Friday, September 6, 2019
Corrosion, Repair and Maintenance of Structures Essay Example for Free
Corrosion, Repair and Maintenance of Structures Essay Chapter 1.0 Introduction In many places around the world, there are structures that have existed for a long time and either they are still being used or they are simply left there standing with no use at all to the public. For that reason, these structures that are no longer being used must be rehabilitated in order for them to be re-used in some way. When pertaining to structures, to rehabilitate means ‘to restore, to repair, to rescue from a state of corrosion’. The idea of rehabilitation came after the World War II when old buildings were starting to show damage through time or damage from human intervention. The easiest way to fix them was to restore them. That process today is very widely used and is a very familiar process, which applies to almost every structure on earthâ€â€from structures that need to be repaired to structures that need to have a completely different look or structures that need to expand. It can also be applied on structures that need to be strengthened in order to prolong its life for another set of years. Rehabilitation of structures, as a process, can save time, money and work. That is because there is no need for the demolition of an already existing structure and building again from scratch. Simply put, rehabilitation means that some changes or improvements need to be made. This process also saves space since there is no need for a new area in order to build a new structure.            In this paper, I am going to divide this process into three stages. The first stage is the corrosion, where I am going to explain all the factors that lead to corrosion of structures and how it affects them. The second stage is the part of repairing a structure after it has undergone corrosion. In this stage, I will mention ideas and ways that have been developed through the years which can be applied to existing structures that have been affected by corrosion. The third and final stage that will be discussed in this paper are the ways on how to maintain a structure and how to prevent further deterioration after repair in order to minimise its cost efficiency. Chapter 2.0 Corrosion Factors Introduction Corrosion is caused by a lot of factors and it often results to the failure of a structure. All these factors have to be studied in order to prevent structure failures. Corrosion, most of the time, is caused by extreme weather conditions but it is not the only factor that causes corrosion and it is also not the main cause of structure failures. By analysing corrosion and explaining how it happens, we can separate it in different areas. Factors of Corrosion Corrosion depends on many factors which we will focus on such as material, environment, stress, temperature and time factors. These factors are dependent and interconnected with each other. Material Factor            The material factor has to do with the materials that are used for the structure. Materials also has a connection with the environment where the structure is put up (i.e. weather, temperature, moisture, etc.), which we will discuss later in this report. The material factor is important as it all starts from the selection and planning before being able to build the structure. The selection process is divided into three stages.            The first one is listing the requirements taking into consideration the strength and other properties of the material. The second stage is choosing the most convenient material focusing on its technical properties and evaluating them. The last stage is based on the economical factor, which means that after going through the first two stages, we came up with a variety of materials and the only thing left to do is to choose the cheapest and most suitable material for the structure. The final process has to do with the fact that the structure is for repair and that redesigning the whole structure is not easy which means that more attention should be given on delivery time and completion. Environmental factor Environment is a crucial factor in corrosion of materials. This is caused by a lot of factors and the main factor that needs to be considered is that the materials have a tendency to expand or shrink depending on the changes in the temperature (Table 2 below shows some data on expansion of different materials) and also in areas where the weather changes from rainy to dry or vice versa in a short span of time. Moreover, water as a factor greatly affects a structure because it can penetrate in the material and cause it to crack. If the material is steel, its exposure to water will cause it to rust and the rust can spread and also affect other materials.            Another factor to be considered is moisture that can be caused by rain, condensation, leakage from pipes or drains and rising damp. For the underwater structures and especially for those in salty waters (i.e. sea) more problems arise because salt can accelerate the phases of corrosion, and due to that, extra care has to be provided in choosing the materials. Wind also has to be considered. In some areas, winds can prove to be very strong. And strong wind coupled with the effects of some other factors can cause extreme deterioration also because it can bring dust and dirt, which can penetrate materials causing discolouration and corrosion.            Finally, pollution is another factor that contributes to the environmental corrosion of a structure. As we know, atmospheric pollution can be transferred to the ground in the form of acid rain. This acid rain can react with the materials that were used for the structure and can cause its rapid deterioration. Regular cleaning of the structure would be helpful in preventing any unwanted deterioration. Stress factor Stress connects and interacts mostly with the environmental and the temperature factors. Changes in temperature followed by expansion and contraction causes cracks on structure which can result in structure failure in a worst case scenario. In some situations, the structure fails without showing external deformation making it hard to avoid. Even though cracks cannot be seen by the human eye, there are multiple cracks attacking the materials under the surfaces of a structure. These cracks in microstructures can form intergranular or transgranular morphology. These kinds of cracks can cause a big problem because they are difficult to detect. The photo on the right is shows an intergranular SCC (Stress Corrosion Cracking) following the grain boundaries. Problems like this can cause an unpredictable failure of the structure resulting in loss of materials. Temperature factor Changes in local temperature can affect the stability of a structure in a major way because of the expansion and contraction that the structure is being exposed to. Usually materials tend to contract during low temperatures and expand during high temperatures which can cause small but dangerous cracks that can further lead to the failure of the structure. In order to prevent such a disaster from happening, the most common recourse is to select proper materials that can adapt to the environment where the structure will be erected. The temperature factor, of course, depends on the environment factor and the stress factor that we talked about earlier in the report. Time factor Time in corrosion is a very big issue. Time is the factor that produces all the problems and is the one that makes all the others affect the structure. Without time, corrosion would not happen. Of course, time is not the only factor that causes corrosion as we have already discussed. The ones that have a clear connection with the time factor is the environment, temperature and stress factor.            