Introduction to Routing and Switching Essay Example for Free

Introduction to Routing and Switching Essay 1. Introduction – Computer Network A computer network is a setup which comprises of multiple computers and devices to create connection in order to support the communication of all such devices. This facilitates sharing of information and resources to all the users present in the network. The following are the main purposes that the network provides to its users:  · Communication- networks allow free flow of communication among all the users. These include chat, messages, emails, conferences, etc.  · Sharing of Resources – Resources can be shared among all the users within a network. These include: o Hardware The different computers in a network can also make use of a single hardware attached to the network. Consider the example of a shared printer attached to multiple devices in the network like in case of a university or office environment. o Software- Network also allows users to share software application programs through their computers o Files and other data – Files and data can be shared among systems in a network environment through authorized access. This helps members to work and submit tasks on the same domain and within deadlines, thus saving from hassles. 2. The Open Systems Interconnection OSI Model The hardware components of the network operate at the layers of the OSI model which are briefly discussed below: Physical layer This is concerned with the functions that carry a stream of bits over a physical medium at the mechanical and electrical level. Hubs and Repeaters operate at the physical layer of the OSI model. Data link Layer This layer categorizes data from network layer (upper layer) into frames and handles errors of the physical layer to provide to the network layer. The Bridges operate at the Data link layer of the OSI Model. Network Layer The delivery of the packet is the responsibility of the network layer which can include multiple links. Network layer can be used in cases of multiple networks where there are some links between the networks. Routers operate at the Network layer of the OSI model. Transport Layer The transport layer is also responsible for delivery of packets but it also recognizes relationship between messages. This is done in proper order and the layer also ensures control of error and flow at the source as well as the destination. Session Layer This layer controls dialog and synchronizes interaction within the network. Presentation Layer This layer is also one of the most important layers as it is looks into the syntax and semantics of the data being transferred within the network. Application Layer This layer involves interfaces and other supporting frames for the user to access the network. 3. Hardware Components within a Network The following re the basic hardware components within a network to interconnect devices (Sosinsky 33): 3.1 Network Interface Cards (NICs) These are the components used to connect to another networking medium. The NIC has a unique identification number known as Media Access Control address (MAC address) that is provided by the manufacturer. 3.2 Repeaters Repeater is a device used to transmit signals after cleaning them by regenerating the original bit pattern. 3.3 Hubs Hub connects multiple devices in the network so that they appear as a single device, therefore, it has multiple ports. 3.4 Bridges These are also hardware components that connect multiple segments of the network. 4. Network Hardware Components – Routers and Switches Routers and switches are important components of the computer network that support the above mentioned purpose of a network. These are discussed in details as under: 4.1 Routers Router is a software or device that helps in transmitting data between users in a predefined manner, thus helping in serving the purpose of the network. The data is in the form of packets that travels along the network, where the routers process the data present in the packet. In many cases there is a pre-defined forwarding or routing table used to direct the information to the appropriate destination (Beasley 62). The main tasks of the routers include:  · Ensures information forwarding to the required destination  · Keeps track and avoids information from reaching where not needed 4.1.1 Characteristics The following are the characteristics of Routers:  · The routers correspond to internet Protocols such as the internet Protocol, internet Control message Protocol, etc.  · Provides interfaces between the packet networks through the required functions  · Sends and receives datagrams  · Chooses destination for the datagram according to the routing database  · Provides support facilities for network management which includes status and exception reporting, debugging, etc. 4.1.2 Routing Routing is the process of sharing information by connecting networks and translating protocols between them. It functions at the network layer of the OSI model, acquiring addresses from the IP header of the layer to get the sources and destination. Here the Routing Protocols are used. Routers also use the routing tables to decide the destination of the packets. The routing tables include:  · Address information  · Connection Priorities  · Traffic Rules Routing differs in its delivery schemes which include the following:  · Delivery to a single node (unicast) where the node is predefined.  · Delivery to multiple specified nodes (multicast)  · Delivery to all the nodes that are part of the network (Broadcast)

Twelve Angry Men | Film Analysis

Twelve Angry Men | Film Analysis The jury of twelve angry men, entrusted with the power to send an uneducated, teenaged Puerto Rican, tenement-dwelling boy to the electric chair for killing his father with a switchblade knife, are literally locked into a small, claustrophobic rectangular room on a stifling hot summer day until they come up with a unanimous decision either guilty or not guilty. The compelling, provocative film examines the twelve mens deep-seated personal prejudices, perceptual biases and weaknesses, indifference, anger, personalities, unreliable judgments, cultural differences, ignorance and fears, that threaten to taint their decision-making abilities, cause them to ignore the real issues in the case, and potentially lead them to a miscarriage of justice. The Prosecutions Case: At the beginning of the play, eleven of the jurors believe that the boy killed his father. They summarize the compelling evidence of the trial: A 45 year old woman claimed she witnessed the defendant stabbing his father. She watched through her window as the citys commuter train passed by. An old man living downstairs claimed that he heard the boy yell Ill kill you! followed by a thump on the floor. He then witnessed a young man, supposedly the defendant, running away. Before the murder took place, the defendant purchased a switchblade, the same type that was used in the murder. Presenting a weak alibi, the defendant claimed he was at the movies at the time of the murder. He failed to remember the names of the films. Finding Reasonable Doubt: Juror #8 picks apart each piece of evidence to persuade the others. Here are some of the observations: The old man could have invented his story because he craved attention. He also might not have heard the boys voice while the train was passing by. Although the prosecution stated that the switchblade was rare and unusual, Juror #8 purchased one just like it from a store in the defendants neighborhood. Some