Energy Harvesting from Mechanical Vibrations Essay Example

Energy Harvesting from Mechanical Vibrations Essay Human power-based energy harvesting strategies for mobile electronic devices a. Describe the application (10%) 1. 2. 3 Wearable or implantable medical devices Implantable or wearable medical devices refer to any device that could help monitor metabolic parameters, assist defective physical function or cure diseases. Structural devices such as artificial joints, vascular grafts and artificial valves are called passive devices and their working does not need external power. But active devices can consume energy with different orders of magnitude from microwatts to several watts, as shown in Table 2. b.Identify how the mechanical vibration is induced (20 %) 2. 3. 1 Characterization of vibration system for motion harvesting Displacement driven generators are typically inertial mechanism-based, second-order vibration systems excited by periodical human body movement of the legs, limbs or feet. Ideally, these systems can be described as spring-mass systems , as shown in Fig. 5. The frame i s attached to the moving body. A proof mass (m) is suspended inside. A spring (with stiffness of k) and a damper (with damping coefficient of c) couple the relative movement (Z1) between these two parts. Z1 induces electricity by the ransduction mechanism of the damper. Assuming that the mass of the vibration source is significantly larger than that of the seismic mass and therefore not affected by its presence, and that the external excitation is harmonic, then the differential equation of motion is described as (5) The standard steady-state solution for the mass displacement is given by (6) where f is the angle phase given by : (7) Maximum energy can be extracted when the excitation frequency matches the natural resonant frequency of the generator system ? n, given by : (8) The vibration structure for which resonant frequencies ange from 10 kHz to 1 MHz is good at converting the high frequency energy of machine vibration with small amplitude to electrical energy. However, the huma n body moves at a low frequency of less than 10 Hz [49] and at high amplitude. For the human being as the excitation source, a specific design must be developed. The state-of-the-art technique to harvest vibration energy from low frequency excitation is especially reviewed in this paper. It should be noted that the damping coefficient [50] is comprised of parasitic losses, cp, and electrical energy extracted by the transduction mechanism, ce. As the xtracted energy is characterized by the transduction mechanism or the coupling efficiency of ce, a comprehensive review of existing transduction mechanisms and their specific characteristic equations are presented and compared in the following section. c. Describe how the operation utilises the source of mechanical vibration to achieve the desired outcomes (30%) 2. 2. 3 Electromagnetic induction Based on Faraday’s law on electromagnetic induction, the variation in magnetic flux through an electrical circuit yields an open circuit voltage. Almost all traditional conductors take the form of a coil and the electricity is enerated by either the relative movement of the magnet and coil, or by changes in the magnetic field. The most natural method to innocuously tap human activity power is by placing sets of coil and magnet to extract their relative activities [43,44]. Low transduction efficiency yet high power output [45] due to cumbersome mounting and bulk scale has been described in many applications. Their power generation ability is characterized by direct proportion to the scale of coils or length of stroke. However, innovative designs [46] particularly engineered by human activity outperform their predecessors everal times 2. 3. 2 Piezoelectric property An expression for the piezoelectric damping coefficient is [51] , (9) where k is the piezoelectric material electromechanical coupling factor, Cload is the load capacitance, and Rload is the load resistance. The amount of energy generated by piezoelectric d. Relate this to the course material covered (20%) Page 7 of the Human movement one. http://en. wikipedia. org/wiki/Piezoelectricity http://www. sensorsmag. com/sensors/acceleration-vibration/sonic-nirvana-mems-accelerometers-acoustic-pickups-musical-i-5852 http://www. engineeringvillage. com. zproxy. lib. monash. edu. au/controller/servlet/Controller? CID=quickSearchAbstractFormatamp;searchtype=Quickamp;SEARCHID=75055c4f13e72f6c8b0M5b5dprod2con2amp;DOCINDEX=5amp;database=2285571amp;format=quickSearchAbstractFormatamp;tagscope=amp;displayPagination=yes http://www. engineeringvillage. com. ezproxy. lib. monash. edu. au/controller/servlet/Controller? CID=quickSearchAbstractFormatamp;searchtype=Quickamp;SEARCHID=75055c4f13e72f6c8b0M5b5dprod2con2amp;DOCINDEX=14amp;database=2285571amp;format=quickSearchAbstractFormatamp;tagscope=amp;displayPagination=yes http://www. ngineeringvillage. com. ezproxy. lib. monash. edu. au/controller/servlet/Controller? CID=quickSearchAbstractFormatamp;search type=Quickamp;SE ARCHID=75055c4f13e72f6c8b0M5948prod2con2amp;DOCINDEX=52amp;database=2285571amp;format=quickSearchAbstractFormatamp;tagscope=amp;displayPagination=yes Abstract Energy problems arise with the proliferation of mobile electronic devices, which range from entertainment tools to life saving medical instruments. The large amount of energy consumption and increasing mobility of electronic devices make it urgent that new power sources hould be developed. It has been gradually recognized that the human body is highly flexible in generating applicable power from sources of heat dissipation, joint rotation, enforcement of body weight, vertical displacement of mass centers, and even elastic deformation of tissues and other attachments. These basic combinations of daily activities or metabolic phenomena open up possibilities for harvesting energy which is strong enough to power mobile or even implantable medical devices which could be used for a long time or be recharged permanen tly. A comprehensive eview is presented in this paper on the latest developed or incubating electricity generation methods based on human power which would serve as promising candidates for future mobile power. Thermal and mechanical energy, investigated more thoroughly so far, will particularly be emphasized. Thermal energy relies on body heat and employs the property of thermoelectric materials, while mechanical energy is generally extracted in the form of enforcement or displacement excitation. For illustration purposes, the piezoelectric effect, dielectric elastomer and the electromagnetic induction couple, which can convert orce directly into electricity, were also evaluated. Meanwhile, examples are given to explain how to adopt inertia generators for converting displacement energy via piezoelectric, electrostatic, electromagnetic or magnetostrictive vibrators. Finally, future prospects in harvesting energy from human power are made in conclusion. Keywords mobile electronic dev ice, human power, energy harvesting, micro/miniaturized generator, battery, green energy 1 Introduction 1. 