From all that were mentioned, one final but very important factor must be taken into consideration. Corrosion does not have the same effects on all materials; different type of material will have a different kind of reaction with the various factors. Types of Corrosion Affecting Structures First of all, let us consider that we have a reinforced concrete structure. The mild steel that is used for this structure to reinforce the concrete creates a layer on its surface in order to keep it in a passive state. This layer is caused by the alkalinity of the concrete. Therefore, the corrosion that will affect the structure will be caused by the steel that is reinforcing the concrete, and there are three types of such based on the steel corrosion. These are Chloride Contamination, the Patch Accelerated Corrosion and Carbonation. Chloride Contamination The presence of chloride ions in the atmosphere, which are formed usually where structures are exposed to de-icing salts (used to maintain safe transportation during winter time) or to a marine environment, can cause the destruction of the protective oxide layer of the reinforcing steel and lead to its corrosion. Patch Accelerated Corrosion This type of corrosion is either known to the public as the â€Å"Ring Anode Corrosion†or the â€Å"Halo Effect†. This phenomenon is often detected on concrete restoration projects where there is presence of concrete spalling on previous patch repairs. It is most commonly found on the exterior of the structure and is caused by its exposure to freeze and thaw cycles. Carbonation This process is very similar to Chloride Contamination. A state called carbonation, it is caused by the reaction of carbon dioxide within calcium hydroxide in the presence of water. It can cause the loss of alkalinity in concrete. This loss of alkalinity that happens to the surrounding concrete of the steel can cause the destruction of the oxide layer that is protecting the reinforcing steel. This kind of corrosion is a big threat to old buildings. Areas where Corrosion Applies Corrosion can be found in different kinds of structures. One of them is the bridges where there can be corrosion on the reinforced concrete caused by the presence of de-icing salts or by their exposure to marine environments. Parking garages are also exposed to corrosion, and this can be caused again by the presence of de-icing salts transferred there by the parked cars. Of course, buildings are exposed to corrosion too, and it most likely applies on spandrel beams, columns and balconies. The types of corrosion usually found on these structures are the types of corrosion that were discussed earlier, namely, chloride contamination and carbonation, which can also be caused by exposure to sea spay usually to buildings close to the sea, and also through contact with atmospheric carbon dioxide. Another area where corrosion can be applied are the marine structures, like concrete piers and wharfs since they are exposed to chloride contaminated salt water and airborne chlorides along with high temperatures and high humidity. Deterioration of Concrete in General Concrete, like other materials deteriorate due to internal and external forces causing concrete failure. Other causes are water infiltration, carbonation, corrosion of reinforcing steel, shrinkage, drying, thermal contraction and poor placement practices. From that, water can cause a big problem to concrete since it can penetrate and freeze during low temperatures. This can apply extreme pressure to concrete and make it weak and finally cause it to fail. Also, water carries chemicals like acids, sulphates or chlorides that can attack concrete and corrode the reinforcing steel inside it and expand the corrosion from inside to outside. Another cause is carbonation, where water from rain can be combined with carbon dioxide in air and after some time infiltrate concrete and react with the calcium hydroxide and create calcium carbonate which can decrease the concretes pH level and attack the surrounding layer of the reinforced steel. This can cause corrosion of the steel since it is no longer protected and this as we said before can affect concrete as well because of the presence of moisture. Deterioration of Structures and Service Life The deterioration of structures is a process that comes in stages and from that, we can point out the starting stages of the actual corrosion which is the concrete cracking and the excessive deflection. This can result in a reinforced concrete failure due to loss of structural strength. Service Life of a Structure Each structure has its own service life. This service life is said to be the time period that when ended will need human intervention such as conducting repairs, strengthening, maintenance or rehabilitation. By knowing the service life of a structure, we can determine the time when such actions will be required. The service life of a structure is separated into four stages. The first of the four phases is the time period from completion of building the structure to its corrosion initiation. The second phase starts after the corrosion initiation and until corrosion induced cracking. In the third phase, we have the time period from the concrete cracking up to the excessive deflection of the reinforced concrete members. As a fourth and final phase, it is the time from the loss of serviceability to the final collapse of the structure, which means that the structure arrived to a point where it had lost its flexural and shear strength. By determining the corrosion stage of the structure, its service life can be made known and as result, the phase in which the structure is currently experiencing at the moment can be identified. Furthermore, the time period of each of the four phases of the service life of a structure can be determined once a performance-based assessment criterion is established. The period of each phase can be calculated with the help of the following formula:            S (t) = Structural Response (Load Effect)            L (t) = Acceptable Limit for Structural Response (Structural Resistance) By knowing the time periods of each of the four phases of the service life of a structure, a probable failure can be determined by using the following formula:            pf (t) = Probability of an event Deterioration Stages of a Structure            Let us go back through to the stages of deterioration of a structure and discuss it. First we have the concrete cracking which comes at the end of the second phase of the service life of a structure and is after the initiation of reinforcement corrosion. So, after the initiation of corrosion, some rust is produced on the reinforcement. That covers more space than the initiation and as a result, some pressure propagates on the surrounding concrete which by itself cannot take the pressure since it exceeds its tensile capacity and starts cracking.        Furthermore, after the concrete cracking and at the end of phase three of the service life of a structure, the excessive deflection comes which is restrained within an acceptable limit. After the end of the fourth phase, we have the loss of strength of the structure which can lead to a structure failure. In that stage the corrosion on the reinforcement reduces the strength of the RC structure and results to a break at the critical cross section of a structural member. Deterioration of Strength There are two different ways of determining the strength deterioration of an RC structure, namely, the destructive load test and the non-destructive measurement of corrosion current density. Both of those methods can be used in the laboratory in order to measure the strength deterioration of a structure, but in practice and on the field, it can only be measured based on the reduction of the cross sectional area of the reinforcement bars. Deterioration of Stiffness Finding the stiffness deterioration of RC structural members is very important for the deterioration of the structure as a whole system where the load redistribution and the failure mode both depend on the stiffness of its members. Rate of Deterioration The rate of strength and stiffness deterioration is different since the stiffness is deteriorating much more severely than the strength. This is based on the fact that stiffness is measuring mechanical properties related to geometry and the cross sections of a structure way more than strength does. Factors that are related to corrosion and can affect the geometry of a structure are concrete cracking, delamination and debonding. After all those factors, and once the corrosion actively propagates, it results to a severe increase of deflection. Then again, deterioration of strength is not that affected from those factors which can only damage tensile sections of RC members.
