Analysing A Contract Of Affreightment Engineering Essay

This is Scenario where we have to analyse one-year Contract of Affreightment ( COA ) to provide 1,750,000 metric tons of Fe ore to the Isdemir Fe & A ; steel work, Turkey. COA contract where ship proprietor agrees to transport a series of lading packages for a fixed monetary value per ton ( Stop Ford M, 2009, pg.183 ) or it is an understanding between an proprietor and a charterer to transport a given measure of lading or measure as required by the charterer during a given period of clip. The proprietor is free to make up one's mind which vas he will utilize. As Operation director of Company we have to happen out whether to offer for this contract or non. In the contract two burden ports are Ponda district attorney Madeira ( Brazil ) for 810,000 metric tons and East intercourse Is, Dampier ( Australia ) for 940,000 Fe ore. Based on the appraisal, Manager has to happen the low Time charter rate by best possible operation of the majority bearer. For happening Time charter tantamount value we have to see several factors sand traps, port charges, canal dues. Stowage factor for Fe ore is 0.40 M3 per metric ton. All Cargo holds are of equal volume and surrogate holds 2, 4, 6 & A ; 8 are empty. In this scenario port charges for Isdemir and Ponta da Madeira is given. Dampier port cost to be calculated merely sing port dues and navigation merely. Ship sand trap is to be planned one time in a unit of ammunition ocean trip. It is to be taken wherever monetary value is cheaper. Current market value is attached in appendix. Now, I will discourse the each inquiry in item one by one as follows.Undertaking 1:Calculate the maximal measure of Fe ore that can be carried from each lading port, based on the ship ‘s design bill of exchange deadweight, and the ship ‘s clasp use For the computation of Maximum measure of Fe that ship can transport depends on the deadweight of the ship. Deadweight is normally denotes Ship transporting capacity in metric tons.Deadweight includes weight of Fuel, shops, H2O, changeless which required onboard ship. Deadweight of this majority bearer is given as 137,000 metric tons Dwt of ship =137,000t Changeless = 500t Fresh H2O = 300t Since Constant and Fresh H2O required all the clip on-board ship. So, we subtract it from ship transporting capacity. Now, Ship can transport = 136, 200t This value besides includes the Fuel weight for one unit of ammunition ocean tripRound ocean trip ponta district attorney Madeira ( Brazil ) -Isdemir ( Meleagris gallopavo ) -ponta da Madeira ( Brazil ) :Sea Distance between Isdemir- ponta district attorney Madeira = 5201 nanometer ( via Gibraltar ) ( Please refer to http: //e-ships.net/dist.htm viewed on 24th Sep. 2010 ) Round the ocean trip distance = 10,402 nanometer Ship speed= 14.2 — — — — ( Given ) Entire Sea clip required cover above distance = 30.5 yearss Sing 10 % possible delay's= 33.6 yearss — — — — — ( 1 )Port TimeHarmonizing to the Appendices 1 & A ; 2 of the contract loading/Discharging rate shall be 40,000 W.M.T ( Wet Metric Tonnes ) per conditions working twenty-four hours. If we consider ladings that ship can transport with changeless and fresh Water = 136, 200t — — — — — – ( 3 ) Loading rate at Ponda district attorney Madeira = 40,000 w.m.t. Approximate laytime in port Ponda district attorney Madeira = 3.05 yearss Dispatching rate at Isdemir = 40,000 w.m.t Approximate Laytime in Isdemir = 3.05 yearss Entire clip in ports = 6.1 yearss Sing 10 % possible hold ‘s = 6.7 yearss — — — — — — – ( 2 ) From ( 1 ) and ( 2 ) Entire figure of yearss for one ocean trip = 40.3 yearss As chief engine fuel ingestion is 42.4t of IFO per twenty-four hours at MCR and 10t of MDO per twenty-four hours at sea and in port. IFO required for 33.6 yearss = 1424 T — — — — — — — — — — – ( 1a ) MDO required for 33.6 yearss = 336 T — — — — — — — — ( 2a ) MDO required in port for 6.7 yearss = 67 T — — — — — – ( 2c ) Entire Tonnes of fuel Required =1826 T — — — — — — — — — — — — — – ( 4 ) From ( 3 ) & A ; ( 4 )Now, Maximum Fe ore that Ship can transport for this routes = 134, 374t( B ) Round ocean trip Dampeir ( Australia ) — Isdemir ( Meleagris gallopavo ) — Dampier ( Australia )Sea TimeSea Distance between Isdemir- Dampeir ( Australia ) = 6479nm ( via Suez ) ( Please refer to http: //e-ships.net/dist.htm viewed on 24th Sep. 2010 ) Round the ocean trip distance = 12,958 nanometer Ship speed = 14.2 — — — — ( Given ) Entire Sea clip required cover above distance = 3 8.0 yearss Sing 10 % possible hold ‘s = 41.8 yearss — — — — — ( 5 )Port TimeHarmonizing to the Appendices 1 & A ; 2 of the contract loading/Discharging rate shall be 40,000 W.M.T ( Wet Metric Tonnes ) per conditions working twenty-four hours. If we consider ladings that ship can transport with changeless and fresh Water = 136, 200t Loading rate at Dampier = 40,000 w.m.t. Approximate laytime in port Dampier = 3.05 twenty-four hours Dispatching rate at Isdemir = 40,000 w.m.t Approximate Laytime in Isdemir = 3.05 yearss Entire clip in ports = 6.1 yearss Sing 10 % possible hold ‘s = 6.7 yearss — — — — — — – ( 6 ) From ( 5 ) and ( 6 ) Entire no of yearss for one ocean trip = 48.5 yearss Entire Requirement of Fuel for One Round Ocean trip: At Sea: As chief engine fuel ingestion is 42.4t of IFO per twenty-four hours at MCR and 10t of MDO per twenty-four hours at sea and in port. IFO required for 41.8 yearss = 1424 T — — — — — — — — — — — — ( 7a ) MDO required for 41.8 yearss = 336 T — — — — — — — — — — — — — ( 7b ) MDO required in port for 6.7 yearss = 67 T — — — — — — — — — — — — — — ( 7c ) Entire Tonnes of fuel Required =2,258 T — — — — — — — — — — — — — — — — — — — — ( 7 ) From ( 3 ) & A ; ( 7 )Now, Maximum Fe ore that Ship can transport for this routes = 133, 942tUndertaking 2:Calculate the cost per metric ton of lading from each lading port to Isdemir. The circular ocean trip costs per metric tons are required for and ‘up and running ‘ service, get downing at the burden ports. For the computation of Cost per tones in each ocean trip we have to happen out cost incurred by port operation, fuel use, canal theodolite, running the vas. On the footing of Voyage cost, running cost and lading carried by ship we can happen the Cost per metric ton. Now we will happen Voyage cost and running cost based on given informations and consequences of inquiry 1.