Preventing Noise Induced Hearing Loss in Children Essay

Preventing Noise Induced Hearing Loss in Children - Essay Example The loss is fairly gradual, so it may not be noticed immediately. The amount of hearing lost depends on the intensity of the sound, the duration of the sound, and how often the person experiences the sound. Hearing loss can be long term, or short term, depending on the above three instances. Once hearing loss has happened, however, there is no way to cure what has happened. In "Noise Induced Hearing Loss in Children: what Educators Need to Know", by Anne Kathryn Haller and Judy K. Montgomery, they describe the effect that noise induced hearing loss has had on American society. Nearly one third of Americans with hearing loss can link their decreased hearing ability to noise (Haller 29). Over time, it has moved to the number two cause of hearing loss, after age-related hearing loss. According to Haller, "nearly thirty million people are estimated to be exposed to injurious levels of noise each day" (30). What is worse is that many of these people are children. For children, loss of hearing carries a greater penalty then loss of hearing for adults has. Children are still learning how to use language, and a loss of hearing can negatively impact their ability to communicate, understand and learn language (Holler 2004). In the article, to prevent these problems in schools, Holler suggests having regular assessments of noise in schools, keeping noise in cafet erias and gymnasiums as low as possible, encouraging students to use personal hearing protectors, and regular screening of students for hearing loss, so that it can be caught and treated early (Holler 2004). In "The Effectiveness of an Interactive Hearing Conservation Program for Children," by Gail D. Chermak, Lori Curtis and J. Anthony Seikel, the researchers looked at recent increases in hearing loss in children and possible causes and solutions. They determined that of children with hearing loss, the majority of them are boys ages ten and older who have diminished their hearing in leisure activity (Chermok 1). Their study primarily looked at the effectiveness of hearing education for children in elementary school, and its long term effect on the children's responses to situations involving excessive noise. They presented to children two one hour sessions in which they were asked first what they knew about hearing and hearing loss in a questionnaire, and then were taught how to recognize situations of excessive noise, and how to protect their own hearing in those situations. Results suggested that this education significantly increased the children's knowledge of hearing and hearing l oss, and also increased the children's likelihood to use preventive and protective measures when around excessive noise. In the third article, "Hearing Conservation Education Programs for Children: A Review," by Robert L. Folmar, Susan E. Griest, and William Hal Martin, current efforts to protect children's hearing are reviewed, in order to provide a comprehensive source for educators. They found twelve programs whose primary goal was to educate about hearing loss, and an additional seventeen whose specifically looked at children and

Fifth Hour #3 Essay Example | Topics and Well Written Essays - 250 words

Fifth Hour #3 - Essay Example What was critical at the point of grief is offering comfort, consolations and explanations. Sometimes the bereaved obsessively ruminate some events which led to the death or loss and ended up blaming themselves or other people for it. This may end up bringing major depressions to the bereaved especially those who were close to the deceased like husband or wife in the first few months. Hallucinatory experiences may also come up. Incase of complicated grief like unresolved, post- traumatic stress disorder (PSTD); some distinct treatment may be required to relief the person. What I thought was important subject of the event is the therapy offered to the bereaved. For instance, sometimes the bereaved had symptoms like intrusive thoughts and images of the deceased which led to painful yearning for the presence of the dead, denying the death, desperate loneliness, bitterness, and anger. In such cases, the bereaved told the story of the death from time to time and listened to tapes of the r ecitations. This aided the people to accept the death. The bereaved were also let to learn to confront thoughts and situations they have been avoiding. It was also important to evoke happy memories and uphold imaginary conversations with the bereaved under the guidance of a

Spin Coherent State in Real Parameterization SU(4)

