Some thoughts of the article Essay Example | Topics and Well Written Essays - 250 words

Some thoughts of the article - Essay Example Therefore, to address these problems, government should to utilize tools for monetary and fiscal policy. Monetary policies tool entails utilization of discount rates and reserve requirements to control inflation and stabilize the economy. On the contrary, fiscal policies tool entails application of taxes as well as control of government expenditure to achieve certain economic goals (Taylor & Weerapana, 2008). On the contrary, Micro economics refers to a branch of economics that involves the study of decisions made by individuals and firms regarding the scarce resource. Whereby, in micro economics, consumers aims to maximize their utility despite having scarce resource aims to maximize their profits while at the same time minimizing their cost. However, due to limited resources, both firms and individuals experience opportunity cost. Whereby, they have to decide the best alternatives to forgo given the fact that resources are limited (Mankiw, 2011). Normally, in micro economics, the prices of goods and services are determined by market forces of supply and demand as well as government regulations. Therefore, both individuals and firms should take into consideration the issues of tax and government regulations when making their decisions (Chandra,

Columbus in History Research Paper Example | Topics and Well Written Essays - 4250 words

Columbus in History - Research Paper Example The paper tells that the first contact that Columbus had with the Arawak’s was when he first landed at their beach on that Friday morning. He with his men observed that the ‘natives’, as he had yet to establish their cultural affiliation were, were Godless and very friendly people. From Columbus’ perspective, he was more intent on discovering new territories and gold for his king. He constantly talks of how he sights ‘new lands’ and keeps his thoughts on exploring these lands for purposes of conquering them for his kings occupation and his interest in these people is geared towards actualising this mission. He states that: â€Å"When we stepped ashore we saw fine green trees, streams everywhere and different kinds of fruit. I called to the two captains to jump ashore with the rest, who included Rodrigo de Escobedo, secretary of the fleet, and Rodrigo Sanchez de Segovia, asking them to bear solemn witness that in the presence of them all I was taking possession of this island for their Lord and Lady the King and Queen, and I made the necessary declarations which are set down at greater length in the written testimonies†. He observed that they were poor people in all respects based on their appearance and wore no form of clothing. Columbus being a Christian was quick to observe that these people could be easily converted to Christianity as they seemed bright and intelligent. He formed a bias against them based on the misconception that they thought he and his men were from ‘heaven’ and due to their obvious rudimentary social organisation and technological endowment; he thought he was better than them. He alludes to this by recording in his log that they would make good servants. 2 Explain why contact with Columbus is often cited as the beginning of history in the "New World" despite evidence of contact with other peoples and cultures in periods that predated Columbus. Columbus’ contact with the ne w world is often described as the beginning of the history of the new world because he was the first European documented explorer to set foot on the new world. His was a sanctioned exploration and he managed to keep records of the entire expedition through his log. Ideally, he is not the first ‘outsider’ to interact with the new world because recent anthropological and archaeological discoveries have unearthed the fact that there were human interactions with the new world from outsiders earlier than Columbus’ expedition. Traces of the great Vikings have been in areas of the new world that indicate they might have come here earlier than Columbus did. The only difference with Columbus is that he provided a detailed log and took back samples from the new world that spurred the interests of other explorers and this might even be said sparked off the scramble for the new world in a way. 3 Please explain how the histories and lives of very different indigenous communit ies are often subsumed by their identities as "Indians?" Please include a discussion of what is not included and if the differences between indigenous peoples are overshadowed by the historic "Indian" identity. When Columbus set out to discover a better route to the East Indies, he completely missed the mark and landed on another part of the world that was new to him. However he believed that he probably had landed in another part of the East Indies and he thus named all these people he found there as Indians. Due to the nature of his expedition he could not spend enough time with these indigenous people to distinguish who was who and what was the relation between these people and most importantly whether there were any significant differences between these people to warrant their classification as different peoples. It is only much later that missionaries and dedicated anthropologists

A Project Scope Management

A Project Scope Management Scope is the description of the boundaries of the project. It defines what the project will deliver and what it will not deliver. Scope is the view all stakeholders have from the project; it is a definition of the limits of the project. Project Scope Management includes the processes required to ensure that the project includes all the work required, and only the work required to complete the project successfully. Project scope managements primary concern is with defining and controlling what is and is not included in the project. One of the leading causes for project failures is poor management of the project scope, either because the project manager did not spend enough time defining the work, there was not an agreement on the scope by stakeholders, or there was a lack of scope management which leads to adding work not authorized or budgeted to the project, this is known as scope creep. Scope creep, or the uncontrolled changes in a projects scope, is the tendency of a project to in clude more tasks than originally specified, which often leads to higher than planned project costs and an extension of the project end date (Cook-Davies, T. 2002) The purpose of scope change management is to protect the viability of the approved Project Contract (or agreement) and the approved Project Logical Framework (Logframe). In other words, the Project Contract defines the overall scope of the project, and the Logframe which establish a causal link between inputs, processes, outputs, outcomes and objectives of the project. It is not possible to assume there will be no changes during the life of the project. For example, changes may come from the beneficiaries who want additional deliverables, then the initial estimates for budget, and schedule may no longer be