An Introduction To Network Topology

An Introduction To Network Topology In the context of a communication network, the term topology refers to that way in which the end points, or stations, attached to the network are interconnected or it is the arrangements of systems in a computer network. It can be either physical or logical. The physical topology refers that, a way in which a network is laid out physically and it will include the devices, installation and location. Logical topology refers that how a data transfers in a network as opposed to its design. The network topology can be categorized into bus, ring, star, tree and mesh. Hybrid networks (They are the complex networks, which can be built of two or more topologies). Bus Topology A Bus topology is characterized by the use of a multi point medium. A long and single cable acts as a backbone to connect all the devices in a network. In a bus topology, all computers or stations attach through the appropriate hardware interfacing known as a tap, directly to a bus network. Full duplex operation between the station and tap allows data to transmit onto the bus and received from the bus. A transmission from any station propagates the length of the medium in both directions and can be received by all other stations. At each end of the bus is a terminator, which absorbs any signal, removing it from the bus. Nodes are connected to the bus cable by drop lines and taps. A drop line is a connection running between the device and the main cable. A tap is a connector that either splices into the main cable or punctures the sheathing of a cable to create a contact with the metallic core. A bus network work best with a limited number of computers. Advantages Bus topology can install very easily on a network. Cabling will be less compare to other topologies because of the main backbone cable laid efficiently in the network path. Bus topology suited for a small network. If one computer fails in the network, the other computers are not affected they will continue to work. It is also less expensive than star topology. Disadvantages The cable length will limited and there by limits the number of stations. If the backbone cable fails, the entire network will goes down. It is very difficult to trouble shoot. Maintenance cost is very high in a long run. Terminators are required for both the ends of the cable. Ring topology The ring topology the network consists of dedicated point to point connection and a set of repeaters in a closed loop. A signal is passed along the ring in one direction, from device to device, until it reaches its destination. It may be clock wise or anti clock wise. When a device receives a signal intend for another device, its repeater generates the bits and passes them along. As with the bus and tree, data are transmitted in frames. As a frame circulates past all the other stations, the destination station recognize its address and copies the frame into a local buffer as it goes by. The frame continues to circulate until it returns to the source station, where it is removed. These topologies are used in school campuses and some office buildings. tifsTemp 13.a.tif Figure (2) Bus topology Advantages It performs better than star topology under heavy work load For managing the connection between the computers, there is no need for the network server. It is cheaper than star topology because of less wiring. By adding the token ring in the network, can create large network. Very order network because all the devices has a access to the token ring and opportunity to transmit. Disadvantages A break in the ring (such as a disabled station) can disable the entire network. It is much slower than an Ethernet network with under normal load. Any moves, changes and adds of the devices can affect the network. Network connection devices like (Network adapter cards and MAU) are much more expense than Ethernet cards. Star Topology In a star topology, each station is directly connected to a common node called hub. Unlike a mesh technology, the devices are not directly linked to one another. A star topology does not allow direct traffic between devices. The controller act as an exchange, like if one device wants to send to another, it sends the data to the controller, which then relays the data to the connected device. In a star, each device needs only one link and one I/O port to connect it to any number of others. The star topology is used in local area networks (LAN) and sometimes high speed LAN often uses a star topology with central hub. Advantages If one link fails in the star topology, only that link is affected. All other links remain active. It is easy to identify the fault and fault isolation. Easy to expand the network in the star topology. No disruptions to the network when connecting or removing devices. It is very easy to manage because of its simplicity in the function. Disadvantages In a star topology, if the hub goes down, the entire network will fails. It requires more cable length compared to the linear bus topology. It is much more expensive than bus topology, because of the cost of the hubs. Tree Topology A tree topology is the generalization of the bus topology. It integrates the multiple star topologies together on to a bus. The transmission medium is a branching cable with no closed loops. The tree layout begins at a point known as the head end. The branches in turn may have additional branches to allow quite complex layouts. A transmission from any station propagates throughout the medium and can be received by all other stations. This topology will allow for the expansion of an existing network. Advantages Tree topology is well supported by the hardware and software vendors. Point to point wiring for each and every segments of the network. It is the best topology for the branched networks. Disadvantages It is more expensive because more hubs are required to install the network. Tree topology is entirely depends upon the backbone line, if it fails then the entire network would fail. It is very difficult to configure and wire than other network topologies. In a tree topology, the length of network depends on the type of cable being used. Mesh Topology In a mesh topology, every device has a dedicated point-to-point link to every other device. The term dedicated means that