The term illumination Essay Example for Free

The term glimmer EssayIn metaphysics refers to an ineffable state of experience or communion with a godhood or an absolute sublime. Because the state of illumination is, by nature, a deeply subjective experience, the quantification or definition of the state is difficult to accomplish through traditional expository methods or scientific investigation. Illumination is a desired state for mystic who maintain the pr mapice of putting oneself into, and remaining in, manoeuver relation with God, the Absolute, or any unifying principle of life. Mysticism is inseparably linked with religion. Because of the nature of mysticism, firsthand objective studies of it atomic number 18 virtually impossible. (Mysticism, 2004) Rather, what can be known, second-hand, about the illuminative state is gleaned through the expression of mystics,artists, poets, and writers who express their subjective apprehensions through various means, often utilizing complex and mythologically driven symbolic s ystems of reference. The language of mysticism is eternally difficult and usually symbolic. This is readily seen in the Song of Songs in the Old Testament, in the book of Revelation in the New Testament, and in the writings of William Blake.Mystics, oddly those of the Roman Catholic and the Islamic traditions, have made use of a terminology borrowed from ordinary human love. (Mysticism, 2004) In many cases, illumination is closely affiliate with established mystical traditions (as in Zen Buddhism) and also with established religious traditions (such as Roman Catholicism). In all cases, illumination is regarded as a quality on the road to union with God or the ideal, but non a conclusion or attainment of the goal in and of itself.In this regard, illumination stands closely in hand with another mystical state known as purgation where the soul on a lower floorgoes a painful cleansing of its impurities in hostel to enter into union with God or the ideal. Illumination can be Illu mination page -2- regarded, metaphorically, as the light which shines through the cleaned window of the soul, as it has been percipient through the purgative state. The two states are seen as continuing and sometimes overlapping.(Mysticism, 2004) The basic pattern for the path to mystical union with God or the ideal can be generically rendered, although the specific differ widely throughout geographic and ethnicly specific traditions and beliefs. At the core of the mystical journey, involving issues of illumination, several identify archetypal aspects can be cited The soul undergoes a purification (the purgative way), which leads to a feeling of illumination and greater love of God after a period the soul may be said to enter into mystical union with God an ecstatic state to a final perfect state of union with God. (Mysticism, 2004) The fulfill above is quite worldwidely envisioned and the above description is probably as close to anything like an objective account of what m ystical experience is and what its goals are the illuminative feeling indicates that the mystic has successfully enjoined the path to union with God or the ideal. However, it is not the final union with God or the ideal and its ecstacy are not particularly connotative of what mystics have imagined the final union with God or the ideal to be, once actually attained.Rather, illumination is a state of awareness and friendship that blossoms from mystical communion with God or the ideal. It is not a linear cognitionWe have illumination which is no mere deduction from previous knowledge but the illumination is at the same time like a leap of recognition. This may throw some light on the problem we notice earlier the relation between faith described in terms of the energizing of the Holy Spirit, and mans efforts of reason. (Emmet, 1945, p. 133).Illumination page -3- The distinction between ordinary understanding and mystical illumination is an valuable one, for knowledge that is deri ved by linear reason is often interpreted by humanity as an achievement of humanity alone, whereas illuminative knowledge gleaned from communion with God or the ideal often comes like a bolt out of the blue and transcends not solitary(prenominal) individual ego, but racial, national, and cultural biases as wellThus the community whose way is defined by Torah looks to the moment when Moses stood on Sinai the Christian Church sees its life as continuing Gods act of reconciliation Prophet as the community of the faithful, committed to God in submission to the stark majesty of His Transcendence Buddhists look to the moment of illumination under the Bo tree, when Buddha saw the way of release from the restlessness of finite existence. (Emmet, 1945, p. 156).Just as scientific or other types of linear knowledge may cast world-changing ideas or technologies into the flow of history, the mystical tradition reminds humanity that we are all united in the truths of the highest ideals, in the l ove of God. Illumination often transports the mystic not only to euphoric feelings of ecstacy, but important realizations about the nature of human existence and how human tragedy and pain can be minimized and sometimes overcome.From important illuminations come new ways of living in relation to the transcendent, which have given form to new ways of feeling and of thought. These were not reached by general reflections on the general character of experience but born out of the devotion of individual seekers who looked inward to find the illuminative power and phenomena which every mystic believes emanates at a time from God or the ideal. (Emmet, 1945, p.156).The verifiable impact of religious and philosophical movements and doctrines that began in the subjective state if illumination are evidence that illumination represents a bear on of human reason and knowledge which is as important as linear modes.References Mysticism. (2004). In The Columbia Encyclopedia (6th ed. ). New York C olumbia University Press. Emmet, D. M. (1945). The Nature of Metaphysical Thinking. capital of the United Kingdom Macmillan Co. Ltd.

European Continent in the Industrial Revolution Essay Example for Free

European Continent in the Industrial Revolution actHistorians are divided into various schools of thoughts on the issue of causes of imperialism. There are many opinions favouring all possible options. The biggest reason cited has been the economic dominance. The rapid industrialization of the European Continent in the Industrial Revolution created an unprecedented economic advantage between Europe the areas which later on became their colonies. This economic differential can be argued to be the lead cause of the European quest for colonization.However Industrialization related economic advantage was not the only single reason wherefore some countries choose to become Colonial masters. This process was greatly facilitated by the highly developed bureaucratic system of administration in Europe vis-a-vis the Africa and some what Asian colonies. If economic advantage was the fuel which caused the Imperialism and Colonialism to grow, bureaucracy was its engine and the driver was the third generally cited reason i. e. racial supremacy theories of the times.Europeans believed themselves to be a superior race having a superior religion destined to rule the world forever. Probably it was the degree of all the three factors combined that decided which states pursuer the colonization aims more vigorously than other. If only one element was missing or a shade lower than its counterpart, its success ratio in colonizing upper limit area was also lower. Therefore it was the combination of these three factors which decided the ratio of successful Imperialism in Europe.Reference ListEmpire and Imperialism-Europe retrieved from Internet on 05/09/07 from http//science.jrank.org/pages/7654/Empire-Imperialism-Europe.html

P2 Cycle in WDM Networks

P2 Cycle in WDM interlocksP2-CYCLE IN WDM NETWORKSM.DILEEP Smt K .APARNAAbstractThe Failure Indep discontinueent Path protective cover (FIPP) p cycle is effectual arrangement. If failure occurs in pre configured cycle it is surety is reconfigured amidst those two nodes. In this motif we use Parasitic Protection Links (PPL). PPLs atomic issue forth 18 p-cycles with have attached links. PPLs argon used to protect the non only failure nodes but it connected to PPL to cycle. P2 cycle is known as p cycle with parasitic shield links.We address The P2 cycle in interlock profits fecal matter be analysed by employ single link failure. We further advise two P2-cycle based heuristic algorithmic rules, morose Routing Protection (SRP) and Flexible Routing Protection (FRP), to address the projectile dealings case. In the kinetic case, both SRP and FRP outperform FIPP p-cycle outlines in terms of cylinder block probability in most scenarios considered. In general, the P2-cycl e auspices scheme outperforms the p-cycle based in terms of electrical condenser efficiencies which being slightly sulky in terms of traffic recuperation speed.Key words Parasitic Protection Links (PPL), Strict Routing Protection (SRP), Flexible Routing Protection (FRP).I. INTRODUCTIONNetwork survivability, defined as the Continuous operations of network are performed in case failure occurred in the network 3. In generally ocular networks die hard information in terabytes. A failure in network causes lot of loss of data. Ring based networks can easily come due to their organise and fast recovery management. In rebound based it takes 50-60ms but it gives capacity redundancy high. As mesh based networks emerged, more capacity efficient surety schemes were proposed which allow backup capacity sharing. These schemes are into three categories link-based, segment-based and trail-based 29.Link-based protection schemes produce the fast traffic recovery speed but suffer from the wo rst imaging efficiency .Best resource efficiency is achieved by driveway based protection scheme. Shared Backup Path Protection (SBPP) is one of the style protection schemes. it is high capacity. upon a network failure. It takes long time o recover from traffic. Segment based protection schemes lie between the link-based and path-based schemes, and offer a let out combination of bandwidth efficiency