Wednesday, September 11, 2019
Debate for Australia euthanasia Essay Example | Topics and Well Written Essays - 1750 words
Debate for Australia euthanasia - Essay Example The same view is held by the Islamic religion (Bulow et al., 2008). Therefore, the opponents view legalization of euthanasia as being immoral and against Godââ¬â¢s commandment since it does not sanctify life. However, the proponents have responded by arguing that legalizing euthanasia will actually uphold human dignity. They have argued that no person should be allowed to undergo torture from terminal illness. Such continuous pain, they have pointed out, which medicine has no control over degrades human dignity and defeats the very logic for continuing to live. Therefore, euthanasia will do more good than harm (Norval & Gwyther, 2003). In addition, they have also said that the society is built on fundamental values of compassion and mercy. The society should therefore rise to the occasion and help the terminally ill from suffering unbearably without any help (Norval & Gwyther, 2003). Euthanasia as murder versus right-based arguments The opponents have viewed legalization of euthan asia has a commission to commit murder. They have argued that any action intended to take away another personââ¬â¢s life is inherently wrong and should never be allowed even if the victim has given the consent (Somerville, 2003). Euthanasia has therefore been viewed has killing of other human beings and fervently opposed on those grounds. On the other hand, the proponents have made an argument against this view by pointing out to the principles of autonomy and self-determination. The argument has been that a patient has a right to his or her life and therefore can determine on how he or she should die (Bartels & Otlowski, 2010; Kerridge, Lowe & Stewart, 2009). The autonomy principle allows... The argument has been that a patient has a right to his or her life and therefore can determine on how he or she should die (Bartels & Otlowski, 2010; Kerridge, Lowe & Stewart, 2009). The autonomy principle allows a patient of sound mind to make any decision pertaining to his or her life as long as such a decision does nobody any harm (Norval & Gwyther, 2003). Along this line, it is argued that a patient has a right to determine when he or she no longer wants to live. It is further argued that, due to the principle of autonomy, a patient has a right to his or her own decisions and equally a right to a dignified death (Bartels & Otlowski, 2010). In general, the proponents argue that by patients being denied the right to euthanasia, the society is actually tramping upon their (patientsââ¬â¢) rights and forcing decisions on them (patients) which they (patients) do not necessarily ascribe to. In other word, the insistence on the sustenance of the status quo in reference to legalizatio n of euthanasia is a continued violation of patientsââ¬â¢ rights and thus those of human rights. How have the opponents responded to these accusations of violating human rights specifically the principles of autonomy? The proponents have come out strongly and fiercely claiming that actually allowing euthanasia is an abuse of autonomy and human rights contrary to what the proponents have said. The opponents have argued that the principle of autonomy advocates for conditions that favor autonomy. Any attempt to suppress any condition.
Tuesday, September 10, 2019
The Grapes of Wrath Essay Example | Topics and Well Written Essays - 1250 words
The Grapes of Wrath - Essay Example This paper will examine whether or not the themes of John Steinbeck in his novels -- particularly in relation to poverty - are still relevant in today's times and whether the message that he wished to impart is universal and timeless. John Steinbeck was born on February 27, 1902. He pursued studies at the Stanford University but dropped out of university in a bid to jumpstart his writing career. He gained acclaim by writing about the common people toiling amidst the Great Depression, describing desperation and poverty with vivid and colorful images that touched the hearts of many. In The Grapes of Wrath, Steinbeck chronicled the travels of the Joad family from the Oklahoma Dust Bowl to California, which the family believed to be a land holding much promise and fortune for them. Together with a thousand others making the mass exodus, they brave the dusty highways carrying only their dreams and fuelled only by their faith. During their trip, they simulate society and social norms. Leaders emerge, "rules" are formed, bonds are forged, and human behavior is exposed. But even at the start of the novel, Steinbeck already established the theme of desperation of the American farmer, and how they are left out in the cold by society. Says Seelye (2003): Steinbeck uses Tom Jo... But even at the start of the novel, Steinbeck already established the theme of desperation of the American farmer, and how they are left out in the cold by society. Says Seelye (2003): Steinbeck uses Tom Joad's return from prison as a device emphasizing the alienation through dispossession of a great number of American farmers. The deserted, ramshackle Joad house is a mute witness to the impersonal, callous nature of American capitalism, which places profits over the well-being of hard-working tillers of the soil. At first identified with his family, Tom's progress thenceforth is deeper and deeper into the communal American soul, the larger family with which he becomes identified as his own disintegrates. It is of course, not unusual for writers to use literature as a forum for economic analysis. Of course, much drama is injected and there are plot twists and turns that would differentiate it from a purely economic piece. However, it cannot be denied that throughout history, literature has always been used to make a commentary on a prevailing economic situation. A good example of this may well be Gabriel Garcia Marquez' "One Hundred Years of Solitude", where the climax of the story was the savage killing of plantation workers who participated in a strike to protest oppressive working conditions. According to Watts and Smith (1989): It has long been noted that although literature and drama, like language, function as institutions in some ways separate from economic forces and conditions, they do play an important role in shaping public opinion and standards on many economic issues. In turn, economic thought and circumstances help shape and direct literature, drama and language. It is surprising then that few