members of the jury decide that during a stressful situation, anyone could forget the names of the movie they had seen. The 45 year old woman had indentations on her nose, indicating that she wore glasses. Because her eyesight is in question, the jury decides that she is not a reliable witness. Characters: Juror 1 (Foreman; coach)Martin Balsam Non-confrontational, Juror #1 serves as the foreman of the jury. He is serious about his authoritative role, and wants to be as fair as possible. Juror 2 (Bank clerk; inexperienced juror)John Fiedler He is the most timid of the group.Juror #2 is easily persuaded by the opinions of others, and cannot explain the roots of his opinions. Juror 3 (Angry gentleman with photo of son)Lee J. Cobb In many ways, he is the antagonist to the constantly calm Juror #8. Juror #3 is immediately vocal about the supposed simplicity of the case, and the obvious guilt of the defendant. He is quick to lose his temper, and often infuriated when Juror #8 and other members disagree with his opinions. He believes that the defendant is absolutely guilty, until the very end of the play. During Act Three, Juror #3s emotional baggage is revealed. His poor relationship with his own son may have biased his views. Only when he comes to terms with this can he finally vote not guilty. Juror 4 (Stock Broker)E. G. Marshall A logical, well-spoken stock-broker, Juror #4 urges fellow jurors to avoid emotional arguments and engage in rational discussion. He does not change his vote until a witnesss testimony is discredited (due to the witnesss apparently poor vision). Juror 5 (Grew up in the slums)Jack Klugman This young man is nervous about expressing his opinion, especially in front of the elder members of the group. He grew up in the slums. He has witnessed knife-fights, an experience that will later help other jurors form an opinion of not guilty. Juror 6 (Painter)Edward Binns Described as an honest but dull-witted man, Juror #6 is a house painter by trade. He is slow to see the good in others, but eventually agrees with Juror #8. Juror 7 (Sports fan)Jack Warden A slick and sometimes obnoxious salesman, Juror #7 admits during Act One that he would have done anything to miss jury duty. He represents the many real-life individuals who loath the idea of being on a jury. Juror 8 (Architect; Man who doesnt know)Henry Fonda He votes not guilty during the jurys first vote. Described as thoughtful and gentle, Juror #8 is usually portrayed as the most heroic member of the jury. He is devoted to justice, and is initially sympathetic toward the 19-year-old defendant. At the beginning of the play, when every other juror has voted guilty he is the only one to vote: not guilty. Juror #8 spends the rest of the play urging the others to practice patience, and to contemplate the details of the case. A guilty verdict will result in the electric chair; therefore, Juror #8 wants to discuss the relevance of the witness testimony. He is convinced that there is reasonable doubt. Eventually he persuades the other jurors to acquit the defendant. Juror 9 (Nice older gentleman)Joseph Sweeney Described in the stage notes as a mild, gentle old man, defeated by life and waiting to die. Despite this bleak description, he is the first to agree with Juror #8, deciding that there is not enough evidence to sentence the young man to death. Also, during Act One, Juror #9 is the first to openly recognize Juror #10s racist attitude, stating that, What this man says is very dangerous. Juror 10 (Prejudiced older gentleman with cold)Ed Begley The most abhorrent member of the group, Juror #10 is openly bitter and prejudice. During Act Three he unleashes his bigotry to the others in a speech that disturbs the rest of the jury. Most of the jurors, disgusted by #10s racism, turn their backs on him. Juror 11 (Foreign watchmaker)George Voskovec As a refugee from Europe, Juror #11 has witnessed great injustices. That is why he is intent on administering justice as a jury member. He sometimes feels self-conscious about his foreign accent. He conveys a deep appreciation for democracy and Americas legal system. Juror 12 (Advertising Executive; doodler)Robert Webber He is an arrogant and impatient advertising executive. He is anxious for the trail to be over so that he can get back to his career and his social life. EFFECTIVE LEADERSHIP BEHAVIOUR Juror 8 In this movie, Juror 8 emerged as a leader because he gains respect by other jurors. At the beginning of the movie, he is the only one to vote not guilty during the jurys first vote. It is because he is convinced that there is a reasonable doubt. He wanted to talk about seriousness of the case without emotionally pre- judging the 18 year old boy. He showed empathy by asking other jurors to imagine themselves in the boys shoes awaiting death sentence, physically abuse by his father, growing up in the slums and etc. Juror 8 convince the other jurors that the boy isnt guilty by persuading them in a calm manner .He stay calmed and talked over the evidence presented by the prosecution and finding flaws in it. Juror 8 analyzed every detail of the evidence with the other jurors. He was presenting calm and used logical theories about why he has doubt that the boy didnt kill his father. As Juror 8 always stay calm, polite and respectful, many of the other jurors are persuaded easier and prefe r to side with him rather than juror 3 and 10. He persuaded almost half of the jurors to vote not guilty towards the middle of the movie. He elaborated what every juror was trying to say and making suggestions to keep the group focus even thought it was a long and tedious process. Juror 8 focus on task oriented approach .He does not seek status or ego enhancement. In this movie, he used a lot of questioning skill and able to lead other juror to analyze the evidence in a concrete manner. He encourages the jurors to think in bigger picture: defendants background, witnesss credibility, defending attorneys motives and etc. He asked jurors to put aside their personal biases, and stressing the importance of resuming their responsibility seriously. He aims for group success. As time passes, other jurors adopt his strategies. Together, they synergistically find flaws in the trials evidence and reached informed conclusions eventually. Juror 8s interpersonal style is classified as open receptive and objective. This leadership trait is extremely effective in questioning other jurors motives and their views .It helped bring out an efficient jury in this case. Throughout the movie, he openly admitted that he did not know if the boy indeed killed his father. Instead, he solicited feedback from other jurors in order to make an accurate decision. He encouraged others to discuss their doubt on the case and he was ready to receive feedback. He guided other jurors to make decision based on facts and conscience, and not using rush judgment and personal prejudice. Task Oriented Behaviour Juror 8 has throughout this movie, at various occasion, showed consistency in clarifying the objective that is expected of the group. Where most jurors started with the notion that the task at hand was simply to determine whether the accused is guilty or not and based their judgements on various reasons and emotions, juror 8 clarified that the objective of the group was to establish whether or not there exist reasonable doubt with the evidence and arguments presented during the court hearing. The first 15 minutes of the movie sees Juror 1 exhibiting promising leadership potential. In