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Sample records for john von neumann

  1. John von Neumann and Klaus Fuchs: an Unlikely Collaboration

    NASA Astrophysics Data System (ADS)

    Bernstein, Jeremy

    2010-03-01

    I discuss the origin of the idea of making a fusion (hydrogen) bomb and the physics involved in it, and then turn to the design proposed for one by the unlikely collaborators John von Neumann and Klaus Fuchs in a patent application they filed at Los Alamos in May 1946, which Fuchs passed on to the Russians in March 1948, and which with substantial modifications was tested on the island of Eberiru on the Eniwetok atoll in the South Pacific on May 8, 1951. This test showed that the fusion of deuterium and tritium nuclei could be ignited, but that the ignition would not propagate because the heat produced was rapidly radiated away. Meanwhile, Stanislaw Ulam and C.J. Everett had shown that Edward Teller’s Classical Super could not work, and at the end of December 1950, Ulam had conceived the idea of super compression, using the energy of a fission bomb to compress the fusion fuel to such a high density that it would be opaque to the radiation produced. Once Teller understood this, he invented a greatly improved, new method of compression using radiation, which then became the heart of the Ulam-Teller bomb design, which was tested, also in the South Pacific, on November 1, 1952. The Russians have freely acknowledged that Fuchs gave them the fission bomb, but they have insisted that no one gave them the fusion bomb, which grew out of design involving a fission bomb surrounded by alternating layers of fusion and fission fuels, and which they tested on November 22, 1955. Part of the irony of this story is that neither the American nor the Russian hydrogen-bomb programs made any use of the brilliant design that von Neumann and Fuchs had conceived as early as 1946, which could have changed the entire course of development of both programs.

  2. A note on derivations of Murray–von Neumann algebras

    PubMed Central

    Kadison, Richard V.; Liu, Zhe

    2014-01-01

    A Murray–von Neumann algebra is the algebra of operators affiliated with a finite von Neumann algebra. In this article, we first present a brief introduction to the theory of derivations of operator algebras from both the physical and mathematical points of view. We then describe our recent work on derivations of Murray–von Neumann algebras. We show that the “extended derivations” of a Murray–von Neumann algebra, those that map the associated finite von Neumann algebra into itself, are inner. In particular, we prove that the only derivation that maps a Murray–von Neumann algebra associated with a factor of type II1 into that factor is 0. Those results are extensions of Singer’s seminal result answering a question of Kaplansky, as applied to von Neumann algebras: The algebra may be noncommutative and may even contain unbounded elements. PMID:24469831

  3. Approximating incompatible von Neumann measurements simultaneously

    SciTech Connect

    Heinosaari, Teiko; Jivulescu, Maria Anastasia; Reitzner, Daniel; Ziman, Mario

    2010-09-15

    We study the problem of performing orthogonal qubit measurements simultaneously. Since these measurements are incompatible, one has to accept additional imprecision. An optimal joint measurement is the one with the least possible imprecision. All earlier considerations of this problem have concerned only joint measurability of observables, while in this work we also take into account conditional state transformations (i.e., instruments). We characterize the optimal joint instrument for two orthogonal von Neumann instruments as being the Lueders instrument of the optimal joint observable.

  4. Group Theoretical Interpretation of von Neumann's Theorem on Composite Systems.

    ERIC Educational Resources Information Center

    Bergia, S.; And Others

    1979-01-01

    Shows that von Neumann's mathematical theorem on composite systems acquires a transparent physical meaning with reference to a suitable physical example; a composite system in a state of definite angular momentum. Gives an outline of the theorem, and the results are restated in Dirac's notation, thus generalizing von Neumann's results which were…

  5. Von Neumann's growth model: Statistical mechanics and biological applications

    NASA Astrophysics Data System (ADS)

    De Martino, A.; Marinari, E.; Romualdi, A.

    2012-09-01

    We review recent work on the statistical mechanics of Von Neumann's growth model and discuss its application to cellular metabolic networks. In this context, we present a detailed analysis of the physiological scenario underlying optimality à la Von Neumann in the metabolism of the bacterium E. coli, showing that optimal solutions are characterized by a considerable microscopic flexibility accompanied by a robust emergent picture for the key physiological functions. This suggests that the ideas behind optimal economic growth in Von Neumann's model can be helpful in uncovering functional organization principles of cell energetics.

  6. A proof of von Neumann's postulate in Quantum Mechanics

    SciTech Connect

    Conte, Elio

    2010-05-04

    A Clifford algebraic analysis is explained. It gives proof of von Neumann's postulate on quantum measurement. It is of basic significance to explain the problem of quantum wave function reduction in quantum mechanics.

  7. Logo and Von Neumann Ideas [and] Towards a Humanistic Use of Computers in Education = Hacia una insercion humanista de las computadoras en la educacion.

    ERIC Educational Resources Information Center

    Reggini, Horacio C.

    The first article, "LOGO and von Neumann Ideas," deals with the creation of new procedures based on procedures defined and stored in memory as LOGO lists of lists. This representation, which enables LOGO procedures to construct, modify, and run other LOGO procedures, is compared with basic computer concepts first formulated by John von Neumann.…

  8. The von Neumann Triple Point Paradox

    NASA Astrophysics Data System (ADS)

    Sanders, Richard; Tesdall, Allen M.

    We describe the problem of weak shock reflection off a wedge and discuss the triple point paradox that arises. When the shock is sufficiently weak and the wedge is thin, Mach reflection appears to be observed but is impossible according to what von Neumann originally showed in 1943. We summarize some recent numerical results for weak shock reflection problems for the unsteady transonic small disturbance equations, the nonlinear wave system, and the Euler equations. Rather than finding a standard but mathematically inadmissible Mach reflection with a shock triple point, the solutions contain a complex structure: there is a sequence of triple points and supersonic patches in a tiny region behind the leading triple point, with an expansion fan originating at each triple point. The sequence of patches may be infinite, and we refer to this structure as Guderley Mach reflection. The presence of the expansion fans at the triple points resolves the paradox. We describe some recent experimental evidence which is consistent with these numerical findings.

  9. Locally Compact Quantum Groups. A von Neumann Algebra Approach

    NASA Astrophysics Data System (ADS)

    Van Daele, Alfons

    2014-08-01

    In this paper, we give an alternative approach to the theory of locally compact quantum groups, as developed by Kustermans and Vaes. We start with a von Neumann algebra and a comultiplication on this von Neumann algebra. We assume that there exist faithful left and right Haar weights. Then we develop the theory within this von Neumann algebra setting. In [Math. Scand. 92 (2003), 68-92] locally compact quantum groups are also studied in the von Neumann algebraic context. This approach is independent of the original C^*-algebraic approach in the sense that the earlier results are not used. However, this paper is not really independent because for many proofs, the reader is referred to the original paper where the C^*-version is developed. In this paper, we give a completely self-contained approach. Moreover, at various points, we do things differently. We have a different treatment of the antipode. It is similar to the original treatment in [Ann. Sci. & #201;cole Norm. Sup. (4) 33 (2000), 837-934]. But together with the fact that we work in the von Neumann algebra framework, it allows us to use an idea from [Rev. Roumaine Math. Pures Appl. 21 (1976), 1411-1449] to obtain the uniqueness of the Haar weights in an early stage. We take advantage of this fact when deriving the other main results in the theory. We also give a slightly different approach to duality. Finally, we collect, in a systematic way, several important formulas. In an appendix, we indicate very briefly how the C^*-approach and the von Neumann algebra approach eventually yield the same objects. The passage from the von Neumann algebra setting to the C^*-algebra setting is more or less standard. For the other direction, we use a new method. It is based on the observation that the Haar weights on the C^*-algebra extend to weights on the double dual with central support and that all these supports are the same. Of course, we get the von Neumann algebra by cutting down the double dual with this unique

  10. Asymptotic structure of free product von Neumann algebras

    NASA Astrophysics Data System (ADS)

    Houdayer, Cyril; Ueda, Yoshimichi

    2016-11-01

    Let $(M, \\varphi) = (M_1, \\varphi_1) \\ast (M_2, \\varphi_2)$ be the free product of any $\\sigma$-finite von Neumann algebras endowed with any faithful normal states. We show that whenever $Q \\subset M$ is a von Neumann subalgebra with separable predual such that both $Q$ and $Q \\cap M_1$ are the ranges of faithful normal conditional expectations and such that both the intersection $Q \\cap M_1$ and the central sequence algebra $Q' \\cap M^\\omega$ are diffuse (e.g. $Q$ is amenable), then $Q$ must sit inside $M_1$. This result generalizes the previous results of the first named author in [Ho14] and moreover completely settles the questions of maximal amenability and maximal property Gamma of the inclusion $M_1 \\subset M$ in arbitrary free product von Neumann algebras.

  11. (Never) Mind your p's and q's: Von Neumann versus Jordan on the foundations of quantum theory

    NASA Astrophysics Data System (ADS)

    Duncan, A.; Janssen, M.

    2013-03-01

    In 1927, in two papers entitled "On a new foundation [Neue Begründung] of quantum mechanics," Pascual Jordan presented his version of what came to be known as the Dirac-Jordan statistical transformation theory. Jordan and Paul Dirac arrived at essentially the same theory independently of one another at around the same time. Later in 1927, partly in response to Jordan and Dirac and avoiding the mathematical difficulties facing their approach, John von Neumann developed the modern Hilbert space formalism of quantum mechanics. We focus on Jordan and von Neumann. Central to the formalisms of both are expressions for conditional probabilities of finding some value for one quantity given the value of another. Beyond that Jordan and von Neumann had very different views about the appropriate formulation of problems in quantum mechanics. For Jordan, unable to let go of the analogy to classical mechanics, the solution of such problems required the identification of sets of canonically conjugate variables, i.e., p's and q's. For von Neumann, not constrained by the analogy to classical mechanics, it required only the identification of a maximal set of commuting operators with simultaneous eigenstates. He had no need for p's and q's. Jordan and von Neumann also stated the characteristic new rules for probabilities in quantum mechanics somewhat differently. Jordan and Dirac were the first to state those rules in full generality. Von Neumann rephrased them and, in a paper published a few months later, sought to derive them from more basic considerations. In this paper we reconstruct the central arguments of these 1927 papers by Jordan and von Neumann and of a paper on Jordan's approach by Hilbert, von Neumann, and Nordheim. We highlight those elements in these papers that bring out the gradual loosening of the ties between the new quantum formalism and classical mechanics. This paper was written as part of a joint project in the history of quantum physics of the Max Planck

  12. The smooth entropy formalism for von Neumann algebras

    NASA Astrophysics Data System (ADS)

    Berta, Mario; Furrer, Fabian; Scholz, Volkher B.

    2016-01-01

    We discuss information-theoretic concepts on infinite-dimensional quantum systems. In particular, we lift the smooth entropy formalism as introduced by Renner and collaborators for finite-dimensional systems to von Neumann algebras. For the smooth conditional min- and max-entropy, we recover similar characterizing properties and information-theoretic operational interpretations as in the finite-dimensional case. We generalize the entropic uncertainty relation with quantum side information of Tomamichel and Renner and discuss applications to quantum cryptography. In particular, we prove the possibility to perform privacy amplification and classical data compression with quantum side information modeled by a von Neumann algebra.