the link carries traffic only between the two devices it connects. To find the number of physical links in a fully connected mesh network with n nodes, we first consider that each node must be connected to other node. Node 1 must be connected to n-1nodes, node 2 must be connected to n-1nodes, and finally node n must be connected n-1 nodes. However, if each physical link allows communication in both directions, we can divide the number of links by 2.In other words we can say that in a mesh topology, we need n (n-1)/2. tifsTmp9.tif Figure (5 Mesh topology Suppose if we are connecting 15 nodes in a mesh topology, then the number of cables required; DA = n (n-1)/2 DA = Number of cables = 15 (15 1)/2 n = Node = 15*14/2 = 15*7 = 105 Therefore, the total number of cables required for connecting 15 nodes = 105. Advantages There is no traffic problem because of the dedicated link in the mesh network. Mesh topology is robust. If one link becomes unusable. It does not incapacitate the entire system. Point-to-point links make full identification and fault isolation easy. Security or privacy for data travels along the dedicated line. Network can be expanded without any disruptions to the users. Disadvantages Installation and reconnection are difficult. Large amount of cabling and the number of I/O ports required Sheer bulk of the wiring can be greater than the available space can accommodate. The hardware required to connect each link can be prohibitively expensive. Hybrid Topology A network can be hybrid, which uses two or more network topologies together in a network. For example, we can have a main star topology with each branch connecting several stations in a bus topology. The OSI Model The Open System Inter connection (OSI) reference model was developed by the International Organization for Standardization (ISO)2 as a model for a computer protocol architecture and as a frame work for developing protocol standards. The purpose of the OSI model is show how to facilitate communication between different systems without requiring changes to the logic of the underlying hardware and software. The OSI model is not a protocol; it is a model for understanding a network architecture that is flexible, robust and interoperable. The OSI model is a layered frame work for the design of network systems that allows communication between all types of computer systems. It consists of seven separate but related layers, each of which defines a part of the process moving information across a network. The seven layers of the OSI reference model can be divided into two categories: upper layers and lower layers. Upper Layers of the OSI Models are; Application layer Presentation layer Session layer The upper layers of the OSI model designate the application issues, presentation session stages and generally are implemented only in software. The highest layer, (the application layer) is close to the end user. These upper layers are act as an interface between the user and the computer. The term upper layer is sometimes used to refer to any layer above another layer in the OSI model. Examples of upper layer technologies in the OSI model are SNMP, FTP, and WWW etc. Lower Layers of the OSI Model Transport layer Network layer Data link layer Physical layer The lower layers of the OSI model provide network specific functions like data transport issues (flow control, addressing and routing). The lower layers of the OSI model (the physical layer and the data link layer) are implemented in hardware and software also. Examples of lower layer technologies in the OSI model are TCP, UDP, IP, IPX etc. Application layer The application layer enables the user, whether human or software, to access the network. It provides user interfaces and support for services such as electronic mail, remote file access and transfer, shared database management, and other types of distributed information services. The application layer provides specific services like network virtual terminal, file transfer, access and management, mail services and directory services. Network virtual terminal: A network virtual terminal is a software version of physical terminal, and it allows a user to log on to a remote host. File transfer, access and management: This application allows a user to access files in a remote host (to make changes, read data), to retrieve files from a remote computer for use in the local computer and to manage or control files in a remote computer locally. Mail services: The application provides the basis for e-mail forwarding and storage. Directory services: This application provides distributed database source and access for global information about various objects and services. Presentation layer The presentation layer is concerned with the syntax and semantics of the information exchanged between two systems. The presentation layer is responsible for the translation, compression and encryption. Messages are sending between the layers. Translation: The process in two systems are usually exchanging in the form of character strings, numbers, and so on. The information is changed into bit streams before being transmitted. The presentation layer at the sender changes the information from its sender dependent format into a common format. On the receiving machine, the presentation layer changes the common format into its receiver-dependent format. Encryption: Encryption means that the sender transforms the original information to another form and sends the resulting message out over the network. Decryption reverses the original process to transform message back to its original form. Compression: Data compression reduces the number of bits contained in the information. It becomes particularly important in the transmission of multimedia such as text, audio and video. Session layer The session layer is the network dialog controller. It establishes, maintains and synchronizes the interaction among communicating systems. These layers have specific responsibilities include the following; Dialog control: The session layer allows two systems to enter into a dialog. It allows the communication between twp processes to take place in either half duplex (one way at a time) or full duplex (two ways at a time) mode. Synchronization: The session layer allows a process to add check points, or