the beginning when the jurors first came back to their room after the deliberation in court, he was the first to organise the group. Juror 1 showed many examples of task-oriented behaviour. He organised ballots, organised seating arrangements and called for a start. These are example of organizing work activities to improve efficiency, and short-term operations planning. Relations Oriented Behaviour In the beginning, Juror 8 did not seem to show much of relations oriented behaviour, and therefore did not seem to make much of an influence. Many other jurors seemed to display more extrovert personalities and socialized more among their peers. At this time, Juror 1 already showed significant amount of relations-oriented behaviors. For example, he suggested a 5 minutes break in consideration for the gentleman in the washroom. He also consulted with other jurors, asking them for their suggestions on how they wanted to start, whether to discuss or to take a quick vote first. He provided support and encouragement to Juror 12 when Juror 12 seems to lack the confidence after he suggested the idea for the 11 jurors to convince Juror 8 of their arguments why they think the boy is guilty. Change Oriented Behaviour Juror 8 showed by far the most and strongest change oriented behaviours throughout the length of this movie. The first instance of this is after the first vote where he alone votes for a not guilty verdict. When he was asked to clarify his decision he encouraged the other jurors to view the case at hand differently. He articulated that its a big decision that they have to make since its a life at stake and that he is not comfortable to make such a decision in less than 5 minutes. Juror 8 also took some risk and experimented with a creative approach to make a point across to the other jurors. First he asked to view the knife again. When the knife was made available and all the other jurors were convinced that the knife was quite unique, Juror 8 took out an identical knife that he bought and manages to grab everybodys attention. Although owning a switch blade knife is illegal, he took this risk in return for a firm foothold into challenging the pre-conceptions of the other jurors. Afte r this event, he gained a vote for not guilty. INEFFECTIVE LEADERSHIP BEHAVIOUR Juror #3 Juror #3 has been informed to be a juror via mail like everyone else for this case. As he is the most important counterpart to juror #8 we will have a closer look at him. In the following we will characterize him and point out important scenes. This will be supported by a look at the body language and rhetoric. We will show inwhich leadership style juror #3 can be categorized and what mistakes have been done. In the end we will point out how juror #3 could have avoided his ineffective leadership style. We will begin with characterizing juror #3 and explaining his role within the jury. He is used to having authority from his work, because,as the owner of a messenger service, he has 37 subordinates that listen to him.At the very beginning he is pointing this out and shows that he is proud of his achievement. In the discussion he behaves like he is at his workplace where he can order people around and has the authority to do so. The only time he shows respect to anyone is when he is speaking about his father and how he used to call him Sir. In this scene he also shows how preoccupied he is about the youth and therefore also about the defendant. Juror #3 thinks that the youth shows no respect nowadays and is reminded of his own son. When his son at an early age was running away from a fight, he swore that he would make a real man out of him. After a couple of years this behavior has led to a fight where he got hit by his son. Since 2 years there was no relationship between them and it is very clear that the relationship to his son is affecting the decisions of juror #3. From the start juror #3 has expressed disrespect, aggressiveness and ignorance, but all these attitudes were becoming worse when he saw that more jurorswere changing their minds and more jurorswere openly showing dislike towards him. The later it gets, the louder he speaks. Of course this results in the fact that other jurors like him even less.Juror #8 uses this and provokes him to isolate him even more. A crucial point in the play is when juror #8 is attacking juror #3 verbally. #8 calls him a sadist and being confronted like that he tries to attack #8 physically. The other jurors hold him back so that he cannot reach #8. In this scene he also cries out that he will kill #8, which supports one the argument of juror #8 that you do not always mean what you say and do not necessarily act accordingly. After this incident juror #3 tries to change his tactics a little bit. He is still loud and disrespectful, but in two situations he tries to influence other jurors while speaking to them alone. In the first instance he tries to justify the attacking of juror #8 and in the second one he tries to convince everyone to call for a hung jury. His new behavior shows that he is realizing that his position within the group has changed. He tries new methods in order to turn the situation around. It does not succeed because he has lost all trust among the other jurors. In the end he is the last of the jurors to plead guilty. At the first pressure to defend his arguments he crumbles. A last outburst of his anger shows his hidden agenda. He is not able to change his mind and admit that he has been wrong. Looking at the picture of him together with his son he realizes that he has done wrong with him and he tears the picture apart. Immediately he regrets his action as it is probably the only picture of them together. The action lets him admit what to him looks like a defeat. He pleads not guilty as well. Finally he breaks down crying on the table. Juror #3 can be described best as an authoritarian/autocratic leader. He tries to use his authority to make the decision basically on his own. Of course this has to fail, because he does not have the authority in the first place and has not the ability to gain the authority as well. As already mentioned he does not listen to other arguments and positions except for his own. Additionally he is not willing to discuss his own points as well. When asked about his reasons for pleading guilty, he states that the facts are clear and cannot be questioned. He sticks to this point right until the end. Another aspect is that he does not support other juror even when they argue for him. Here he shows that he does not trust other members of the jury to help him and he does not think he needs their help (at least not in the beginning). Rarely does he agree with stated points, and when he does, he only states this in a short sentence without explaining why and especially without adding any content or arguments to the discussion. The last point to be mentioned here is that he tries to dictate the procedure and the methods of the discussion in an autocratic way. The other jurors are screamed at, bullied and insulted by him in order to pressurize them into his way of working. All this is supported by his body language and his rhetoric. There is an observable development regarding his behavior and communication during the movie. First he seemed structured, calm and self-confident. He talks with a normal voice and his mimic and gesture are serious but not angry. After the first vote, when it turned out that not everyone supports `guilty ´,his behavior changed. He got angrier which is expressed