Food Safety Requirements Essay Example | Topics and Well Written Essays - 750 words

Food Safety Requirements - Essay Example Organizations used to implement wrong storage practices that would often lead to the food ingredients spoiling while under production but to meet their profit obligations they will go on to introduce the harmful products into the market. Based on statistics from CDC, approximately forty-eight million people fall sick in the United States of America alone from foodborne diseases. Out of the forty-eight million people, one hundred and twenty-eight thousand die annually due to foodborne diseases that are majorly caused by food contamination. With the new rules, FDA can take action before the products are introduced into the market thus saving numerous lives that would have been endangered by harmful food substances. Ideally, the food industry is one of the most delicate sectors that require strict regulation since it directly impacts on the health and well-being of the consumers. Safety was always the driving force that guided the industry but with increased competition and advancement in technology, companies are now aiming at maximizing their profits at the expense of the well-being of the consumers. The law comes at an opportune moment when the world is gaping with the issue of Genetically Modified Organisms. The debate on GMOs has been on-going for a considerable period and still, there are not substantive steps that have been made to regulate the use and safety of these products. Typically, the American market is the one that is infiltrated with the largest percentage of GMO products in the entire universe.

Hero Essay Example | Topics and Well Written Essays - 750 words - 1

Hero - Essay Example Moreover, they have the right skills and training that can make a difference and finally, keep on working towards their goals, even after several hindrances. Heroism can be achieved in several aspects depending on the particular field the hero is involved in. Several figures in the society have made particular efforts that have been given higher dignity and respect for the efforts they have done. The general public, however, has a negative perception with the regard to extreme sports (Smith. line 5). They despise the people who choose to take risks considering them as careless ‘adrenaline junkies’ who are eventually an affliction to the society. These taxpayers add that when a person involves himself in risks and becomes in need of salvage or gets injured, the expenses for their rescue are catered for by the taxpayers (Smith. line 10). For instance, backcountry salvage after skiers cause an avalanche will cost them a thousand of dollars. Skateboarders also involve themselves in sporting activities that result to great damage to both public and private property and injury to the correspondent skateboarders. Several discussion s have been brought up at great length in the media, but the discussions rarely focus on the negative aspects that limit the access to the sports that are risky. Despite all these factors, most of the people around the globe are, fairly to say, love to do well. People, at the very least, try to follow a kind of secular golden rule that translates to ‘try not to make any harm’; but in most communities around the world there are some people who take this to a further step that is extreme. These kinds of persons are considered social entrepreneurs and some of them end up being famous, at least in several circles (Moore. line 1). For instance, some people have played the role of the corporation in supporting local development. According to (Yunus.

Assignment 5 Essay Example | Topics and Well Written Essays - 1500 words - 2

Assignment 5 - Essay Example More generally, we can see that cross-cultural encounters do not always end well for everybody involved. Before understanding what a cross-cultural encounter can do, it is important to understand what one is. In the broadest meaning, such an encounter could be described as any in which two different cultures meet. More specifically, it is one in which ideas that are different between cultures are exchanged, with varying results. In the case of Benin, one of the exchanges was â€Å"the discovery of Benin art by Europeans†. (Mackie 16) This can be seen in the last paragraph of the passage from Bacon, which states that some of the things found in the houses were â€Å"castings of wonderful delicacy of detail, and some magnificently carved tusks†. In the background, we can see that the Benin were perhaps initially pleased by contact with the West. Presumably, they happily traded for the â€Å"glass walking sticks, old uniforms, absurd umbrellas† and so on that Bacon describes as being in most of the warehouses. However, the exchange obviously did not go well for the Benin. In the context Mackie gives us, we know that Bacon is an invader trying to bring Benin â€Å"firmly under British control†. (Mackie 17) Although it is not explicitly mentioned in the passage, some sense of this chilling reason behind the cross-cultural encounter can be seen in the way Bacon describes the Benin people. Bacon was largely unimpressed with what he found, and so the cultural exchange which could have taken place was limited by the Europeans existing prejudices about the Benin people. The way the passage describes the Benin as â€Å"natives† who were tricked by â€Å"the usual cheap finery† reinforces the idea that the Europeans only wanted to manipulate this different culture for their own ends. The fact that the passage describes the Benin in very negative tones elsewhere, such as explaining the â€Å"ruined and uninhabited houses† as being

