St Augustine and The Stoics Philosophy comparison and analysis Research Paper

St Augustine and The Stoics Philosophy comparison and analysis - Research Paper Example Augustine’s philosophy and its influence on our todays lives. However, philosophy has a number of unresolved questions, termed as philosophical problems. Among the problematics, moral knowledge, philosophy of language, questions on philosophy of mathematics, philosophy of mind, questions on philosophy of science and finally Metaphysics. Additionally, the question problem include, does mathematics and science applied by the philosophers apply in today’s world? Did the philosophers deal with the mind problems? The paper also gives the comparisons on the two philosophies and broadly analyses the philosophies. Eventually, a summary of the impacts of the philosophies on today’s world is clearly highlighted. Philosophy is a topic that can never be underestimated. Augustine is a fourth-century philosopher whose ground-breaking philosophy infiltrated Christian doctrines with Neo-Platonism to a wider extent. Broadly, Neoplatonism refers to a school of philosophy based on teachings of Plato and subsequently and subsequently Plotinus. It was the foundation of paganism. Augustine being the founder of western Christianity got lot of recognition not only in Rome but also across the vast Europe1. Moreover, the philosopher got the fame from being an inimitable Catholic theologian and his adverse contributions to Western philosophy. The philosopher was the first ecclesiastical author the whole course of whose development can be clearly traced, as well as the first of whose case researcher can determine the exact period covered by his career till today. Augustine argued sceptics have no basis for claiming to know that there is no knowledge. Evidently in one of Augustine’s letter, he states, â€Å"even if I am mistaken, I am.† Additionally, Augustine was the first philosopher to promote what has come to be called, â€Å"the argument by analogy† against solipsism. To a wider extent, solipsism refers to the theory that the self is all that exists or that can be proven

Exampaper Essay Example | Topics and Well Written Essays - 1500 words

Exampaper - Essay Example Irigaray, Nozick and Delaney have attempted to articulate this idea in more modern terms. However, William Shakespeare’s Sonnet 116 presents this concept quite eloquently. The idea that love can have a somewhat illusory nature was put forward by Rorty when she used Spinoza’s to help illustrate her concept. She argued that indulging in fantasy and unrealistic expectations of love are potentially dangerous because they distort our perception of love. Instead of an authentic experience, idolatrous love offers an illusion. Over the centuries humanity has developed certain romanticized ideas of idealized male and female roles in relation to romantic love. Simone de Beauvoir and Marilyn Friedman, in particular, discuss the dangers of such romantic ideology and their relation to male chauvinism. We live in an increasingly â€Å"cyberized† world. The Internet and social media have allowed â€Å"cyber-relationships† to become increasingly more frequent. However, Zygmunt Bauman and Hubert Dreyfus underscore the need for traditional, face-to-face interactions in building more lasting and exclusive relationships. They warn that online relationships run a very high risk of more ephemeral and promiscuous interactions, precluding lasting and substantial relationships from developing. Montaigne presents the idea that a perfect friendship emphasizes as an essential aspect of the friendship. He goes further to describe such a friendship as one characterized by such unconditional openness and trust that each individual’s need is met by the other. However, Montaigne is careful to distinguish such an ideal from homosexual love. Possible modern interpretations of this â€Å"perfect friendship† could be the ideas of â€Å"bromance† and â€Å"womance† that have become more prevalent nowadays. Touch is one of the most concrete ways in which we express love and affection for one another. Although sexual intimacy is

MIDDLE RANGE NURSING THEORY Research Paper Example | Topics and Well Written Essays - 1250 words

