Design models of Facebook and Safari Research Paper

Design models of Facebook and Safari - Research Paper Example This research will begin with the statement that Google Chrome and Safari belong in the category of the client/server structure as they have servers that provide services to subsystems, which are clients. Every client has known how the interface of the server looks like but the server has no use knowing how the interface of the client looks like. The response of the server to the client and vice versa is immediate. The end users do not need to be involved in any kind of interactions with the server and therefore all interactions are limited to the client. The client enables the user to input data into the system and then takes over the processing of the data input. The use of this kind of architecture is to enable the creation of a user-friendly application for the client. The server, on the other hand, manages the data from a centralized location and takes care of the security of the database. This model structure, however, has a flow as there is no peer to peer communication betwee n the server and the client. Peer to peer communication is a necessity in this kind of structure and often needed. Dropbox, icloud, Instagram and Google drive belong to the architectural style of peer to peer where the servers and clients can be peers and clients can be servers while at the same time servers can be clients. Microsoft PowerPoint belongs to the repository architectural style where subsystems have the ability to access and modify any data using a solitary structure called the repository.

The Presence of Fear in Lord of the Flies Essay Example for Free

The Presence of Fear in Lord of the Flies Essay The presence of fear in Lord of the Flies Lord of the Flies is a relatively short book, but within its small amount of text William Golding is able to do much more than tell an exciting story. He digs deep into human nature and the natural corruption in peoples souls. He specifically explores the impact that fear has on people and how it makes them act. In Goldings eyes, humans are doomed just as the children on the island are, and that is because of fear. He believes that just the presence of terror causes people to overreact and lose common sense, tearing away at the bonds that hold society together. In an attempt to calm or soothe their worries, people end up separating, singling out others and letting their inner savage take over, leaving themselves in an even worse situation. In Lord of the Flies, fear slowly drives all common sense and civility out of the boys and brings them back to a state of savagery. The boys are scared from the beginning of the novel. At first, they are too excited about having an island to themselves to dwell upon their insecurities, but nonetheless they are there. The fear is not openly shown or discussed, but the boys are already subconsciously trying to cover it up. The boys do such things such as singling out Piggy in an attempt to make themselves feel more powerful and in control. Then, Jack pulls a knife on the piglet to try to show power and also to try to show immunity to fear, however, when he did so his face was white under the freckles. (31). Jack is already trying to act tough but at this point this cover that he puts on to hide from the fear has not reached nearly the point of savagery that it does later in the story. It is not until the first fire that the boys begin to openly show fear and even then they quickly change the subject. The cause of this realization of reality is that one of the littleuns disappears. The idea of making a rescue fire is so exciting that they let it get out of control. When the fire burns out they realize that one of the children is missing. When asked what has happened to the child with the mark on his face Ralph replies by saying Perhaps he went back to the, the-. . He knows what has happened, the boy was burned to death, but he does not want to admit it. This is like a wakeup call for the boys and they start to see the reality and the dangers of the situation. As the novel continues the fear is progressively growing in all of the children. By page 59, the fear of not knowing what would happen to them and if they would ever be rescued had grown to the point where the littleuns suffered from untold terrors in the dark and they huddled together for comfort. The littleuns were certainly afraid but had no way to really explain their fear or anything to blame it on. It is for this reason that they subconsciously create the beast. At first the biguns are too old and mature to believe in this beast. They realize that it is a figment of the littleuns imaginations and dont give it much thought. However, as their fear of being alone and not being rescued grows, so does their need for something concrete to aim their insecurities toward and to distract them from their real problem. This causes the biguns to begin to lose their common sense and to believe in the beast as well. Simon sees this, but when he tells the others maybe its only us, (89) referring to the beast; he is laughed off. The other boys will not even consider Simons ideas because they have convinced themselves that the beast is reality. As their fear grows so does their image of the beast, and unfortunately their savagery grows as well. This is most evident in Jack. When he is hunting he feels powerful. He is in control and he loves it. Hunting starts to become more than just a food source, it becomes his life. Not only does his hunting activity increase in frequency, it also becomes more and more vicious.