synchronization points, to a stream of data. Examples for session layers are MPEG, JPEG, MIDI, NCP etc. Transport layer The transport layer is responsible for process to process delivery of the entire message. The transport layer is responsible for the delivery of a message from one process to another. A process is an application program running on a host. The transport layer ensures that the whole message arrives intact and in order, overseeing both error control and flow control at the source-to-destination level. It also has some specific responsibilities mentioned below; Service-point addressing: The transport layer includes a type of address called a service-point address (or port address). The network layer gets each packet to the correct computer,; the transport layer gets the entire message to the correct process on that computer. Segmentation and reassembly: A message is divided into transmittable segments, with each segment containing a sequence number. These numbers enable the transport layers to reassemble the message correctly upon arriving at the destination and to identify and replace packets that were lost in transmission. Connection control: The transport layer can be either connectionless or connection oriented. A connectionless transport layer treats each segment as an independent packet and delivers it to the transport layer at the destination machine. If a connection oriented transport layer make a connection with the transport layer at the destination machine first before delivering the packets. After all the data are transferred the connection is terminated. Flow control: The transport layer is responsible for the flow control. However, flow control at this layer is performed end to end rather than across a single link. Error control: Transport layer is also responsible for the error control. Error control at this layer is performed process-to-process rather than across a single link. The sending transport layer makes sure that the entire message arrives at the receiving transport layer without error. These layers using the TCP/IP and UDP protocols. Network layer The network layer is responsible for the source to destination delivery of a packet, possibly across multiple networks (links). This layer ensures that each packet gets from its point of origin to its final destination. Network layers also have other responsibilities include the following; Logical addressing: If a packet passes the network boundary, it needs another addressing system to help distinguish the source and destination systems. The network layer adds a header to the packet coming from the upper layer that, among other things, includes the logical addresses of the sender and receiver. Routing: When independent networks are connected to create internetworks or a large network, the connecting devices route or switch the packets to their final destination. Data link layer The data link transforms the physical layer, a raw transmission facility, to a reliable link. It makes the physical layer appear error-free to the upper layer. It also has other responsibilities include the following; Framing: The data link layer divides the stream of bits received from the network layer into manageable data units called frames. Physical addressing: The data link layer adds a header to the frame to define the sender and/or receive of the frame. If the frame is intend for a system outside the senders network, the receiver address is the address of the device that connects the network to the next one. Flow control: If the rate at which the data are absorbed by receiver is less than the rate at which data are produced in the sender, the data link layer impose a flow control mechanism to avoid overwhelming the receiver. Error control: The data link layer adds reliability to the physical layer by adding mechanisms to detect and retransmit damaged or lost frames. It also uses a mechanism to recognize duplicate frames. Error control is normally achieved through a trailer added to the end of the frame. Access control: When two or more devices are connected to the same link, data link layer protocols are necessary to determine which device has control over the link at any given time. Data link contains two sub layers; LLC (Logical Link Control) and MAC (Medium Access Control).LLC is the upper sub layer, which maintains and establishes the communication links to the device. And it also responsible for the frame error control and addressing.MAC is the lower sub layer of the data link layer. It controls how the devices sharing the media channel. Physical layer The physical layer coordinates the functions required to carry a bit stream over a physical medium. It deals with the mechanical and electrical specifications of the interface and transmission medium. It also defines the procedures and functions that physical devices and interfaces have to perform for transmission to occur. The physical layer is also concerned with the following: Physical characteristics of interface and medium: Physical layer defines the characteristics of the interface between the devices and the transmission medium. It also defines the type of transmission medium. Representation of bits: This layer data consists of a stream of bits with no interpretation. To be transmitted, bits must be encoded into signals electrical or optical. The physical layer defines the type of encoding. Data rate: The transmission rate the number of bits sent each second- is also defined by physical layer. In other words physical layer defines the duration of a bit, which how long it lasts. Synchronization of bits: The sender and receiver not only must use the same bit rate but also must be synchronized at the bit level. Line configuration: The physical layer is concerned with the connection of devices to the media. In a point-to-point configuration, two devices are connected through a dedicated link. In a multipoint configuration a link is shared among several devices. Physical topology: The physical topology defines how devices are connected to make a network. Devices can be connected by using a mesh topology, a star topology, a ring topology, a bus topology, or a hybrid topology. Transmission mode: The physical layer also defines the direction of transmission between two devices: simplex, half duplex, or full duplex.