Spin Coherent State in Real Parameterization SU(4) Coherent states in SU(4) of spin systems and calculate the Berry phase for qudit with spin 3/2 particle in SU(4) in quantum mechanics Yadollah Farahmand*, ZABIALAH HEIDARNEZHAD**, Fatemeh Heidarnezhad***, Fatemeh Heydari*** and Kh . Kh Muminov* Abstract In this paper, we develop the formulation of the spin coherent state in real parameterization SU(4).we obtain Berry phase from Schrdinger equation. For vector states, basic kets are coherent states in real parameterization. Wecalculate Berry phase for qudit with spin S=3/2 in SU(3) group and Berry phase. Key words: quantum mechanics, Schrdinger equation ,coherent state ,SU(n)group , Quadrupole moment , Berry phase. Introduction In 1984 Berry published a paper [1] which has until now deeply influenced the physical community. In mechanics (including classical mechanics as well as quantum mechanics), theGeometric phase, or the Pancharatnam-Berry phase (named after S. Pancharatnam and Sir Michael Berry), also known as the Pancharatnam phase or, more commonly, Berry phase[2], Therein he considers cyclic evolutions of systems under special conditions, namely adiabatic ones. He finds that an additional phase factor occursin contrast to the well-known dynamical phase factor. is a phase acquired over the course of a cycle, when the system is subjected to cyclic adiabatic processes, resulting from the geometrical properties of the parameter space of the Hamiltonian. Apart from quantum mechanics, it arises in a variety of other wave systems, such as classical optics [3].As a rule of thumb, it occurs when ever there are at least two parameters affecting a wave, in the vicinity of some sort of singularity or some sort o f hole in the topology. In nonrelativistic quantum mechanics, the state of a system is described by the vector of the Hilbert space (the wave function) ∈ H which depends on time and some set of other variables depending on the considered problem. The evolution of a quantum system in time t is described by the Schrodinger equation We consider a quantum system described by a Hamiltonian H that depends ona multidimensional real parameter R which parameterizes the environment of the system. The time evolution is described by the timedependent Schrodinger equation We can choose at any instant a basis of eigen statesfor the Hamiltonian labelled by the quantum number n such that the eigen value equation is fulfilled We assume that the energy spectrum of H is discrete, that the eigen values are not degenerated and that no level crossing occurs during the evolution. Suppose the environment and therefore R(t) is adiabatically varied, that means the changes happen slowly in time compared to the characteristic time scale of the system. The system starts in the n-the nergy eigen state then according to the adiabatic theorem the system stays over the whole evolution in the n-the igen state of the instant Hamiltonian. But it is possible that the state gains some phase factor which does not affect the physical state. Therefore the state of the system can be written as One would expect that this phase factor is identical with the dynamical phase factorwhich is the integral over the energy eigenvalues but it is not forbidden by the adiabatic theorem and the Schrodinger equation to add another term which is called the Berry phase [4-8] We can determine this additional term by inserting the an sat z (4) together with equation (6) into the Schrodinger equation (1). This yields with the simplifying notation R ≠¡R(t) After taking the inner product (which should be normalized) with we get and after the integration where we introduced the notation Then the total change in the phase of the wave function is equal to theintegra The respective local form of the curvature has only two nonzero components: The expression for the Berry phase (14) can be rewritten as a surface integral of the components of the local curvature form. Using Stokes formulae, we obtain the following expression where S is a surface in and are components of the local curvature form .[9] Berrys phase for coherent state in SU(4) group for a spin particle (qudit) We consider reference state as for a spin-3/2 particle (qudit) in SU(4) in nonrelativistic quantum mechanics. Coherent state in real parameter in this group is in the following form [10-12] where |0i is reference state and is Wigner function. Quadrupole moment is Octupole moment is If we insert all above calculation in coherent state, obtain: Discussion Geometric phases are important in quantum physics and are now central to fault tolerant quantum computation. We have presented a detailed analysis of geometrical phase that can arise within general representations of coherent states in real parameterization in SU(4). Berry phase also change in similar method. We can continues this method to obtain Berry phase in SU(N) group, where N ≠¥ 5 . we can also obtain Berry phase from complex variable base ket, we conclusion that result in two different base ket is similar. Berry phase application in optic, magnetic resonance, molecular and atomic physics [13,14] . References [1] M. V. Berry, â€Å"Quantal phase factors accompanying adiabatic changes,†Proc.R. Soc. Lond. A 392 (1984) 45–57. [2] S. Pancharatnam, Proc. Ind. Acad. Sci. A44, 247-262 (1956). [3] M.V. Berry, J. Mod. Optics 34, 1401-1407 (1987). [4] M. V. Berry. Quantal phase factors accompanying adiabatic changes. Proc. Roy. Soc. London, A329(1802):45-57, (1984). [5] J. J. Sakurai. Modern quantum mechanics, (1999). [6] Yadollah Farahmand, Zabialah Heidarnezhad, Fatemeh Heidarnezhad, Kh Kh Muminov, Fatemeh Heydari, A Study of Quantum Information and Quantum Computers. Orient J Chem., Vol. 30 (2), Pg. 601-606 ( 2014) [7] Yadollah Farahmand, Zabialah Heidarnezhad, Fatemeh Heidarnezhad, Fatemeh Heydari, Kh Kh Muminov, Presentation Quantum Computation Based on Many Level Quantum System and SU(n) Cohered States and Qubit, Qutrit and Qubit Using Nuclear Magnetic Resonance Technique and Nuclear Quadrupole Resonance. Chem Sci Trans.,vol 3(4), 1432-1440(2014) [8] Yadollah Farahmand, Zabialah Heidarnezhad, Fatemeh Heidarnezhad, Fatemeh Heydari, Kh Kh Muminov,Seyedeh Zeinab Hoosseinirad, Presentation Entanglemen States and its Application in Quantum Computation. Orient J Chem., Vol. 30 (2), Pg. 821-826 ( 2014) [9] M. O. Katanaev, arXiv:0909.0370v2 [math-ph] 18 Nov (2009). [10] V.S. Ostrovskii, Sov. Phys. JETP 64(5), 999, (1986). [11] Kh. O. Abdulloev, Kh. Kh. Muminov. Coherent states of SU(4) group  in real parameterization and Hamiltonian equations of motion. Reports of  Tajikistan Academy of science V.36, N6, I993 (in Russian). [12] Kh. O. Abdulloev, Kh. Kh. Muminov. Accounting of quadrupole dynamics  of magnets with spin . Proceedings of Tajikistan Academy of Sciences, N.1,  1994, P.P. 28-30 (in Russian). [13] T. Bitter and D. Dubbers. Manifestation of berry,s topology phase in neutron  spin rotation. Phys. Rev. Lett, 59:251-254, (1987). [14] D. Suter, Gerard. C, Chingas, Robert. A, Harris and A. Pines, Molecular  Phys, 1987, V. 61, NO. 6, 1327-1340.