Monday, September 9, 2019
Paul and Elder Critical Thinking Assignment Example | Topics and Well Written Essays - 250 words
Paul and Elder Critical Thinking - Assignment Example Intellectual courage is also another very important trait that an intellect should have. This is having a conscious to face and address presented ideas and believes or points of views of other individuals. One should not just take believes and theories from people irrespective of their educational background. All the ideas presented should be subjected to questioning so that facts can be extracted from the claims presented. Critical thinking involves people analyzing thoughts of other people to find out if there is an error of reasoning in the thinking aspects. We should not consider anything said or written to be true because there might be a given form of information distortion and hence itââ¬â¢s our obligation as listeners to determine that particular distortion and correct it through meaningful questioning and giving the possible answers. The third and very important intellectual trait discussed is the intellectual empathy. This is the conscious that is brought out during a thinking and imagination process. Errors in imagination should not be taken lightly. This can be described as a way of putting oneself in the imaginative shoes so that one can exactly understand the feeling and the meaning of a given imagination presented to the public. This trait also reminds one at a given past when the thinking to a given issue that was not all as what was expected. Each person must at one point differ with other individuals especially colleagues in the thinking process. Hence remembering is an important factor presented by this trait. Other traits include intellectual integrity, intellectual perseverance, faith in reasoning and fair-mindedness. All these traits once adopted, an error in reasoning cannot occur. Hence each individual should struggle to think rightly to avoid any form of miscommunication or distortion of the intended message that is to be passed
Sunday, September 8, 2019
The danger of smoking Research Paper Example | Topics and Well Written Essays - 1750 words
The danger of smoking - Research Paper Example Therefore, it is extremely essential to increase the level of awareness of the general public regarding the ill effects and hazards of smoking. The cigarette smoking might immediately change the precious life of the human being into death through stroke or heart attack. According to Gary Ford, it is stated that habit of consuming tobacco is more influential rather than health consciousness. Therefore, these individual consider tobacco smoking to be a passion or relaxation from their mental tension and so, they consume tobacco without any distress for health. Moreover, most of the individual treat smoking as a sense of status and style and so do not believe in the statistics of deaths presented by WHO or National Health Service (NHS). But they always remain in the top-most position in the list of deaths caused for excessive smoking of tobacco. Therefore, in order to decrease the rate of deaths or health related disorders, the passion of tobacco smoking needs to be reduced significantly. Tobacco smoking is extremely dangerous as it means the inhalation of numerous harmful chemicals or by-products of smoke such as nicotine, tar and carbon monoxide. Nicotine is the addictive constituent of tobacco (Ford 525). When nicotine is smoked, then immediately the molecules get inside the lungs of the individual. Then these nicotine molecules get absorbed by the blood stream and travel to the brain and lock the specific receptor regions. However by locking the specific receptor regions, the brain gets affected in a way that hinders the metabolism and appetite of the individual. Carbon monoxide is also another important ingredient of tobacco smokes. Carbon monoxide is also a poisonous gas inhaled into the lungs and absorbed by the blood cells of the body. After being inhaled, carbon monoxide reduces the amount of oxygen present in blood cells and so numerous cells die, because of lack of oxygen supply. However,
Saturday, September 7, 2019
Refugees in Erie Pennsylvania Essay Example | Topics and Well Written Essays - 250 words
Refugees in Erie Pennsylvania - Essay Example In the Erie region, refugees have limited access to health care services, as the provided care by the state agencies and local organizations are insufficient (USCRI, 2011). Additionally, they have limited, or no access and control of resources because they come from conflict-ridden communities such as Iraq, Bhutan, Somalia, Congo, and Ukraine among other countries. Refugees have little or no access to formal education that is enjoyed by other USA citizens. Although they make up a legal percentage of the population, these people are not entirely incorporated to the national budgetary allocation for education or other social amenities (USCRI, 2011). However, they benefit from the intervention of the local faith-based organizations. Furthermore, due to the living condition and lack of resources, these people live in adverse poverty. Their access to basic needs such as shelter and adequate nutritious food is limited. Regardless of the poor conditions experienced by the refugee in the Erie region, they contribute to the community with their cultural heritage used in day-care services. Specifically, the Bhutanââ¬â¢s cultural practice is a potential source of income for the women. The traditional songs of the refugees are necessary tools that enrich the lives of the day-care teachers and children (Pennsylvania Department of Health, 2012). The refugee women train for careers in childcare where they get employment to improve their