Thursday, September 5, 2019
Social Influences on the Individual
Social Influences on the Individual Explaining social influences on an individual, using sociological theories Albi is a 7 year old boy whom gradually developed genetic abnormality of deafness. When Albi could not hear completely, his behaviour have changed dramatically and doesnt want to interact with other childrens anymore. Albis family arent the riches, they could just afford their needs however it didnt affect Albi as much. The love he receives from his family was enough. In Ians note, structural theory suggest we are influenced in our behaviour and actions by society and adopt a macro approach. The macro level have an impact on the way Albi is treated by classmates or even when he is out for dinner with his family. Staff doesnt put in the effort to communicate with Albi and tends to ignore him which makes him feel like he does not exist. This have led to the conflict theory. Parents teaches their childrens of the norms however they can pick up bad habits while they are in school. He is being bullied because of his condition and he is isolated from other childrens as they see this as unn atural and abnormal. The troubling of it is that Albi is constantly in a fight which his parents are very worried. Due to the conflict between Albi and his classmates he feels unwanted and would rather stay at home. He has distanced himself from his friends which caused him not having any friends anymore. Another structural theory that is link to Albis change of behaviour is the symbolic theory. Childrens misuse of words such as deaf can you hear me or you cant hear, you must be stupid affects Albi emotionally, which he feels down and worthless. In Albis case this is very hard for him to cope as he is only a child, he wouldnt be able to understand the situation and his actions is uncontrollable. This can be difficult for his parents to manage as he might become disobedient. This can have an effect on him when he grows up, he will repeat these phrases to himself and can have a negative result later on his life. Once Albi starts attending the community centre for the deaf his private troubles will eventually improve. Everything will be new his life style will change and he will have to adjust, it may take a while for him to progress however he will get there in the end with the right kind of support from his loved ones. As human beings we strives to seek for new motivation therefor this will help him. Albi should be able to cope and learn quickly as his parents will be there to support him all the way through. He will meet new people who has the same condition as him which will have a positive effect on him emotionally and make him realise that he is not alone in this battle. This will also help him to realise that being different from other childrens is ok. He will feel sense of belonging and understanding of his situation. He will feel wanted as he is in the same group of people and also because he will be part of the group activities or playing with someone without getting judge d. He will be trying to improve himself to fit back in with society with the support of staff, family and his new friends. This can improve the way he thinks of the world and his future. He is more likely to proceed in education which will have a good impact later on in his life. Albi is more likely to succeed in life and will be determined to success. The possibility of Albi not letting his condition get in the way of success is very high with the help from people who is important to him and the acceptance from others that he will receive as he grows older. To improve Albis life chances, the media could increase the advertisement about deafness. Making it clear to everyone that their situation is difficult and by saying or doing negative stuff towards them wont make things better. Perhaps making up a cartoon series about someone being deaf and treating them in the right manners could help children understand better. Making them feel that they belong with society can prevent horrible things that they can possible do to themselves. The schools can also help by teaching childrens that not everyone is born perfect and that they should still accept them for who they are. Schools can do group activities where they will get to experience how difficult it is not being able to hear so they will be able to understand and will unlikely treat their classmates in a disrespectful manner. Teachers can help by teaching the students to treat others the way they would like to be treated. In college we can create a power point all about deafness and how i t is important to respect them and that they should be treated the same. I could then present my presentation to different schools so they can have a better understanding of what deaf people have to go through each day as this can have a bad impact on themselves. For some they would like to end their life as people feeds them with negativity which does not help as they are already struggling and we are making no effort on how we could help rather us focus on how we can make them feel horrible about their self instead.
Wednesday, September 4, 2019
Development Of Port Services In Sri Lanka Tourism Essay
Development Of Port Services In Sri Lanka Tourism Essay 1. In the world today, all countries are inter connected in more than many ways. of all these connections, transport service are considered to be the most important and unavoidable connection. this transport service may be either human or cargo transport. Today to day there are many ways and methods of transport. Although most of these modern systems are quick and easy .the most ancient sea transport system is still the reliable and the profitable way of transport. Sri Lanka is rich with strategically located natural ports that are === by many other nations. These ports have the potential to be the best ports in the Indian ocean. they should be developed to an international expected standard with modern facilities and features. before embarking on the development of these ports , an in depth study of a few internationally famous ports should be made. If handle methodically and properly, Sri Lanka ports could be the best in South Asia and also be the province economic recourse of the country. This paper is an attempt to analyze and consider the measures that have to be adopted by the authorities in order to develop national ports to maintain highly efficient and productive ports as transshipment centers with adequate capacity equipped with most modern technology and facilities. At present several measures have been taken towards this goal, there is more that could be done to obtain making use of the existing resources. AIM 3. The aim of this service paper is to propose and suggest ways and means of developing Sir Lanka as the leading maritime and aviation center in the South Asian Region. that can complete with the most competitive and user friendly ports in providing high quality port, shipping and aviation service. BACKGROUND 4. For thousands of years, the highly strategic location of the ports of Sri Lanka has lured many a merchant. This is a location that connects Middle East with the Far East, with links to the Australian and African continents and it is the gateway to South Asia. From the past up to date many ships that use the international sea communication route are using Sri Lankan port services due to various reasons such as easy access, quality of the service, cheap labor etc. Therefore Sri Lanka should take maximum advantage of seaports to promote international trade by getting commercial and industrial activities which directly assist the economic progress of the country. The other countries of the region are developping their ports to gain economic benefits out of this sea transportation system. To face this competitive market we need to gear our sources to get the necessary attraction of the world. 