and recovery time.Path-based protection schemes usually achieve the best resource efficiency. Among them, a path protection scheme, namely, Shared Backup Path Protection (SBPP), was shown to be the most capacity efficient protection scheme 8. However, it suffers from long traffic recovery time upon a network failure. Segment based protection schemes lie between the link-based and path-based schemes, and offer a infract combination of bandwidth efficiency and recovery time .The pre-configured protection cycle is known as p-cycle, combines the good qualities of mesh and ring based pro tection schemes and achieves the recovery speed of ring- based with the capacity efficiency of mesh protection. P-cycle has been proven theoretically to be the most efficient pre-configured protection scheme in terms of capacity efficiency and recovery speed .II. Dynamic Traffic ScenariosIn dynamic traffic without the prior knowledge of r separatelying time of future requests. Due to the pre-configuration property of traditional p-cycles, it is extremely difficult to re- provision all the protection cycles whenever a sassy school term arrives in battle array to minimize overall cost. distributively provisioning takes large computation cost and complex network reconfiguration. Therefore, most of the work in the literature assume that established p-cycles should not vary with time or traffic. The authors in proposed three different routing algorithms along with link-based p-cycle protection scheme to deal with dynamic traffic. The results indicate that the proposed p-cycle based design performs give away than SBPP in dense networks but worse in lean networks. Protected Working Capacity Envelopes (PWCE) is another method to address dynamic traffic scenarios. It divides the finished network into two partitions working and protection. Both static and dynamic traffic can be accommodated as long as the total traffic do not exceed the limit of working envelopes.Although some decent results have been shown in the literature, p-cycles still have such intrinsic weakness in traffic with dynamic traffic. If an inflowing session whose end nodes do not lie on any cycle, it cannot be protected and a immature cycle has to be constructed to protect this session, or the exist cycles must be reconfigured. An example shown in somaure 4.2 illustrates such weakness and withal reveals the advantage of P2-cycles. In figure of speech. 4.2(a), session1 has been provisioned and protected by cycle C1(ECBFE). As session 2 arrives, the unproblematic path of session 2 is prov isioned as P2(ABCD). Under FIPP p-cycle scheme, cycle C1 cannot protect it and thus a new cycle C2(ABCDEFA) is constructed to protect it as shown in Fig.4.2(b). However, instead of building a new cycle, using P2-cycle approach we can add two PPLs (A,F) and (D,E) to connect the end nodes of P2 such that C1 can also provide a protection segment (AFED) for P2 as shown in Fig.4.2(c). Therefore, both sessions are protected by a P2-cycle with much(prenominal) less cost.Fig 1 P2-cycle deals With Dynamic TrafficIII. Problem StatementIn dynamic traffic scenarios, a WDM mesh network is given with network resources, such as the maximum number of wavelengths and the cost on to each one span. Each traffic request arrives to the network in a dynamic appearance such that it needs to be considered individually based on the current network status. The network status consists of the percentage pointed working and avail up to(p) wavelengths on each span as well as all the accepted sessions and P2- cycles provisioned in the network.Given a network modelled as an undirected interpret G = (VE) where each undirected span e2E has a cost ce, the current network which includes the currently used and available wave- lengths on each span e, each accepted session l and their protection P2-cycles. Provision incoming unicast sessions against any single-link failure with the minimal overall blocking probability by using P2-cycle scheme. The assumptions required in this dynamic traffic case are the same as that in the static case.We design two heuristics to address the dynamic traffic case. In the first method, named Strict Routing Protection (SRP), the uncreated and protection path for each incoming session are computed separately. The primary path is firstly provisioned using Dijkstras shortest routing algorithm. Based on the primary path, either an existing P2-cycle or a new cycle is found to protect it. In the second method, named Flexible Routing Protection (FRP), the primary and p rotection paths of an incoming session are constructed jointly. The existing P2-cycles entrust be preferred to being used first. If no existing one is able to protect the session, a new cycle will be formed. We allow spare capacity sharing between different sessions to increase the capacity efficiency.A. Strict Routing Protection (SRP)The motivation of SRP is to everlastingly choose the shortest path to route the primary traffic in order to leave more spare capacity for protection, since the capacity used for primary path cannot be shared among different sessions. And then we check whether any available P2 cycle can be exploited to protect this newly established session. formerly being set up, the cycle for a P2-cycle cannot be changed.The protection links that are added to PPLs are one skim away from end nodes. The detail of the algorithm SRP described in following steps1. As a new session dl(sl tl) arrives, establish the primary path fl between sl and tl downstairs current ne twork status by using Dijkstras algorithm. If it fails, the session is blocked2. Sort all the existing P2-cycles, cp C, in the change magnitude order of (dl cp), which is One hop indicates that there exists a span in the network that connects a node to the cycle. If (dl cp) = infinite 1 for all cp C, then no existing cycle is able to protect this new session. Thus, a new cycle needs to be constructed to protect dl.3. For each existing protection cycle, cp, we construct a temporary graph G0, consisting of only the cycle spans of cp and all the spans connecting the source and destination nodes of l to the cycle . All the spans used by fl should be removed to ensure that its protection path is link-disjoint. Then, all the sessions protected by cp are checked and if an existing session in D can share the same cp with the new session l, we should energise sure that either their primary paths or their protection paths are link-disjoint. we remove the protection paths of all the sess ions in D whose primary paths are not link-disjoint with fl. If a protection path can still be found in the remaining G0 this protection path will be ql for l. Accordingly, the protection cycle is also determined, which should be updated if some PPLs are also used.4. If every existing cp fails to protect dl, a new cycle will be constructed to protect it. We first strain to find two diverse paths to form a cycle that is link-disjoint to fl. If such cycle cannot be found, then we find a path, ql, link-disjoint to fl and the cycle is formed by combining ql with fl.B. Flexible Routing Protection (FRP)Different from SRP, the flexible routing protection scheme considers primary and protection paths jointly for each arriving session. Instead of determining the primary path in advance, we examine each existing P2-cycle and find each potential protection path along the cycle that can connect the source and destination. For each potential protection path, we try to discover a primary path fo r it. If it succeeds, the session is accepted. Otherwise, a new cycle is constructed to protect the session.Flexible Routing Protection (FRP) contrivanceAlgorithm FRP is explained in following stepsGiven a new session dl(sl tl), all the available P2-cycles cp C are sorted in the increasing order of (dl cp).For each available cp, list all the realistic protection paths for dl. If the end nodes sl and tl are on the cycle, there are two possible segments along the cycle. If sl or(and) tl is not on the cycle, the path will be composed of parasitic links connecting sl or tl to the cycle and an on-cycle segment. We assume the intermediate node peak in a given network is denoted by . Each cycle can provide two on cycle segments between any pair of on-cycle nodes. Each end node, sl or tl, can be connected to the cycle by at most PPLs given the node degree . Hence, the average number of candidate protection paths provided by any P2-cycleFor each candidate ql, run Dijkstras algorithm t o find a primary path fl in G that is not only link-disjoint to ql but also link-disjoint with other primary paths protected by the same cycle if their protection paths are not link-disjoint. If it succeeds, we investment firm the combination in a temporary set T, which is initialized as . After checking all the existing P2-cycles, we check set T and find the combination with minimum cost of fl. We recover the spans removed from G and update the network status. If no existing P2-cycle can be used to protect session dl, we use Bhandaris algorithm to find two link-disjoint paths between si and ti to form a new P2-cycle. If it fails, the session is blocked. Otherwise, the session is accepted and one of the paths (usually the shorter one) is used as the primary path fl, and the network is updated.IV. Results for Dynamic TrafficBased on two P2-cycle protection algorithms, SRP and FRP, proposed for provisioning dynamic requests, we conduct a simulation study to compare the proceeding of these algorithms under dynamic traffic. The networks used in the simulations are NSFNET, COST239 and USNET, in which USNET network, shown in Fig. 2 has 24 nodes and 43 edges and the average node degree is 3.58.Fig.2 USNET(24 nodes, 43 edges)In each simulation run, 1000 randomly generated unicast requests are loaded to the network sequentially and the reject ratio is recorded. The arrival of traffic follows Poisson distribution with requests per second and the sequence of an accepted connection is exponentially distributed with a mean of . The traffic load measured in Erlangs is Each connection requires an entire wavelength to transmit the traffic. The maximum capacity on each network link is set to 16 wavelengths.Figures 3,4,and 5 show the blocking probability of dynamic traffic using