Drug Screening in Government Assistance Programs

Drug Screening in Government Assistance Programs The United States Federal Government Should Initiate Drug Screening For Citizens Who Seek Government Assistance. Negative Strategy # 1 As Pollack, Danziger, Jayakody Seefeldt (2002) affirm, initiating involuntary dug screening for all citizens seeking government assistance is definitely costly. The purchase of modern drug screening equipment in numbers that will be able to screen all people who apply for welfare programs, especially with the large population of America, would certainly be an expensive exercise. In addition, like any other machine, the drug screen equipment will require regular servicing and maintenance, which require more resources at close intervals. It is equally undoubted that in order for the screening programs to be successful, medical professionals and technological professionals will need to take part. This implies that a competent staff that comprises of specialists in all relevant sectors of operation and in appropriate numbers will mandatorily be employed to make the program a success. Apparently, the cost of purchasing the drug screening equipment, maintaining them, and pay for all the i nvolved expenses including the human resources is most likely to exceed the amount of money that the federal government would save on implementing drug screening policy to persons seeking government’s assistance (Pollack et al., 2002). Similar to Pollack et al. (2002), Carey (1998) emphasizes that the implementation of compulsory drug testing policies to citizens who seek for government’s assistance is unnecessary, unjustifiable, and the highest level of misappropriation of taxpayers’ money.The implementation of laws that support mandatory drug screening for people applying for government assistance is unnecessary and misappropriation of taxpayers’ money Therefore, it unnecessary and unjustifiable that the federal government engages in a more expensive program with intentions to save taxpayers’ money, as the implementation of the drug screening program will cost a lot more of the taxpayers’ money than the welfare programs as they currently are (before the implementation of the policy). Fielding, Long, Imam, Tye Ogawa (2002) further states that initiating drug screen for all citizens seeking government’s assistance is likely to have very little (negligible) or even no effect on the prevalence of drug abuse in the country. According to Fielding et al. (2002), a majority of people who are financially vulnerable in the United States are not drug addicts. The cost of drugs in the country is relatively expensive for many people belonging to poor population, especially with the high tax rates that the government has implemented on drugs over subsequent years. They also notes that it is much more reasonable for the Federal government to determine the prevalence drug use in the country by assessing people based in their ages rather than income, as a majority of drug users fall within the productive ages of between 16 and 40 years (Fielding et al., 2002). Hence, the implementation of drug screening policy, which only demands for mandatory drug testing among the econo mically vulnerable, is likely play an insignificant role in controlling drug use in the country. Referring to Guthrie (1990), the implementation of the mandatory drug screening initiative for persons participating in welfare programs is unconstitutional and a violation of people rights to privacy and freedom to make personal choices. With the drug screening policy requiring that all people needing government assistance must be tested for all sorts of drugs including alcohol and tobacco before they can be eligible for the assistance, it is clear that the implementation of the policy will breach the law, especially with the fact that alcohol and tobacco are legal drugs in the United States. Provided one has attained the required age, he or she has the right use drugs that are legal for whichever reasons. Thus, it is unconstitutional and discriminative for the Federal government to deny law-abiding citizens the right to use legal drugs just because they are financially vulnerable and requires assistance from government-sponsored welfare programs. Negative strategy # 1 Rather than implementing mandatory drug screening policy to all citizens who apply for welfare programs, the government should support awareness creation programs that will discourage