Dominos Pizza Essay Example for Free

Dominos Pizza Essay The legend of Domino’s Pizza dates back to December, 1960 with the purchase of a small pizza shop in Ypsilanti, Michigan by brothers Tom and Jim Monaghan. The brothers bought the restaurant from friend Dominick DeVarti for USD500 cash and assuming the stores USD8,000 debt (Dicke, 1992). Neither Tom nor Jim had the intention of making the restaurant business their career, but rather saw the opportunity as a part-time venture to help cover the cost of their studies at the nearby University of Michigan. By June the store was earning a profitable USD400 a week but briskly fell off when students at the University went home for summer. Faced with the prospect of a slow phase, Jim sold Tom his half of the business in 1961 and changed the name from Dominick’s to Domino’s. The same year, Tom decided to quit school to devote more time to the business. Aware of his lack of experience in pizza making and operations and management, Tom spent much of his time visiting many similar pizzerias around the state acquiring advice on operations and recipes. By the mid 60’s, Tom had restructured the interior of the store, rearranged all areas and systems, ultimately improving the flow of work in all facets of the operation from order-taking to delivery. â€Å"Monaghan’s system was reminiscent of those developed by the managers of White Castle Hamburger in the 20’s and the McDonald brothers in the 40’s† (Dicke, 1992). The implementation of this system formulized the production process as a unified whole, and included the standardization of materials, clever and thoughtful placement of equipment, and detailed division of labor; all geared to achieve the continuous production of its limited product line. By 1967, Domino’s emphasis on uniform quality and rapid delivery proved a successful system for operating a pizza shop and therefore provided opportunity for expansion through franchising. 3. HISTORY IN MALAYSIA The company landed in Malaysia in September 1997. Launched by its founder, Tom Monaghan himself, Domino’s Pizza became an overnight sensation. It was so well-received that Domino’s Malaysia’s commissary was recognised in the Annual Domino’s International Audit as the Best Commissary in Asia Pacific. 4. PRODUCTS [pic] Exhibit 4. 1 Domino’s Pizza Customer Benefit Package Domino’s Pizza offers a wide range of meals to its customers. They offer variety of pizza, pasta, side orders and beverages. They have 5 unique pizza crusts i. e. Classic Hand Tossed, Crunchy Thin Crust, Cheese Burst Double Decker, New York Crust and Extreme Edge to satisfy Malaysian customers’ appetite. [pic][pic][pic][pic][pic] Exhibit 4. 2 Domino’s Pizza 5 unique Pizza Crust Domino’s Pizza also offered numbers of topping such as Ultimate Hawaiian, 7-Meat Wonders, Meatasaurus, Prawn Passion, Chicken Perfection, Tuna Extreme, Prawn Sensation, BBQ Chicken, Aloha Chicken, Extravaganza, Classified Chicken, Plain Cheese, Beef Pepperoni, Chicken Pepperoni, Classic Chicken, Flaming Tuna, Meat Mania, Seafood Delight, Spicy Sambal, Spicy Sausage, Tuna Temptation, Vegie Fiesta and Vegie Galore. Domino’s Pizza also allowed their customers to customize their pizza by offering 2 options i. e. Make Your Own and Half Half. [pic][pic][pic][pic][pic] [pic][pic][pic][pic][pic] [pic][pic][pic][pic][pic] [pic][pic][pic][pic][pic] [pic][pic][pic][pic][pic] Exhibit 4. 3 Domino’s Pizza delicious Specialty Pizza Customize Pizza Domino’s Pizza comes with 3 Signature Pizza Sauces such as Domino’s Signature Sauce, Spicy Sambal Sauce and Top Secret Sauce. [pic] [pic] [pic] Exhibit 4. 4 Domino’s Pizza signature Pizza Sauces. Domino’s Pizza also serve varieties of side orders such as Chicken Wings BBQ, Chicken Wings Hot Spicy, Spaghetti Bolognese, Chicken Lasagna, Creamy Custard Puff Desert, Garlic Twisty Bread, Garlic Cheese Onion Rings, BreadStix, Banana Kaya Desert, CinnaStix Icing and Chocolate Lava Cake. Domino’s Pizza also offers Coca-Cola, Sprite and Fruit Tree Fresh Apple Aloe Vera for its beverages. The above products are considered primary goods for Domino’s Pizza and these products will ensure that Domino’s Pizza customer’s needs of foods will be fulfill. Domino’s Pizza has introduced its Unique Selling Preposition (USPs) which includes:- 1. 30-Minutes Delivery Guarantee! Dominos is the only pizza company that guarantees customer’s order will arrive within 30 minutes or Domino’s will give its customer a free Regular Pizza voucher; 2. Product Satisfaction Guarantee Dominos guarantees satisfaction! Their pizza and side orders are guaranteed to be hot, fresh, and great tasting when they arrives at customer’s doorstep, otherwise Domino’s will replace the product or refund customer’s money. 3. 15-Minute Take-Away Guarantee Dominos guarantees customers will receive their Take-Away orders within 15 minutes or Domino’s will give them a free Personal Pizza voucher. 