GM Financial :: essays research papers

Financial Information GM dealers sold 558,092 cars and trucks in June of 2005 up 41% compared to June of 2004. Gm had the best monthly sales since September 1986. The calendar year to date sales are up 2.5% for the 2005 year. Sales were spiked by GMs â€Å"Employee discount for everyone.† â€Å"We are confident that are employee discount program would hit a responsive cord, but we were a little surprised by just how strong the results were, including bringing over one hundred and fifty thousand new customers into the GM family in June. This definitely moves us in the right direction as we gear to introduce our 2006 models,† says Mark LaNeve, GM vice president of sales and marketing.   Ã‚  Ã‚  Ã‚  Ã‚  GM of North America in June of 2005 produced 416,000 vehicles compared to 482,000 vehicles in June of 2004. GM had too much inventory and had to run an incentive program that worked. Globally GM has been an industry leader since 1931 and was founded in 1908. GM employs 321,000 individuals world wide. GM has Manufacturing operations in 32 countries and sells vehicles in 200 countries. In 2004 GM sold nearly 9 million vehicles globally. GM was up nearly 4% and posted its second highest total in company history.   Ã‚  Ã‚  Ã‚  Ã‚  Incentives are ran by a company to try and entice a customer to purchase a vehicle. It is a temporary jump start for sales. The last couple years consumers have expect low rates but now GM throws out the employee pricing. Consumer would let the incentives break the tie on which vehicle to purchase. This day in age everyone has low rates ,cash rebates but now employee discount, good thing GM was the leader of the pack.   Ã‚  Ã‚  Ã‚  Ã‚  The financial outlook for present GM is superb and the employee discount drastically sparked sales for a temporary time period. The reason GM had to run an incentive program was the cause of abundance of Inventory and employees are too expensive to maintain. (Pension, benefits†¦..) Gm had an increase in finished product, service parts, etc†¦ between 2003 and 2004 in other words, total inventories increased by nearly one million dollars, as sales decreased during that time period. GM has also seen a rise in healthcare and other benefits in the United States. In 2004 GM had an obligation expense 89,384 million which GM had to pay for its current employees and past employees for the year in benefits.

