the chandrasekhar limit neutron stars and black holes
The Schwarzschild Solution and Black Holes
Ngày tải lên :
23/10/2013, 20:20
... on either side The singularity at r = is a timelike line, as in the other cases So THE SCHWARZSCHILD SOLUTION AND BLACK HOLES 207 for this black hole you can again avoid the singularity and continue ... real world black holes aren’t truly black — they radiate energy as if they were a blackbody of temperature T = h/8πkGM, where M is ¯ the mass of the hole and k is Boltzmann’s constant The derivation ... hole is an amusing theoretical toy; these solutions are often examined in studies of the information loss paradox, and the role of black holes in quantum gravity On the other hand it appears very...
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An introduction to black holes information and the string theory
Ngày tải lên :
19/01/2014, 13:57
... exploring the differences between string theory and field theory in the context of black hole paradoxes Quite apart from the question of the ultimate correctness and consistency of string theory, there ... PART Black Holes and Quantum Mechanics Chapter The Schwarzschild Black Hole Before beginning the study of the quantum theory of black holes, one must first become thoroughly familiar with the geometry ... it coincides with the future horizon of the final black hole geometry and is therefore found at r = 2M G On the other hand, the horizon also extends into the Region A where the metric is just...
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the quantum physics of black holes and string theory
Ngày tải lên :
18/04/2014, 15:30
... circle The 11-dimensional theory has 5branes and 2-branes, and the 2-brane can end on the 5-brane If we wrap on the compact circle both the 5-brane and the 2-brane that ends on it, then in the Type ... D-Branes and Black Holes 23 where V is the volume of the T in the x6 · · · x9 directions, R is the radius of the x5 circle, and g is the string coupling The charge N comes from momentum in the x5 ... away with black holes in the theory It is now fairly widely believed that black holes exist in nature Solar-mass black holes can be endpoints of stellar evolution, and supermassive black holes (∼...
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scientific american - 1993 03 - black holes and the centrifugal force paradox
Ngày tải lên :
12/05/2014, 14:49
... weight: the gravitational force and the centrifugal force To measure either one of these forces alone, Bob and Alice must change the orientation of their spaceships as they orbit the black hole; ... rotate their spacecraft so that the stretched spring always points toward a mark on the hull The direction of the spring is therefore ịxed in the ship but not in space On the other hand, the gyroscope ... gravitational ịeld of the black hole (that is, the rays were straight), the lamp would disappear behind the left part of the tube, and Alice would conclude that the tube was bent to the left If the light...
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An introduction to black holes, information and the string theory revolution
Ngày tải lên :
26/01/2015, 11:41
... exploring the differences between string theory and field theory in the context of black hole paradoxes Quite apart from the question of the ultimate correctness and consistency of string theory, there ... PART Black Holes and Quantum Mechanics Chapter The Schwarzschild Black Hole Before beginning the study of the quantum theory of black holes, one must first become thoroughly familiar with the geometry ... it coincides with the future horizon of the final black hole geometry and is therefore found at r = 2M G On the other hand, the horizon also extends into the Region A where the metric is just...
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Black holes wormholes and time machines - jim al khalili
Ngày tải lên :
17/03/2014, 14:01
... the Universe will be attracted towards each other by an invisible force The Earth and each and every object on its surface, the Earth and the Moon, the Sun and the planets, even the Sun and the ... whether Newton or the German mathematician Gottfried Leibnitz could lay claim to it In the scientific circles of the time the dispute, in which the English and the Germans each claimed that the ... of January 1643 23 BLACK HOLES, WORMHOLES & TIME MACHINES the connection between these two phenomena Attributing the motion of the Moon and the falling apple to one and the same force (gravity)...
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physics - black holes in supergravity and string theory
Ngày tải lên :
18/04/2014, 15:27
... exercises and their solutions This includes the definitions of mass, surface gravity and entropy of black holes, the laws of black hole mechanics, the interpretation of the extreme Reissner-Nordstrom black ... for the D-brane picture of black holes 2.5 Literature Our discussion of gravity and black holes and most of the exercises follow the book by Wald [1], which we recommend for further study The ... supersymmetric theories, known as type IIA and type IIB Both differ in the relative chiralities of the R-groundstates: The IIB theory is chiral, the IIA theory is not The massless spectra of the two theories...
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Báo cáo khoa học " Optimisation of extraction procedure for black fungus polysaccharides and effect of the polysaccharides on blood lipid and myocardium antioxidant enzymes activities " pdf
Ngày tải lên :
28/06/2014, 11:20
... high cholesterol diet (HCD) and the other group fed the same diet supplemented with black fungus polysaccharides (0.6% and 1.2%) Another mice fed with basic diet and served as control Diets and ... glucose and xylose, constituents The band at 2926 cm−1 is associated with the vibrations of C–H bond The band at 991 cm−1 is associated with the presence of -pyran ring, which indicated the presence ... (P model, F < 0.0001) The goodness of the model could be checked by the determination coefficient R2 (0.9355) and the multiple correlation coefficient R (0.8603) The closer the values of R (multiple...
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Báo cáo lâm nghiệp: "Nutrition of silver fir (Abies alba Mill) growing at the upper limit of its occurrence in the Šumava National Park and Protected Landscape Area" pot
Ngày tải lên :
07/08/2014, 10:21
... in other FTGs, is the only exception When comparing all the samples, the histograms show differences in the content of sulphur between the 6th altitudinal vegetation zone on the one hand and the ... (1995), and in France by Pinto et al (2008) The paper presents the results of the nutrient balance and content of the stress elements in the current year needles of fir taken in 2006 and 2007 in the ... in the Bohemian Forest was comparable with the localities in Poland and Slovakia The sulphur values range from 1,050 to 1,795 mg·kg–1 The mean is 1,348 mg·kg–1, the median 1,324 mg·kg–1 In the...