( a ) Ponda district attorney Madeira -Isdemir-Ponda district attorney Madeira:We will happen the Fuel cost foremost. We know Entire tones of IFO and MDO required for one unit of ammunition ocean trip From ( 1a ) , ( 2b ) & A ; ( 2c ) Entire tones of IFO required = 1424 T Entire tones of MDO required =403 T IFO= $ 435 /tones MDO= $ 640 /tones ( Please refer hypertext transfer protocol: //www.bunkerworld.com viewed on 24th Sep.2010 ) Cost for 1424 T of IFO = $ 619, 440 Cost for 403 T of MDO = $ 257, 920 Entire fuel cost = $ 877, 360 — — — — — — — — — — ( 8 )Port Cost:Port cost given for these two ports are as follows: Ponda district attorney Madeira ( Brazil ) = $ 45,000 Isdemir ( Turkey ) = $ 35,000 Entire port cost = $ 80,000 — — — — — — — — — — – ( 9 ) On this path at that place will non be any canal dues as vas will sail via GIBRALTAR, so there is no canal cost on this path. There is no CANAL DUES So, from ( 8 ) & A ; ( 9 ) Ocean trip Cost = $ 957, 360 — — — — — — — — — — — — — — — – ( 10 ) Runing Cost: AS Ship running cost given as $ 6000 per twenty-four hours which include rewards of crew, care of ship, shop, insurance, disposal etc. From ( 1 ) & A ; ( 2 ) entire no of yearss for one unit of ammunition ocean trip = 40.3 yearss Runing cost for 40.3 yearss = $ 241,553 — — — — — — – ( 11 ) From ( 10 ) & A ; ( 11 ) Run COST + VOYAGE COST = $ 1, 19 8,193 — — — — — — — — — — — — — — – ( 12 ) Now from ( 3 ) & A ; ( 4 ) Maximum lading that ship can transport = 134, 374t — — — — — — — — — — — — — ( 13 ) So, from ( 12 ) & A ; ( 13 ) We have entire ocean trip cost, running cost and lading that ship can transport for unit of ammunition the ocean trip.Cost per metric ton = $ 8.91( B ) Ocean trip Dampier ( Australia ) -Isdemir ( Turkey ) – Dampier ( Australia ) :Fuel Cost: From the ( 7a ) , ( 7b ) , ( 7c ) we can easy happen the entire measure of IFO and MDO required for one unit of ammunition Ocean trip Entire tones of IFO needed =1773 T Entire tones of MDO needed=485t Taking market mean sand trap monetary value as follows ; IFO= $ 435 /tones MDO= $ 640 /tones ( Please refer hypertext transfer protocol: //www.bunkerworld.com viewed on 24th Sep.2010 ) Entire cost for 1773t of IFO = $ 771, 255 Entire cost for 485 T of MDO= $ 310, 400 Entire fuel cost = $ 1081655 — — — — — — — — — — — ( 14 ) PORT Cost: Port cost for Isdemir ( Turkey ) = $ 35,000 — — — — — — — — — — — — ( given ) Port cost Dampier is to be calculated on the sing port dues and navigation charges merely. We can entree agenda charges by Dampier port authorization by sing following site which is besides attached in appendix and mentioned in mentions. ( hypertext transfer protocol: //www.dpa.wa.gov.au/Port-Facilities/Schedule-of-DPA-Charges.aspx/ HYPERLINK â€Å" hypertext transfer protocol: //www.dpa.wa.gov.au/Port-Facilities/Schedule-of-DPA-Charges.aspx/ Access on Sep. 24 † Entree on Sep. 24, 2010 ) As GT of ship is given 73,999t Port due charges are to be calculated=0.1916/tonnes Port dues will be= $ 14178.20 — — — — — — — — — — — — — — — ( 15 ) We will non see Lay-up fee as vas has order does n't necessitate to be at ground tackle Navigation CAHRGES ; For the vas entrance and going from the port greater than 10,000 GRT the navigation charges are $ 8,846.64 for both ways. We will besides see the navigation Exemption fee $ 810. So, Entire navigation charges would be = $ 9656.64 — — — — — — — — — — — ( 16 ) From ( 15 ) & A ; ( 16 ) Port cost at Dampier = $ 23, 834 — — — — — — — — — — — — — — — — — — — ( 17 ) So when calculate the Port cost for Isdemir ( Turkey ) with Port cost at Dampier Entire port cost round the ocean trip = $ 58834 — — — — — — — — — — — — – ( 18 )Canal Cost:On this routes vas would be go throughing through Suez Canal, so we have to happen the Toll charges by canal authorization on both manner that is with loaded ship and ballast ship. Suez Canal net tunnage ( SCNT ) =67,109t ( Mentioning hypertext transfer protocol: //www.suezcanal.gov.eg/calc.aspx Access on Sep. 24th 2010 ) On this official site of Suez Canal 1 can happen approximative toll charges per theodolite based on SCNT. These are as follows: Dampier – Isdemier ( loaded ship ) = $ 151, 995, Isdemier – Dampier ( ballast ship ) = $ 129, 288 These values are calculated with the aid of official Suez Canal site which attach in appendix of this study. Entire cost Canal dues round the voyages= $ 281283 — — — — — — — — — – ( 19 ) From ( 14 ) , ( 18 ) , ( 19 ) .Voyage cost= $ 1, 421, 772 — — — — — — — — — — — — — ( 20 )Run Cost: Entire no of yearss for one unit of ammunition ocean trip =48.5 yearss As running cost per twenty-four hours for ship= $ 6000 — — — — – ( given ) Runing cost for ocean trip for 48.5 days= $ 291, 000 — — — — — — — — — — — — — – ( 21 ) Ocean trip cost + Running cost together will give entire disbursals for coveted figure of lading. From ( 20 ) & A ; ( 21 ) Ocean trip cost + Running cost= $ 1, 712, 722 — — — — — — — — — — — — — — — — – ( 22 ) Now, we have Voyage cost, running cost, Fe ore that ship can transport so we can happen out the Cost per unit. Maximum lading that ship can carry=134, 374t From ( 22 )Cost per metric ton = $ 12.75 — — — — — — — — — — — — — — — — — — — — — — – ( 23 )Undertaking 3Calculate the clip charter equivalent ( TCE ) for each path, presuming a COA cargo rate of $ 15 per metric ton ( antique Ponta da Madeira ) and $ 20 per metric ton ( ex Dampier ) ( include 3 % agent ‘s committee on the clip charter ) . Ponda district attorney Madeira -Isdemir-Ponda district attorney Madeira: Freight rate given for this Voyage is $ 15 per metric ton. If we consider that ship carries Maximum lading in a ocean trip. From ( 13 ) Maximum lading that ship can carry= 134, 374t Rate = $ 15per metric ton So, Entire cargo for 134, 374t of Fe ore = $ 2, 015, 610 gross — — — — — — — — — — — — – ( 24 ) This Gross value includes the 3 % agent committee, therefore subtracting that from gross value. Net cargo value = $ 1, 955, 142 cyberspace — — — — — — — — — — — — — — — — — — — — — — — — — — ( 25 ) Now, in order to happen out Time charter equivalent ( TCE ) that includes the ocean trip cost and does n't include the running cost. TCE is a standard industry step of the mean day-to-day gross public presentation of a vas. The TCE rate achieved on a given ocean trip is expressed in US $ /day and is by and large calculated by deducting ocean trip disbursals, including sand traps and port charges, from ocean trip gross which will give Gross ocean trip excess. Then spliting by entire no of yearss in ocean trip will give Gross day-to-day excess. From ( 10 ) & A ; ( 25 ) Gross Voyage surplus= $ 997, 782 Dividing this value by no of yearss in ocean trip will give us Gross day-to-day excess Entire no of yearss 40.3 yearss Gross day-to-day excess = $ 24, 758 Now, if we include 3 % agent committee so it will give usTime charter Equivalent = $ 742, 74 per twenty-four hours( B ) Ocean trip Dampier ( Australia ) -Isdemir ( Turkey ) – Dampier ( Australia ) :Freight rate for this ocean trip given is $ 20 per metric ton ; in the same we can happen the Time charter value for this path Maximum lading that ship can carry=133, 942t Rate= $ 20 per metric ton Freight earned in one unit of ammunition voyage= $ 267, 8840 gross Subtracting 3 % agent committee from above gross value = 259, 847, 5 — — — — — — — — – ( 26 ) Subtracting ocean trip disbursals from above will give us gross ocean trip excess From ( 20 ) & A ; ( 26 ) 1, 421, 772 Gross ocean trip excess value= $ 1, 176, 703 If we divide this by no of yearss in a ocean trip so it will give us Gross day-to-day excess = $ 24, 261 Adding 3 % agent committee to above will give us Time charter tantamount valueTime charter value= $ 7, 278, 3 per twenty-four hoursUndertaking 4Calculate the figure of the cargos needed to finish the entire Fe ore tunnages from each lading port and the ship velocities required for every bit spaced seafarings throughout the twelvemonth.( a ) Ponda district attorney Madeira -Isdemir-Ponda district attorney Madeira:Number of cargos needed on this path to finish the contract can establish on the footing of ship transporting capacity. On this path upper limit lading that ship can transport = 134, 374t Iron ore to transported through this path = 810,000t — — – ( Given ) If we divide Iron ore measure to the maximal lading that ship can transport, that will give us figure of cargos required to finish the contract. No of cargos = 7 Here, Ship requires seafaring of 7 times with laden lading and 6 times as ballast ship in order to finish the contract. Ship velocity on this path can be adjusted to 14.0 knots which will give 44 twenty-four hours ‘s unit of ammunition ocean trip seafaring. This manner, it can be 44 yearss of every bit spaced seafaring over about 295 yearss.