valid. If the donor agrees to include the new work into the project scope, the project manager has the right to expect that the current budget and deadline will be modified (usually increased) to reflect this additional work. This new estimated cost, effort and duration now become the approved target (Cook-Davies, T. 2002) All changes to the project scope must be approved by management and the donor; this is one of the principal requirements for scope management. This is not to say the objective of scope management is to avoid any changes to the initial agreement; development projects, due to their nature are initiated mostly on general assumptions. It is expected that as the project makes progress, additional information will lead to new insights that require the project to change its approach and its plans. The purpose of scope management is to establish a process that will allow the incorporation of changes by ensuring the changes contribute to the ultimate goal of the project, changes are agreed by stakeholders and approved by management and the donor. Scope management consists of a series of tasks and steps designed to help the project manager manage the project deliverables, the steps are: (Cook-Davies, T. 2002) Defining the Scope Assigning Scope Work Verifying the Scope Adapting the Scope DEFINING PROJECT SCOPE Defining the project scope is identifying all the work that the project will accomplish in order to achieve its final goal. The work includes the activities identified in the Logframe and the activities the project team has identified that will be necessarily to support the project, these includes activities such as team capacity building, stakeholder management, meetings and project presentations and all significant activities that will consume project resources (Gardiner, P. D. 2005) Project Scope Statement The Project Scope Statement is used to develop and confirm a common understanding of the project scope among key project stakeholders. The scope statement should include the project justification, a brief description of the project outputs and its intended benefits, a brief summary of the project major constraints, assumptions and dependencies with other projects or external initiatives and a statement of what constitutes project success. This document is used as a communications tool with all project stakeholders to ensure all have a common perception of what the projects is and what it is not, it is also used to communicate any approved changes made to the project (Gardiner, P. D. 2005) The project justification describes the need that the project will satisfy or the problem it will address. For example, the increase of economic income of a target population. It also describes the communities or groups of beneficiaries that will benefit from the project outcomes and the locations were the project will work. The brief description also summarizes the tangible outputs of the project such as the number of beneficiaries that received a loan. Project constrains include any significant limitations either imposed by the donor, the beneficiaries or local conditions. For example the beneficiaries may impose the project doesnt include work during harvesting season, or that the donor requires the project to be completed by a certain date. Project assumptions include a list of the conditions that are expected to exist for the project to be a success; conditions that are accepted as true without proof or demonstration, such as the labor contribution of the beneficiaries to complete an activity in the project. Project dependencies are either internal or external factors on which the project is dependent, such as another partner organization that will deliver services or goods that will be used by the project, for example the road reparation work a local municipality needs to complete for the project to have good access to the community. Project success is defined by the stakeholders, specially the donor and the beneficiaries. Success is not only meeting and completing the project activities on time, under budget and in the expected quality that is acceptable to the donor and stakeholders, but how the project outputs produced the desired outcomes that contribute to the well being of the beneficiaries. Success is ultimately defined by the beneficiary so it is good practice to ask and document what the beneficiary expects the project. The project scope statement is the most important tool the project has to frame the project, it is used to evaluate every change request and helps communicate the limits of the project to a wider audience. It is also used as a project information document that puts in concise terms what the project will do (Gardiner, P. D. 2005). Work Breakdown Structure Once the Scope Statement has been completed, the next step to further define the scope is to break it down to its most manageable pieces. The purpose is to develop a complete list of all the tasks that are needed by the project, this list will be used to determine the resources requirements such as the time, skills and cost estimates. It is also used as a baseline for performance measurement and project monitoring, and supports the clear communication of work responsibilities. The output is the Work Breakdown Structure or WBS (Leach,L.P. 1999) The Project Work Breakdown Structure is an outcome oriented analysis of the work involved in the project and defines the total scope of the project. It is a foundation document in project management because it provides the basis for planning and managing the project schedule, budget and requests for any changes or deviations from plans. The WBS is developed in the form of an inverted tree structure, organized by objectives; it looks like an organizational chart which helps visualize the whole project and all its main components. A Work Breakdown Structure (WBS) is a project management technique for defining and organizing the total scope of a project, using a hierarchical tree structure. The first two levels of the WBS define a set of planned outcomes that collectively and exclusively represent 100% of the project scope. At each subsequent level, the children of a parent node collectively and exclusively represent 100% of the scope of their parent node. A well designed Work Break Down Structure describes planned results rather than planned actions. Outcomes are the desired ends of the project, and can be predicted accurately; actions comprise the project plan and may be difficult to predict accurately. A well-designed WBS makes it easy to assign any project activity to one and only one terminal element of the WBS (Leach,L.P. 1999). ASSIGNING SCOPE WORK Once all the work needed to accomplish the project has been identified the next step in the scope management process is to assign the work to the people responsible for it. Inputs to this step include the WBS, the project schedule that identifies when each activity or task should occur, and the Resource Requirements Matrix (RRM), which identifies the skills required to accomplish the activities, this matrix us used to select the project team. Elements of this step