Report On Online Shopping System Information

Report On Online Shopping System Information The online shopping system is fast gaining media for to sale or purchase items from anywhere and anytime. It is basically based on Internet, It is related with B2C (Business to Customer) model and status of the design and development of e-commerce platform. It can not only save the operating costs of enterprises as well as save the time of customer to go shopping at mall and it is increasing the efficiency of business. This document show the status of Online Shopping System and development background and then introduces or discusses the system design, system objectives, system requirements and overall all phases of development or implementation of system. This system provides good facilities to users with GUI forms to registration, shopping cart management, and information modify etc. for customer. It has also provided some facilities to Admin as add item, update item and etc. It has been designed with B/S three tier structures, JSP technology for dynamic page design and for system security and code reuse the JavaBeans has used. And for better communication between system and easy to access, as well as to store large data of the database has used MSSql Server 2000. In this basically the two user one is Admin who can add item, update item control over the database or the management of customer information and keep security over the information of the customer as well as products. Second is customer who access the site for his requirement, he can register, search or see the products, details of products and comment for product and can do secure transactions over the internet. Chapter 1: Introduction What I am going to do? In the proposed system , as discuss in the abstract we are going to develop the new website Online Shopping System for computer products. In the website I followed the software development methodology called incremental approach nad according to it the system is mainly divided inot the two kinds of users and three kinds of mechanisms in order to make more sutaible for the end users to fulfill their all requirments from one place with quick and in more understandable manner. Here two kinds of users are Admin and End user means customer. In addition to this, three kinds of methods which considered here are NetUI means make available access to the end users for everything from the net which is developed with help of JSP and HTML, second one is the database which used to store large amount of data and easily can retrieve,update etc, and last one is the controls used for the same. Thus here we followed the model based UI desing approach. The important things which we added with this websi te is the latest product with latest configuration customer can choose as per configuration of that product, external devices, security for transcation, customer can send their view or comment and many more. Background In the current world the rapid development of Internet, the Internet has expressly become the best and fast media for collecting information, communication as well as entered into the commerce means selling, purchasing etc. So e-commerce became more popular and more businesses build an online store to show consumers a new shopping concept. Online shopping system as B2B, B2C, C2C ecommerce front-end business platform, the whole process of its business activities plays an important roles. In this site or system, consideration is how to build a B2C Online Shopping System. Online shopping is a kind of interactive features business information which provides users with two types of static and dynamic information resources. The static information are those that change frequently or later that resources, sucha as company profile, management practices and corporate systems etc. Dynamic information is subject to change information, such as commodity quotes, meeting arrangements, and training information. Online shopping system has powerful interactive features to enables businesses and users to easily transfer inoformation to complete e-commerce transactions. This new inter-company transactions to achieve the paperless exchange of documents and funds. Technologies Selection and Justification Following is description of technologies which are used for the website work: 1.3.1 Hardware/Software Requirements Software specifications Hardware specifications: Hardware Minimum Requirement Microprocessor Intel 3.1GHz processor or onwards Random Access Memory (RAM) 512 MB RAM. Hard Disk Drive 20GB (min. free useable disk space). 1.3.2 Technology Description 1) JSP: As there are number of acronyms with which the Internet is packed, another one is JSP. Here the JSP is standing for the Java Server Pages, but ità ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s commonly known as the JSP. JSP is nothing but the scripting language and very much similar to the ASP, PHP languages. Using the JSP, contents in the website are generated dynamically which allowing the rather than only statically as with the HTML. There are many free hosting available for the JSP websites because of the reason is that JSP is free and open source, simple, robust. There are other web development technologies also available now days such as PHP, ASP.net etc. But we encountered some problems with such technologies which are presented in following justification for the same: JSP over PHP: Both (JSP PHP) is web technologies are strong. For the most of the enterprise level applications JSP is better way to do because of its security, stability, speed of execution etc and more are the advantages of JSP. We encountered the problem with the PHP is that it becomes not more secure as compare JSP. As compared to the PHP, JSP is more rapid tool for the development of websites, once we know it, we can design any kind of pages which seems to us harder with the PHP because PHP is harder and also fewer objects oriented than JSP. Using JSP, we can develop web application quick by maintaining the level of performance, security for the same. JSP over ASP.NET: ASP.NET is come with the Microsoft product in the VS framework which is also one of the better way to designs and develop our websites, but the problem with such technology is that it is available only commercially means not freely as the JSP. As the we are getting same performances from the JSP as from the ASP.net, then ità ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s enough to decide to go with the JSP. Apart from this, there some other advantages which of JSP over the ASP.NET we observed such as: Freely Avaliable and Platform independent. Hosting is Cheply available. Web Server for JSP is free. If OS is Linux, no need to pay for the antivirus softwares. Rapid development. 