  13. An Accurate von Neumann's Law for Three-Dimensional Foams

    SciTech Connect

    Hilgenfeldt, Sascha; Kraynik, Andrew M.; Koehler, Stephan A.; Stone, Howard A.

    2001-03-19

    The diffusive coarsening of 2D soap froths is governed by von Neumann's law. A statistical version of this law for dry 3D foams has long been conjectured. A new derivation, based on a theorem by Minkowski, yields an explicit analytical von Neumann's law in 3D which is in very good agreement with detailed simulations and experiments. The average growth rate of a bubble with F faces is shown to be proportional to F{sup 1/2} for large F , in contrast to the conjectured linear dependence. Accounting for foam disorder in the model further improves the agreement with data.

  14. Interpolatability distinguishes LOCC from separable von Neumann measurements

    SciTech Connect

    Childs, Andrew M.; Leung, Debbie; Mančinska, Laura; Ozols, Maris

    2013-11-15

    Local operations with classical communication (LOCC) and separable operations are two classes of quantum operations that play key roles in the study of quantum entanglement. Separable operations are strictly more powerful than LOCC, but no simple explanation of this phenomenon is known. We show that, in the case of von Neumann measurements, the ability to interpolate measurements is an operational principle that sets apart LOCC and separable operations.

  15. Spin torque oscillator neuroanalog of von Neumann's microwave computer.

    PubMed

    Hoppensteadt, Frank

    2015-10-01

    Frequency and phase of neural activity play important roles in the behaving brain. The emerging understanding of these roles has been informed by the design of analog devices that have been important to neuroscience, among them the neuroanalog computer developed by O. Schmitt and A. Hodgkin in the 1930s. Later J. von Neumann, in a search for high performance computing using microwaves, invented a logic machine based on crystal diodes that can perform logic functions including binary arithmetic. Described here is an embodiment of his machine using nano-magnetics. Electrical currents through point contacts on a ferromagnetic thin film can create oscillations in the magnetization of the film. Under natural conditions these properties of a ferromagnetic thin film may be described by a nonlinear Schrödinger equation for the film's magnetization. Radiating solutions of this system are referred to as spin waves, and communication within the film may be by spin waves or by directed graphs of electrical connections. It is shown here how to formulate a STO logic machine, and by computer simulation how this machine can perform several computations simultaneously using multiplexing of inputs, that this system can evaluate iterated logic functions, and that spin waves may communicate frequency, phase and binary information. Neural tissue and the Schmitt-Hodgkin, von Neumann and STO devices share a common bifurcation structure, although these systems operate on vastly different space and time scales; namely, all may exhibit Andronov-Hopf bifurcations. This suggests that neural circuits may be capable of the computational functionality as described by von Neumann.

  16. Spin torque oscillator neuroanalog of von Neumann's microwave computer.

    PubMed

    Hoppensteadt, Frank

    2015-10-01

    Frequency and phase of neural activity play important roles in the behaving brain. The emerging understanding of these roles has been informed by the design of analog devices that have been important to neuroscience, among them the neuroanalog computer developed by O. Schmitt and A. Hodgkin in the 1930s. Later J. von Neumann, in a search for high performance computing using microwaves, invented a logic machine based on crystal diodes that can perform logic functions including binary arithmetic. Described here is an embodiment of his machine using nano-magnetics. Electrical currents through point contacts on a ferromagnetic thin film can create oscillations in the magnetization of the film. Under natural conditions these properties of a ferromagnetic thin film may be described by a nonlinear Schrödinger equation for the film's magnetization. Radiating solutions of this system are referred to as spin waves, and communication within the film may be by spin waves or by directed graphs of electrical connections. It is shown here how to formulate a STO logic machine, and by computer simulation how this machine can perform several computations simultaneously using multiplexing of inputs, that this system can evaluate iterated logic functions, and that spin waves may communicate frequency, phase and binary information. Neural tissue and the Schmitt-Hodgkin, von Neumann and STO devices share a common bifurcation structure, although these systems operate on vastly different space and time scales; namely, all may exhibit Andronov-Hopf bifurcations. This suggests that neural circuits may be capable of the computational functionality as described by von Neumann. PMID:26135205

  17. The von Neumann model of measurement in quantum mechanics

    SciTech Connect

    Mello, Pier A.

    2014-01-08

    We describe how to obtain information on a quantum-mechanical system by coupling it to a probe and detecting some property of the latter, using a model introduced by von Neumann, which describes the interaction of the system proper with the probe in a dynamical way. We first discuss single measurements, where the system proper is coupled to one probe with arbitrary coupling strength. The goal is to obtain information on the system detecting the probe position. We find the reduced density operator of the system, and show how Lüders rule emerges as the limiting case of strong coupling. The von Neumann model is then generalized to two probes that interact successively with the system proper. Now we find information on the system by detecting the position-position and momentum-position correlations of the two probes. The so-called 'Wigner's formula' emerges in the strong-coupling limit, while 'Kirkwood's quasi-probability distribution' is found as the weak-coupling limit of the above formalism. We show that successive measurements can be used to develop a state-reconstruction scheme. Finally, we find a generalized transform of the state and the observables based on the notion of successive measurements.

  18. von Neumann's Law: Theoretical and Microgravity Experimental Comparison for Coarsening Diffusion in Bubble Lattices

    NASA Technical Reports Server (NTRS)

    Noever, David A.

    2000-01-01

    The effects of gravity in influencing the theoretical limit for bubble lattice coarsening and aging behavior, otherwise called von Neumann's law, is examined theoretically and experimentally. Preliminary microgravity results will be discussed.

  19. Scaling of Von Neumann Entropy at the Anderson Transition

    NASA Astrophysics Data System (ADS)

    Chakravarty, Sudip

    Extensive body of work has shown that for the model of a non-interacting electron in a random potential there is a quantum critical point for dimensions greater than two — a metal-insulator transition. This model also plays an important role in the plateau-to-plateu transition in the integer quantum Hall effect, which is also correctly captured by a scaling theory. Yet, in neither of these cases the ground state energy shows any non-analyticity as a function of a suitable tuning parameter, typically considered to be a hallmark of a quantum phase transition, similar to the non-analyticity of the free energy in a classical phase transition. Here we show that von Neumann entropy (entanglement entropy) is non-analytic at these phase transitions and can track the fundamental changes in the internal correlations of the ground state wave function. In particular, it summarizes the spatially wildly fluctuating intensities of the wave function close to the criticality of the Anderson transition. It is likely that all quantum phase transitions can be similarly described.

  20. Multiple von Neumann computers: an evolutionary approach to functional emergence.

    PubMed

    Suzuki, H

    1997-01-01

    A novel system composed of multiple von Neumann computers and an appropriate problem environment is proposed and simulated. Each computer has a memory to store the machine instruction program, and when a program is executed, a series of machine codes in the memory is sequentially decoded, leading to register operations in the central processing unit (CPU). By means of these operations, the computer not only can handle its generally used registers but also can read and write the environmental database. Simulation is driven by genetic algorithms (GAs) performed on the population of program memories. Mutation and crossover create program diversity in the memory, and selection facilitates the reproduction of appropriate programs. Through these evolutionary operations, advantageous combinations of machine codes are created and fixed in the population one by one, and the higher function, which enables the computer to calculate an appropriate number from the environment, finally emerges in the program memory. In the latter half of the article, the performance of GAs on this system is studied. Under different sets of parameters, the evolutionary speed, which is determined by the time until the domination of the final program, is examined and the conditions for faster evolution are clarified. At an intermediate mutation rate and at an intermediate population size, crossover helps create novel advantageous sets of machine codes and evidently accelerates optimization by GAs.

  1. Minimal Coupling in Koopman-von Neumann Theory

    NASA Astrophysics Data System (ADS)

    Gozzi, E.; Mauro, D.

    2002-03-01

    Classical mechanics (CM), like quantum mechanics (QM), can have an operatorial formulation. This was pioneered by Koopman and von Neumann (KvN) in the 1930s. They basically formalized, via the introduction of a classical Hilbert space, earlier work of Liouville who had shown that the classical time evolution can take place via an operator, nowadays known as the Liouville operator. In this paper we study how to perform the coupling of a point particle to a gauge field in the KvN version of CM. So we basically implement at the classical operatorial level the analog of the minimal coupling of QM. We show that, differently than in QM, not only the momenta but also other variables have to be coupled to the gauge field. We also analyze in detail how the gauge invariance manifests itself in the Hilbert space of KvN and indicate the differences with QM. As an application of the KvN method we study the Landau problem proving that there are many more degeneracies at the classical operatorial level than at the quantum one. As a second example we go through the Aharonov-Bohm phenomenon showing that, at the quantum level, this phenomenon manifests its effects on the spectrum of the quantum Hamiltonian while at the classical level there is no effect whatsoever on the spectrum of the Liouville operator.

  2. Radiometric Trouble with Rough Surfaces? ... The von Neumann Series can Help!

    NASA Astrophysics Data System (ADS)

    Davis, A. B.

    2004-05-01

    Operational retrieval methods used in surface remote sensing will generally assume that the interrogated terrain is uniform as well as flat (if not outright horizontal) at least at sub-pixel scales. Both assumptions are highly questionable. There are spectral techniques (linear un-mixing, end-members, etc.) designed to address the non-uniformity issue and adjacency effects (nonlinear mixing) near large gradients in surface albedo can be unraveled with techniques using the Green function of the aerosol atmosphere. But strong deviations from local flatness define a challenging problem in three-dimensional radiative transfer; this is especially true when the terrain has a very rough fractal shape with height variability over a wide range of scales. The source of the problem is the multiple reflections between surface elements in view of each other and is mathematically akin to the problem of multiple scattering in heterogeneous turbid media like clouds. The fundamental solution to the multiple scattering/reflection problem in transport theory is called ``successive orders-of-scattering/reflection'' by physicists and a ``von Neumann expansion'' by mathematicians. I have applied this method to the analysis of two remote sensing problems that appear to be vastly different: (1) angular dependence of effective emissivity in thermal remote sensing, and (2) biases in fine laser altimetry (such as attempted by NASA's present GLAS mission which focuses on polar ice caps). The thermal problem can be reduced to a question of mean aspect ratio in the macro-roughness of the surface. The altimetry problem calls furthermore for a roughness scale. In both cases, corrections can be made to obtain the surface property of interest: actual emissivity, and actual altitude. In both cases, Monte Carlo simulation ---another seminal contribution of John von Neumann, with others--- was the key to first inspiring and then validating the proposed analytical models with one or two free parameters

  3. Physical Realization of von Neumann Lattices in Rotating Bose Gases with Dipole Interatomic Interactions

    NASA Astrophysics Data System (ADS)

    Cheng, Szu-Cheng; Jheng, Shih-Da

    2016-08-01

    This paper reports a novel type of vortex lattice, referred to as a bubble crystal, which was discovered in rapidly rotating Bose gases with long-range interactions. Bubble crystals differ from vortex lattices which possess a single quantum flux per unit cell, while atoms in bubble crystals are clustered periodically and surrounded by vortices. No existing model is able to describe the vortex structure of bubble crystals; however, we identified a mathematical lattice, which is a subset of coherent states and exists periodically in the physical space. This lattice is called a von Neumann lattice, and when it possesses a single vortex per unit cell, it presents the same geometrical structure as an Abrikosov lattice. In this report, we extend the von Neumann lattice to one with an integral number of flux quanta per unit cell and demonstrate that von Neumann lattices well reproduce the translational properties of bubble crystals. Numerical simulations confirm that, as a generalized vortex, a von Neumann lattice can be physically realized using vortex lattices in rapidly rotating Bose gases with dipole interatomic interactions.