The Brain Pacemaker Essay -- Medical Science

Introduction The brain pacemaker is an interesting invention of the modern technology, it is a medical device that is fixed into the brain to send electroshock signals into the targeted tissues of the brain. This device is used to treat patients who suffer from Epilepsy, it controls their seizures, and helps Parkinson's disease patients better control their movements. Parkinson's disease affects the way you move. It happens when there is a problem with certain nerve cells in the brain. Plus, it treats major depression. What is it? It is a surgical treatment that involves the implantation of a medical device that is either placed in the brain or outside. It sends electrical impulses to specific parts of the brain. When it placed in the brain this treatment is called deep brain stimulation. And when it is placed out side the brain or near the spinal cord it is called spinal cord stimulation, there is another place where it can be placed outside which is around cranial nerves such as the vagus nerve and it is called vagus nerve stimulation. How it works? The doctor drills into the skull of the patient who remains awake during operation two holes, they are the size of a coin. Only that area is anesthetized to keep it numb during surgery. Surgeons then uses computed tomography (CT) scanning to locate the exact targeted area, and then implant two thin wires with electrode contacts near the Cg25 area of the brain. In the area where they believe is causing the patient's disorder. Generally, these targets are the thalamus, subthalamic nucleus, and globus pallidus. Then they stitch the loose end of the wires under the skin and attach it to the pacemaker device, which is fixed near the collarbone. In some cases it may be implante... ...rchers found that when Parkinson's patients received brain stimulation, they had trouble making hard decisions. ? Because the brain can shift slightly during surgery, there is the possibility that the electrodes can become displaced or dislodged this might cause some problems such as personality changes. ? There are other complications of surgery, such as bleeding within the brain. Conclusion The brain is the center of thought, emotion, memory, speech, and many more, and it is the most sophisticated organ in the human body. By it doctors were able to help patients who suffer from Epilepsy, Parkinson's disease and sever depressions by inserting a device called brain pacemaker. It has already helped many patients to overcome their problems. But scientists are still experimenting in making this device more advanced to reduce the number of risks it may cause. The Brain Pacemaker Essay -- Medical Science Introduction The brain pacemaker is an interesting invention of the modern technology, it is a medical device that is fixed into the brain to send electroshock signals into the targeted tissues of the brain. This device is used to treat patients who suffer from Epilepsy, it controls their seizures, and helps Parkinson's disease patients better control their movements. Parkinson's disease affects the way you move. It happens when there is a problem with certain nerve cells in the brain. Plus, it treats major depression. What is it? It is a surgical treatment that involves the implantation of a medical device that is either placed in the brain or outside. It sends electrical impulses to specific parts of the brain. When it placed in the brain this treatment is called deep brain stimulation. And when it is placed out side the brain or near the spinal cord it is called spinal cord stimulation, there is another place where it can be placed outside which is around cranial nerves such as the vagus nerve and it is called vagus nerve stimulation. How it works? The doctor drills into the skull of the patient who remains awake during operation two holes, they are the size of a coin. Only that area is anesthetized to keep it numb during surgery. Surgeons then uses computed tomography (CT) scanning to locate the exact targeted area, and then implant two thin wires with electrode contacts near the Cg25 area of the brain. In the area where they believe is causing the patient's disorder. Generally, these targets are the thalamus, subthalamic nucleus, and globus pallidus. Then they stitch the loose end of the wires under the skin and attach it to the pacemaker device, which is fixed near the collarbone. In some cases it may be implante... ...rchers found that when Parkinson's patients received brain stimulation, they had trouble making hard decisions. ? Because the brain can shift slightly during surgery, there is the possibility that the electrodes can become displaced or dislodged this might cause some problems such as personality changes. ? There are other complications of surgery, such as bleeding within the brain. Conclusion The brain is the center of thought, emotion, memory, speech, and many more, and it is the most sophisticated organ in the human body. By it doctors were able to help patients who suffer from Epilepsy, Parkinson's disease and sever depressions by inserting a device called brain pacemaker. It has already helped many patients to overcome their problems. But scientists are still experimenting in making this device more advanced to reduce the number of risks it may cause.

Manatees :: essays research papers

Manatee, common name for each of three species of a large water mammal, popularly called a sea cow because it grazes on marine grasses and other water plants. The Amazonian manatee ranges throughout the Amazon River basin in South America; the West African manatee occurs in rivers and coastal waters of tropical West Africa; and the West Indian, or Caribbean, manatee is found in rivers and coastal waters from the southeastern United States and the Gulf of Mexico to the Caribbean Sea and northeastern Brazil. An adult manatee has a rounded body, usually colored light to dark gray or black, that tapers to a horizontally flattened, rounded tail. It is 2.5 to 4.5 m (8 to 14 ft) long, depending on the species, and weighs 200 to 600 kg (440 to 1300 lb). The small head includes a straight snout and a cleft upper lip with bristly hairs. Its nostrils, set on the upper surface of the snout, are closed tightly by valves when the animal is under water. The paddlelike forelimbs are set close to th e head; no external hind limbs exist. Massive, heavy bones and long, narrow lungs, which extend through the entire body cavity, give the manatee evenly distributed buoyancy. A manatee cow gives birth about a year after mating; usually a single, pink calf is born.Manatees live in small family groups, although they occasionally travel in herds of 15 to 20. They feed in both freshwater and salt water, grazing for six to eight hours a day. An adult consumes an amount equal to between 5 and 10 percent of its body weight daily. Manatees have a slower metabolism than other mammals of similar size, which sharply reduces their energy requirements. This is especially important for Amazonian manatees when waters recede after floods, confining some for extended periods in shallow waters away from plants on river banks. Manatees have few natural enemies because of their size. However, their population has been reduced significantly by heavy hunting for hides, meat, and blubber oil, and they are frequently injured or killed in collisions with boats. Manatees :: essays research papers Manatee, common name for each of three species of a large water mammal, popularly called a sea cow because it grazes on marine grasses and other water plants. The Amazonian manatee ranges throughout the Amazon River basin in South America; the West African manatee occurs in rivers and coastal waters of tropical West Africa; and the West Indian, or Caribbean, manatee is found in rivers and coastal waters from the southeastern United States and the Gulf of Mexico to the Caribbean Sea and northeastern Brazil. An adult manatee has a rounded body, usually colored light to dark gray or black, that tapers to a horizontally flattened, rounded tail. It is 2.5 to 4.5 m (8 to 14 ft) long, depending on the species, and weighs 200 to 600 kg (440 to 1300 lb). The small head includes a straight snout and a cleft upper lip with bristly hairs. Its nostrils, set on the upper surface of the snout, are closed tightly by valves when the animal is under water. The paddlelike forelimbs are set close to th e head; no external hind limbs exist. Massive, heavy bones and long, narrow lungs, which extend through the entire body cavity, give the manatee evenly distributed buoyancy. A manatee cow gives birth about a year after mating; usually a single, pink calf is born.Manatees live in small family groups, although they occasionally travel in herds of 15 to 20. They feed in both freshwater and salt water, grazing for six to eight hours a day. An adult consumes an amount equal to between 5 and 10 percent of its body weight daily. Manatees have a slower metabolism than other mammals of similar size, which sharply reduces their energy requirements. This is especially important for Amazonian manatees when waters recede after floods, confining some for extended periods in shallow waters away from plants on river banks. Manatees have few natural enemies because of their size. However, their population has been reduced significantly by heavy hunting for hides, meat, and blubber oil, and they are frequently injured or killed in collisions with boats.

