasks will have to be divided or else the organization will become disorganized and at times, seem chaotic. What happens if the manger is away for whatever reason?

Stephen Cranes The Monster as the Most Important work of short fiction

â€Å"At once a children’s tale, a grim social satire, an ambitious study of ethical responsibility, a painful examination of race in America, a devastating account of the village virus†¦Ã¢â‚¬  â€Å"The Monster† by Stephen Crane, has been interpreted as the most significant work of short fiction written before 1900. It is a compilation of different issues used to highlight the racist attitudes and xenophobia evident in the USA after slavery was abolished in 1863. Despite the fictional plot, the views of the white population of Whilomville are based on fact, as the racist feelings were still palpable evinced by derogatory terms such as â€Å"Negro†. Along with the race struggle, social satire is apparent, as evidently the story is classified as Southern Gothic. With a Gothic overtone Crane is able to explore the satirical society in which the story is set, to delve into concerns of social satire, ethical responsibility, race struggles and the â€Å"village virus†. Throughout â€Å"The Monster†, Crane exemplifies the social hypocrisy and identifies this as an issue in contemporary society. Before Henry became â€Å"frightfully seared†, he was high in social status. This is portrayed through descriptions of the towns-people of Whilomville, which is place loosely based on Crane’s childhood hometown of Port Jervis, New Jersey. He was a â€Å"well-bred gentleman†, who was constantly given â€Å"quiet admonitions and compliments†. Miss Bella Farragut exclaimed that â€Å"Misteh Johnsing† was simply â€Å"divine†, as they were soon to be engaged. Their opinions though, were greatly reversed after the fire incident, when â€Å"his face had simply been burned away†. When Alek, his â€Å"ol’ frien’†, first saw Henry after the accident, he â€Å"gasped for a second, and then â€Å"yelled the yell of... ...o mock and ridicule Henry, by chasing him, â€Å"firing rocks†. Similarly, hierarchy is central to society. There is a reversal in the social ladder, as Henry was a dominant figure, but after the incident this was overturned due to his appearance. However, it is ironic as Henry’s deed is the indisputable act, as he does not criticise others, and he performs the act of ultimate kindness – jeopardising his own life to rescue Jimmie from the fire. â€Å"The Monster† is depicted as the most significant work of short fiction written before 1900, primarily because Crane has used the Southern Gothic subgenre, in order to accumulate an abundance of issues such as racism and the â€Å"village virus†. Crane exploited small-town experiences to illustrate the flaws in the community, to present a microcosm and a warning for the readers, to deter them from becoming the ostensible monsters.

community responsibilities :: essays research papers

Do you believe that our community should have leaders, or do you believe that everybody should be truly equal in our environment? The United States is living in an environment where there is a small group of leaders that make decisions for everyone else. When you hear somebody say they are going to make decisions for you, you might be thinking you would have to tale that decision no matter what. Well, that’s wrong, there is still an opportunity on weather you have to take the decision or not. There are votes, when you vote you either agree of disagree with any decisions. If there were more people that disagree than there were people that agree, then you were left with what you wanted. You still had the opportunity to choose what you wanted. Being with a group of leaders to make decisions for a society doesn’t necessarily mean that you would have to take the decision. No matter what you still have the chance to decide. A group of people needs to be over others to help g uide and make decisions because with no leader everything would be out of control, everybody’s decisions would not be heard, and a group with no leader would never be efficient. A group of people needs a leader because without a leader everybody would be out of control and nobody would be able to deal with them. Without a leader not everything would be controlled. Anybody in a society with no leader would not know what he or she is doing. They won’t know what doing because there is not one decision maker that has good reasons for those decisions. Groups of people would gather around making chaos about everything. Some people make chaos and act wild because they don’t have a leader to till them what is right and wrong. People would be wild because they wouldn’t be controlled and it is impossible to get a big group of people together at the same time to be dealed with. Being out of control is not the only problem with being equal, but everybody’s decisions would not be heard. Without having a leader not everybody’s decisions or opinions would be heard. A group of people or society always needs a leader so everybody’s decisions would be heard. Without a leader there would not be much communication. If a person comes up with a good decision or idea that person would not be able to let the whole society know about his or her ideas. community responsibilities :: essays research papers Do you believe that