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morris and song shin-liquidity black holes
Ngày tải lên :
31/10/2014, 19:32
... liquidity black holes have the feature that they seem to gather momentum from the endogenous responses of the market participants themselves Rather like a tropical storm, they appear to gather more ... to the asset, then the payoff is given by the liquidation value of the asset at date if the loss limit is not breached, and if it is breached Thus, the expected payoff to trader i of holding the ... outcome for the trader, and the trader’s decision reflects the tradeoff between keeping his trading position open (and reaping the rewards if the liquidation value of the asset is high), against the risk...
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The phases of supersymmetric black holes in five dimensions
Ngày tải lên :
16/10/2015, 12:00
... Saturn and then discuss the phase of the non-supersymmetric zero-temperature black holes since the extremal ones are similar to the cases of the supersymmetric black hole and black ring [33] 1.2 Black ... covered by black Saturns Here Amax is the horizon area of the static Myers-Perry black hole So the full phase of vacuum black holes illustrated by the gray strip in the region of the plane (j, ... properties of the BMPV black hole and the supersymmetric black ring However, the BPS (Bogomol’nyi-Prasad-Sommerfield) equations solved by the black ring appear to be nonlinear, hence this obscures the...
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Outsourcing the Network II - Green IT and SAN
Ngày tải lên :
17/09/2012, 10:43
... lưu phục hồi liệu Lưu trữ theo kiểu truyền thống SAN-đa lưu trữ theo cấp Dual-Fabric SAN Storage Consolidation Architecture Các công nghệ • Giao thức iCSI • FCoE • Infiniband • Ảo hóa • Phần mềm ... đáng kể • Fibre Channel over Ethernet (FCOE) ảnh hưởng công nghệ đến kiến trúc lưu trữ Hype Cycle cho công nghệ lưu trữ, năm 2008 SAN solution Một nhìn tổng quan theo cấp SAN kết nối nhiều máy ... kết nối SAN • Thuộc lớp thấp: phần bao gồm kết nối thuộc tầng datalink network • Giao diện Ethernet: Ethernet thường sử dụng để kết nối máy chủ với máy chủ máy chủ với máy trạm • Fibre Channel:...
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Cambridge.University.Press.Press.Politics.and.the.Public.Sphere.in.Europe.and.North.America.1760-1820.Jul.2002.pdf
Ngày tải lên :
21/09/2012, 10:58
... variety of approaches They examine the structure of the press; the methods used to control it by political authorities and their effectiveness; the journalistic texts themselves; and the political role ... texts, their presentation and format, the topics they covered, the way issues were presented and the messages, overt and implicit, that they contained Such a comprehensive approach to the comparative ... political press was the product of the struggles for independence from Britain and to forge a new nation, and in the Netherlands, the outcome of the Patriot Revolution of the s In France...
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Cambridge.University.Press.Protecting.the.Polar.Marine.Environment.Law.and.Policy.for.Pollution.Prevention.Jan.2001.pdf
Ngày tải lên :
21/09/2012, 10:58
... Australia, Canada and the United States Donald R Rothwell and Christopher C Joyner Canada and the Arctic marine environment The United States and the Arctic marine environment Australia and the Antarctic ... of their provisions Disregarding for a moment both their unique features and the impact of the Arctic and Southern Oceans on the global environment, their sheer size deserves closer notice The ... years.30 On the other hand, some uses of the two polar oceans are similar in nature, shipping being the most important among these; ice conditions prevail in both the Arctic and the Southern Oceans.31...
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The relationship between default risk and interest rates: An empirical study research insight
Ngày tải lên :
26/10/2012, 11:21
... displays the Pearson’s correlation coefficients and their p-values for the paired variable in each time region The null hypothesis is that the correlation is equal to zero The alternative hypothesis ... over the change in the 10-year Treasury bond yield, the change in slope (defined as the difference between 10-year and 2-year Treasury bond yields), the convexity, the change in leverage, the ... BBB and maturities ranging from intermediate to long-term They find the relation between credit spreads and interest rates (level and slope) differ based on the maturity, credit ratings, and the...
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Báo cáo y học: "Genetic polymorphisms in the nucleotide excision repair pathway and lung cancer risk: A meta-analysis"
Ngày tải lên :
31/10/2012, 14:59
... transcription in the transcribed DNA strand of active genes The other is global genome repair (GGR), which removes lesions throughout the genome, including those from the nontranscribed strand in the active ... cancer and so on The random effects model incorporates an estimate of the between-study variance and tends to provide wider CIs when the results of the constituent studies differ among themselves ... around the start codon is GCCRCCAUGG, which is known as the Kozak consensus sequence [62] The R at position -3 and the G just downstream of the start codon are especially important, and the lack...
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Báo cáo y học: "The association of meat intake and the risk of type 2 diabetes may be modified by body weight"
Ngày tải lên :
31/10/2012, 16:49
... and measurement of anthropometrics and other lifestyle factors Protocols for the SWHS were approved by the Institutional Review Boards of all institutes involved in the study Dietary intake and ... cardiovascular disease between the baseline and follow-up FFQs, only dietary data from the baseline FFQ were included in this analysis For other participants the average of the baseline and follow-up FFQ ... at the time of the interview, 74,942 women remained for the SWHS The major reasons for non-participation were refusal (3.0%), absence during the enrolment period (2.6%), and other miscellaneous...
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