SRP, FRP and FIPP p-cycle in NSFNET, USNET and COST239 networks, respectively. Each point in the figures is the average value of 200 simulation runs for each traffic load. For FIPP p-cycle scheme , the primary path of each arriving connection is provisioned first by using Dijkstras algorithm, and then protected by a p-cycle.Fig 3(a)Comparison of blocking probability in NSFNET(W=16)Fig 3(b)Comparison of blocking probability in COST239(W=16)Fig 3(c)Comparison of blocking probability in USNET(W=16)The results show that both SRP and FRP achieve lower blocking probability than FIPP under most of the network scenarios. In NSFNET, SRP achieves rectify performance than the other two schemes. In USNET, FRP outperforms SRP and FIPP under every scenarios. In COST239, however, SRP and FIPP achieves the same session blocking ratio, which is better than FRP, when the traffic load is relatively low. As the traffic load increases where the network is very saturated, FRP turns to perform better than SRP and FIPP.Based on the results, SRP performs better than other two schemes in relatively small and sparse networks at a low level of traffic load. FRP achieves the best performance in larger and denser networks, especially when the network is very saturated. One of the reason that SRP performs better in small and sparse networks, such as, NSF, is that to provision a session endlessly using the shortest path will save some capacity for protection in a long run. Hence, more capacity can be used for protection such that more cycles can be established. in a network with high nodal degree, a cycle is more likely to reach a large group of nodes compared with a sparse network. In this case, FRP has a higher(prenominal) chance to protect a given session by using existing P2-cycles when network load is very high and the network is over saturated.Fig 4(a).Comparison of NOR in NSFNET(W=16)Fig 4(b).Comparison of NOR in cost239(W=16)Fig 4(c).Comparison of NOR in USNET(W=16)We also studied the average NOR of each accepted connection as in dynamic traffic scenarios and the results are shown in Figures 4(a),4(b) and 4(c). As expected, FIPP achieves the best solution with exact two nod e reconfigurations for each connection. Meanwhile, SRP also performs better than FRP in three networks. This reveals that connections protected by FRP use more PPLs than those used by SRP, which follows from the basic concept on which the two algorithms are based. It is worth noting that the average NOR achieved by SRP is almost stable on a lower floor 2.4 in NSF and USNET and 2.7 in COST239. This indicates that most of the connections only need two no reconfigurations upon a network failure, especially in NSF and USNET. FRP has larger average NOR because it iterates every existing p-cycle in the network to protect each session and choose the one with minimum cost but not the one with minimum NOR. Shorter primary paths always results in longer protection paths such that more PPLs are used to protect each session.Therefore, based on the simulation results, SRP and FRP both achieves the lowest blocking probability than FIPP in most of the network scenarios considered and each scheme h as advantage over the other in different network scenarios. SRP has better failure recovery performance than FRP. In dynamic traffic scenarios, the P2-cycle protection scheme is faster protection scheme provides an enhancement of capacity efficiency over the FIPP p-cycle with asmall change in the recovery time.VI. ExtensionThe p2-cycles can be extended to link failures can be obtained. If one node can be failed then the data will be passed through alternative paths to reach to the destination. The p2 cycle can be defined as the original p-cycle The protection links that are added to PPLs are one hop away from end nodes. For p2-cycles the network data can be efficiently transferred to destination which is one hop away from the nodes.V. ConclusionsIn this paper new p cycle protection is done in mesh based protection networks. By using the parasitic protection links (PPL), FIPP p-cycle can be extended through paths from end nodes which are one hop away from the failure nodes of p cycle s. In dynamic traffic scenarios., in dynamic their are two algorithms are proposed Strict Routing Protection (SRP) and Flexible Routing Protection (FRP), to handle dynamic traffic demands in order to minimize the total number of blocked sessions.In dynamic traffic case the blocking probability less by using algorithms SRP and FRP comparing with FIPP p cycles. The numerical results shows the P2-cycle protection scheme is a more highly capacity efficient than the Failure Independent Path Protection p-cycle scheme in dynamic traffic case. the P2-cycle protection scheme is a more effective alternative of existent p-cycle-based and path-based protection schemes, Considering the factors of capacity efficiency and recovery speedReferencesD. Zhou and S. Subramanian, Survivability in optical networks, IEEE Networks, 2012P. Arijs, B. V. Caenegem, P. Demeester, and P. Lagasse, Design of ring and mesh based WDM transport networks, Optical Networks Magazine, vol. 1, no. 3, pp. 27-41, 2011.S. Ram amurthy and B. Mukherjee, Survivable WDM mesh networks. Part I-protection, in Proceedings of IEEE INFOCOM, vol. 2, pp. 744-751, 2011.S.krishna Survivable WDM mesh network,, vol. 21, no. 4, pp. 870-883, 2009.P. H. Ho and H. T. Mouftah, shared protection for optical networks,IEEE Communications Magazine, pp. 97-103, February 2002.Bharat T. Doshi, Subrahmanyam Dravida, P. Harshavardhana, Oded Hauser, and Yufei Wang, Optical Network Design and Restoration, Bell Labs Technical Journal, JanuaryCMarch 1999Caihui Ou, J. Zhang, H. Zhang, L. H. Sahasrabuddhe and B. Mukherjee, New and Improved Ap-proaches for Shared-Path Protection in WDM Mesh Networks, IEEE Journal of Lightwave Technology, VOL. 22, NO. 5, MAY 2004Dahai Xu, Y. Xiong and C. Qiao, invention algorithms for shared-segment protection, IEEE Journal of Selected Areas on Communications, v21. p1320-1331, 2003Janos Tapolcai and et al. A New Shared Segment Protection Method for Survivable Networks with Guaranteed Recovery Time, IEEE Tra nsactions on Reliability, Vol. 57, pp. 272-282, 2008.W.D D. Stamat, Next Generation networks, in Proc. IEEE ICC 98, 1998, pp. 537-543

Problem Solving Creative Thinking And Decision Making

Problem lick Creative intellection And Decision MakingProblem solving is a skill. Managers and leaders spend much of their era solving lines and making decisions. The nature of the difficultys loafer be small, large, complex or simple and its the role of the film director to establish an get guttle to resolving the enigma. Being approach with conundrums often results in people becoming uncomfortable and afraid, trying to find a solution immediately with appear analyzing the riddle and lifeing for someone to blame.Problems occur every(prenominal) day and flocknot be escaped. It should be viewed as opportunities to improve systems and relationships within organisations. The tendency to try and find a solution immediately is one of the fundamental mistakes in worry solving as the solution should be founded at the end of the process rather than at the beginning. Using an approach t get into worked previously can provide you solving the same problem over and over again .We are born problem solvers and build our confidence when we solve problems. Having a good process and approach to problems can solve them quickly and effectively.2. Problem Solving and Decision Making FrameworkOrganisations struggle with inherently the same problems year after year. The lack of a comprehensive and structured process is the reason for this failure. An organized approach using simple principles and a clear defined approach can facilitate persistent solutions. The 7 footmark problem solving process is an effective problem solving process that consists of a sequence of sections that fit together. Within individually section, in that location are various tools that can be used to work through the problem and find out what is really going on. It is useful to have such(prenominal) a structure to ensure that nothing is overlooked.Figure 7 Step Problem Solving Process2.1 settle/Identify the ProblemAt this point, people react to what they think the problem is. Instead , we should awaitk to understand more about why we think there is a problem. It is imperative to deal with the real problem and not the symptoms.With input from yourself and others, a serious of questions on the problem should be addressed. Use the 5 Ws and an H to collect statistics on the problema) What can you turn over that causes the problemb) Where does it occurc) When is it happeningd) Why is it happeninge) With whom is it happeningf) How is it happeningAt this stage, a problem statement should be developed and written megabucks. This allow for ensure that you are tackling the actual problem and not a side issue or part of the problem. A problem clearly stated is a problem half solved. (Dorothea Brande). Writing the statement pass on ensure that everyone can quickly understand what the problem is. The problem can be re-phrased as a goal objective. This provides a focus and direction for the problem-solvers that is measurable.The problem statement should also attempt to h ave a target date identified and scoped so that it can be realistically tackled.2.2 Analyse the ProblemIn this stage of the problem solving, critical input from people who have noticed the problem and who are effect by the problem should be gathered and sifted. The problem needs to viewed from a variety of viewpoints. Several questions should be asked to gather the required information What is the history of the problem? How long has it existed?How serious is the problem?What are the causes of the problem?What are the effects of the problem?What are the symptoms of the problem?What methods does the team already have for dealing with the problem?What are the limitations of those methods?How much freedom does the team have in gathering information and attempting to solve the problem?What obstacles keep the team from achieving the goal?Can the problem be divided into sub problems for definition and analysis?Understanding where the problem is arising from, its fit in the current