4. Free Delivery No extra charges for delivery to customer’s doorstep. Domino’s Pizza also introduced discount coupons for its customers’ future purchase. This method is really works for Domino’s Pizza where they tie-up their customer with the attractive offer for future purchase. This will also create loyalty among Domino’s Pizza customers. Domino’s Pizza also allowed their online customers to pay their orders using credit card where previously they only accept cash payment for the online purchase. The above services can be considered as peripheral services where it will benefit Domino’s Pizza customers and will add confident for the customers to choose Domino’s Pizza rather than other Domino’s Pizza competitors such as Pizza Hut and Papa John. [pic][pic][pic][pic] Exhibit 4. 5 Domino’s Pizza Unique Selling Prepositions (USPs). Further to the above Domino’s Pizza also obtained a Halal Certification for all its products from Jabatan Kemajuan Islam, Malaysia (JAKIM) which will add more confident to Domino’s Pizza current and future customers. 5. VALUE CHAIN [pic] Exhibit 5. 1 Domino’s Pizza Value Chain It is important to consider how a customer need drives Dominos to create the product. The customer need that drives the entire value chain is the need for a dependable take away restaurant, reasonably priced hot quality food and variety that suits the local palette. Dominos has focused on these key customer needs throughout the value chain, and has not allowed any digressions in this area unlike other competitors who have evolved a mixed model of full service restaurants and takeaway outlets, or a hybrid combination of both. This has diluted their strengths in the segment Dominos focuses on Takeaway / Home delivery. Its global operational model allows for lean stores, well-trained staff and flexibility at a country level to customize menus to suit customer tastes. Operational requirements have prompted the use of technology to make the customer experience more enriching, it has a history of firsts – they were the first to use TV as a distribution channel, an online tracking system that allows customers to track the pizza order and a proprietary point of sale system. A combination of the Company level strategy and the Operational Strategy has resulted in Dominos having a reputation for reliability and consistent pizza quality – these strategies have ensured that Dominos continues to meet its customer needs. 6. OPERATIONS STRATEGY. Dominos operations strategy mainly focuses on the providing high service quality to the customer: 1. Minimize operations cost: To minimize the operating cost by improving the efficiencies and process at the stores. 2. Strategic store locations to facilitate the delivery service: To leverage the strategic location of the store in order to facilitate quick service to the customer and maximize the revenue. 3. Production oriented store designs: To utilize the production oriented store design in order to facilitate efficient production and quick service to the customer. 4. Efficient order taking, production and delivery: To execute an efficient operational process that includes order taking, pizza preparation, cooking, boxing and delivery. 5. Use of Domino’s PULSE point-of-sale system: Use of Domino’s PULSE system to improve operating efficiencies, provide corporate management with easy access to financial and marketing data and reduce time consumption and expenses. 6. Product and process innovations: To promote an innovative culture that increases both quality and efficiency. 7. A focused menu: To maintain a focused menu that is designed to present an attractive quality offering to customers, while minimizing order errors, and expediting the order taking and food preparation processes. 8. A comprehensive store operations evaluation program: To utilize a comprehensive store audit program to ensure that stores are meeting both as the expectations of the customers. The Performance Prioritizing would help Dominos in prioritizing its operational strategies based on the order-winning criteria and the current issues it faces in relation to the competition. 1. Excess zone – Dominos invests in promotional strategy to a greater extent as compared to other food chain outlets. It offers many discount coupons to attract customers. Discount offers do help to some extent in attracting customers but too many discount and promotions tend to lower the brand image. So Dominos need to cut down some expenses in that section which will not affect its sales. 2. Appropriate zone – Dominos has got an excellent unmatched home delivery service through which it stays ahead of its rivals. The ? 30-minute luxury? of Dominos has given the brand a strong image among the customers. This gives Dominos a clear balance between its competitors and customers. 3. Improve zone – Dominos need to improve its product quality in order to maintain reputed. It needs to emphasize on the pizza quality and prioritizing all aspects that relate to the customer. For example, Pizza Hut specifies the calories consumption in each pizza. This reflects the brand concern for the customer. So Dominos should also initiate some measures which would foster the â€Å"emotional connection† to its customers. 4. Urgent action zone – In order to increase the service to customers, Dominos should ensure speedy delivery of pizzas to customers. For this, Dominos need to work on its existing process design. There should be enough space and staff for service and extra machines to handle any machinery failure during peak periods. 7. REFERENCES 1) http://www. wikipedia. org 2) http://www. dominospizza. com. my Discount Coupon for future purchase Free Delivery Service Credit Card payment for online orders 15-Minutes Take-Away Guarantee 30-Minutes Delivery Guarantee Pizza Side Orders Beverages.