MIDDLE RANGE NURSING THEORY - Research Paper Example In the same way, it is necessary for nurses to understand the different concepts of nursing strategies and various psychological and philosophical aspects of quality nursing care. Theoretical frameworks including middle range theories clearly define the nursing standards for the modern world. This paper will provide an overview of the concept and evolution of Middle Range Theories of Nursing and their applicability in today’s healthcare scenario. Concepts: Origin and Development Middle range theories are precise and moderate, and possess limited number of variables; hence, they effectively define nursing care standards. To be specific, middle range theories can be effectively applied in the field of nursing research and practice as their practicality can be directly tested. To define, â€Å"mid-range theories stand midway between the all encompassing global grand theories that address the entire discipline and hypotheses and theories that are very specific to a particular phe nomenon or population† (Lenz, 2006, n.p). As compared to grand theories, Middle range theories are more concrete and narrow. To illustrate, they are written relatively at specific level with limited number of propositions and ideas. Theory of Human Caring (Watson), Theory of Interpersonal Relations (Peplau), and Theory of the Deliberative Nursing Process (Orlando) are some of the well known middle range nursing theories. With regard to the progress of middle range theories, they are based on the results derived from practice and research that can provide clear direction for casual practice and intellectual practice in the discipline further. The past century witnessed a notable level of progress in the middle range theories. Except a few, most of the middle-range theories have come directly from clinicians’ experience. The middle-range theory helps to mark certain condition of the related signs and future approach for symptom management in caring patients. The theory al so emphasis on the result of various expressions or conditions with regard to the patient’s performance, and encourages the clear evaluation of patient’s working outcomes. Lieher and Smith (1999), has listed â€Å"the relationship between the intellectual process and the source of content related to the development of middle-range theories†; they include â€Å"Inductive theory-building theory through practice, Deductive theory. Building from grand nursing theories, Combining existing nursing and non-nursing theories, and Developing theories from clinical practice guidelines â€Å" (Source: Approaches for generating middle range theory. Para. 1. As cited Peterson & Bredow, 2009, in p. 31). Middle range theories are of mainly three types; Middle-range descriptive theories, Middle-range predictive theories, and Middle-range explanatory theories. These variations could be analyzed on the basis of their characteristics and with most relevant examples. Among these, Middle-range descriptive theories usually encompass only a single main concept to classify a phenomenon. While doing so, it simply lists the generalities observed in individuals and groups, and these theories are normally tested by means of descriptive research. The interpersonal Relations (Peplau, 1952) is an example of a middle-range descriptive theory. Peplau’s theory focused on the therapeutic relationship between the nurse and the patient, which is termed as the Nurse-Client Relationship. In contrast, Middle-range expl

Application to the B.S. N program in New Jersey University ( Nursing Essay

Application to the B.S. N program in New Jersey University ( Nursing Program) - Essay Example HIPAA, the European Privacy Directive, and other like legislation do not concern themselves with the success or failure of a company. If a company's data is simply destroyed, then the legislation does not apply. In some cases of BCP, this type of legislation may apply, as in the case of data being maliciously copied for illegal use, and then the original source being destroyed. In this line of reasoning, the legislation that already exists is sufficient. BCP has to do with the preparation of functional copies of data that the business can use to continue to function. This will help save the business money in the case of an interruption. The success of businesses should not be legislated. It should not be against the law for a business to fail. --Doug I guess I am thinking of the stock market, banks, telecommunications, and other private companies. If they don't have a BCP and their services become unavailable, there are potentially serious consequences for the Nation. Doesn't the US government have a responsbility to ensure that critical areas have a BCP so that the country can function in case of an emergency Not tell them HOW to do it, but that they must do it and have some requirements to ensure it is being done. You are right. For example, the SCADA systems that govern the distribution/transmission of electricity and gas, must absolutely remain operational.