all members of the society to desist from drug abuse (DiNardo, 1994). The government should support school-based programs that aim at educating students in all levels of education ranging from elementary, secondary, middle-level colleges, to universities on the dangers of drug use. The government should equally use the mainstream media to run campaigns that discourage drug use while at the same time limit the campaigns on the same media that promote drug use. The federal government should equally compel all drug manufacturers to include cautionary or warning messages on the packages of their products to educate consumers on the negative effects of the drugs they are using. Through the creation of consciousness on the need to shun drug use, it is clear that many people will develop an internal motivation to stop drug abuse rather than being compelled to stop using drugs because one is financially vulnerable. As Pavetti, Olson, Nightingale, Duke Isaacs (1997) points out, drug addiction is like a chronic disease and one hardly, whether willingly or unwillingly, stop the practice overnight. Stopping drug use is a gradual process, and drug addicts need to be taken through comprehensive behavior change programs that may take up to one or two years. Based on that, the Federal government should construct more rehabilitation facilities and equip them with the necessary human resources and machinery with which to support drug addicts to stop unproductive drug use; instead of implementing the dictatorial and illegal drug testing policy on applicants of government’s assistance. The access to the rehabilitation programs should equally be enhanced, particularly by making them affordable to all people including the economically vulnerable. Using the behavior change programs where professionals take drug addicts through gradual steps in on how to stop the addiction, it is evident that the gover nment is bound to get better results on drug control than implementing the drug policy, which will require people to forcefully, stop drug abuse in order to be eligible for welfare programs (Pavetti et al., 1997). An alternative strategy to implementing the drug screen policy on citizens needing government’s assistance is the formulation and then implementation of strict legislations that govern drug use in the country. As Hora, Schma Rosenthal (1998) support, the use of the legal infrastructure where all people who violate drug laws are punished promptly by the court of law is likely to give better results in the fight against drug use. The legislations should provide a platform on which people who take illicit drugs, those who sell drugs to minors, and those who use drugs inappropriately are surely prosecuted and punished by huge fines and even imprisonment sentences. The federal government should improve surveillance on drug abusers and work with the judicial systems to ensure that all violators of drug laws are held accountable for their actions. Through that, people will shun from the illegal use of drugs, and that will help in controlling the prevalence of drug abuse in the socie ty. References Pollack, H. A., Danziger, S., Jayakody, R., Seefeldt, K. S. (2002). Drug testing welfare recipients—false positives, false negatives, unanticipated opportunities.Womens Health Issues,12(1), 23-31. Fielding, J. E., Long, A. M., Imam, I. J., Tye, G., Ogawa, P. L. (2002). The drug court programs of Los Angeles County: the initial results.A Journal of the Substance Abuse Treatment,23(3), 217-224. Guthrie, P. M. (1990). The Drug Test and Welfare: Taking of the Drug War into Unconstitutional Limits.Ind. LJ,66, 579. Carey, C. A. (1998). Crafting of a challenge to the practice of the drug testing welfare participants: the federal welfare reform, and state response as one of the most recent chapters in the war against drugs.Buff. L. Rev.,46, 281. DiNardo, J. (1994). The critical review of estimates of the specific costs of alcohol and drug usage. InDrug testing in the workplace(pp. 57-76). Springer US. Pavetti, L., Olson, Nightingale, D., Duke, A. E., Isaacs, J. (1997). Welfare-to-Work Options for Families Facing Personal and Family Challenges: Rationale and Program Strategies. Hora, P. F., Schma, W. G., Rosenthal, J. T. (1998). The therapeutic jurisprudence, as well as the drug treatment and court movement: A Revolutionizing of the response system of the criminal justice to drug abuse, and crime in the U.S..Notre Dame L. Rev.,74, 439.