1 Energy issue and large scale solution Electricity is increasingly consumed by proliferating electronic products and appliances.The development of an energy-efficient, stable, yet cheap and convenient power source has been the focus of research. Meanwhile, the energy issue has always been a potential threat to society ever since industrialization. The biggest problem is the environmental and health pressure caused by generating electricity using fossil fuels. Emissions of primary small particles (less than 2. 5 ? m), secondary small particles (less than 10 ? m), sulphur dioxide and nitrogen oxides directly cause pneumoconiosis, progressive massive fibrosis, emphysema, chronic bronchitis, and accelerated loss of lung function1.Greenhouse gases are also contributing to the warmer climate and increasing number of floods, tornadoes and other forms of disastrous weather. According to a WHO study [1], 1500000 people were killed by greenhouse gas-related diseases from 1900 to 2000. Clearly, sustainable and long-term development can not rely only on the finite reserves on earth. Although energy efficiency is improving and recoverable reserves are increasingly being adopted, exhaustion of traditional energy is just around the corner. It is now recognized that renewable and clean energy sources are among the 2. Displacement driven generator (inertia vibration) 2. 3. 1 Characterization of vibration system for motion harvesting Displacement driven generators are typically inertial mechanism-based, second-order vibration systems excited by periodical human body movement of the legs, limbs or feet. Ideally, these systems can be described as spring-mass systems , as shown in Fig. 5. The frame is attached to the moving body. A proof mass (m) is suspended inside. A spring (with stiffness of k) and a damper (with damping coefficient of c) couple the relative movement (Z1) between these two parts.Z1 induces electricity by the transduction mechanism of the damper. Assuming that the mass of the vibration source is significantly larger than that of the seismic mass and therefore not affected by its presence, and that the external excitation is harmonic, then the differential equation of motion is described as mâ‚ ¬z? t? ? c_z? t? ? kz? t? ? –mâ‚ ¬y? t? : (5) The standard steady-state solution for the mass displacement is given by z? t? ? ! 2 ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ? k=m– ! 2? 2 ? ?c! m? 2 q Y0sin ?! t – f? , (6) where f is the angle phase given by f ? tan– 1 c! k – ! 2m _ _ : (7) Maximum energy can be extracted when the excitation frequency matches the natural resonant frequency of the generator system ? n, given by !n ? ffiffiffiffi k m r : (8) The vibration structure for which resonant frequencies range from 10 kHz to 1 MHz is good at converting the high frequency energy of machine vibration with small amplitude to electrical energy. However, the human body moves at a low frequency of less than 10 Hz [49] and at high amplitude. For the human being as the excitation source, a pecific design must be developed. The state-of-the-art technique to harvest vibration energy from low frequency excitation is especially reviewed in this paper. It should be noted that the damping coefficient [50] is comprised of parasitic losses, cp, and electrical energy extracted by the transduction mechanism, ce. As the extracted energy is characterized by the transduction mechanism or the coupling efficiency of ce, a comprehensive review of existing transduction mechanisms and their specific characteristic equations are presented and compared in the following section. 2. 3. 2 Piezoelectric propertyAn expression for the piezoelectric damping coefficient is [51] ce ? 2m! 2n k2 2 ffiffiffiffiffiffiffif fiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ! 2n ? 1=? RloadCload? 2 q , (9) where k is the piezoelectric material electromechanical coupling factor, Cload is the load capacitance, and Rload is the load resistance. The amount of energy generated by piezoelectric Accession number: | 20102713059950| | Title: | Towards a self-tunable, wide frequency bandwidth vibration energy harvesting device| | Authors: | Challa, Vinod R. 1 ; Prasad, M. G. 1 ; Fisher, Frank T. | | Author affiliation: | 1 Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, United States | | Corresponding author: | Challa, V. R. ([emailprotected] edu) | | Source title: | ASME International Mechanical Engineering Congress and Exposition, Proceedings| | Abbreviated source title: | ASME Int Mech Eng Congress Expos Proc| | Volume: | 6| | Monograph title: | Proceedings of the ASME International Mechanical Engineering Congress and Ex position 2009, IMECE2009| | Issue date: | 2010| | Publication year: | 2010| | Pages: | 57-65| | Language: | English| ISBN-13: | 9780791843796 | | Document type: | Conference article (CA)| | Conference name: | 2009 ASME International Mechanical Engineering Congress and Exposition, IMECE2009| | Conference date: | November 13, 2009 November 19, 2009| | Conference location: | Lake Buena Vista, FL, United states| | Conference code: | 80879 | | Publisher: | American Society of Mechanical Engineers, 3 Park Avenue, New York, NY 10016-5990, United States| | Abstract: | Vibration energy harvesting is increasing in popularity due to potential applications such as powering wireless sensors and ultra low power devices.For efficient energy harvesting, matching the device frequency to the source frequency is a major design requirement. Since mechanical vibrations differ in characteristics (frequency and acceleration amplitude), it is difficult to design an individual energy harvesting device for every source. Recently, several groups have pursued techniques to tune the resonance frequency of the vibrating structure through active and passive methods.In this paper, work has been done to attain a self-tunable energy harvesting device, which utilizes a magnetic force resonance frequency tuning technique to tune the device. The device is successfully tuned with in a bandwidth of  ± 27% of its untuned resonance frequency, considering root mean square of the peak power output as the cutoff for frequency bandwidth. Since the technique is semi-active, energy is only consumed to tune the resonance frequency and is not required to remain at that specific frequency. The device consists of a