Spirituality and the Creative Spirit, (Portfolio#1) Essay

Spirituality and the Creative Spirit, (Portfolio#1) - Essay Example As it is also observed that in the text it is stated, â€Å"His (Davis) mother took him regularly to catholic church hoping that somehow provide comfort instead it filled him with fear, ‘I found the whole thing terrifying’† (17). Davis’s terror is explicable as the fear of punishment and the manner in which the church portrays God. However it is apparent that he is a spiritualist the reason being that he has strived to find meaning of life and was ultimately able to discover solace in nature and his catharsis was writing poetry. It is highly stressed upon that church and the Christian theology or any other religion does not governs spirituality reason being that spirituality is not simply confined to the search of God. Although for some people spiritualism is the exploration of one’s relation with God and importance of religion. Yet it is not true for the majority of the people because in the twenty first century a large number of people do not belie ve in God anymore as it is stated about Davis, â€Å"on many occasions he still believes that the Gods have fled† (17) it is more about self contemplation than about God. Nevertheless the importance of religion cannot be denied because in a large number of cases it acts as a catalyst for initiating or introducing an individual to spirituality. Since the Church plays an integral role in the exhibition of a large number of paintings regarding mysticism and also because religion has the power of instigating or putting an individual in a contemplative mood. So it is the process of questioning that leads a man to explore the mysteries of life and reason with the logic and principles of his existence. Spirituality can also be elucidated as a form of expression in which an individual gets a chance to express one’s every feeling of anger, love, hatred and admiration. Hence any form of art i.e. music, poetry, painting and dancing are all modes of expressing one’s interpretation of life as well one’s

With diagrams compare Essay Example for Free

With diagrams compare Essay This type of communication is between the sender and the receiver is known as connectionless (rather than dedicated) Contrasted with packet-switched is circuit-switched, a type of network such as the regular voice telephone network in which the communication circuit (path) for the call is set up and dedicated to the participants in that call. For the duration of the connection, all the resources on that circuit are unavailable for other users. Voice calls using the Internets packet-switched system are possible. Each end of the conversation is broken down into packets that are reassembled at the other end. The principles of packet switching are as follow. Messages are divided into data packets, which are then directed through the network to their destination under computer control. Besides a message portion, each packet contains data concerning. The principles of packet switching are as follow. Messages are divided into data packets, which are then directed through the network to their destination under computer control. Besides a message portion, each packet contains data concerning: Â  The destination of the address; Â  The source identification; The sequence of the packet in the complete message; Â  The detection and control of transmission errors. Â  Pre-determined routing. With this method, the routing details are included in the packet itself, each switching exchange forwarding the packet according to the embedded instructions; Â  Directory routing. Each switching exchange has a copy of a routing table to which it refers before forwarding each packet. The appropriate output queue is determined from the table and the packet destination Diagram shown below: Identify three types of cabling used in data communication. State which one you would recommend in an implement requiring high security consideration and why? The three types of cables used in data communication are: Optical Fiber Coaxial Coaxial cable is a copper that is used by TV companies between the community antenna, and also the user homes and businesses. At times these cable are also used by telephone companies from their central office to the telephones near users. This is also widely installed for use in business and corporation Ethernet and other types of local area network. Coaxial cable is called coaxial this is because this includes one physical channel that carries the signal surrounded (after a layer of insulation) by another concentric physical channel, both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters, they can carry information for a great distance. This is a diagram shown below: UPT UPT stands for Unshielded twisted pair. This cable is the most common kind of copper telephone wiring. Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other. Each signal on twisted pair requires both wires. Since some telephone sets or desktop locations require multiple connections, twisted pair is sometimes installed in two or more pairs, all within a single cable. For some business locations, twisted pair is enclosed into a shield that functions as a ground. This is known as shielded twisted pair (STP). The twisted pair is now frequently installed with the two pairs to the home, with the extra pair making it possible for you to add another line (perhaps for use of a modem) when you will need it. These twisted pair comes with each pair uniquely colour coded when it is packaged in multiple pairs. Different uses such as analogue, digital, and Ethernet require different pair multiples. Although twisted pair is often associated with home use, with a higher grade of twisted pair is often used for horizontal wiring in LAN installations because it is less expensive than coaxial cable. The wire that you buy at a local hardware store for extensions from your phone or