  4. Physical Realization of von Neumann Lattices in Rotating Bose Gases with Dipole Interatomic Interactions

    PubMed Central

    Cheng, Szu-Cheng; Jheng, Shih-Da

    2016-01-01

    This paper reports a novel type of vortex lattice, referred to as a bubble crystal, which was discovered in rapidly rotating Bose gases with long-range interactions. Bubble crystals differ from vortex lattices which possess a single quantum flux per unit cell, while atoms in bubble crystals are clustered periodically and surrounded by vortices. No existing model is able to describe the vortex structure of bubble crystals; however, we identified a mathematical lattice, which is a subset of coherent states and exists periodically in the physical space. This lattice is called a von Neumann lattice, and when it possesses a single vortex per unit cell, it presents the same geometrical structure as an Abrikosov lattice. In this report, we extend the von Neumann lattice to one with an integral number of flux quanta per unit cell and demonstrate that von Neumann lattices well reproduce the translational properties of bubble crystals. Numerical simulations confirm that, as a generalized vortex, a von Neumann lattice can be physically realized using vortex lattices in rapidly rotating Bose gases with dipole interatomic interactions. PMID:27545446

  5. Physical Realization of von Neumann Lattices in Rotating Bose Gases with Dipole Interatomic Interactions.

    PubMed

    Cheng, Szu-Cheng; Jheng, Shih-Da

    2016-01-01

    This paper reports a novel type of vortex lattice, referred to as a bubble crystal, which was discovered in rapidly rotating Bose gases with long-range interactions. Bubble crystals differ from vortex lattices which possess a single quantum flux per unit cell, while atoms in bubble crystals are clustered periodically and surrounded by vortices. No existing model is able to describe the vortex structure of bubble crystals; however, we identified a mathematical lattice, which is a subset of coherent states and exists periodically in the physical space. This lattice is called a von Neumann lattice, and when it possesses a single vortex per unit cell, it presents the same geometrical structure as an Abrikosov lattice. In this report, we extend the von Neumann lattice to one with an integral number of flux quanta per unit cell and demonstrate that von Neumann lattices well reproduce the translational properties of bubble crystals. Numerical simulations confirm that, as a generalized vortex, a von Neumann lattice can be physically realized using vortex lattices in rapidly rotating Bose gases with dipole interatomic interactions. PMID:27545446

  6. Distinguishability of countable quantum states and von Neumann lattice

    NASA Astrophysics Data System (ADS)

    Kawakubo, Ryûitirô; Koike, Tatsuhiko

    2016-07-01

    The condition for distinguishability of a countably infinite number of pure states by a single measurement is given. Distinguishability is to be understood as the possibility of an unambiguous measurement. For a finite number of states, it is known that the necessary and sufficient condition of distinguishability is that the states are linearly independent. For an infinite number of states, several natural classes of distinguishability can be defined. We give a necessary and sufficient condition for a system of pure states to be distinguishable. It turns out that each level of distinguishability naturally corresponds to one of the generalizations of linear independence to families of infinite vectors. As an important example, we apply the general theory to von Neumann’s lattice, a subsystem of coherent states which corresponds to a lattice in the classical phase space. We prove that the condition for distinguishability is that the area of the fundamental region of the lattice is greater than the Planck constant, and also find subtle behavior on the threshold. These facts reveal the measurement theoretical meaning of the Planck constant and give a justification for the interpretation that it is the smallest unit of area in the phase space. The cases of uncountably many states and of mixed states are also discussed.

  7. Gravity Effects in Diffusive Coarsening of Bubble Lattices: von Neumann's Law

    NASA Technical Reports Server (NTRS)

    Noever, David A.

    2000-01-01

    von Neumann modelled the evolution of two-dimensional soap froths as a purely diffusive phenomenon; the area growth of a given cell was found to depend only on the geometry of the bubble lattice. In the model, hexagons are stable, pentagons shrink and heptagons grow. The simplest equivalent to the area growth law is / approximately t(sub beta). The result depends on assuming (1) an incompressible gas; (2) bubble walls which meet at 120 deg and (3) constant wall thickness and curvature. Each assumption is borne out in experiments except the last one: bubble wall thickness between connecting cells varies in unit gravity because of gravity drainage. The bottom part of the soap membrane is thickened, the top part is thinned, such that gas diffusion across the membrane shows a complex dependence on gravity. As a result, experimental tests of von Neumann's law have been influenced by effects of gravity; fluid behavior along cell borders can give non-uniform wall thicknesses and thus alter the effective area and gas diffusion rates between adjacent bubbles. For area plotted as a function of time, Glazier (J.A. Glazier, S.P. Gross, and I. Stavans, Phys. Rev. A. 36, 306 (1987); J. Stavans, J.A, Glazier, Phys. Rev. Lett. 62, 1318 (1989).) suggest that in some cases their failure to observe von Neumann's predicted growth exponent ((sup beta)theor(sup =1; beta)exp(sup =0.70 + 0.10)) may have been the result of such "fluid drainage onto the lower glass plate". Additional experiments which varied plate spacing gave different beta exponents in a fashion consistent with this suggestion. During preliminary long duration experiments (approximately 100 h) aboard Spacelab-J, a low-gravity test of froth coarsening has examined (1) power law scaling of von Neumann's law (beta values) in the appropriate diffusive limits; (2) new bubble lattice dynamics such as greater fluid wetting behavior on froth membranes in low gravity; and (3) explicit relations for the gravity

  8. Discriminating between Lüders and von Neumann measuring devices: An NMR investigation

    NASA Astrophysics Data System (ADS)

    Sudheer Kumar, C. S.; Shukla, Abhishek; Mahesh, T. S.

    2016-10-01

    Quantum state after measuring a degenerate observable is given by Lüders and von Neumann state update rules. While the former preserves superpositions, the latter does not. Even though both rules are valid and realizable, which rule a given measuring device ("Black Box") obeys, depends on its internal details. Recently Hegerfeldt and Mayato (2012) [5] had formulated a protocol to discriminate between the two kinds of measuring devices. Here we have reformulated this protocol for system and measuring qubits. We then experimentally investigated this protocol on an NMR spectrometer, and found that Lüders rule is favoured.

  9. Real-space finite difference scheme for the von Neumann equation with the Dirac Hamiltonian

    NASA Astrophysics Data System (ADS)

    Schreilechner, Magdalena; Pötz, Walter

    2016-07-01

    A finite difference scheme for the numerical treatment of the von Neumann equation for the (2+1)D Dirac Hamiltonian is presented. It is based on a sequential left-right (ket-bra) application of a staggered space-time scheme for the pure-state Dirac equation and offers a numerical treatment of the general mixed-state dynamics of an isolated quantum system within the von Neumann equation. Thereby this direct scheme inherits all the favorable features of the finite-difference scheme for the pure-state Dirac equation, such as the single-cone energy-momentum dispersion, convergence conditions, and scaling behavior. A conserved functional is identified. Moreover this scheme is shown to conserve both Hermiticity and positivity. Numerical tests comprise a numerical analysis of stability, as well as the simulation of a mixed-state time-evolution of Gaussian wave functions, illustrating Zitterbewegung and transverse current oscillations. Imaginary-potential absorbing boundary conditions and parameters which pertain to topological insulator surface states were used in the numerical simulations.

  10. On von Neumann's Hypothesis of collapse of the wave function and Quantum Zeno paradox in continuous measurement

    NASA Astrophysics Data System (ADS)

    Kim, Dongil

    The experiment performed by Itano, Heinzen, Bollinger and Wineland on the quantum Zeno effect is analyzed in detail through a quantum map derived by conventional quantum mechanics based on the Schr¨odinger equation. The analysis shows that a slight modification of their experiment leads to a significantly different result from the one that is predicted through von Neumann's hypothesis of collapse of the wave function in the quantum measurement theory. This may offer a possibility of an experimental test of von Neumann's quantum measurement theory.

  11. Generalization of von Neumann analysis for a model of two discrete half-spaces: The acoustic case

    USGS Publications Warehouse

    Haney, M.M.

    2007-01-01

    Evaluating the performance of finite-difference algorithms typically uses a technique known as von Neumann analysis. For a given algorithm, application of the technique yields both a dispersion relation valid for the discrete time-space grid and a mathematical condition for stability. In practice, a major shortcoming of conventional von Neumann analysis is that it can be applied only to an idealized numerical model - that of an infinite, homogeneous whole space. Experience has shown that numerical instabilities often arise in finite-difference simulations of wave propagation at interfaces with strong material contrasts. These interface instabilities occur even though the conventional von Neumann stability criterion may be satisfied at each point of the numerical model. To address this issue, I generalize von Neumann analysis for a model of two half-spaces. I perform the analysis for the case of acoustic wave propagation using a standard staggered-grid finite-difference numerical scheme. By deriving expressions for the discrete reflection and transmission coefficients, I study under what conditions the discrete reflection and transmission coefficients become unbounded. I find that instabilities encountered in numerical modeling near interfaces with strong material contrasts are linked to these cases and develop a modified stability criterion that takes into account the resulting instabilities. I test and verify the stability criterion by executing a finite-difference algorithm under conditions predicted to be stable and unstable. ?? 2007 Society of Exploration Geophysicists.

  12. Analysis of Hydrogen Tunneling in an Enzyme Active Site using von Neumann Measurements

    PubMed Central

    Sumner, Isaiah; Iyengar, Srinivasan S.