Friday, September 6, 2019
Trace the historical development of physical education Essay Example for Free
Trace the historical development of physical education Essay Trace the historical development of physical education and discuss the effects that these developments have had on your opportunities to develop performance in your chosen activities The historical development of physical education has had a significant effect on my opportunities and personal performance. I will be investigating the effect of historical development of physical education by looking at various Acts made during the past two centuries, especially in schools and the various forms of physical education lessons which have been used in the past. In the nineteenth century there were two distinct traditions in education Public Schools and State Elementary Schools. Public schools were for the gentry and were fee paying. They were usually non-local, residential and were single sex schools. The students played many games and concentrated on the characteristic of leadership and teamwork. They would regularly play these games and develop the rules which had recreational values. The facilities were good due to the fees paid. Physical Education has developed dramatically in public and private schools since. Education in this country started with private schooling for the social elite. Pupils enjoyed extensive facilities and focused on the character building aims of education, as preparation for responsibilities in later life as employers, officers, members of the clergy and so on. Competitive team games developed to serve these aims. There was always a concentration on sport rather than a physical education emphasis and this is still common today. Competitive fixtures are a recognised feature and the reputation from winning helps to distinguish different schools. During the eighteenth and nineteenth century State Elementary schools were for lower class people. They were free, cramped and had mixed sexes. The type of teaching was associated with military drills and Swedish gymnastics, and was more based on physical training. The lessons low status and there was lots of foreign influence. The students were valued for discipline and the training was to get them fit for war. They were more interested in social control values recreational and educational values were learnt later on. This is also changed dramatically over the years. State education began after the Forster Education Act 1870 which initiated compulsory schooling for all. In the state system physical education is compulsory and is a core subject of the National Curriculum. The class teacher is usually in charge, though is not usually a specialist. The content of the lessons is usually based on movement and ball skills. Learning by moving and doing is considered essential to the physical, emotional, intellectual and social education of young children. Variety is also important as concentration span is limited and stimulating activities need to be included. In addition to the curriculum, many schools also offer club activities like gymnastics, netball, soccer, country dancing, etc. Another major historical development was when a man called Thomas Arnold encouraged moral features of teamwork such as self discipline, loyalty, courage, character building qualities and leaders. By mid nineteenth century headmasters and staff in public schools started to organise sports. This helped with the development of games. There was local variation of games to schools from villages, the students played regularly and in their free time, school rules, skills and boundaries were developed, teams played competitively, the boys organised a self government, codified rules and inter-school fixtures began and there was the development of games elite. Athleticism was the physical endeavour with moral integrity. The cult of athleticism stressed the physical and social benefits of sports. Physical benefits were seen to cancel out the effects of inactive lifestyles. Sport was seen as therapeutic, invigorating and beneficial. It was a break from work. Sport could take place in a competitive situation which would help the boys to cope with winning and losing in a dignified manner. This in turn developed leadership qualities e.g. being captain was a high status office to hold and inspiring to many of the other students. The performance was seen as more important than the result. Athleticism also met middle class values of respectability and order. Values of sportsmanship, leadership and abiding by the rules. There were people who were against the idea of athleticism. They said that it lead to regimentation of boys thoughts and behaviour with destruction of individuality, and believed that students were finding it more important the their other studies. Old boys brought games from universities with codified rules and philosophy to excel at their sport. This contributed to technical development and improved standards. Sports Day was also introduced which gave a chance for old boys, parents and governors a chance to relate to exercise. Athleticism brought about an old boys/girls network, sports clubs and governing bodies became significant administrative features, officers in army and navy influential on troops, clergy influenced parishioners, teachers went back into schools, employers encouraged games in their workforce and the empire enabled these developments to be spread world wide. Overall it can be seen that athleticism was a benefit in developing physical education and it still carries on in todays sport. Female Education also helped development in physical education. In the late 1800s education for girls was very poor, pretentious and costly. Accomplishment for society was not