victi misation and what the current environments are, is critical when working out if a solution leave behind work or not. The problem definitions validity can be checked here by stepping back and assessing the current feature and what needs to be changed. The cause of the problem should be written down in terms of what is happening, where, when, how, with whom and why.2.3 Generate Possible SolutionsAt this stage, the team and yourself should generate a spell of possible solutions. No evaluation of the solutions should occur but rather the effort should be concentrated on generating as many solutions as possible. heterogeneous techniques can be used to solve problems.2.3.1 BrainstormingThis is a technique designed to attend a stem generate several creative solutions to a problem. It is focussed on developing imaginative and innovative solutions. It is a simple means of generating a large outlet of psyches from a group of people in a short space of time.StepsA groups members are pr esented with a problem and all its details.Members are encouraged to come up with as many solutions as possible, putting aside all personal judgments and evaluations. Piggy-backing off another persons idea is useful.All ideas are recorded so the whole group can see them.Ideas are evaluated at another session.2.3.2 Reverse BrainstormingReverse brainstorming uses a combination of the reversal technique and brainstorming. This technique involves starting with twain reverse questionsa) How could I possibly cause the problem rather than How do I solve or prevent this problem?b) How could I possibly come upon the opposite effect rather than How do I achieve these results?Brainstorm the reverse problem to generate reverse solution ideas. The ideas should be allowed to flow. No idea should be rejected. The ideas from the reverse problem should now be reversed for the original problem.2.4 Analyse the SolutionsThis stage is where you investigate the various factors about to each one of the potential solutions. The good, the noisome points and other relevant items to each solution is noted. There are several ways to evaluate the chosen solutions, and writing them all down entrust help the group to choose the best solution to the problem.a) Making a T-Chart to Weigh the Pros and Cons of Each IdeaThe T-graph can be used where team members write down the advantages and disadvantages for each solution. This method leave illustrate the strengths and weaknesses of each solution.b) Develop and Assign Weights to CriteriaAll the criteria people are thinking about should be listed and weighted. This way, all group members are clear as to what criteria others are using.c) Prioritize the CriteriaThe neighboring step is for the group to agree on how important these criteria are in relation to each other. For example, is cost the most important criterion, or low resistance by others, etc. The criteria should then be rated in terms of importance. Assign a number to each criterio n so that all criteria together total 100.d) Rate Proposed Solutions Using CriteriaUsing the four to six possible solutions, score (on a home of 1 to 10) each solution against each criteria. Repeat this for each criterion. Multiply this score to the weighting, then add the weighted scores for each solution. This exercise will help compare alternatives objectively.2.5 Select the best SolutionThe various influencing factors for each possible solution is reviewed and solutions are kept or eliminated. The group should be relate with whether or not the solution chosen solves the problem or just minimizes it. The solution must be workable in relation to the problem. During this step, decisions need to be made. Weighting of the previous step can be used to select the best solutions.The T-chart can be reviewed for advantages and disadvantages. The facts and information gathered must be accordant with the proposed solution. Solutions can be voted for and then those can be shortlisted. Sho rtlisted items can be analysed and further refined and voted on. There is a possibility that no solutions may work. The problem may need to be re-evaluated or generation of solutions may need to be re-visited. This possibly the result of a problem definition that is not intumesce defined.2.6 Develop an Action PlanAn action plan involves writing down what is going to next now that a potential solution is available.. This plan will realise that the solution happens. The plan can consist of sequential tasks identifying who is doing what, when and the timeline for completion. The following questions should be answered for the action plan What is the overall objective and ideal situation?What is involve in order to get there from here?What actions need to be done?Who will be responsible for each action?How long will each step take and when should it be done?What is the best sequence of actions?What training is required to ensure that each person knows how to execute each step in the p lan?What standards do we want to set?What resources are needed and how will we get them?How will we measure results?How will we follow up each step and who will do it?What checkpoints and milestones should be established?What are the make/break vital steps and how can we ensure they succeed?What could go unconventional and how will we get around it?Who will this plan affect and how will it affect them?How can the plan be adjusted without jeopardizing its results to ensure the best reaction and impact?How will we communicate the plan to ensure support?What responses to change and other human factors are anticipated and how will they be overcome?2.7. put through the SolutionThe solution can be implemented as a project using the action plan as the baseline. Tasks should be proctored and reported on. The Gantt chart could be used to monitor this progress. Regular meetings should be held with relevant stakeholders to communicate progress on the solution and advise if any slippages or b lockers exist on the project. Contingency plans can be devised and implemented to recover from slippages.2.8. Verify the SolutionOnce the solution is implemented, it can be tested be reviewing the normal act of the organisation. Adjustments may be required to improve the effectiveness of the solution. A lessons learnt document/memo should be created highlighting what changes should be made to avoid this type of problem in the future, considering changes in policies and procedures, and training.3. Creative ThinkingEffective problem solving requires creativity. Creativity in problem solving process sparks new solutions and concepts in ever-changing environments. There are various tools that can be used3.1 Six Thinking HatsThis is a tool for group discussion and individual thinking. The technique allows you to look at decisions from a number of important perspectives.In meetings it has the benefit of blocking the confrontations that happen when people with different thinking styles di scuss the same problem.Each Thinking Hat is a different style of thinking.These are explained belowWhite HatThis hat requires you to focus on the facts and data available. Review the information you have, and check what you can learn from it. Look for gaps in your knowledge, and either try to fill them or take account of them.This is where you analyse past trends, and try to extrapolate from diachronic data.Red HatTeam members state problems using intuition, gut reaction, and emotion. This is a method of harvesting ideas. Also try to think how other people will react emotionally. This method can use post-it notes to allow a quick system of voting, and creates a clear visual cue that creates rapid if incomplete covenant around an issue.Black HatUsing black hat thinking, looks at all the bad points of the decision. Team members identify risks and hazards. Decision are looked at to see why it might not work. This is important because it highlights the weak points in a plan. It allow s you to eliminate them, alter them, or prepare contingency plans to counter them. Plans can begin tougher and more resilient. It can also help you to spot fatal flaws and risks before you embark on a course of action.Yellow HatThe yellow hat helps you to think positively and identify with an idea or decision. It is the optimistic viewpoint that helps you to see all the benefits of the decision and the value in it. commonality HatThe Green Hat allows you to develop creative and new ideas solutions to a problem. It is a freewheeling way of thinking, in which there is little criticism of ideas. secular HatThe Blue Hat stands for process control and discusses the thinking process. This is the hat worn by people chairing meetings. Having a facilitator maintain this role throughout helps ensure that the group remains focused on task and improves their chances of achieving their objectives.3.2 discernment MappingThis is a technique that encourages creative thinking as it holds informat ion that the mind finds easy to identify with and review. Mind mapping allows you to quickly find and understand the structure of complex problems. Mind maps are often used during brainstorming. The technique requires that a modelling such as a tree with branches be used. The main parts of the problem are draw on the bigger branches and smaller issues on the secondary branches. Creativity is use to each part of the issue rather than the whole.3.3 UnfreezingThis technique is used where you cannot think of any more ideas. Helps you when your thinking process is blocked or shut down and you cannot find any solutions.3.4 The 5 WhysThis is useful for dealing with problems that have hidden agendas. The technique drills into situations to find the real problem and clarify issues and forming creative solutions.4. Problem Solving of Functional problemAltech UEC specialises in the design, development, supply and support of integrated hardware and software solutions for the world-wide digital Multimedia industry.In the project management field that I function within, the key focus is to deliver product on time, within budget and at the acceptable quality standards. The one area in 60% of all projects that fails to deliver success neary is the mechanically skillful design of the verge. I will use the role model developed in 2 to realise the solution to this