    2010-01-01

    We build on our earlier quantum wavepacket study of hydrogen transfer in the biological enzyme, soybean lipoxygenase-1, by using von Neumann quantum measurement theory to gain qualitative insights into the transfer event. We treat the enzyme active site as a measurement device which acts on the tunneling hydrogen nucleus via the potential it exerts at each configuration. A series of changing active site geometries during the tunneling process effects a sequential projection of the initial, reactant state onto the final, product state. We study this process using several different kinds of von Neumann measurements and show how a discrete sequence of such measurements not only progressively increases the projection of the hydrogen nuclear wavepacket onto the product side but also favors proton over deuteron transfer. Several qualitative features of the hydrogen tunneling problem found in wavepacket dynamics studies are also recovered here. These include the shift in the “transition state” towards the reactant as a result of nuclear quantization, greater participation of excited states in the case of deuterium, and presence of critical points along the reaction coordinate that facilitate hydrogen and deuterium transfer and coincide with surface crossings. To further “tailor” the dynamics, we construct a perturbation to the sequence of measurements, that is a perturbation to the dynamical sequence of active site geometry evolution, which leads us to insight on the existence of sensitive regions of the reaction profile where subtle changes to the dynamics of the active site can have an effect on the hydrogen and deuterium transfer process. PMID:22933858

  13. Auto-validating von Neumann rejection sampling from small phylogenetic tree spaces

    PubMed Central

    2009-01-01

    Background In phylogenetic inference one is interested in obtaining samples from the posterior distribution over the tree space on the basis of some observed DNA sequence data. One of the simplest sampling methods is the rejection sampler due to von Neumann. Here we introduce an auto-validating version of the rejection sampler, via interval analysis, to rigorously draw samples from posterior distributions over small phylogenetic tree spaces. Results The posterior samples from the auto-validating sampler are used to rigorously (i) estimate posterior probabilities for different rooted topologies based on mitochondrial DNA from human, chimpanzee and gorilla, (ii) conduct a non-parametric test of rate variation between protein-coding and tRNA-coding sites from three primates and (iii) obtain a posterior estimate of the human-neanderthal divergence time. Conclusion This solves the open problem of rigorously drawing independent and identically distributed samples from the posterior distribution over rooted and unrooted small tree spaces (3 or 4 taxa) based on any multiply-aligned sequence data. PMID:19128477

  14. First principle nonlinear quantum dynamics using a correlation-based von Neumann entropy

    NASA Astrophysics Data System (ADS)

    Westermann, Till; Manthe, Uwe

    2012-05-01

    A new concept to describe the quantum dynamics in complex systems is suggested. It extends established schemes based on the Dirac-Frenkel variation principle, e.g., the multi-configurational time-dependent Hartree (MCTDH) approach. The concept is based on a correlation-based von Neumann entropy (CvN-entropy) definition measuring the complexity of the wavefunction. Equations of motion are derived using a CvN-entropy constraint in the variational principle and result in a generally applicable effective Hamiltonian. It consists of the standard Hamilton operator and an additional nonlinear operator which limits the complexity of the wavefunction. Effectively, this nonlinear operator absorbs complex structures which are emerging in the wavefunction and allows one to introduce non-norm conserving equations of motion. Important aspects of the new concept are outlined studying the wave packet propagation on the diabatic B2 potential energy surfaces of NO2. First, it is demonstrated that during standard wave packet propagation the CvN-entropy increases strongly with time roughly independent of the coordinate systems employed. Second, one finds that employing CvN-entropy constrained MCTDH propagation yields improved wave function accuracy on longer time scales while compromising on the short time accuracy. Third, the loss of the wavefunction's norm is directly related to the overlap with the exact wavefunction. This provides an error estimate available without knowing an exact reference.

  15. First principle nonlinear quantum dynamics using a correlation-based von Neumann entropy.

    PubMed

    Westermann, Till; Manthe, Uwe

    2012-05-28

    A new concept to describe the quantum dynamics in complex systems is suggested. It extends established schemes based on the Dirac-Frenkel variation principle, e.g., the multi-configurational time-dependent Hartree (MCTDH) approach. The concept is based on a correlation-based von Neumann entropy (CvN-entropy) definition measuring the complexity of the wavefunction. Equations of motion are derived using a CvN-entropy constraint in the variational principle and result in a generally applicable effective Hamiltonian. It consists of the standard Hamilton operator and an additional nonlinear operator which limits the complexity of the wavefunction. Effectively, this nonlinear operator absorbs complex structures which are emerging in the wavefunction and allows one to introduce non-norm conserving equations of motion. Important aspects of the new concept are outlined studying the wave packet propagation on the diabatic B(2) potential energy surfaces of NO(2). First, it is demonstrated that during standard wave packet propagation the CvN-entropy increases strongly with time roughly independent of the coordinate systems employed. Second, one finds that employing CvN-entropy constrained MCTDH propagation yields improved wave function accuracy on longer time scales while compromising on the short time accuracy. Third, the loss of the wavefunction's norm is directly related to the overlap with the exact wavefunction. This provides an error estimate available without knowing an exact reference. PMID:22667549

  16. A novel method for the measurement of the von Neumann spike in detonating high explosives

    NASA Astrophysics Data System (ADS)

    Sollier, A.; Bouyer, V.; Hébert, P.; Doucet, M.

    2016-06-01

    We present detonation wave profiles measured in T2 (97 wt. % TATB) and TX1 (52 wt. % TATB and 45 wt. % HMX) high explosives. The experiments consisted in initiating a detonation wave in a 15 mm diameter cylinder of explosive using an explosive wire detonator and an explosive booster. Free surface velocity wave profiles were measured at the explosive/air interface using a Photon Doppler Velocimetry system. We demonstrate that a comparison of these free surface wave profiles with those measured at explosive/window interfaces in similar conditions allows to bracket the von Neumann spike in a narrow range. For T2, our measurements show that the spike pressure lies between 35.9 and 40.1 GPa, whereas for TX1, it lies between 42.3 and 47.0 GPa. The numerical simulations performed in support to these measurements show that they can be used to calibrate reactive burn models and also to check the accuracy of the detonation products equation of state at low pressure.

  17. Non-Equilibrium Zeldovich-Von Neumann-Doring Theory and Reactive Flow Modeling of Detonation

    SciTech Connect

    Tarver, C M; Forbes, J W; Urtiew, P A

    2002-05-02

    This paper discusses the Non-Equilibrium Zeldovich - von Neumann - Doring (NEZND) theory of self-sustaining detonation waves and the Ignition and Growth reactive flow model of shock initiation and detonation wave propagation in solid explosives. The NEZND theory identified the non-equilibrium excitation processes that precede and follow the exothermic decomposition of a large high explosive molecule into several small reaction product molecules. The thermal energy deposited by the leading shock wave must be distributed to the vibrational modes of the explosive molecule before chemical reactions can occur. The induction time for the onset of the initial endothermic reactions can be calculated using high pressure, high temperature transition state theory. Since the chemical energy is released well behind the leading shock front of a detonation wave, a physical mechanism is required for this chemical energy to reinforce the leading shock front and maintain its overall constant velocity. This mechanism is the amplification of pressure wavelets in the reaction zone by the process of de-excitation of the initially highly vibrationally excited reaction product molecules. This process leads to the development of the three-dimensional structure of detonation waves observed for all explosives. For practical predictions of shock initiation and detonation in hydrodynamic codes, phenomenological reactive flow models have been developed. The Ignition and Growth reactive flow model of shock initiation and detonation in solid explosives has been very successful in describing the overall flow measured by embedded gauges and laser interferometry. This reactive flow model uses pressure and compression dependent reaction rates, because time resolved experimental temperature data is not yet available. Since all chemical reaction rates are ultimately controlled by temperature, the next generation of reactive flow models will use temperature dependent reaction rates. Progress on a

  18. Stochastic wave packet vs. direct density matrix solution of Liouville-von Neumann equations for photodesorption problems

    NASA Astrophysics Data System (ADS)

    Saalfrank, Peter

    1996-11-01

    The performance of stochastic wave packet approaches is contrasted with a direct method to numerically solve quantum open system Liouville-von Neumann equations for photodesorption problems. As a test case a simple one-dimensional two-state state model representative for NO/Pt(111) is adopted. Both desorption induced by electronic transitions (DIET) treated by a single-dissipative channel model, and desorption induced by multiple electronic transitions (DIMET) treated by a double-dissipative channel model, are considered. It is found that stochastic wave packets are a memory-saving alternative to direct matrix propagation schemes. However, if statistically rare events as for example the bond breaking in NO/Pt(111) are of interest, the former converges only slowly to the exact results. We also find that - in the case of coordinate-independent rates - Gadzuk's "jumping wave packet and weighted average" procedure frequently employed to describe DIET dynamics, is a rapidly converging variant of the stochastic wave packet approach, and therefore rigorously equivalent to the exact solution of a Liouville-von Neumann equation. The usual stochastic (Monte Carlo) wave packet approach, however, is more generally applicable, and allows for example to quantify the notion of "multiple" in DIMET processes.

  19. Analytical reconsideration of the von Neumann paradox in the reflection of a shock wave over a wedge

    NASA Astrophysics Data System (ADS)

    Vasilev, Eugene I.; Elperin, Tov; Ben-Dor, Gabi

    2008-04-01

    The reflection of weak shock waves has been reconsidered analytically using shock polars. Based on the boundary condition across the slipstream, the solutions of the three-shock theory (3ST) were classified as "standard-3ST solutions" and "nonstandard-3ST solutions." It was shown that there are two situations in the nonstandard case: A situation whereby the 3ST provides solutions of which at least one is physical and a situation when the 3ST provides a solution which is not physical, and hence a reflection having a three-shock confluence is not possible. In addition, it is shown that there are initial conditions for which the 3ST does not provide any solution. In these situations, a four-wave theory, which is also presented in this study, replaces the 3ST. It is shown that four different wave configurations can exist in the weak shock wave reflection domain, a Mach reflection, a von Neumann reflection, a ?R (this reflection is not named yet!), and a modified Guderley reflection (GR). Recall that the wave configuration that was hypothesized by Guderley ["Considerations of the structure of mixed subsonic-supersonic flow patterns," Air Materiel Command Technical Report No. F-TR-2168-ND, ATI No. 22780, GS-AAF-Wright Field No. 39, U.S. Wright-Patterson Air Force Base, Dayton, OH (October 1947); Theorie Schallnaher Strömungen (Springer-Verlag, Berlin, 1957)] and later termed Guderley reflection did not include a slipstream (see Fig. 7). Our numerical study revealed that the wave structure proposed by Guderley must be complemented by a slipstream (see Fig. 4) in order to be relevant for explaining the von Neumann paradox. Hereafter, for simplicity, this modified GR wave configuration will be also termed Guderley reflection. The domains and transition boundaries between these four types of reflection are elucidated.

  20. Wonder or fake - investigations in the case of the stigmatisation of Therese Neumann von Konnersreuth.

    PubMed

    Rolf, Burkhard; Bayer, Birgit; Anslinger, Katja

    2006-03-01

    We investigated two compresses used by Therese Neumann (T.N.), a woman who lived from 1898 until 1962 in Konnersreuth, Germany. The compresses were soaked with blood during the appearance of stigmata on T.N.'s body on a Friday. T.N. became very popular among the faithful in Germany at this time. The question was whether this blood was from T.N. herself or from a family relative or an animal. The comparison of the HV1 and HV2 mtDNA sequence obtained from the compresses with the sequences from a reference sample from a maternally related niece of T.N. revealed an identity. Furthermore, we obtained a short tandem repeat (STR) profile from the bloodstains that were identical with the STR profile from a gummed envelope. The envelope contained a letter written by T.N. in the 1930s. Therefore, our investigations gave no indication for any manipulation. PMID:16158311

  1. Context-invariant quasi hidden variable (qHV) modelling of all joint von Neumann measurements for an arbitrary Hilbert space

    NASA Astrophysics Data System (ADS)

    Loubenets, Elena R.

    2015-03-01

    We prove the existence for each Hilbert space of the two new quasi hidden variable (qHV) models, statistically noncontextual and context-invariant, reproducing all the von Neumann joint probabilities via non-negative values of real-valued measures and all the quantum product expectations—via the qHV (classical-like) average of the product of the corresponding random variables. In a context-invariant model, a quantum observable X can be represented by a variety of random variables satisfying the functional condition required in quantum foundations but each of these random variables equivalently models X under all joint von Neumann measurements, regardless of their contexts. The proved existence of this model negates the general opinion that, in terms of random variables, the Hilbert space description of all the joint von Neumann measurements for dim H ≥ 3 can be reproduced only contextually. The existence of a statistically noncontextual qHV model, in particular, implies that every N-partite quantum state admits a local quasi hidden variable model introduced in Loubenets [J. Math. Phys. 53, 022201 (2012)]. The new results of the present paper point also to the generality of the quasi-classical probability model proposed in Loubenets [J. Phys. A: Math. Theor. 45, 185306 (2012)].