with his face and body language. Especially when a juror changes the vote, he showed humiliating behavior. When that happened, there was always the same, non-verbal reaction observable: He stands up, walks straight to the juror and stands at the jurors back, with his hand on the hips, screaming and shouting at them. This shows that he tries to bring himself in the stronger position and awe the others by looking down at them. He is directly addressing them, trying to make them feel uncomfortable. That particular behavior occurred three times during the movie. His angry and loud voice appeared when he got the feeling that he lost the power over the situation, when jurors changed their vote or the others have better arguments. It is hard for him to keep his countenance when he has weaker arguments and tries to get his self-confidence back in treating the others disrespectfully. That happens with laughing at others ´ arguments or shouting at them. Especially juror #8, as he is the activator of the whole discussion itself, is the target of his disrespect. When juror #8 wanted to make a point, juror #3 played `Tic Tac Toe ´ showing obviously his disinterest. The situation between juror #8 and him heated up first, when juror #3 tries to re-enact the stabbing of the victim. That gesture showed clearly the dispute of the two and the attitude of Juror #3. Now, the communication skills will be discussed. The character used several phrases that support the statements about him made before. At one scene he said to juror #2: `Be quiet for a second. ´ Thisjuror is a very shy and unconfident person. Addressing to him in that way shows that juror #3 has little knowledge of human nature. By discussing the testimony he said once: ` [à ¢Ã¢â€š ¬Ã‚ ¦] and I say it ´s not possible ´. This undermines that he is self-centered and not open for other opinions. His disrespect against juror #8 gets clear when he addressed to him by pointing at him and saying: You over there ´. This impolite communication is present during the whole time. Also when the last man changed his opinion, he asked: What ´s the matter with you? The verbal and non-verbal traits align with the leadership style reviewedin the first part of the analysis. In the following the reasons for the failing of juror #3 will be outlined. Therefore we will check if the different sources of failure fit to this situation. One reason here is a poor character. His inappropriate behavior is based on his character. As mentioned early in the movie, he had a strict father what may influence his traits as an adult. When a leader shows disrespect, little knowledge of human nature and no concern about others he will fail sooner or later. No interest in different opinions, suggestions or the person itself creates less or no followership. The second reason for his failure is the poor communication skills of juror #3. As described before, he shows verbal and non-verbal lacks of an adequate behavior. He doesn ´t listen actively and doesn ´t know how to address at different personalities in a right way. He is not able to communicate effectively what is undermined by his unsuccessful chain of argumentation. A leader, who can ´t convince or influence his followers and can ´t express himself well, will fail. A leader will also fail, when he puts own interest above the interests from those he leads. The consequences are no trust, no confidence and therefore no loyalty. The leader views himself or herself as superior to everyone else, refusing to accept other arguments.Juror #3 doesn ´t build a connection to the others and always insists on his point of view without even listening to several opinions. That is why it was not possible for him to create a relationship to other members of the jury. He is not interested in the needs of a person and is therefore unsuccessful with his leadership style. His arrogance and self-centered behavior made him stand alone at the end of the movie. The final reason why he failed is because he had no clear vision. He voted for `guilty ´, even when all the facts showed the opposite. During the movie it got obvious that he is personally affected regarding the case and that leads to situations where he got unconfident and insecure. Now that the problems are clear we suggest how to avoid ineffective leadership. Ineffective leadership comes along with several improper traits and behaviors. The challenge is to avoid these and adapt the leadership style individually to the organization and the followers. First of all: People are the key. A good knowledge of human nature facilitates to be the leader of a group. That is why an effective leader is able to listen and respond to his followers in a proper and satisfactory way. The ability to treat different characters in the right way is necessary. `One leadership-style fits to all ´ is not helpful. Therefore a good leader can identify how capable and self-confident a person is and react in the adequate way. The way of how a person behaves towards a team and tasks requires different leadership styles.Of course, some followers need an autocratic leadership style. So authority, as showed by juror #3, is not always wrong. The problem was that it was too much and that this kind of leadership doesn ´t fit to all of the jurors. The ability to show authority and do it with respect is the key. This trait will only lead to success when the leader owns the respect of the followers.Hence a leader don ´t have to be `everybody  ´s darling ´but has to know how he should appear in particular situations and to particular kinds of people. An absolute mistake is bullying in an organization. That is what juror #3 showed in some of his behavior patterns and it creates a defense attitude of the others.To avoid immediate failure, a leader should never bully the people in the organization. To succeed in the relationship to the followers a leader should know how to communicate. Influencing people and bringing the vision of the business to them requires good skills and techniques in communication. Therefore to avoid ineffective communication a leader should clearly, effectively and respectfully communicate to followers as well as to the external environment of an organization. Another point, to avoid ineffective leadership, is to learn from own mistakes as well as from mistakes of others. Learning effects are valuable for a leader,adapting to situations and not repeating the same unsuccessful behavior over and over again.Realizing the current behavior is unsuccessful and promptly changing it would have been the right solution for juror #3. Being a good leader is also about actively avoiding wrong decisions not only about making the right ones. Analyzing the past and project it properly to the future will create a good result.Therefore it is also important that the leader knows what business the company is in to avoid misguided efforts and lead his team appropriately. A clear goal is necessary to give the direction and creating trust of the followership. As well as for the leader to come up to expectations regarding performance. An effective leader is also able to keep his emotions and concerns under control. In contrast to that juror #3 showed that he was personally affected and had an emotional breakdown at the end of the movie. That should absolutely be avoided if a leader don ´t want to lose the trust, loyalty and respect of his followers. A good leader can react calmly in turbulent times as well when stress and tensions are present, like it was at end of the movie.

