Constraints of literacy in developing countries Essay Example for Free

Constraints of literacy in developing countries Essay Poverty and illiteracy go hand in hand. Majority of the illiterate women live in countries with increasing economic difficulties and enormous debt burdens. The existence of multiple causes such as discrimination and deprivation against the female population is easily revealed (E. Malmaquist, 1992:19-20). Two hypothesis (1) barriers and (2) effects are constraints of literacy. Both will be examined and broken down for better understanding as to why they correlate with education to affect womens development.coge ger segegew orge gek inge foge ge. Several barriers reveal important patterns and trends in womens education in developing countries[1]. Each indicators leads to the same conclusions: the level of female education is low in the poorest countries, with just a handful of exceptions and by any measure the gender gap is largest in these countries.[2]cogg ggr seggggw orgg ggk ingg fogg gg.  Literacy Ratescoef efr seefefw oref efk inef foef ef. Literacy is one of the principal goals of education around the world. The ability to read and write is considered almost a basic human right. Yet low literacy rates prevail among women in many developing countries a staggering figure of twenty percent for female adult literacy rate (E. King, etal, 1997: 2). According to Malmquist (1992) women often face practical barriers to their participation in literacy programmes[3] (19). One must realize that even though literacy is not the only means to development it should be considered an essential instrument in the right direction to growth potential (25). This work from www.academicdb.com In Afghanistan, Burkina Faso, Nepal, Somalia and Sudan, fewer than ten percent of women are literate, while male literacy rate is not so low. The percentages of men who are literate are three to four times larger. Among other countries the gender gap is noticeable large: Libya 30%, China 38%, Zaire 26%, Botswana 21% and Turkey 23%.[4]coge ger segegew orge gek inge foge ge. Obstacles to literacy  Womens place is in the home. Subsequently, we have heard this phrase many times over. In several developing countries, this saying is true for while the men folk are away from the home, the women take over the mens work while attending to their customary chores. On their shoulder lie the responsibilities of the household, children and the work of the fields. Even though men work from sunrise to sunset, a womans work is never done. Many women rise at four or five oclock in the morning with a lot of chores to be completed before day is done. [5]coca car secacaw orca cak inca foca ca: Frequently a woman covers long distance carrying wood, water and farm products (K. Chlebowska, 1990: 83). It is no wonder these women have no opportunity in pursuing an education that will enable them in their developmental process if they have no time for the betterment of themselves.coca car secacaw orca cak inca foca ca; Educationcoaf afr seafafw oraf afk inaf foaf af;  According to Chlebowska, in 1985 some 130 million children[6] eighty percent of who were girls did not attend school. Insufficient numbers attending school, dropout and absenteeism are variables of the education of girls. Distance from school is one of several obstacles to school attendance. In rural areas where transport facilities are limited, parents hesitate to send their daughters to a remote school outside villages or homes. If transport exists they are not free and parent who are poor must either abandon schooling or make a choice, which is always the determinant of the girl staying at home (K. Chlebowska, 1990: 72). sabir4u, please do not redistribute this project. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this project elsewhere on the internet. Anybody found doing so will be permanently banned. School dropout is more frequent amongst girls. Also engagement, marriage and motherhood contribute to school dropout. The percentage of girls in primary schools in developing countries is lower than that of boys. A case in point is in Africa in1987 the rate of enrolment of boys aged 6 to 11 was 69% and that of girls only 56% for the same age group. In Asia 77% boys attended school while 59% girls did not (73). sabir4u, please do not redistribute this paper. We work very hard to create this website, and we trust our visitors to respect it for the good of other students. Please, do not circulate this paper elsewhere on the internet. Anybody found doing so will be permanently banned. In summing one can ascertain that under-attendance of girls at school attributes to less being able to neither read nor write. The reasons are that many of these girls live in rural areas and are generally poor. Parents do not see the attendance of their daughters in school a necessity and not essential when there are household chores to be performed, which in the eyes of mothers and grandparents are more important than education, whereas it is for boys as they turn out to become heads of the households (K. Chlebowska, 1990: 74).coec ecr seececw orec eck inec foec ec; As we have observed there are constraints put into place, which affect womens literacy in developing countries. Subsequently, it is more difficult for women and girls to acquire an education while boys are given more of an opportunity to do so. As a result, due to this kind of restriction on women the manifestation of gender-gap has astronomical influence that is irreparable.codb dbr sedbdbw ordb dbk indb fodb db.