Anti Discriminatory Practice: Gender and sexism

Anti discriminatory practice is about taking positive action to counter discrimination. It is about being pro active and presenting positive images of the diversity of people that make up our society and also challenging any discriminatory or oppressive language and behaviour. There are several kinds of discrimination, such as more commonly known, racism, disablism and ageism. One of the things we do when meeting people is to make assumptions about them. This is partly based on how we see ourselves as similar or different to other people. We may respond to these similarities and differences positively or negatively. This booklet will be looking at gender inequality and how we can perhaps overcome and diverse the discrimination in sexism. SEXISM. The Sex Discrimination Act (SDA) is written in terms of discrimination against women but it applies equally to discrimination against men. These guidelines are written as if the discrimination applies to a woman but they should be read as also applying to a man. There are three types of discrimination which can apply to services. (Source from www. equalopportunitiescommission. o. uk). Direct sex discrimination Where a woman is treated less favourably than a man in similar circumstances because of her sex (s. 1 (1) (a) SDA). It is direct sex discrimination if: * financial institutions insist that a married woman who wants a loan must apply jointly with her husband (unless all married applicants are always required to apply jointly with their partners) Indirect sex discrimination Where a condition or requirement is applied equally to both women and men but, in fact, it adversely affects more women than men and is not genuinely necessary (s. 1 (1)(b) SDA). For example, it may be indirect sex discrimination if: * A mortgage provider only gives mortgages to people who work full-time. Although this condition would apply to both sexes it is likely to adversely affect more women than men since more women work part-time. Many part-time workers are in permanent, secure, well-paid jobs and some can earn more than full-timers, so a refusal to give mortgages or loans solely because the applicant works part-time is unreasonable. Victimisation Where a person has been treated less favourably compared to others because he/she made a complaint of sex discrimination. It also applies to those who assist the person. For example: A woman who took a sex discrimination claim under the employment provisions of the SDA against an amusement arcade was banned from using the facilities of the arcade. Witnesses who appeared for her at the employment tribunal were also banned. The woman and the witnesses would have a claim of victimisation against the owners of the arcade. (www. equalopportunitiescommission. co. uk) GENDER INEQUALITY. Sexism is a set of beliefs, practices and institutional structures which reinforces and is reinforced by patriarchy. A longstanding definition of sexism is: a deep rooted, often unconscious system of beliefs, attitudes and institutions in which distinctions between peoples intrinsic worth are made on the grounds of their sex and sexual roles (in Bullock and Stallybrass, 1977, p. 571). *†The achievement of equality between men and women is a matter of human rights and a condition of social justice†. Fourth UN World Conference on Women, Beijing, September 1995 (Department of Education and Employment, 1995). Sexism operates within a system of patriarchy. Patriarchy is one of the structural dimensions of society which is strongly associated with the sexist culture. This demeans and disempowers women and sows the seeds for the prejudice of women in terms of both attitudes and behaviour. Weber (1947) had used this concept to describe sexism. He used the term â€Å"the law of the father† to refer to the dominance of men within the family. The use of this term however, has been extended to describe the dominance of the males within the employment area and its reflection in the distribution of power. For example in the military forces, technology, universities, science, political and even religious sectors. (Such as the pope is and has always been male). So therefore, this suggests male dominance in most areas. Richard Webb and David Tossell (1999) report the following statements; *Women are an oppressed majority. *They represent up to 51% of the UK population, yet they do not have the same rights as men nor do they have the same access to resources as men do. * Women are less likely to obtain the same sort of jobs as men or positions of power. They earn less then men and are a lot more vulnerable to employment. They tend to be in less prestigious jobs and less secure forms of employment. This is mainly due to the discrimination that women are seen as the main â€Å"carer† role of the genders, being seen as the mother and the role to be the homemaker rather than the breadwinner, which is stereotypically seen as the male role. However, the biological differences within the roles are as such, that men are not able to conceive or give birth to children. Women, however do have that capability in being able to give birth and breast feed children. Barrett and McIntosh have argued that the family is oppressive to women and that it is an anti social institution. (Barrett and McIntosh 1982). They argue that the nuclear family promotes individualistic rather than social or collective values, and its privatised nature excludes those outside of it. *Women do more housework than men. The discriminatory process is known as structural sexism. This begins at birth and is maintained through childhood. Stereotypical roles are played within the family. While society is constantly changing and the attitudes towards equality are constantly being changed the ground in attitudes and beliefs are so firmly rooted the change is only very gradual. The