( B ) Ocean trip Dampier ( Australia ) -Isdemir ( Turkey ) – Dampier ( Australia ) :Same manner, we can happen for this path excessively. Maximum lading that ship can carry=121102t Entire measure of Iron ore to be transported=940,000t Dividing measure of Fe ore by maximal lading that ship can transport will give us: No of shipments=8 In this instance ship is required to pass through Suez Canal 8 times with laden lading and 7 times as ballast ship for the completion of contract. So, canal dues are different for laden ship and ballast ship, hence to be considered carefully. Ship velocity on this path can be adjusted to 14.1 knots with laden lading and 14.2 knots with ballast ship which will give 52 yearss of circular ocean trip seafaring. So, each ocean trip could be of every bit separated 52 yearss. On this path, at least one cargo required to be completed by another ship which could be the ship on Ponda district attorney Madeira path. . If 52 yearss round ocean trip seafaring is to be considered with one ship, it will take about 395 yearss which is beyond the contracted period. Initially, one ship can get down the lading work on this path and subsequently, can be joined by ship which will run on the Ponda district attorney Madeira path. Entire 2 ships will be required for completion of needed tunnage of Fe ore and contract.Undertaking 5Sum up the bearer ‘s contractual duties in respects of: A A A A a ) Requirements for ships on the contract A A A A B ) Nominating ships for each cargo A A A A degree Celsius ) Keeping the loading ballad can schedule and effects for non A A A A vitamin D ) Delays and divergences en path A A A A vitamin E ) Presentment on reaching at burden and discharge ports. This is contract issued by General board of directors of ISDEMIR for pellets, ball and all right Fe ore. Duration of the contract is clearly mentioned in the contract. Quantity tunnage allowance is given as A ±10 % to be considered for reasoning the contract between ISDEMIR and Carrier. There are several issue which may impact the services over the period of clip. It may be type of vas, cargo, punishment, cargo rate, payment, and 3rd party engagement, cancellation of contract, force majeure, and public presentation bond. This issue can be discussed in summarized signifier as below: Requirement for ships on the contract: Carrier has to utilize the ship which he enlisted in his offer or any change should be done with permission of ISDEMIR and marketer. If ship is of foreign flag so it will requires blessing of Import section. Ship should non be of south Cyprus flag in any instance. Ship has to be with clean holds and ready for lading in all facets. Ship ‘s lading clasp hatches should be certified for H2O stringency by categorization of society. Vessel should hold P & A ; I club insurance to cover the charter period. Concluding demand for ship is that it should hold category throughout the contractual period certified by categorization of society. Nominating ship for each cargo Nomination of vessel shall take topographic point 20 yearss prior to commencement day of the month of lading laycan. In failure to make so ISDEMIR has wholly right to impact the conveyance on the footing of name and history of bearer. All the right to sing cancellation of day of the month of ballad yearss is reserved by ISDEMIR, Carrier has agreed to revised ballad yearss. Loading laycan agenda has to be agreed by three party ISDEMIR, marketer and bearer. Loading laycan agreed upon by ISDEMIR and bearer before contract should non divert. However, if bearer request change of lading laycan so ISDEMIR will hold all right to accept or reject it. It will be treated as without lading laycan even if it is approved by ISDEMIR. The full demurrage claim by marketer which may originate due to change in lading laycan agenda shall be borne bearer. If ISDEMIR rejects the change so bearer has to follow original laycan otherwise it may take heavy punishment, cancellation of contract. It is discussed in following subdivision. Keeping the loading laycan agenda and effects for non Loading laycan factor is really of import in this contract as it is involved with keeping agenda, change of vas, or any hold which may impact agenda of peculiar vas. Any hold which is caused by vas without informing ISDEMIR may ensue in terrible punishment or expiration of contract. All the losingss, amendss or any claim by marketer should be borne by bearer under this status irrespective of original laycan. If the burden laycan is affected except the force majeure, bearer will be apt to pay USD $ 3,000 for each twenty-four hours up to 5 yearss, from 5th twenty-four hours onwards he will pay US $ 6,000 per twenty-four hours. If the hold period exceeds 15 yearss ISDEMIR has right to call off the contract. ISDEMIR has the right to acquire the same conveyance trade done by another ship-owner/charterer. If loading laycan agenda is effected by force majeure event so vas will non invalidate any liabilities due to this. Any hold should non transcend more than 15 yearss otherwise ISDEMIR wil l hold all right and same trade may be fulfilled by same bearer or another ship-owner/charterer. Any hold occurred should be approved by ISDEMIR and invariably reported to them otherwise once more bearer will be apt for all losingss, amendss and claims. Delaies and divergences en path Any hold which will happen during the contract period excepting force majeure event apt for punishment if it is non approved by ISDEMIR. Carrier should do certain that any alteration in lading laycan reported to ISDEMIR punctually approved. In any instance hold period should non transcend 15 yearss if this happens ISDEMIR will hold all right to take any action which they think appropriate. If the hold occurred at lading port bearer shall be apt to pay US $ 5,000 per twenty-four hours and US $ 10,000 per twenty-four hours after 10th twenty-four hours. In the contract under General term subdivision 12 it is clearly mentioned that divergence from direct path should non happen except for the fuel replenishment or force majeure without ISDEMIR blessing. Once vas is loaded it should direct canvas to droping port without naming any port. Presentment of reaching at burden and discharge ports Carrier or shipmaster has to give the definite ETA and tunnage to be loaded. Vessel geting at lading port should give the verification to ISDEMIR, marketer of 10 yearss, 7days, 48 hour, 24 hour prior reaching to lading port. In instance of dispatching port it has to follow same process that is inform marketer and ISDEMIR, sum loaded unequivocal ETA for ISDEMIR port prior 10 yearss, 7days,48 hour and 24 hour. All the presentment or preparedness at burden port should be received during weekdays Monday-Friday between 08:00 to 17:00 hour and on Saturday between 09:00 to 13:00 hours. Any notice after 13:00 hours on Saturday shall be count as 08:00 hours of following on the job twenty-four hours. Notice of preparedness can be tendered mundane between 08:00 to 17:00 