problem.4.1 Define/Identify the problema) The mechanical design for each product is only a concept rendering that is unique to each product offering.b) It occurs in the applied science and product management departments.c) During project development of a new product.d) Each offering to the node is unique with no-reuse of existing mechanical enclosures.e) With mechanical engineer, product manager, customerf) An expected 12 weeks talking to of mechanical enclosure is taking 24 wks to completeProblem definitionWhy does the mechanical enclosure take 24 weeks to complete instead of the planned 12 weeksAs a goal objecti ve What must be done to reduce the mechanical enclosure development to 12 weeks.4.2 Analyse the ProblemThis problem has existed approximately 5 years, since the customer was allowed to decide on the aesthetic look of the set-to-box. This is a critical issue to the delivery cycle of product to the customer. The average delivery cycle of a complete unit in production and to the customer should be 6 months. Causes of the problem maybe Unknown technologies being used, Concept rendered drawings rather than mechanical design models, and Customer requiring changes after design was approved. The effect is that there is longer design cycles and longer to food market delivery cycles. The mechanical team have tried to model various options but due to unknown electronic affects such as thermic interrogation and electrical grounding may affect the design.4.3 Generate Possible SolutionsBrainstorming was used to work out possible solutions. Ideas generated were as follows1) Altech UEC generates a set number of enclosures to match the various offerings available. The only change will be on the fascia view of the product.2) The mechanical engineering team designs the model and develops the mechanical model before the product is released to the customer for approval. No acceptance to be done or released to customer on unrealised designs.3) Tooling manufacturers external to UEC are contracted to be involved in the modelling stages to reduce occurrences of designs that will not work4) Review existing procedures and signoff against international standards and make necessary changes where applicable5) Outsource the mechanical design to a 3rd party and performs this as its core business4.4 Analyse the SolutionsThe solution were rated against practicality and cost. The highest rated idea was (1), (5), (2), (4) and (3). It was also thought that a combination of (2), (3) and (4) could be considered as a combination idea.4.5 Select the best SolutionThe best solution selected by votin g was (1). The vote was decided by key stakeholders in the organisation such as the product development team, mechanical team and manufacturing team.4.6 Develop an action planThe action plan answered the questions as followsa) The mechanical enclosure is available at the start of the project. There is no major development to the design of the STB. Only changes will be to the fascia aesthetics.b) A listing of the full product road map is required to define the categories of enclosures to be supported. All mechanical design such as clipping of parts together and thermal cooling to be completed in each category.c) The Engineering Manager will be responsible for driving this through the organisations as a output Design unit initiative. The Product managers will be the custodians of the product categories.d) This is a 6 month initiative with the first step being the product categories. The next step will be the actual design of enclosures to these categories bedding down the mechanical design and product.e) Regular meetings are being held to discuss progress and determine if the plan is in actionf) The realisation will be the use of the first mechanical design on zapper low cost products.g) The Engineering manager will be the sponsor of this project to ensure all stakeholders keep their eyes on the prize4.7 Implement the solutionA Gantt was created to allocate tasks and monitor progress.4.8 Verify the solutionThe product line is being developed according to specific category mechanical model implementations. Effectiveness of the solution will be seen on new products that will go from design into mass production. The cycle time of mechanics can then be measured.5. ConclusionIn propagation were there is a constant change in technology and product development, it is essential to have effective problem solving frameworks. The lack of such framework will lead to problems recurring when they should have been solved. Organisations cannot afford such costly mistakes if they are to be globally competitive. A successful problem solving organization will be a successful organization.

Application Of Types Of Lubricant

Application Of Types Of Lubri deposetA lubricant is a substance (often a bland) introduced amid cardinal miserable outs to reduce the clank surrounded by them, improving efficiency and reducing wear. They may also confine the function of dissolving or transporting foreign particles and of distributing come alive.Basically at that place ar many types of lubricants solidness lubricant, liquid lubricant and gaseous lubricant. They have their own place and application. They ar as fol paltrysPurposesAlmost all the Lubricants perform the interest key functions.Keep moving parts apartReduce encounterTransfer rutCarry away contaminants debrisTransmit precedent hold dear against wearPrevent corrosionSeal for gassesStop the risk of smoke and fire of objectsApplicationsApplication of Semisolid and Solid LubricantsGrease lubricants ar semisolid and have several important advantages They resist being squeezed out, they atomic number 18 rehearseable under heavy charge up conditions and in inaccessible parts where the supply of lubricant can non considerably be renewed, and they tend to form a crust that prevents the entry of dirt or grit among equal surfaces. Grease is a mixture of a lubricant and a thickener often it is make from a mineral fossil oil and a soap. It may be applied in confused ways by packing enclosed parts with it, by pressing it onto moving parts from an adjacent well, by forcing it finished grease cups by a flush device, and by pumping it through drive guns. Solid lubricants ar especially useful at high and minor temperatures, in high vacuums, and in other applications where oil is not suitable common solid lubricants argon graphite and molybdenum disulfide.Application of Liquid LubricantsLiquid lubricants may be characterized in many distinct ways. One of the most common ways is by the type of base oil used. Following are the most common types.Lanolin (wool grease, natural piss repellant)WaterMineral oilsVegetable (n atural oil)Synthetic oilsOther liquidsMechanical devices to supply lubricants are called lubricators. A simple form of lubricator is a container mounted all over a bearing or other part and leave behindd with a hole or an plantable valve through which the lubricant is gravity-fed at the desired rate of flow. Wick-feed oilers are placed under moving parts, and by pressing against them they feed oil by capillary action. Horizontal bearings are frequently oiled by a rotating ring or chain that carries oil from a reference in the bearing housing and distributes it along the bearing through grooves or channels. Bath oiling is useful where an oil-tight reference can be provided in which the bearing journal may be submerged the pool of oil helps to carry away heating plant from arrive at surfaces. Splash-oiling devices are used where gears, bearings, or other parts contained in housings have moving parts that dip into the lubricant and splash it on the bearings or into distribution channels. Centralized oiling governances normally consist of a reservoir, pump, and tubes through which oil is circulated, while heaters or coolers may be introduced to change the viscosity of the lubricant for various parts of the system. Many oiling achievements are automatically synchronized to start and stop with the machinery.P2) let on the operation and sustainment of three unalike lubrication systems. anoint lubricating systems can be divided into three categoriesTotal loss.Self contained.Re-circulating.Total loss lubrication points are always supplied with fresh lubricant (oil, melted grease or grease) at specific intervals ( term or machine cycle-dependent) during the lubricating cycle. It is the only system that allows the lubricating oil to drain away or evaporate.Self contained With self contained lubrication, the oil is contained in a reservoir. A gearbox of a vehicle or a lathe is lubricated in this way. The gear are partly submerged in the oil, this process is c alled splash lubrication. Oil is carried up to the parts that are not submerged, and an oil mist is created intimate the gearbox.Ring oiling is another self contained system in which the oil from a reservoir is carried up to the rotating parts of a mechanism. The ring which is rotating with a have it away is partly submerged in the oil and carries it up to the shaft bearings.Re-circulating With re-circulating system, the oil from a reservoir is fed under pressure prepare to the moving parts or delivered as a spray. The flow is continuous and after passing over the contact surfaces, the oil runs back into the reservoir under the effects of gravity.MaintainanceOil lubrication systems should be checked weekly. This can be carried out by plant operators or maintenance engineering. If needed the tank or reservoir can be topped up taking care not to let any dirt into the system during the process. Systems should not be overfilled as this might caused increases resistance to splash lubr icated parts. It might also lead up to overheating of the oil due to unjustified churning. Dip sticks and sight gauges are usually provided to indicate the correct level or depth in reservoirs.Samples of lubricating oil are taken for laboratory summary at regular intervals as part of a condition monitoring procedure. They are examined to see if they contain any solid wear particles. This can provide useful information to the plant manager and maintenance engineer as to the condition of the plant and machinery.All lubricating oils degrade over a period of time due to oxidation. They should be changed including the filters in a