include the actions to assign scope work to the project team via the Work Assignment Sheet, and assign work to consultants via the Scope of Work document; part of this process includes collect information on the work completed, get and acceptance of the work by the beneficiaries. (Leach,L.P. 1999) Work Assignment Sheet: The assignment sheet should include the date of the assignment, the expected completion date, the beneficiaries involved and the locations of the activities and any other resources needed to accomplish the activity or task. Depending of the skills and authority of the team member the assignment could be at the objective level or at the task level, but should include a brief description of the instructions or approaches selected to carry out the activity. For example a technical professional may be assigned to accomplish an objective using gender based approaches, while a field worker may be assigned a task to collect baseline data on a specific community using detailed instructions and forms. Scope of Work (SOW) Scope if work is a similar process, but in this case the work is assigned to a contractor or consultant hired to deliver a specific work for the project, The Scope of Work or SOW usually follows a Terms of Reference (TOR) that helped define the objectives and select a consultant to do a specific work that required skills not present in the team or organization. At the completion of the work the consultant should present a document that informs on the progress made and the results and outputs generated by the SOW (Leach,L.P. 1999) VERIFYING THE WORK This step refers to the actions required to ensure that the work delivered meets the specifications of the project and it is used as a guarantee that the project is delivering the promised quality in its work. At the end of the assignment the team members or consultants, report the activities accomplished, any deviations from the plan, changes or modifications to the activity and any information that will help update the project plan. Scope Verification Scope verification deals with obtaining the stakeholders formal acceptance of the completed project work scope and the goods or services delivered. Now, the verification of the project scope includes re-viewing the deliverables to make sure that each is completed satisfactorily. If the project was discontinued earlier, the project scope checking process shall establish and document the level and extent of completion (Turner,J.R.2000). Work Acceptance Once the scope verification confirms that the work meets the requirements of the project, the next step is to obtain acceptance of the work; work acceptance is needed in cases when the beneficiary needs to give testament that the work or activities delivered by the project were achieved as agreed, and that they met the needs of the beneficiaries within the scope of the project. Change Requests Out from the delivery of work and the verification of work, requests to change the scope may occur based on new insights gained on the project, changes in the original conditions or assumptions of the project or discovery of new opportunities. Changes are not necessarily made to correct a situation but could also include changes in approaches or strategies that will impact the project scope. Changes can originate from the project team, beneficiaries, organizations management, or the donor. In any case the project manager should use the Project Scope Change Control Plan defined to manage the process or change request, obtain approval and incorporate and communicate the changes (Turner,J.R.2000). ADAPTING THE SCOPE Once changes to the project scope have been approved, the project needs to update all project plans and communicate these changes to the stakeholders and inform the way the changes will impact the project. Adapting the scope is a step whose sole function is to incorporate changes that will provide improvements to the project and increase the chances for its success (Turner,J.R.2000). Example of the Project Scope Management: Tsunami hits the costal line of India, thousands of people suffered. Government decided to have technology with them using which they can detect the possibility of such natural disaster in advance. Considering this as the project: Define the scope of the project In clear terms, the project here is to develop a new technology with which we can detect the possibilities probability of the occurrences of the natural disasters before they occur so as to save lives of many people. Scope of the project: The scope of the project is defined as the sum total of the projects products their requirements or features. Thus according to this definition of ours, the scope of the current project is: Finding is a similar technology (Less advanced useful) available so that its easy to modify the same to create a new better one. Decide whether the new technology should be feasible enough as to accommodate almost all types of disasters (Like tsunami, earthquakes, cyclones, etc) Finding the availability of the technical other staff so that the project is not delayed. Whether this is to be a portable hardware machine (as a technology), one for each type of disaster OR a heavy one, dealing with (almost) all types of disasters. In case this technology fails at any point of time, what are the backups. (Turner,J.R.2000). Conclusion: At the end of each project phase or at the completion of a significant milestone the project needs to capture the lessons learned in managing the project scope. This include the causes or reason why something did not went according to plans, the causes that contributed to success, and the actions the project took to deal with an issue or challenge. The idea behind is to capture the lessons right after an action and not wait until the end of the project; the project should incorporate a practice that builds a discipline and a routine to capture lessons continuously and creates spaces for the project team to reflect on the lessons and incorporate them in the next phases or cycles of the project. References: Pinto, J. K. and Slevin, D. P. (1988) Critical Success factors across the project, Project Management Journal, 19(3): 67-75 Cook-Davies, T. (2002) The â€Å"real† success factors on projects, International Journal of Project Management, 20(3): 185-90. Gardiner, P. D. (2005) Project Management A strategic planning approach, Palgrave -Macmillan, New York, USA. Leach,L.P.(1999)Critical chain project management improves project performance. Project Management Jour-nal 30(2),39-51. Wheelwright,S.C. and Clark,K.B.(1992)Creating project plans to focus product development Harvard Business Review Mar-Apr,70-82. Turner,J.R.(2000)Editorial: the global body of knowledge. International Journal of Project Management 18(1),1-5. Barber,P., Tomkins, C. and Graves, A.(1999) Decentralised site management-acasestudy. International Journal of Project Management 17(2),113-120. Atkinson,R.(1999)Project management: cost, time and quality, two best guesses and aphenomenon, its [sic] time to accept other success criteria. International Journal of Project Management 17(6), 337-342.