Advantages Of Aluminium As A Shipbuilding Material Engineering Essay

Advantages Of Aluminium As A Shipbuilding Material Engineering Essay The use of aluminium in any vessel involves a radical set of production methods compared to traditional shipbuilding processes. Hence, the methods used for the construction of aluminium vessels are an important factor in the feasibility study. The welding of aluminium is susceptible to hot cracking and can only be done using certain processes. It is important to employ the correct welding methods to serve different purposes. As aluminium technology matures over the years, new production methods such as aluminium extrusions were introduced in a bid to save time and which has also proven to be economical. The use of aluminium in naval shipbuilding exists in two forms; first there is the aluminium-steel ship, where in the case, the superstructure is made from aluminium intended for topside weight saving, and the hull made from steel. Then there is the all-aluminium ship, with the purpose of achieving a considerable overall reduction in weight. It is important to understand that though both forms have their advantages, there are design issues that must be addressed related to the use of aluminium in naval vessel. Background 1.2.1 Advantages of aluminium as a shipbuilding material Aluminiums most important characteristic is its light weight. When coupled with a reasonable tensile strength, it has grown to become the choice of material for many naval ships in the world. In a research by Wade (1996), when it comes to naval shipbuilding, mission capability is the most heavily evaluated criteria of the program. Speed is an increasingly important parameter under mission capability due to the shift in the maritime strategy of the worlds navies from blue-water operations that include traditional Anti-Submarine Warfare, Anti-Air Warfare and Surface Action to littoral operations focusing on surveillance, mine-clearing, counter-terrorism and support for landing operations. Ship Structure Committee (2012) suggests that there are many design parameters that can be optimized for a better performance, where structural weight is one such parameter that gives the most out of cost efficiency. According to Lamb and Beavers (2010), a decrease in weight relates directly to the reduction in material costs and operating costs throughout the service life while reduction in the power demand gives a higher fuel efficiency, higher speed, longer range and additional tonnage capacity. Also, aluminium gives additional benefits in the form of maintenance cost savings, where less painting is required. Brown (1999) mentioned that corrosion protection offered by aluminium is around 100 times slower than structural steel. The excellent corrosion-resistance of aluminium owes its trait to the thin layer of aluminium oxide that forms immediately when the metal is exposed to air, protecting it from external elements. The use of lightweight material like aluminium can also lead to stealth improvement (International Ship Structure Committee, 2012). In a timespan of just over a decade, aluminium high speed vessels have evolved from 30m long vessels that carried passengers and operated in littoral waters, to 120m long vessels that could carry both passengers and vehicles which operated in the open waters. Ship Structure Committee (2012) gave an overview of the prospect of aluminium in naval shipbuilding. Aluminium is a growingly popular metal in the marine industry, typically the naval shipbuilding industry because of the wide range of physical and mechanical properties that can be created through the alloying process. Aluminium can be alloyed with chromium, copper, magnesium, manganese, scandium, silicon, silver, tin, titanium, zinc and zirconium. This wide range of alloying produces different grades of metal each with different properties. Promising properties includes reduction in stress corrosion susceptibility, improving of toughness, strength and hardness, improving of strength without a decrease in ductility, good weldability, increase in tensile strength, elimination of hot cracking in welds, decrease in electrical conductivity and reduction in quench-sensitivity. However, the discrepancy of the material property and behaviour of aluminium was found to vary with different sources (Sielski, 2007). The differences come as a result of different standards used for determining yield strength. Some tests were done using a 50-mm gage length that measures only weld metal and heat-affected zone, and other tests use a 250-mm gage length sample that includes the base metal. Shown in the following is one such example of aluminiums yield strength discrepancy. Table (1), extracted from (Sielski, 2007). 1.2.2 Disadvantages of aluminium as a shipbuilding material Like any other material, aluminium also has its drawbacks. The two most important properties of a material are perhaps its yield strength and modulus of elasticity, a structure will be designed with considerations around the two properties to ensure that it is able to withstand a given load without exceeding certain permissible deflections and stress level, where the stress level is equal to the yield stress divided by a factor of safety. Albeit aluminium alloy has a high strength-to-weight ratio, it is to be noted that for every strong aluminium alloy in terms of yield strength, there is a stronger structural steel available. In terms of Modulus of Elasticity, which is the measure of stiffness of a material, aluminium and steel measures at 69 GPa and 200 GPa respectively. Since aluminiums stiffness is only a third of steel, it will likely be deformed three times more easily than steel if put under high strain. Therefore the use of aluminium alloy is generally only limited to vessels of up to 130 meters in length (Ship Structure Committee, 2008); the longer the vessel the more stiffening is required, until a point of impracticability. The figure below illustrates the undefined yield strength of an aluminium alloy as compared to mild steel. It is important to note that for aluminium, normally 0.2% strain limit or proof stress is used for design purposes. Yield Strength of Steel and Aluminium Figure (1), graph taken from (http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=217pageid=2144417131) Another consideration is the low melting point of aluminium. As a naval vessel