The Fundamental Caring Skill of Blood Pressure recording Using an Appro

The fundamental caring skill that was chosen to demonstrate knowledge and understanding within a reflective framework was recording blood pressure. Blood pressure was chosen because it is a critical physiological function and a fundamental indicator of well being (Fullbrook 1993). It is an important and vital observation, in that it allows early therapeutic intervention should a patient’s status change (Fullbrook 1993). This essay will also demonstrate an understanding of best practice for the theory of blood pressure measurement of the patient. The factors which can influence different results in the measuring of blood pressure. In a model of reflection to aid the reflective process Gibbs (1998) was chosen. Before placement started we were given books for Nursing Midwifery Council (NMC 2004) code of professional conduct, and the NMC (2004) guide for students of nursing and midwifery. This gave me the guidelines and knowledge for my accountability and confidentiality. Marieb (1998) suggests that Blood Pressure may be defined as the force exerted by the blood against the walls of the arteries in which it is contained. Differences in blood pressure between different areas of the circulation provide the driving force that keeps the blood moving through the body. Blood pressure is measured for one of two reasons, firstly to determine the patients blood pressure as a baseline prior to admission and secondly to monitor fluctuations within the blood pressure. Blood flow is defined as a volume of blood flowing from the heart through a vessel at any given time. Blood flow is equivalent to cardiac output. Resistance to the cardiac output is the opposit... ...the procedure for taking blood pressure helps to understand the theory behind the practice. To conclude my essay the skill of recording blood pressure is a vital one for the nurse, as we can not always rely on having electronic equipment to hand. I also gained that if different circumstances can have an effect on the pressure reading. I feel I have gained a learning skill I was quite worried about this skill but practice makes easier. The more blood pressure recordings I took me soon realised that no two patients were the same. I also learned that different factors can affect blood pressure, from the patient rushing in late for his appointment which can lead to elevated blood pressure. It has also given me a lot of confidence in myself and confidence with the patients I care for.

Augustines God Vs. Epictetus God :: essays research papers

At first glance, I was immediatly inclined to argue in epictetus' favor, because it pains me to argue that Christianity is good for anybody. In the following paragraphs, i will contrast the God of Epictetus, and the God of Augustine, and in the end, my stand will be clear. Epictetus and Augustine both identify God on basic level. Epictetus says, "Where the essence of God is, there too is the essence of good. What is the essence of God?......Right Reason? Certainly. Here then, without more ado, seek the essence of good." He says strive for goodness, live in conformity with it, and you will find God. God is the vital force that creates all things and the cosmic intellegence that governs it from within. Augustine says: "Where I found truth, there i found my God, who is truth itself." He says strive for truth and understanding...In loving God, we love truth. Persons can come to know truth though inner experience and conviction, he holds that you can't obtain true knowledge without faith. you must have faith in God, who is the essence of all truth. Both philosophers address man's powerlessness in the face of God. Epictetus asserted that humans are basically limited and irrational beings, but that the universe, ruled by God through pure reason, is perfect. Because human beings can neither know nor control their destiny, they must cease striving for the attainment of worldly ends and pleasures and instead calmly accept the fact of their own powerlessness before fate. The only thing in a person's power is their response to events or outlook, namely, their morality. Augustine believed faith preceded reason. He believed people are good, but not perfect. But in Augustinean theology, each person is predestined to either heaven, or to fry like bacon, and there's nothing you can do about it. Salvation is a "free gift" with purchase, but only to every 7,000th caller. This is where i would think morality means squat. If you know God decided when you were born whether or not you were going to heaven, nothing you do makes any difference. You can step all over everbody, and run with scissors and it doesn't matter. If you go to hell, you were going there anyway. If you're going to heaven, you've got a few good stories to tell when you get there. On top of all this, Augustine says that no human mind can penetrate the mystery of of God's wisdom.

Honesty :: essays research papers

Essay on Honesty   Ã‚  Ã‚  Ã‚  Ã‚  You pull up to the second window at the McDonalds’s drive-through to pick up the shake you just ordered and paid for, and the person working there hands you a huge bag of food while asking you if this is what you ordered. Do you A: Answer â€Å"Yes† and take the food or B: Answer â€Å"No† and tell him/her that you only paid for a shake? Yes this really did happen to me. What did I do? Believe it or not, I did the honest thing and gave the food back. But the real question is what would a majority of American’s youth do in a similar situation. There are two potentially dishonest acts in this situation, lying and stealing. In my opinion most high school kids are not above lying and/or stealing. The reason this is true is simply that many of today’s parents are not above lying and/or stealing. So after observing people that hold a high place of respect do things unmoral like this, their conscience says to itself, â€Å"Okay, lying and/or stealing is not really that bad, and is acceptable to my parents.† A majority of Americans youth today are morally confused, due to the un-honorable actions of their parents.   Ã‚  Ã‚  Ã‚  Ã‚  1984, by George Orwell, shows an example of un-honorable actions of parents, rubbing off on their children. About 99% of the population in this book, were uncaring robots. They would turn their best friend into the â€Å"thought police† at the drop of a hat. They don’t think for themselves, and therefore are robots. The children of 1984, were even worse because they would turn their own parents into the â€Å"thought police†, with no sense of shame, and they actually felt proud about their actions. This is a perfect example of the unmoral actions of the parents rubbing off on their children. This could be the fate of our country if we don’t take parenting more seriously. If this pattern continues on it’s current course, we will have a society with no boundaries to govern life.   Ã‚  Ã‚  Ã‚  Ã‚  What can we do to remedy, you ask? Well we can start by thinking about what we do before we do it and putting ourselves into the other person’s shoes. How would you feel if you are working at McDonalds and you make this huge bag of food and give it to the wrong car. Then the next car pulls up waiting for its food and you realize what happened, so you explain it to the person and rush to make some more food.