computer modem to a wall jack is not twisted pair. It is a side-by-side wire known as silver satin. The wall jack can have as many five kinds of hole arrangements or pin outs, depending on what kinds of wire the installation you expects that will be plugged in (for example, digital, analogue, or LAN) . (Thats why you may sometimes find when you carry your notebook computer to another location that the wall jack connections wont match your plug. ) This is a diagram shown below: Optical Fiber. Optical fiber (or fiber optic) refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic wire or fiber. Optical fiber carries much more information than the conventional copper wire and is in general not subject to electromagnetic interference and the need to retransmit signals. Most telephone company long-distance lines are now of optical fiber. Transmission on optical fiber wire requires repeaters at distance intervals. The glass fiber requires more protection within an outer cable than copper. For these reasons and because the installation of any of the new wiring is labour-intensive, few communities yet have optical fiber wires or cables from the phone companys branch office to local customers (known as local loops). A type of fiber known as single mode fiber is used for longer distances; multimode fiber is used for shorter distances. This is the diagram shown below: By analyzing and researching the three above cable I would recommend the Fiber Optic cable this is because I believe it has a high security and also has the following. Fiber optic cables have a much greater bandwidth than metal cables. This means that they can carry more data. Â  Fiber optic cables are less susceptible than metal cables to interference. Fiber optic cables are much thinner and lighter than metal wires. Data can be transmitted digitally (the natural form for computer data) rather than analogically. Identify the alternative forms of communication media and provide examples of their use in different forms of network. Microwave Microwave frequencies require a direct line of sight between sending and receiving station to operate. Microwave systems were the preferred method of communications transmission before the introduction of fiber optic. Radio The lowest-frequency domain that needed to name. This extends from wavelengths of a kilometre or so, the longest that will propagate through the interstellar medium, down to about a millimetre. The detection of radio radiation is often done using wave techniques rather than photon-counting, this is because of the low photon energies, and this offers distinct advantages for such applications as interferometer which astronomers working in the infrared and optical regimes view with some envy. From active nuclei, we often detect the synchrotron radiation in this range radiation produced energetic charged particles (mostly electrons) produce when they are deflected by the magnetic fields. a) Define the basic signal theory with the aid of diagrams? 1) In electronics, a signal is an electric current or electromagnetic field that is used to convey data from one place to another. The simplest form of signal is a direct current (DC) that is switched on and off; this is the principle by which the early telegraph worked. More complex signals consist of an alternating-current (AC) or electromagnetic carrier that contains one or more data streams. Data is superimposed on a carrier current or a wave this is by means of a process called a modulation. Signal modulation can be done by two main ways: analogue and digital. In recent years, digital modulation has been getting more common, while analogue modulation methods have been used less and less. There are still plenty of analogue signals around, however, and they will probably never become totally extinct. Except for DC signals such as telegraph and base band, all signal carriers have a definable frequency or frequencies. Signals also have a property called wavelength, which is inversely proportional to the frequency. 2) In some information technology contexts, a signal are simply that which is sent or received, thus including both the carrier and the data together. 3) In telephony, a signal has a special data that is used to set up or control communication. Almost everything in the world can be described or represented in one of two forms: analogue or digital. The principal feature of analogue representations is that they are continuous. In contrast, digital representations consist of values measured at discrete intervals. Digital watches are called digital because they go from one value to the next without displaying all intermediate values. Consequently, they can display only a finite number of times of the day. In contrast, watches with hands are analogue, this is mainly because the hands move continuously around the clock face. As the minute hand goes around, it not only touches the numbers 1 through 12, but also the infinite number of points in between. Early attempts at building computers used analogue techniques, but the accuracy and reliability were not good enough. Today, almost all computers are digital. Analogue and Digital Technology Analogue and Digital are the words we hear when people talk about Communication and Information Technology. What do the words Analogue and Digital mean? Analogy means a likeness between two things that are really quite different. For example the analogy between the brain and the computer or the heart and a pump. Digit means either a finger or toe, or one of the numbers 1 to 9. Some examples might help to explain what analogue and digital mean in technology. A simple example of analogue and digital technology Clocks are examples of analogue and digital technology. An analogue clock face can display the time without numbers. The hands keep moving all the time and they continue to rotate, just like the earth around the sun. This is the analogy between the movement of the sun