5. On the other hand, today Sri Lanka with its far-reaching economic changes and policies has improved infrastructural facilities, tax incentive, opportunities for investment of capital for new industries, and above all the guarantee of the safety of capital invested and presents a favorable environment for foreign investment capital. This transformation of the economy has resulted in the increased industrial and trading activities in Sri Lanka. So this present trade development has influenced the need of development in the port and shipping sector in the country. 6. Sri Lanka Port Authority has the responsibility with the mission to increase our customer base profitability by providing excellent an service and world class facilities. PORTS AND ON GOING PORT DEVELOPMENT PROJECTS 7. As an island Sri Lanka is privilege to have natural harbors all around the country. But the country was not able to use a few numbers of ports due to various reasons such as war, lack of infrastructure facilities, investment capacity etc. At present with the high economic growth and the end of the armed conflict in may 2009 provides a firm base for all development activities. Port services which were growing significantly in the year 2010.The present ports and development projects are as follows: a. Port of Colombo. It is the main port in Sri Lanka. Located on the southeast side of the island and it is facilities include two terminals, Jaya Container Terminal (JCT) and Queen Elizabeth Quay (QEQ).From 1987 to 1997 due to the commitment , it has done so many development to control the container traffic. For example in mid 1990s it increased from less than 500,000 Twenty foot Equivalent Units (TUEs) over 1.5 million Twenty foot Equivalent Units. But it was not sufficient in 2003 and 2004 around 40% of west to east traffic was being diverted from Colombo port to more competitive ports out side Sri Lanka. Then Sri Lankan governments desire to create public-private partnership in 1999 to improve expands, operate and manage Queen Elizabeth Quay (QEQ) with South Asia Gateway Terminals (private) limited. To day under mentioned projects are going on: (1) Colombo South Harbour development Project. In ocean of about 1000 hectares on the South West of the percent breakwater this proposed harbour will be located. It will have four terminals , 1200 meters each capable of accommodating deeper draft vessels in the future. The development is expected to be done in two stages. The first stage to intfastructure with pulic funds and the second stage for terminal facilities with private sector participation. This project will promote the following Sri Lanka: Facilitate economic growth. Increase competitiveness in international trade. Lower transport cost and faster delivering times. Container handling capacity wills increase. (2). Jaya Container Terminal for the Enhancement of Capacity. Detail design of the extension of the Jaya Container Terminal has been completed. this will enhance the capacity of port of Colombo to accommodate the mega container carriers now and in the future. This also expected to berth two 8000 Twenty foot Equivalent Units container ships at the same time. (3). New Terminal Management System. This system will be implemented with the Sri Lanka port Authority (SLPA). It will replace the present obsolete computer system of the Jaya Container Terminal with modern computer system providing Networking, Radio data and Communication System. b. Galle port. The gall port is located very close to the international sea transport route. It is the very the only Sri Lankan port that provides for pleasure Yachts. All those facilities were destroyed by the Tsunami. It is proposed to develop this port to attract rich tourists and passenger carrier ships. c. Trincomalee Harbour Renovation. Ten times as much as the Colombo, the Trincomalee harbour is considered to be one of the most strategically situated natural harbour in the world. This harbour was tentatively considered to cater for bulk and break bulk cargo transportation. Coming under the new development project the Nagenahira Nawodaya great improvement and vast development is expected to take effect in this famous port. Development of the Hambanthota Port. Hambantota region is considered to be an under develop area both economically and socially. The construction of a sea port in that region will greatly enhance the improvement and the development of that area. the presence of a port in that area will certainly make it an industrial region. Unlike development an also functioning port, this newly constructed port can be streamlined to serve it expected goal. It has to be properly planned and executed. It is to be a commercial harbour will definitely of a more convenient and cost effective access to and from the Southeast region for goods and cargo from the West coast. It will also reduce the congestion in the Colombo harbour. Development of Port in Oluvil. In the process of developing the Eastern Region under the Nagenahira Nawodaya programme it has been decided to build a port at Oluvil. If so constructed it will be the Southern link in the developing chain of coastal harbours. This harbour will be another commercial harbour and basin for fishing crafts. Port of kankasanthurai and point pedro. This is one of the most Tsunami devastated ports in Sri Lanka. It needed urgent rehabilitation and improvement. This improvement includes the repair of the breakwaters, roads and pears. Wrecked and dredging have to be removed from the harbour basin. The Sri Lanka port Authority has carried out urgent and temporary repair to enable it to function without our interruption. The government of India has aided for the removal wracks and for the construction of a new pear. Very vital sections of the harbour are beyond use. The Sri Lanka port Authority while renovating the harbour, have decided to study the feasibility of developing Point Pedro in to a Sri Lanka port Authority regional port. COOPERATIVE VALUES OF SRI LANKA PORT DEVELOPMENT AUTORITY The SLPA is one of the major contributors to the economy of Sri lanka. As a key revenue earning and service providing agency, the role of SLPA is directly to the excellence of its delivery service. In this regard the value system of the authority is the basis for the success of its operational relationship with the stakeholders. These values could be categorized under the following. Dependability Timeliness Accuracy Accountability for Achievement Team Spirit Commitment Reward Recognition Performance with integrity It will be the responsibility of the chairman / chief Executive Officer, The managing Director and Other Senior management staff to inculcate the above values at all levels of the Authority. Hambantota is planned to undertake initially general cargo such as cement, steel, fertilizer, timber, bunkering services, port related