  2. Context-invariant quasi hidden variable (qHV) modelling of all joint von Neumann measurements for an arbitrary Hilbert space

    SciTech Connect

    Loubenets, Elena R.

    2015-03-15

    We prove the existence for each Hilbert space of the two new quasi hidden variable (qHV) models, statistically noncontextual and context-invariant, reproducing all the von Neumann joint probabilities via non-negative values of real-valued measures and all the quantum product expectations—via the qHV (classical-like) average of the product of the corresponding random variables. In a context-invariant model, a quantum observable X can be represented by a variety of random variables satisfying the functional condition required in quantum foundations but each of these random variables equivalently models X under all joint von Neumann measurements, regardless of their contexts. The proved existence of this model negates the general opinion that, in terms of random variables, the Hilbert space description of all the joint von Neumann measurements for dimH≥3 can be reproduced only contextually. The existence of a statistically noncontextual qHV model, in particular, implies that every N-partite quantum state admits a local quasi hidden variable model introduced in Loubenets [J. Math. Phys. 53, 022201 (2012)]. The new results of the present paper point also to the generality of the quasi-classical probability model proposed in Loubenets [J. Phys. A: Math. Theor. 45, 185306 (2012)].

  3. Comparison between Utsu's and Vere-Jones' aftershocks model by means of a computer simulation based on the acceptance-rejection sampling of von Neumann

    NASA Astrophysics Data System (ADS)

    Reyes, J.; Morales-Esteban, A.; González, E.; Martínez-Álvarez, F.

    2016-07-01

    In this research, a new algorithm for generating a stochastic earthquake catalog is presented. The algorithm is based on the acceptance-rejection sampling of von Neumann. The result is a computer simulation of earthquakes based on the calculated statistical properties of each zone. Vere-Jones states that an earthquake sequence can be modeled as a series of random events. This is the model used in the proposed simulation. Contrariwise, Utsu indicates that the mainshocks are special geophysical events. The algorithm has been applied to zones of Chile, China, Spain, Japan, and the USA. This allows classifying the zones according to Vere-Jones' or Utsu's model. The results have been quantified relating the mainshock with the largest aftershock within the next 5 days (which has been named as Bath event). The results show that some zones fit Utsu's model and others Vere-Jones'. Finally, the fraction of seismic events that satisfy certain properties of magnitude and occurrence is analyzed.

  4. German-American Cultural Interaction in the Jacksonian Era: Six Unpublished Letters by Francis Lieber and John Pickering to Wilhelm von Humboldt.

    ERIC Educational Resources Information Center

    Mueller-Vollmer, Kurt

    1998-01-01

    Letters by German-American writer and political scientist Francis Lieber and American lawyer and linguist John Pickering to Wilhem von Humboldt in Berlin, published here for the first time, give insight into the cultural interaction between Germany and the United States during the Jacksonian era, and may open new perspectives for German-American…

  5. Analyzing Von Neumann machines using decentralized symmetries

    NASA Astrophysics Data System (ADS)

    Fang, Jie

    2013-10-01

    The artificial intelligence method to e-business is defined not only by the study of fiber-optic cables, but also by the unproven need for vacuum tubes. Given the current status of virtual archetypes, theorists clearly desire the exploration of semaphores, which embodies the compelling principles of cryptoanalysis. We present an algorithm for probabilistic theory (Buck), which we use to disprove that write-back caches can be made decentralized, lossless, and reliable.

  6. Carl Neumann's Contributions to Electrodynamics

    NASA Astrophysics Data System (ADS)

    Schlote, Karl-Heinz

    2004-09-01

    I examine the publications of Carl Neumann (1832 1925) on electrodynamics, which constitute a major part of his work and which illuminate his approach to mathematical physics. I show how Neumann contributed to physics at an important stage in its development and how his work led to a polemic with Hermann Helmholtz (1821 1894). Neumann advanced and extended the ideas of the Königsberg school of mathematical physics. His investigations were aimed at founding a mathematically exact physical theory of electrodynamics, following the approach of Carl G.J. Jacobi (1804 1851) on the foundation of a physical theory as outlined in Jacobi’s lectures on analytical mechanics. Neumann’s work also shows how he clung to principles that impeded him in appreciating and developing new ideas such as those on field theory that were proposed by Michael Faraday (1791 1867) and James Clerk Maxwell (1831 1879).

  7. Irregular Reflection of Acoustical Shock Waves and von Neumann Paradox

    NASA Astrophysics Data System (ADS)

    Baskar, S.; Coulouvrat, F.; Marchiano, R.

    2006-05-01

    We investigate the reflection of weak acoustical shock waves grazing over a rigid surface. We define a critical parameter and examine the different types of reflection structure depending on this parameter. The study of the step shock is then extended to both N-waves and periodic saw-tooth waves, which are more realistic from an acoustical point of view. The numerical simulations reveal new reflection structures for these two waves which are not observed for step shocks. The results of the model are finally compared for periodic saw-tooth waves to ultrasonic experiments.

  8. The von Neumann paradox in weak shock reflection

    NASA Astrophysics Data System (ADS)

    Zakharian, A. R.; Brio, M.; Hunter, J. K.; Webb, G. M.

    2000-11-01

    We present a numerical solution of the Euler equations of gas dynamics for a weak-shock Mach reflection in a half-space. In our numerical solutions, the incident, reflected, and Mach shocks meet at a triple point, and there is a supersonic patch behind the triple point, as proposed by Guderley. A theoretical analysis supports the existence of an expansion fan at the triple point, in addition to the three shocks. This solution is in complete agreement with the numerical solution of the unsteady transonic small-disturbance equations obtained by Hunter & Brio (2000), which provides an asymptotic description of a weak-shock Mach reflection. The supersonic patch is extremely small, and this work is the first time it has been resolved in a numerical solution of the Euler equations. The numerical solution uses six levels of grid refinement around the triple point. A delicate combination of numerical techniques is required to minimize both the effects of numerical diffusion and the generation of numerical oscillations at grid interfaces and shocks.

  9. Dr. von Braun at 'Wernher von Braun Day' Celebration

    NASA Technical Reports Server (NTRS)

    1970-01-01

    In 1970 Marshall Space Flight Center (MSFC) Director Dr. Wernher von Braun (right) was reassigned to NASA Headquarters to serve as Deputy Associate Administrator for Plarning. Prior to his transfer, Dr. von Braun was honored for his career in Huntsville, Alabama, with the celebration of 'Wernher von Braun Day.' Among those participating were Alabama Governor Albert Brewer (left) and Alabama Senator John Sparkman (center). (Courtesy of Huntsville/Madison County Public library)

  10. Spectral properties of ghost Neumann matrices

    SciTech Connect

    Bonora, L.; Santos, R. J. Scherer; Tolla, D. D.

    2008-05-15

    We continue the analysis of the ghost wedge states in the oscillator formalism by studying the spectral properties of the ghost matrices of Neumann coefficients. We show that the traditional spectral representation is not valid for these matrices and propose a new heuristic formula that allows one to reconstruct them from the knowledge of their eigenvalues and eigenvectors. It turns out that additional data, which we call boundary data, are needed in order to actually implement the reconstruction. In particular our result lends support to the conjecture that there exists a ghost three strings vertex with properties parallel to those of the matter three strings vertex.

  11. Strong curvature effects in Neumann wave problems

    SciTech Connect

    Willatzen, M.; Pors, A.; Gravesen, J.

    2012-08-15

    Waveguide phenomena play a major role in basic sciences and engineering. The Helmholtz equation is the governing equation for the electric field in electromagnetic wave propagation and the acoustic pressure in the study of pressure dynamics. The Schroedinger equation simplifies to the Helmholtz equation for a quantum-mechanical particle confined by infinite barriers relevant in semiconductor physics. With this in mind and the interest to tailor waveguides towards a desired spectrum and modal pattern structure in classical structures and nanostructures, it becomes increasingly important to understand the influence of curvature effects in waveguides. In this work, we demonstrate analytically strong curvature effects for the eigenvalue spectrum of the Helmholtz equation with Neumann boundary conditions in cases where the waveguide cross section is a circular sector. It is found that the linear-in-curvature contribution originates from parity symmetry breaking of eigenstates in circular-sector tori and hence vanishes in a torus with a complete circular cross section. The same strong curvature effect is not present in waveguides subject to Dirichlet boundary conditions where curvature contributions contribute to second-order in the curvature only. We demonstrate this finding by considering wave propagation in a circular-sector torus corresponding to Neumann and Dirichlet boundary conditions, respectively. Results for relative eigenfrequency shifts and modes are determined and compared with three-dimensional finite element method results. Good agreement is found between the present analytical method using a combination of differential geometry with perturbation theory and finite element results for a large range of curvature ratios.

  12. John Napier

    ERIC Educational Resources Information Center

    Bryant, Kylie; Scott, Paul

    2004-01-01

    John Napier was born in 1550 in the Tower of Merchiston, near Edinburgh, Scotland. Napier's work on logarithms greatly influenced the work that was to be done in the future. The logarithm's ability to simplify calculations meant that Kepler and many others were able to find the relationships and formulas for motion of bodies. In turn, Kepler's…

  13. Dirichlet-to-Neumann maps on bounded Lipschitz domains

    NASA Astrophysics Data System (ADS)

    Behrndt, J.; ter Elst, A. F. M.

    2015-12-01

    The Dirichlet-to-Neumann map associated to an elliptic partial differential equation becomes multivalued when the underlying Dirichlet problem is not uniquely solvable. The main objective of this paper is to present a systematic study of the Dirichlet-to-Neumann map and its inverse, the Neumann-to-Dirichlet map, in the framework of linear relations in Hilbert spaces. Our treatment is inspired by abstract methods from extension theory of symmetric operators, utilizes the general theory of linear relations and makes use of some deep results on the regularity of the solutions of boundary value problems on bounded Lipschitz domains.

  14. Dr. von Braun Escorts President Kennedy and Vice President Johnson

    NASA Technical Reports Server (NTRS)

    1962-01-01

    Marshall Space Flight Center Director Dr. Wernher von Braun explains a detail from a Saturn IB mockup and engine to President John F. Kennedy, Vice President Lyndon Johnson and other guests, September 11, 1962.

  15. On Neumann and Poincare problems for Laplace equation

    NASA Astrophysics Data System (ADS)

    Ryazanov, Vladimir

    2016-08-01

    It is proved the existence of nonclassical solutions of the Neumann problem for the harmonic functions in the Jordan rectifiable domains with arbitrary measurable boundary distributions of normal derivatives. The same is stated for a special case of the Poincare problem on directional derivatives. Moreover, it is shown that the spaces of the found solutions have the infinite dimension.

  16. Eigenvalues of the Neumann Laplacian in symmetric regions

    NASA Astrophysics Data System (ADS)

    Marrocos, Marcus A. M.; Pereira, Antônio L.

    2015-11-01

    In this work, we are concerned with the multiplicity of the eigenvalues of the Neumann Laplacian in regions of ℝn which are invariant under the natural action of a compact subgroup G of O(n). We give a partial positive answer (in the Neumann case) to a conjecture of Arnol'd [Funct. Anal. Appl. 6, 94-101 (1972)] on the transversality of the transformation given by the Dirichlet integral to the stratification in the space of quadratic forms according to the multiplicities of the eigenvalues. We show, for some classes of subgroups of O(n) that, generically in the set of G - invariant, C 2 -regions, the action is irreducible in each eigenspace Ker(Δ + λ). These classes include finite subgroups with irreducible representations of dimension not greater than 2 and, in the case n = 2, any compact subgroup of O(2). We also obtain some partial results for general compact subgroups of O(n).