The audiences attention in a number of different ways Essay Example for Free

The audiences attention in a number of different ways Essay The opening scene catches the audiences attention in a number of different ways. Discuss how the playwrite, Willy Russell, has achieved this and whether he has been successful. The opening scene of Educating Rita is one that really catches the audiences attention in many different ways and to which some can relate to, be it through actions taken or through a characters attitude. The scene deals with and introduces the problems of both Frank and Rita, without going into depth over either of the characters troubles too soon. It is the instant clash of wit that catches the audiences attention. Russell also uses stage direction aswell as his characters personalities to keep information on these two characters flowing. He also uses symbolism as a further way of describing his characters without it being too obvious to his audience that hes letting on more and more about them. Act 1 scene 1 is the introductionary stage to Russells characters. In the first five minutes of this scene, we get to know Frank quite well. We learn that Frank is a university lecturer who appears to have grown tired of his job and the same old people. We see him searching the rows and rows of literature in his office for an author beginning with E; he then seems to decide he wants Dickens. Once he finds his collection of Dickens, he pulls them out, to reveal a bottle of Whiskey. We learn now that Frank also has a drinking problem. The phone then rings, just as Frank is about to take a swig of his Whiskey, and it turns out to be Julia, Franks girlfriend. They have a conversation that increases in venom until theres a knock at Franks door. Whoever is on the otherside of the door is having trouble making their way inside, and so Frank begins to get irritated with their posistant knocking after he has already said, Come in.. a few times. Eventually Frank hangs up the phone and Rita (actual name: Susan White. Likes to be called Rita after the author of Rubyfruit Jungle, Rita Mae Brown) bursts into the room. This womans behavior and language stun Frank, until they get talking and realize they get on well. Soon we learn that Rita/Susan (a hairdresser) has signed up for an Open University course, and Frank is to be her tutor. At first meeting, these two people appear to contrast greatly, but soon enough the audience begins to understand they have more in common than first thought. Frank is run down due to his heavy drinking, and his perception of the world is dim. He can no longer be bothered with his job, teaching the same old things, hearing the same old opinions and tutoring the same old people. His relationship with his girlfriend, Julia (an ex-student) is well and truly on the rocks, which the audience can tell from their frosty phone conversation at the beginning of the scene. Rita is also bored of her job. Shes bored of the same conversations with the same sort of people over the same sorts of haircuts. We dont learn about Ritas husband in scene 1, but things arent going well between them, like Frank and Julia. Denny believes Rita should stay home, take care of the house and every couple of years have a child, the usual behavior for a housewife in the 1980s; he isnt happy with Ritas choice of enrolling in an Open University course at all. In Rita, Frank finds the breath of fresh air both he and his job need, and in Frank, Rita finds someone to support and listen to her throughout her studies. Despite these similarities between the pair, there are still differences. Ritas idea of a classic novel is an erotic one (Rubyfruit Jungle) and her idea of a classic poet is Roger McGough. Franks main use for literature as Rita burst into his office is to hide his liquor, and he gave up on poetry long before Rita entered his life. Also, Rita is born-and-bred working class, whereas Frank is comfortable as Middle-class. This differ in social stature has an important effect on the language the two use and their accents. Still, nevertheless, the two click immediately. The stage directions at the beginning of scene 1 are very important, as through them we can fully imagine the setting of Russells play. We are told that the scene is set in a Victorian-built university in the north of England, so immediately we sense some class about the attendees of this place. We then get a description of the room, which is important as we understand the symbolism Russells uses right from the beginning. The book itself tells use about both the setting and the props used, but nothing about music or costume. In the film, directed by Lewis Gilbert, the music used is not something that could be found in the charts around the 1980s. Its a string piece that helps in setting the scene of a university where the students are more than happy to act a class above their own. But, we have to consider that even though the music used in the film was perfect for setting the scene for the theme throughout the entire play, its only one directors choice of music. The same goes for the costumes used in Gilberts production. The audiences attention is sub-consciously caught through Russells use of symbolism throughout the play. Franks office is a huge reflection on his own attitude. He hid his whiskey behind Dickens, and in real life he dodges the subject of his drinking problem with lines from classic literature. Also, nothing really has a place in Franks office, apart from his alcohol, also like real life. The more obvious symbolism used in scene 1 is Franks window and his door. His door can be thought of as the door to Frank himself. Its hinges are stiff, and so people have trouble getting past it, and always have done, but when Rita comes along, its different. The more Rita goes to see Frank, and comes into contact with this door, the easier it is for her to get past it. At first she oils it, but eventually theres no need for oil or force, it just opens. This is when Rita has broken through to Frank, and has worked her way through to his heart. This is something that no one has done before. Also, we could consider the door symbolism of Ritas entry to higher education. She desperately wants to study, but neither her mother nor her husband think she should. The trouble Rita has getting the door open could symbolize the last obstacle. From then on she struggles with this education, and with the door, but in the end she finds both easy to handle. The use of the window in Franks office symbolises a point in each characters development. Rita is ambitious to be like other students in the university, after she watched them from Franks window. She watches them, and asks Frank whether they could have a tutorial on the grass, but she fails to convince Frank of the benefits. The window, like Frank hasnt been opened for generations. Rita desires the breath of fresh air and wants to get educated. In contrast, Frank is more than content to remain isolated and remain in his insular office. I believe the opening scene of Educating Rita is very effective when capturing the audiences attention. The introduction of both characters traits, and how they react to each others opinions and personalities is both funny and moving throughout the play, but most interesting in this opening scene. This play also has underlying messages which make sense even nowadays, around 20 years after the play was written. Such as Ritas perseverance with her higher education instead of giving in to the stereotype of a woman at this time even though everyone around her (her mother and her husband) thinks she shouldnt be enrolling in her Open University course. In this respect, Rita is admirable, and shows that anything can happen to anyone if they simply keep at it. The audience simply must keep reading, as together Rita and Frank spark. Rita can study without judgement, and Frank is happier around Rita than he has been for years. These two characters gradually learn to help each other, and it is that element of their relationship that keeps the audience interested.