2) MSSql Server 2000: One of the powerful is MSSql. There are many other powerful databases such as Oracle, Mysql etc are available. But while selecting MSSql database, there are two things which were addressed as compared to Oracle as well as MySql as: database which is best suitable with the JSP and another one is database which have fast speed to retrieve, update or communication with data. While with Oracle, MySqlserver there lot of extra efforts needs to be done before setting up the web application, the MSSql database is easy database with the high reliability, fast performance, and easy to use. Project Plan Thus as we used the incremental methodology of the software development, this project is divided into the different phases like requirement analysis phase, designing phase, development phase, deployment phase, testing phase etc. Following chart shows the overview of the proposed project plan with their time durations. Phases in Website Development In this section, some of the quality planes which are considered in order to maintain the quality of the proposed website. The major quality measure which we considered for the website is the proper validation for different things and response time of the proposed website because on the basis of this customers attraction is depends. Following is the brief explanation of these terms: 1) HTML Validation Using this validation we can check the document correctness against the DOCTYPE which is declared. On the basis of this various kinds of reports generated if there are any bugs with it. 2) Validating Links This is one important issue with the websites. Links of the website are checked against the all links given in the website whether they are working according to the specification given. 3) Validating Accessibility This is the most important activity which must be included in every website quality planning. It is not enough only to make the website, because people from different places, with different platforms accessing our website. The initiative of web accessibility is the maintaining the resources list which will help in order to designing the websites which will accessible. 4) Response Time For the websites like proposed one ità ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s necessary to check up with the response time of server because with websites several shopping transactions need to be done. Chapter 2: Software Development Methodologies 2.1 Types of Methodologies The mechanism of methodology is mainly composed of the one or more techniques in conjunction with the one of the models of software development. The prototyping techniques, object oriented techniques which are the multiple ways in order to implement the models such as incremental, waterfall and spiral models. During the single project such kinds of mechanisms are matched as well as mixed. Thus the methodology = techniques + models. Following are different kinds of methodologies which are prepared on the basis of combination of techniques as well as models: 1) Waterfall Model (Life Cycle) 2) Prototyping Model (Life Cycle) 3) Iterative Enhancement Model 4) Incremental Model 5) The Spiral Model 6) Object Oriented Methodology In the next section, we will see the details of each of these models in brief [Ref. http://codebetter.com/blogs/raymond.lewallen/archive/2005/07/13/129114.aspx ] 2.2) Introduction Methodologies 1) Waterfall Model: This model is called as the waterfall model, because in this model the more emphasizes is on the complete phase development before proceeding with the next phase of the development. With the combination with some kinds phase completions, establishment of the baseline is done which freezes the development products at such point. If the current requirement is identified in order to change these products, then the process of formal change is followed in order make the change. Such kind of phases graphic representation during the software development resembling the waterfall model downward flow. [Ref. http://www.onestoptesting.com/sdlc-models/waterfall-model ] 2) Prototyping Model: Waterfall model is basically designed for addressing the issues with the waterfall model. In this model, the basic idea is that rather than freezing the requirements before coding or designs we can proceed, using the throwaway prototype requirements of the development understands. On the basis of requirements which are currently known. The prototype development is inside contains the coding, designing as well as testing. But each of these phases is not done very formally or thoroughly. Thus using such kind of mechanism, end users can get the systems actual feel, only because of the thing that prototype interactions will allow clients to understand the requirements better way for the desired system. 3) Iterative Enhancement Model: This model is trying to combine the features of models like waterfall as well as prototyping models. The main idea behind such model is that development of the software is done on the basis of incremental approaches, in which each and every increment is adding the some kind of functional capability in the system still the system is fully implemented. During the every step, extensions, designing and modifications are made. [Ref. http://codebetter.com/blogs/raymond.lewallen/archive/2005/07/13/129114.aspx ] 4) Incremental Model Main idea in this model is that during the overlapping sections waterfall is performed in order to attempt projects of waterfall model compensate which is done by generating the earlier usable functionality. This kind of model may be needed the overall requirments set that are small projects series. With the general objectives, initially using the basic objective, incremental model is started. 5) Spiral Model The model for the incremental is can be considered as the spiral model sometimes. The view of the spiral model is illustrating the one of the strength of the previous model in this section which is: system size grows while the resources can be held on constant. The size of spiral is corresponds to the size of system, on the other hand the distance among the coils indicating the resources. As the name indicating such model has many cycles. The dimension of the radial representing cumulative cost which is incurred while accomplishing the steps that are done so far as well as dimension of angular representing the progress which is made during the completing the every spiral cycle. [Ref. http://codebetter.com/blogs/raymond.lewallen/archive/2005/07/13/129114.aspx ] 6) Object Oriented Methodology As the name indicating, such methodology requiring using the object oriented techniques which can be used during the requirement analysis, designing and implementation phase of the system. Such kind of methodology asking for the analyst for determining the systems objects, their behavior over the time or their behavior in response to the events, as well as what kind of relations and responsibilities an object has to with the other