gender role stereotyping in families are still abundant. For example, the mother stays at home to nurture the children whilst the father is out at work providing for the family. The girls tend to follow the role of the mother helping in household chores, such as cleaning and cooking, whilst the boys tend to follow the fathers role in helping fix the car or watching football! These social roles are defined within society, but because of the nature/nurture debate, they do appear to be biological differences and are therefore accepted and appreciated more easily. It is not just a matter of differences within the sexes. Abercrombie et al. 2000) argues that issues of gender (and gender inequality) now occupy a central place in sociological discussion. He quotes: â€Å"Gender is the social aspect of the differentiation of the sexes. Sociological discussion in this area recognises that social rather than biological processes are the key to understanding the position of women (and men) in society. Notions that a woman's biology, such as her capacity to bear children, determined the shape of her life have been replaced by complex debates as to how different social processes interact to produce a great variety of patterns of gender relations. Emphasis shifted towards understanding the diversity of the social practices which constitute gender in different nations, classes and generations. (p. 193). This statement clarifies that there are inevitable differences between the sexes. The roles that societies define are not going to change dramatically because of this huge, yet inconceivably big difference of males and females. Although the roles of women in society are changing in the aspects of work and relationships, the biological aspects of women are always going to remain the same. GENDER STEREOTYPING IN YOUTH GROUPS. The Brownie and Girl Guide Movement was set up as a youth group for girls. Originally, they were named the Rosebuds. The idea behind it was that the girls were fed up that the boys were allowed to have their own group, (the Boy Scouts) and the girls were left out of all the fun. The Rosebuds originally had to do menial feminine tasks, such as cooking, cleaning and sewing for the Scouts. Eventually the girls were not happy with the name Rosebuds and had the name changed to the Girl Guide Movement. The name Rosebuds in itself suggests the sexist views of women and girls, as the name is very feminine. The original tasks the girls had to do were based around helping the Boy Scouts, which also suggests the sexist way in which society viewed girls and women. The ideas and values which were instilled into the girls was that they were the homemakers. The Girl Guides had to make sure they always had their uniform clean and always came â€Å"prepared†. This still is a big motto within the movement. Years ago â€Å"being prepared† meant having certain items in your purse which included a safety pin and small sewing kit. This was not something the Boy Scouts had to do. The earning of badges is encouraged in the Movement as a way of setting up your independence for the future. However, the contrast in the types of tasks involved in the badges between the males and females are still quite divided. There are more homemaking badges within the girl guides, such as textiles, homemaking, which is the cleaning and organising of your home/bedroom for some weeks, childcare badge, tea badge, which involves the preparing of cakes, biscuits and tea for a fundraising event. These are still the most popular badges which are given out to the girl Guides. This is because the values and ideas within the movement have still not changed a huge deal from being the homemaker as they are females. The Movement now as it stands has changed immensely. The Girl Guide movement now encourages independence and camping as the Boy Scouts have been doing for many years. As a voluntary Youth Group the Girl Guide Movement empowers the girls to lead independent lives, encourages social relationships with both sexes, shows positive regard for each young person and provides opportunity for personal growth. This is quite a contrast from the once quite feminine ideas, role forming and principles which were once held. ANTI DISCRIMINATORY PRACTICE The way in which this is done is through a number of different policies that the youth leaders have all adhered to within the movement. The following are some suggested guidelines that could be given in order for the Youth group to be effectively run in a way that there may be less discrimination in the group. 1. Respecting individuality. 2. Trusting people 3. Encouraging good interpersonal and communication skills 4. Promoting positive social relationships 5. Young girls being involved in decision making 6. Providing a range of group work and social activities, including community involvement and more involvement within the Scouting activities. 7. The use of youth's meetings to enable people to have an opportunity to influence and assist with planning, especially the young females, who have been previously excluded from or uninvolved in other activities. 8. Principles of inclusion independence and enablement are key issues. Alongside these principles, a staff team that is working together, receiving supervision opportunities for learning and development, is required. Also to understand the need to work collaboratively by supporting multi professional and agency working. I feel that these policies are very important in all work. However with the involvement of young girls and women, it is important not to categorise their roles into somewhat of a homemaker role. To allow the girls to develop and flourish their own ideas and principles within the group they are involved and to develop these attitudes within their home environment is a positive way of diversing the discrimination females have within society.