hours and any notice after this clip will considered at 08:00 hours of following twenty-four hours. Laytime will be counted after 24 hours of tendering and credence of the notice of preparedness.Undertaking 6Sum up your reserve sing costs and gross, finishing the cargos to agenda and the suitableness of the ships for the COA. Recommend, with ground, whether the company should or should non subject a command for this contract, based on current cargo market conditions and any other relevant considerations. The contract invites freight offers $ 15 per metric ton ( antique Ponda da Madeira ) and $ 20 per metric ton ( ex Dampier ) for the 810,000 and 940,000 tunnage of Fe ore severally. In the ocean trip appraisal cost per metric ton for antique pool district attorney Madeira and ex Dampier comes $ 10.57 and $ 16.65 severally ( delight see the excel sheet ) . Gross ocean trip excess for antique Ponda district attorney Madeira path is $ 748,623 and gross day-to-day excess is $ 16,983 per twenty-four hours whereas Gross ocean trip excess on ex Dampier path is $ 644,958 and gross day-to-day excess is $ 12,412 per twenty-four hours. Now, if Net ocean trip excess to be discussed on ex Ponda district attorney Madeira path once more it gives really sound figure with $ 484,138 while on ex Dampier path it is $ 333,175.The net day-to-day excess on antique Ponda district attorney Madeira path is $ 10,983 per twenty-four hours and on the ex Dampier path it is $ 6,412 per twenty-four hours ( delight s ee excel sheet ) Here, this is clear that antique Ponda district attorney Madeira path is more profitable asnet day-to-day excess on this path higher than ex Dampier path. Ex Ponda district attorney Madeira path more money generating and can be easy completed with every bit spaced seafaring over the contract period. Cargos required on the both the path ex Ponda district attorney Madeira and ex Dampier path are 7 and 8. On the ex Ponda district attorney Madeira path it will take 295 yearss with 44 yearss every bit spaced sailing which can be easy fulfilled. On the other manus, on the ex Dampier path it will take 395 yearss complete the contract with one ship. So, it is required to hold one cargo acquire done with another ship. This could be the ship which runs on ex Ponda da path. The ship which will run on the ex Ponda district attorney Madeira path will hold adequate clip to finish the needed tunnage of Fe ore hence can be easy do one cargo on the ex Dampier path. Capsize ship will be most suited for this contract as they can easy raise the over 100,000 metric tons of lading. Capsize ship

Evolution of the Immune System

John Frelinger Dr. Travis Organic Evolution 30 April 2012 Evolution of the Immune System Animals are constantly bombarded by an immensely varied array of disease causing pathogens including bacteria, fungi, viruses and other parasites. The number of microbes living in the human body outnumber the actual human cells by a factor of 10, and for every single species of animal and plant on Earth, there are viruses that infect them. With the unrelenting threat of disease-causing pathogens all around us, and even within us, how can the constantly vulnerable organisms defend themselves?Evolution has provided an answer to this problem—the immune system. The immune system is a vastly complex orchestra of cells working together to help eliminate potentially harmful pathogens from the body. Some form of host defense is found in every multicellular organism, however there are myriad variations in the immune systems of different organisms. Vertebrates have evolved an acquired immune respons e, in which a specific immune system is activated to clear an infection that is initially controlled by a non-specific (innate) immune response.This highly adaptable system is important to the survival of vertebrate species. Surprisingly, however, 90% of animals (invertebrates) do not have this kind of response. Despite lacking a seemingly critical adaptation, invertebrates continue to survive and reproduce. Why does it appear necessary for vertebrates to have an acquired response in order to survive, but the more numerous invertebrate species do not? Research indicates that there is an evolutionary lineage of the immune system that stems from the split of invertebrates and vertebrates.Innate immunity, which is found in all animals, is assumed to be at the beginning of this evolutionary tree. After the diversification of species (vertebrates branching from invertebrates), mechanisms of immunity also diverged. In this paper I will first discuss the function of the innate immune syste m because of its older evolutionary history, followed by the adaptive immune response that evolved later in vertebrate lineages. I will then conclude by placing the development of the innate and adaptive immune system in an evolutionary context.Innate immunity is the first line of defense for an organism and is made up of elements that protect the organism from pathogens. Anatomical aspects such as skin act as an impermeable barrier to infectious pathogens. Chemical and biological factors, including anti-microbial peptides like defensins, are also used to inhibit bacterial growth and prevent colonization. Another immunological factor of the innate immune system are phagocytic cells (macrophages), which are cells that engulf and eliminate foreign pathogens.These cells operate using a variety of different and generalized receptors that recognize a broad range of molecular patterns expressed by pathogens that initiate phagocytosis. One such family of receptors, known as Toll-like Recep tors, recognizes common pathogen elements such as bacterial wall components or viral DNA sequences. This component is found in virtually every multicellular organism, ranging from sponges to humans (Muller and Muller 2003). Plants also express proteins that are very similar to toll-like receptors, indicating that this aspect of the innate immune system predates the divergence of plants and animals.The innate immune system is so valuable to an organism’s survival because it is always present and in many instances can prevent pathogen entry or replication. This, in turn, prevents a harmful infection from ever occurring inside the host. Although invertebrates do not have the acquired immune response, recent research has shown that their innate response is more complex than previously thought. Insects can activate their immune systems to remain in a higher state in order to prepare for a pathogen invasion.During bedbug mating, females are frequently injured in the process because males will stab a female to inject his sperm, infecting her with bacteria and exposing her to other potential infections. In response, females have evolved ways to enhance their immune system prior to mating in anticipation of pathogen invasion (Morrow and Arnqvist 2003). Bumblebees are capable of maintaining a heightened immune system in response to a prior pathogen invasion to aid in the prevention of future infections. Immunity such as this has been shown to pass down vertically to offspring, therefore increasing their fitness (Tyler et al. 006). Slugs have also evolved an interesting alternative response in the form of increased mutation rates of certain immune cell receptors, which allows their immune system to adapt to many foreign elements (Litman and Cooper 2007). While it is