  17. Coherent state transforms and the Mackey-Stone-Von Neumann theorem

    NASA Astrophysics Data System (ADS)

    Kirwin, William D.; Mourão, José M.; Nunes, João P.

    2014-10-01

    Mackey showed that for a compact Lie group K, the pair (K, C 0(K)) has a unique non-trivial irreducible covariant pair of representations. We study the relevance of this result to the unitary equivalence of quantizations for an infinite-dimensional family of K × K invariant polarizations on T*K. The Kähler polarizations in the family are generated by (complex) time-τ Hamiltonian flows applied to the (Schrödinger) vertical real polarization. The unitary equivalence of the corresponding quantizations of T*K is then studied by considering covariant pairs of representations of K defined by geometric prequantization and of representations of C 0(K) defined via Heisenberg time-(-τ) evolution followed by time-(+τ) geometric-quantization-induced evolution. We show that in the semiclassical and large imaginary time limits, the unitary transform whose existence is guaranteed by Mackey's theorem can be approximated by composition of the time-(+τ) geometric-quantization-induced evolution with the time-(-τ) evolution associated with the momentum space [W. D. Kirwin and S. Wu, "Momentum space for compact Lie groups and the Peter-Weyl theorem" (unpublished)] quantization of the Hamiltonian function generating the flow. In the case of quadratic Hamiltonians, this asymptotic result is exact and unitary equivalence between quantizations is achieved by identifying the Heisenberg imaginary time evolution with heat operator evolution, in accordance with the coherent state transform of Hall.

  18. Accurate quantum dynamics calculations using symmetrized Gaussians on a doubly dense Von Neumann lattice

    SciTech Connect

    Halverson, Thomas; Poirier, Bill

    2012-12-14

    In a series of earlier articles [B. Poirier, J. Theor. Comput. Chem. 2, 65 (2003); B. Poirier and A. Salam, J. Chem. Phys. 121, 1690 (2004); and ibid. 121, 1704 (2004)], a new method was introduced for performing exact quantum dynamics calculations. The method uses a 'weylet' basis set (orthogonalized Weyl-Heisenberg wavelets) combined with phase space truncation, to defeat the exponential scaling of CPU effort with system dimensionality-the first method ever able to achieve this long-standing goal. Here, we develop another such method, which uses a much more convenient basis of momentum-symmetrized Gaussians. Despite being non-orthogonal, symmetrized Gaussians are collectively local, allowing for effective phase space truncation. A dimension-independent code for computing energy eigenstates of both coupled and uncoupled systems has been created, exploiting massively parallel algorithms. Results are presented for model isotropic uncoupled harmonic oscillators and coupled anharmonic oscillators up to 27 dimensions. These are compared with the previous weylet calculations (uncoupled harmonic oscillators up to 15 dimensions), and found to be essentially just as efficient. Coupled system results are also compared to corresponding exact results obtained using a harmonic oscillator basis, and also to approximate results obtained using first-order perturbation theory up to the maximum dimensionality for which the latter may be feasibly obtained (four dimensions).

  19. President Kennedy, Vice President Johnson and Dr. von Braun at Redstone Airfield

    NASA Technical Reports Server (NTRS)

    1962-01-01

    President John F. Kennedy, Vice President Lyndon B. Johnson and Marshall Space Flight Center Director Dr. Wernher von Braun at the Redstone Arsenal Airfield, September 11, 1962. Kennedy and Johnson visited the Marshall Center to tour national space facilities.

  20. John Glenn - Mini Biography

    NASA Technical Reports Server (NTRS)

    1963-01-01

    Mini Biography of John Glenn, as it was up to 1962. From film to tape transfer of the film 'Friendship 7 - John Glenn' Depicts the historical orbital flight of John Glenn aboard 'Friendship 7', launched on February 20, 1962. Footage of staff at tracking stations worldwide and at Goddard Space Flight Center. Launch from cape canaveral. Flight tracking, re-entry, landing and recovery of Friendship 7.

  1. Theodore von Karman

    NASA Technical Reports Server (NTRS)

    1950-01-01

    Dr. Theodore von Karman, co-founder of the Jet Propulsion Laboratory (JPL) Pasadena, California was an aeronautical theoretician. His contributions in the fields of aerodynamics and aeronautical engineering are well documented and well known to every aerospace engineer. He was the first winner of the prestigious U.S. Medal of Science presented to him by President John F. Kennedy. As well as being co-founder of JPL, he also was principal founder of a major rocket propulsion firm (Aerojet-General Corp.), the top science advisor to the U.S. Air Force during its transition to jet propulsion aircraft and the top science advisor to NATO. He was, during much of this time, the fountainhead of aerodynamic thought as head of the Guggenheim Aeronautical Laboratory at the California Institute of Technology (GALCIT) in Pasadena, California. In the May 1956 issue of the Journal of Aeronautical Sciences, it was said of him that 'No other man has had so great an impact on the development of aeronautical science in this country. Hundreds of young men became his students and scientific collaborators and were inspired to greater effort.' Dr. William H. Pickering, then director of JPL said in 1960 'We wouldn't have an aeronautical science as we know it today, if it weren't for Dr. Thoedore von Karman.' Under his guidance, Caltech's 10 foot wind tunnel was designed, built and operated. Industry firms such as Douglas, Northrop, Hughes, Lockheed, North American, Vultee and Consolidated all tested new aeronautical designs and concepts in GALCIT's tunnel. Even Boeing's own high-speed wind tunnel was heavily influenced by suggestions from von Karman. The National Advisory Committee for Aeronautics (NACA) became so concerned about GALCIT's growing influence over West coast aviation, it erected the Ames Laboratory in Sunnyvale, California in part to deter an ever widening aeronautical gap that had formed between NACA and GALCIT. From 1936 to 1940, Caltech stood alone as the only university

  2. Jasper Johns' Painted Words.

    ERIC Educational Resources Information Center

    Levinger, Esther

    1989-01-01

    States that the painted words in Jasper Johns' art act in two different capacities: concealed words partake in the artist's interrogation of visual perception; and visible painted words question classical representation. Argues that words are Johns' means of critiquing modernism. (RS)

  3. John Dewey, an Appreciation

    ERIC Educational Resources Information Center

    Clopton, Robert W.

    2015-01-01

    The subject of the annual Presidential address of Phi Kappa Phi, presented on May 8, 1962, was John Dewey. Dewey is identified in the public mind chiefly as an educational philosopher. In this address, the author describes the life and work of John Dewey as an indefatigable student of life whose interests ranged, like those of Aristotle, over the…

  4. Astronaut John Young's Career

    NASA Video Gallery

    John Young served as a NASA astronaut for over four decades, flying on Gemini, Apollo and the Space Shuttle. He walked on the moon during Apollo 16 in 1972 and commanded the first shuttle mission, ...

  5. Commemorating John Dyson

    NASA Astrophysics Data System (ADS)

    Pittard, Julian M.

    2015-03-01

    John Dyson was born on the 7th January 1941 in Meltham Mills, West Yorkshire, England, and later grew up in Harrogate and Leeds. The proudest moment of John's early life was meeting Freddie Trueman, who became one of the greatest fast bowlers of English cricket. John used a state scholarship to study at Kings College London, after hearing a radio lecture by D. M. McKay. He received a first class BSc Special Honours Degree in Physics in 1962, and began a Ph.D. at the University of Manchester Department of Astronomy after being attracted to astronomy by an article of Zdenek Kopal in the semi-popular journal New Scientist. John soon started work with Franz Kahn, and studied the possibility that the broad emission lines seen from the Orion Nebula were due to flows driven by the photoevaporation of neutral globules embedded in a HII region. John's thesis was entitled ``The Age and Dynamics of the Orion Nebula`` and he passed his oral examination on 28th February 1966.

  6. In AppreciationThe Depth and Breadth of John Bell's Physics

    NASA Astrophysics Data System (ADS)

    Jackiw, Roman; Shimony, Abner

    This essay surveys the work of John Stewart Bell, one of the great physicists of the twentieth century. Section 1 is a brief biography, tracing his career from working-class origins and undergraduate training in Belfast, Northern Ireland, to research in accelerator and nuclear physics in the British national laboratories at Harwell and Malvern, to his profound research on elementary particle physics as a member of the Theory Group at CERN and his equally profound ``hobby'' of investigating the foundations of quantum mechanics. Section 2 concerns this hobby, which began in his discontent with Bohr's and Heisenberg's analyses of the measurement process. He was attracted to the program of hidden variables interpretations, but he revolutionized the foundations of quantum mechanics by a powerful negative result: that no hidden variables theory that is ``local'' (in a clear and well-motivated sense) can agree with all the correlations predicted by quantum mechanics regarding well-separated systems. He further deepened the foundations of quantum mechanics by penetrating conceptual analyses of results concerning measurement theory of von Neumann, de Broglie and Bohm, Gleason, Jauch and Piron, Everett, and Ghirardi-Rimini-Weber. Bell's work in particle theory (Section 3) began with a proof of the CPT theorem in his doctoral dissertation, followed by investigations of the phenomenology of CP-violating experiments. At CERN Bell investigated the commutation relations in current algebras from various standpoints. The failure of current algebra combined with partially conserved current algebra to permit the experimentally observed decay of the neutral pi-meson into two photons stimulated the discovery by Bell and Jackiw of anomalous or quantal symmetry breaking, which has numerous implications for elementary particle phenomena. Other late investigations of Bell on elementary particle physics were bound states in quantum chromodynamics (in collaboration with Bertlmann) and

  7. [Von Hippel-Lindau syndrome].

    PubMed

    Reich, H; Hollwich, F

    1984-06-01

    The von Hippel-Lindau syndrome is an autosomal dominant condition that comprises, apart from angiomas of the retina, the cerebellum, the spinal cord, and the cerebrum, also cystic and blastomatous dysplasias resulting from maldevelopment, namely cystic kidney and pancreas, hypernephroma, and pheochromocytoma. Early observers of the syndrome were the English neurologist John Hughlings Jackson (1872) and the German ophthalmologist Hugo Magnus (1874). The typical association of angiomas of the retina with the cerebellum was first described in 1905 by the Prague ophthalmologist Wilhelm Czermak, long before Lindau (1926). The fact that hypernephromas and pheochromocytomas may form parts of it characterizes the syndrome as a polyneoplastic hereditary disease and the sufferers as members of families at risk. Since the ophthalmologist is often the first to recognize this disease by direct inspection of the fundi, he is responsible for ensuring proper medical care for the affected person and his or her entire family.

  8. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher von Braun with Dr. Eberhard Rees and R.W. Cook at a press conference concerning Dr. Von Braun's assignment to NASA headquarters and Dr. Rees' subsequent assignment as Marshall Center director.