J.B.Priestley’s play, An Inspector Calls - Eva Smith :: English Literature

Eva Smith - character study. There are many reasons for the death of Eva Smith. Each one of the Birling family and Gerald pushed Eva Smith a little closer to suicide but no one person was solely responsible for her death. It was not only the Birling's that contributed to Eva Smith's death but her position in the world she was in, she was very poor and low in society Mr Birling was the first person who we were led to believe started off the train of events that led to the death of Eva Smith. I don't believe that Mr Birling did anything that ultimately push Eva to commit suicide the only thing he did was sack her from his factory after she started to cause trouble demanding higher wages and getting the other girls in the factory to go on strike. Most men in his position would have done the same. Mr Birling said to the inspector, 'She had a lot to say far too much so she had to go ´. Although I don't think that Mr Birling did anything really wrong regarding Eva he does not come off well throughout the play as he shows himself up a number of times because of his personality. The major fault in his personality is that he seems to show no remorse for Eva and his son Eric is annoyed by this. He seems to be a very hard man, and shows no regret for dismissing Eva which led to her death. Sheila was the second person that the Inspector turned on and her part in the run up to Eva's death shows her in an unfavourable light as she turned on Eva because she was jealous of her. Sheila wrongfully used her position as an important customer to turn Eva out of a job. She even admits, 'it was my own fault ´, and that she 'was in a furious temper ´. She was jealous of Eva describing her as a 'very pretty girl too - with big dark eyes ´. Although her actions show her to be a bad tempered, jealous and malicious person you get the impression as she begins to talk that that is quite a harsh view of her and that although she does have bad characteristics she isn ´t really as bad as you first think her to be. She shows herself to be honest admitting straight away all that she had done, that she caught sight of her smiling at the assistant and 'I was furious with her ´. Gerald was the third person to come under the spotlight.

Pipeline Hydraulics Design Basis Engineering Essay

It includes the pipe and flow features of the transported fluid under specified operating conditions as established in the design footing.SpeedThe grapevine has to be laid for the distance of 770km between Portland and Montreal, the fluid in the pipe is Light Crude Oil. Speed of flow in a grapevine is the mean speed based on the pipe diameter and liquid flow rate. Its choice is first measure in the scheming process of our undertaking. The flow speed can hold both advantages and drawbacks. High speeds can do turbulency, and the contact of the fluid on the walls of the pipe which will do harm to the pipes and finally gnaw away the pipe, while low speed on the other manus can do the deposition of particulates in the line and cleanliness of the fluid will be compromised. Therefore, to avoid these problemsliquid lines are usually sized to keep a speed sufficient to maintain the solid atoms from lodging and besides to forestall the eroding of the pipe. Under these considerations the recommended speed is in the scope of 3ft/s to 8ft/s. From this selected scope of speed we have to choose a individual speed. The speed we have selected for our line is 5ft/s. This is the intermediate speed from the recommended scope and all the farther computations will be done on this speed.Velocity SelectionThe scope as mentioned above is taken every bit 3ft/s to 5ft/s. The following measure is to choose a individual speed from this scope. We have selected 5ft/s for our line. The ground for this speed choice is the tradeoff between pipe diameter and figure of pump Stationss. Harmonizing to continuity equation if we increase the speed, the corresponding diameter will cut down but the force per unit area loss will increase due to which a higher figure of pump Stationss are required. Similarly if we decrease the speed, the figure of pump Stationss will cut down but the diameter will increase for a given flow rate. Since the grapevine is laid over a long distance, the grapevine cost holds the major portion of the capital investing hence increasing the diameter will adversely impact the economic sciences of grapevine. This tradeoff is seeable in the computations shown in appendix A. The other ground for taking this speed is that if the flow rate fluctuates in the hereafter for any ground the diameter selected from this intermediate speed will be able to suit those fluctuations without impacting our system.Diameter CalculationCalculation of the diameter is the nucleus of the hydraulic designing.The diameter selected should be able to back up the emphasiss on the pipe, the capacity of the fluid and minimise the force per unit area losingss. Under given flow rate and false speeds, we can cipher the pipe diameter utilizing continuity equation:V=Q/AVolt: Flow speed Q: Volume flow rate A: Cross sectional country The flow rate is given as 109,000bbl/day or 7.1ft^3/s. The diameters are calculated at 3, 4, 5ft/s speeds and the several diameters are 20.83 † , 18.04 † and 16.14 † .Choice of DiameterAs mentioned above 5ft/s is selected as the recommended speed and the corresponding internal diameter ( ID ) is 16.14in.Nominal Pipe SizeFor the internal diameter later we have to cipher the nominal pipe size. To cipher the nominal diameter we refer to the â€Å" Pipe