Zigbee Networks And Applications Information Technology Essay

Zigbee Networks And Applications Information Technology Essay ZigBee networking has number of applications, these applications are not just limited to home automation, inventory tracking, and healthcare but its applications are taking into account in daily life routine. Home automation is one of the major application areas for ZigBee wireless networking. The typical data rate for home automation application is 10kbps in a typical resident building. The applications of home automations are further explained. Security Systems A security system might have several sensors, including motion detectors, security cameras and glass-break sensors, these devices are required to communicate with the central security centre by either wires or a wireless network. ZigBee-based security systems are simple to install and easy to upgrade Although ZigBee has a low data rate, it has still the capability to transfer images wirelessly with reasonable quality., ZigBee has been used in a wireless camera system which do record the videos of visitor at a Front door and then transmit these recordings to monitor inside the house. Meter-Reading Systems Utility meters are needed to be read on a regular basis so as to generate utility bills. One simple way to do this task is by reading the meter manually at home premises and then enters values into a database. A ZigBee-based automatic meter-reading (AMR) system has the capability to create wireless mesh networks across residential complexes that makes link meters with utilities corporate offices. By using AMR, it provides the opportunity to remotely monitor the residenceà ¢Ã¢â€š ¬Ã¢â€ž ¢s electric, gas, and water usage. In this way it eliminates the need for a human to visit each residential unit on a monthly basis. Irrigation Systems ZigBee can be used as a part of sensor based irrigation system which is used in efficient water management. Sensors are installed across the landscaping field which can communicate to the irrigation panel. It communicates the soil moisture level at different depth levels to the irrigation panel. The panel controller than tells the watering time based on moisture level, plant type, time of day and the season readings. Light Control Systems One of the classic examples of using ZigBee is Light control in a house or commercial building. In a typical light installation system, it is necessary to install a wire from the light to a switch in order to turn on or off the light. No wired connection between the light and the switch is necessary if the light and switch are equipped with the ZigBee devices. In this way, any switch in the house can be assigned to turn on and off a specific light. A ZigBee-enabled recess light is much expensive compared to a regular recess light, but the installation cost of a ZigBee-enabled light is lower than regular recess light as it requires no extra wiring to a wall switch. Wireless remotes to control the lights is not a new concept in our daily life, By using ZigBee it provides the opportunity to implement this versatile concept on a large scale by ensuring long battery life. Multi zone HVAC Systems The multizone control system have the ability to allow a single heating, ventilation, and air-conditioning (HVAC) unit to have separate temperature zones in a house. Zoning the HVAC system can be very helpful as it saves the energy by controlling the air flow to each room and preventing the cooling or heating to unnecessary areas. ZigBee devices control the motors based on the commands they receive from the main HVAC zone Control panel and temperature sensors. Hotel Guest Room Access ZigBee-based systems can replace the magnetic key card systems which are widely used in hotels in order to access the guest rooms. The traditional room are accessed by plastic cards which have a magnetic strip on their back. The card reader installed on the guest door reads the information that is encoded on to the magnetic strip to allow or deny access to the room. The Installation of this reader to each door requires wiring through the door. A ZigBee- based room access system have a portable ZigBee device that acts as the key and a battery-powered ZigBee device inside the door that locks and unlocks it, the ZigBee based room access system do not require wiring of each door. In this way it reduces the installation cost. Fire Extinguishers Fire extinguishers are required to be checked after every 30 days in order to make sure that all canisters are charged and the filled in pressures are correct. Instead of checking the extinguishers manually, the alternative way is to connect a ZigBee-based monitoring system a sensor is to each fire extinguisher which will monitor its status and it will wirelessly communicate with the coordinator when maintenance is needed. A ZigBee-based monitoring system saves time and labor cost. It also helps to improve fire safety when the fire extinguisher is not working properly by alerting the authority. Remote Control ZigBee have applications that are used in wireless remote controls, game Controllers, a wireless mouse for a personal computer, and many other applications An infrared (IR) conventional remote control communicates with televisions, DVDs, and other entertainment devices through infrared signals. There are limitations of IR remotes. One of the limitation is that IR remotes that provide only one-way communication from the remote to the entertainment device. Also, IR signals do not have the ability to penetrate through the walls and other objects and it therefore require line of sight for its peroration properly. Radio frequency (RF) signals have the ability penetrate through walls and most objects. ZigBee is a suitable replacement technology for IR technology in remote controls as it is low cost and has long battery. ZigBee can be used to create a two way communication between the remote control and the entertainment device. For example, song information or on-screen programming options can be directly fed in to the remote itself, even when the remote control is not in the same room as the entertaining device. Healthcare One of applications of ZigBee in the healthcare industry is to monitor a Patientà ¢Ã¢â€š ¬Ã¢â€ž ¢s vital health information remotely. For example a patient is staying at his home but for him it is important that his physician monitor his blood pressure and heart rate regularly continuously. A ZigBee network has the ability to collect the data from various sensors that are connected to the patient. The 802.15.4 standard uses a 128-bit Advanced Encryption Standard (AES) technology in order secure the data flow between ZigBee devices and other networks. A patient wears a ZigBee device that is interfaced with different sensors, such as a blood pressure sensor, which gathers the information from these sensors on a periodic basis. The received information is transmitted to a ZigBee gateway. A ZigBee gateway provides the interface between ZigBee and other types of networks, such as an Internet Protocol (IP) network. The patientà ¢Ã¢â€š ¬Ã¢â€ž ¢s gathered information is then transmitted via Internet to a personal computer of a physician or nurse that they use to Monitor the patientà ¢Ã¢â€š ¬Ã¢â€ž ¢s health status. This system could help hospitals in order to improve patient care and give some relieve hospital overcrowding by giving them the authority to monitor patients at home.