objects. [Ref. http://codebetter.com/blogs/raymond.lewallen/archive/2005/07/13/129114.aspx ] 2.3 Advantages and Disadvantages Advantages of Prototyping Model Early functionality. Providing the process in order to perfect the definition of requirments. Providing the risk control. Main focus of the documentation is on the end product rather than the evolution of product. Providing the basic specification which is embodied in the operating replica. Disadvantages of Prototyping Model This method is less applicable for the existing systems as compare to the existing new systems development. Suffering from the dirty documentaion. Bad reputation in between the conservatives because of dirty and quick method. Sometimes using this method system is developed with the poor performance. Advantages of Iterative Method Reliable software production. This may be intrdouced gradually to an organization. Disadvantages of Iterative Method Complete sets of requirements are required. Disciplined style may stifle creativity. Advantages of Object-Oriented: Problem owners can joining in producing the solution. Maintenance costs are less due to the object oriented analysis which encourages the complete set of solution. This kind of model expresses the reality of users view. Disadvantages of Object-Oriented This is difficult for those methods which is having the structured analysis of background. This method may be difficult with the DoD-STD- 2167A. [Ref. http://codebetter.com/blogs/raymond.lewallen/archive/2005/07/13/129114.aspx ] 2.4 Details: Two Methodologies In the following section, discussion and detailed working of the two models such as incremental model and waterfall model. 1) Waterfall Model: As we discussed the basic working this model in above section, in this section we will take the overview of basic steps of the model in the software development: Following figure shows the different phase in the development of the software. The documentation included the documentation from each phase. The phases below the detailed design phase include software as part of their output. Transition from phase to phase is accomplished by holding a formal review that is attended by the contractor and appropriate government agencies. These reviews provide the government insight into the contractors progress. At critical points on the waterfall model, baselines are established, the last of which is the product baseline. [Figure:1: Waterfall Model] As showing in above figure 1, as the name indicating waterfall model is made up of sequentially of phases one after the next phase. In comparison with the other software development models, following are some of the salient attributes of this model: This is the forma method. This is like top down development approach. This is consisting of phases which are independent and needs to be completed sequentially. This model is used in different ways: Phases are combined, The starting as well as ending points are different. [Ref. http://www.onestoptesting.com/sdlc-models/waterfall-model ] 2) Incremental Method: C:Documents and Settingsgodwit3Desktopincremental-model1.gif As we discussed in the last paragraph, the model of incremental is performing the waterfall in the overlapping sections in order to attempt length compensation for the waterfall model projects by generating the earlier useful functionality. As compared to the waterfall model, a project which uses the incremental model is starting with the general objectives. In this case, some part of such objectives are defined as the requirements as well as are implemented, after that the next part of these objective are considered and implemented, this process is continues until the complete objective is achieved. However as compare to the complete requirements general objectives can be uncomfortable for the management. Well defined interfaces are needed due to the fact that few modules may be completed early compare to others. This model is more flexible for the development of the websites as compare to the softwareà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢s. Thus we selected incremental model for the same. [Ref. http://testing-mines.blogspot.com/2006/05/what-is-incremental-model.html] 2.5) Methodology Selection For our proposed application we have to use the method of incremental approach which is best suitable for such kinds of applications. Because of the following benefits from it: Generates working software quickly and early during the software life cycle. More flexibleless costly to change scope and requirements. Easier to test and debug http://kona.kontera.com/javascript/lib/imgs/grey_loader.gif during a smaller iteration. Each iteration is an easily managed milestone.

Slowing Down the Speed of Light

Slowing Down the Speed of Light STOPPING LIGHT IN  ITS TRACKS Noorul Husna Binti Safian Sauri Abstract Introduction The fact that speed of light which is very fast can be slowed down and stopped when there is change in refractive index. Stopped light achieved when the optical pulses are trapped in some material such as in the experiment which have been done by G. Heinze et al.[1]. In that experiment, the optical pulses was stopped in cooled Pr3+:Y2SiO5 crystal up to 20 µs. Then slow light can be obtained by measured the decrease in group velocity. A.V Turukhin et al.[2] done the experiment to observed the ultraslow light. As a result from their experiment, a 45ms-1 speed of light were observed. The group velocity, is defined as vg(w) = c / n(w) and from the equation ng(w) = n(w) + w dn (w)/dw , it showed the slow light can be obtained from the variation of refractive index and the dispersion of the material. Furthermore, when , the group velocity can be highly reduced in material. So in order to achieve the slow light, material with higher dispersion is needed. However, in this situation a strong absorptions have become a big obstacle. It is because of the fact that higher dispersion gives a higher absorption and lead to a bad data transmission. Technique of Electromagnetically Induced Transparency (EIT) introduced by researchers give the best solution for the strong absorptions although the EIT does not give 100% transmission. At the same time, EIT give additional advantages in order to slowed down and stopped the fast speed optical pulses. A solid-state medium is more preferred in many applications of slow light because it has special properties. In solid- state medium, atomic diffusion is not being present, so it allow longer times for optical pulses storage. The slow light techniques play important role in numerous applications for example in optical- communication system. Theoretical background The condition of vg Where E is electric field and ω is angular frequency propagating through a medium. Then the phase of this wave is given by : The points of constant phase will move in a velocity of where k is a wavenumber. Then used the relation of