will likely be subjected to on-board fire if it comes under attack, the loss of mechanical properties of aluminium when temperature exceeds 200ËÅ ¡C (Ferraris, 2005) is unfavourable. Some classification societies and navies do not permit the use of aluminium for structural applications. While DnV, ABS and RINA permit the use of light alloy and AA5xxx series, Lloyds register does not. Brown (1999) noted that the cost of aluminium is roughly five times the cost of steel. Though it may be feasible to replace structural steel with aluminium alloy in view of the latters weight-saving and corrosion resistance properties, but it might not necessarily be economical. Table (2) Current Methods To determine the applicability of aluminium in naval vessels, it is important to look at the current aluminium technology available. The manufacturing and production process for aluminium is relatively new. Aluminium welding like the FSW process was invented just two decades ago at the Welding Institute in the UK. For aluminium usages to be feasible for large scale production of naval vessels, then the overall productivity must be improved. Such can be achieved through the application of aluminium extrusion and FSW as these methods offer significant cost savings (Collette et al., 2008). The existing studies on the reliability of aluminium stiffened panels can also give a clear idea of some of the impacts of aluminium usage. 1.3.1 Aluminium extrusions Adding to the advantages of using aluminium is its ability to be extruded. Extrusion can allow complex design of stiffeners to be produced which can, if used appropriately; reduce the effect of stresses experienced in the mid-ship region due to hull girder bending. Collette et al. (2008) researched on the ultimate strength and optimization of aluminium extrusions. Extrusion allows a designer to replace conventional welded plates or stiffeners with extruded profiles of varying thicknesses and it can be used on decks and side shells, places with large amount of area for an increase in weight savings. This method effectively reduces the number of welds to be performed and also reduces the complexity of the overall design of the structure. The study examined three different types of extruded stiffeners, the conventional T type, the sandwich type and the hat type for use on board a high-speed vessel. The performance of all three types was found to be similar, and the study concluded that the panel should be selected based on considerations rather than which has the best strength to weight ratio. Such considerations may include cost, ease of construction and material fatigue. In the figure below, the joining of conventional plate to the stiffener requires welding while for the extruded panel, both the plate and stiffener is extruded as a single unit. Sectional view of Aluminium Extrusion panels Figure (2) 1.3.2 MIG and FSW welding To consider the feasibility of using aluminium in shipbuilding, it is important to look at aluminiums weldability. Metal-Inert-Gas (MIG) welding, a subtype of Gas-Metal-Arc-Welding (GMAW) is the earliest form of welding for aluminium plates. In the 1950-60s, further developments gave more versatility which resulted in a highly used industrial process nowadays. Until recently, a new and better method of aluminium welding is invented, namely the Friction-Stir-Welding (FSW). FSW is a new concept of welding where the metal is not melted for the joining process so that the mechanical properties remain unaltered as much as possible. The join between the two plates is then softened for the metal to fuse using mechanical pressure. Kulekci (2010) notes that the FSW increases tensile, impact, and fatigue strength of the welded joint as compared to MIG process. Less hardness change and a narrower heat-affected zone can be expected in the welded material as less heat is produced from the FSW process. Higher heat intensity from the MIG process can damage the mechanical properties of aluminium. By using FSW, production rate and quality will increase and production costs will decrease. Friction-Stir Welding Process Figure (3), pictures from (http://www.fpe.co.uk/processes/friction-stir-welding) 1.3.3 Heat-Affected Zone Mahoney et al. (1998) researched on the FSW process induced Heat-affected zone (HAZ) of the 7075 T-651 aluminium alloy. A series of tensile tests both longitudinal and transverse to the weld produced results that showed the weakest region is at the lower temperature location within 7 to 8mm from the edge of the weld area. While the average weldable aluminium alloy displays a 30 to 60% reduction in yield and ultimate strength, the loss in ultimate strength of FSW aluminium alloy is only around 25% and the yield strength at the HAZ is about 45% less than the base metal. 1.3.4 Strength and reliability in aluminium stiffened panels Benson, Downes and Dow (2009) note that as aluminium alloy is an established structural material in the shipbuilding industry for high speed crafts and naval vessels, the analysis for large high speed craft operating in ocean environments have since developed rigorous methodologies for the evaluation of ultimate strength in the hull girder. The fast increase in capacity and size of aluminium vessels has led to the demand in new engineering tools and solutions to effectively analyse the structural performance of these vessels. One of it could be the analysis on the ultimate and fatigue strength of aluminium stiffened panels. The ultimate and fatigue strength of the panels can be predicted by using the Reliability method, which consists of firstly using limit state equations to determine when the structural member has failed. Secondly, to determine the average value and the collection of random variables distribution in the limit state equation. Then the final step is to estimate the probability of a failure. Collette (2005) researched that in the Stress-life or S-N fatigue approach, the fatigue life of a material is determined by applying continuously a varying load of constant amplitude until a crack is observed. However the main drawback is that it is not able to give feedback on the seriousness or the size of the crack. That is where the Initial-propagation of I-P method proved to be more useful. The main difference between both is that when the crack starts to form in the material, I-P method can estimate the growth using a fracture mechanics model. 