Data † provided for the Carbon Steel. From the tabular array shown in appendix B, it is found out that attendant nominal pipe size will be 18in.Features of FlowDifferent flow belongingss are calculated to find the government of flow, losingss in the pipes. The nature of the flow can be laminal or turbulent.There are two types of the losingss. Major losingss include the losingss due to clash in consecutive pipes and minor losingss due to decompression sicknesss, valves, tees. To cipher these we will be covering with Reynolds figure ( for nature of flow ) , Moody diagram ( for clash factor ) and head loss computations.LosingssAs the fluid flows through the pipe there is clash at the pipe wall and unstable interface in the consecutive parts of the pipe due to interference between the fluid and the walls of the pipe. This clash consequences in consequences in the loss of energy in the lineat the disbursal of liquid force per unit area and the losingss are known as the major losingss. Pipe systems consist of constituents in add-on to consecutive pipes. These include decompression sicknesss, valves, tees etc and add farther to the losingss in the line. These losingss are termed as minor losses.Experimental information is used to cipher these losingss as the theoretical anticipation is complex.Major LosingssThe force per unit area bead due to clash in a grapevine depends on the flow rate, pipe diameter, pipe raggedness, liquid specific gravitation, and viscousness. In add-on, the frictional force per unit area bead depends on the Reynolds figure ( and therefore the flow government ) . Therefore, the fluid in the grapevine will undergo force per unit area losingss as it runs in the line and cut down the operating force per unit area. This loss needs to be recovered and to keep the force per unit area pumps are installed at specific locations harmonizing to the demand ( pumps are discussed in Chapter in front ) . These force per unit area losingss are calculated by ut ilizing the Darcy-Weisbach expressiona?† P = degree Fahrenheit ( L/D ) ( V^2/2 ) I?Where, f=Darcy clash factor, dimensionless, normally a figure between 0.008 and 0.10 L=Pipe length, foot D=Pipe internal diameter, foot The force per unit area loss for speed of 5ft/s comes out to be 9625.15psi. All the relevant computations are shown in appendix A.Minor LosingssReal grapevine systems largely consist of more than consecutive pipes. The extra constituents ( valves, tees and decompression sicknesss ) add to the overall loss of the system. These are termed as minor losingss. In instance of really long pipes, these losingss are normally undistinguished incomparison to theA unstable clash in the length considered. But in caseA of short pipes, these minor losingss may really be major losingss such as inA suction pipe of a pumpwith strainer and pes valves.These losingss represent extra energy dissipation in the flow, normally caused by secondary flows induced by curvature or recirculation. Minor loss in diverging flow is much larger than thatA in meeting flow. Minor lossesgenerally increase with an addition in the geometric deformation of the flow. Thoughminor losingss are normally confined to a veryA short length of way, the effects mayA notdisappear for a considerable distance downstream. ItA is undistinguished in instance ofA laminar flow. The force per unit area bead through valves and adjustments is generallyexpressed in footings of the liquid kinetic energy V2/2g multiplied by a head loss coefficient K. Comparing this with the Darcy-Weisbach equation for caput loss in a pipe, we can see the undermentioned analogy. For a consecutive pipe, the caput loss H is V2/2g multiplied by the factor ( fL/D ) . Therefore, the caput loss coefficient for a consecutive pipe is fL/D. Therefore, the force per unit area bead in a valve or adjustment is calculated as follows:h=K ( V^2 ) /2gWhere, h=Head loss due to valve or suiting, foot K=Head loss coefficient for the valve or adjustment, dimensionless V=Velocity of liquid through valve or adjustment, ft/s g=Acceleration due to gravitation, 32.2 ft/s2 in English units The caput loss coefficient K is, for a given flow geometry, considered practically changeless at high Reynolds figure. K increases with pipe raggedness and with lower Reynolds Numberss. In general the value of K is determined chiefly by the flow geometry or by the form of the pressureloss device. Minor loss is by and large expressed in one ofA the two ways In footings of minor loss factor K. In footings length, tantamount to aA certain length of consecutive pipe, usuallyexpressed in footings of figure of pipe diameter. The minor losingss for our system are calculated and consequence in a really low value and can easy be neglected.Reynolds NumberFlow in a liquid grapevine may be smooth, laminar flow, besides known as syrupy or streamline flow. In this type of flow the liquid flows in beds or laminations without doing Eddies or turbulency. But as the speed increases the flow alterations from laminar to turbulent with Eddies and turbulencies. The of import parametric quantity used in sorting the type of flow in the pipe is called Reynolds Number. Reynolds figure gives us the ratio of inertial forces to syrupy forces and is used to find the nature of flow utilizing the recommended speed and the internal diameter. Reynolds figure is given byRe = I?VD/A µFlow through pipes is classified into three chief flow governments and depending upon the Reynolds figure, flow through pipes will fall in one of the undermentioned three flow governments. 