Metapath Case Essay

Metapath was a hi-tech company providing software products for wireless carriers. It had a revenue of 22 million and was emerging as the premier company in its market space. The ultimate goal of the founder, Hansen, was to see the Metapath go IPO in two years. However, this company confronted two main obstacles for that goal: concentrated customers and fluctuant quarterly revenues. To expand his business and also solve these problems, Hansen need to again raise more money. Like most of the software companies, Metapath demands continuously money supply during the premature period of its life. The main financial strategy of Metaph was to raise several rounds of money by turning to venture capital investors: get money from them in exchange for Metapath’s preferred stock and a promise to redeem or convert to commom stock in event of IPO. It had raised $ 9 million in four rounds of financing before 1997, in which STI and Bessemer participated in the first two rounds. Unlike the fol lowing standard convertible preferred stock instruments, these first two rounds had a structure called â€Å"straight redeemable, cheap common†, which required a principal payment in the future, making the two classes of preferred stock more like debts. Therefore, by paying yearly (or quarterly) dividends and guarantying the safety of principle value to venture investors, Metapath raised its first four rounds of capital. Selling the company to CellTech could bring Metapath many advantages. First, CellTech offered an attractive price $115 million, relatively large for a premature company with revenue of 25.6 million and negative income -$1.9 million. Second, it was already an public company, which prevented the dilution of possible further financings. Third, by merging with CellTech, Metapath could achieve synergy from expertise of CellTech’s engineers, and the fully-formed marketing and domestic sales organization. However, since the merging was plan to be in stock exchange and CellTech had gone public only few months, information could be limited to value its stock price fairly. Also in the big environment of late 1990s, too much investments in high-tech companies made this industry overheated, and CellTech could be overvalued by analysts. For the VC option RSC offered, one big advantage was that the immediate cash flow of $11.75 million, which would be very helpful for Metapath’s operation. Another advantage was that it bought time for Metapath to initiate an independent IPO in the future, which had potential to worth more than CallTech offered. But it brought  concerns to Metapath as well. RSC brought up the strike term called â€Å"participating convertible preferred stock†, at which holder could not only convert from the preferred stock, but also in the event of sale, receive face value and participate in further consideration of common stock. This term could make a sale of Metapath extremely dilutive to the founders.

Marketing Career Paper

A marketing manager had the duty of overseeing all marketing, advertising, and promotional activities, as well as staff. They are also the people who create marketing strategies and meet organizational objectives. A must for the job is being able to evaluate customer research, the conditions of the market, the competitor’s data and must be able to change and implement a marketing plan. A marketing manager, overall, is the leader of the business’s marketing organization.All the jobs performed by a marketing manager require knowledge of the field, people skills, and problem solving skills. It is not a job where one learns on the job, one must know the skills before you start. The average salary of a marketing manager is $107,610. One can work their way to making $138,470. The hours may vary for this job position. They work the average forty hours a week, plus some. With all their job requirements, they are expected to work extra to solve any problems or work on any projec t.One may also have to travel quite a bit. To become a project manager there are no set requirements and/or qualifications for the position. This are is becoming very popular and has made the market for this job very competitive. It would be wise to obtain a degree, such as a masters in business or a CIM (Chartered Institute of Marketing) certification. It would also be good to have â€Å"extensive experience in other marketing positions,† as well as having been a product manager.IT literacy is also a must. Although these can help one obtain the job, one does not have to have a certain amount of years or experience to become a product manager. The hours are varied and one must have a lot of commitment to do this job well. One must be willing to let go of certain activities. The pay, however, is very good. One must out way the positives and negatives of this job to decide if they are willing to put the hours in to succeed at this job.

Moby Dick Analysis Essays

Moby Dick Analysis Essays Moby Dick Analysis Paper Moby Dick Analysis Paper 11 Nov. 2008. Web. 13 Dec 2010. Nick Selby. â€Å"Herman Melville, Moby Dick. † Columbia University Press, 1999 William S. Gleim. â€Å"The Meaning of Moby Dick. † Kessinger Publishing, 2006