1.3.5 All-aluminium naval ship With all the existing technologies and methods available for aluminium shipbuilding, aluminium has the potential to replace steel in the future as the main ship construction material. Lamb and Beavers (2010) studied on the significance of an all-aluminium naval ship. It proposes two types of aluminium frigate, one with a reduced draft, the other an aluminium equivalent of a steel frigate, with identical draft and similar in weight. Aluminium ship with a reduced draft can allow for a reduction of block coefficient, thereby reducing resistance and increasing speed. With a finer hull, less power is required for propulsion, in turn cutting costs during operation. The authors went on to conduct an analysis of steel and aluminium equivalent naval vessel design focusing on the acquisition and ownership costs. The findings showed that an aluminium ship can be constructed with just 7.5% of the cost of an equivalent steel ship even though 50% more labour hours are required for construction of the aluminium ship. The authors highlighted that this is possible due to the overwhelming benefits of aluminiums significantly lighter weight. Aluminium ship was also found to have operational and ownership cost advantages. Furthermore, advancement of aluminium technology in manufacturing process and design methods has closed the gap between steel and aluminium acquisition costs which in some cases, shipyards are producing aluminium structures more cost effectively than equivalent steel structures. 1.3.6 Hull-superstructure interaction One of the important factors to consider when designing a naval vessel is its hull-superstructure interaction. With the aid of structural analysis software MAESTRO, Hughes and Jeom (2010) determined that Hull-Superstructure Interaction is a very complex study that can only be visualised effectively through 3D finite element model, rather than an inadequate beam theory. The vertical center of gravity for any naval vessel is critical, therefore it is important to keep the center of gravity as low as possible, either by reducing the size or using a lighter material in the superstructure. Another important thing to note of Hull-Superstructure Interaction is the superstructure continuity with the ship side. A superstructure will participate substantially in hull girder bending in vertical continuation with the ship sides if the superstructure is long and continuous. It will undergo the same bending radius as the hull. If the superstructure rises from the same plane as that of the ship sides, then the bending will be maximal. To exclude the superstructure from any hull girder bending, it is possible to do so through offsetting it from the side sides. If superstructure is not in line with the ship sides, due to the flexibility of the deck beams, the sides of the superstructure can be subjected to a much larger radius of curvature. In the case of such design, then an intermediate transverse bulkhead must be included in amid-ship for the purpose of terminating excessive cyclic deflections and stresses in the deck structure. The above are especially critical as a design consideration with regards to naval vessels. To further complicate matters; in a naval vessel, the amid-ship portion is used for RAS operation, or Replenishment At Sea. RAS operations are very difficult manoeuvres to execute; and it has to take place in amid-ship due to the heavier pitching motions of the vessel at both ends. In addition to that, RAS operations also require a large open deck area on both sides of the vessel. This means a reduction in the size, or width of the superstructure in amid-ship, precisely the area which experiences the largest hull girder bending. 1.3.7 Fatigue-induced cracking In the case of an aluminium superstructure, the fatigue experienced will be even greater than for an equivalent steel superstructure (Grabovac et al., 1999). The cases of similar Royal Australian Navy FFG-7 class frigates which experienced fatigue-induced cracking in the aluminium superstructure were caused by a combination of applied cyclic stresses and stress concentration interacting with a region of material weakness. This problem of fatigue-induced cracking has surfaced in almost all ships of this class. The vessel has a continuous aluminium superstructure welded atop a steel hull, which is prone to a substantial amount of hull-girder bending (Hughes and Jeom, 2010). This further reflects on how the Hull-Superstructure Interaction can affect a vessel. In the case of their study, composite material is then chosen for repairing of the cracked region by adhesive bonding, which proved to be working later on with subsequent series of assessments. Methodology Lamb and Beavers (2010) introduced three types of ship for their study, the baseline steel, the aluminium reduced draft and the aluminium reduced block coefficient ship for comparison. The aluminium reduced block coefficient has the same draft as the baseline steel ship but its block coefficient is much lower than the other aluminium ship. The authors designed a 10m long mid-ship section of a naval vessel and then derived the scantlings using the ABS High Speed Naval Craft Rules. The scantlings include steel, aluminium and aluminium extrusion. Subsequently, bending moment and stress calculations were performed and the results shown were much less than the design stress of 23.5 t/cm ² for steel and 12.4 t/cm ² for aluminium. Reasons for the huge differences were given that most of the plating is based on allowable minimum thickness rather than that derived from the formulas. 1.4.1 Linear Stress Analysis The structural study in the present paper will adopt the Linear Stress Analysis method. Similar to the work of Lamb and Beavers (2010), the material behaviour in this study will only be looked at in the elastic range. In the Linear Stress Analysis, the stress is assumed to be directly proportional to the strain and the structural deformations are proportional to the load. Shown below is the stress-strain graph of a material, where the limit of proportionality is the limit of the Linear Stress Analysis. Considerations will not be made for the behaviour after the limit of proportionality. Where (C) is the proof stress of the material. Stress-strain graph Figure (4), graph taken from (http://www.sr.bham.ac.uk/xmm/structures3.html) In the case of Non-linear Stress Analysis, problems are solved by applying the load slowly, and then take account of the deflection with each increment. Stresses will be updated with each increment until the full load is applied. A more complex Non-linear FEA requires iterations for equilibrium with each increment; hence it is a computationally expensive approach. 