Meech Lake Accord essays

Meech Lake Accord essays 1982 was the year that the federal parliament and nine out of ten provincial legislatures agreed on the Constitution Act, which would bring the constitution home from Britain to Canada on April 17, 1982. The only legislature that did not agree was Quebec. Quebec refused to participate in this constitutional process of patriation because the province believed it did not address their political concerns and issues. People constantly talked of the need to bring Quebec into the constitution. They hoped that this would finally end the constitutional problem that had plagued Canada for more than a generation. On April 30th 1987, Mulroney met with ten premiers in an attempt to win their final approval for constitutional changes designed to overcome Quebecs objections to the 1982 pact. Mulroney and the ten premiers reached a constitutional agreement that was acceptable to Premier Robert Bourassa of Quebec. This was known as The Meech Lake Accord of 1987. This Accord, named after the location where the conference was held, recognized Quebec as a distinct society. All the provinces shared with Quebec the other articles included in the Accord, namely greater provincial control over immigration, the power to nominate Quebec judges to the Supreme Court of Canada from which the federal government would choose, the right to remain outside new cost-sharing agreements without financial penalty, and a veto over constitutional change. A three-year deadline for public hearing, feedback, and approval was launched when Quebecs National Assembly approved Meech on June 23rd 1987. However, before they could sign the constitution with honour and enthusiasm1, Quebec had five conditions that needed to be fulfilled. The following will discuss these five conditions that were proposed as well as its consequences. The first and probably most important condition that would accommodate Quebec is the constitutional recognition tha...

Renewable energy Essay Example | Topics and Well Written Essays - 500 words - 1

Renewable energy - Essay Example energy is energy generated from resources that are naturally refilled on a human timescale such as rain, geothermal heat, waves, sun, and wind (Harvey and Brown 41). The cost of generating hydropower is low making it the most preferable source of the world’s renewable energy. Further, hydroelectric plants are said to have long economic lives with some plants having the ability to be in service for over 50 years. The cost of operation is not high since plants are automated and have few people on site during normal operations. In addition, hydro energy is more flexible source of power or electricity because plants can be ramped or inclined up and down to adapt to transforming energy needs. Once a hydropower dam is constructed, the project generates no direct waste to the ecosystem and has low production of greenhouse gases than fossil fuels (Somma 46). It is vital to note that many nations recommend energy sources such as hydropower, wind and sun because they do not emit any harmful chemicals and gases such as carbon dioxide and it is not a major contributor to global warming via carbon dioxide. Energy source such as hydropower is a renewable source of energy or power because rivers and streams are naturally available. Further, hydropower is not expensive as compared to energy produced from nuclear energy or fossil fuels. The advantage of hydroelectric reservoirs is that they are able to tackle daily, seasonal, and peak loads. For instance, when the demand of electric falls, the reservoirs or dams store water while some installed electricity generators are used to store excess energy (Harvey and Brown 33). Biofuel production revolves around the fact that biofuel is a renewable source of energy. Biofuels have a source material and unlike oil, which often takes thousands of years for the fossil fuels to be produced, the biofuels are renewable because new crops can often be grown and the waste material collected for production of oil. Biofuel production has helped

Supply Chain Management Essay Example | Topics and Well Written Essays - 500 words - 6

Supply Chain Management - Essay Example However, there are many challenges that companies face while trying to improve supply chain management. One big challenge that they face is customer service, which means that ensuring that the products that a customer want are delivered at the right place and at the right time is a huge challenge for companies. This is made worse by the fact that the number of customers keeps on rising and meeting their needs is the only way they can maintain them because of the high competition in today’s market (RFID STUDY GROUP at Pennsylvania State University, 2006). The other challenge is cost control; this is because companies in order to improve their supply chain management have to find a way to control costs. These are hard tasks considering their operating costs are under a lot of pressure. These pressures that cause an upswing in operating costs rise from, regular technology upgrades and advancements to keep up with the competitors, global customers who require goods to be shipped to them, expansion in costs of healthcare and constant increase in commodity prices. These pressures are not under companies’ control and, therefore, controlling them becomes a very hard task that leads to operating costs of supply chain management being high. The other challenge is risk management and planning since supply chain management requires a lot of good planning and the right strategy for managing risks involved (W.K, P, & K.H, L, 2000). This is because this process has to be assessed periodically and its design has to keep on changing to ensure that market changes are accommodated. Companies have to identify risks and quantify as well as controlling them. There are constant changes in supply chain management such as introduction of new products to the market, new acquisition, new intellectual property to be protected, as well as maintenance of assets and security of shipping products. All these have to be planned and integrated prior to the process to