and earth, and the hands of the clock. The digital clock displays the time in numbers, and the time displayed only changes at each minute. In the analogue clock the hands keep moving all the time, while the digital clock is more like an on and off movement. Each minutes the time moves and then stops for another 60 seconds, when it changes again. Some other examples of displaying information using analogue and digital forms. b) How the signal theory affects the choice of transmission methods and media? Analogue and Digital Signals Sound can be converted into analogue and digital electrical signals. Analogue Signal A microphone or handset of a telephone will convert sound into an analogue signal. The shape of the wave seen on an oscilloscope represents the volume and pitch. The diagram is shown below: This is called an analogue signal because, when the volume and pitch change, so does the shape of the wave. The signal is an analogue of the sound. Digital signal Today we see many sound systems described as digital. This means the sound is converted into digital signals so it can be transmitted or recorded. In the microphone example shown on the diagram above, the analogue signal is converted into a digital signal by electronic circuits. In a digital signal the electricity, this can be either on or off, is combined with a binary code. The voltage of the analogue signal is measured electronically, many thousands of times per second, by an analogue-digital converter. The analogue signal is converted into a 16 bit binary number, which gives 65,536 levels of voltage. In electronics 1 = ON and 0 = OFF. This means the binary number can be converted into an electrical signal. A diagram below shows the process of converting analogue signals into a binary numbers and digital signals. To keep the explanation simple the analogue signal has been converted into a 3 bit binary number, which means there are seven voltage levels. A digital-analogue converter reverses the conversion this is because the speakers (output device) need an analogue signal. Light and sound can be converted into binary numbers and digital signals that are used to record and transmit information. This diagram is shown below: Why are digital systems better than the analogue ones? An analogue signal is affected by changes in the voltage as it travels along a wire. If the voltage changes, so does the signal at the output. The digital signal is not affected by changes in the voltage this is because all that matters is whether it is ON or OFF. How signal affects transmission methods? Noise is any sound on the CD or record that wasnt there at the performance during the recording session. More generally, it is any unwanted signal that adds on to the information that is being transmitted. When a vinyl record is being made, noise is introduced at every step of the recording process, although of course the company makes an every effort to reduce such noise to as low a level as possible. The sound that reaches the microphones is converted into an electrical signal that is then recorded on a wide magnetic tape moving at high speed. This tape is then used to control the cutting of a master disc, from which moulds are then made. These in turn are used to mass-produce the records that are eventually sold in shops. Noise is produced at every step, not forgetting that introduced by your own stereo equipment. It can never be entirely eliminated. The same problems of noise are shared by any method of transmitting information, and are certainly by telecommunications, including telephone calls. In the production of vinyl records, the companies have used purely analogue this means to transfer the information representing the sound of the music from one point to another. That means they use an electrical signal that changes smoothly in strength, exactly modelling the smooth but complex changes in the sound. When a noise is created in the recording process because of tape hiss, dust on the master disc, electrical interference or any other cause this is added on as a random signal on top of the complex electrical signal representing the sound. There is no way that electronic equipment can tell such random noise from the original electrical signal, so there is no way it can be removed again without removing some of the original signal. We can see more clearly if we draw a graph of the level of the analogue audio signal over a period of time (diagram 1a). The shape of this graph represents both the changes in the electrical sound and the changes in the electrical signal that model it. Now if we add to this audio signal some random noise, this affects the shape of the signal, and this degrades the sound that your stereo reproduces (diagram 1b). The trouble with an analogue audio signal is that its exact shape has to be preserved if you are to hear the music exactly as it was when it was played. If there were a means of transmitting the signal so that only the overall shape of the signal mattered, then noise would not be so important. The port authorities used to find the shape of the bottom of the harbour, so that ships could navigate more safely. It certainly wasnt possible to drain the harbour and take a photograph of it, so what they did instead was send out a boat which travelled slowly across the harbour. Every few meters a person at the back of the boat dropped down a plumb-line (a weight at the end of a rope), until it reached the bottom of the harbour. The line had knots tied in it at regular spaces and the person called out the number of knots under water, so indicating the depth of the harbour at that point. A clerk wrote these down, and eventually it was possible for him to draw a graph of the shape of the harbour by using these numbers. The person in the boat had been taking samples of the depth of the harbour at frequent intervals, so that the graph would accurately describe the ups and downs of the harbour bottom.