the phase velocity become . n from the equation is refer to a refrective index and c is the velocity of light in a vacuum. When the field is not considered as monochromatic, that velocity is defined as a group velocity and this velocity shows the propagation rate of changes in amplitude. Mathematically, group velocity is given by : Group velocity also can be defined as velocity at which energy or information is transmitted along a wave. Noticed that group index is then From equation (6), the group index depends on dispersion and slow light can be obtained by making the large. Professor Jakob Khanin and Olga Kocharovskaya were the first physicists that introduced the theory of EIT. EIT is a phenomenon of quantum optics which permits an opaque medium to be transparent to the optical light wave while still keeping the strong dispersion needed to generate the slow light. Based on Figure 2, when a first light beam is applied to the opaque medium, the light beam is completely absorbed. Then, after a second light is applied to the opaque medium suddenly the medium become transparent. Figure 1: observation when the control beam is off and on The atoms experience a spontaneous process. When light beam comes in which it resonant with the frequency of the transitions, the atoms will excite to the higher energy level. This situation describes the normal absorption of light. Then, without any external radiation, the atom will decay spontaneously and end up in the lower state. These process depend on the number density of photon,. At first, I study the two level atomic system. From Einstein B coefficients, the transition probability up from ground state |1> to excited state |2> is B12 and from the Einstein A coefficient, the spontaneous transition down from excited state |2> to ground state of |1> is A21. When the light is shining in the system, the number N1 of atom at the state |1> must be equal with the population N2 of atoms in the state |2>. Then, the absorption in the system is said to be saturated which mean there is no absorption of light beam can be happen. This situation will not be able to make the phenomena of EIT from being happen. To make the two level system unbalance, another state is introduce by shining a second light. This is why three level atomic system is used in the EIT. Figure 2 : representation of absorption and spontaneous emission Figure 3 illustrates the three level atomic system interact by a control beam which is a strong optical field and a probe beam which is a weak optical field. The three level system is also called a à ¡Ã‚ ´Ã‚ §-system based on its shape. The atoms are consider to have a pair of lower energy states of |1> and |2>. The probe beam couples states |1> and |3> with frequency while the control beam couples states |2> and |3> with frequency . The two pathway interfere and cancel each other and then create a dark states polariton. Dark states means that there is no atoms will be promote to the excited state and then vanish the absorption of light. Figure 3 : representation of three level atomic system The expression of linear susceptibility spectrum explained the how the atomic ensemble respond to the strong resonant control beam and weak probe beam[4]. The expression is : Where be similar to the relaxation rate of the coherence, N is the total number of atoms in the sample, is the difference between the probe beam frequency and the frequency of the atomic transition (with = 0 show the frequency of the atom-field resonance), is the atom-field coupling constant, and lastly is the Rabi frequency of the control beam[]. Rabi frequency is defined as , where and E are correspond to the transition moment and electric field of the control beam[].From the susceptibility, the imaginary part, where is the transmission coefficient describes absorptive properties of the medium and L is the length of the medium. Then the real part of the susceptibility, showed the refractive index. Based on figure 4, the various ‘wiggles’ refractive index which is green line showed the behaviour of nonlinear when detuning the frequency. The strength of the dispersion which relate to the slow light is determined by the gradient of the refractive index and at the same time the sharp EIT exhibit the strong nonlinear dispersive behaviour. The sharp peak of the transmission line showed the ideal EIT take place at exact resonance ( ). ). The exact resonance condition achieved when the frequency difference between the two light beams accurately matches with the frequency separation between the two lower states of and .When the exact resonance condition is not achieved, the interference is not ideal the medium become absorbing[5]. Figure 5 represents the propagation of light in the EIT medium. At the beginning, the light pulse is outside the medium and all the atoms are in the ground states( |1>). The front edge of the light pulse then enters the medium and is quickly decelerated. The back edge of the light pulse propagates with vacuum speed c because it is still outside of the medium. Hence, upon entrance into the cell, the spatial extent of the light pulse is compressed by the ratio of , while its peak amplitude remains same. The energy of the light pulse is obviously much smaller when it is inside the medium. The photons are being expended to create the coherence between states of |1> and |2> , or in other words, to flip the atomic spins, with the excess energy carried away by the control field. Then, the wave of flipped spins now propagates together with the light pulse. The atoms are therefore strongly coupled to the photons which is in the light pulse, with an associated quasiparticle called a dark-state polarition[6]. The quasiparticle is a combination of photons and spins excitation. The spatial extent increases again when the light pulse exits the medium and then the atoms return back to their original ground state. However, a delayed of the whole light pulse occurred by where L is the length of the medium. In the dark-state polarition, when the control field is adiabatically switched off, the coupled excitation is converted into a pure atomic excitation, that is, the probe field is stopped[7]. Then, to retrieve the probe field, the control field is switched on. A storage time of more than a second were achieved in this way. Figure 4 : Spectrum of transmission and refractive index corresponding to EIT. This figure is taken from reference [4]. . Figure 4 : spatial compression occurred when the light beam enters the medium and at the same time the photons are changed into a atomic (spin excitation). This figure is taken from reference [5]. In the situation when the decay rate between state and is negligible, the propagation of probe field can be describe by the electric field operator, where the sum is over the free-space of photonic modes with wave vectors k and bosonic operator [8]. A collective