Kennedy essays

Kennedy essays The 1960's proved to be a period of both social and political upheaval, whereby hippies, college students and the average American attempted to regain some control through their demonstrations. It was a time where the Government seized the rights of the people to maintain some stability in a period of social turmoil. An era in American history with political resistance from other nations was more important to bring stability to then how the American people felt about the whole situation. How could American citizens be fond of a government that does not pay attention to their needs? The only part of the Government that they were fond of was the Executive side of the government: President Kennedy. When our forefathers drew up the constitution, their main aim was to create a government "of the people, for the people, and by the people." However as our country developed, the government strived to control more aspects of its governing body. President Eisenhower warned Americans against the growing Military Industrial Complex in the 1950's, and his premonition proved to be accurate. In the movie JFK, the director Oliver Stone suggests the government was dictating the fate of the world without our consent. It suggests eight possible causes of Kennedys death: the CIA, weapons manufacturers, the Dallas police, the armed forces, the White House, the establishment press, renegade anti-Castro Cubans, and the Mafia. All of these groups have one common goal, to get revenge for their past maltreatment that Kennedy has bestowed upon them. Only the most dominant force could ever kill Kennedy, which in many public opinions was the White House. November 22, 1963 was a day that people will remember for the rest of their lives. John F. Kennedy was shot dead in Dallas, Texas while many adoring Americans watched with disbelief. How could this ever happen to the man that mean so much to our nation? Who could commit such a horrible act tha...

The Unsolved Case of the Zodiac Killer

The Unsolved Case of the Zodiac Killer The Zodiac Killer was a serial killer who stalked parts of Northern California from December 1968 through October 1969. Through a series of cryptic letters he sent to the press and others, he disclosed his motivation for the killings, offered clues to future murder plots, and adopted the nickname Zodiac. He took responsibility for murdering as many as 37 people, but police investigators have only confirmed five deaths and seven total attacks.   December 20, 1968   Betty Lou Jensen, 16, and David Arthur Faraday, 17, were parked at a secluded spot located on Lake Herman Road on the eastern side Vallejo, California. Witnesses noticed the young couple huddled together in the front seat of Faradays Rambler station wagon between around 10:15 and 11:00 p.m. Nothing about the couple seemed unusual to bystanders. But by 11:15 the scene had taken a tragic turn. The couple was discovered lying on the ground outside their bullet-riddled car. Betty Lou was found several feet from the car, dead from five gunshot wounds in the back. David was found closeby. He had been shot at close range in the head  but was still breathing. He died  en route to the hospital. Clues Detectives had few clues, aside from the fact that there was an earlier confrontation in the same area. Bill Crow and his girlfriend were parked in the same place as Faraday and Jensen just 45 minutes earlier. Crow told police that someone driving a white Chevy drove past them, stopped, and backed up. For unknown reasons, Crow sped away in the opposite direction. The Chevy turned around and followed the couple, but was unable to keep up after Crow made a sharp right turn at an intersection. Two hunters also reported seeing a white Chevy parked at a gravel turn-around on Lake Herman Road. They approached the car but did not see the driver inside. July 4, 1969   Darlene Elizabeth Ferrin, 22, and Michael Renault Mageau, 19, were parked at the Blue Rock Springs Golf Course in Benicia around midnight. The golf course was four miles from where Jensen and Faraday were gunned down. A car pulled up behind the couples car, blocking them from driving away. A man, who Mageau believed was a police officer, got out of his car holding a bright flashlight that obscured his face. As the stranger approached the drivers side of the car he immediately began shooting at the couple, firing five nine-millimeter rounds into the car. Both Ferrin and Mageau were shot. The shooter turned to leave  but came back after hearing shouts coming from Michael. He fired four more times. One bullet hit Michael and two struck Darlene. The shooter then got into his car and drove away. Within minutes after the attack, three teens came across the couple and hurried to get help. When authorities arrived both Ferrin and Mageau were still alive, but Ferrin died before reaching the hospital. Clues Michael Mageau survived the attack and was able to give a description of the shooter to authorities. He described the attacker as a short, heavyset white man, about 5 8 and around 195 pounds. The Call At 12:40 a.m. an anonymous male caller contacted the Vallejo Police Department and reported the double murder. During the call, he also said he was responsible for the Jensen and Faraday murders. Police traced the call and found it was made from a phone booth located just blocks from the police department and less than a mile from Darlene Ferrins home. The caller told police: I wish to report a double murder. If you will go one mile east on Columbus Parkway to a public park, you will find the kids in a brown car. They have been shot by a nine-millimeter Luger. I also killed those kids last year. Good-bye The Zodiac Letters On Friday, August 1, 1969, the first known Zodiac letters were received by three newspapers. The San Francisco Examiner, San Francisco Chronicle,  and Vallejo Times-Herald each received an almost identical letter written by a person who took credit for the attacks on the four teens. He also gave details about the murders and included one-third of a mysterious cipher in each letter. The self-proclaimed killer demanded that the three letters be published on the front page of each newspaper by that Friday afternoon or he would go on a rampage and randomly kill a dozen people over the weekend. The letters were signed with a crossed-circle symbol. The letters were published and efforts to untangle the messages in the ciphers began by authorities and citizens. August 4, 1969 Police