our community should have leaders, or do you believe that everybody should be truly equal in our environment? The United States is living in an environment where there is a small group of leaders that make decisions for everyone else. When you hear somebody say they are going to make decisions for you, you might be thinking you would have to tale that decision no matter what. Well, that’s wrong, there is still an opportunity on weather you have to take the decision or not. There are votes, when you vote you either agree of disagree with any decisions. If there were more people that disagree than there were people that agree, then you were left with what you wanted. You still had the opportunity to choose what you wanted. Being with a group of leaders to make decisions for a society doesn’t necessarily mean that you would have to take the decision. No matter what you still have the chance to decide. A group of people needs to be over others to help g uide and make decisions because with no leader everything would be out of control, everybody’s decisions would not be heard, and a group with no leader would never be efficient. A group of people needs a leader because without a leader everybody would be out of control and nobody would be able to deal with them. Without a leader not everything would be controlled. Anybody in a society with no leader would not know what he or she is doing. They won’t know what doing because there is not one decision maker that has good reasons for those decisions. Groups of people would gather around making chaos about everything. Some people make chaos and act wild because they don’t have a leader to till them what is right and wrong. People would be wild because they wouldn’t be controlled and it is impossible to get a big group of people together at the same time to be dealed with. Being out of control is not the only problem with being equal, but everybody’s decisions would not be heard. Without having a leader not everybody’s decisions or opinions would be heard. A group of people or society always needs a leader so everybody’s decisions would be heard. Without a leader there would not be much communication. If a person comes up with a good decision or idea that person would not be able to let the whole society know about his or her ideas.

Pumps & Physics Essay

What’s new? When I was thinking about which aspect of physics to investigate for my investigation, I knew it was a good idea to choose something that really interested me. At the time I was becoming more and more fascinated by subatomic particles. I liked the fact that much of it was new and not understood properly, unlike the classical physics that everyone associates the subject with. Unfortunately, high energy physics does not translate into good practical coursework. However, while reading Six Easy Pieces, a book adapted from Richard Feynman’s famous textbook The Feynman Lectures on Physics, I noticed that a very common everyday phenomenon is still not properly understood by physicists. Encouraged by the prospect of discovering something new, I read on. Chaotic ideas Feynman wrote (on page 66) â€Å"There is a physical problem that is common to many fields, that is very old, and that has not been solved†¦It is the analysis of circulating or turbulent fluids†¦No-one can analyse it from first principles† â€Å"Wow – something science can’t explain† I thought. I looked on the internet for further details and I found a poster from World Maths Year 2000 (http://www.newton.cam.ac.uk/wmy2kposters/march/), showing just the type of unpredictable fluid motion that Feynman was writing about. It’s a new and exciting branch of maths called chaos theory and it is just beginning to be understood mathematically. The main idea is that simple systems can show very complicated behaviour that seems to have no repeating pattern. The sums that describe these systems are difficult to get your head round and appear to be way beyond my abilities as an A-Level maths student. Despite this, I felt something chaotic was an excellent phenomenon to look into for this task – it’s a chance to do some experimental work where there isn’t a perfect formula or a flawless explanation in any textbook. I couldn’t rely on distorting my results to fit a simple law, so my experimentation had to be rigorous. Limitations It was important to find a subject that was practical to investigate at school. While I was watching water swirl down the drain as I filled the kettle at home, I wondered how widely-used machines like ship’s propellers cope with the unpredictable world of chaos. Propellers have an unusual and distinctive shape designed to reduce turbulence. I wanted to investigate why this particular shape works so well – and if it can tell us anything about turbulent flow. Conveniently, water and propellers are easy-to-use in school labs (or so I thought!). Best of all, I thought, if I could model the situation but ignore the effect of turbulent water, I could look at the mechanics of the propeller, and then compare the theory with what happens in real life. It seemed like a good mix of fresh ideas and traditional physics problems. I talked about my plans to some of my teachers and one of them mentioned that his son had done a PhD degree in the formation of bubbles by marine propellers – an effect called cavitation. This encouraged