atomic operators, averaged over small is used to describe the properties of the medium but at position z, macroscopic volumes containing particles [6]. Specifically, the operator is used to describes the polarization of atom oscillating at an optical frequency, whereas the operator decribes a low-frequency spin wave. Assumed that the control field is strong and it is treated classically. The atomic evolution is conducted by a set of Heisenberg equation which is , where is represent the atom-field interaction Hamiltonian and [8]. From these equations, the probe field is assuming to be weak and that and change in time slowly. To leading order in the probe field , find that The Heisenberg equation, described the evolution of the probe field. A new quantum field which is a superposition of photonics and spin-wave components is introduced in order to attained the solution for the equations (15),(16) and (17). Furthermore, the new quantum field, must obeys the equation of motion, The equation (21) describes a shape-preserving propagation with velocity which is proportional to the magnitude of its photonic component. Moreover, EIT is also related to the Stark effect and Zeeman effects[9]. Stark effects is the splitting of energy level due to the present of electric field while Zeeman effects is the splitting of energy level due to the present of magnetic field. If a volume is considered to be filled by a hydrogen atom and a DC field is applied to the volume, the state will splits into three states with specific energies. By follow the notation ,the states degenerates while the states is generates which the state mixes with the states. The states are : Disscussion In this section, I will disscuss about the implementation of EIT to observe the slow light and stopping.One of the technique used to induce transparency in opaque medium is â€Å"Coherent population trapping† or CPT. In CPT, the atoms are forced into a coherent superposition of Zeeman or hyperfine states that are strongly coupled to the light via Raman transition[10]. The definition of superposition state is the state which is stable against absorption from the radiation of electromagnetic field[]. Generally, CPT is more refer to the concept of two fields closely equal to the Rabi frequency. The experiment done by Alexander et al. [11] used the concept of CPT to observe the slow light in a hot rubidium atoms. The main idea in the experiment is to obtain the narrow EIT resonance. Currently, the quantum mechanics is used for a fundamental of communication and computation. To carry out these ideas, information should be encoded in delicate quantum states, like a single-photon states, and then manipulated without being destroyed. It is fact that photons are the fastest and be a simplest carriers of quantum information. However, they are not easy to localize and process. EIT has already had a large impact on the field of optical science. One of the potential application is used in optical buffering for the optical communication. From figure , there is an switch in optical router. The switch can only deal with one data packet at a time [10]. So if two data packet arrive at the same time, the collision of data packet will occur and the overall flow of the data packet will be slow down. Furthermore, the information carried by the two data packet will be loss. To avoid these problems, a slow light medium is activated in one of the branches in order to delay the velocity of data packet. As a result, the flow of information will be speed up because no collision between two data packet happened. References [1] G. Heinze, a. Rudolf, F. Beil, and T. Halfmann, â€Å"Storage of images in atomic coherences in a rare-earth-ion-doped solid,† Phys. Rev. A, vol. 81, no. 1, p. 011401, Jan. 2010. [2] a. Turukhin, V. Sudarshanam, M. Shahriar, J. Musser, B. Ham, and P. Hemmer, â€Å"Observation of Ultraslow and Stored Light Pulses in a Solid,† Phys. Rev. Lett., vol. 88, no. 2, p. 023602, Dec. 2001. [3] L. Hau, S. Harris, Z. Dutton, and C. Behroozi, â€Å"Light speed reduction to 17 metres per second in an ultracold atomic gas,† Nature, vol. 397, no. February, pp. 594–598, 1999. [4] M. D. Lukin, â€Å"Colloquiumà ¢Ã¢â€š ¬Ã‚ ¯: Trapping and manipulating photon states,† vol. 75, no. April, 2003. [5] M. Lukin and A. ImamoÄÅ ¸lu, â€Å"Controlling photons using electromagnetically induced transparency,† Nature, pp. 273–276, 2001. [6] M. Fleischhauer and M. Lukin, â€Å"Dark-State Polaritons in Electromagnetically Induced Transparency,† Phys. Rev. Lett., vol. 84, no. 22, pp. 5094–5097, May 2000. [7] T. Chanelià ¨re, D. N. Matsukevich, S. D. Jenkins, S.-Y. Lan, T. a B. Kennedy, and a Kuzmich, â€Å"Storage and retrieval of single photons transmitted between remote quantum memories.,† Nature, vol. 438, no. 7069, pp. 833–6, Dec. 2005. [8] a Andrà ©, M. D. Eisaman, R. L. Walsworth, a S. Zibrov, and M. D. Lukin, â€Å"Quantum control of light using electromagnetically induced transparency,† J. Phys. B At. Mol. Opt. Phys., vol. 38, no. 9, pp. S589–S604, May 2005. [9] S. Virally, â€Å"A Review of Slow Light Physics and Its Applications,† Ec. Polytech. Montr eal, pp. 82–90, 2008. [10] D. Phillips, a. Fleischhauer, a. Mair, R. Walsworth, and M. Lukin, â€Å"Storage of Light in Atomic Vapor,† Phys. Rev. Lett., vol. 86, no. 5, pp. 783–786, Jan. 2001. [11] M. Kash, V. Sautenkov, A. Zibrov, L. Hollberg, G. Welch, M. Lukin, Y. Rostovtsev, E. Fry, and M. Scully, â€Å"Ultraslow Group Velocity and Enhanced Nonlinear Optical Effects in a Coherently Driven Hot Atomic Gas,† Phys. Rev. Lett., vol. 82, no. 26, pp. 5229–5232, Jun. 1999. [12] A. L. G. Robert W. Boyd, Daniel J. Gauthier, â€Å"Applications of Slow Light in Telecommunications,† Opt. Photonics News, vol. 17, no. April, p. 18, 2006.

Summary of Ethan Brand by Nathaniel Hawthorne Essay example -- Ethan B

Summary of Ethan Brand by Nathaniel Hawthorne In the short story Ethan Brand, Ethan Brand lusts for knowledge that leads him on a quest for the unpardonable sin. The unpardonable sin, as one may interpret, is pride and self-gain. It is a loss of the brotherhood with man, and a loss of respect for God. Once this knowledge is gained, he faces alienation from all those around him. In searching for this sinful knowledge, Ethan Brand leads himself into intellectual isolation. He cannot separate his head from his heart, his intellect from his soul. After tending the kiln, in solitude for so long, his thoughts became his only company, as did the flames that danced in his eyes. Over come with the urge to seek knowledge, he falls to temptation. Adam and Eve's downfall was in knowledge, as was Ethan Brand's fall. His sin is best described as, "The sin of intellect that triumphed over the sense of brotherhood with man and reverence for God and sacrificed everything to its own mighty claims". Upon leaving for his twenty-year journey, Brand becomes deranged in the eyes ...