  9. Who Killed John Keats?

    ERIC Educational Resources Information Center

    Leal, Amy

    2007-01-01

    Two months before he died, John Keats claimed he had been poisoned. Although most scholars and biographers have attributed Keats's fears of persecution, betrayal, and murder to consumptive dementia, Keats's suspicions had begun long before 1820 and were not without some justification. In this article, the author talks about the death of John…

  10. Conversations with John Williams

    ERIC Educational Resources Information Center

    Sullivan, Jack

    2007-01-01

    In this article, the author shares the views of John Williams, Hollywood's premier composer, who has written more than 300 scores, about the future of classical and film music. A gregarious person in a field requiring monklike isolation, Williams values the "association with the soloists, and the wonderful inspiration from players." His…

  11. John Carroll University

    ERIC Educational Resources Information Center

    Dean, Kathleen Lis; Rombalski, Patrick; O'Dell, Kyle

    2009-01-01

    John Carroll University (JCU) is a Jesuit Catholic institution located in University Heights, approximately 10 miles east of Cleveland, Ohio. Founded in 1888, the university has a population of 3,400 undergraduates and 800 graduate students. The Division of Student Affairs at JCU comprises 11 units. The mission of the division is the same as that…

  12. Peter Pindar (John Wolcot).

    ERIC Educational Resources Information Center

    Vales, Robert L.

    This book is designed as an introduction to John Wolcot's works for the general reader, the college student, and the college teacher. Wolcot, whose pen name was Peter Pindar, wrote topical satire on public personalities of the eighteenth century, and his methods of criticism are the motif which guides each chapter and which unites all the satires…

  13. Sir John Meurig Thomas.

    PubMed

    Thomas, John Meurig

    2013-10-11

    "My greatest achievement has been to combine being a teacher, a researcher, and a popularizer of science for over 50 years. My worst nightmare is to find myself dumbstruck when I am about to give a lecture …︁" This and more about Sir John Meurig Thomas can be found on page 10938.

  14. John Glenn's Space Ride.

    ERIC Educational Resources Information Center

    Schamel, Wynell; Potter, Lee Ann

    1998-01-01

    Reviews the accomplishments of John Glenn as a pilot, astronaut, senator, and pioneer in relation to his 1998 flight that made him the oldest person to ever travel into space. Includes photographs for students to study, and recommends classroom activities related to Glenn's career. (DSK)

  15. The John Muir Award.

    ERIC Educational Resources Information Center

    White, Graham

    2002-01-01

    The John Muir Award was established in the United Kingdom to respond to minimal environmental awareness, especially among youth. The Award has three levels of effort; all involve discovering a wild place, exploring its wildness, helping to conserve it, and sharing the experience with a wider audience. There is an effort to establish the award in…

  16. John Galen Howard.

    ERIC Educational Resources Information Center

    Draper, Joan

    1979-01-01

    A biographical sketch of John Galen Howard, founder of the Department of Architecture at the University of California at Berkeley, is presented. Howard's conservative outlook and idealistic nature are examined and his influence on the curriculum at the university is traced. (PHR)

  17. Light amplification using semiconductors

    SciTech Connect

    Dupuis, R.D.

    1987-06-01

    During the summer of 1953, John von Neumann discussed his ideas concerning light amplification using semiconductors with Edward Teller. In September of that year, von Neumann sent a manuscript containing his ideas and calculations on this subject to Teller for his comments. To the best of our knowledge, von Neumann did not take time to work further on these ideas, and the manuscript remained unpublished. These previously unpublished writings of John von Neumann on the subject of light amplification in semiconductors are printed as a service to the laser community. While von Neumann's original manuscript and his letter to Teller are available to anyone who visits the Library of Congress, it is much more convenient to have this paper appear in an archival journal.

  18. John McCain

    ERIC Educational Resources Information Center

    Phi Delta Kappan, 2008

    2008-01-01

    This article presents speeches describing John McCain's position on education posted on the McCain campaign's official web site, www.johnmccain.com. These include McCain's speech to LaRaza convention, July 14; McCain's speech to the NAACP, July 16; McCain's speech at the Greater Columbus (Ohio) Convention Center, May 15; and McCain's speech at…

  19. Standing in the gap: ref lections on translating the Jung-Neumann correspondence.

    PubMed

    McCartney, Heather

    2016-04-01

    This paper considers the experience of translating the correspondence between C.G. Jung and Erich Neumann as part of the Philemon series. The translator explores the similarities between analytical work and the task of translation by means of the concepts of the dialectical third and the interactional field. The history and politics of the translation of analytic writing and their consequences for the lingua franca of analysis are discussed. Key themes within the correspondence are outlined, including Jung and Neumann's pre-war exploration of Judaism and the unconscious, the post-war difficulties around the publication of Neumann's Depth Psychology and a New Ethic set against the early years of the C.G. Jung Institute in Zurich, and the development of the correspondents' relationship over time. PMID:27000693

  20. ON THE \\overline{\\partial}-NEUMANN PROBLEM FOR SMOOTH FUNCTIONS AND DISTRIBUTIONS

    NASA Astrophysics Data System (ADS)

    Kytmanov, A. M.

    1991-02-01

    We consider the following \\overline{\\partial}-Neumann problem for functions: given a function \\varphi on the boundary of a domain D\\subset\\mathbf{C}^n with boundary of class C^\\infty, find a harmonic function F in D such that \\overline{\\partial}_nF=\\varphi on \\partial D (where \\overline{\\partial}_nF is the normal part of the differential form \\overline{\\partial} F). It is shown that with the homogeneous boundary condition \\overline{\\partial}_nF=0, the only solutions of this problem are holomorphic functions. Solvability of this problem is proved in strictly pseudoconvex domains if the function (or distribution) \\varphi is orthogonal to holomorphic functions f for integration over \\partial D. An integral formula for the solution of the \\overline{\\partial}-Neumann problem in the ball is given. The proof uses known results on solvability of the \\overline{\\partial}-Neumann problem for forms of type (p,\\,q) for q>0.

  1. Imposing Neumann boundary condition on cosmological perturbation equations and trajectories of particles

    NASA Astrophysics Data System (ADS)

    Shenavar, Hossein

    2016-03-01

    We impose Neumann boundary condition to solve cosmological perturbation equations and we derive a modified Friedmann equation and a new lensing equation. To check the new lensing equation and the value of Neumann constant, a sample that contains ten strong lensing systems is surveyed. Except for one lens, masses of the other lenses are found to be within the constrains of the observational data. Furthermore, we argue that by using the concept of geometrodynamic clocks it is possible to modify the equation of motion of massive particles too. Also, a sample that includes 101 HSB and LSB galaxies is used to re-estimate the value of the Neumann constant and we found that this value is consistent with the prior evaluation from Friedmann and lensing equations. Finally, the growth of structure is studied by a Newtonian approach which resulted in a more rapid rate of the structure formation in matter dominated era.

  2. Conjugate quasilinear Dirichlet and Neumann problems and a posteriori error bounds

    NASA Technical Reports Server (NTRS)

    Lavery, J. E.

    1976-01-01

    Quasilinear Dirichlet and Neumann problems on a rectangle D with boundary D prime are considered. Using these concepts, conjugate problems, that is, a pair of one Dirichlet and one Neumann problem, the minima of the energies of which add to zero, are introduced. From the concept of conjugate problems, two-sided bounds for the energy of the exact solution of any given Dirichlet or Neumann problem are constructed. These two-sided bounds for the energy at the exact solution are in turn used to obtain a posteriori error bounds for the norm of the difference of the approximate and exact solutions of the problem. These bounds do not involve the unknown exact solution and are easily constructed numerically.

  3. Standing in the gap: ref lections on translating the Jung-Neumann correspondence.

    PubMed

    McCartney, Heather

    2016-04-01

    This paper considers the experience of translating the correspondence between C.G. Jung and Erich Neumann as part of the Philemon series. The translator explores the similarities between analytical work and the task of translation by means of the concepts of the dialectical third and the interactional field. The history and politics of the translation of analytic writing and their consequences for the lingua franca of analysis are discussed. Key themes within the correspondence are outlined, including Jung and Neumann's pre-war exploration of Judaism and the unconscious, the post-war difficulties around the publication of Neumann's Depth Psychology and a New Ethic set against the early years of the C.G. Jung Institute in Zurich, and the development of the correspondents' relationship over time.

  4. A straight quantum wave guide with mixed Dirichlet and Neumann boundary conditions in uniform magnetic fields

    NASA Astrophysics Data System (ADS)

    Olendski, O.; Mikhailovska, L.

    2007-04-01

    A straight quasi-one-dimensional Dirichlet wave guide with a Neumann window of length L on one or two confining surfaces is considered theoretically with and without perpendicular homogeneous magnetic field \\bf B . It is shown that for the field-free case, a bound state in the continuum (BIC) for one Neumann window exists for some critical lengths only, while for the two Neumann segments symmetrically located on the opposite walls, due to the restored transverse symmetry of the system, BICs exist for the arbitrary L. Bound states lying below the fundamental propagation threshold of the Dirichlet strip survive any strength of the uniform magnetic field and do not depend on its direction. Moreover, an increasing field induces new bound states regularly arranged with the levels present at B = 0. For two Neumann windows, strong magnetic fields lead to the degeneracy of the adjacent odd and even bound states with their energies almost equal to each other and to their corresponding counterpart for one Neumann segment, which is explained by mapping the problem onto the field-free one or two purely attractive one-dimensional quantum wells with field-dependent depth. Miscellaneous magnetotransport characteristics of the structures are also considered; in particular, it is demonstrated that small fields applied to the channel with two Neumann windows destroy BICs by coupling them to the continuum states. This is manifested in the conductance-Fermi energy dependence by Fano resonances. Currents flowing in the wave guide are investigated too, and it is shown that current density patterns near the resonances form vortices which change their chirality as energy sweeps through the resonant region. Generalizations to any other arbitrary combination of the boundary conditions are provided. Comparison with other structures such as window-coupled Dirichlet wave guides, a bent strip or straight Dirichlet channel with electrostatic impurity inside, is performed.

  5. John Nash, game theory, and the schizophrenic brain.

    PubMed

    Capps, Donald

    2011-03-01

    This article focuses on John Nash, recipient of the Nobel Prize in Economics in 1994, and subject of the Award winning 2001 film A Beautiful Mind, who was diagnosed with paranoid schizophrenia in 1958 at the age of 29. After presenting an account of the emergence, course, and eventual remission of his illness, the article argues for the relevance of his contribution to game theory, known as the Nash equilibrium, for which he received the Nobel Prize, to research studies of the schizophrenic brain and how it deviates from the normal brain. The case is made that the Nash equilibrium is descriptive of the normal brain, whereas the game theory formulated by John van Neumann, which Nash's theory challenges, is descriptive of the schizophrenic brain. The fact that Nash and his colleagues in mathematics did not make the association between his contributions to mathematics and his mental breakdown and that his later recovery exemplified the validity of this contribution are noted and discussed. Religious themes in his delusional system, including his view of himself as a secret messianic figure and the biblical Esau, are interpreted in light of these competing game theories and the dysfunctions of the schizophrenic brain. His recognition that his return to normalcy came at the price of his sense of being in relation to the cosmos is also noted.

  6. A finite element algorithm for high-lying eigenvalues with Neumann and Dirichlet boundary conditions

    NASA Astrophysics Data System (ADS)

    Báez, G.; Méndez-Sánchez, R. A.; Leyvraz, F.; Seligman, T. H.