Advantages and disadvantages of the FairTax Act Term Paper - 2

Advantages and disadvantages of the FairTax Act - Term Paper Example In this regard, this essay will discuss the advantages and disadvantages of Fair Tax Act proposed in the U.S. To start with, the Fair Tax Act would result into several advantages to the citizens by using fair tax system. Firstly, the fair tax system is simple when compared to the existing system of taxation. One of the major aims of tax reforms is to simplify the taxation codes in order to save tax payers energy in terms of time and resources required to comply with tax returns (Garner, 2005). The existing federal taxation system is complex because of the many types of returns expected to be complied with making tax payers and even the government to incur extra expenses to acquire resources, such as documentations, that can help in compliance. In addition, different organizations have to higher financial experts to guide them in compliance to the federal tax code. Therefore, using a fair tax system would result into minimal usage of resources to comply with the taxation system hence saving the tax payers the additional costs associated with the existing tax code (Garner, 2005). Implementation of the Fair Tax Act would result into increased development in economic terms. According to Jokisch and Kotlikoff, implementation of the fair tax system would removes payroll taxes that reduce significant portions of generated income (2007). This makes sense because the fair tax plan taxes expenditure as opposed to the income thereby motivating people to work harder in order to generate more income for their personal development. In addition, the fact that the fair tax plan taxes consumption and not income encourages citizens to reduce their expenditure and increase on their savings something that indirectly stimulates economic growth. Lastly, the implementation of Fair Tax Act would result into ‘fairness’ in taxation of people or