Integrating Women into the World Economy Essay -- Economics Females E

Integrating Women into the World Economy Introduction On November 9, 1989, the world’s economy changed dramatically. The fall of the Berlin wall produced a new world order which enabled states to connect on political, economic, and social levels with nations that were previously inaccessible to the western world. This created an interaction across national boundaries. The past two decades have seen the growing economic interdependence of countries worldwide, including an increased volume of cross-border transactions of goods and services, international capital flows, and most importantly, the rapid and widespread diffusion of technology (â€Å"Economic and Social Survey of Asia and the Pacific, 1999†). The airplane hijackings in America on September 11, 2001 further proved that the world had changed. From that day forward, all nations possessed the abilities to play a role in outsourcing and technology sharing. New York Times columnist Thomas Friedman illustrated this point in the book â€Å"The World Is Flat† when he stated that economic power sources are no longer monopolized by prosperous developed nations, but instead by a flattened, equal playing field for all countries. There are numerous illustrations used by Friedman, including the fact that â€Å"all the world’s computer parts come from the same supply chain that runs from Korea, down through coastal China, over to Taiwan and down to Malaysia† (Friedman). With the influx of development in the global arena, opportunities for jobs and sustainability have also increased, especially in developing nations with resources to contribute to global production. Such positions and opportunities have been filled mainly by citizens who have been granted educational opportuniti... ...nomics. United Nations Development Fund for Women. 23 April 2007 â€Å"Regional Symposium on Gender Mainstreaming into Economic Policies.† 28-30 January 2004. United Nations Economic Commission for Europe. â€Å"The United Nations Fourth World Conference on Women.† September 2005. Beijing Platform for Action. 20 April 2007. â€Å"What Are the Millennium Development Goals?† 2005. UN Development Goals. 20 April 2007. â€Å"Women and the Economy.† UNFPA: Working to Empower Women. 23 April 2007. - Women and the Economy.htm>

Curious Images Essay

Images are significant parts of our lives as they confine and define all that is familiar to us. Human mind has a tendency to associate feelings with images. Each feeling has a face; our fears, contemplations, pleasure, hope, failure etc. , all have a face. So vivid are these faces that as soon as an emotion or thought sprouts in the mind, an image flashes to gratify our senses; so strong is the grip of these images that we keep relating and projecting our thoughts, feelings and memories with them. We see an example of this in R. L. Stevenson’s â€Å"The Strange Case of Dr. Jekyll and Mr.  Hyde†, where the personality of Mr. Hyde becomes active as soon as his Dr. Jekyll’s thoughts change. For this reason, something that is unknown always causes a feeling of discomfort as it has no visual representation. Our entire lives revolve around familiar and unfamiliar images. The conscious part of our mind always relies on these images to identify our world. Thus, images influence us strongly, sometimes manipulating us, while at other times, playing tricks upon us, like ceiling fan and motion pictures, as demonstrated by Oliver Sack in â€Å"In the Rivers of Consciousness†. Our perceptions sometimes makes us prisoner of our thoughts, binding us into bouts of endless torment. Society often slots our actions into bold categories of good and bad, which forces people to lead dual lives, becoming unwittingly, victim of these images. Dr. Jekyll from the â€Å"The Strange Case of Dr. Jekyll and Mr. Hyde† is one such person who is suffering from this inner conflict of maintaining a good image in the society (R. L. Stevenson). Due to this obsession he undertakes the task of transforming his personality chemically. â€Å"A change had come over me. It was no longer the fear of gallows, it was the horror of being Hyde that racked me. † (430). In an attempt to get rid of the evil side of his personality, Dr. Jekyll drinks a potion he creates, which brings out the personality of Mr. Hyde. However to his horror, he discovers that Mr. Hyde becomes more and more monstrous as days go by. This really bothers him because ironically Mr. Hyde had turned out to be totally opposite to what he had imagined. It becomes very difficult for him to keep this side of his personality hidden any longer and this fear of being discovered ultimately with a negative image causes him to kill himself. Tormented by his thoughts of wanting a good image for himself, Dr. Jekyll carried out a dangerous experiment which turned out to be a disaster. Here we see how images created in the mind can manipulate a person to create a harmony between the bigger image created by the society, making him a prisoner of his thoughts. In case of Dr. Jekyll, we also observe that thoughts, for example, of good and evil which translates into an image of moral stance, become more powerful when suppressed. â€Å"By then, Freud emphasized, the wish maybe disguised to the point of being unrecognizable. Things might even appear their opposites: pleasure as pain, desire as fear. † (Gelman, Dreams on the Couch). Here we take a look at Freud’s explanation of seemingly weird dreams. He goes on to explain that something which is like a social taboo, gets suppressed in the mind to an extent where it seems to be exact opposite. Such an image, due to getting suppressed becomes more powerful. â€Å"Thus there are two forces operating: the wish, and a defense against it, a censor. † (133). The wish or desire being a social taboo, causes the dreamer to dream exact opposite of what he desires. But this is not always the case, as argued by many other analysts. â€Å"There is no need to assume dreams have a latent content†, says Harry Fiss†¦Ã¢â‚¬  (134). The images or memories which have been very significant to the dreamer must be taken into consideration as they remain in subconscious and influence our thought process. Thus, we see how the image created by the society influences the images created in the minds of people. Human mind works in a complex way to decipher the images which it keeps viewing, creating and transforming. Sometimes the captured image puts the mind into a trancelike state and at other times tricking the mind to cause an illusion. â€Å"Freed from inhibitions of verbal communication, it seems, we respond to visual imagery that may have been our earliest mode of thinking- one reason, perhaps, why the language of poetry can stir us as it does. That may explain, too, why some dreams can haunt us with a power more persuasive even than that of poetry, shimmering in the mind like lost cities or leaving us, for hours afterward, with an unaccountable feeling of terror. † (Gelman, Dreams on the Couch). A moment which might have been very significant in a person’s life lays hidden in the subconscious layers of the mind. Constant storage of images in our minds, sometimes cause them to jumble up. That’s why our dreams are made of up of images that sometimes make sense and very often do not, explaining why we sometimes have pleasant dreams and at other times suffer from nightmares. â€Å"When the analyst asked the patient if he associated anything with the â€Å"Malarial Area†, he decided, after some thought, that the phrase could be an anagram. † (137). Here we see how the patient’s long forgotten childhood memories distorted his dreams. â€Å"In this patient, whom they call Mrs. M. , there were â€Å"freeze frames† lasting several seconds, during which Mrs. M. would see a prolonged, motionless image and be visually unaware of any movement around her, though her flow of thought and perception was otherwise normal. † (Sacks, In the Rivers of