investigators stated publicly that they had doubts as to the authenticity of the letters in an attempt to get the killer to contact them again. The plan worked. On August 4th, another letter arrived at the San Francisco Examiner. The letter began with the words that have since haunted many involved in the case: Dear Editor This is the Zodiac speaking... It was the first time the killer used the name Zodiac. In the letter, the Zodiac included information which proved he was present during the murders and a message that his identity was hidden inside the ciphers. August 8, 1969 A high school teacher and his wife cracked the 408-symbol cipher. The last 18 letters could not be decoded. The message read: I LIKE KILLING PEOPLE BECAUSE IT IS SO MUCH FUN IT IS MORE FUN THAN KILLING WILD GAME IN THE FORREST BECAUSE MAN IS THE MOST DANGEROUE ANAMAL OF ALL TO KILL SOMETHING GIVES ME THE MOST THRILLING EXPERENCE IT IS EVEN BETTER THAN GETTING YOUR ROCKS OFF WITH A GIRL THE BEST PART OF IT IS THAE WHEN I DIE I WILL BE REBORN IN PARADICE AND THEI HAVE KILLED WILL BECOME MY SLAVES I WILL NOT GIVE YOU MY NAME BECAUSE YOU WILL TRY TO SLOI DOWN OR ATOP MY COLLECTIOG OF SLAVES FOR MY AFTERLIFE EBEORIETEMETHHPITI. The fact that the code did not contain the killers identity was a disappointment to the police, however, some believe the letters can be rearranged (and three more letters added) to spell Robert Emmet the Hippie. September 27, 1969   College students, Cecelia Ann Shepard, 22, and Bryan Calvin Hartnell, 20, were picnicking on a peninsula at Lake Berryessa near Napa, Ca. A man carrying a semi-automatic pistol and wearing a hooded costume approached the couple. He told them that he was an escaped convict from a Montana prison where he killed a guard and stole a car and that he wanted money and their car to drive to Mexico. The couple was cooperating fully with his demands, offering him money and the car keys and the three talked for  a while. He instructed Shepard to hog-tie Bartnell with precut pieces of a clothesline that he supplied. He then tied up Shepard and told the couple, Im going to have to stab you  people, and took out a long double-edged knife and stabbed Hartnell six times and Shepard ten times. He left the couple for dead and walked casually back to Hartnells car where he drew a crossed-circle symbol in black magic marker on the side of the car and the dates of the attacks in Vallejo. A  fisherman  discovered the couple and called the police. Both victims were still alive, but it took over an hour for medical help to arrive. Shepard died two days later after lapsing into a coma. Hartnell survived and gave police a detailed account of the events as well as a description of the attacker. The Call At 7:40 p.m. an anonymous caller contacted the Napa County Police Department. He spoke to officer David Slaight in what was described as a low, monotone voice. He told Slaight: I want to report a murder - no, a double murder. They are two miles north of park headquarters. They were in a white Volkswagen Karmann Ghia... and ended the call with, Im the one who did it. As in the Vallejo case, the call was traced to a phone booth just a few blocks from the police department. October 11, 1969   San Francisco cab driver Paul Stine, 29, picked up a passenger in Union Square and drove to the wealthy area of Cherry Street and Nob Hill. It was there that the passenger shot Stine in the temple, killing him, then removed his wallet, car keys and carefully tore off a large portion of his shirt. Three youngsters witnessed the event from a second-floor window across from the parked taxi. They contacted the police and described the  shooter  as a  white male, 25 to 30 years old, stocky build and a crew cut. An intensive manhunt was immediately launched, but somehow there was a mistake made as to the killers race and the police were searching for a black male. How this mistake was made was never reported and no one was ever apprehended for the  crime. It was later determined that police drove by a large white male fitting the original description just blocks from the shooting, but because of his  race, the police did not consider him a suspect. October 14, 1969 The Chronicle received another letter from the Zodiac. A piece of Stines  blood-soaked  shirt was enclosed and the author referred to the Stine murder, saying the police failed to catch him because they did not search the area properly. He then pointed to his next intended victims, school children. October 22, 1969 A caller identifying himself as the Zodiac contacted the Oakland Police Department and demanded on-air time on the Jim Dunbar television talk show with F. Lee Bailey or Melvin Belli, both famous defense lawyers. Belli appeared on the show and a call from someone saying they were the Zodiac came in while the show was being televised. He said his real name was Sam and asked that Belli meet him in Daly City. Belli agreed but the caller never showed. It was later determined that the call was a hoax and the imposter was a  mental patient  at the Napa State Hospital. November 1969 On November 8 and 9, the Chronicle received two Zodiac letters. The first one was a 340-character cipher. The second letter was seven pages long and included another piece of Stines shirt. In the letter, he claimed the police had stopped and talked with him three minutes after he shot Stine. He also drew a schematic of what he referred to as his death machine which was made to blow up large objects such as buses. December 20, 1969 Melvin Belli received a Christmas card at his home which included another piece of Stines shirt. In the card the Zodiac claimed he wanted help from Belli, ending with: Please help me I can not remain in control for much longer. Attempts from Belli to get the Zodiac to contact him again were made, but nothing ever happened. Some speculate that the card was written during a moment of clarity, while others believe it was another attention-getting hoax on the part of the Zodiac. March 22, 1970 On the evening of March 22, 1970, Kathleen Johns, who was eight-months pregnant, was on her way to meet her mother. She had her ten-month-old daughter in the back seat of the car. While on Highway 132 in San Joaquin County, west of Modesto, Johns pulled over after a driver pulled up alongside her and indicated that something was wrong with her car. The driver pulled over and told Johns that her wheel was wobbling. He said he would tighten the wheel bolts, but instead loosened them, then returned to his car and drove off. When Johns pulled away her tire fell off. The man in the car was not far ahead and backed up and offered Johns a ride to a gas station. She agreed  but became frightened when he failed to stop  at several  gas stations. The ride took over three hours of what Johns described as, silent aimless driving around. She was able to escape with her child when the driver stopped at an intersection. Johns fled across a field and hid until she saw the man drive away. She received help from a passerby and was taken to the local police department in Paterson. While at the station she saw a  wanted poster  with a composite sketch of the Zodiac and identified the person as the man who kidnapped her. Her car was later found gutted and burned. Throughout the years, Johns account of the nights events has changed from her original statement, leading some to question her story.   