me to continue with this project, knowing that it relates to current areas of research and is an important and worthwhile topic. Research It turns out that one of the most interesting applications of pumps is in fire engines. As fire services are public organisations they make available plenty of high-quality, free information online. Engineering sites were also useful. * The Physics Behind Firefighting American high-school physics project http://ffden-2.phys.uaf.edu/212_fall2003.web.dir/Matt_Taylor/Matt1.dwt * How Fire Engines Work General information http://science.howstuffworks.com/fire-engine.htm * Bedfordshire & Luton Fire and Rescue Service My local fire brigade, who I actually went to visit to find out more http://www.bedsfire.gov.uk/index.htm * American Turbine: Pump Calculations Web-based program for working out quantities in pumping http://americanturbine.net/formulacalc/pump.htm * Impeller Design The engineering that goes into pumps http://homepage.mac.com/mrbach/mixdesign.htm * Firefighting.com Useful data on pumps but uses frames so I can’t give a full URL http://www.firefighting.com * How Things Work A simple explanation of propellers and aerofoils Lesley Firth, Kingfisher, 1983 p13 * The Physics of Firefighting Some simple principles explained Physics Teacher, vol 28, p 599 * Firefighting Contains a bit of physics but interesting background information Jack Gottschalk, Dorling Kindersley, 2002, ISBN: 0789489090, p128 * Go with the flow Article about modelling granular and fluid motion New Scientist, 2 August 2003, p38-39 Preliminary Experiments I wanted to find the most efficient propeller design. From research I found out that propellers have different shapes for different tasks, so my first goal was to get a propeller up and working, and then look at what I could change to make it run more efficiently. These are the variables I aimed to evaluate for their effect on power transfer efficiency in preliminary tests: * The speed of rotation * The size of the propeller * Since speed of rotation is less time consuming to collect data for, I’ll look at it first. I intend to plot a graph of speed of rotation vs. output flow rate. Considering the shape of a ship’s propeller, I expected to be looking at these variables later on: * The number of blades on the impeller * The shape of the blades * The orientation of the blades (what angle they are in relation to the axis of rotation) The physics principles that are important here are mechanical ones. The efficiency of the propeller depends on how much of its power goes into pushing water outwards and how much is wasted on heating the water up or causing it to form whirlpools. New Scientist’s article Go with the flow mentioned the Bernoulli Effect, which is observed on aircraft wings and on propeller blades. Lower pressure Higher pressure A blade with a curved plane and a flat plane forces some air or water on a longer route over the curve, and the rest takes the shorter flat route. The longer journey over the curved plane causes a drop in pressure, which translated to lift in planes, and thrust in propellers. According to all the textbooks, the optimum number of blades, the blade angle, the speed of rotation and the size of propeller all contribute to the efficiency. It seems like I’ve got my work cut out for me. I’m going to concentrate on rotation speed and its effect on water flow rate outwards. Let’s see what the preliminary tests show. Water flows in Axle Propeller Watertight casing Water flows out Planning Risk Assessment1,2 Apparatus or procedure Hazard Precautions All apparatus Accident or fire Supervise the experiment at all times and clear away at the end of the session. Store all equipment safely and securely. Boiling water for shaping polypropene propellers Risk of scalding Take care with boiling water, paying attention at all times. Stand well back from the saucepan and do not move it while the water is hot. Use a heat-insulating towel to manipulate the hot polypropene. Electric circuit in general Risk of fire from short circuiting etc. Use insulated wires, keep connections clean and dry, and always supervise the apparatus while current is flowing. Do not leave the set-up unattended without unplugging the mains supply. Use wires of appropriate diameter to prevent overheating resulting in fire. Rapidly rotating propeller Possibility of injury from contact with rotating blades of propeller Leave motor switched off until ready to record data. Take care to keep your distance from the propeller, especially fingers. Heavy equipment (power pack, retort stands) Falling equipment could injure Ensure stands etc. are sturdily placed and avoid placing equipment near the very edge of the work bench. Power pack Output: 13V 5A DC Input: 230V mains AC Risk of electrocution from mains input (risk of injury from output voltage is minimal) Keep power pack away from the wet part of the apparatus (to prevent conduction through water). In my experiment, I will keep all the electrics on a shelf above the level of the water-containing apparatus. Ensure all water-containing equipment is as waterproof as possible, and have towels to hand to soak up spills. Do not leave the set-up unattended without unplugging the mains supply. Preliminary findings In the research and rationale section, I identified variables I wanted to investigate. I