Mask Poor Communication

Assignment One: Miscommunication April Sherrod COM 200 Interpersonal Communication Terrance Frazier May 21, 2012 I agree with the article provided â€Å"Close Relationships Sometimes Mask Poor Communication† because I have had plenty of encounters with my loved ones where I was meaning one thing and they were interpreting what I said a completely different way and thinking I meant something totally different from what I actually meant. Have you ever had a miscommunication with someone close to you simply because you assumed that they understood you?What happened? When it comes to having miscommunication with someone, my fiance and I should receive an â€Å"A† all the time. The miscommunication we have can be as simple as me telling him to go to the store and get me a soda and be meaning for him to get a Dr. Pepper and he will come back with a coke. However we have had more serious altercations over miscommunication than a run to the store. The most recent altercation we have had over miscommunication was over whether or not to accept a car my parents were trying to give us as a gift.When telling him of this car, I had told him that there was still a little over $2000 owed on this car, I also told him that they said they would finish paying it off to help pay off a debt they had owed us. He completely misunderstood me and thought I was telling him we were going to make the payments ourselves, which he was completely fine with; however he isn’t fine with my parents making payments on something that we are going to be using.In the end before I had re-explained how things were going to take place, he disagreed with us getting the car because he thought that they were just simply going to make the payments and also pay us back what they owed us from a previous encounter when they had borrowed some money. I ended up re-explaining things to him and told him that what he thought wasn’t the case that they were only going to pay off the car, n ot pay off the car and pay off the debt.So now that he knows what exactly is going to happen, he has agreed with letting them pay off the car and giving it to us. How can you make sure that this kind of miscommunication does not happen in the future? Or when it does happen, what could you do to make your communication more clear? Miscommunication will always happen, however I could take actions to make sure my point is across and that everything I say is understood the exact way I say it and not the way my fiance interprets it would be by asking him what he thinks I meant before ending the conversation.References Close Relationships Sometimes Mask Poor Communication, January 24, 2011 http://health. usnews. com/health-news/family-health/brain-and-behavior/articles/2011/01/24/close-relationships-sometimes-mask-poor-communication Sole, K. (2011). Making connections: Understanding interpersonal communication. San Diego, CA: Bridgepoint Education, Inc. https://content. ashford. edu/books /AUCOM200. 11. 1

Compare and Contrast Gibson’s and Gregory’s theories of perception

Gibson’s and Gregory’s theories of perception both suggest that eye-retina is important for perception. The both believe that without eye-retina, a person will not be able to see. This is a common view of both of the theories of perception. The idea is supported by the case of SB. SB was a man who had been blind from birth due to cataracts. When he was 52, he had an operation which restored his sight and hence he could see. Thus, this case has shown the importance of eye-retina for things to be perceived.And therefore, supports both of theories of perception which eye-retina is essential for perception. Gibson believes in the direct theories of perception which he used the theory of bottom-up processing to explain visual illusions whereas Gregory believes in the indirect theories of perception and he used the theory of top-down processing to explain visual illusions. The bottom-up are based on the assumption that we work upwards in our analysis of the visual world form basic sensory inputs at the bottom level towards the higher, more cognitive levels of the brain.The top-down processing theories are based on the assumption that we can only perceive our visual world accurately if we use stored knowledge and problem-solving skills. Thus, there are differences between their theories of perception. Gregory’s indirect theory of perception and Gibson’s direction theory of perception had led to the debate of nature-nurture. This is a big debate in Psychology whether perception is determined by genetics as proposed by Gibson’s theory or whether it is learnt or determined by upbringing and social context as proposed by Gregory’s theory.On the one hand, Nativists think that nature is more important factor which people are the products of their genetics and that we are born with certain behaviours. On the other hand, empiricists think that experience and nurture is the more important factor. They think that situational factors and upbringing have a greater influence on outcome. An eclectic approach might show that it is an interaction between nature and nurture and that neither side can tell the full story. It