This was the last time anyone ever reported seeing the Zodiac. April 20, 1970 The Zodiac sent a letter to the Chronicle which included a 13-character cipher, a diagram of a bomb he planned to use to blow up a school bus, and a statement that he was not responsible for the February 18, 1970, bombing of a police station in San Francisco. He ended the letter with a score  [Zodiac Symbol]10, SFPD0. Authorities interpreted the number ten as a body count.   April 28, 1970 A card was sent to the Chronicle with the words,  I hope you enjoy yourselves when I have my BLAST  along with the cross-circle symbol. On the back of the card, the writer threatened to use his bus bomb if the Chronicle failed to publish the April 20 letter he sent detailing his plans to blow up a school bus. He also requested that people begin wearing Zodiac buttons. June 26, 1970 A letter received  at  the Chronicle contained another 32-letter cipher. The author said he was upset that he had not seen people wearing Zodiac buttons. He took credit for another shooting  but gave no specifics. Investigators suspected it was the shooting death of Sgt. Richard Radetich a week earlier. Also included was a Phillips 66 map of the Bay area. A clock-like face was drawn around Mount Diablo with a zero at the top, the number three on the right side, six on the bottom and a nine of the left side.  Next  to the zero, he wrote,  is to be set to Mag.N. The map and the cipher were supposed to give the location of a bomb he buried that was set to go off the following fall. This letter was signed  [Zodiac Symbol]12. SFPD0. July 24, 1970 In this letter, also sent to the Chronicle, the Zodiac took credit for abducting Kathleen Jones four months earlier and described burning the car, a fact that only one local paper, the Modesto Bee, had printed. July 26, 1970 In this next letter, the Zodiac included his own twisted version of the song  Ive Got a Little List  from Gilbert Sullivans musical, The Mikado. In it, he described how he planned to collect and torture his slaves. Also drawn on the letter was a giant crossed-circle, a score notation of  13, SFPD  and the words, PS. The Mount Diablo Code concerns Radians # inches along the radians. In 1981, Zodiac researcher Gareth Penn figured out that when placing a radian angle over the map, it pointed to two locations where Zodiac attacks took place. October 5, 1970 Three months had passed without any further communication from the Zodiac. Then, a card written with cut-out letters from magazines and newspapers was sent to the Chronicle. The card bore 13 holes and indicated that there had been another Zodiac victim and that he considered himself crackproof. Originally considered as a hoax, certain letter configurations and the phrase crackproof later reappeared in confirmed Zodiac letters, adding new authenticity to this one. October 27, 1970 Paul Avery, the key reporter in the Zodiac case for the Chronicle, received a Halloween card which included a threat on Averys life. The letter was posted in its entirety on the front page of the Chronicle and days later Avery received another letter urging him to investigate the similarities between the known Zodiac murders and the murder of college student Cheri Jo Bates years earlier. A Step Back In Time - October 30, 1966   On October 30, 1966, Cheri Jo Bates, 18, was studying at the Riverside City College library annex until the library closed at 9 p.m. Investigators suspect that her Volkswagen parked outside the library was tampered with prior to her leaving the library. The distributor coil and the condenser had been pulled out and the middle wire of the distributor was disconnected. Police believe that when she tried to start the car the person who disabled it approached her and offered his help. Somehow he lured her into a secluded dark driveway which sat between two empty houses, where police believe the two sat for about an hour and a half. The man later attacked Bates, beating her, slashing at her face and cutting her a total of 11 times, seven of which nearly decapitated her. Clues found at the scene included a size 10 heel-print, a Timex watch with a torn seven-inch wristband displaying the time 12:23, fingerprints and a palm print, skin tissue underneath the victims fingernails and hair and blood in her hands. On November 29, 1966, two identical letters were sent to the Riverside Police and the Riverside Press-Enterprise by someone claiming to be responsible for killing Bates. The letters included a poem titled  The  Cofession[sic] which offered details of the murder that only the police and the killer knew about. The letters also included a warning that she was not the first or the last of his victims. Many interpreted the tone of the letter as very similar to that of the Zodiac letters mailed after the Vallejo murders. In December 1966 a custodian at the Riverside City College discovered a poem carved into the underside of a folding desk. The poem, titled  Sick of living/unwilling to die  had a tone similar to that of the Zodiac as well as handwriting which looked like some found in the Zodiacs letters. Some believe the author, who signed the poem with the initials rh was describing the murder of Bates. Other theorize that the letter was written by a student who had unsuccessfully tried to kill themselves. However, Sherwood Morrill, one of Californias top Questioned Documents examiners, was of the opinion that the true author of the poem was the Zodiac. Six months after the murder of Bates three nearly identical letters were received by the Riverside Press, the Riverside police  and  Cheri Jo Bates father. The letters all contained more postage than was necessary and two of the letters were signed with a symbol which looked like the letter Z next to the number three. The Zodiac letters sent in the 1970s all contained excessive postage, symbol-type signatures and the threat that more murders would follow. The two letters received by the newspaper and the police read: BATES HADTO DIETHERE WILLBE MORE Bates murder was never solved. The Riverside Police Department maintains that a local man was the key suspect, not the Zodiac, although the letters sent may have been written by him. March 17, 1971 A letter was sent to the Los Angeles Times because, as the writer put it,  they dont bury me on the back pages. In the letter, the Zodiac gave the police credit for making the Bates connection, but added that the police were still only finding the  easy ones  and that there were plenty more  out there.  