1.5 Discussion Aluminium usage in naval shipbuilding has been increasing steadily over the years as shown in the literature above. Commercial and merchant aluminium vessels were built with different purposes and intentions in mind, some built for an increase in speed, some for more capacity and some simply for costs saving. In the case of naval ships however, they share more similarities. Common objectives would be an increase in speed and payload, if not for a reduction in draft. It is therefore important to understand what different aluminium alloys can offer for different specific function of the ship. Aluminium alloy as mentioned earlier was found to have some discrepancies among various authorities; this might be due to the poor definition of aluminiums yield strength due to the nature of its properties. Nonetheless, aluminiums yield strength will be taken as 0.2% of its strain limit. Designing an all-aluminium vessel of a 130m in length is an inherently complex task, and the strongest design, most up-to-date methods of production and manufacturing must be adopted to reduce the risk of a structural failure. Due to the nature of the method employed in this paper, where a standard steel hull will be replaced by an aluminium equivalent, it is important to consider the application of aluminium extrusion as a more effective way to increase the stiffness of the hull to ensure no deformation takes place prematurely. As fatigue-induced stresses was found on almost all of the FFG-7 class frigates, there is a need to study the hull-superstructure interaction of the vessel and understand the effects if applied on an all-aluminium vessel. Among the past studies, few have made comparison between a steel ship and an aluminium ship. One notable work is from Lamb and Beavers (2010), which based their calculations on a hypothesised frigate. This present paper differentiates from that in a way that it looks at the differences between the two materials if used on an existing vessel. For a ship that already has an optimum hull form, and re-designing it would be irrelevant due to specific mission capabilities, it will be useful to adopt this approach. Another way to look at it is that certain navies might prefer to build an aluminium equivalent of a steel Off-the-Shelf (OTS) ship like the FFG-7 which has proven to be a cheap and seaworthy ship, than to completely redesign an entire vessel. The design process of a new naval vessel can take up to several years. Apart from that, the past research of the all-aluminium ship with its cost and feasibility study was found to be outdated and non-applicable to the present year. The present research will provide an up to date costs comparison between steel and aluminium, inclusive of costs incurred in the welding process, and with the additional consideration for aluminium extrusions. Also critical will be the consideration of the various methods of welding. It is important to note that there are limitations within this feasibility study. The Linear Stress Analysis method adopted is only accurate to a certain extent and Non-linear Stress Analysis method should be adopted for any future work in this topic. Also, there are considerations which will not be covered in this feasibility study. Factors such as the lack of infrastructure for aluminium naval shipbuilding in terms of aluminium workshops and supply of aluminium panels will not be considered. Limitations may also include the lack of skilled workers and expertise in aluminium manufacturing and ship production. 1.6 Aims and Objectives In short, the purpose of this paper is to study the feasibility of using aluminium as a naval shipbuilding material. To achieve that, it is necessary to include the common shipbuilding material, steel, for comparison. This paper aims to give a clearer comparison, in terms of designs, methods used, costs incurred and production time of the two ships. The US Navy FFG-7 class frigate will be used as a base ship. Designed in the mid-1970s by Bath Iron Works and partner Gibbs Cox, FFG-7 frigate is intended to serve as an inexpensive escort ship. Its area of operations includes protecting merchant convoys, replenish groups, landing forces, submarines and carrier battle groups; also performing anti-submarine warfare or surface action. The frigate has a steel hull with an aluminium superstructure intended for weight saving. The overall bending stress characteristics in the mid-ship section of the frigate will be presented through load, buoyancy, shear force and bending moment calculations; one with steel hull and the other, a hypothesised aluminium hull of the same dimensions. Essentially, constraining the dimensions of the hull for an aluminium equivalent will result in an increase in plate thickness due to the reduction in the section moduli of aluminium. An alternative could be the increase in the number of stiffeners to be used and ultimately, the final design of the aluminium equivalent mid-ship section should include both methods for a section modulus increment. The results produced should show that an aluminium hull would still be sufficient in terms of section modulus to keep the maximum bending stress values under the design stress of the frigate, at 131.75 N/mm ² (Ship Structure Committee, 2002). All calculations in the present structural analysis will be based upon the linear elastic region of the materials only. Through the study on a mid-ship section, it can provide an idea of the stress characteristics of the entire vessel as the maximum bending moment will usually takes place in that region. Finite Element Analysis software MAESTRO will be used to model a mid-ship section of the naval vessel and give a better understanding of the structural stresses acting on the aluminium hull. The paper will go on further to present the costs relating to the two ships, in terms of acquisition, productivity and ownership of the vessels with respect to the current steel and aluminium prices. The results from the study will be analysed and discussed, after that the conclusion will be drawn accordingly.