intellectual development and competitiveness was not socially acceptable for women. Muscles bound was not good for childbearing and was a threat to the normal behaviour. Due to wealth in the 19th century there was more leisure time and the women were more hard headed, had more common sense and groups of middle class women overcame prejudice. The Schools Inquiry Commission 1868 was important, and in 1881, universities recognised the girls fulfilled degree requirements of boys. In 1898 there was the endowed Schools Act where by 80 girls were endowed. And by 1900 there were 36 public schools for girls, and by the 1918 Act gave girls the same education as boys. miss Bergman wrote the Teachers Encyclopaedia which introduced the principal games in girls school hockey, cricket, basketball and lacrosse. She also saw the benefit of tennis but felt students were already reasonable proficient from their social backgrounds. Womens athletics emerged in the last 1/4 of the nineteenth century. Physical activity developed later. The development was linked to sociological factors. When prejudicial attitudes began to change, girls began to participate in activities such as tennis, hockey, gymnastics and cricket. Social games like tennis allowed a mixture of sexes. Female participation in physical activity have helped to develop my opportunities to develop performance as tennis was one of the first sports women were allowed to play. The ladies were able to play privately away from the public gaze, and it was a game which helped to remove some of the stereotypes. They could run around becoming increasingly energetic and clothing began to be slightly less restrictive. Schools also accepted the game as it was non-contact, had rules and was acceptable to the parents. The middle classes also ensured its club development and the administrative structures. The lower classes had to wait until there was public provision, so their participation was delayed. Real tennis was similar it was the sport of the noblemen and royalty and in 1536 there were restrictive acts which forbade servants and labourers to play. This helped to retain the privileged status of the elite. The game was originally played with the hand but the development of rackets led to this being a more popular way of playing. It was a very sophisticated, exclusive game requiring expensive facilities, equipment and an understanding of the complex rules and social etiquette of the game. The Model Course was a major development of physical education. This course encouraged a policy of drills and physical training, but little recreational value. In 1902 the Model Course was instituted by Colonel Fox of the War Office. The aim was to improve the fitness of working class for military preparation, increase familiarity with combat and weapons, and improve discipline and obedience amongst the working class. The drills were done in uniform, in military rows with the students obeying commands. The problem was, they were teaching adult exercises to children. This model was not taking the needs of physical and mental development into account. There was no educative content and individualism. The teachers were not qualified and were of a lower status. Due to the problems the Board of Education established syllabus of physical training in 1904, 1909, 1919, 1927 and 1933. These stressed the physical and educative effect of sport. The physical content of the syllabus was influenced by the primary concern for medical and physiological base from which they approached the subject. Therapeutic effect, correction of posture faults, exercises to improve circulatory system were foremost in the aims. The educational aims were to develop alertness and decision making. The 1919 syllabus had consideration in loss of life in World War 1 and the flu epidemic after. The 1933 syllabus was more do to with the freedom of movement and was more decentralised. There was a recognition of the increasing rights of the working class and development of educational value of group word. Millions died in World War I, and so public schoolmen had ideals of service to the country and were enthusiastic about conflict. Following the war there were hopes of a more equal society due to massive loss of life sustained from all levels of power and responsibility of society. After World War II the Butler Education Act 1944 was introduced. This was a major social reform in Britain, it removed special privileges and ensured equality of opportunity to all. There were 146 local education authorities which provided recreational facilities, the leaving school age was 15, education in grammar schools was free and the 11 plus was introduced, new secondary schools were built, there were more mature forms of P.E. and the 1944 McNair Report gave physical education teachers the same status as other teachers. The rebuilding program after the war helped develop physical education. The facilities became more sophisticated, more physical education teachers were enlisted and there was a movement away from therapeutic and medical values and more emphasis on heuristic and guidance style of teaching. The movement approach was also introduced. Children used their initiative and learnt by discovery. Other major developments were that team games were giving way to more individual pursuits, travel was now available to all classes, the motor car enabled mobility fro even the working classes and air travel had become commonplace for sport teams which also resulted in an increase in competitions. Television had a major impact on sports, creating interest in new heroes in sports otherwise unknown to millions. National and international standards rose at the expense of school performances. Local authorities were supplying more recreational facilities such as swimming baths, adventure playgrounds etc. The development of National Parks opened up the countryside and encouraged outdoor activities. People were more free to choose their leisure pursuits than ever before. The Moving