Advantages And Disadvantages Of Firewalls Computer Science Essay

Advantages And Disadvantages Of Firewalls Computer Science Essay A firewall is a boundary or a wall to keep intruders from attacking the network. The firewall is network device that is in between a private network and the internet. The firewall is configured to inspect network traffic that passes between the network and the internet. We can assign rules or protocols to the firewall to allow data to be shared. If the protocol isnt included in the approved list it would destroy or discard the packet of data and deny it from entering the network. When a private network is connected to the internet it allows the people to access information from external sources .when the network is connected to the internet it also allow external uses to enter the private network and steal information from the network. To prevent unauthorized access organizations has firewalls to protect them. There are mainly two types of firewalls. Software firewalls and hardware firewalls. A firewall provides configurable network access, authentication before accessing services and other services as well. Scope I will be covering only the 3 types of firewall types, the characteristics of firewalls, types of attacks to an organization, other devices that can be used in place of a firewall. I wont be covering the configuration of firewalls. Firewall What is a Firewall There are basically two types of Firewalls. They are software and hardware Firewall. A firewall is a software or hardware that filters all network traffic between your computer, home network, or company network and the internet. As shown in figure 1 the firewall usually sits between a private network and a public network or the internet. As shown in figure 1 a firewall is kept in the boundary of the privet network and the public network or internet. Figure Firewall A firewall in a network ensures that if something bad happens on one side of the firewall, computers on the other side wont be affected. Depending on the firewall type there many features such as antivirus guard, intrusion prevention etc. Type Of attacks (http://technet.microsoft.com/en-us/library/cc959354.aspx) There are many types of attacks to a network. These are some of them IP Spoofing Attacks IP Spoofing Attacks are where an attacker outside the network may pretend to be a trusted computer either by using an IP address that is within the range of IP addresses for the local network or by using an authorized external IP address that has authorized access to specified resources on the local network. Denial of Service Attacks(DoS Attacks) Denials of Service Attacks are attacks just to make a service unavailable for normal use by flooding a computer or the entire network with traffic until a shutdown occurs because of the overload. The attacker can also block traffic, which results in a loss of access to network resources by authorized users. Denial of service attacks can be implemented using common internet protocols, such as TCP and ICMP. Sniffer Attack A sniffer attack is an application or device that can read, monitor, and capture network data exchanges and read network packets. If the packets are not encrypted, a sniffer provides a full view of the data inside the packet. Even encapsulated (tunnelled) packets can be broken open and read unless they are encrypted. Man in the Middle Attack As the name indicates, a man in the middle attack occurs when someone between you and the person with whom you are communicating is actively monitoring, capturing, and controlling your communication transparently. To prevent such attacks a computer or network should implement a firewall to the companys specifications, so that the firewall will protect the network without been a problem for the employees of the company. Types of Firewall (Google book) Packet filtering routers Packet filtering routers were the first generation of firewall architectures to be invented. Packet filtering firewalls work at the network level of the OSI model, or the IP layer of TCP/IP. As shown in figure 2 a Packet filtering routers will be placed between the boundary of the private network and the public network or internet. Packet filtering routers can provide a cheap and useful level of security to the network. Depending on the type of router filtering can be done at the incoming, outgoing interfaces or both interfaces. Packet filters work by applying a set of rules to each incoming or outgoing packets.The rules are defined based on the network security policy of the enterprise. According to these set of rules the firewall can forwarded or drop the packet. A packet filtering router is able to filter IP packets based on the Source IP address Destination IP address TCP/UDP source port TCP/UDP destination port Packet filters works well for blocking spoofed packets. It also can be used for Block connections from specific hosts or networks Block connections to specific hosts or networks Block connections to specific ports Block connections from specific ports Figure Packet filtering routers The three types of filtering firewall Static Filtering It is one of the oldest firewall architecture and it operates in the network layer. The administrator can define rules which packets are accepted and which packets are denied. The static filter will scan for IP header data and TCP header data. Advantages of Static Filtering Low impact on network performance. Low cost included in many operating systems. Disadvantages of Static Filtering Because it operates in the network layer it examines only the IP header and TCP header. It is not aware of the packet payload. Offers low level of protection. Dynamic Filtering Dynamic Filtering works on the network layer. These firewalls are the most common sort of firewall technology .The decision will to deny or allow the packet will be based on the examination of the IP and protocol