The Newspaper as a Learning Tool -- Education Teaching

Newspapers have a long history of being regarded as a useful educational tool, and their use in a classroom setting dates back further than most might expect. Take, for instance, this quotation: "Much has been said and written on the utility of newspapers; but one principal advantage which might be derived from these publication has been neglected; we mean that of reading them in schools, and by the children in families?newspapers are plenty and cheap ? the cheapest book that can be bought, and the more you buy the better for your children, because every part furnishes some new and valuable information! (Cowen 1)" Although this statement reads like an educator or newspaper publisher of today might have said it, it comes from an article printed in the EasternHerald, June 8, 1795, in the state of Massachusetts. Exemplifying the fact that newspapers have long been viewed as informational tools, this statement also speaks to the tenure of newspapers as an institution. Actual recorded uses of newspapers in the classroom are dated in the 1890s, and in 1911, "The Volume Library" gave great attention to the value of teaching with newspapers. There are many events throughout the twentieth century that also helped develop the prevalent use of newspapers we see in classrooms today. The outbreak of World War II lead to a greater number of students reading the newspaper, both for informational and instructional purposes. In 1929, Richard S. Kimball published a book titled Current Events Instruction. This book was widely accepted by educators of the time, and because it contained suggestions for incorporating current events in the classroom, also became used extensively. Part of Kimball?s instruction for students becoming strong citize... ...A Manual for Teachers and Newspapermen on the Use of Newspapers in the Classroom. New York: American Newspaper Publishers Association Foundation, 1967. Brody, Jeffrey H. and Robert G. Picard. The Newspaper Publishing Industry. Boston: Allyn and Bacon, 1997. Cowen, Marlene Stone. "History of the Newspaper in Education Program." American Newspaper Publishers Association Foundation. ERIC Digest, Washington DC. 1978. DeRoche, Edward F. The Newspaper: A Reference Book for Teachers and Librarians. Santa Barbara, CA: ABC-CLIO Inc., 1991. Newspapers In Education. Partnerships in Education, The Buffalo News. 13 Nov. 1998. . Shipley, Barbara. "Integrating Mass Media Instruction: ?Connecting? NIE and TV Programs for the 21st Century." Annual Conference on Newspapers in Education and Literacy. ERIC Digest, Florida. 15-17 May 1991.

Discursive on Boxing Essay

Boxing is a sport that is adored by millions of people all over the world , it is a contact sport in which the fighting style is called MMA (mixed martial arts), Boxing includes two participants called fighters who battle it out in a series of rounds (12)until the opponent has been knocked out and can’t stand straight for 10 seconds , if the fight is stalemated then the fight goes to three judges in which the match is settled within a points system which the judges take part in , there has been numerous debates over the existence of boxing however the fight is just as tense outside the ring with the supporters in the battle against those who want it to be banned. One reason to ban boxing is the fact that it is thought to have long term health effects to the boxer, diseases such as alzhezmers disease and Parkinson’s disease is common to a boxer as it is caused by numerous blows to the head which occurs constantly in boxing , one prime example of this is a boxer called su gar Ray Robinson as he was the argued as the man who changed boxing but sadly he passed away he died due to azhlmiers disease in 1989 April 12 , this was associated with his boxing career this shows that boxing may lead to a very uncomfortable after career. Addiontaly , critics argue that boxing should be banned as it is an inhumane sport. As the boxers aim is to intentionally hurt their opponent it shows it as a vicious sport but it is seen normal to the public eye for example , if you were to go attack someone in the street you would have criminal charges filed against you but just because they are doing it in a boxing ring it is fine , the public are paying loads of money for the big name fights in boxing to see a man or women punch each other senseless for 2 minutes before someone gets knocked out which is a waste of money , one example of an inhumane incident which happened in the boxing ring was boxer mike Tyson intentionally ripped his opponents ear off with his own teeth , this shows how much of a inhumane effect it has on the public For critics there is an argument that there is a lack of safety towards the blows that are dealt to the head in boxing as no-one can predict what’s going to happen apart from the boxers , a boxer could deal a punch that could kill someone. However as boxing does have its Cons it also does have its Pros in which it shouldn’t be banned , as the boxers give there own consent which state that they are aware of the price they need to pay for being a boxer however the rewards they receive outweighs the price in a boxers mind as it provides a life of fame money and fast cars , most boxers don’t come from wealth backgrounds as it takes years to be a boxer it is usually people who love the sport and have dedicated there life to it which may have saved them for doing something else they may not enjoy or criminal activity†¦ â€Å"Boxing gave me the opputinites to grow into the man i am today† Carrying on the argument in which boxing shouldn’t be banned is the fact that it would lead to the black underground of boxing due to its high demand around the world , this would create a whole new amount of problems as it would mean that the mdecial side of boxing would be abolished from boxing and this would lead to a high amount of casualty rates this would also effect the economic side as it would mean that the tax that is generated by boxing would be abolished and shows the arugment in why the government should let it be. Finally the reason for boxing to stay alive is the entertainment and income boxing provides, as boxing is one of the most loved sports of all time and have fans that dedicate there life to the sport who travel round the world for 12 rounds of boxing in which is something they have chosen to watch and have not been forced into watching boxing in any way , if boxing was banned then it would destroy a part of peoples lives , boxing also contributes towards the job front as this includes , venue staff equipment providers etc and allot of people would be left out of a job After considering both sides of the argument, I think it would be a good idea to not ban boxing as I feel that as boxing does have its limitations on the injury factors, the amount of people that dedicate and the impact it has on the world as we know would be too strong to kill.