and Growing Programme was also a major development in the history of physical education. There were two publications Ministry of Education 1952 and 1953. The had influences of obstacle training from the army and movement training from centres of dance. There was also circuit training, weight training (progressive resistance training) and there was Outward Bound Schools promoting adventurous activities to develop personalities within natural environment in challenging conditions. This was more of a child centred approach, and as a result of educational thinking physical education teachers were now autonomous with personal control over the physical education syllabus. The activities included agility, playground and more major game skills, dance and movement to music, national dance and swimming. This was more exploratory, creative, individual and fun. Due to this programme many more activities have become available in schools curriculum, and these sports have become more ad venturous and our knowledge has increased over the years on these sports. The National Curriculum attempts to raise standard in education and make schools more accountable for what they teach. Physical Education is compulsory from the ages of 5-16. There are attainment targets and programmes of study. Children are required to demonstrate knowledge, skills and understanding involved in areas of various physical activities. There are four Key Stages. The Physical Education curriculum took place in August 1995 with Sport, Raining the Game. This has been outdated by Curriculum 2000 changed, which brought physical education more into line with other subjects. The advantages of the National Curriculum are that there is a uniformity of experience and the approach is co-ordinated. It gives the teachers guidance and there is a wide range of experience with pupils. However some would disagree and say that there is no allowance for regional variations and that it can limit choice for teachers. They also think that the tradition of schools is lost and that the cost of facilities and resources is greater. The National Curriculum can help in my performance as it helps me to judge how I am progressing and how I can improve. It gives me goals to work towards to achieve the next highest level. Assessments in physical education are also very common. The have aims and objectives and the achievement of the student is evaluated and progressed. There are several types of assessments longitudinal student profiles, purely quantitative data like fitness tests and generalised comments. Children need to show what they know, what they can do and understand. Written and verbal language is also important, and being able to use all of these in performance situations. The assessment evaluates the whole person and is not just physical. The ability to work in a group, individually and the ability to abide by the rules is also important. These assessments have helped develop my performance as teachers and coaches can give feedback on how to progress and due to mark schemes etc. they can judge how far I am progressing and what my aims are for the future and how I can improve further. The changes in society and education in the last 20 years have affected school sport i.e. extra-curricular opportunities, with a reduction in emphasis on the sporting elite. Extra-curricular clubs, open to all, became more acceptable. Although, many teachers continued to focus on competitive sports and extra curricular activities were affected by the teachers strikes in the early 1980s, financial cuts were felt in terms of transport, the local management of schools allowed schools to supplement their funds by selling off school fields, the increasing amount of leisure and employment opportunities from children meant they were less attracted to competing for their school team and the anti competitive lobby became more vocal. Competitive sport helped to develop children in sport. The children taking part would have a natural competitive instinct, and would be more motivated to practise. They would also enjoy the sport more and competition can raise self esteem and they can learn how to cope with failure and success. But some people espoused the theory that competition in sport was not good for childrens development, stating the continued feelings of failure can cause stress and anxiety and the need to win can encourage unsporting behaviour. Over the years people have also come to realise that sports can greatly benefit overall fitness including reducing the risk of dying prematurely, reducing the risk of dying from heart disease, reducing the risk of developing diabetes, reducing the risk of developing high blood pressure, helps reduce blood pressure in people who already have high blood pressure, reducing the risk of developing colon cancer, reducing feelings of depression and anxiety, helps control weight, helps build and maintain healthy bones, muscles, and joints, helps older adults become stronger and better able to move about without falling and promotes psychological well-being. Due to realising theses developments the government has produced better sport facilities which can also aide in our development of physical education. In conclusion it can be seen that all of these periods in history have contributed to the development of sport. They have increased the amount of opportunities that we have and the facilities have greatly increased. Due to many of the Acts and the National Curriculum we are now free to participate in a much larger variety of activities and not only do we involve ourselves in physical activities but we learn the educational side of sport. I think that through the times the physical education system has improved and now we have more freedom to do what we want. I think that it is good to have physical education compulsory to a certain age as it is an attempt to keep children informed of the benefits of health and fitness and can keep the children more lively and enthusiastic about sport.