Mosquito Fest :: Personal Narrative Descriptive Place Essays

Mosquito Fest I felt a small tickle on my arm. It turned into a pinching itch. I looked at my vulnerable white arm to find a small black-striped mosquito harassing my clean flesh for the perfect spot to strike. At the speed of light it was already injecting my skin and by the time I looked, it had conquered my blood. Mosquitoes, mosquitoes, mosquitoes! Aaaahhhh! They can drive anyone crazy. Walking through the hammocks, not even the insect repellent will save you. I just don’t get it. I’m sacrificing my skin by wearing insect repellant with deet (which melts plastic) and these salt water monsters still managed and dared to pinch and penetrate though my skin, sucking my blood out of me. One of my classmates told me a mosquito secret. She said if I pulled my skin, stretching it in opposite ways while a mosquito is biting me, it’s stinger would get trapped in the skin and it would explode. I wondered how on Earth this was possible until she taught me that the mosquito would continue to draw blood as an attempt to get out. I trusted that she was correct because she works with the Everglades and she has done this herself. I was so amazed with this information that I couldn’t wait to burst one of those little nuisances myself. It’s weird because I don’t ever kill insects. I don’t have the heart to. I believe that just like humans they have their own lives and have the right to live. I don’t even kill flies. I guess that is because they don’t bite or physically pester me. Every once in a while I’ll find a lizard roaming in my house. When I find myself in a situation like this, I’ll open the nearest window or door and push or lead it out with a broom. Small lizards I actually catch with my bare hands. Besides, I’m happy they eat flies and lizards. I don’t support or use bug spray (I think it’s completely cruel). So, back to mosquitoes: Going through the Bid Cypress Swamp, Lynette and I were trying to let mosquitoes bite us so we would be able to pop them. We weren’t fortunate though. I for one, couldn’t deal with the fact that I was going to be left with a red bump, not to mention it would really bother me itching like crazy for a couple of days. Mosquito Fest :: Personal Narrative Descriptive Place Essays Mosquito Fest I felt a small tickle on my arm. It turned into a pinching itch. I looked at my vulnerable white arm to find a small black-striped mosquito harassing my clean flesh for the perfect spot to strike. At the speed of light it was already injecting my skin and by the time I looked, it had conquered my blood. Mosquitoes, mosquitoes, mosquitoes! Aaaahhhh! They can drive anyone crazy. Walking through the hammocks, not even the insect repellent will save you. I just don’t get it. I’m sacrificing my skin by wearing insect repellant with deet (which melts plastic) and these salt water monsters still managed and dared to pinch and penetrate though my skin, sucking my blood out of me. One of my classmates told me a mosquito secret. She said if I pulled my skin, stretching it in opposite ways while a mosquito is biting me, it’s stinger would get trapped in the skin and it would explode. I wondered how on Earth this was possible until she taught me that the mosquito would continue to draw blood as an attempt to get out. I trusted that she was correct because she works with the Everglades and she has done this herself. I was so amazed with this information that I couldn’t wait to burst one of those little nuisances myself. It’s weird because I don’t ever kill insects. I don’t have the heart to. I believe that just like humans they have their own lives and have the right to live. I don’t even kill flies. I guess that is because they don’t bite or physically pester me. Every once in a while I’ll find a lizard roaming in my house. When I find myself in a situation like this, I’ll open the nearest window or door and push or lead it out with a broom. Small lizards I actually catch with my bare hands. Besides, I’m happy they eat flies and lizards. I don’t support or use bug spray (I think it’s completely cruel). So, back to mosquitoes: Going through the Bid Cypress Swamp, Lynette and I were trying to let mosquitoes bite us so we would be able to pop them. We weren’t fortunate though. I for one, couldn’t deal with the fact that I was going to be left with a red bump, not to mention it would really bother me itching like crazy for a couple of days.

Abortion in context: What was the fate of an unwanted or orphaned child in the nineteenth century? :: Essays Papers

Abortion in context: What was the fate of an unwanted or orphaned child in the nineteenth century? For as much as has been written about the crime of abortion and infanticide, equally much as been said against forced maternity, marital rape, and woman’s lack of control over her own body, all circumstances resulting in unwanted pregnancy and unwanted children. Such circumstances all stemmed from unique family, social, or health issues, with no one cause resulting in the abandonment of a child. A lack of knowledge about both sanitation and about women’s health resulted in the deaths of mothers during birth. General poverty and migration from farms to city centers made large families more difficult to support financially. Giving up a child because it could not be economically supported by its family was a common occurrence. As abortion became more stigmatized and criminalized, children who were the product of rape or wedlock were also abandoned. Deaths related to the Civil War also dramatically increased the numbers of orphaned children. Within the pages of The Revoluti on, it is asked: â€Å"Women who are in the last stages of consumption, who know that their offspring must be puny, suffering, neglected orphans, are still compelled to submit to maternity, and dying in childbirth, are their husbands ever condemned? Oh, no!† (2) Stemming from models developed in Rome under Marcus Aurelius and Florence’s Innocenti, orphans were first nursed by peasant women, then adopted or apprenticed by the time they were seven or eight years old (Simpson 136). Care of the orphans (and also the sick, the poor, the elderly, and the mentally ill) was first the responsibility of the church, but with increased legislation, the responsibility gradually fell under the state (Simpson 137). Pennsylvania passed such a â€Å"poor law† in 1705, establishing an â€Å"Overseer of the Poor† for each township. Each overseer was responsible for finding funds for children and more commonly, for finding positions of servitude or apprenticeship (7). Such a model of short-term care followed by adoption, apprenticeship, or indentured servitude became the standard for dealing with orphaned children. The development of specific orphanages or child asylums, however, did not come until later in the nineteenth century. Orphaned children were first treated in almshouses, first established in Philadelphia in 1731 (7). Poorhouses, workhouses, and almshouses, all essentially the same institution, housed both adults and children without homes. Residents were seen as nearly free sources of labor, working in sweatshops or nearby mines in the case of several British poorhouses (5).