conducted preliminary experiments to found out which variables were the most practical to focus on. The basic aim is to narrow my search down to one or possibly two variables and then find the most power-efficient value for each variable. Size of propeller was very difficult to control since I found that the propeller will only stir the water unless it tightly fits the container. Small propellers did not displace any water. Only propellers with a diameter 1 or 2mm less than the diameter of the container were effective in pumping water. As such, I decided not to consider investigating this variable. Angle of propeller blade inclination is possible to vary, but I found the range of angles possible with the materials I had chosen were too limited. I developed a method of cutting out rectangles of polypropene sheeting, boiling them in water and bending them to the right shape, but the blades often snapped and it was tricky to get the blades to remain at the chosen angle as they cooled and hardened. I decided to keep blade inclination constant. 45à ¯Ã‚ ¿Ã‚ ½ might seem to be an appropriate angle of inclination to choose for all the propellers I will compare, but most propellers I found photographs of from my research showed shallower angles of blade inclination. I have decided that all my propellers will be inclined at 30à ¯Ã‚ ¿Ã‚ ½ because it is easier to make the propellers this shape and I assume that this is a more efficient angle than 45à ¯Ã‚ ¿Ã‚ ½ since many propellers are about this angle. Speed of rotation turned out to be very simple to control with the use of the variable voltage power pack. I investigated the effect of power input on rotation speed (or angular velocity of the propeller as I call it from here on in). Using a stroboscope, I determined the linear relationship between the voltage supplying the motor (V) and the angular velocity (?) of the propeller shaft in air. I adjusted the frequency of the strobe light until the propeller appeared not to rotate. At this frequency, the time between flashes of the strobe and the time for one blade of the propeller to reach the former position of the blade before it is equal. If you find the angle in radians (?) between two adjacent blades and multiply it by the frequency (f) of the stroboscope (the time between flashes), you are left with the angular velocity (?) of the propeller, i.e. the rate of rotation. ? = ?f In the table below, V and f were determined experimentally and ? was calculated by multiplying f by ?. Since the frequency is only known to two significant figures, the angular velocity can only be determined to 2 s.f. Angle between blades, ? degrees 72 Angle between blades, ? radians 0.4? V V 0 2.25 4.25 6.25 8.75 10.00 13.00 à ¯Ã‚ ¿Ã‚ ½0.25 f s-1 0 13 26 36 50 57 74 0.5 ? rad s-1 0 16 32 45 63 72 93 0.5 Once the propeller is immersed in water the relationship between ? and V changes. The relationship is non-linear and, unlike the graph above, is different for every propeller. In light of the preliminary experiments I will modify this method to vary the power supplied to the drill that drives the propeller. It will not matter that the speed of rotation varies depending on how much the water resists the motion of the propeller. The only data that are needed to calculate the efficiency of the system are power input and useful power output. Efficiency At this point it is important to mention that I am concentrating on the efficiency of the propeller at displacing water. Percentage efficiency = useful power output / power input à ¯Ã‚ ¿Ã‚ ½ 100%, or rewritten in symbols, ? = Puseful out / Pin. Also, power input is proportional to input voltage since current is constant at 5 A in my equipment. P = VI and I = 5   Power (Watts) = 5 x voltage (Volts). Review of purpose of investigation The focus of this investigation is to determine the optimum number of blades for a propeller to have to maximise energy-efficiency. Experiments will compare propellers with 2, 4 and 6 blades. The energy efficiency of the three propellers when displacing water will be determined and compared. Their efficiency may not be independent of the rate of rotation. This too will be investigated and analysed. The analysed results will show which of the three propellers is most energy efficient in at each rate of rotation investigated. Extract from Eric Weisstein’s World of Physics http://scienceworld.wolfram.com/physics/Screw.html A screw is a simple machine that is actually a version of the inclined plane. The pitch of the screw corresponds to the inclination of the plane: a higher pitch (i.e., more threads per length) means less inclination, and thus easier turning, but also more turning that needs to be done to travel a given length. As with the other simple machines, the required force is reduced, but the amount of work done is the same. Apparatus 13V max. variable voltage power pack Retort stands and clamps 15 cm ruler Silicone polymer window sealant Garden hosepipe Expanded polystyrene for supports Multimeter (0.25V, 0.25A tolerance) Polypropene sheet for making propellers PET lemonade bottles (2 Litre capacity) Plastic funnel for filling Stopwatch Collection bottle with 2 litre mark ( 0.002 L) Cordless electric screwdriver/drill Steel axle Volumetric burette PET pudding basins to contain propeller Water Colour-coded wires and crocodile clips