1. Laminar flow: R & lt ; 2000 2. Critical flow: R & gt ; 2000 and R & lt ; 4000 3. Disruptive flow: R & gt ; 4000Friction FactorFriction Factor is a dimensionless figure required to cipher the force per unit area losingss in the pipe. Trials have shown that degree Fahrenheit is dependent upon Reynolds figure and comparative raggedness of the pipe. Relative raggedness is ratio of absolute pipe wall raggedness I µ to the pipe diameter D. For laminar flow, with Reynolds figure R & lt ; 2000, the Darcy clash factor degree Fahrenheit is calculated from the simple relationshipf=64/RFor laminar flow the clash factor depends merely on the Reynolds figure and is independent of the internal status of the pipe. Therefore, irrespective of whether the pipe is smooth or unsmooth, the clash factor for laminar flow is a figure that varies reciprocally with the Reynolds figure. For turbulent flow, when the Reynolds figure R & gt ; 4000, the clash factor degree Fahrenheit depends non merely on R but besides on the internal raggedness of the pipe. As the pipe raggedness additions, so does the clash factor. Therefore, smooth pipes have a smaller clash factor compared with unsmooth pipes. More significantly, clash factor depends on the comparative raggedness ( I µ/D ) instead than the absolute pipe raggedness I µ . In the disruptive part it can be calculated utilizing either the Colebrook-White equation or the Moody Diagram.Colebrook-White EquationThe Colebrook equation is an inexplicit equation that combines experimental consequences of surveies of turbulent flow in smooth and unsmooth pipe The Colebrook equation is given as:1/a?sf = -2log ( ( I µ/3.7D ) + ( 2.51/Rea?sf ) )But the turbulent flow part ( R & gt ; 4000 ) consists of three separate parts: Turbulent flow in smooth pipes Turbulent flow in to the full unsmooth pipes Passage flow between smooth and unsmooth pipes For disruptive flow in smooth pipes, pipe raggedness has a negligible consequence on the clash factor. Therefore, the clash factor in this part depends merely on the Reynolds figure as follows:1/a?sf = -2log ( 2.51/Rea?sf )For disruptive flow in to the full unsmooth pipes, the clash factor degree Fahrenheit appears to be less dependent on the Reynolds figure as the latter additions in magnitude. It depends merely on the pipe raggedness and diameter. It can be calculated from the undermentioned equation:1/a?sf = -2log ( ( I µ/3.7D )For the passage part between turbulent flow in smooth pipes and turbulent flow in to the full unsmooth pipes, the clash factor degree Fahrenheit is calculated utilizing the Colebrook-White equation given above:1/a?sf = -2log ( ( I µ/3.7D ) + ( 2.51/Rea?sf ) )Moody DiagramThe Colebrook equation is an inexplicit equation and requires test and mistake method to cipher f.To provide the easiness for ciphering f scientists and research workers developed a gra phical method known as Moody diagram.The Moody chart or Moody diagramis a graph that relates the clash factor, Reynolds figure and comparative raggedness for to the full developed flow in a round pipe.In the diagram clash factor is plotted poetries Reynolds figure. The curves are plotted utilizing the experimental information. The Moody diagram represents the complete clash factor map for laminar and all disruptive parts of pipe flows. To utilize the Moody diagram for finding the clash factor degree Fahrenheit we foremost calculate the Reynolds figure R for the flow. Following, we find the location on the horizontal axis of Reynolds figure for the value of R and pull a perpendicular line that intersects with the appropriate comparative raggedness ( e/D ) curve. From this point of intersection on the ( e/D ) curve, we read the value of the clash factor degree Fahrenheit on the perpendicular axis on the left.Other Pressure Drop RelationsHazen-Williams EquationThe Hazen-Williams equation is normally used in the design of waterdistribution lines and in the computation of frictional force per unit area bead inrefined crude oil merchandises such as gasolene and Diesel. This methodinvolves the usage of the Hazen-Williams C-factor alternatively of pipe roughnessor liquid viscousness. The force per unit area bead computation utilizing the Hazen-Williams equation takes into history flow rate, pipe diameter, and specificgravi ty as follows:h=4.73L ( Q/C ) 1.852/D4.87Where, h=Head loss due to clash, foot L=Pipe length, foot D=Pipe internal diameter, foot Q=Flow rate, ft3/s C=Hazen-Williams coefficient or C-factor, dimensionless In customary grapevine units, the Hazen-Williams equation can berewritten as follows in English units:Q=0.1482 ( C ) ( D ) 2.63 ( Pm/Sg ) 0.54Where, Q=Flow rate, bbl/day D=Pipe internal diameter, in. Pm=Frictional force per unit area bead, psi/mile Sg=Liquid specific gravitation Another signifier of Hazen-Williams equation, when the flow rate is in gal/ min and caput loss is measured in pess of liquid per thousand pess of pipe is as follows:GPM=6.7547A-10-3 ( C ) ( D ) 2.63 ( HL ) 0.54Where, GPM=Flow rate, gal/min HL=Friction loss, foot of liquid per 1000 foot of pipe In SI units, the Hazen-Williams equation is as follows:Q=9.0379A-10-8 ( C ) ( D ) 2.63 ( Pkm/Sg ) 0.54Where, Q=Flow rate, m3/hr D=Pipe internal diameter, millimeter Pkm=Frictional force per unit area bead, kPa/km Sg=Liquid specific gravitationShell-MIT EquationThe Shell-MIT equation, sometimes called the MIT equation, is used in the computation of force per unit area bead in heavy petroleum oil and heated liquid grapevines. Using this method, a modified Reynolds figure Rm iscalculated foremost from the Reynolds figure as follows:R=92.24 ( Q ) / ( DI? )Rm=R/ ( 7742 )Where, R=Reynolds figure, dimensionless Rm=Modified Reynolds figure, dimensionless Q=Flow rate, bbl/day D=Pipe internal diameter, in. I?