New British Library And Bps Andrew Field Development Construction Essay

New British Library And Bps Andrew Field Development Construction Essay The construction industry is one of the best industry in the world for delivering excellence in result. In United Kingdom we have a fantastic heritage of excellence in construction going back to Victorian times with the remarkable achievements of great engineers. But there has long been a recognition that there is considerable scope for improvement in the way construction projects are delivered. Back in the 1980s clients complained about performance of the industry, the industry complained about clients and a strong belief that we the public were not getting value for money! The industry was characterised by poorly performing projects, dissatisfied clients, poor quality end product, adversarial relationships between buyers and suppliers, low profit margins and a claims culture, lack of investment in people and a poor health and safety record. Public sector project in particular were inevitably delivered late, costing far in excess of what was originally estimated, and often did not meet peoples expectations in terms of performance, aesthetics or lifecycle. To drive culture change we must move beyond construction to a broader vision of the built environment , leveraging performance in other parts of the economy to deliver better quality of life in housing, transport, health, educationà ¢Ã¢â€š ¬Ã‚ ¦..etc. Recognising that the relatively small up front construction cost has a big impact on overall business costs and ultimate value to the user. the social and environmental outcomes. Focus on the environment we must be a sustainability leader and adopt carbon efficiency. A green recovery from the current recession is required. Such that young people who want a better world can fulfil their aims by joining the industry to deliver a low carbon economy Find a cohesive voice for the industry. Institutions must collaborate to represent the industry to government and other stakeholders. Focus on how we can help reduce government costs Adopt new business models find ways to incentives long term value creation Develop new leaders who can communicate their vision and drive culture change Integrate education and training to promote a wider understanding of the built environment. Procure for value rather than lowest price procurement process needs to be more professionally managed Suppliers take the lead in demonstrating how they can create additional value New British Library Aim of British Library The aim of British Library is to serve scholarship, research and enterprise. Their purpose to promote the advancement in knowledge through the communication of information and ideas. In order to achieve this they identify and respond to users needs for a national library services; build, catalogue and conserve the collection; provide entry to the worlds knowledge base; provide leadership and initiate co-operative programmes for the national and international research library community; and exploit their collections in enterprising ways to raise support for their activities. Source: The British Library Corporate Plan 1995 Development of British Library The concept of British Library was established in 1982, the construction of first phase was started at St Pancras. At the early stage their was no budget for complete project and the cost approved phase by phase. This was not an efficient practice for management. In 1988 Minister was agreed for  £300 millions as a cash target for phase 1A and also  £150 millions for completion phase. In 1991, the former Committee of public Accounts were critical of the serious lapses in the management control and accountability of the project and elected the management arrangements to be monitored closely. The government accepted the main findings of committee and confirmed that the expected completion of new building will held on 1996 with in the cash limit of  £450 millions but in November minister increased cash limit to  £496 millions. It was expected that the whole building should be completed in 1996 but the completion and handover dates of phase 1A changed three times since July 1991, in 1993 phase 1A was planned for operational in the middle of the year but the phase was completed in November 1995 but no part of the building is now expected to open until October 1997.the completion target date of phase 1A was slipped because of identify and resolve technical problems with the book shelving, in order to find out how to deal with cabling damages during installation, how to deal with short comings in the fire protection systems, and to implement remedial works. BPs North Sea Andrew Field Development Proposed Idea Development In 1974 Andrew was discovered in 1974 in 230 km NE of Aberdeen in 115 m water depth, a relatively small complex reservoir, with estimated 112million barrels of oil and 3.8 billion cu m of gas. It was proposed for development a number of times between 1981 and 1988 but always commercially unattractive. By 1991 collaborative team work had solved the gas management plan incorporating gas export and re-injection into the reservoir. BP themselves were not sure of the steps needed to reach their goal and had to hold fast to their vision. They wanted the facilities contractors on board at the pre-sanction stage for them to establish an early sense of ownership and to work on reducing the unacceptably high cost estimate of  £450m. BP moved away from a traditional tendering process and developed a set of 10 new criteria the Minimum Conditions of Satisfaction (MCOS) against which they would judge prospective candidates. The tender document at only 50 pages was the slimmest ever produced for a major new Offshore development. Brown Root recognised that BP was serious and came up with its own response to BPs Minimum Conditions Of Satisfaction that would change behaviour and reduce cost foremost of these was an end to man to man marking on the project limiting the client team to 20 and truly integrating them was part of the delivery of the project. Contractors were cautious especially with the MCOS requiring that the development cost be limited to  £270m. Temporary grillage steelwork to support the structure during fabrication and load out was reduced from 1100T to 300T saving  £260k. An example of further cooperation between design and fabrication was that the design team produced drawings for fabrication. Usually 300 primary drawings would be produced. Instead only 30 were needed with all fabrication drawings directly produced from the CAD model saving 12000 man-hours. At sanction the estimated man hours for jacket fabrication were 580,000 which was reduced to 500,000 by reduction in work scope. However, by smarter working motivated by the cooperative atmosphere and culture of the Alliance, Andrews Jacket was built for less than 440,000 man hours. Sanction estimates, based on other typical projects, was 78 man hours/tonne The final outcome for Andrew was 66 man hours/tonne. As different contractors would be working under different payment methods reimbursed costs with fixed overhead and profit and fixed lump sum prices there was concern that although joint commitment was required under the risk and reward gain share system, one party might not have influence over another in achieving the target cost. Target cost finalised in Nov 93 at  £373m which included  £39m contingency approx 20% reduction in price had been achieved. And first oil 3 months early, by Sep 96 Way the Both Projects Delivered In the contrast of both the projects like ;New British Library and BPs North Sea Andrew Field Development s project both started almost on same time and having same magnitude of cost. In the case of British Library, time and cost of project both over runs. the performance and specification of complex systems need to be settle down early during design, the library believed that they were justified in revisiting basic features of the design when construction was well advanced. In their project they did not arranged quality people like architects and other professionals because they provide the financial incentive to complete projects on time and with in budget. there was unclear definition of responsibilities for inspections between Laing, the design team, and the clerks of works. Their had been insufficient planning, resulting in sufficient time being allowed for inspections. Guidance on handover procedures had been confused, their were poor identification and recording of items to be rectified or still outstanding. As a result, there had been uncertainty over the amount of work still to be done before an area could be handed over also uncertainty over what bookshelving contractors were contracted to provide: records of technical discussions and agreement were not readily accessible. As far as BPs North Sea Andrew Field Development s project was concern a totally integrated team approach was done with a gain share mechanism to share risk and reward. The idea of behavioural change as an essential ingredient for success had taken hold following feedback from another BP project which suggested that the much discussed benefits of alliancing could bear fruit if managed correctly. They defined their roles, strategies and principles. They concentrated on their performance and specification during the project. They delivered their project on time because they monitored the technical issues, accidental issues and weather issues that is why the project finish on time and with in the targeted cost as well Recommendations Bibliography Refrences Constructing the Team (The Latham Report) (July 1994) Rethinking Construction (The Egan Report) (Dec 1998) NAO Report HC362: Progress in Completing the New British Library (15 May 1996) Lecture notes for EPM 934 Lecture 5 (available on City Space)