Saucepan, hotplate and tongs for heating and reshaping polypropene into propellers Scissors and craft knife for cutting out propeller shapes from polypropene sheet Apparatus set-up These diagrams show how I designed the equipment. The circuit diagram connected to the drill represents the power pack, and its voltage selector is displayed as a variable resistor. The plastic volute is the container that houses the propeller. To begin with, water fills the water tank and the plastic volute. Activating the power pack supplies an electric current to the drill, which rotates the propeller. Variables to control Variable How I will control it Viscosity of water Constant at constant temperature and pressure Power and speed of rotation of propeller Use a power pack instead of a battery to supply the cordless drill. Use the same power pack, axle and drill throughout the experiment. Rotation speed does not vary linearly with power but carefully designing the experiment can avoid problems. Room temperature and pressure Constant at 20à ¯Ã‚ ¿Ã‚ ½C due to central heating. Atmospheric pressure changes are insignificant to this experiment. Plan for laboratory sessions Session and duration Targets Before lab work begins Build the waterproof sections of the apparatus and seal them with silicone polymer. Buy a cordless drill. First two hours Set up all apparatus, construct the propellers and test the experiment to ensure it works as planned Second two hours Measure the time taken to raise 2 Litres of water through 50cm vertically by each of the three propellers, with 65W power input Third two hours Repeat the previous session’s experiment, but with the power set at 35W. Fourth two hours By considering the results collected before this session, decide which range of power input to investigate in detail Fifth two hours Continue gathering results for chosen range of power inputs Remaining time Investigate turning points and anomalies as necessary In between lab sessions Complete results tables, draws graphs as appropriate and start to analyse findings. Use analysis to modify strategy and to make decisions on how to progress. While I was designing which equipment to use and how to use it, I thought carefully about accuracy and sensitivity. The major difficulty with this experiment is the unpredictable nature of the propellers – unlike many other things physics, it is not easy to find a good estimate of what will happen in textbooks or online. One way of ensuring good results is to measure the variables to a reasonable number of significant figures. The multimeter I chose to use is quick to respond to changes in current or potential difference and has fine graduations on its scale, providing high sensitivity. It also has very tight tolerances as it is designed for use in high performance electronics, which contributes to the accuracy of the results I will gather. The multimeter is significantly more accurate and sensitive some of the digital alternatives at school. It responds to changes much quicker too. I have had to design and build quite a large amount of equipment just to make this project possible. To measure the volume of water pumped out by the system, I will calibrate the water collection bottle with graduations. To make sure they are very sensitive and accurate, I will use the high quality, high accuracy laboratory glassware available at school for use in chemistry and biology. The percentage error on the volume graduations on these pieces of equipment is very small (around 0.0003%). References for planning section 1. Cambridge University Department of Physics Physics risk assessment form http://www.phy.cam.ac.uk/cavendish/hands/forms/RAform.pdf 2. CLEAPSS Secondary Schools website http://www.cleapss.org.uk/secfr.htm Implementing Modifications to plan Problem Solution How to water-seal the entire system Careful application of silicone sealant and gaffer tape at all junctions. Apparatus tested underwater by pressurising with air using a bike pump. Leaks located by bubbles escaping where seals were incomplete. How to get water to flow from the water reservoir into the propeller cavity, without providing any extra pressure that would reduce the workload of the propeller Height of water reservoir bottle adjusted until water just reaches the top of the propeller cavity, without spilling out the output hole How to accurately measure the volumes of water used in each experiment Volumetric glassware borrowed from chemistry department Calculation of power efficiency of pumping system ?E = mg?h P = Et-1 Useful power output = power spent on raising water against the force of the Earth’s gravitational field Useful power output = (mass of water raised (mwater) à ¯Ã‚ ¿Ã‚ ½ strength of gravity at sea level (g) à ¯Ã‚ ¿Ã‚ ½ height through which the water is raised (?h)) / time taken (t) Pout = mwaterg?ht-1 The mass of water is proportional to its volume at constant temperature and atmospheric pressure. In these experiments, the temperature and pressure have been constant at 293K (20à ¯Ã‚ ¿Ã‚ ½C) and 105 Pa respectively. Under these conditions, water has a density of 998.2 kgm-3 (according to the Nuffield Advanced Science Data Book, Nuffield-Chelsea Curriculum Trust, Longman, 1984). Therefore, the time taken to raise the water and the number of blades on each propeller are the only variables in my experiment.