inherently different from the acquired immune response, this sensitive management of immune function was previously thought to be reserved as a characteristic of vertebrates and the adaptive immune res ponse. As vertebrates began to diverge and evolve from invertebrates, so too did the immune system.The new adaptive branch of the immune system originally conferred a new selective advantage for vertebrates because of its specificity and immense flexibility in recognizing new pathogens. The clonal selection theory, in which each lymphocyte clonally expresses a specific antigen receptor, can help explain how the immune system can express an extremely wide range of potential receptors capable of recognizing new pathogens. Lymphocytes are undifferentiated cells that ultimately become B-cells (Bone Marrow) or T-cells (Thymus) depending on where they migrate.B-cells possess a uniquely structured immunoglobulin molecule (antibodies exposed on outer surface) that recognizes and binds to a specific molecular counterpart. When a foreign antigen is bound to the antibody, it stimulates the replication of that specific B-cell with the aid of Helper T-cells, which enhance B-cell maturation. This process results in the clonal expansion of cells that recognize the original antigen and subsequent production of antibodies that help in the eradication of the pathogen. An important point of this process is that the pathogens select which lymphocytes expand.It also results in memory B-cells and T-cells that constitute a persistent immune memory for a particular antigen. This expanded pool of memory cells is activated upon a second exposure to the same pathogen, resulting in a much more rapid immune response to clear infection. Other types of T-cells are also produced during this process. For example, cytotoxic T-cells target and kill virally infected cells, while suppressor or regulatory T-cells are activated when the infectious pathogens are eliminated and signal the immune system to subside.Cells such as these also experience selective pressures–ones that react to self-tissue (and harm the host) would be selected against, while those that recognize pathogens would surviv e and replicate. The clonal selection theory addresses many aspects of vertebrate immunity, however, it does not explain all of the mysteries behind the variety of antibody generation. The sheer number of antibodies that can be produced and the finding that the acquired immune response can generate antibodies to manmade molecules that are not present in nature led scientists to explore how such diversity is generated.Research done by Susumu Tonegawa in the 1970’s indicated that B-cells have the ability to produce a huge number of antibodies due to a gene rearrangement process. B cells originally have many sets of gene segments (Variable, Diverse, and Joining) and over the course of its maturation reduce these segments to one of each type for the production of the antibody heavy chain. A similar process of gene rearrangement is involved for the production of the antibody light chain. The light chain and heavy chain proteins then assemble to form the complete antibody molecule that can specifically bind to an antigen.Two genes that are critical for this process to work are RAG1 and RAG2. These genes are known as recombination-activating genes and distinguish the vertebrate immune system from other lineages. These genes are critical to the process because they act as the excision and joining molecules that cut and knit back together the individual VDJ segments that make up the antibody. This results in the huge potential of diverse antibodies that can be produced—hundreds of millions of possible antibody types generated from a much smaller number of gene segments that can react with virtually any antigen.This sophisticated process may have originally been introduced by a mobile genetic element known as transposons. These transposable elements have the ability to excise themselves from one DNA sequence and incorporate themselves into another, very similar to the RAG1 and RAG2 gene functions. After the divergence of jawed and jawless vertebrates, a vi ral infection of the jawed lineage’s gametes may have introduced a transposon into their genome. (Thompson 1995). This may have provided the raw materials necessary to facilitate the development of adaptive immunity.The acquired response appears to have evolved from a single lineage because all vertebrates (excluding jawless fish) retain this RAG-mediated gene rearrangement system. The specificity of this kind of response may have been selected for because of its ability to recognize a diverse number of pathogens, but also because it could conserve more energy resources compared to the generalized defense of the innate response. The adaptive immune response is structured in such a way that it can respond to an almost infinite number of pathogens, while utilizing a relatively limited number of genes.Figure 1 illustrates a potential phylogeny based on some immune system adaptations previously discussed. Figure 1 (Reproduced from Litman and Cooper 2007). Although the vertebrate immune system is extremely adaptable to many potential threats, it is far from perfect. Epidemics such as the Bubonic Plague or the 1918 influenza killed millions of people. Similarly, when the Spanish colonized the New World, they also introduced pathogens that were devastating to the indigenous people.One of the major limitations of the acquired immune response is that it takes a relatively long time to respond after the initial exposure in order to be effective. This time is required because the lymphocytes must clonally expand before a pathogen can be eliminated. For example, in the case of the Native Americans, when they were exposed to the new pathogens, the infections spread to a portion of the population that was large enough to leave them unable to forage for food or to tend to the sick. As a result, it nearly wiped out the entire civilization.This limitation is significant as illustrated by these and many other historical epidemics. These difficulties have led scientists t o think more fully about the effectiveness of the vertebrate immune system. If the immune system has the potential to combat virtually any conceivable threat, why then can’t it always eliminate any potentially harmful pathogen? We also look to immune hypersensitivity and autoimmunity as potential drawbacks of the immune system, indicating further imperfections of the adaptation. When the immune system mistakenly targets self-tissue, it results in serious consequences for the organism.Concepts in evolutionary biology might help address these issues. In this context the immune system does not have to be inherently perfect by design because only some individuals of a population need to survive and reproduce for that lineage to continue. The variation introduced by the immune system generates the diversity necessary for a population to adapt to changing environmental pressures. As others have suggested, a zebra doesn’t have to outrun the lion, just the slowest member of th e herd (Hedrick 2004).The immune system is subjected to the same constraints as other characteristics in regards to natural selection. In this case even if a trait is not optimal, but helps the organism survive and reproduce, it will be selected for, regardless of any deleterious