Comparison And Contrast Of William Blakes Poems Essay -- essays resear

Comparison and Contrast of William Blake's Poems Introduction (Innocence) Piping down the valleys wild, Piping songs of pleasant glee, On a cloud I saw a child, And he laughing said to me: "Pipe a song about a lamb!" So I piped with merry chear. "Piper, pipe that song again;" So I piped, he wept to hear. "Drop thy pipe, thy happy pipe; Sing thy songs of happy chear:" So I sung the same again, While he wept with joy to hear. "Piper, sit thee down and write In a book, that all may read." So he vanish'd from my sight, And I pluck'd a hollow reed, And I made a rural pen, And I stain'd the water clear, And I wrote my happy songs Every child may joy to hear. Introduction (Experience) Hear the voice of the Bard! Who Present, Past, & Future, sees; Whose ears have heard The Holy Word That walk'd among the ancient trees, Calling the lapsed Soul, And weeping in the evening dew; That might controll The starry pole, And fallen, fallen light renew! "O Earth, O Earth, return! "Arise from out the dewy grass; "Night is worn, "And the morn "Rises from the slumberous mass. "Turn away no more; "Why wilt thou turn away? "The starry floor, "The wat'ry shore, "Is giv'n thee till the break of day." The Chimney Sweeper (Innocence) When my mother died I was very young, And my father sold me while yet my tongue Could scarcely cry "'weep! 'weep! 'weep! 'weep!" So your chimneys I sweep & in soot I sleep. There's little Tom Dacre, who cried when his head, That curl'd like a lamb's back, was shav'd: so I said "Hush, Tom! never mind it, for when your head's bare You know that the soot cannot spoil your white hair." And so he was quiet & that very night, As Tom was a-sleeping , he had such a sight! That thousands of sweepers, Dick, Joe, Ned & Jack, Were all of them lock'd up in coffins of black. And by came an Angel who had a bright key, And he open'd the coffins & set them free; The down a green plain leaping, laughing, they run, And wash in a river, and shine in the Sun. Then naked & white, all their bags left behind, They rise upon the clouds and sport in the wind; And the Angel told Tom, if he'd be a good boy, He'd have God for his father & never want joy. And so Tom awoke; and we rose in the dark, And got with our bags &a... ...and comfort, in 'Infant Sorrow' the baby is brought forth in pain and sorrow. At the center of Blake's thought are two conceptions of innocence and experience, 'the two contrary states of the human soul'. Innocence is the characteristic of the child, experience is the characteristic of the adult. (Characteristic, NOT the body)The Innocence poems deal with childhood as the symbol of an untarnished innocence which ought to be, but which in modern civilization cannot be. These poems all have a childlike directness and a sense of controlled joy in the human and natural world that show none of the signs of a grownup writing for children. In innocence, there are two factors. One is an assumption that the world was made for the benefit of human beings, and the other is ignorance to this world. As the child grows, his conscious mind accepts 'experience', or reality. His childhood innocence is forgotten and lost forever, for innocence is not knowing experience. Blake can wrote his innocence books before he had been exposed to the social injustices of his time. Also, one can write abo ut innocence from remembering it. However, living innocence, and writing about it are two different things. Comparison And Contrast Of William Blakes Poems Essay -- essays resear Comparison and Contrast of William Blake's Poems Introduction (Innocence) Piping down the valleys wild, Piping songs of pleasant glee, On a cloud I saw a child, And he laughing said to me: "Pipe a song about a lamb!" So I piped with merry chear. "Piper, pipe that song again;" So I piped, he wept to hear. "Drop thy pipe, thy happy pipe; Sing thy songs of happy chear:" So I sung the same again, While he wept with joy to hear. "Piper, sit thee down and write In a book, that all may read." So he vanish'd from my sight, And I pluck'd a hollow reed, And I made a rural pen, And I stain'd the water clear, And I wrote my happy songs Every child may joy to hear. Introduction (Experience) Hear the voice of the Bard! Who Present, Past, & Future, sees; Whose ears have heard The Holy Word That walk'd among the ancient trees, Calling the lapsed Soul, And weeping in the evening dew; That might controll The starry pole, And fallen, fallen light renew! "O Earth, O Earth, return! "Arise from out the dewy grass; "Night is worn, "And the morn "Rises from the slumberous mass. "Turn away no more; "Why wilt thou turn away? "The starry floor, "The wat'ry shore, "Is giv'n thee till the break of day." The Chimney Sweeper (Innocence) When my mother died I was very young, And my father sold me while yet my tongue Could scarcely cry "'weep! 'weep! 'weep! 'weep!" So your chimneys I sweep & in soot I sleep. There's little Tom Dacre, who cried when his head, That curl'd like a lamb's back, was shav'd: so I said "Hush, Tom! never mind it, for when your head's bare You know that the soot cannot spoil your white hair." And so he was quiet & that very night, As Tom was a-sleeping , he had such a sight! That thousands of sweepers, Dick, Joe, Ned & Jack, Were all of them lock'd up in coffins of black. And by came an Angel who had a bright key, And he open'd the coffins & set them free; The down a green plain leaping, laughing, they run, And wash in a river, and shine in the Sun. Then naked & white, all their bags left behind, They rise upon the clouds and sport in the wind; And the Angel told Tom, if he'd be a good boy, He'd have God for his father & never want joy. And so Tom awoke; and we rose in the dark, And got with our bags &a... ...and comfort, in 'Infant Sorrow' the baby is brought forth in pain and sorrow. At the center of Blake's thought are two conceptions of innocence and experience, 'the two contrary states of the human soul'. Innocence is the characteristic of the child, experience is the characteristic of the adult. (Characteristic, NOT the body)The Innocence poems deal with childhood as the symbol of an untarnished innocence which ought to be, but which in modern civilization cannot be. These poems all have a childlike directness and a sense of controlled joy in the human and natural world that show none of the signs of a grownup writing for children. In innocence, there are two factors. One is an assumption that the world was made for the benefit of human beings, and the other is ignorance to this world. As the child grows, his conscious mind accepts 'experience', or reality. His childhood innocence is forgotten and lost forever, for innocence is not knowing experience. Blake can wrote his innocence books before he had been exposed to the social injustices of his time. Also, one can write abo ut innocence from remembering it. However, living innocence, and writing about it are two different things.