How revolutionary was the American war Essay

The American war of independence was also known as the American revolutionary war. This war was fought between the American colonies and England. The war itself started with the battle of Lexington and concord. It started when some soldiers of the British army arrived in Lexington, Massachusetts. Over there, they fired at the colonial militia which it was a group of farmers, boys as well as old men. Then on the following day they headed to Concord and over there they killed some Americans. Thus, this was the first engagement of battle of the revolutionary war. The broader sense of the revolution began when parliament started to impose laws and regulations to the colonies. For instance, After the French and Indian war was over, Britain turned its attention to the colonies. They restricted the colonies to trade with other nations. Thus trough the navigation act the colonies were allowed to trade only with England. So goods such as sugar, tobacco, and cotton that were produced in the colonies could only be exported to British ports. Indeed, these rules and regulations ended up restricting the colonist’s life and freedom Other laws that they impose on the colonies included taxes. Since the French and Indian war had put England in a lot of debt, they decided to raise the taxes. Then In 1764, England passed the Sugar Act, which was used to raise money from the colonies. Moreover, â€Å"The Stamp Act passed by England in 1765, placed taxes on everyday items such as newspapers, legal documents, and even playing cards† (Divine 135). Furthermore, England did not even consider the thoughts of the Americans when they tried to have soldiers enforce British taxes and acts. The colonists felt that they were treated unfairly so they called for a meeting to protest the tax. So, representatives from nine out of the thirteen colonies came to this meeting. â€Å"The colonists drafted petitions to parliament that stated no taxes should be imposed on them, but with their own consent, given personally, or by their representatives† (Divine 136). Besides, they felt that the stamp act was improper because Am ericans were not represented in parliament. But still, the British went behind their own law which is â€Å"no taxation without representation† (Divine  132) and still taxed the colonies anyway. In return, the colonists imposed a voluntary boycott of British goods until parliament repealed the stamp act. So, it was obvious then, that the British were not treating the Americans equally like their own citizens in England. So I think that it was these inequalities that also lead to the decision to declare independence from the British rule. In addition, the â€Å"Townshend Acts came and it also taxed glass, paper, tea and lead.†(Divine 140) Therefore, the colonies refused to pay. In fact, it didn’t seem logical then that the colonies were regulated and tax by a government from so far away. Eventually, the Americans realized that the only way for them to retain their rights was to have political freedom from England. So they wanted independence from England. But unfortunately, the British strongly opposed letting the Americans be free. Therefore, it created many conflicts between the Americans and the British especially the soldiers. Indeed, all of these conflicts led to the revolutionary war. Finally, when America decided to declare its independence and go to war, it was a sign of radical action. Britain’s army was bigger and consisted of well trained and experienced soldiers. Americans, on the other hand, had soldiers who were poorly trained and equipped. But that didn’t stop them. They were determined to go to war anyway in order to change the rule of the nation. As a result they were able to break away from British rule. Thus the revolutionary war had a greater impact on the colonies and involved more than their independence. A new view of government was created that the world had not seen before. Democracy for the first time was implemented in a government and its authority was based on individual rights rather than from a king or church. Furthermore, the revolution changed the American society in some ways. For instance, after the war the American people denounced such English titles like esquire from the names of wealthy people. They also lower the amount of land that they needed in order to vote. Even though the American Revolution brought some change, other things were still the same. For instance, the distribution of wealth in America was still uneven Thus, â€Å"the sudden accumulation of large fortunes by new families made other Americans sensitive to aristocratic display†(Divine 163) Moreover, women were not allow to vote and it took a long time for some slaves to be free or  to be treated as equals. Thus the revolution did not bring about a big change of American society, at least not in the short term. But, â€Å"republicans such as Samuel Adams and Thomas Jefferson raised issues of immense significance for the later history of the United States. They felt that equality was essential. â€Å"Even though they failed to abolish slavery, institute universal manhood suffrage, or apply equality to women, they articulated a set of assumptions about people’s rights and liberties that challenge future generations of Americans.†(Divine 168) Reference: America past and present, volume I, Divine Breen and Fredrickson Williams, copyright 2002 http://encyclopedia.thefreedictionary.com/American%20Revolution http://www.kusd.edu/schools/lance/platinum/banaszynski/revolution/patriot_links_2003/taxes_taxes_taxes.html