re-circulating system. Human should be careful of lubricating oils, since it can cause skin irritation, it can also lead up to cancer. So humans should always use safety equipments and should also wear protective clothing and maybe goggles for the eyes, when handling lubricating oils.References http//en.wikipedia.org/wiki/Lubricant, engineering bookP3)Describ e the operation of integrity seal, one type of packing and two unalike types of bearing with a typical application for individually one.SealsFor the task , I will be doing oil seal. Oil seals are flange packing having an elastomer lip bonded to a metal cup, these lips are loaded to accommodate shaft running out and helps in sealing. There are two types of oil seals. Single seals , which are recommended only for non-pressure service and are best against good lubricating media. And the other one is double sealing, which are normally used to handle pressure in eiher direction along the shaft. The main function of oil seal is to stop whatever fluid is inside from leaking out the clearance between the shaft and housing.PackingFor packing, I will be explaining about gland packing seals. they are usually made of cotton, asbestos, flax or jute. In this packing, compressed synthetic fibers are also used and sometimes impregnated with graphite to assist lubrication. It has the advantage to withstand higher internal pressures than lip seals. in this packing, a collar is tightened so that packing material forms a seal around the shaft. A bitty measuring stick of water for lubrication and cooling the packing is also allowed to drip to the atmosphere. It is normally used as a seal for both rotating and reciprocating shafts.BearingThe purpose of the bearing is to support and locate rotating and reciprocating shafts or parts in machines and is to transmit force from one segment to the other while allowing their relative question/ movement to occur with the minimum resistance to motion.Two bearing I will choose for this task are plain bearing and roller bearing.Plain bearing it is a typical bearing made of two parts. For e.g. a rotary plain bearing can be just a shaft through hole. A simple bearing can be duo of straight off designed to allow motion. It has flat , cylindrical or spherical surfaces which slide relative to each other.It can be used to carry load in one of several ways depending on their operating conditions, surface, clearance and temperature. It may be used to comprise a rotating collar with a flat surface loaded against a plain or grooved thrust ring. It is also designed to withstand the forcve acting along the axis vertebra of the shaft, parallel to the axis of rotation.Roller bearing this bearing carries a load by placing round elements between the two pieces. The relative motion of the pieces causes the round elements to roll with very little rolling resistance and with little sliding.A rolling element rotary bearing uses a shaft a much big hole and cylinders called rollers tightly fill the space between shaft and hole. The bearing are often used for axles due to their low rolling friction.References handout given by teachersP4)Describe two different types of screwed fastening and two different types of rivet giving a typical application for each one.Screwed fastening are used to see semi permanent joints which allow acces s and removal of fastened parts for maintenance and/or repairs. There are many types of screwed fastening of which the two I am going to mention here are nuts and studs and set screws.stud and nuts it is a length of bar which has been threaded at each end, the shorter threaded end is screwed into the major component. It is used for inspecting machine cover needs to be removed regularly for maintenance purpose.Set screws it is also known as machine screws however it does not used a nut. It is usually used to join a thin plate to a larger component. Screws are operable with different effects of head for different applications. It can be used as locking devices.P6)Describe the ar investment and operation of two different kinds of belt drive, two different kinds of chain drive and two different kinds of gear train.A) Belt drive A belt drive is a method of transferring rotary motion between two shafts. A belt drive includes one pulley on each shaft and one or more than continuous belt s over the two pulleys. The motion of the driving pulley is, generally, transferred to the driven pulley via the friction between the belt and the pulley. Synchronous/timing belts have teeth and therefore do not depend on friction. Belt drives and gear transmission systems have a much broader life expectancy than belt drives. Belt drives also have relatively high inspection and maintenance demands. There are many types of belt in which I am going to explain two of them1) bend beltsRound belts are a circular cross section belt designed to run in a pulley with a circular (or near circular) groove. They are for use in low torque situations and may be purchased in various lengths or cut to length and joined, either by a staple, gluing or welding (in the case of polyurethane). Early sewing machines utilized a leather belt, joined either by a metal staple or glued, to great effect.2) Ribbed beltA ribbed belt is a power transmission belt featuring lengthwise grooves. It operates from c ontact between the ribs of the belt and the grooves in the pulley. Its single-piece social structure it reported to offer an even distribution of tension across the width of the pulley where the belt is in contact, a power range up to 600 kW, a high speed ratio, serpentine drives (possibility to drive off the back of the belt), long life, stability and homogeneity of the drive tension, and reduced vibration. The ribbed belt may be fitted on various applications compressors, fitness bikes, agricultural machinery, food mixers, washing machines, lawn mowers, etcB) Chain drive catch widely used for the transmission of power where shafts are dis siteed at distances greater than that for which gears are practical. In such cases, sprockets (wheels with teeth shaped to mesh with a chain) take the place of gears and drive one another by means of a chain passing over the sprocket teeth. The chains used in conveyor belts are commonly block chains, and consist of solid or laminated blocks connected by side plates and pins. The blocks engage with teeth on sprocket wheels. Depending on the material being moved, buckets, hooks, or other devices are connected to the blocks.1) Roller Chain Motion transmitted using shaft mounted sprockets. Simplex chain consists of length of single links, duplex is length of double links, treble is length of triple links. Chain drives should ideally be lubricated and regularly cleaned . However experience shows that this drive method will work for long periods without lubrication or maintenance2) Inverted Tooth Also called silent. Motion transferred via shaft mounted pinions (similar to gear wheels.) Higher power power capacities, higher speeds and smoother operation. These drive system by all odds requires lubrication. (Oil bath, or spray.)C) cogwheel train A combination of two or more gears used to transmit motion between two rotating shafts or between a shaft and a slide. It is a set or system of gears arranged to transfer rotational torque from one part of a mechanic system to another.1) Simple Gear TrainIt is made of few components, a small gear at the centre called the sun, several medium sized gears called the planets and a large external gear called the ring gear. The planet gear rolls and revolves about the sun gear and the ring gear rolls on the planet gear.2) Simple Gear TrainThe most common of the gear train is the gear pair connecting parallel shafts. The teeth of this type can be spur, helical or herringbone. The angulate pep pill is simply the reverse of the tooth ratio. The main limitation of a simple gear train is that the maximum speed change ratio is 101. For larger ratio, large size of gear trains are required. The sprockets and chain in the bicycle is an example of simple gear train.P7 Describe the arrangement and operation of two different kinds of transmission shaft and twosome, two different kinds of slew and two different kinds of braketransmission shaft rotating shaft that transmits rotary motion from the engine to the derivativeDifferent types of shaftsPlain transmissionStepped shaftMachine tool spindleRailway rotating axleNon-rotating axleCrankshaftPropeller shaftCrankshaftThe crankshaft is that part of an engine which converts linear piston motion into rotation. The crank and connecting rod mechanism was first used in Roman water mills, to convert the reciprocating motion into rotation, the crankshaft has crank th courses or crankpins. More than one piston is attached to the crank to provide a smoother delivery of power to the rotating part, though many small engines such as those found in garden machinery, use only a single piston. The configuration of pistons in relation to each other and the crank and their number leads to descriptions such as straight-4 (four pistons in direct line), V6 or V8.Transmission shafts sizes vary from 10 to 100mm but it can go higher then these figures, the maximum length of shaft usually does not kick the bucket 7m.Propell er shaftPropeller shafts transmit power between the source and the machine, the propeller shaft assembly consists of a propeller shaft, a slip joint, and one or more universal joints. This assembly provides a tensile connection through which power is transmitted from the transmission to the live axle. Axle is similar in shape to the shaft and support bending movements only. The propeller shaft may be solid or tubular. A solid shaft is stronger than a hollow or tubular shaft of the same diameter, but a hollow shaft is stronger than a solid shaft of the same weight.A slip joint is present at one end of the propeller shaft to take care of end play. The driving axle, attached to the springs, is free to move up and down, while the transmission is attached to the frame and cannot move.CouplingsA coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. The primary purpose of couplings is to join two pieces of rotating equipment while p ermitting some degree of misalignment or end movement or both. By using couplings, savings