The letter included the score,  SFPD-0 [Zodiac Symbol]-17. This was the only letter ever sent to the Los Angeles Times and the only one postmarked outside of San Francisco. March 22, 1971 Chronicle reporter Paul Avery received a postcard thought to be from the Zodiac in which he took credit for the case of a missing nurse, Donna Lass, from the Sahara Hotel and Casino. Lass was never seen again after treating her last patient at 1:40 a.m. on September 6, 1970. The following day her uniform and shoes, marked with dirt, were discovered in a paper bag in her office. Two calls were made, one to her employer and one to her landlord, by an unidentified caller who said Lass had a family emergency and had left town. The postcard that Avery received included a collage made up of lettering cut from newspapers and magazines and contained a picture of an ad of the condominium complex known as Forest Pines. The words,  Sierra Club, Sought Victim 12, peek through the pines, pass Lake Tahoe areas, round in the snow,  hinted at the location of where Lass body could be found. A search in the area turned up only a pair of sunglasses. Some believe the postcard was a forgery, perhaps the attempt of the real killer to make the authorities believe Lass was a Zodiac victim. However certain similarities such as the misspelling of Paul Averys name (Averly) and the use of a hole-punch had both become traits found in letters known to be from the Zodiac. Although it did not appear that  kidnapping  was a pattern of the Zodiac, but rather spontaneous random murders, if in fact, he was responsible for Johns abduction then possibly Donna Lass could also be a victim of the Zodiac. The  mystery  surrounding the case of Donna Lass was never solved, nor was her body ever located. The Pines postcard was the last communication received from the Zodiac for three years. In 1974 he resurfaced although this time he dropped his opening line,  This is the Zodiac speaking  and the cross-circle symbol signature from the letters. January 29, 1974 The Zodiac sent the Chronicle a letter describing the movie  The Exorcist  as  the best saterical comidy that I have ever seen.  It also included a part of a verse from The Mikado, a hieroglyph-type drawing and a threat that the letter had to be published or he would  do something nasty.  His signature score changed to read  Me-37 SFPD-0. May 8, 1974 The Chronicle received a letter from a concerned citizen complaining about the movie  Badlands  and asking the paper to stop advertising it. Although the Zodiac did not identify himself as the author of the letter, some felt the similarities of the tone and handwriting was unmistakably that of the Zodiac. July 8, 1974 A complaint letter regarding the conservative Chronicle columnist, Marco Spinelli who used the pen name, Count Marco was received at the newspaper and ended the letter with: Since the Count can write anonymously, so can I signed the Red Phantom (red with rage). Some believe the Zodiac sent the letter, others do not. Doubting that the letters were really authored by the Zodiac, police detective David Toschi sent them to the FBI Laboratory who responded that the letters were probably prepared by the writer of the Zodiac letters. No other communication was received from the Zodiac for another four years. April 24, 1978 A letter was sent to the Chronicle and given to reporter Duffy Jennings, Paul Averys replacement after he went to work at the San Francisco Examiner. Duffy contacted Detective David Toschi, who had worked on the Zodiac case since the Stine murder and was the only remaining San Francisco Police Department (SFDP) investigator working the case. Toschi turned the letters over to John Shimoda of the U.S. Postal Service crime laboratory to verify if the letters were authored by the Zodiac instead of giving them to the chief examiner for the Questioned Documents Division of the SFPD. Why he made that decision is unknown, however, Shimoda did verify that the letter was authored by the Zodiac. Four experts three months later declared the letter a hoax. At that time Toschi was in the middle of a political battle and looking at possibly replacing the current chief of police. For all of those who adored Toschi, many just wanted him to go away. When it became known that the letters were a hoax, many pointed the finger at Toschi, believing he had forged the letter. The suspicions about Toschi  forging  the Zodiac letter was based on an earlier incident involving columnist Armistead Maupin, who was writing a series for the Chronicle called,  Tales of the City.  He received a lot of fan mail for the series and in an effort to verify that the letters were legitimate he became suspicious that Toschi had written some of them under fake names. Maupin made the decision to do nothing about it at the time, but when the forged Zodiac letter surfaced, Maupin thought it was possible Toschi was responsible and reported the fake fan letters and his suspicions to Toschis superiors. Toschi eventually admitted to writing the fan letters, but always denied the implications that he forged the Zodiac letter and insisted the rumors were politically motivated. The Toschi incident is just one example of the many bizarre twists the Zodiac investigation has taken over the years. More than 2,500 suspects have been investigated without anyone ever being charged. Detectives continue to receive telephone calls weekly with tips, theories​,  and speculation. The  case  remains open in some jurisdictions, but the San Francisco Police Department has designated it  unsolved  and inactive.