Bonnie Parker

Bonnie Parker is a beautiful young woman obviously thirsty for a life more exciting than the one she leads. One dusty morning, she catches Clyde Barrow, handsome ex-convict, looking like he was about to steal her mother’s car. She is a struggling waitress, hungry to make something out of herself while he is a small-time professional criminal from Texas who decides to begin a new career as a bank robber. After a flirtatious banter took place between the two of them, Clyde confesses that he is an armed robber.Bonnie then dares him to commit an armed robbery right then and there, in broad daylight and right smack on main street. Incredibly, he complies. What ensues then is a coming together of two kindred spirits as Bonnie becomes Clyde’s main accomplice in the robbing and killing spree that ensued right after. They slowly form a group, eventually known as the ‘Barrow Gang’ consisting of a gas boy attendant, Clyde’s brother Buck and Buck’s demure wife, Blanche. C. ANALYSIS When one consciously bears in mind the spirit of the time in which Bonnie and Clyde was released, appreciation for this film doubles.It truly was an artistic form of rebellion; a type of rebellion that reflected the progressing times. The sixties was truly a dynamic period that gave a new direction to women’s empowerment. Gledhill articulates the underlying logic of film when she said that, â€Å"melodrama deals with what cannot be said in the available codes of social discourse; it operates in the field of the known and familiar, but also attempts to short-circuit language to allow the ‘beneath’ or ‘behind’— the unthinkable and repressed—to achieve material presence.† The film is actually all about identity and the conflicts that occur when such identity is found outside the bounds of acceptable behavior imposed by society and policed by the state. A testament to the fact that the film cuts across man y issues and opens up new frontiers in terms of film presentation is how cross-cutting its genre is. It can be filed under action-adventure, romance, gangster, crime and drama; it is perhaps more than what was just mentioned. And just like it’s genre, the film cannot be pigeon-holed into one neat category, much like its characters.While both Bonnie and Clyde cut interesting personalities, one cannot be discussed without the other. In terms of female empowerment, Bonnie does present an interesting role model. A murderous thief if rarely seen as good idol material; however, if one looks past the fact that her choice of ‘career’ is immoral by any standard, she is brave enough to break the mold of women’s role at the time. Scene after scene, she rubs her nose against the norms that society dictates for women. â€Å"Ever since the 1960s, the women’s movement has been concerned with media portrayal of women.Major studies of the most pervasive medium, tel evision, and particularly its commercials revealed the same subordination of women we saw in film. In commercials, most voice-overs were done by men and overall, men were featured more often than women. The women who were featured were limited to family roles. Women were shown doing housework and men were the beneficiaries of their work. On the other hand, men were employed, had careers, and were doing something outside the home. † This portrayal of women in the film is quite apparent and much more recognizable given the fact the Clyde was made less ‘manly’.It is indeed quite interesting how the writers and director presented the film: the female is a strong character that displayed very ‘male’ characteristics (albeit in a very sexy way) while Clyde’s masculinity is put on a chopping block with his sexual impotence. Whether or not this sexual incapability is accurate in terms of the real Clyde Barrow is irrelevant. What is significant here is t he importance found by the filmmakers in making Clyde less ‘masculine’ or atleast what society perceives as masculine.Initially, the director suggested that Clyde’s character be homosexual but when Warren Beatty refused to play a homosexual man, they decided that impotence would give the same ‘castrating’ effect to Clyde Barrow; an effect that inevitably led to the ‘masculinization’ of Bonnie Parker. This ‘castration’ of the main male character furthered strengthened Bonnie’s character. Furthermore, the other male characters are either dimwitted (C. W. Moss) or simpleminded and ignorant (Buck Barrow). It was as if the creation of the other male characters had for a goal to make Bonnie—and in consequence, women—look better and appear smarter.At this juncture, it would be quite interesting to ask oneself if Bonnie truly is a picture of female