Dispersion Properties of the Propagation of Linear Waves

Dispersion Properties of the Propagation of Linear Waves ABSTRACT In electron-positron plasmas some of the plasma modes are decoupled due to the equal charge to mass ratio of both species. The dispersion properties of the propagation of linear waves in degenerate electron–positron magnetoplasma are investigated. By using the quantum hydrodynamic equations with magnetic fields of the Wigner–Maxwell system, we have obtained a set of new dispersion relations in which ions’ motions are not considered. The general dielectric tensor is derived using the electron and positron densities and its momentum response to the quantum effects due to Bohm potential and the statistical effect of Femi temperature. It has been demonstrated the importance of magnetic field and its role with the quantum effects in these plasmas which support the propagation of electromagnetic linear waves. Besides, the dispersion relations in case of parallel and perpendicular modes are investigated for different positron-electron density ratios. Keywords: Quantum Plasma; Dispersion relation ; Electron –Positron 1- INTRODUCTION Electron-positron (e-p) plasmas are found in the early universe, in astrophysical objects (e.g., pulsars, super nova remnants, and active galactic nuclei, in ÃŽ ³ -ray bursts, and at the center of the Milky Way galaxy [1]. In such physical systems, the e-p pairs can be created by collisions between particles that are accelerated by electromagnetic and electrostatic waves and/or by gravitational forces. Intense laser-plasma interaction experiments have reported the production of MeV electrons and conclusive evidence of positron production via electron collisions. Positrons have also been created in post disruption plasmas in large tokamaks through collisions between MeV electrons and thermal particles. The progress in the production of positron plasmas of the past two decades makes it possible to consider laboratory experiments on e-p plasmas [2]. The earlier theoretical studies on linear waves in electron–positron plasmas have largely focused on the relativistic regime relevant to astrophysical contexts [3]. This is largely due to the fact that the production of these electron–positron pairs requires high-energy processes. In laboratory plasmas non-relativistic electron–positron plasmas can be created by using two different schemes. In one scheme, a relativistic electron beam when impinges on high Z-target produces positrons in abundance. The relativistic pair of electrons and positrons is then trapped in a magnetic mirror and cools down rapidly by radiation, thus producing non-relativistic pair plasmas. In another scheme positrons can be accumulated from a radioactive source. Such non-relativistic electron–positron plasmas have been produced in the laboratory by many researchers. This has given an impetus to many theoretical works on non-relativistic electron–positron plasmas. Stewart and Laing [4] studied the dispersion properties of linear waves in equal-mass plasmas and found that due to the special symmetry of such plasmas, well known phenomena such as Faraday rotation and whistler wave modes disappear. Iwamoto [5] studied the collective modes in non-relativistic electron–positron plasmas using the kinetic approach. He found that the dispersion relations for longitudinal modes in electron–positron plasma for both unmagnetized and magnetized electron–positron plasmas were similar to the modes in one-component electron or electron–ion plasmas. The transverse modes for the unmagnetized case were also found to be similar. However, the transverse modes in the presence of a magnetic field were found to be different from those in electron–ion plasmas. Studies of wave propagation in electron–positron plasmas contin ue to highlight the role played by the equal mass of electrons and positrons. For example, the low frequency ion acoustic wave, a feature of electron–ion plasmas due to significantly different masses of electrons and ions, has no counterpart in electron–positron plasma. Shukla et al [6] derived a new dispersion relation for low-frequency electrostatic waves in strongly magnetized non-uniform electron–positron plasma. They showed that the dispersion relation admits a new purely growing instability in the presence of equilibrium density and magnetic field inhomogeneties. Linear electrostatic waves in a magnetized four-component, two-temperature electron–positron plasma are investigated by Lazarus et al in Ref. [7]. They have derived a linear dispersion relation for electrostatic waves for the model and analyzed for different wave modes. Dispersion characteristics of these modes at different propagation angles are studied numerically. In this work, The dispersion properties of the propagation of linear waves in degenerate electron–positron magnetoplasma are investigated. By using the quantum hydrodynamic equations with magnetic fields of the Wigner–Maxwell system, we have obtained a set of new dispersion relations in which ions’ motions are not considered. The general dielectric tensor is derived using the electron and positron densities and its momentum response to the quantum effects due to Bohm potential and the statistical effect of Femi temperature. 