Thursday, September 5, 2019
The Motion Detector Sensor Engineering Essay
The Motion Detector Sensor Engineering Essay Home automation is a system that uses to help the resident to do the household activity or housework. These housework or household activity can be from pet feeding, plant watering, home entertainment system and so on. It can be operate either automatically or sometime control remotely which all depend to the home resident [2]. The entire system can be controlled by using from remove control, computer, internet until telephone. The home automation covered very wide of hoe system and it is also including home security system. The home security system basically can be separate to five categories [3], there are: Detection of intrusion Simulation of presence Detection of fire, gas and water Medical alert and precise Safe closing of blind For this project, only 2 categories have been discussed. There are detection of intrusion and detection of fire. And there are 4 types of intrusion which are [3]: i) Detection of movement ii) Magnetic contact of door or window iii) Glass breaking and pressure change iv) Pressure change 2.1 Part research and analysis 2.1.1 Motion detector sensor Only detection of movement has been discussed for this project. In here, the detection of movement means the movement that cause by human being and a motion detector sensor being use to detect the motion. A motion detector sensor can separate to active and passive and it can detect motion by using optics or acoustics. An active motion detector sensor is dispersing a constant field to detect motion. The field will remains static until something is enters it then disturbs the reflected pattern. Meanwhile, a passive motion sensor is waiting in standby mode in order to trigger a threshold setting when motion is detected. However, active and passive technique both have similar disadvantage. They only can sense very limited range that may weaken with distance. As the result, combination of both techniques has been used to gain greater effectiveness to detect the motion [4]. There are several types of motion detector sensor being use in the market [5] for example: i) Infrared motion detector sensor Infrared motion sensor is the most reliable and cheapest among the entire motion sensors available in the market. The concept of infrared motion sensor is using the infrared light spectrum to measure the heat of objects that pass in front of it. Then it will compare the heating level to heating level that cause by objects that behind it. The wavelength infrared wave is between 0.7 and 300 micrometers but shorter than theà wavelengthà ofà visible lightà but longer than microwaves that cannot be detected by human senses but can felt as the heat. This infrared motion detector sensor can be fitted with different lenses to get greater distances. Basically the infrared motion detector sensor separate to 2 types only, there are passive and active infrared motion sensor [6]. The passive infrared sensors will detect electromagnetic radiated energy that generate by external sources like thermal energy emitted by people in the infrared range as figure. The thermal energy will reaches to the sensor that comprise more than one individualà sensor which made from pyroelectric materials. This sensor will generate an electrical voltage according it is heated or cooled [7]. Figure 1: The operation of passive motion infrared sensor [8] Meanwhile, the active infrared sensors will generate a multiple beam pattern of modulated infrared energy and react if it has change in the modulation of the frequency or an interruption in the received energy. The active infrared motion basically consist emitter and receiver pairs to generate IR detection zone. However, this emitter and receiver pairs need to adjust probably to achieve the best balancing between reflected IR energy and transmitted IR energy. This balance is called as the threshold level of reflected IR. If the reflected IR energy significantly above the threshold level, IR motion detector sensor will trigger on as figure: Figure 2: The operation of active motion infrared sensor [9] ii) Microwave motion detector sensor Figure 3: The operation of microwave motion sensor [10] The microwave motion detector sensor is type of active sensor that using radar callà Doppler radar to send out microwaves in order to detect and measure the movement of an object. Then it will receive the returning waves that cause by moving object to determine the distance, direction even the speed of the object. Basically the microwave motion detector has 2 types, they called bistatic and monostatic [11]. The bistatic type contains emitter and receiver which operate separately to configure the beam to fit particular situation. It has a larger detection range which up to 1500 linear feet but it cannot define the area of detection and easy to cause the error [12]. Meanwhile, the monostatic type can define detection area based on microwave beam that it emits. The detection range is smaller than bistatic which only 400 linear feet but it more efficient [12]. Although the microwave motion detector sensor cover a larger area