effects experienced post-reproduction. Many, but not all immunologists, believe the development of the adaptive immune system with gene rearrangement was a critical advance. It has been proposed that the development of the adaptive immune system was the â€Å"Big Bang† for the evolution of immune system (Travis 2009).This development might have also enabled the rapid expansion of vertebrates. Moreover, the idea that the adaptive immune system can generate receptors for molecules that are not yet present, makes it extremely flexible and has been called â€Å"forward thinking† (Travis 2009). Thus, while the immune system does not anticipate every change in organisms it is ready for them by const ructing a large repertoire of antigen specific receptors, which confers a big selective advantage. Others have suggested the adaptive immune system conserves resources, and thus is better than the innate system.In contrast, as noted earlier, invertebrates lack a fully functional adaptive immune system and are very successful. Moreover, others have argued that even if the immune system was an advantage, it was only temporary and short lived (Hedrick 2004). Another relevant issue deals with the concept of parasite and host co-evolution. This constant struggle is exemplified by a quote from Lewis Carroll’s â€Å"Through the Looking Glass†, â€Å"it takes all the running you can do, to keep in the same place†. This concept, originally introduced by Leigh Van Valen, has been termed the Red Queen hypothesis.According to this hypothesis, an improvement in fitness for one species will lead to a selective advantage for that species. However, since species are often coevo lving with one another, improvement in one species implies that it gains a competitive advantage over the other species, and thus has the potential to outcompete for shared resources. This means that fitness increase in one evolutionary system will tend to lead to fitness decrease in another system. The only way that a competing species can maintain its relative fitness is to improve on its own design.Although this theory was used to help explain the extinction of species and the evolution of sexual reproduction, it has been applied to many aspects of predator prey relationships including the development of the immune system. Because animals are constantly attacked by fast-adapting parasites, the host immune system cannot possibly gain an advantage over them. The evolution of the immune system is caused by the small advantages conferred as a result of variation in the recognition of pathogens.As suggested by Steven Hedrick, â€Å"by selecting for more elusive parasites, the immune system is ultimately the cause of its own necessity† (Hedrick 2004). Thus paradoxically, the immune system, since it places a strong selective pressure on pathogens and parasites, ultimately has become essential for vertebrates to survive. By placing selective pressure on parasites that can evolve much more rapidly than animals (due to their higher reproductive/mutation rate), it results in parasites that are increasingly more effective at infecting hosts of that species.In terms of the immune system, one strategy that parasites have developed is a means of altering their own antigens to become unrecognizable. In this way they escape the adaptive immune system by altering their structure. For example, trypanosomes can switch the major target antigen for antibodies, which they use as a strategy to extend the amount of time they reside in the host. This results in a more contagious host that will increase the spread of pathogens to new hosts (Stockdale et al. 2008).Similarly, be cause the HIV polymerase is very error prone with no proof reading mechanism, many mutations arise in the HIV proteins during its infection. While the adaptive immune system can make neutralizing antibodies, new variants arise that can no longer be recognized by the antibodies. These new variants have a selective advantage and escape, and thus the adaptive immune system  is always lagging behind. In terms of the host immune response, there is also an extremely high level  of polymorphism of major histocompatibility genes, which enable the population to respond to a wider array of antigens using T-cells.The benefit of this heterozygosity is that it allows the individual to respond to a wider variety of antigens. Moreover this diversity helps ensure that even though some individuals may perish, the particular pathogen will not be able to eliminate the entire population. Some infectious agents have even taken it a step further and evolved ways to utilize the host immune system to i ncrease their own fitness. For example, infections that result in pus filled cysts can be used to carry parasitic progeny and spread to new hosts when they burst.Even though this may help the host clear an infection, the pathogen can use this to increase its own fitness and infect more individuals. The Human Immunodeficiency Virus (HIV) utilizes the host immune system by initially infecting macrophages, and subsequently T-cells, which the virus uses as a reservoir for reproduction and as a means to spread to many different tissues in the body (Orenstein 2001). It also serves the virus to target immune cells for infection because crippling the host immune response akes it easier for the virus to spread throughout the body and eventually to new hosts (due to the higher viral load). In this light, it is possible that invertebrates did not evolve the adaptive immune response because they may have never needed it. By lacking the ability to develop a â€Å"memory† for a particular pathogen, those pathogens did not evolve anti-immune mechanisms to counter the host immune response. An immune memory could lead to more devious pathogens and result in a more harmful infection in the future.This could have been a better strategy for invertebrates as it may have prevented the co-evolution of more virulent pathogens (Hedrick 2004). The immune system has a long evolutionary history in multicellular organisms. The innate immune system is a critical adaptation that helped these organisms survive the onslaught of parasites and pathogens. Vertebrates possess an adaptive immune response that allowed for the recognition of an almost infinite number of pathogenic antigens, however, it appears to have become a one-way road with the coevolution of pathogens.Once this adaptive system appeared in the vertebrate lineage, there was no going back. Because of the immense flexibility of the adaptive immune response, it places huge selective pressures on pathogens to constantly evolve new mechanisms of infecting hosts. Thus in the context of evolution, even with the incredible versatility of the adaptive immune system, it is likely there can not be an ultimate solution to infection by parasites only a new, perhaps unstable, equilibrium. Works Cited Hedrick, S. (2004). The Acquired Immune System: A Vantage from Beneath.Immunity 21, 607-615. Litman, G. and Cooper, M. (2007). Why Study the Evolution of Immunity? Nature Immunology 8, 547-548. Morrow, E. H. , and Arnqvist, G. (2003). Costly traumatic insemination and a female counter-adaptation in bed bugs. Proceedings of the Royal SocietyB: Biological Sciences. 270: 2377–2381 Muller, W. and Muller, I. (2003). Origin of the Metazoan Immune System: Identification of the Molecules and Their Functions in Sponge. Integrative and Comparative Biology 43, 281-292. Orenstein, J. (2001). The Macrophage in HIV Infection.Immunobiol. 204, 598- 602. Stockdale, C. , Swiderski, M. , Barry D. , and Richard McCulloch (2008). A ntigenic Variation in Trypanosoma brucei: Joining the DOTs. PLoS Biol 6. Thompson, C. B. (1995). New insights into V(D)J recombination and its role in the evolution of the immune system. Immunity 3, 531–539. Travis, John. (2009). â€Å"On the Origin of the Immune System†. Sciencemag Vol. 329. Tyler, E. , Adams, S. , and Mallon, E. (2006), An Immune Response in the Bumblebee,Bombus terrestris leads to increased food consumption. BMC Physiology 6.