header. Dynamic filter can differentiate between a new and an established connection. After a connection is established its information is kept in a table in the router. Advantages of Dynamic Filtering Lowest impact on network performance Low cost Because it can differentiate between a new and an established connection it increases performance. Disadvantages of Dynamic Filtering Because it operates in the network layer it examines only the IP header and TCP header. Provide low level of protection Stateful Inspection Stateful inspection is a technology that is similar to dynamic filtering, with the addition of more granular examination of data contained in the IP packet Advantages of using firewalls based on packet filtering Low cost. Packet filters make use of current network routers. Makes Security Transparent to End-Users. Easy to install. Packet filters make use of current network routers. Therefore implementing a packet filter security system is typically less complicated than other network security solutions. High speed Packet filters are generally faster than other firewall technologies because they perform fewer evaluations. Disadvantages of using firewalls based on packet filtering Packet filters do not understand application layer protocols. Packet filters does not offer any value-added features, such as HTTP object caching, URL filtering, and authentication because they do not understand the protocols being used. Packet filtering routers are not very secure. Cant discriminate between good and bad packet New rules may be needed to be added if an employee needs special requirements to connect to the internet. Difficulty of setting up packet filtering rules to the router There isnt any sort of user based Authentication. Packet filter cannot authenticate information coming from a specific user. (http://www.cse.iitk.ac.in/research/mtech1997/9711107/node14.html) Circuit level gateways Circuit level gateways are the second generation of firewall architectures. Circuit level gateways work at the session layer of the OSI model. It is basically a packet filter with additional features. In figure 3 shows a circuit level gateway works. The circuit level gateway examines and validates TCP and UDP sessions before if open up a connection or circuit through the firewall. So it will provide more security than the static packet and dynamic packet filter. The decisions to accept or deny packet is based on examining the  ·Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Source address  ·Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Destination address  ·Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Application or protocol  ·Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Source port number  ·Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Destination port number Figure Circuit level gateways (William Stallings,) Advantages of firewalls based on Circuit level gateways Less impact on network performance. Breaks direct connection between the untrusted host and trusted client. Higher level security than the packet filter firewalls.. Disadvantages of firewalls based on Circuit level gateways Does not examine the packet payload. Low to moderate security level. Application level gateways The third generation of firewall architectures is called Application level gateways. Application level gateways are capable of inspecting the entire application data portion of an IP packet. When a computer sends a request to the internet the firewall inspects the entire packet against the rules configured by the network or firewall administrator and then regenerates the entire Internet request before sending it to the destination server on the Internet. The returned result will then again will be inspected, if the result meet the requirement of the rules then it will be allowed to pass through the network and into the network, then the firewall will create a response packet and send it to the corresponding computer. If the result does not meet the requirement of the rules then it will be blocked from passing through the network. The figure 4 shows an Application level gateway. Figure Application level gateways Advantages of Application level gateways The application proxy can inspect the entire application portion of the IP packet. This inspection happens both when the Internet request is sent and when the reply packet from the Internet server is returned. Highest level of security Because the application proxy understands the application protocol, it can create a much more detailed log file of what is sent through the firewall. Packet filter log files know only about the IP packet header information. The internal computer and the server on the Internet never have a real connection, because the firewall inspect the packet and then regenerates it. Proxy services understand and enforce high-level protocols, such as HTTP and FTP. Proxy services can be used to deny access to certain network services, while permitting access to others. Disadvantages of Application level gateways Application level gateways require great memory and processor resources compared to other firewall technologies. Have to create filter rule for each application individually. Must be written very carefully Vendors must keep up with latest protocols Software firewall For home users software firewalls are the most popular firewall choices. In figure 5, 6 and 7 are some of the most popular software firewalls in the market. Software firewalls are installed on your computer or server computer like any other software .The firewall can be customize it if necessary allowing you some control over its function and protection features. A software firewall will protect your computer from unauthorized access to the network or home pc and in most software firewall it provides protection against Trojan programs, e-mail worms, antivirus, antispyware and intrusion detection etc.  