Society and the Roles We Play/Zimbardo and the Hoax

Psych 333: Social Psychology Society and the Roles We Play/Zimbardo and the Hoax As social human beings we encounter the powerful effects of roles every day. Whether you’re an experienced doctor or a propane truck driver, your roles are much more than just a small piece of a big picture. Our roles are in nature a social element that when used correctly can slightly or completely alter another’s. When used maliciously our roles can not only psychologically damage an individual or a handful of people, but also the masses.Adolf Hitler’s role as a chancellor changed the roles of normal German soldiers to genocidal henchmen which in turn changed the Jews’ roles as a race of beautiful people to what seemed like verminous animals needing extermination. The dynamics of social roles are not always this drastic but when they are, our life as we know it changes. To see how similar a real life tragedy and a staged study are with damaging effects of roles, it is import ant to analyze the Stanford Prison Experiment and a very horrible real life tragedy comparatively.In order to explain such a socially fascinating phenomenon as the Stanford Prison Experiment led by Zimbardo, we must first see what social psychological factors were at play. First it is important to know that all participants in this experiment including the prisoners, the guards, and the confederates gave their full consent to participate. This is important because the main method of this experiment would make the participants take on different roles. This method helped determine the purpose of this experiment which is whether or not the participants’ would perceive their roles as pretending or reality.This perception was shown through behavior from both prisoners and guards as a self-fulfilling prophecy. This is evident because the reciprocal behaviors expressed by the prisoner participants and the guard participants would amplify each other’s behavior. An increase of aggression causes an increase in submissiveness which in turn amplifies aggression and continuous into a vicious cycle. The experiment has been argued to have been unsuccessful; however the experiment contained a high amount of experimental realism. Although the experiment was unethical it yielded fascinating results from both the prisoners and the guards.First I believe it is important to analyze the behavior exhibited by the participants in the experiment. Prior to the experiment, the participants were in fact informed about the nature of the experiment and the moment they were arrested they would assume their roles as prisoners. A majority of the experiment was done inside of the prison. It was during this time that the prisoners displayed many social psychological behaviors that result from playing a submissive role. The progression of the experiment’s time also caused some of these interesting behaviors to amplify.It is important to understand that the underlining qualit y that the prisoners in this study exhibited was learned helplessness. This is predominantly evident when the prisoners’ acts of rebellion toward the guards diminish. This leaved the prisoners with an overall sense of helplessness. They were more likely to submit to the hostile and aggressive demands of the guards. Although some of the demands of the guards such as doing countless numbers of pushups would seem unethical in a real prison, even a participant assuming a false role as a prisoner follows such preposterous demands.What is more perplexing about this study was the fact that these participants in fact knew that they were not really guilty of any crime but as the experiment progressed and the guards became more aggressive the inmates displayed very passive behavior because they knew that their behaviors could not change the current predicament that they were in. Another remarkable concept that helped reinforce the participants’ roles as prisoners was the Saying- Becomes-Believing Effect. In one instance the participant known as prisoner 8612 would either rebel or would show what would be seen as undesirable behaviors in the guards’ eyes.After doing this the guards would have the inmates punished and also have them chant â€Å"Prisoner 8612 was bad†. The prisoners seemed to show a certain degree of animosity towards prisoner 8612 and eventually led to his outright emotional breakdown and made him to truly believe that he was a bad prisoner. This again shows the strength of learned helplessness in social cognition. Prisoner 8612 believed he was a bad prisoner; therefore he became a bad prisoner. The only thing more fascinating than the growing submission of the prisoners had to be the increasing aggression by the prisoners.It is a confounding concept that in most prisons, the idea that prison guards act more harshly towards an inmate because they are in fact psychologically feeding off of the prisoners’ submissiveness. Th e guards in the study were introduced exactly as the prisoners were to the study’s nature just as different roles. Their roles would begin the moment they arrested the prisoners. Upon arriving to the prison however, the guards would assume an entirely different role than a prisoner.These soon-to-be tyrants would use one of the most powerful social psychological weapons in their armory: deception. The Stanford Prison guards used deception in a number of ways during this study. In the experiment they introduced the privilege cell and the penalty box to the prisoners. The privilege cell was a much nicer cell than the ones given to the rest of the prisoners. When the guards put certain prisoners in the privilege cell this deceived the other prisoners into believing that this prisoner was good which in turn caused the prisoners to be more behaved.The same deception was used in punishing the prisoner with the penalty box which was a small broom closet sized room which would be used to keep the prisoners when they were bad. Another method of deception that the guards inflicted was towards the family of the prisoners. The guards forced the prisoners to write to their families constantly that everything was going well in the prison. Along with these letters the prisoners would also force the prisoners to identify themselves as their assigned numbers rather than their actual names.I confounding factor that also helped in the amplifying aggression of the guards towards the prisoners was their act of justification. It is rather odd that regular people who for the most part did not assume any kind of authoritative role use authority in such a severe way. When questioning the severity of their actions towards the prisoners justified their actions by telling themselves that they are being told to be this way towards the prisoners and also that the prisoners’ behaviors caused them to bring the consequences upon themselves. The experiment seemed so real that it c ould not even complete the full desired duration.This experiment will always be remembered as one of the biggest contributions to social psychology because it showed the powerful effects of submissiveness vs. authority. It was because of this experiment also question and reevaluate what is and isn’t ethical in social psychology experiments. It also shows us how people whether they are in positions of authority or not can manipulate this powerful psychological element against others causing not only psychological and emotional ramifications, but also legal ones as well. This was seen in one of the cruelest hoaxes ever played.The hoax that I am describing was one that went from what seemed to be a mean prank call, to dozens of legal repercussions and countless victims of emotional and psychological distress. These calls were made by David R. Stewart. Although Stewart seemed like a man of average intelligence, it