may be that a genetic predisposition to perception exists, but that situational factors also have to be in place for it to develop.Apart from the above, there are a few more differences between Gibson’s and Gregory’s theories of perception. Gregory believes that additional processing is required for perception which some forms of background knowledge is needed to make sense of the environment than just the sensory input while Gibson believes that perception is part of an inbuilt adaptive mechanism for survival which does not rely on stored knowledge or past experience. Gregory believes that expectations have an impact on perceptions which Gibson disagrees.There is empirical evidence supporting the idea of Gregory, and this comes from a study carried out by Simons and Levin. 50% of the par ticipants failed to realise that there was a switch of people. This is probably due to the fact that the participants had not expected a change of person. Hence, they were unable to perceive it. Furthermore, a study carried out by Selfridge also supports the idea of Gregory. Selfridge’s study demonstrates that our perceptions are mediated by our expectations as people are able to read the figures as ‘’the cat’’.This is because people have the expectations of the cat as they are words in common usage. These studies have shown that people saw what they have been expecting to see. Thus, the study demonstrates that expectations affect perception. And hence suggest that Gregory’s theory of perception might be right instead of Gibson’s. Gregory also suggests that we use context for our perceptions which Gibson disagrees. There are supporting evidences for Gregory’s assumptions. Selfridge’s study has shown context effects on vis ual perception. This study suggests that context aids perception.Similarly, Boring has demonstrated the use of top-down processing as well as the fact that context influences visual perception. These two studies demonstrate that visual perception is influenced by context. In addition, Gregory’s idea is supported by the study carried out by Warren which context influences auditory perception as well. The participants used context to hear the word in the sentence entirely. This shows the importance of context which helps to fill in the missing words. These findings suggested that it may be true that context is necessary for perception to occur successfully.These studies support Gregory’s theory instead of Gibson’s. Furthermore, Gregory’s theory explains how we can make errors in perception. For instance, we do not necessarily see spelling errors in our written work as we word- through-context. Besides, Gregory suggests that we use stored knowledge and past experience to make sense of our visual environment which Gibson does not agree. Moreover, Gregory suggested that some forms of background knowledge, through learning, are needed to make sense of the environment than just the sensory input as suggested by Gibson.Gregory said that, when looking at the Muller-Lyer figure, the line on the left looks longer than that on the right. He believed that this was because we were using top-down processing and assuming that the figure on the left is like the corner of a room that we are in, while the figure on the right is like the corner of a building seen from the outside. Hence, this suggested that we use context for our perceptions. He also pointed to the idea of the hollow mask. When we see a hollow mask from the inside, we perceive it as pointing outwards, because this is what we are used to.However, there are problems with Gregory’s outlook. Firstly, if we take a derivation of the Muller-Lyer illusion and replace the arrows with cir cles, we can see that the effect still holds, even though we could not possibly be imagining the corners of rooms or buildings, etc. Thus, Gregory’s assumption of the theory of perception might be wrong. Furthermore, Gibson argues that information form visual illusions should not be used because it is a fake stimulus that could not happen in the real world which suggested that the theory cannot be applied in real life situation.However, visual illusions do happen in real life such as trains and car wash. Even so, Gibson believes in the direct theory of perception which is an opposing theory to Gregory’s. He believes that we do not need prior knowledge to perceive objects correctly. Gibson suggests that perception is shaped by biological inheritance instead of what Gregory has suggested. According to Warren and Hannon, participants were able to make judgements about direction using dots which support Gibson’s optic flow patterns.And this demonstrates that Gibsonà ¢â‚¬â„¢s theory might be right instead of Gregory’s. However, study carried out by Lee and Lishman has shown that adults have more experiences about the world than children and thus has cast doubt upon Gibson’s theory. Also, a study carried Hahn, Anderson and Saidpour has demonstrated that regardless of which condition the participants were, they could tell direction and movement. And this finding goes against Gibson’s idea of optic flow. Thus, Gibson’s theory might not be right, instead, Gregory’s theory might be more realistic.