than infrared sensor and more reliable over longer distances, but it is least popular because of their vulnerability to electrical interference and expensive cost [11]. iii) Ultrasonic motion detector sensor Figure 4: The operation of ultrasonic motion sensor [13] An ultrasonicà motion detector sensor will detect the movement by generating the sound wave in the ultrasonic frequency range around 30 kHz to 50 kHz within the limited area [14]. It will generate a cone-shaped sound wave and listen to the echoes. . The sound wave generally inaudible to humans and most animals but it does not pass through most objects. So, if no object is moving within the zone of detection, the pattern of sound wave in its environment and the time that reflected back will remain the same. However, if something moves, the microwave detector will detect and analysis the level or phase of returning sound waves then will trigger on the sensor [14]. Basically this ultrasonic motion detector sensor separated to 2 types, there are active and passive. [15] The active ultrasound motion detector sensors emit sound waves from quartz-crystal transducers then the sound wave will cover within the field of detection. The sound wave will not disrupt if there is no any movement detected. However, the sound wave will disrupt when movement detected and reflected back to receiver. The receiver will sent the signal to control unit and trigger on the sensor by analysis its sensitivity and calibration. Although the microwave motion detector sensor very efficiency in performance, but it is weak in very short of the field of detection that only detectable up to forty feet [15]. Meanwhile the passive motion detector sensors operate on the principle of sounds for example breaking glass to trigger on the sensor. These sounds produce sound waves that detected by the sensors which same concept like the active sensors. The signal will sent to control units to determine if the sound wave pattern falls within established normal parameters [15]. Table below is the summary of technologies to detect the motion: Technique Description Advantages Disadvantages 1) Infrared [6] Active: Generate multiple beam of modulated infrared energy and receive any interrupt or change of received energy Passive: detect electromagnetic radiated energy that generate by external sources like thermal energy i) Low cost ii) Easy to maintain i) Cover very small area 2) Microwave [12] Cover area with electronic field and receive any disturb or movement of electronic field i) Cover large area ii) Quick response i)High cost ii)Too sensitive 3) Ultrasonic [15] Generate sound wave and reflect the sound wave if any disturb or movement i) Cover large area ii) Quick response iii) Long lifetime i) Easy affect by environment vibration ii) High cost Table 1: Summary and comparison of 3 technologies to detect the motion 2.1.2 Heat detector sensor For another category which is detection of fire, there also have several techniques to detect it. These techniques are sensing in temperature, humidity and smoke [3] and sensing in temperature will be discussed in this project. There are few technologies in this market to sense the temperature [16] like table: Technologies Description Advantages Disadvantages 1)Thermocouple [17] Consist junction of 2 types of metal that joined together will produce voltage which varies with temperature change i) can used in wide temperature ii)Fast response i) Low accuracy ii) short life time 2) Resistance thermometer (RTD) [18] Electrical resistance of pure metal will increase with rise of temperature i) High accuracy ii) Good stability i)Slow response ii) High cost 3) Thermistor [19] Type of ceramic resistor that resistance will change with temperature changing i) Accuracy in small scale of temperature range ii) Good vibration i) Limit in small temperature range Table 2: Summary and comparison 3 of technologies to sense the temperature in the market 2.1.3 Wireless system application Short range radio application The table below show that the summary of some short range radio application and characteristics that use in the market. Application Frequency Characteristics Security system 300MHz -500MHz,800MHz,900MHZ Simplicity, easy installation Emergency medical alarms 300MHz-500MHz,800MHz Convenient carrying, long battery life, reliable Computer accessories UHF(Ultra High frequency) High data rates, vary short range, low cost RFID (Radio Frequency Identification) 100kHz to 2.4GHz Vary short range, active or passive transponder Wireless microphone and headphone VHF(Very High Frequency), UHF( Ultra High frequency) Analog high fidelity voice modulation, moderate price Keyless entry(gate opener) UHF(Ultra High Frequency) Miniature transmitter, special coding to prevent duplication Wireless bar code readers 900MHz, 2.4GHz Industrial use, spread spectrum Table 3: Short range radio application [20] Figure 5: Radio communication link diagram [21] Figure above is the radio communication link diagram. In transmitter, the source data will send to encoder to create a group of bits then sent the signal to receiver to make sure that no any false occurrences happen. Then the