Dishonest salespeople and gossip Essay

No matter what culture one belongs, common observation shows that women â€Å"gossip† while men â€Å"talk shop†; women are â€Å"bossy† and men are â€Å"firm† (Women’s Language, 2005). However, even if common observation shows that women talk more than men, research findings prove otherwise. In fact, findings would even show that â€Å"men have been shown to talk more than women in settings as diverse as staff meetings, television panel discussions and husband-and-wife pairs in spontaneous conversation† (Women’s Language, 2005). As men tend to talk about â€Å"male things† like politics, sports, cars, women talk about the â€Å"women things† such as child-rearing, household chores and some personal relationships. According to Pamela Fishman’s research studies, women are relatively weak in interactive situations because they tend to â€Å"exploit questions and answers in order to force a response and keep the conversation going† (Women’s Language, 2005). Therefore, â€Å"gossiping† is common and universal. People always love to hear something about the other person who is not on the scene of conversation. What about dishonest salespeople? (rhetorical question) Are these people more disgusting than those who gossip? Looking at the gravity of damage which one causes more harm?   Looking at the gravity between the results, which causes greater damage? Looking at the gravity of the situation, it seems that gossiping is the most destructive trait here. (parallelism). But of course, people will not discount the fact that dishonesty in sales is also a bad trait. For one, not all incidents of dishonesty are detected and not all detected cases are reported. Therefore any fraud statistic is an estimate. Nevertheless, the statistics make it clear that dishonesty in salespeople occurs frequently, and no organization is immune (Peterson & Zikmund, 2004). The costs of fraud and dishonesty will continue to rise unless auditors, management, and the general public become more proactive in learning about the types of fraud, the perpetrators and valuable fraud prevention and detection techniques (Bezanis, 2002). It is important to be able to know the difference between the real and spurious products in order to maintain the good image of that company. Fraud is conventionally defined as â€Å"intentional deception, deceitful pretenses, or deliberate trickery to gain an advantage† (Hanlin, 2004). Fraud encompasses an array of irregularities and illegal acts characterized by intentional deception. Every fraud involves three elements: (1) theft act, (2) concealment, and (3) conversion (Albrecht & Albrecht, 2001). For instance, buyers who get the misfortune of buying fake Gucci bags are able to identify the fake product because of the flimsy hardware, cheap leather and misspelled logos. The fake bags are so like the originals that it is hard to spot them quickly. There are businessmen who are able to copy the smart way. High-end label bags cost around $500 to over $1,000. Anything less than these price ranges are fake. Buyers are also encouraged to read the fine print so that they do not buy those that says, â€Å"Designer Inspired.† The numerous issues which plague the business sector with allegations and prosecution of unethical conduct easily fall under either the definition of fraud or unfair and deceptive practices. Or if the issue does not fit with the two terms, it can fall under unethical business conduct. The unethical conduct is a catchall phrase that includes fraud and unfair practice and other aspects beyond the scope of the two terms. In the same manner, gossip is also an unethical business indulged by people regarding other people. However, gossip causes hurt. It can hurt people and damage lives. Thus, gossip, depending on the seriousness can be extremely dangerous too. It can damage a person’s reputation and image. In the long run, gossip seems to be more damaging than dishonest salespeople because one can always return a fake product. But the destruction one causes in gossip spreads like wildfire and cannot be restored. As defined, ethical business conduct is doing something that is not required by law, contract, or other obligation and which is a positive contribution to society. Therefore, a contrary conduct is unethical. This means doing something which is prohibited by law, contract, or other obligation or which has a negative contribution to society. Contribution to society is now part of the definition because ethical business conduct has evolved into what is termed as corporate and social responsibility. An act of the company has a vast effect on the society as a whole. In the course of human interactions, there are many situations in which it is difficult to make a decision because values come into conflict. It is essential that an individual or an organization engage in values clarification to develop a personal decision-making process that fosters ethical behavior.

An Introduction to Present Participles and Gerunds

An Introduction to Present Participles and Gerunds Things arent always what they seem. For instance, although weve known for centuries that the sun doesnt move around the earth, we still use the expression rising sun. And even though rise is ordinarily a verb, in this expression (with the -ing ending) it functions more like an adjective, modifying the noun sun. To top things off, we call rising a present participle, yet present participles dont really tell us much about time (past, present, or future). Leaving the astronomical issues to Neil deGrasse Tyson, well stick to English grammar. In particular, the question What is a present participle? In one respect, the present participle is a simple, straightforward construction. Whether rising or setting, eating or drinking, laughing  or  crying, waking or sleeping,  its formed by adding -ing to the base form of a verb. No exceptions. After that, however, it gets a little more complicated. For one thing, the label is misleading. Its true that the present participle (in the following example, sleeping)  sometimes seems  to indicate present time: He looks at the sleeping  baby. But when the tense of the main verb changes to the simple past, the time of the present participle appears to change right along with it: He looked at the sleeping  baby. And when the main verb points to the future, the present participle again tags along: He will look at the sleeping  baby. The truth is, the present participle really doesnt mark time at all. That job is reserved for the main verb and its auxiliaries  (looks, looked, will look). And for this reason, among others, many linguists prefer to use the term -ing form rather than present participle. The Multiple Personalities of Present Participles Weve already seen another peculiarity of the present participle (or -ing form): it has multiple personalities. Though based on a verb, the present participle often works as an adjective. In our examples so far, the present participle sleeping  modifies the noun baby.  But thats not always the case. Consider how the -ing words are used in this quotation, variously attributed to Confucius, Ralph Waldo Emerson, Vince Lombardi, and American Idol veteran Clay Aiken: Our greatest glory is not in never falling but in rising every time we fall. Both falling and rising function here as nouns - specifically, as objects of the preposition in. When a verb plus -ing does the job of a noun, it reveals its secret identity as a gerund,  or verbal noun. (The term verbal, by the way, refers to any verb form that serves in a sentence as a noun or a modifier,  rather than as a verb).   Then again, when an -ing word is combined with a form of the auxiliary verb to be, it functions (once again) as a verb: The price of oil is rising. This construction is called the progressive, which in fact is the most common use of the present participle in English. The present progressive is made up of a present form of to be plus a present participle (is rising). The past progressive is made up of a past form of to be plus a present participle (was rising). And the future progressive is made up of the verb phrase will be plus a present participle (will be rising).   Source Our Greatest Glory Is Not in Never Falling, But in Rising Every Time We Fall. Quote Investigator, May 27, 2014.