Software firewalls will only protect the computer they are installed on and not the whole network, so each computer will need to have a software firewall installed on it. There are vast numbers of software firewalls to choose from. A good software firewall will run in the background on your system and use only a small amount of system resources. It is important to monitor a software firewall once installed and to download any updates available from the developer. Norton Internet Security Figure Norton Internet Security Zone Alarm Extreme Security Figure Zone Alarm Extreme Security Kaspersky Internet Security Figure Kaspersky Internet Security Hardware Firewalls As seen in figure 8 hardware firewalls can be purchased as a stand-alone product, in present hardware firewalls are integrated in broadband routers. These will be very important for people with broadband connection for their company network. Hardware firewalls can provide better security and reduce the performance loss by using dedicated memory and processing power .They also can protect every machine on a local network. Most hardware firewalls will have a minimum of four network ports to connect other computers. A hardware firewall  uses packet filtering to examine the header of a packet to determine its source and destination. This information is compared to a set of administrator created rules that determine whether the packet is to be forwarded or dropped. Figure Hardware Firewalls Firewall Characteristics Design goals of a firewall Every firewall has design goals. Because if the firewalls does not achieve these design goals the firewall will be a huge security risk to an organizations network. According to the security policy only Authorized traffic should pass through the firewall. All inbound and outbound traffic should pass through the firewall. The firewall should be immune to penetration. Four general techniques to control access Service control Determines the types of Internet services that can be accessed, inbound or outbound Direction control Determines the direction in which particular service requests are allowed to flow User control Controls access to a service according to which user is attempting to access it Behavior control Controls how particular services are used. Advantages of Using a Firewall A Company network or a home computer will have number of advantages when using a firewall. They are more cost effective than securing each computer in the corporate network since there are often only one or a few firewall systems to concentrate on. There are some firewalls which are able to detect viruses, Trojans, worms and spyware etc. There are Disadvantages of Using a Firewall Even if a firewall helps in keeping the network safe from intruders, but if a firewall is not used properly it would give a false impression to you that the network is safe. The main disadvantage of a firewall is that it cannot protect the network from attacks from the inside. They often cannot protect against an insider attack. Firewalls cannot protect a network or pc from viruses, Trojans, worms and spyware which spread through flash drives, potable hard disk and floppy etc. They may restrict authorized users from accessing valuable services. They do not protect against backdoor attacks. They cannot protect the network if someone uses a broadband modem to access the internet. (http://www.linktionary.com/f/firewall.html)must see Other devices that could be used in place of firewalls Antivirus Software Antivirus software is a programme detects and prevents malicious software programs such as viruses and worm. Malicious software programs are designed to infiltrate the computer network through the internet connection and cause damage to the system. These programmes are installed without the users knowledge. To prevent such programmes from been installed an antivirus has to be installed in every computer on the network. To prevent the latest malware from infecting the computers the antivirus software has to be up to date with the latest antivirus definitions from the developer. E.g.:- Norton antivirus, Kaspersky antivirus etc. Spyware Software Spyware is a type of malware that is installed in the pc without the knowledge of the user, it secretly collects personal information and monitors browsing activities of the computer user. Like antivirus software spyware software has to be updated regularly with the latest definitions. Most antivirus softwares has spyware protection. E.G.:-Spyware doctor, Norton antivirus etc. The purpose of using these devises Critical Analysis In todays world there are so many security risk a computer network cannot be fully protected. Even if a firewall gives protection from outside intruders it cannot protect the network from the inside. I have analyse the network security and come to a conclusion that network to be secured, they should use a hardware firewall to inspect all the outbound and inbound request and a software firewall to protect from other threats such as malware, Trojans, viruses, worms etc. In todays world there are many hackers who would want to hack a company for fun or for money and there are thousands of viruses rereleased to the internet every day. Threats can attack a network of computers in many ways, for example if the firewall allows emails to be sent and received and if an infected email is sent by an intruder, it will pass through the firewall and infect all the computers in that privet network. A software firewall may be considered as an antivirus guard which has a firewall, so this means that this type of software firewalls has more features than just only the firewall. It may have antivirus, spyware, intrusion, browser, email protection and may have many other features as well. As Ive taken the example of the email when the email is been received it will be scanned and filtered if it is detected as spam mail or it will be allowed