Employee Health Plan 2010 Essay Example | Topics and Well Written Essays - 500 words

Employee Health Plan 2010 - Essay Example The Employee Health Department would schedule check-ups and administration of annual PPDs, (kindly spell out) vaccinations such as Hepatitis B, MMR, Varicella and Influenza through regular correspondences and memoranda. This 2010, the Kennedy Health System is considering administering Pertussis Vaccine to those with risk of exposure. Further, a wellness program would be launched this year with the objective of maintaining good health and improving one’s lifestyle through awareness of health risks and practice of well balanced nutritional diet and enough physical exercise. The 2010 Kennedy Health System Employee Health programs focuses on associate vaccination programs assisting in following up on body substance exposures, injuries, and communicable diseases and maintaining employee health records as required by NJDOHSS, OSHA, AOA, and the Joint Commission. In addition, pursuant to the requirements of OSHA and the Joint Commission of Accredited Hospitals Organization, standards on the Safe Patient Handling Act would be highlighted and required orientation and training, as required, would be administered. The wellness programs (weight and stress management, smoking cessation, cardiovascular health management) would be launched on a self-directed approach making it free, voluntary and addresses unique issues tailored to each employee’s needs. The EHP focuses of measuring its effectiveness through performance evaluation reports and regular assessments specifically in areas of high risk exposures such as Sharps/Fluid Exposure; Communicable Diseases; Influenza Vaccinations; Hepatitis Vaccinations, MMR Vaccines, Varicella Vaccines, among others. With the upcoming implementation of the administration for Pertussis Vaccine to those with risk for exposure, appropriate standards and rules of administration would be outlined for dissemination and appropriate guidelines. Benefits for the EHP are available to all new and

Employee Relations Management Style adopted by ACME Engineering Essay

Employee Relations Management Style adopted by ACME Engineering - Essay Example This management style reflects the personality and the perspectives of the manager. In this style of management, the subordinates become dependent over the leaders and they require more supervision from the leaders. These autocratic managers give orders to the subordinates and the subordinates are less trusted by these managers. This management style follows the McGregor’s X theory related to motivation towards workers. The autocratic management style also can be divided into two categories i.e. directive autocrat and permissive autocrat (Williams & Smith, 2010). Paternalistic The nature of the paternalistic management style is also dictatorial and the managers take decisions considering the benefits of the business as well as of the employees. In this form of management, the communication among the subordinates and the superiors is descending, but certain feedbacks related to the management, motivates and encourages for the better performance in the workplace. In this style o f management, the managers pay more concentration to the need of the society. These are the managers who consider the employee opinion and they get influenced with the employee feedback for the management. In spite of the employee participation, the paternalistic managers feel that the employees need directions from the superiors to perform. This management style is related to the Maslow’s motivation theory (Lussier, 2011). Democratic In the democratic management style, the employees are allowed by the managers to participate in the decision making process. In this style of management the decision are taken based on the majority of the opinion of the... The researcher states that management style is one of the most important and vital aspects of an organisation. Management style is the process of interaction in between the superiors and the subordinates of any organisation. Management styles are the featured ways to take necessary decisions and to relate to the managers, and the subordinates of an organisation. Management styles involve various formal as well as informal practices regarding open communication and close supervision with the subordinates. Management style assists in taking decisions by incorporating the views and opinions of the members and the people of an organization. Different types of management styles can be implied in an organisation based on task, business culture and personality, characteristics of workforce and leadership skills among others. Almost every management style has certain nature, methods, deficiencies and strengths. There are certain basic forms of management styles such as autocratic, paternalis tic and democratic. These different types of management styles have different characteristics. In relation to the case study, it can be stated that ACME Engineering is an organisation which has also focused on an effective employee relationship, by providing several facilities and cultivating positive attitudes within the employees. The company, founded in the 1980s, has also faced the reformation related to the employee relation. ACME Engineering has involved their employees to take part in various decision making activities

Social And Legal Aspects Of Computing Assignment

Social And Legal Aspects Of Computing - Assignment Example However, in this case study Susan failed to protect details of her group members by selling the data to businessman and mishandling the backup information which was stored in a USB stick. The information was not available to the users since the database became in accessible and Susan misplaced the only back up that was available. Personal details should also be kept in such a manner that they will portray the accuracy to the users. To achieve this, it is vital for the data to be kept in a place where they cannot be altered without the consent of the owners (Theda & Mary 2010). In the case study, Susan had written information which was irrelevant such as the details regarding the Caroline relationship with her former boyfriend Tom. Such information did not add any value to the information for the purpose it was intended for. Furthermore, Susan allowed another personal to use the data illegally which could result to its loss in authenticity. In addition, Susan forgot the secondary devi ce in which the data was stored, and this created a loophole for other people to access private data which they could alter to suit their personal desires rather than the use for the benefit of the members. Question 2 The principle of data protection