industries, coal, RO-RO facilities, off shore services such as ship Chandling, supply of water fuel, crew changes, ship building and ship repair facilities etc. Contract for the construction of phase 1 was awarded to Chinese Joint venture Construction Company at the total cost of US$ 360m and the port will be operational in year 2010 SERVICES RENDERED BY OUR PORTS TODAY 8. Sri Lanka has a number of commercial ports and a National Shipping Fleet to provide services for the Maritime Transport Industry. The governments also encourage and develop multi country consolidation and entrpot trade on a large scale. a. Container Operations. Development of JCT and QEQ facilities enhance the productivity in container handling and off dock facilities such as inland container depots to ease the congestion within the ports. b. Ancillary Services. Ancillary services including ship building, ship repair, ship chandelling, salvage and towage, bunkering services, ship chandelling and off shore supplies, cruise shipping marinas and ship management are available. c. Tariff Concessions. Tariff concessions including lowest Transshipment rates in the region, restoring Transshipment rates irrespective of the mode, attractive rebates of up to 20% of the stevedorage, free storage (of 21 days) for transshipment etc. d. multi country consolidations and enterpot cargo. A separate warehouse has been provided specially for this purpose at the port access road. Special tariff concessions have been given to this multi country consolidation operation that use warehouse within the port. e. Information systems. Computerized systems for planning and control of container handling operations, data interchange between the shipping agents, inquiries available from the personal computers and port users and one stop documentation centre. f. transportation systems. Coordinated port facilities with inland transport and distribution systems in terms of control the ship traffic. g. infrastructure facilities. Connecting road, rail, and barge facilities. I. Other services. Handling of dry and liquid cargo, bulk and break bulk cargo, car carriages and passenger liners. J. port security. Sri Lanka ports authority complies with the relevant requirements of the international ship and port facility security code, contributing to the enhancement of maritime safety and security. MANAGEMENT OF PORT DEVELOPMENT . 9. To gain the status of regional mega hub port in the south Asian region sri lanka will have to compete with Singapore, Port Kelang, dubai and Aden.in this attempt we will be forced to use all possible resources. Therefore following are the salient points which required when developing port service in Sri Lanka: When developing ports according to the national plan. A comprehensive study should be need of each individual port. These should be combination of medium term and long term planning. While the existing ports are improved by the introduction of modern facilities. The recourses should be constructed according to the international standards. Complete and viable is that which includes all necessary facilities such as transshipping, cargo shipping, fire fighting and rescue service and the like. Planning of new ports should leave space in their for any future improvements. Any future development of existing ports should have the possibility of absorbing any new introduction. The organizational structure of any new port should be flexible enough to adapt to business environment changes. The planning section of management service department should be responsible for the following task: Traffic trend and performance statistics. Forecasting of future traffic shipping and cargo. The evaluation of new trends in ships and cargo handling. The analysis of requirements, water , load equipments and storage. The preparations plan for the future. Preparation of future traffic demands. Forecasting of traffic is an art which need a lot of understanding and experience. This may require the assistance of out side agents, but yet these reports should be checked mathematically and tactically before implementation. In arriving at this dicisions they should have considered the following targets: National economic targets. Have past trends clearly explained and the need for continuation of these trends be questioned. Have the port records being studied well. Will the change of each industry have any effect of the future traffic? The building of new ports. SUMMARY 16. In the two years following the end of a brutal war, Sri Lankas economic growth is projected to exceed six percent, according to the World Banks first annual assessment of regional economies. The interim period requires improvements to existing facilities to bridge the gap between growing demand and shortfalls in facilities, so as to ensure that customers are not lost to competing rival ports. Such losses would have disasters impact on the future of the Ports in Sri Lanka. So it is very vital to initiate actions for renew and expand existing ports in the aspect of Developing Sri Lankan ports as the leading Maritime and Aviation center in the South Asian Region with the most competitive and user friendly ports and airports to provide high quality ports, shipping and aviation services. But it should within the broad national strategy; the development of each individual port must be comprehensively planned. The development of a port consists of a combination of medium-term and long-term planning of new facilities plus-in the case of existing ports-a programme of short-term action to improve the management With New technologies, which can spur changes and will improve the operations. For example, the development of a container terminal can be accompanied by the introduction of modern data-processing methods to improve the quality of the information necessary for managers to control the flow of containers. RECCOMANDATIONS Developing Sri Lankan ports as the leading Maritime centers in the South Asian Region with the most competitive and user friendly ports, following policy decisions has to follow when projecting new ports or expansion of existing ports To consolidate the position of the Colombo Port as an International hub port for container operations and as a logistics center in the South Asian region. To develop a competitive marketing strategy in order to establish the port of Colombo as an International hub-port. c. To develop the port of Galle as a regional port as well as an alternate commercial cargo handling port to the port of Colombo and to develop this port to attract rich tourists and passenger carrier ships. To develop Trincomalee port as an ecologically sensitive, leisure and light commercial port. To develop the port in Kankasanturai, Oluvil and point-pedro as regional commercial ports. To build and establish the Hambantota port initially as a service providing industrial port, and in the long term develop it to be a commercial port for more convenient and cost effective access to and from the Southeast region for goods and cargo from the West coast. Then it will also reduce the congestion in the Colombo harbour. To maintain a high level of productivity and service excellence by enhancing knowledge, skills and creativity and inculcating positive attitudes to all port employees, through systematic Human Resource Development programmers. To develop a strategic development plan for all sea port of Sri lanka.