to enter the network. Because the viruses are becoming more advance the software firewalls has become more advance in detecting threats. Some antivirus software uses three main different approaches to detect threats. They mainly use definition based detection. This is where the software detects viruses and other threats by checking for a known malicious code with the definitions and be removed or deleted. The second main approach is where the software uses is behaviour based detection. This is where the software looks at the installed software or downloaded softwares behaviour. If the software behaviours in suspicious manner where it is collection personal information without the users knowledge it will be removed. Behaviour based detection is more of an advance approach for antivirus software because it does not need the virus definitions to detect threats, it will detect threats even before the virus definitions are been downloaded. The third main approach is cloud based detections. This is where the antivirus company keeps a record of known suspicious and dangerous software in their databases, which has been collected by the antivirus company over the past years. If a user downloads software the antivirus guard will check the downloaded software with their companys databases of known suspicious and dangerous software to see if it is a threat or not to the user. These three approaches of a software firewall will help keep the network safer if the hardware firewall fails to detect threats. These antivirus help protect the network from intrusions through another computer or vulnerabilities in a software installed on a computer. This feature scans all ports the network traffic that enters and exits your computer and compares this information to a set of signatures or definitions. These signatures contain the information that identifies an attackers attempt to exploit a known operating system or program vulnerability. If the information matches an attack signature, Intrusion Prevention will automatically discard the packet and breaks or blocks the connection with the computer that sent the data. A privet network should have a good antivirus programme with all the above mention features and more. Antivirus software like Norton, BitDefender etc are superior antivirus softwares. So I think if there are both hardware and software firewalls in place in the network it will be more secure to threats and vulnerabilities. This is because if the threat is not detected by the hardware firewall there is a chance that the software firewall will detect it. Because these firewall are becoming more sophisticated with advance technology to detect threats these firewalls will be the next defence if the hardware firewall fails to detect the threat. Conclusion

Goldratts The Goal Essay -- Goldratt Goal Bottleneck Essays

Goldratt's "The Goal" â€Å"The Goal† by Goldratt is a book about the Theory of Constraints, TOC. It is about the behavior of manufacturing facilities. It deals with bottlenecks that are the manufacturing constraints and the variability that creates them. The book states that a manufacturing organization cannot run at 100% and that you cannot balance the assembly line. It seems that your efforts for efficiency must be focused on the worst bottleneck. The loss caused by a bottleneck is a loss for the entire system. Focusing on improving the throughput of the bottleneck increases the flow for the entire manufacturing line. If there is a bottleneck, then all other areas are capable of excess capacity. Don’t try to improve non-bottlenecks, as it is a waste of time and effort. The TOC integrates into Total Quality Management, TQM, except for one main theory. TQM supports continuous improvement of the system while the TOC does not support continuous improvement of every process. The TOC says that we must focus on the constraint. Q: What is the Theory of Constraints about? A: Developed by Dr. Eliyahu M. Goldratt, TOC states that any system has at least one constraint. Otherwise, it would be generating an infinite amount of output. Bearing this in mind, TOC is easily explained through use of the "chain" analogy - "a chain is only as strong as its weakest link." If we look upon our organization as a chain, where each department is a "link" in the chain, what constrains our organization from achieving its goal? Only through addressing the weakest link, the constraint, can substantial improvements be made. In other words, if the constraint dictates the pace of an organization's ability to achieve it's goal, it makes sense that addressing the constraint will allow the organization to achieve a substantial rate of throughput faster. There are five steps in applying TOC: 1.  Ã‚  Ã‚  Ã‚  Ã‚  Identify the system's constraints. Of necessity this included prioritization so that just the ones that really limit system progress toward the goal. 2.  Ã‚  Ã‚  Ã‚  Ã‚  Decide how to exploit the system's constraints. Once we have decided how to manage the constraints within the system, how about the majority of the resources that are not constraints? The answer is that we manage them so that they just provide what is needed to match the output of the constrained resources. We NEVER let them supply mo... ...achine was running and an operator on your line was to set it up if it went down, you could take your break at your convenience. A few months went by and new coaches were hired. They decided they wanted to closely monitor the operator to see when they took their breaks and for how long. The decision was made to stop the machines when you go on your break and/or lunch. The new coach obviously wanted to make a good impression and bring something new to the table. They changed our staggered breaks to scheduled breaks. The results after a few weeks showed production was down and efficiency was at a record low. It showed machines were not running at full capacity for a tour. Immediately their superiors decided we would go back to the staggered lunches and breaks. The downtime was then reduced and our departmental efficiency went up. They realized it was not as important to monitor the person, as it was to have the machine running. Now I know this does not stand up to the problems Alex and his staff faced with UniCo but this is what I face everyday. I found a case study that was used at the TOC World 2000 Seminar in St. Paul MN last year. I thought I would include it for your enjoyment