2- MODELING EQUATIONS We consider quantum plasma composed of electrons and positrons whose background stationary ions. The plasma is immersed in an external magnetic field . The quasi-neutrality condition reads as . From model, the dynamics of these particles are governed by the following continuity equation and the momentum equation: (1) (2) Here and are the number density, the velocity and the mass of particle respectively () and is the plank constant divided by. Let electrons and positrons obey the following pressure law: Where, is the Fermi thermal speed, is the particle Fermi temperature, is the Boltzmann’s constant and is the equilibrium particle number density. We have included both the quantum statistical effects through Fermi temperature and the quantum diffraction in the –dependent. If we set equal to zero and equal the temperature of electrons and positrons, we obtain the classical hydrodynamic equation. Assuming that the plasma is isothermal, the Fermi speeds for different particles may be equal. Using the perturbation technique, assume the quantity representing (n, u, B, E) has the following form where is the unperturbed value and is a small perturbation . Assuming the equilibrium electric field is zero and linearizing the continuity and the momentum equations, we have: (3) (4) Multiplying equation (4) by and Simplifying, we can obtain the following equation: (5) where, , , and Assuming, , then the three components of the fluid velocity can be written as: (6a) (6b) (6c) Where, and The current density and the dielectric permeability of the medium are given: (7) (8) where is the unit tensor. So, we can obtain the dielectric tensor as follows: (9) Where, Then, according to equations (8), (9) The propagation of different electromagnetic linear waves in quantum plasma can be obtained from the following general dispersion relation: (10) Where, is the plasma frequency and . 3- DISCUSSION In this section, we focus our attention on the discussion of some different modes in two cases that the wave vector parallel and perpendicular to the magnetic field . (3.I) Parallel modes So, this case leads to, with . Therefore the general dispersion relation (10) becomes: (11) This gives two dispersion relations. The first one () investigates the dispersion of electrostatic quantum waves included the quantum effects as follows (12) By neglecting the quantum effects, equation (11) describes the following well-known classical modes The second dispersion equation gives: (13) Equation (13) is similar to the dispersion of left and right waves (L- and R- modes). Owing to the symmetry between the positively and negatively charged particles, the dispersion relation for the right circularly polarized wave is identical to the left circularly polarized wave. It has been noted that no quantum effects on these modes. For unmagnetized plasma , the dispersion relation becomes: (14) (3.II) Perpendicular mode In this case, we have So, the general dispersion relation (10) becomes: (15) Where it has the following new elements , , , , , , , In the case of unmagnetized plasma , we have the following two dispersion equations: (16) and (17) The equation (16) is the well known dispersion relation which investigates the propagation of electromagnetic waves in classical unmagnetized plasma.The damping is absent because the phase velocity of the wave obtained from this equation is always greater than the velocity of light, so that no particles can be resonant with the wave. This results is analogous to the one-component electron plasma [5]. While the other relation (17) indicates the dispersion of the waves in electron-positron plasma under the quantum effects. 