Tuesday, September 3, 2019
Deer Hunting is Necessary :: essays research papers
     It is a freezing twenty-two degrees outside. Even though it is still too dark to see, as you look over the hills, you see a breathtaking sunrise that will soon creep through the heavy fog. Every breath that you take is like smoke coming out of a dragon’s nostrils. As you are waiting patiently, still, and quietly, you finally see your kill, the white-tail deer. Without a doubt, the white-tail deer should be hunted.      First, the population of the white-tail deer is entirely too big. In fact, there is a total of twenty-five million white-tail deer in the United States alone.1 Because of this enormous number of deer, they are constantly on the move. This means that they go straight to the roads. Ten thousand white-tail deer get hit by cars and die each year while they try to find new eating grounds.2 Not only is this wasting meat, but it causes severe damage to cars. Deer can even cause car accidents on the highway, killing humans as well. Also, deer are constantly getting pushed into the city because of little food due to the over-populated area of deer. Unfortunately, this causes a hassle in major cities when people try to catch the deer without harming it. Debra Fluitt, a citizen of Tulsa, Oklahoma, said, â€Å"Last year a big white-tail deer came into my very own house as I was unloading groceries. When the police tried to get it out, it destroyed over $800 worth of my belon gings and finally jumped through the window.†After the deer are captured in the city, they are taken back into an environment where food is scarce because of the over-populated deer that are already there. That deer then dies of starvation.      Furthermore, the white-tail deer is destroying the environment day by day. They eat crops that humans need for survival. They eat all of the food in their area, so they have to come to our crops. In fact, several years ago, authorities passed the Buck Law, which was meant to stop hunting so many deer. Thanks to such strongly restricted laws, deer populations expanded rapidly but ended by causing serious damage to crops. The Buck Law was soon useless.3 A group of farmers in North Texas stated, â€Å"Each year, we lose more and more money because of those stupid white-tail deer. We can’t keep them away from our crops.
Monday, September 2, 2019
Free Essays on Homers Odyssey:Discussion of the Final Volume, Book XXIV :: Odyssey essays
The Odyssey: A Discussion of the Final Volume, Book XXIV Homer’s epic, The Odyssey is the classic story of the homecoming of the warrior and king Odysseus. It is one of the most enduring pieces of literature known to man. The lessons and tales from the epic are unforgettable. However, there are several difficulties that the contemporary reader has with The Odyssey. These include issues such as difficult language, tangential stories, and the verse style it was written in. However, the focus of this paper is the final volume of the epic. This volume, Book XXIV, is usually noted as rather anticlimactic. Many believe that it is simply an epilogue (having the epic really ends in Book XXII when Odysseus killed the suitors.) Some scholars believe that the final book is not even Homeric. This essay shall discuss why Book XXIV is a good conclusion and how it relates to the rest of the story, which would provide a case for it being Homeric. In Book XXIV, entitled "Warriors, Farewell," Homer does not seem to want to have a grand ending, but rather neatly wrap up all of the loose ends. There are three major parts to this book, they include: the voyage of the suitors’ shades to Hades and dialogue between Agamemnon and Amphimedon; the story of Odysseus and Telemakhos visiting Odysseus’ father, Laertes; and the start of tje feud between the families of the suitors and the house of Odysseus and Laertes (which could have torn the country of Ithaca apart) which was stopped by the Zeus and Athena. Homer starts Book XXIV in Hades as Agamemnon and Akhilleus greet the shades of the suitors that Odysseus killed in Book XXII. One of the shades tells Agamemnon of how Penelope was faithful and how Odysseus returned to take his revenge. Agamemnon, who upon his homecoming after the Trojan war was killed by his adulterous wife, was surprised by this tale. This is perfectly consistent with the earlier depiction of Agamemnon in Hades (Book XI) in which he tells Odysseus to beware of Penelope for she may have been unfaithful. This meeting between Agamemnon and the shades of the suitors makes sense since the story of Agamemnon was one often referred to during the epic. This sort of finishes off the Agamemnon story. The introduction of the suitors’ shades also serves to yet again reinforce the theme of hospitality.
How did Eratoshenes Measured the Circumference of the Earth? Essay
About a matter of two hundred decades ago, Greek astronomers valued the erudition that the shape of the Earth is correspondingly a sphere. And as the moon passes through the shadow of the earth, or that which is called a lunar eclipse, the Greeks have observed the circular shadow casted by the Earth. Since that time, it was already an established intellect that only spherical objects cast a circular shadow, thus, the conclusion that the Earth is likewise spherical in shape. The mere conclusion of the Earth’s shape, nevertheless, did not achieve contentment to the Greeks. A Greek astronomer by the name Eratoshenes discovered a possible way in measuring the Earth’s circumference. It started when he had heard some reports from one of Egypt’s city, Syene, which was located on the equator of the earth. The reports have informed Eratosthenes that the sun shows vertical wells down on Syene during the first day of summer. However, the astronomer did not observe any similar phenomenon anywhere by his home; therefore he arrived at the supposition that in his home, Alexandria, which lies 7 degrees north of the city of Syene, the sun never does reach zenith. Eratoshenes further presupposed that the sun is in line with the potential measurement of about 7 degrees south of his residency’s zenith during summer solstice or the first day of summer. Provided such conclusion, the distance from Alexandria and Syene was believed to be 7/360 or 1/150 that of the circumference of the Earth ( a complete circle has a 360 degree measure). Additionally, way back Eratoshenes’ time, â€Å"stade†was the known standard unit of measurement, which then is equal to 1/6 of a kilometer. Consequently, there are 5,000 stades from Syene to Alexandria and from such logic, the Earth’s circumference was calculated to be: 50 x 25,000 stades = 42,000 kilometers. Accordingly, the accepted modern value of the Earth’s circumference is 40,000 km, hence Eratosthenes was correct. References â€Å"The Earth and Moon, Size of the Earth cont. †Publication retrieved on 10 Sept 2007 from http://inkido. indiana. edu/a100/earthmoon7. html
Sunday, September 1, 2019
Origins of the Cold War Essay