can be made in reduced maintenance costs and downtime.Thompson couplingThompson coupling is a constant velocity universal joint that can be loaded axially and continue to maintain constant velocity over a range of input and output shaft angles with low friction and vibration. It consists of two cardan joints assembled inside each other, so eliminating the intermediate shaft along with a control yoke that geometrically constrains their alignment. The use of cardan joints within the Thompson Coupling is to reduce the wear, heat and friction.The Oldham couplingThe Oldham coupling transmits rotary motion between shafts that are parallel but not always in perfect alignment. Oldham couplings consist of three members, a floating member is trapped by 90 displaced grooves between the two outer members which connect to the drive shafts. Oldham couplings can bear lateral shaft misalignments up to 10% of titular shaft diameters and up to 3 angular misalignments.ClutchA clutch is a mechanism for transmitting rotation, which can be engaged and disengaged. Clutches are useful in devices that have two rotating shafts. In these devices, one shaft is typically driven by a motor or pulley, and the other shaft drives another device.Friction clutch it connects two separate pieces of shaft, it also has prys and springs to disengage/engage plates. The primary disadvantage of friction clutches is the regular maintenance and allowance that are required, mating parts will wear due to friction (resulting in slippage), springs will lose memory, and other parts will need replenishment or adjustment.Positive clutchA clutch designed to transmit torque without slip. It consists of two mating surfaces with interconnecting elements, such as teeth, that lock together during assignment to prevent slipping. Positive clutches are also known as mechanical lockup clutches.BrakeA specific type of clutch tha t slows and dough motion by engaging a rotating shaft and a fixed component.Disc brakeThe disc brake or disk brake is a device for slowing or stopping the rotation of a wheel. A brake disc (or rotor in U.S. English), usually made of cast constrict or ceramic composites (including carbon, Kevlar and silica), is connected to the wheel and/or the axle. To stop the wheel, friction material in the form of brake pads (mounted on a device called a brake caliper) is forced mechanically, hydraulically, pneumatically or electromagnetically against both sides of the disc. Friction causes the disc and attached wheel to slow or stop. Brakes (both disc and drum) convert friction to heat, but if the brakes get too springy, they will cease to work because they cannot dissipate enough heat. This condition of failure is known as brake fade.hydraulic brakeThe hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing ethylene glycol, to transfer pressure fro m the controlling unit, which is usually near the operator of the vehicle, to the certain brake mechanism, which is usually at or near the wheel of the vehicle.P8 Describe with the aid of diagrams the general layout and operation of a pneumatic actuation system, a hydraulic actuation system and a mechanical handling systemPneumatic autuation systemA pneumatic actuation system is capable of directing an amount of fluid to the contained volume such that a pressure within the contained volume exceeds a pressure external to the contained volume by a predefined positive pressure. With the pressure control, It can also adjust the pressure within the contained volume when the pressure external to the contained volume changes. The educator can draw fluid from the contained volume to thereby decrease the pressure within the contained volume. The valve is controllably operable in either a pressure mode or a vacuum mode, where the valve either permits the pressure controller to provide fluid to the contained volume, or permits the educator to draw fluid from the contained volume. As such, the system provides precision pressure control over a broad range of external pressures while compensating for fast pressure changes.Fig. example of pneumatic aculator.Hydraulic actuation systemA hydraulic system for a sterndrive marine actuation device directs the flow of hydraulic fluid through the body and peripheral components of a gimbal ring in order to reduce the number and length of flexible hydraulic conduits necessary to conduct pressurized hydraulic fluid from a pump to one or more hydraulic cylinders used to control the trim or tilt of a marine drive unit relative to a gimbal housing.Mechanical handling systemMechanical handling is simply a row of roller/cylindrical or triangle cross-sectional component. They are mostly covered by a long belt but it is not necessary.The rollers or what ever it is used are rotating and the product/component will be moving along and the oth er rollers will pull it along like the contrive is shown below. The component/product will move until it achievees its destination or the end of the rollerP9 Describe with the aid of diagrams the general layout and operation of a steam power generation plant, a refrigeration system and an air conditioning system.refrigeration systemBASIC REFRIGERATION PRINCIPLESIf you were to place a hot cup of coffee tree on a table and leave it for a while, the heat in the coffee would be transferred to the materials in contact with the coffee, i.e. the cup, the table and the surrounding air. As the heat is transferred, the coffee in time cools. Using the same principle, refrigeration works by removing heat from a product and transferring that heat to the immaterial air.REFRIGERATION dodge COMPONENTSThere are five basic components of a refrigeration system, these are Evaporator Compressor Condenser Expansion Valve Refrigerant to conduct the heat from the productIn order for the refrigeration cycle to operate successfully each component must be present within the refrigeration system.The EvaporatorThe purpose of the evaporator is to remove unwanted heat from the product, via the liquid cold. The liquid refrigerating contained within the evaporator is boiling at a low-pressure. The level of this pressure is determined by two factors The rate at which the heat is absorbed from the product to the liquid refrigerant in the evaporator The rate at which the low-pressure vapour is removed from the evaporator by the compressorTo enable the transfer of heat, the temperature of the liquid refrigerant must be lower than the temperature of the product being cooled. Once transferred, the liquid refrigerant is drawn from the evaporator by the compressor via the suction line.When leaving the evaporator coil the liquid refrigerant is in vapour form.The CompressorThe purpose of the compressor is to draw the low-temperature, low-pressure vapour from the evaporator via the suction line. Once drawn, the vapour is compressed. When vapour is compressed it rises in temperature. Therefore, the compressor transforms the vapour from a low-temperature vapour to a high-temperature vapour, in turn increasing the pressure. The vapour is then released from the compressor in to the discharge line.The CondenserThe purpose of the condenser is to extract heat from the refrigerant to the outside air. The condenser is usually installed on the reinforced roof of the building, which enables the transfer of heat. Fans mounted above the condenser unit areused to draw air through the condenser coils.The temperature of the hard-hitting vapour determines the temperature at which the condensation begins. As heat hasto flow from the condenser to the air, the condensation temperature must be higher than that of the air usually between 12C and -1C. The high-pressure vapour within the condenser is then cooled to the point where it becomes a liquidrefrigerant once more, whilst retaining some heat. The liquid refrigerant then flows from the condenser in to the liquid line.The Expansion ValveWithin the refrigeration system, the expansion valve is located at the end of the liquid line, before the evaporator. The high-pressure liquid reaches the expansion valve, having come from the condenser. The valve then reduces the pressure of the refrigerant as it passes through the orifice, which is located inside the valve. On reducing the pressure, the temperature of the refrigerant also decreases to a level below the surrounding air. This low-pressure, low-temperature liquid is then pumped in to the evaporatorM1) . Compare and contrast the operation and uses of flat plate clutches, outward-developing clutches and fluid couplings in mechanical power transmission systemsflat plate clutchescentrifugal clutchesfluid couplingsThe fluid coupling is operated simply by a hydraulic fluid and the driver bladed wheel. The driver wheel excludes and rotates the fluid in between follows it al ong and cause the driven bladed wheel to rotate along the hydraulic fluid. The hydraulic and driven bladed wheel are still under motion even if the driver bladed wheel stops.The friction disc is sandwiched between the machined surfaces of the flywheel and the pressure plate when the pressure plate is bolted to the outer edge of the flywheel face.The clamping force on the friction facings is provided by the diaphragm spring. Unloaded, it is a serve up shape. As the pressure plate cover tightens, it pivots on its fulcrum rings, and flattens out to exert a force on the pressure plate, and the facings.It is used in gears, turbine and many more.A clutch operated by centrifugal force from the speed of rotation of a shaft, as when heavy expanding friction shoes act on the internal surface of a rim clutch, or a flyball-type mechanism is used to activate clutching surfaces on cones and disks.Weights wherein each weight has an arc-shaped clutch shoe and is pivotally mounted with a lever foot on a carrier disc on the drive end of the clutch. After reaching a specific rpm, the clutch shoes are pressed under the action of centrifugal force against the inner wall surface of a clutch drum for providing friction-tight torque transmission. The clutch drum surrounds the clutch shoes. The centrifugal clutch includes a carrier disc on which the centrifugal weights are pivotally mounted. A cover disc is held axially tight at the sides of the centrifugal weights which lie opposite the carrier