Consciousness). Here we see Mrs. M. getting caught in a frozen moment. The similarity between these situations is how images manipulate these two patients to be caught in the moment. The interesting difference here is how perception creates an image, which one remembers in his dream with his eyes closed, and the other doesn’t with her eyes open. Images sometimes play a trick of optical illusion, causing the brain to believe and perceive motions differently. When we see a series of still images in quick succession, there is an illusion which leads us to believe that we are in fact looking at one continuous motion picture. This optical illusion tricks the mind into believing that which is not the case. â€Å"Another striking example of perceptual standstill could be demonstrated with a common visual illusion, that of the Necker cube. Normally, when we look at this ambiguous perspective drawing of a cube, it switches perspective every few seconds, first seeming to project, then to recede, and no effort of will suffices to prevent this switching back and forth. † (Sacks, In the Rivers of Consciousness). This perspective switching portrays an image which keeps changing and is not still. This is in huge contrast with the case of Mrs. M. , who experiences a standstill trance like state, where she perceives the image in front of her to be motionless. Her perspective doesn’t change for elongated periods of time, until perhaps someone interrupts her. Similarly, ceiling fan sometimes seems to be going in the forward direction, while at other times in the opposite direction. Further, as Sacks goes on to explain how people who suffer from migraine perceive what they see. The migraine patients in their delirium see flickering images, which accelerate to restore normal motion. In all these case, we see how moving images are perceived by the brain, sometimes rushing and causing fluid like motion. At other times, freezing and causing a trance like state. This concept has today advanced into the making of motion pictures, advanced imaging devices etc. From prehistoric times, man has given immense importance to images. This is confirmed by the ancient cave paintings. We see that drawing or creating images fulfills a deeper aspect of human personality, as it offers a very strong medium of self expression. Sometimes images form a pattern in the mind, locking us in that moment, as we see in the case of Mrs. M. â€Å"In the River of Consciousness† by Oliver Sacks. Sometimes they offer a familiar territory to which we are used to, while at other times, they act as agents in visual communication. Images take on a variety of forms and functions. They create patterns in our minds which make us happy, sad and fearful, as we keep relying upon them subconsciously. Often, we don’t realize how much our lives are influenced by them. The way we dress, work, live, are all influenced by the perceived images which we have created in our minds ever since we were born. This is a never ending process which continues as long as we live. Images rule our conscious and sub conscious, also influencing our dreams, as we observe in â€Å"Dreams on the Couch† by David Gelman. Living in a society, where images and appearances are very important, we often perform actions which do not always leave us happy. R. L. Stevenson’s â€Å"The Strange Case of Dr. Jekyll and Mr. Hyde† is a classic example of this. In such situations, our suppressed desires sometimes try to overcome our sensibility, till there comes a point where we are forced to look at the bigger picture. Are we truly what we portray ourselves to be or we pretend to be someone who we want to be? Whatever be the case, one cannot deny the impact that images have on our lives, positive or negative. Man, being a social animal adapts himself to put on various images sometimes for himself, sometimes for the society he lives in; sometimes knowingly, sometimes unknowingly. Works Cited Stevenson, R. L. The Strange Case of Dr. Jekyll and Mr. Hyde. 1886. (Gelman, Dreams on the Couch) (Sacks, In the Rivers of Consciousness)

Case: Settlement

Discussion1 Is Fast Eddie required to accrue a liability as of March 31, 2011, financial statements related to the ongoing government investigation? If so, how much? Yes. Fast Eddie is required to accrue a liability of $3. 7 million. Subsequent Events are Events or transactions that occur after the balance sheet date but before financial statements are issued or are available to be issued. There are two types of subsequent events: a.The first type consists of events or transactions that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements (that is, recognized subsequent events). b. The second type consists of events that provide evidence about conditions that did not exist at the date of the balance sheet but arose subsequent to that date (that is, nonrecognized subsequent events).According to ASC 855-10-25-1, an entity shall recognize in the financial statements t he effects of all subsequent events that provide additional evidence about conditions that existed at the date of the balance sheet, including the estimates inherent in the process of preparing financial statements.An example of recognized subsequent events is that if the events that gave rise to litigation had taken place before the balance sheet date and that litigation is settled after the balance sheet date but before the financial statements are issued or are available to be issued, for an amount different from the liability recorded in the accounts, then the settlement amount should be considered in estimating the amount of liability recognized in the financial statements at the balance sheet date. The investigation was held in 2010 before the end of fiscal year on Mar 31, 2011.The $3. 7 million of settlement was offered in April 2011, before CPAs-R-Us completed its procedures and issued the audit report for the year ended March 31, 2011. The government did not accept offers t o settle before finalizing its investigation, as a result, Fast Eddie should accrue a liability as of Mar 31, 2011. According to ASC 450-20-25-2, the required accrual liability would be $3. 7 million. An estimated loss from a loss contingency shall be accrued by a charge to income if both of the following conditions are met: a.Information available before the financial statements are issued or are available to be issued (as discussed in Section 855-10-25) indicates that it is probable that an asset had been impaired or a liability had been incurred at the date of the financial statements. Date of the financial statements means the end of the most recent accounting period for which financial statements are being presented. It is implicit in this condition that it must be probable that one or more future events will occur confirming the fact of the loss. b. The amount of loss can be reasonably estimated. 50-20-50-10 talks about Litigation, Claims, and Assessments. As a result, the set tlement is a recognized subsequent event. According to EITF Topic No. D-77, â€Å"Accounting for Legal Costs Expected to Be Incurred in Connection With a Loss Contingency† (ASC 450-20-S99), The SEC Observer noted that the SEC staff would expect a registrant's accounting policy to be applied consistently and that APB Opinion No. 22, Disclosure of Accounting Policies, requires disclosure of material accounting policies and the methods of applying those policies. Discussion2If Fast Eddie withdraws the settlement offer before it is accepted by the government and before the issuance of Fast Eddie’s financial statements, would that change your answer to the above question? According to 450-20-55-36, Fast Eddie should provide an illustrative disclosure in accordance with ASC 450-20-50. In this case, accrual would be inappropriate, but disclosure would be required if an unfavorable outcome is determined to be reasonably possible but not probable (450-20-55-13). Since Fat Eddie believes the company is not obligated.