=Kinematic viscousness, Central Time Than depending on the flow ( laminal or turbulent ) , the clash factor is calculated from one of the undermentioned equations:f=0.00207/Rm ( laminal flow )f=0.0018+0.00662 ( 1/Rm ) 0.355 ( disruptive flow )Finally, the force per unit area bead due to clash is calculated utilizing theequationPm=0.241 ( f SgQ2 ) /D5Where, Pm=Frictional force per unit area bead, psi/mile f=Friction factor, dimensionless Sg=Liquid specific gravitation Q=Flow rate, bbl/day D=Pipe internal diameter, in. In SI units the MIT equation is expressed as follows:Pm=6.2191A-1010 ( f SgQ2 ) /D5Where, Pm=Frictional force per unit area bead, kPa/km f=Friction factor, dimensionless Sg=Liquid specific gravitation Q=Flow rate, m3/hr D=Pipe internal diameter, millimeter

Development Of Coronary Heart Disease Health And Social Care Essay

In this essay I will debate about the relationship between high blood pressure and type 2 mellitus diabetes ( T2DM ) . Hypertension has a taking factor to play in cardiovascular diseases ; high blood pressure and diabetes affect the vascular tree. Hypertension is a long lasting status which makes the blood force per unit area rise above the normal norm, 90 % of high blood pressure is indispensable they can be classed as two different types primary and secondary, when you get high blood force per unit area because of other factors such as the kidneys or tumours this is known as secondary high blood pressure. Type 1 Diabetes is when your organic structure fails to bring forth insulin and requires insulin to be injected. Type 2 diabetes is when the organic structure is n't utilizing insulin in a correct and most efficient manner. Atherosclerosis vascular disease is besides known as coronary artery disease ; this is the thickener of the arterias and builds up of fat stuffs like cholester in. Connery bosom disease is when there is a obstruction in your Connery arterias because of fatty acids and stops the blood being pumped around the organic structure. The major factor to shots and bosom onslaughts is due because of relentless high blood pressure. From the NHS web site I can find that Connery bosom disease is the biggest slayer in the UK, at least 300,000 people dice of Connery bosom disease every twelvemonth impacting 1 in every 4 work forces and 1 in every 6 adult females. From the national UK nose count they say that the most common cause for the past 90 old ages has been Connery bosom disease, see table 1.1 ( from the tabular array you can see that in merely England and Wales disk shape disease is the most common. As age increases the opportunity of acquiring Connery bosom disease increases every bit good this is because of your immune system non working every bit good and because of the unhealthy life style being lived with non adequate exercising.Table 1.1Connery bosom disease occurs when the Connery arteries subdivision of from the chief aorta this is merely above the aortal valve, when fatty acids build up in the blood vas walls and shorten the transition manner of the blood to flux through. From the NHS web site I can find that Connery bosom disease is the UK biggest slayer, around 300,000 people have a bosom onslaught each twelvemonth there is about 1 in 6 adult females deceasing from the disease and around 1 in 4 work forces. Connery bosom dis ease when there are big sums of cholesterin in your organic structure this can besides take to atherosclerosis. In the US these figures are a batch higher the hazard of holding |CHD over 40 is 49 % for work forces and 32 % for adult females there has been a lessening in the figure of deceases from CHD for people aged 65 and under. But for people over the age of 65 there is a lessening in the figure of people deceasing from CHD but it is well more that people aged 65 and under. This is due to the life manner people have changed over the old ages. CHD decease rate as a per centum of 1980 rate among work forces and adult females aged 55-64 old ages in England and Wales ‘s clip span of 1980-1995 Type 2 diabetes can be genetically inherited non all is bad, some of them are good heritage they help forestall type 2 diabetes. A major factors for diabetes is obesity, from my statistics I can see that the national Centre for the wellness shows us that there is around 60 million corpulent people, this is because there is a higher hazard of insulin opposition because it interferes with the organic structure to utilize the insulin. The figure of kids with type 2 mellitus diabetes has besides increased. 90 % of people that have been diagnosed with type diabetes were overweight. There is excessively much fat in the organic structure and there is non adequate fiber and simple saccharides these all aid to the diagnosing of diabetes. Eating good and right can change by reversal these reactions and they can forestall type 2 diabetes. Peoples who have household diagnosed with type 2 diabetes have a greater hazard in developing it themselves. African Americans have a familial temperament tow ards type 2 diabetes. Age besides has a large part. FIG 1.2 Diabetes is when there is an addition in glucose and it rises above the normal degree, type 2 diabetes can besides be inherited genetically non wholly inherited diabetes is bad because some aids to forestall diabetes. From the national wellness statistics I can see that there is around 60 million corpulent people, fleshiness has a immense contributing factor to diabetes, the larger a individual is the higher the opportunity of the insulin