4- NUMERICAL ANALYSIS AND RESULTS In this section, we are going to investigate the above dispersion relations numerically. Introducing the normalized quantities , , , , and the plasmonic coupling () which describes the ratio of plasmonic energy density to the electron Fermi energy density, we rewrite some of the dispersion relations in both of parallel and perpendicular modes. (4.I) Parallel modes In the first, equation (12), () becomes: (18) Where, . The dispersion relation (17) has two positive solutions, Fig 1, for positron electron density ration with and .One of solutions of the dispersion equation (19) can be investigated in Fig. (2) to study the parallel modes for different density ratios with in quantum plasma . The solution of the normalized dispersion equation (17) has been also displayed in 3D figure (3) for quantum unmagnetized plasma . It is clear from the previous figures that the dispersion relations depend strongly on the density ratio of positron to electron. As the positron density is increased to equal to the electron density, the phase velocity has been increased. In the beginning, with very small positron density the wave frequency equals the electron plasma frequency and decreased with positron density increased. Besides, in the Fig. (4), the dispersion relation of parallel modes is shown for different quantum ratios , in the case of positron-electron density ratio and equal velocities of them . It is clear that the phase velocity of the mode is increased with the increases of plasmonic coupling ratio. (4.II) Perpendicular mode In the case of perpendicular modes, equation (15) can be normalized and solved numerically (here, ). Figure (5) displays the dispersion curves of electromagnetic modes under the effect of different density ratios in classical plasma. Also, the other equation (16) can be solve numerically to give two real solutions. One of them is the same solution approximately of equation (15) (which is clear in Figure (6). The other solution of dispersion equation (16) is displayed in figure (7). It is clear in the figures that the dispersion curves at depend essentially on the positron-electron density ratio . As the positron density increases to equal electron density, the wave frequency is increased to be bigger than the plasma frequency. On the dispersion curves (figures (5) and (6)), it has been noted the phase velocity of modes (+ve slope of the curves) decreases as density ratio increases. But, on the figure (7), the phase velocities of these modes (-ve slope) are the same with changes of the density ratio. They tend to zero with large wave number which means that these modes cannot propagate in plasmas. Figure (8) investigates the dispersion relations of the electromagnetic waves in electron-positron plasma under the quantum effects. It is clear that, in the case of classical plasma, the wave frequency decreases as wave number increases (the phase velocity is negative). But, in the case of quantum plasma (for small ratio ), the wave frequency deceases as wave number increases (the phase velocity is negative). Then, the phase velocity and group velocity tends to zero at definite wave number () depends on the quantum ratio (). For high quantum ratio, the phase velocity starts to be +ve and increases again. 5-CONCLOUSION In this work, The dispersion properties of the propagation of linear waves in degenerate electron–positron magnetoplasma are investigated by using the quantum hydrodynamic equations with magnetic fields of the Wigner–Maxwell system. The general dielectric tensor is derived using the electron and positron densities and its momentum response to the quantum effects due to Bohm potential and the statistical effect of Femi temperature. We have obtained a set of new dispersion relations in two cases that the wave vector parallel or perpendicular to the magnetic field to investigate the linear propagation of different electromagnetic waves. It is clear that the quantum effects increase or decrease the phase velocity of the modes depends on the external magnetic field. Besides, it has shown that the dispersion curves at depend essentially on the positron-electron density ratio such as the positron density is increased to equal electron density, the wave frequency of the modes is increased.. Fig.(1). The dispersion relation (5.19) has two positive solutions for positron electron density ration with and Fig. (2) The dispersion relations of the modes for different density positron-electron ratios with and Fig. (3). The dispersion relations of the parallel modes along density ratioaxis with and Fig.(4). The dispersion relations of different modes for different quantum effects with positron-electron density ratio and velocity ratio .. , Fig. (5.5). The dispersion relations of electromagnetic modes for different ratios in classical plasma. Fig.(6). The dispersion solutions of the equations (5.17) and (5.18) for different density ratios . Fig. (7). The other dispersion solutions of the equation (18) for different density ratios . Fig.(8). 3D plotting for dispersion relation for perpendicular modes in quantum unmagnetized plasma along quantum ratio axis with