disc. This cover disc radially covers the clutch shoes so that axial guide play is provided.It is used in generators.Device used to transmit rotating mechanical power. It has been used in automobile transmissions as an alternative to a mechanical clutch.There is no mechanical interconnection between the impeller and the rotor (i.e. the driving and driven units) and the power is transmitted by virtue of the fluid filled in the coupling. The impeller when rotated by the prime mover imparts velo city and energy to the fluid, which is converted into mechanical energy in the rotor thus rotating it.It is used n aviation, engineering companies and many more.M2)Compare and contrast the operation and use of pneumatic and hydraulic actuation systemsPneumatic autuation systemA pneumatic actuation system is capable of directing an amount of fluid to the contained volume such that a pressure within the contained volume exceeds a pressure external to the contained volume by a predefined positive pressure. With the pressure controller, It can also adjust the pressure within the contained volume when the pressure external to the contained volume changes. The educator can draw fluid from the contained volume to thereby decrease the pressure within the contained volume. The valve is controllably operable in either a pressure mode or a vacuum mode, where the valve either permits the pressure controller to provide fluid to the contained volume, or permits the educator to draw fluid from the contained volume. As such, the system provides precision pressure control over a broad range of external pressures while compensating for rapid pressure changes. pneumatic actuator system provides the advantage of lower weight and more economical construction. One distinct advantage of a pneumatic system is that it may utilize a source of bottled gas or the like as a potential energypower source.Fig. example of pneumatic aculator.Hydraulic actuation systemA hydraulic system for a sterndrive marine propulsion device directs the flow of hydraulic fluid through the body and peripheral components of a gimbal ring in order to reduce the number and length of flexible hydraulic conduits necessary to conduct pressurized hydraulic fluid from a pump to one or more hydraulic cylinders used to control the trim or tilt of a marine drive unit relative to a gimbal housing.advantages of pneumatic acutators over hydruallic actuators comparatively cheaper. The force transmitter, air, is freely avail able. Cleaner system as air leakage do not create a mess. Hydraulic oil becomes very hot after continuous use. Can cause injury if someone comes in contact. Generally have open circuits and we dont have to worry about the return circuit. absolve the use of Shell Tellus oil 27 lubricant and the splash lubrication system in the lathe machines in the College machine shop.Shell Tellus Oils oil 27 are support quality hydraulic oils generally acknowledged to be the standard-setter in the field of engineering hydraulic and fluid power lubrication.The Shell Tellus oil 27 lubricants are mineral oils.It has an active anti-corrosion additive effectively protects hydraulic systems from corrosion. Water collects in the lubrication system due to condensation with soluble cutting fluid and is emulsified to provide just protection. It has excellent anti wear which means that lathe machine can be used for longer unlike other lubricants, it also helps improve the efficiency of filtration systems to reach system cleanliness targets.The dirt can also clean easily off. The lubricant provides anti-war and increase the resistance of the lathe material surface. It also helps to operate under high temperature very it works as a coolant. The lubricant also does a quick air release without excessive foaming. Other point is that the lubricant has very low environmental impact because of the zinc free technology. It also doesnt react with other chemical when it is in use.Shell tellus oil 27 has high lubrication properties and excellent low friction characteristics in hydraulic systems operating at low or high speed. Prevents stick-slip problems in critical applications enabling very fine control of machinery.

Steven Biko Essay -- Papers Racism South Africa

Steven BikoWe are looking forward to a non-racial, just and egalitarian society in which color, creed and turn tail shall form no point of reference. - Steve Biko randomness Africa is home to a great supply of natural resources, inherent beauty, and one of the greatest political and kindly travesties of the red-brick era. The South African government has suppressed native African peoples for hundreds of years. In the last century the situation has gotten progressively worse through governmental decree lead by the racist Afrikaner Nation Party. This injustice lasted unchallenged until the late 1950s when legislation became even more protective of the National Partys hold of political, economic, and social power.Social movements of every country and era rise and fall Africa is no different. As leaders have come and gone, gathering public support against the government, the formidable reality has been slowly sinking in. Political activist and former student leader, Steve Biko firml y believed that South Africa could eventually exist as an egalitarian society, free of racism. Bikos office to the South African freedom fight is invaluable.The South African government practiced banning which, prohibited anyone quoting Biko, the publication of any of his written work or the documentation of his character in any positive way. Banning was not uncommon in South Africa. The person had to remain in their assigned zone and could not leave under any circumstances. The banned person could not be in the presence of more than one person at a time the only exception being immediate family. It also forbade the person from writing (publishing) and speaking in public. Once a week the person was infallible to report to the local Se... ... popularity grew after his death because he was no longer seen as a leader, but rather a martyr. So why is South Africa still under white control? My answer to that is that talk is cheap and publicity even cheaper. The support and headlines w ere all that was given. Nothing permanent or unified was offered to the blacks. Today, a little less than thirty years later, I had trouble finding books on Steve Biko. To the western world he was a fad.BibliographyBibliographyBiko, Steve. I pen What I Like. Ed. By Stubbs C.R., Aelred. Harper and Row Publishers, San Francisco. 1978.Dugard, John, Haysom, Nicholas and Marcus, Gilbert. The Last Years of Apartheid Civil Liberties in South Africa. Ford Foundation, rude(a) York. 1992.Woods, Donald. Biko, the revised edition. Henry Holy and Co., New York. 1987.I also viewed the movie Cry Freedom

The New Yorker Magazine Essay -- essays research papers

The raw YorkerCOVER ANALYSISJuly, 1966 The cover of the July 2nd, 1966 interpretation of The New Yorker includes artwork by Michael Getz. Displaying a show of patriotism, Getz uses the entire portion of the cover to present an illustration of an American flag hanging from the front of a typical upper-middle class designed home. However, new(prenominal) than the title of the magazine and the drawing itself, the only other printed words contained on the cover are the date of the issue and the price of the magazine 35 cents. July, 1986 The July 7th, 1986 random variable of The New Yorker presents a cover with a cartoon illustration of a woman holding a very large birthday/celebration cake. same to the rhetoric of the 1966 issue, John Biechman uses the colors of red, white, and blue within the womans dress to portray the patriotic feeling of our Independence Day, The Fourth of July. In step-up to the American flag colors within the womans dress and garment Biechman includes a f igure of the Statue of Liberty on top of the cake to that express a feeling of patriotism. July, 1996 The July 8th, 1996 edition of The New Yorker once again includes the field of study of nationalism with Jeremy Falcones insure of the Statue of Liberty holding a shabu fire work in its hand. Interestingly enough Joseph Pulitzer, founder of The New York World & Pulitzer Prize, was partially responsible for obtaining the statue from the country of France. Pulitzer used his public influence and image to collect nickels & dimes from immigrants, convincing such immigrants the statue would be a symbol of their newly gained freedom. Moreover, even though the price of the magazine has gone from 35 cents in 1966 to $2.95 in 1996, the display and headline of the cover are exactly the same as they were thirty years before (i.e. Plain and clear title of publication, no watch of articles included, and no running ads on the front page). ADVERTISING ANALYSIS*July, 1966Alcohol/Gin A majority , if not over half of all the ads contained within the edition are pertaining to alcohol. In specific, gin appears to be the most popular and targeted liquor of the era, with the theme Dryer is Better. Evidence of how predominant such a theme was is Gancia, an imported Italian Ve... ...milar to that of the New Journalism techniques of the early 1900s. Articles on Medicare and President Policy are not likely to be attractive writings anymore, for The New Yorker seems to have lightened its political agenda with time. Biographies and personal stories have replaced the political articles of the past, as The New Yorker has gone back to its traditional conservative roots as a high-culture/fine arts magazine. In conclusion, the most predominant theme throughout the publication of The New Yorker has been international travel. Those individuals interested in traveling overseas are usually quite affluent, and are too attracted to the history and art of culture around the world. The overwhelm ing amount of articles pertaining to foreign culture and arts are complemented by a number of advertisements from airline companies, international hotels, and imported alcohol industries. A great way to analyze a publications ideal audience is to look at the advertisements in-between the fine print. Although changing from time to time, The New Yorker has remained a magazine of high-culture taste, highlighting lifes pleasure of art, travel, and history.