being wasted and insulin opposition, type 2 diabetes increases the opportunities of a cardio vascular bosom disease this is due to your bosom working harder to get the better of the little sums of glucose being turned into glucose. If there is high degree of glucose or even if there is non plenty in your organic structure for a long period of clip this can damage the blood vass and can take to bosom onslaughts, shots and hapless circulation. Atherlersiosis is a status that hardens the arterias ; the arterias are blood vessles which carry rich O blood around your organic structure. The arterias harden due to the physique up of plaque this causes them to contract over clip and because of the arterias being narrowed there is less blood being pumped around the organic structure and to your bosom. The Plaque inside the Connery arterias is made up of fat, Ca and cholesterin, this status is known as coronary artery disease. This status causes the arterias to lose they elasticity ; this restricts the blood flow and causes high blood pressure which is addition of the blood force per unit area. This makes the arterial force per unit area to increase and causes the bosom musculus to work twice every bit difficult to pump the sum of blood a normal bosom would pump, these lending factors could take up to hold shots or even bosom onslaughts. Atherelerosis development is foremost when the fatty run is followed by the formation of plaqu e and so characterised of the increasing sum of macrophage and froth cells. Looking at FIG 1.3 you can see that A is a healthy arteria that would pump blood around the organic structure without a job, but from B you can see that there is a build up of plaque and this arteria would hold problem pumping blood about. Many people that have this status are incognizant but merely happen out after they have had a shot or a bosom onslaught, the chief intervention that is used for atherlerosis is to alter your life style, there are medical interventions and medical specialties that you can take to assist populate a healthier life style. Type 11 mellitus diabetes ; high blood pressure is linked together and all lead up to impacting the bosom. Age has a major function to play as this is an uncountable factor by acquiring one of these status e.g. high blood pressure this may take to atherlerosocis. All 3 conditions play a major function in impacting the bosom and barricading the blood vass. First if type 11 mellitus diabetes is developed and non looked after and controlled the sum of glucose will lift, as the glucose rises this puts force per unit area on the kidneys to increase their working rate to interrupt down the glucose and halt it from developing into cholesterin. When there is a build up of glucose and the is excessively much strain on the kidneys they begin to neglect and can non maintain up and this leads to cholesterol being deposited into the blood vass, as above in FIG 1.3 as cholesterin is deposited into the blood vass this leads to the physique up of plaque and eventually leads to atherolerosis. This ca uses the blood vass to halt working decently as it has restricted the blood flow, this changes the manner the blood is flowed through the arterias and leads to high blood pressure. Atherlerosis is the major cause of Hypertension. Hypertension has a prima function to play to Connery bosom disease this is the blood vass are already strained by the physique up of plaque and high blood pressure increases the strain which causes the blood vass to rupture and rend. The force per unit area builds up in the blood vass and the blood is filled in the cryings which cause coagulums and this leads to Connery bosom disease. The best manner in commanding conary bosom disease and handling it is to keep a healthy life manner. By commanding emphasis degrees will assist forestall high blood pressure, seeking to avoid emphasis and nerve-racking state of affairss and maintaining a positive head. Exerting on a regular basis helps the variety meats to work decently the NHS say at least 4-5 per hebdomad for exercising is required. To drop cholesterin degrees eating a balanced diet with at least 5 parts of fruit and vegetable and cutting back on fatso nutrients and saccharides. Eating meats in moderate parts will besides assist. Cuting back on tea, java and intoxicant can assist cut down the physique up of plaque and atherlerosis. Stevens, RJ et Al 2005 says A glass of ruddy wine daily is good for the bosom. Drug intervention for conary bosom disease is different for each person as the physicians prescribe you medication on your life style and side effects. Low doses of acetylsalicylic acid could be given as this helps to forestall blood curdling and reduces the hazard of bosom onslaughts. ACE inhibitors could be taken these aid to handle high blood force per unit area besides known as high blood pressure, this causes the blood vass to loosen up and widen and assist to take down the blood force per unit area. The drugs nitrates may besides be used this helps to forestall thorax strivings and besides widens the vass. To assist command cholesterin degrees a statin drug is used these types of drugs are merely prescribed after the non-drug interventions described as above have all been extinguished this drug helps to forestall shots and bosom onslaughts. The chief types of drugs that are used to assist handle conary bosom disease are lipid-lowering medicines and ACE inhibitors. hypertext transfer protocol: //www.nhs.uk/conditions/Coronary-heart-disease/Pages/Introduction.aspx hypertext transfer protocol: //www.healthcentral.com/heart-disease/drugs.html