Geology of the earth essays

Geology of the earth essays Geologists have looked at many different ways of trying to understand the internal structure of our earth, but each piece of evidence on their own is questionable. It is when geologists take all the evidence they have uncovered and put it all together that they find all the pieces of evidence relate to each other and overlap. So, even though we cannot dig deep enough to physically witness the inside of our earth, geologists have been able to provide, with evidence, what the internal structure of the earth compromises of. The Earth formed from the solar nebular (gas and dust cloud) a certain distance from the sun. The solar wind, the radiation from the sun, carried different elements, different distances from the sun, i.e. light elements like H and He get carried a long distance away, where they form the gas giants such as Jupiter etc. Heavy elements like Fe, Ni, Mg, Ca and Si didnt get blown as far away and therefore the inner planets are mostly rocky material made up of Fe, Ni, Ca and Si oxides. Continuing on from the above point, geologists can also look at the differentiation of materials in the earth. The starting chemistry of Fe, Ni, Ca and Si has been strongly affected by other processes. Firstly, gravity has pulled the dense Fe and Ni towards the centre of the earth, and consequently given us the core. Secondly, the constant melting and crystallisation of volcanic rocks near the centre of the earth has altered the chemistry of the outer earth and helped it divide into layers, in this case, the oceanic and continental crust. The first piece of evidence geologists could look at in order to help gain a good understanding of the earths internal structure is the fact that there is a magnetic field around the earth. From this, geologists concluded that the internal structure must contain iron, as it is iron which provides magnetism. ...

Difference between an Entrepreneur and an Intrapreneur Assignment

Difference between an Entrepreneur and an Intrapreneur - Assignment Example Entrepreneurs are bold risk-takers. The new business may be profitable or may turn out to be loss-making. Their level of risk is extremely high as there is no-one else to share the burden, which can literally ‘make’ or ‘break’ them. Intrapreneurs are low-level risk-takers. In their role as employees of a business, their amount of risk-taking is limited by boundaries laid out in advance; they are not permitted to exceed those limits when conducting negotiations that could pose risks to the business. Entrepreneurs have clear visions for their new businesses; they are dogged, determined and rigid about their visions, and respond negatively to any alteration proposals. Intrapreneurs have their own visions about ways to develop the business, but such visions are flexible and adaptable in response to organizational shifts. Entrepreneurs are persons who possess a wide range of skills in different fields. They are termed as ‘generalists.’ Intrapreneurs are ‘specialists’ who possess highly trained managerial skills that enable them to concentrate on ways to improve and develop the business (Lifecollege.org). The three forms of management are autocratic, consultative and democratic. Autocratic managers are persons within the organization with total decision-making powers. They give dictatorial instructions to staff members without bothering to ask their opinion on the matter in hand. Consultative managers take final business decisions, but only after soliciting opinions of other employees and analyzing the matter in hand from the perspective of those views. Democratic managers hand over authority to staff members to finish a task allotted to them. The staff members then proceed to complete the given task on time by employing their own set of work techniques. The staff members are part of the decision-making process.

Gender Inequality on Women in the Workplace Thesis

Gender Inequality on Women in the Workplace - Thesis Example Studies have revealed that such gender inequality have grave effects on women’s perceptions of their efficiency and motivation. Some women fall into the trap of giving in to bleak self-fulfilling prophecies that they are not as good as their male co-workers and eventually prove the expectations to be right. This research paper explores the perceptions of women workers of the realities in the workplace regarding gender equality. It will attempt to investigate the grievances and fulfillments of women regarding their current jobs, pay and career advancement and probe the psychological and emotional effects these have on their job performance and motivation. It is hypothesized that gender inequality exists in workplaces, especially in bigger companies. This is exhibited by a large pay discrepancy between men and women who hold the same position and job descriptions. This study will investigate the workers’ perception of gender inequality across the board. The hypothesis will be: Due to the significance of equal opportunities to citizens the world over, laws have been passed to ensure that they are available to everyone. These laws have been designed protect anyone from being discriminated against by reason of sex, marital status, ethnic or national origin, color, race, nationality, age, disability, religion, and differing terms of employment, including pay for jobs of equal value. 1 In the United Kingdom, the Sex Discrimination Act 1975 (amended 1986 and in the Employment Act 1989) makes it unlawful to discriminate in terms of gender who is offered the job; opportunities for promotion, transfer and training. (Equal Opportunities Management Guidelines) Â