A. Sources of American Soviet Tension Had difference in view of post war world. US supported the view in which nations gave up traditional military alliances, and dealt with each other in a democratic process, with an international org. as mediator. Britain and Soviets favored view where system of traditional European balance of powers would reemerge. B. War time Diplomacy By Jan 1943 a strain in relations with soviets was evident as Stalin refused to meet with Churchill and Roosevelt. The 2 refused Stalins’most immediate demand to have a 2 european fronts, but assured him that they would have unconditional surrender of Axis powers and they would not leave soviets out of peace negotiations. In Teharan Conference relations between Stalin and Roosevelt became better as Stalin agreed to enter Pacific once hotstilities in Europe died down, and US agreed to 2 front western war. However there was tension on who would lead Poland once war was over. They avoided the issue by leaving it unresolved. C. Yalta In Feb. 1945the big three met in Soviet Union. Stalin was promised some territory lost in Jap Soviet war of 1904, in pacific. Also agreed to UN charter with a security council, with members from 5 major powers. Issue of Polish government was compromised. Soviets had occupied Poland and installed the pro communist Lubin Poles, but also agreed to let in some democratic London Poles into government. The future of Germany was also unresolved. They agreed that after war each troop would control the part of the country they were in and reunification would occur at a later time. US wanted Germany to be reconstructed, and reunited, Stalin wanted heavy reparations. The Yalta conference sidestepped important issues, and made the three men feel like they signed an important document. Weeks after signing Roosevlt watched as Stalin installed procommunist governments in several nations and refused to make the changes he promised to Roosevelt in Polish government. Roosevelt was adamant that Soviets were flexible, but would suffer stroke and die in April 1945. II. The Collapse of the Peace A. The Failure of Potsdam A few days after taking office Truman, much less patient with Soviets chastised foreign minister for violations of Yalta conference. However he had little leverage as soviets controlled central and eastern Europe and US was still in pacific war. Truman insisted on getting 85% of what he wanted but had to settle for much less. Truman conceded Poland and recognized the noncommunist forces in the Warsaw government. To settle issue of Germany Truman met with Stalin and Churchill in Postdam, he accepted the adjustments to the Polish German boarder and but refused Russians to claim reparations from parts of Germany controlled by US French or Britain. This stance made it clear that Germany would remain divided. The western zone friendly to US, the Eastern to Russia. B. The China Problem For US hopes of a peaceful world to come true, China had to be strong and independent, however the Chinese government under Chaing Kai Shek was feeble and incompetent. Chiang had isolated himself, unwilling to face the problem which were facing him. He was in prolonged rivalry with armies of Mao Zedong, which was in control of 1/4 the population. US would pump arms and money to the Chiang. Instead, US now looked to Japan as an alternative pro western force in Asia. US lifted all restrictions, promoting indusrial development, and economic growth. C. Containment Doctrine By 19445 the Grand Alliance was over, and US was now working on a new containment policy. Rather than creating an open world, they would work to contain the expansion of the Soviets. Truman issued his Truman Doctrine based on ideas of diplomat George f. Kennan. United States would help nations resisting sibjugation from outside sources or from armed minorities. He also asked for $400 million to help turkey and Greece, which would help them defeat communist insurgents, and established basis for US foreign policy for next 30 years. D. Marshal Plan American policy maker wanted to do something to strengthen pro American governments in Europe before communists insurgents destroyed them. In June 1947 Sec of State George C. Marshall proposed plan for economic assistance to all European nations even Soviets to join program of recovery. Soviets denied, but 16 other nations joined. Over three years, $12 billion would be given to help spark economic revival. European industry rose 64% and caused communist strength to decline and US trade opportunities to increase. E. Mobilization at Home Failed agreements with Soviets over international control of nuclear weapons, made America redouble its atomic research. The Atomic Energy Commison was to oversee all nuclear research civilian, and military, and in 1950 Truman aoorived development of ne H bomb stronger than one used in 1945. The National Security Act created a new Departmen of Defense which would oversee all armed services. A National Security Council out of thw white house would govern forign and military policy. CIA would replace wartime office of strategic services. And engage in covert methods of collecting onformation. F. The Road to Nato Truman reached an agreement with Britain and France to merge their Germany zones into a new western German Republic. Stalin responded by imposing a tight blockade of western berlin, Truman would drop supplied of food and fuel for ten months allowing a city of 2 million to survive during this time. Stalin would lift the blockade in spring of 1949. Germany was now divided into 2 nations, Federal Republic in west and Democratic Republic in east. In April 1949 12 nations signed agreement declaring an attack on one was an attack on all. Soviet would do the same with other communist nations in Europe called the Warsaw Pact in 1955. G. Reevaluating Cold War Policy A series of events at end of 1949 propelled cold war in new direction as Soviets announced that they had tested their first atomic bomb, and the Chiang Kai-Shek nationalist government collapsed and was replaced by a communist extension of Soviets. Us would refuse to recoginize Chinese government and diverted attention to revitalizing Japan as a buffer against Asian communism. During this escalated atmosphere of crisis Truman called for a through review of forign policy. The National Securty Report was issued in 1950. The doc said US should not rely on other nations to resist communism, US must stop expansion of communism in the world. It also called for 4x increase in US military budget. III. America After The War A. The Problems of Reconversion Economic growth continued after 1945, saving from consumers during the war started a boom, as did a $6 billion tax cut. The GI bill of rights, or Servicemen’s Readjustment Act provided houseing, education and job training to vets and increased their spending. Serious inflation cause prices to rise 15 % annually, compounding this was labor unrest as major strikes were occurring in most industries. In 1946 John Lewis led the United Coal Workers out on strike for 40 days. Truman demanded coal mine owners to agree to union demands, simulataneously the nation’s railroads shut down, however Truman threatened military intervention and the strike was over in a few days. Reconversion was difficult for women and minorities who entered during wartime. Now men where returning from war and wanted their old industrial jobs back, many women voluntarily gave them back but as much as 80% and all minority men wanted to keep jobs. Women would look to other areas of the economy, mainly the service sector. B. The Fair Deal Rejected The Fair deal was a 21 point domestic program calling for expansion of social security benefits, legal minimum wage increase from 40 to 65 cents†¦ public works†¦ and other programs. In all he wanted to declare an end to wartime moratorium on liberal reform. However the Republicans would regain control of house and senate and