Molecular Aspects of Biofilm Essay -- Biology, Cluster of Cells

Almost all bacteria are known to have certain stage of life where they live in form of biofilms. A biofilm is nothing but cluster of cells embedded within a self-produced polymeric matrix and adherent to a living or inert surface (Costerton et al, 1995). Development of biofilm begins with the attachment of planktonic bacteria to a surface, initially through weak and reversible Van der Waals forces and then anchors itself irreversibly by cell adhesion structures such as pili. The primary colonizers facilitate the arrival of other cells by producing polymeric adhesion matrix that also holds the biofilm together (Costerton et al, 1995). In course of colonization and maturation of biofilm, cells communicate via quorum sensing which also leads to phenotypic and genotypic changes in cells (Diggle et al, 2007). This development of biofilm confers bacterial cells higher antibiotic resistant and immunity to environmental insults. Enhanced antibiotic resistance due to biofilm development impo ses increasing concerns in antimicrobial therapy, especially when it comes to biomedical devices associated infections (Donlan, 2001). According to an estimate, contamination of surgical instruments by biofilm increases approximately 1.6 billion dollars in hospital expenditures annually in United States of America (Gupta et al, 2002). Biofilms not only cause nuisance in clinical aspects but they also create a number of serious problems in industrial operations like in fluid processing operations, mechanical blockages, impedance of heat transfer process, and biodeterioration of components of metallic and polymeric systems that results in loss of billions of rupees each year (Rao et al, 1993 and 2009; Fleming, 2002; Boffardi, 2005). Pseudomonas aerugi... ...s censored i.e. some part of sample may lost before the final outcome is speculated or speculation itself is incomplete (Kaplan & Meier, 1958). In KM survival plot, survival probability is measured after certain time periods and between two sampling time points survival probability is assumed to be constant so as an outcome we speculate a series of horizontals steps of survival probability over a period of time (Bland & Altman, 1998). Survival probability was calculated as P=Nt/N. Where P is survival probability, N0 is initial number of cells, Nt is number of viable cells after giving biocide doses at t time. Standard error in P was calculated as SE=√[P(1-p)/N] The upper and lower limit of 95% confidence interval were calculated as =PÂ ±1.96*SE. The upper limit of probability of survival of cells at different doses were taken into account for plotting the graph. Molecular Aspects of Biofilm Essay -- Biology, Cluster of Cells Almost all bacteria are known to have certain stage of life where they live in form of biofilms. A biofilm is nothing but cluster of cells embedded within a self-produced polymeric matrix and adherent to a living or inert surface (Costerton et al, 1995). Development of biofilm begins with the attachment of planktonic bacteria to a surface, initially through weak and reversible Van der Waals forces and then anchors itself irreversibly by cell adhesion structures such as pili. The primary colonizers facilitate the arrival of other cells by producing polymeric adhesion matrix that also holds the biofilm together (Costerton et al, 1995). In course of colonization and maturation of biofilm, cells communicate via quorum sensing which also leads to phenotypic and genotypic changes in cells (Diggle et al, 2007). This development of biofilm confers bacterial cells higher antibiotic resistant and immunity to environmental insults. Enhanced antibiotic resistance due to biofilm development impo ses increasing concerns in antimicrobial therapy, especially when it comes to biomedical devices associated infections (Donlan, 2001). According to an estimate, contamination of surgical instruments by biofilm increases approximately 1.6 billion dollars in hospital expenditures annually in United States of America (Gupta et al, 2002). Biofilms not only cause nuisance in clinical aspects but they also create a number of serious problems in industrial operations like in fluid processing operations, mechanical blockages, impedance of heat transfer process, and biodeterioration of components of metallic and polymeric systems that results in loss of billions of rupees each year (Rao et al, 1993 and 2009; Fleming, 2002; Boffardi, 2005). Pseudomonas aerugi... ...s censored i.e. some part of sample may lost before the final outcome is speculated or speculation itself is incomplete (Kaplan & Meier, 1958). In KM survival plot, survival probability is measured after certain time periods and between two sampling time points survival probability is assumed to be constant so as an outcome we speculate a series of horizontals steps of survival probability over a period of time (Bland & Altman, 1998). Survival probability was calculated as P=Nt/N. Where P is survival probability, N0 is initial number of cells, Nt is number of viable cells after giving biocide doses at t time. Standard error in P was calculated as SE=√[P(1-p)/N] The upper and lower limit of 95% confidence interval were calculated as =PÂ ±1.96*SE. The upper limit of probability of survival of cells at different doses were taken into account for plotting the graph.