act requires that the individual information being generated should be just and legitimate (Theda & Mary 2010). It is a legal requirement that such personal details should be obtained for a specific purpose only and not for any other reason whether legitimate or lawful. Susan violated this rule because she included private information regarding the relationship between Caroline and Tom (her former boy friend) and by adding that there relationship was not genuine, but a mere pretence just meant to hurt her. This information was not related to the reason for which the database of members was required. The regulations also require individual information regarding other people to be processed with their authority (Andrea & Deborah 2011). Th e information held by one person on behalf of others is not supposed to be used for any other purpose apart from the one it was meant for. In this case, Susan shared member’s personal details with Peter for commercial use and in fact she received compensation of ?1000. This was against members wishes since they were included in the deal. Therefore, members are entitled to compensation for the illegitimate use of personal details. Personal details should be kept safe where they cannot easily be accessed by unauthorized parties, spoilt, or replicated (Andrea & Deborah 2011). Susan violated this rule by carelessly sharing information with other people which eventually caused blockage of data maintained in the members’ website. She also misplaced the backup gadget which contained member’s details and probably the gadget was taken by other people. Those people who took that gadget probably went ahead and abused the information contained in it for their personal gains . This denied the group members the right to protection of their personal details which may result to abuse of their details. Question 3 In the case study, Peter replicated the data massively and sent numerous email messages to the clients. The members complained to Susan that

Education. Business degree Research Paper Example | Topics and Well Written Essays - 2500 words

Education. Business degree - Research Paper Example Furthermore, the primary goal of education is to enable one make wise decisions through facilitating and boosting the reasoning of an individual. Moreover, in the current dynamic world education has been used as a tool of earning a living. On a similar theme, education has enabled individuals to specialise in the various diverse fields available in the market for example individuals who specialise in medicine are able to treat people and in turn have been able to earn revenue that serves to improve the living standards. On the other hand, another essential goal that education is purposed to serve is to improve the lives of individuals. Apparently, education has been able to facilitate further research in various fields for instance agriculture which has consequently, led to increase in food production while simultaneously observing quality standards of the yields. On that note, in the field of business education has served to improve the quality of service delivery through the innova tion of machines which improve the efficiency of the work. Furthermore, through education we are able to acknowledge the various business strategies and evaluate on the most appropriate one to employ in the various diverse businesses having different requirements. Moreover, education has also provided a means in which business structures can be comprehensively studied in a bid to expand the various business activities that exist in this dynamic world that is characterised with rapidly changing environment. However, in this paper we focus mainly on the higher education in the field of business. In addition to that, we are going to highlight some of the ways one can acquire a business degree, its advantages and its application to the current business endeavours. First and foremost, a business degree can acquire in a number of ways depending on the specific user needs. On a similar theme, the choice of the manner of study may vary with a number of factors, for instance the issue of geo graphical location of the individual with respect to the institution of learning. On that note, individuals who live far from the educational institution may consider studying online as way of acquiring a business degree. In addition to that, individuals who use this form of studying employ the use of computers; internet to acquire the required educational material for example books and other relevant literature and study online. On the contrary, another important factor that influences the manner in which one can acquire a business degree is the occupation of an individual. Apparently, individuals who have hectic schedules during the day may consider part time schooling as opposed full time since it may not interfere with the daily activities of an individual. In addition to that, this mode of studying entails evening classes and may take a longer period to acquire a business degree as compared to the full time mode of studying since in full time studying, an individual is subjecte d to longer studying hours as compared to the part time mode who may at time study during the weekends only. On the contrary, the duration of acquiring a business degree may vary depending on a number of factors for instance the mode of study of an individual. On the same note, individuals who use the full time mode of study may take a minimum of three years to attain a business degree. In addition to that, individuals who use the part time mode of studying may require a minimum of four to five years in order to achieve this important business degree. However, individuals using this form of studying may in other cases take longer to acquire this degree since some may decide to defer their studies in a bid to

Article Analysis Essay Example | Topics and Well Written Essays - 500 words - 2

Article Analysis - Essay Example According to this method of costing, there are only two parameters needed : the cost of time per unit of supplying resource capacity and the unit times of consumption of resource capacity by products, services, and customers. The author argues that this approach is better since it can be applied even to complex transactions in a large company since more precise cost-driver rates can be determined due to unit times. Therefore, estimating the resource cost per unit for different variables such as cost per cubic meter or cost per megabyte can be ascertained. In addition to this, the article presents the advantage of the new method over the traditional ABC by assuming that employees or machines do not always operate in full capacity thereby presenting a more realistic computation of costs. Because of this, the manager can make important decisions on maximizing the unused or unfulfilled capacity which may mean putting off capitalization to a later time until everything is fully efficient or productive. Another important argument that this article presents is that Time Driven Activity Based Costing can be updated. This enables the management to review the costs according to existing conditions. Kaplan, R. Anderson S. ( 2005 ) Rethinking Activity Based Costing,excerpt from "Time-Driven Activity-Based Costing," Harvard Business Review, Vol. 82, No. 11, November 2004.Retrieved from http://hbswk.hbs.edu/item/4587.html on May 10,