empowerment or is she merely a case of making a woman more male? Bonnie’s character finds its anti-thesis in Blanche (Buck’s wife). Blanche is the stereotypical female of the sixties. She is demure, conservative and relies on her husband for everything. Buck’s chauvinistic comment—It’s the face powder that gets a man interested; it’s the bacon powder that keeps a man at home—paints only two roles for women: as housekeepers and as sexual objects.Bonnie breaks this mold and carves another role for herself—a partner. In many ways, Bonnie represents what women can be if only they dared and Blanche represents what they are. â€Å"This dual recognition—how things are and how they are not—gives popular culture much of its strength, suggesting the way it may be drawn to occupy gaps in political, ideological and cultural systems and how the subordinated may find a negotiable space in which certain contradictions and repressed desires are rehearsed.† According to Arthur Penn, the film’s director, â€Å"Violence is one of the most powerful themes in Bonnie and Clyde. The central point is that crime and violence are interrelated; that one can not exist without the other (†¦) Once the match of violence is lit, it has no choice but to burn until all flammable ends have been destroyed. † This use of violence as a central concept in the film led to change in the film industry as a whole. Bonnie and Clyde are not depicted as the usual murderers.They are charming, beautiful and for all intents and purposes, are of a refined manner and as the tag line goes: they are in love; definitely not the usual criminal sort. However, the film is interesting in its depiction of a criminal life as the audience finds it increasingly difficult not to sympathize or root for the ‘bad guys. ’ Even though the odds are against it, we the audience, find ourselves wishing that the couple will make it out alive and perhaps grow old together and leave the li fe of crime behind for an idyllic setting.But even Bonnie’s poem foreshadows their eventual fate. Someday they’ll go down together; they’ll bury them side by side; to few it’ll be grief; to the law a relief’ but it’s death for Bonnie and Clyde. Here the film gives us the moral of the story that if one lives by the sword, one dies by the sword. The attempt of the film to ‘subjectify’ the criminal life was definitely successful and the message is clear: not everything is black or white and good or bad.The audience is left with the feeling that although the actions of Bonnie and Clyde cannot be condoned by any moral person, we can sympathize with their situation. This is indeed a powerful effect considering the murders and the thievery that occurred in the film. On the negative side, the film probably opened up a tradition of cinematic endeavors to treat murder and crime in a casual and non-chalant way. The criminals in this film a re portrayed in such a manner that makes them icons and idols of sorts—which is actually twisted in a way.The iconography of the film, as examined by Mary Elizabeth Strunk in the American Studies Journal explains that. â€Å"Yes, Bonnie and Clyde commit reckless acts of violence, but they look so good doing it. Against the film’s stagy Depression-era backdrop, the couple becomes the embodiment of youth, romance, and yearning. By contrast, their victims barely register, save as faded cardboard cutouts lacking names or narrative. The camera affirms Bonnie and Clyde as the only living things on an otherwise inert and colorless landscape. †Violence is not only the central theme of the movie but is also the anchor in which the personalities and characters of Bonnie and Clyde are based. The issues relating to identity are also underlying themes for this film. For Bonnie, she knows that she is cut from a different cloth altogether and would like to be remembered for be ing different. Clyde, on the other hand, grappling with his inner demons (mostly, brought on by lack of sexual potency), thirsts to be remembered by many. For him, it does not seem to matter what he is remembered for, just as long as he is remembered.If one were to psycho-analyze this film, one might even say that it could have been Clyde’s sexual malfunction that led him to a life of crime with the gun serving as a substitute for sex. This misplaced pride they both have in being recognized is clearly seen as they proudly read to each other what the newspapers have wrote about them—even if it is merely a catalogue of the crimes they have done or thought to have done. Works Cited Internet Movie Database. Bonnie and Clyde. Retrieved on May 11, 2008 from http://www.imdb. com/title/tt0061418/ Gledhill, C. (1986). Dialogue on Stella Dallas and Feminist Film Theory. Cinema Journal 25, No. 4 BOOKRAGS STAFF. â€Å"Bonnie and Clyde: Themes†. 2000. May 12 2008. http://www . bookrags. com/films/bonnieandclyde1967/themes. html> Strunk, M. E. (2007). Bonnie and Clyde’s Other Side. American Studies Journal No. 50. Retrieved on 12 May 2008 from http://asjournal. zusas. uni-halle. de/85. html FLIPOUT E-ZINE. Women In Film. Retrieved 12 May 2008 from http://www. geocities. com/albanystudent/wif. html