wouldn’t be unfair to consider him to be a social psycholog ical genius. Stewart’s calls as a person in a position of authority not only manipulated his victims but also tormented them with a number of social psychological weapons but also used the psychological factors of his victims against themselves.He was sometimes able to take two innocent people and make one a victim of sexual assault and the other a victim in a single phone call. In order to analyze how Stewart was able to succeed at this it is important to see what psychological factors were in play both in the mind of Stewart and his victims. First, Stewart assumed a role of authority as a police officer, corporate employee, or federal officer. This role helped Stewart claim legitimacy to his victims. Although this would seem like enough to control his victims he also used a factor that was possessed not by him but by his victims.Stewart attacked those who worked in the food industry. This may seem odd but it is fact a very intelligent group of people to attack because peopl e in the food industry are trained to be more obedient than others traditionally would. Society’s schema of the food industry portrays it in such a fashion that the number one priority of the industry’s employees is customer satisfaction. In order to achieve customer satisfaction the employees must obey the customer’s wishes. When the employee is on this type of a mindset it isn’t unfair to say that their vulnerability to authority would also heighten.The heightened obedience to authority also arises from another social schema of law enforcement. We tend to live in the illusion that because law enforcement has a higher authority than civilians do, we must do everything they tell us to. This schema is also the reason police often get a confession or information leading to a confession from people because although individuals have the right to remain silent, police use authority to trick them into confessing. The perplexing aspect of this event is not just the acts themselves that were performed, but the fact that the acts grew more and more sexually perverse.Although the act of the hoax itself was perplexing, it is even more fascinating on how the public criticized the whole phenomenon. This alone had so many interesting psychological happenings. Even news broadcasters like Fox-TV called the â€Å"victims† of this hoax were â€Å"colossally stupid†. Another made a statement quoting â€Å"They had the critical ability to decide whether to carry out their orders†. Statements like these show both a hindsight bias and a self-serving bias. People claim that they would never perform perverse and lewd acts on another because an authoritative figure told them to do so.The self-serving bias is the fact that they believe they would personally behave more favorably and the hindsight bias is the fact they claim they would have behaved differently after they heard of the incident. Although people harshly criticized the victim s Stewart did in fact con two thirds of the people he called. This proves an interesting argument because people who read this story will most likely claim that they will never behave in such the fashion the victims did, but because of these social biases it is impossible to know if one would truly fall for a hoax like that.Many look at Zimbardo’s and Milgram’s studies and see the obvious social psychological connection between both. What is interesting is how this real world hoax and the two above studies have very predominant similarities. Both instances involve two different groups of normal people assuming a role and watch how their roles completely change their lives. In both situations people who would never normally behave to the roles they were given behave exactly to their roles. In both situations the submissiveness of one person amplifies the aggression and authority of another.In both situations the victims’ roles caused long term psychological and e motional distress. It shows us a society full of schemas that is naturally obedient in following orders whether we believe them to be right or wrong. So in essence these incidents are very relevant to each other and also to social psychology as a field. It is relevant to how we think, how we behave, and how we interact with others. The average person would say that Zimbardo’s study was obviously unethical. This is true because it is unethical.The American Psychological Association provides the Institutional Review Boards to keep experiments ethical and protect the participants in this study. The fact that participants in the study underwent emotional distress proves that the study was unethical. In hindsight, if Stewart’s hoax was indeed replicated it would be terribly unethical to say the least. It is because Zimbardo’s study being so similar to the hoax that roles become psychological damaging. In Zimbardo’s experiment, the participants felt the effects of a six day role long after the study.In Stewart’s hoax, just a few minutes or hours changed some of the victims involved for the rest of their lives. Although it is fair to challenge ourselves as psychologist, experiments with the psychological severity of the Stanford prison experiment are not needed because we know the social psychological implications of role playing. This analysis fits very well with the social psychological perspective. Roles, schemas, and biases show the dynamic of the human’s psychological potential.You do not have to be a PhD psychologist to manipulate more than sixty average people to perform sexual or lewd acts on other innocent people. It also does not take a PhD psychologist to give average people a role that is unordinary to them and watch them change as a person. What seems like simple terms in social psychology can be used as powerful and manipulative weapons in psychological warfare. These concepts also help realize the importance of the roles that we play every day and how they can change the social world as we know it.

How Male and Female Students communicate Essay

In the feature article â€Å"How Male and Female Students Use Language Differently† the author Deborah Tannen, explains how men and women communicate differently in the classroom and reveals how she thinks classrooms everywhere can become a more conducive learning environment for all types of people regardless of gender. Tannen firstly points out the research conducted by Janet Lever, Marjorie Harness Goodwin and Donna Eder and how they’ve discovered that girls and boys do in fact learn to use language differently. For example, girls will use language to share secrets and talk with her friends. Girls form bonds with the ones they talk most with and that is how they form their friendships. On the other hand, boys tend to play in large groups and form a hierarchy where they are expected to use language in order to show strength and challenge each other. Tannen then compares this research to the classroom where it can be easier for boys to speak in front of a large audienc e than for girls because this is how boys were taught to communicate. With this knowledge, the author then decides to use her own classroom for research and breaks up her classroom at Georgetown University into small groups based on their gender and social aptitude. She discovered that when her students were able break apart from the larger arena of the classroom and instead share their ideas with small groups that they were more willing to participate in the discussion and felt better with the way they were communicating. Tannen leaves us by explaining that while yes, treating everyone as equals is great but does that mean that we should be treating everyone the same? If we are fundamentally different than shouldn’t we be taking that into consideration when trying to serve a diverse set of students.