receiver will check and only accept the signals that the same address bits same with it. The signal that sent which also call message frame has 4 fields [21] like figure: Figure 6: Message frame [21] The first field is called preamble that as start bits to tell the receiver the message begins. Next field is called address, it will identify address and notifies the receiver come from which units that message is coming which sent by transmitter. Then the data field will follow on which it may indicate what type of event is being signaled in some protocols. Finally last field is parity which allows the receiver to determine whether the message was received correctly or not [21]. When several transmitters are used with the same receiver, all transmitters need to have the same identification address which set by receiver where receiver need to be set to recognize the identification address of all the transmitters that used in the system. Table below is the summary of advantage and disadvantages of two addressing system [21]: Advantages Disadvantages Unlimited number of transmitter can be used with a receiver Limited number of bits increase false number and interference from adjacent system Can be used with commercially available data encoder and decoders Device must be opened for coding during installation Transmitter and receiver can be easily replaced without recoding the opposite terminal Must be used with a dedicated microcontroller and cannot be used with standard encoders and decoders Each transmitter is individually recognized by receiver Limited number of transmitters can be used with each receiver Large number of code bits reduces possibility of false number Longer code reduces probability of detection Table 4: Advantages and disadvantages of two addressing system [21] 2.2 Review of similar product No Product Specification Cost Reference 1 Motion detector alarm set Detect motion and activates alarm -Build in high output 105dB alarm -Keypad to arm or disarm and security code -120VAC adapter operate US $24.99 [22] 2 Wireless motion system CWA2000 Transmitter can transmit signal to receiver until half mile away -Activates LED and buzzer on base station when detect motion -Expendable up to 8 motion sensor -Can adjust sensitivity of detection -Receiver required AC power and 4 AA batteries for backup mode -Sensor required 4 AA batteries US $99.00 [23] 3 Skylink SC-10 wireless Home security system -Consists 2 door or window sensors and 2 keychain transmitter -Arm or Disarm by using keychain transmitter -Build in high output 110dB siren -Expendable up to 15 sensors operate by AC power and 4 AA batteries for backup mode US $109.95 [24] 4 Powermax + wireless intruder alarm -Support real time viewing from camera -Consist 3 PIR sensor and 2 magnetic door sensor with wireless -External high output siren -Sent message to user by email, SMS or phone when any incident happened -Support latchkey to inform parent when child arrive to home -Remote home management which provide control and status update up to electrical devices -Required AC power to operate à £257.00 [25] 3.7 Hardware description 3.7.1PIC16F874A microcontroller Figure 14: Pin description of PIC16F874A microcontroller [26] The behavior of the Home Security system basically control by three PIC 16F8XX microcontrollers. The PIC16F8XX microcontroller is under Microchip PIC microcontroller device and very commonly being use because of low-cost, low-power consumption but high speed in performance and I/O flexibility if compare to other device and family. The microcontroller emphasizes almost same function as a microprocessor but PIC Microcontroller only operates at very low speed or frequency which only few MHz or even lower if compare to microprocessors that operate with high speed or frequency. Besides, PIC microcontroller consumes very small among of power consumption which only around miliwatts. So, PIC Microcontroller is more suitable for home security system compared to microprocessor in terms of size, cost, power consumption and the memory to control the input/output devices. They are three types of microcontroller also take into consideration, which are PIC 16F84A [27], PIC16F874A [26] and Atmel-AT89C2051 [28].The comparison was made before the final decision make. Below is the table of comparison between 3 microprocessors: Features Microchip (PIC16F84A) Microchip(PIC16F874A) Atmel(ATmega88V) Instruction 35 single word 35 single word 131 single word Operating speed 20MHz 20MHz 20MHz Flash Program Memory 1024 x 14 words 4k x 14 words 8k x 14words Data Memory(RAM) 68 x 8 bytes 192 x 8 bytes 1k bytes internal SRAM EEPROM 64 x 8 bytes 128 x 8 bytes 512 x 8 bytes I/O Port 13 33 23 Counter/timer 1 3 2 Counter bit 8 bits 16 bits 16 bits Series Interface (MSSP) -In-Circuit Serial Programmingâ⠢ (ICSPâ⠢) via two pins Synchronous Serial Port (SSP) with SPIâ⠢ (Master mode) Ià ²Câ⠢ (Master/Slave) Master/Slave SPI Serial Interface Byte-oriented 2-wire Serial Interface (Philips Ià ²C compatible) Operating Voltage 2.0V-5.5V 2.0V 5.5V 1.8V 5.5V Software MPLABà ® IDE MPLAB ICD2 MPLABà ® IDE MPLAB ICD2 ATAVRISP
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