Coffee and Starbucks Essay

Attention Getter: You probably wouldn’t believe me if I told you that a drug that creates the same signaling activity in the brain as cocaine is sold legally on almost every street corner across the nation. This is a fact however, and the drug is caffeine. It is one of the main ingredients in coffee, and is currently the most frequently used recreational drug in the world. Establish Credibility: I personally consider myself a coffee expert, and have been drinking at least one cup of coffee almost every morning for the last three years. Relate to the audience: Now, I know not every one of you drinks coffee but as you can tell by the multiple Dutch Bros, Starbucks, and other coffee shops around town it is a very big part of our culture today. Preview: Throughout the course of this speech, I will discuss three major points relating to coffee. First, I will give some information on the history of coffee and when it first came into human culture, followed by the positive health benefits and some of the negative health risks associated with coffee. [First of all, I’m going to talk a little bit about the historical side of coffee and how it first got popular in our culture. ] Body I. Main Point: To understand why coffee is such a big part of modern day society, we must first understand where it originated. A. Sub-point: Coffee was first cultivated on the Arabian Peninsula in the 15th century. 1. Supporting details: Not only were the Arab’s the first to cultivate coffee, but they also were the first to trade coffee. 2. By the 16th century, the popularity of coffee was already expanding and Persia, Egypt, Syria and Turkey all had discovered about the amazing beverage. B. Sub-point: By the 17th century coffee was still gaining notoriety around the world, however it was still not a household favorite as it as today. 1. Supporting Details: Coffee houses started sprouting up everywhere in the 1700’s, however tea was still the most popular drink around. 2. In 1773 a heavy tax on tea was inflicted by King George, which led to a pretty famous revolt called The Boston Tea Party. 3. Since people couldn’t afford tea after the tax, coffee quickly took over as the most popular morning beverage across the world, and remains the most popular today. [Although coffee has been drank for hundreds of years, the majority of its health benefits have only recently been discovered in the last few decades. ] II. Main Point: The majority of people drink coffee just to get through each day, however it does have many positive benefits to your health. A. Sub-point: Within just the last few years alone there has been research done showing that coffee may protect against type 2 diabetes, liver cancer, and Alzheimer’s disease. 1. Supporting details: According the Centers for Disease Control and Prevention, liver cancer is the ninth leading cause of cancer and coffee has been shown to reduce risk of liver cancer by 40%. 2. Drinking coffee reduces the risk of diabetes as well, which is a common risk factor of liver cancer. B. Sub-point: One of the other medical uses of coffee is in preventing Alzheimer’s disease and dementia. 1. Supporting details: The most common neurodegenerative disease and number 1 cause of dementia is Alzheimer’s. 2. There is no cure for Alzheimer’s, however it has been shown that coffee drinkers have up to a 65% lower risk of getting the disease. [You might be thinking coffee is a miracle drink after some of those statistics, however it also has many negative effects on health as well. ] III. Main Point: There are a great deal of health issues that can result from drinking coffee, with some of the most common being addiction, insomnia and increased blood pressure. A. Sub-point: As a college student, one of the last things you will ever want to experience is insomnia, but it is a regular side effect of coffee. 1. Supporting details: By blocking certain receptors in the brain, coffee prevents chemicals that induce sleep from being used. B. Sub-point: Another widely studied effect of coffee, specifically caffeine, is how addictive it is. 1. Supporting details: Caffeine stimulates the central nervous system and regular use will result in a physical dependence. 2. If a regular coffee drinker doesn’t have their daily cup, they will feel fatigued, irritable, and experience headaches within the first 24 hours. Conclusion 1. Transition Signal: In conclusion, coffee isn’t for everyone but if you do choose to consume it, you at least now know how it affects you. 2. Summary of Main Points: Throughout this speech we looked at how coffee first gained popularity in the human race, some of it’s positive health benefits as well as some of the negatives. 3. Call to Action: Even if you’ve never been a fan of coffee, try drinking a cup before your next study session and see if you still don’t like it. 4. Memorable end: Although it may be addicting and cause serious potential health problems, there must be something special about coffee considering over half of adults in the U. S. drink it daily. References: 1) â€Å"Coffee Acts Just like Cocaine, Says Scientist. † BeverageDaily. com. Beverage Daily, 02 Sept. 2002. Web. 12 Nov. 2014. 2) Goldschein, Eric. â€Å"11 Incredible Facts About The Global Coffee Industry. † Business Insider. Business Insider, Inc, 14 Nov. 2011. Web. 12 Nov. 2014. 3) Gunnars, Kris. â€Å"13 Proven Health Benefits of Coffee† Authority Nutrition. N. p. , n. d. Web. 12 Nov. 2014. 4) â€Å"The History Of Coffee. † – National Coffee Association. NCA, n. d. Web. 12 Nov. 2014. 5) Stromberg, Joseph. â€Å"This Is How Your Brain Becomes Addicted to Caffeine. † Smithsonian. N. p. , 9 Aug. 2013. Web. 11 Nov. 2014. 6) Van Dam, Rob. â€Å"Ask the Expert: Coffee and Health. † The Nutrition Source. Harvard School of Public Health, n. d. Web. 09 Nov. 2014. 7) Weber, Belinda. â€Å"Coffee Consumption Cuts Liver Cancer Risk. † Medical News Today. MediLexicon International, 22 Oct. 2013. Web. 12 Nov. 2014. .