reduce government spending and many other reforms. The Taft Hawley Act would empower president to call a 10 day cooling period before a strike. Truman would veto it but congress overruled. C. The Elections of 1948 Despites results of the 46†² election Truman was not ready to give up on new deal. In 1948 he proposed major civil rights bill but congress would defeat them all. Tuman was trying to build campaign issues. Truman had issue of unpopularity and weakening support in the democratic party. Souther democrats did not like the civil rights bills. Others did not like the way he dealt with Soviets. Republican had nominated Dewey, seemed to offer unbeatable alternative to Truman. Truman called republicans do nothing – good for nothing. To dramatize this he called special session of congress, mostly republican, they met for 2 weeks in which nothing was accomplished. Truman would win by a very slim but decisive margin. D. The Fair Deal Revived The new congress was still hesitant to fair deal but did give some of what Truman wanted. They increased min wage to 75 cents and hour, extended social security to 10 million more people, and National Housing Act built 810,000 homes for low income housing. However his efforts for civil rights, the abolishment of lynchings, poll tax, fair employment all failed. Truman did battle descrimination on his own, he ended descrimination in government jobs, and tried to dismantle it in armed forces. Allowed justice dept. to get involved in discrinitory statues. IV. The Korean War A. The Divided Peninsula At the end of WWII US and soviets had troops in Korea, Russians in left a communist government with strong soviet troops, while us left an anti communist with a small military. The weakness of South Korea made north want to reunite the country. Truman reacted quickly to the invasion by sending limited American military assistance. Soviets protetested the UN Security Council for it refusal in acknowledging the Chinese government. This gave UN agreement to US for international assistance to South Korea. Truman would sed ground forces and General McArthur to command UN operations. Most UN troops were American. After driving communists out of south, Truman gave McArthur permission to go into North to make a uunified independent democratic Korea. B. From invasion to Stalemate The invasion went smoothly with the capture of Pyongyang in October. But Chinese government got weary as UN moved close to Chinese boarder, they would enter war and push Americans back past 38th parallel and take capital of Seoul. By Jan UN started moving back north and regained capital for 2nd time, then war went into stalemate. Truman did not want direct conflict with China which he thought would cause another world war. McArthur thought that it was a just that, a war with China, he thought heavy bombing on communists was necessary. McArthur would write letter to republican leader which caused Truman to relive him of command. 69% of Americans supported McArthur and was welcomed enthusiastically. There was hostility towards Truman until other military leader publicly showed support for his decision. Stalemate continued in Korea, negotiations began in 1951 but war would drag on until 1953. C. Limited Mobilization To fight inflation during wartime Truman set up the Office of Defense Mobilization. When its actions failed Truman took more drastic actions. When rail workers walked off the job he ordered government to take control. In steel strike he did same but supreme court ruled he had exceeded his power. The war brought economic boom as government pumped money into the economy. But made many Americans insecure, and anxious about communism. Did not know why boarder skirmish had gone on so long unresolved and 140,000 dead wounded. Led to second campaign against communism. V. The Crusade Against Subversion A. HAUC and Alger Hiss Republicans wanted something to attack Democrats with and and democrats wanted to take issue away from the,. The House Un-American Activities Committee in 1947, started publicized investigations of communist subversion. They started arguing that communists had infiltrated Hollywood, and when may former communists film maker refused to talk about their politicial beliefs, they were sent to jail for contempt. Another public investigation was against high ranking senate member Alger Hiss, when reports from a former communist agent said that Hiss had passed classified documents to him. Hiss sued for slander but Chambers produced images of the document. Do to statute of limitation, occurred over 7 years ago, Hiss was not prosecuted but was sent to prison for several years. This public believe that communists infiltration was possible. Nixon protected Hiss and made him well known and helped him win seat in senate. B. The Federal Loyalty Program and the Rosenburg Case To protect against republican attacks, Truman initiated a widely publicized loyalty review program of many federal employees, causing 2,000 to resign and 212 to be dismissed. This caused other attacks on subversion. Direct of FBI investigated alleged radicals. When Russians successfully detonated atomic bomb there was talk that information had been passed from America. Young british scientists testified he gave information, the trial eventually led to a couble, Rosenburgs, members of communist party. They were sentenced to death and after 2 years of appeals killed in electric chair, they maintained their innocence. All these cases came to grip the nation of subversion. The public was fearful of infiltrated communists and being accused of communism also. Out of this would come public figure of McCarthy. C. McCarthyism In a speech Joseph McCarthy declared that he had a list of 205 communists in the US senate, his statement was so bold, it made him a prominent figure and leader of crusade against subversion. McCarthy then moved to other agencies and was made chairman of special subcommittee on subversion in the government. He never proved conclusive evidence that anyone he accused was really a communist. Republican rallied that democrats had been responsible for 200 years of treason. Few spoke out against him, even Eisenhower who dislike him did not while running for presidency. D. Republican Revival Frustration in Korea, and a bad year in Democratic party caused Truman to drop out of Presidency race. Gov. Adali Stevenson would be nominated instead. Republican nominated Eisenhower, and as his running mate chosen Nixon. Nixon would attack the democrats for being cowardly in their attack against communism. Eisenhower and Nixon would win overwhelmingly, and republican would regain control of both houses. The election ended 20 years of democratic domination, and ended worst turbulence of post war era. VI. Conclusion Even during world war II US and Soviets had different views of what world should be like once war was over. Right after the war this difference in opinion became evident. US thought Stalin was like Hitler in their quest for world domination, Stalin thought US wastrying to protect their world dominance by not allowing Russia to be a world power. The result was high tensions and the Cold War. US would help revitalize the broken Europe by gioving economic aid through Marshall plan and protecting them from communism. At home hysteria of the infiltration of communists into American government was fueled by reports and publicized court cases.
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