History Of Computers :: essays research papers

History of Computers Introduction:   Ã‚  Ã‚  Ã‚  Ã‚  The electronic computer has now been used commercially for less than 25 years. It grew out of a search lasting centuries for a more accurate, faster way to perform calculations.   Ã‚  Ã‚  Ã‚  Ã‚  Primitive and ancient man used his fingers, shells, beads, sticks, and other objects to keep track of numbers and sums. The development of paper and writing instrumentsmade it easier to record data, but gave little aid in manipulating it. Manual Devices:   Ã‚  Ã‚  Ã‚  Ã‚  A computer is sometimes defined as a system that mechanizes the processing of information. Even a manual device may fall under this definition if they are constructed in such a way that moving them by hand can produce the desired answer. Example: Abacus:   Ã‚  Ã‚  Ã‚  Ã‚  The abacus is the oldest-known mechanical computing aid. Its origin is uncertain. Many countries claim to have invented it. It was used in China as early as the sixth century B.C. and in the mediterranean areain ancient Greek and Roman times. It is still used in many parts of the world.   Ã‚  Ã‚  Ã‚  Ã‚  The abacus consists of beads strung on rows of wires suspended within a rectangular frame. A common form has a piece of wood dividing the beads, with five beads on one side, and two on the other side of the wood on each wire. Calculating Machines and their Inventors:   Ã‚  Ã‚  Ã‚  Ã‚  Through the centuries, several mathematical geniuses invented machinesto aid them in their calculations. The machines were never widely used and generally had no direct path to the later development of electronic computers. Example: Pascal:   Ã‚  Ã‚  Ã‚  Ã‚  Blaise Pascal (1623-1662) a French matematician, invented the first mechanical adding machine at age 19 in 1642. He became tired of adding long columns of figures while helping his father, who had been appointed administrator of Rouen by Cardenal Richelieu. His device had teen toothed wheels and many gears. Rotating wheels developed sums. A carry lever advanced the next wheel to the left one position when a sum exceeded 10. Punched Card Development:   Ã‚  Ã‚  Ã‚  Ã‚  Many of us are surprised to learn that the punched card industry is almost 200 years old. Furthermore, the first use of punched cards wasn’t for data processing, but rather for process control. Example: Jacquard:   Ã‚  Ã‚  Ã‚  Ã‚  Joseph Marie Jacquard (1752-1834), a French Weaver, in 1804 developed the first completly automatic loom, controlled by punched cards. Fearing that the machine would produce unemployment, workers attacked and destroyed his machine at Lyon. Aided by Napoleon, Jacquard rebuilt his machine, which os credited with promoting a thriving textile industry in France through the 1800s.

Family Power Debate

Affirmative for egalitarian sharing of the family power base. The family has consensus over who has the ultimate say on the day to day decisions. Present day family has very complex type of structure which affects the powerbase determination. A family consisting of a mother (female), father (male), and a child or two will have a very different power base than a family consisting of two same gender parents or a family that has a single parent. Age of the parents and the children also contributes toward power base; when the children are very young, the parents have the power and when the children grow they have their own control.Different cultures have varied family structure based on what they have learned from their parents and grandparents. Socioeconomic status and educational level also contributes to the powerbase in a family. Even though all these factors contribute toward the powerbase, it makes a difference, especially in regard to health care management and family wellness. An adult family member remains to be the traditional base of power in several families which the whole family must accept to make the authority effective.For example, according to Hoffman as cited by Friedman et al (2003), in a traditional nuclear family the husband still maintains more decision-making power over his wife and that â€Å"parents almost always have more power than children † (p. 299). The following statement challenges that this idea is not the healthiest balance in today’s diverse family environment.Affirmative StatementI propose that an egalitarian sharing of power in today’s environment will create healthier family functioning. â€Å"No change in the American Family is mentioned more often than the gradual shift from one-sided male authority to the sharing of family power by the husband and wife. Declining sex role traditionalism, like many social changes, correlates with increasing complexity and conflict in family decision making† (Fried man, 2003). It is often hard in today’s time to get two individuals to agree to the same values. With the economy the way it is currently it takes two incomes to keep a family a float.With two incomes needed this often times leads to the husband and wife sharing the power; in other words and egalitarian system of  power sharing. This sharing of power results from the husband and wife working different hours to provide care for the children at all times. Another reason this sharing of power occurs is that the females in today’s society want to feel equal in their relationships, fueling the need for recognition and equal sharing of power in a family structure. An advantage to this view is that structure must be carefully assessed and recognized prior to distinguishing powerbase.Family function –the intimate, interactive and interdependent sharing of values, decisions, and commitment over time† (Kaakinen, Gedaly-Duff, Coehlo, Harmon-Hanson, 2010, p. 22) det ermines structure and therefore establishes powerbase. In the healthy family, with an equal powerbase is not only perception but a reflection of these values and consideration of leadership and justice. In a family whose perceptions are based on bullying, domineering leadership or abuse, powerbase is reflected by actions committed in fear of punishment and retribution.The opposite is true when the structure of the power is based on equal sharing of decisions and actions as a result of this family interaction structure. This view considers the positive or negative family interactions (structure) to affect the behavior of family members and that powerbase derives recognition from these interactions. What may be considered as perception of the power-holder(s) in family is actually the result of the positive or negative family behavior in response to structure. In a study done by Schoppe, Mangelsdorf, & Frosch, (2001), powerbase is determined by family structure.SolutionPowerbase can co nnote failed impressions as well. Outward assessment of inward mutual support processes are the family system as it exists and as it functions. Changes in what is occurring are changes in support processes as well as actual changes in how individuals exist and experience. Powerbase within the family in a healthy or non-healthy environment is determined by family structure, if the powerbase is shared equally by the adults a better example will be demonstrated and mimicked by the children ( Kaakinen, 2012).