    2014-01-01

    We present a finite element algorithm that computes eigenvalues and eigenfunctions of the Laplace operator for two-dimensional problems with homogeneous Neumann or Dirichlet boundary conditions, or combinations of either for different parts of the boundary. We use an inverse power plus Gauss-Seidel algorithm to solve the generalized eigenvalue problem. For Neumann boundary conditions the method is much more efficient than the equivalent finite difference algorithm. We checked the algorithm by comparing the cumulative level density of the spectrum obtained numerically with the theoretical prediction given by the Weyl formula. We found a systematic deviation due to the discretization, not to the algorithm itself.

  7. Carl Neumann versus Rudolf Clausius on the propagation of electrodynamic potentials

    NASA Astrophysics Data System (ADS)

    Archibald, Thomas

    1986-09-01

    In the late 1860's, German electromagnetic theorists employing W. Weber's velocity-dependent force law were forced to confront the issue of energy conservation. One attempt to formulate a conservation law for such forces was due to Carl Neumann, who introduced a model employing retarded potentials in 1868. Rudolf Clausius quickly pointed out certain problems with the physical interpretation of Neumann's mathematical formalism. The debate between the two men continued until the 1880's and illustrates the strictures facing mathematical approaches to physical problems during this prerelativistic, pre-Maxwellian period.

  8. John Campbell Begg

    NASA Astrophysics Data System (ADS)

    Campbell, Robert

    2002-03-01

    John Campbell Begg born in Dunedin in 1876 was the son of Alexander Campbell Begg and Katherine Begg, early Otago settlers. He studied physics and philosophy at the University of Otago before turning to business and rural pursuits. He died in Dunedin in 1965 age 89. The Begg family were foundation members of the Otago Astronomical Society. Visits to the Tanna Hill Observatory were made in 1915. The astronomical observatory which stands in Robin Hood Park, Roslyn, Dunedin bears his name; Beverly Begg Observatory

  9. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (left) and Fred W. Kelley examine a ST-100 Stellar Instrument Platform in the astrionics lab. Dr. Von Braun, then deputy associate administrator for planning, NASA, was visiting on the anniversary of the establishment of the Marshall Space Flight Center.

  10. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Dr. Wernher Von Braun, stands in front of a Saturn IB Launch Vehicle at Kennedy Space Center (KSC). Dr. Von Braun was Marshall's first Center Director (1960-1970). Under his leadership Marshall was responsible for the development of the Saturn rockets, the Skylab project and getting the United States into Space and landing on the moon with the Apollo missions.

  11. Dr. Wernher von Braun

    NASA Technical Reports Server (NTRS)

    2004-01-01

    Dr. von Braun is looking out from a 10th floor window of building 4200 at the Marshall Space Flight Center (MSFC). He was the first Center Director and served as the Director from July 1960 through February 1970. Following World War II, Dr. von Braun and his German colleagues arrived in the United States under the Project Paperclip (American acquisition of German rocket experts) to continue their rocket development work. In 1950, von Braun and his German Rocket Team (also called the Peenemuende Team) were transferred from Ft. Bliss, Texas to Huntsville, Alabama to work for the Army's rocket program at Redstone Arsenal and later, NASA's Marshall Space Flight Center (MSFC). Under Dr. von Braun's leadership, MSFC developed the Saturn V launch vehicle, which placed the first men, two American astronauts, on the Moon. Wernher von Braun's life was dedicated to expanding man's knowledge through the exploration of space.

  12. The p-Dirichlet-to-Neumann operator with applications to elliptic and parabolic problems

    NASA Astrophysics Data System (ADS)

    Hauer, Daniel

    2015-10-01

    In this paper, we investigate the Dirichlet-to-Neumann operator associated with second order quasi-linear operators of p-Laplace type for 1 < p < ∞, which acts on the boundary of a bounded Lipschitz domain in Rd for d ≥ 2. We establish well-posedness and Hölder-continuity with uniform estimates of weak solutions of some elliptic boundary-value problems involving the Dirichlet-to-Neumann operator. By employing these regularity results of weak solutions of elliptic problems, we show that the semigroup generated by the negative Dirichlet-to-Neumann operator on Lq enjoys an Lq -C 0, α-smoothing effect and the negative Dirichlet-to-Neumann operator on the set of continuous functions on the boundary of the domain generates a strongly continuous and order-preserving semigroup. Moreover, we establish convergence in large time with decay rates of all trajectories of the semigroup, and in the singular case (1 + ε) ∨ 2 d/d + 2 ≤/p < 2 for some ε > 0, we give upper estimates of the finite time of extinction.

  13. The challenges of editorship: a reflection on editing the Jung-Neumann correspondence.

    PubMed

    Liebscher, Martin

    2016-04-01

    The complete correspondence between C.G. Jung and Erich Neumann was published in 2015. This article attempts to provide insight into the practical task, as well as the theoretical background, of the editing process. The advantages and possibilities of an unabridged edition with an extensive historical contextualization are demonstrated, and compared to the approach of the editors of the Jung Letters and their selection therein of Jung's letters to Neumann. The practical points under consideration include the establishment of the letter corpus, the ascertainment of dates and the chronological arrangement of the letter exchange, as well as the deciphering of handwritten letters. Theoretical aspects under discussion involve the question of the merits of a critical contextualisation and the position of the editor vis-à-vis the research object. The example of the selecting and editing of Jung's letters to Neumann by Aniela Jaffé and Gerhard Adler reveals how drastically the close ties of those editors with Jung, Neumann, and members of the Zurich analytical circles compromised their editorial work at times. The advantage for an editor being able to work from an historical distance is appreciated. PMID:27000692

  14. On stability of difference schemes for hyperbolic multipoint NBVP with Neumann conditions

    NASA Astrophysics Data System (ADS)

    Yildirim, Ozgur; Uzun, Meltem

    2016-08-01

    In this work, a multipoint nonlocal boundary value problem (NBVP) for hyperbolic equations with Neumann conditions is considered. Third and fourth order of accuracy stable difference schemes for solving this problem are presented. Efficiency of these schemes are tested via MATLAB implementation.

  15. Paulo Freire and the Politics of Education: A Response to Neumann

    ERIC Educational Resources Information Center

    Roberts, Peter

    2016-01-01

    Jacob Neumann provides a thoughtful reading of "Paulo Freire in the 21st century: Education, dialogue, and transformation" [v48 n6 p634-644 2016]. His comments on the importance of contextualising Freire's work and the value of openness in engaging Freirean ideas are insightful and helpful. His use of the term "apolitical" is,…

  16. PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Neumann Boundary Conditions Inhibiting SSB in Coleman—Weinberg Mechanism

    NASA Astrophysics Data System (ADS)

    F. N., Fagundes; R. O., Francisco; B. B., Dilem; J. A., Nogueira

    2010-12-01

    In this work we show that homogeneous Neumann boundary conditions inhibit the Coleman—Weinberg mechanism for spontaneous symmetry breaking in the scalar electrodynamics if the length of the finite region is small enough (a = e2 M-1varphi, where Mvarphi is the mass of the scalar field generated by the Coleman—Weinberg mechanism).

  17. The challenges of editorship: a reflection on editing the Jung-Neumann correspondence.

    PubMed

    Liebscher, Martin

    2016-04-01

    The complete correspondence between C.G. Jung and Erich Neumann was published in 2015. This article attempts to provide insight into the practical task, as well as the theoretical background, of the editing process. The advantages and possibilities of an unabridged edition with an extensive historical contextualization are demonstrated, and compared to the approach of the editors of the Jung Letters and their selection therein of Jung's letters to Neumann. The practical points under consideration include the establishment of the letter corpus, the ascertainment of dates and the chronological arrangement of the letter exchange, as well as the deciphering of handwritten letters. Theoretical aspects under discussion involve the question of the merits of a critical contextualisation and the position of the editor vis-à-vis the research object. The example of the selecting and editing of Jung's letters to Neumann by Aniela Jaffé and Gerhard Adler reveals how drastically the close ties of those editors with Jung, Neumann, and members of the Zurich analytical circles compromised their editorial work at times. The advantage for an editor being able to work from an historical distance is appreciated.

  18. Marcel Breuer at Saint John's

    ERIC Educational Resources Information Center

    Carlson, Scott

    2008-01-01

    A visitor to Saint John's University and Saint John's Abbey, in north-central Minnesota, sees something of Gothic heritage while standing in front of the abbey church, designed and built around 1960. The church's 112-foot campanile--a trapezoidal slab made of 2,500 tons of steel and concrete--stands boldly in front of a huge concrete honeycomb…

  19. John Bartlett and bioterrorism.

    PubMed

    Henderson, D A

    2014-09-15

    Until 1997, the subject of bioterrorism was not discussed within the medical community and deliberately ignored in national planning efforts. Biological weapons were regarded as "morally repulsive." This complacency stemmed from a 1972 Biological Weapons Convention where all countries agreed to cease offensive biological weapons research. In the 1990s, however, the Soviet Union was discovered to have an extensive bioweapons program and a Japanese religious cult sought to launch an anthrax attack on Tokyo. Biological weapons such as smallpox and anthrax had the potential to cause a national catastrophe. However, little was done until John Bartlett in 1997 led a symposium and program to educate the medical community and the country of the need for definitive bioweapons programs. It was highly persuasive and received a final stimulus when the anthrax attack occurred in the United States in 2001.

  20. JOHN MUIR WILDERNESS, CALIFORNIA.

    USGS Publications Warehouse

    Dellinger, David A.; Johnson, Frederick L.

    1984-01-01

    The mineral survey of the John Muir Wilderness, California revealed eight areas of probable and substantiated potential for the occurrence of mineral resources. Tungsten, with accompanying resources of gold, copper, silver, and molybdenum, is found along contacts between granitic rocks and metamorphosed calcareous sedimentary rocks; it is estimated that more than 1 million tons of demonstrated tungsten resources exist in areas of sustantiated resource potential within the wilderness. Resources of gold, silver, lead, copper, zinc, molydenum, and cobalt, occur in small deposits not associated with tungsten; however, the known deposits of these commodities are small and the possibility of the occurrence of larger ones is unlikely. The geologic setting precludes the presence of fossil fuel resources.

  1. John Bartlett and bioterrorism.

    PubMed

    Henderson, D A

    2014-09-15

    Until 1997, the subject of bioterrorism was not discussed within the medical community and deliberately ignored in national planning efforts. Biological weapons were regarded as "morally repulsive." This complacency stemmed from a 1972 Biological Weapons Convention where all countries agreed to cease offensive biological weapons research. In the 1990s, however, the Soviet Union was discovered to have an extensive bioweapons program and a Japanese religious cult sought to launch an anthrax attack on Tokyo. Biological weapons such as smallpox and anthrax had the potential to cause a national catastrophe. However, little was done until John Bartlett in 1997 led a symposium and program to educate the medical community and the country of the need for definitive bioweapons programs. It was highly persuasive and received a final stimulus when the anthrax attack occurred in the United States in 2001. PMID:25151482

  2. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (right), Deputy Associate Administrator for planning, National Aeronautics and Space Administration, inspects the mockup of the Saturn Workshop during a visit marking the 10th anniversary of the Marshall Center. Shown with Dr. Von Braun, from left to right, are Karl Heimburg, Director of the astronautics lab; Herman K. Weidner, Director of Science and Engineering, and George Hardy of the Astronautics lab.

  3. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (right), Deputy Associate Administrator for Planning, National Aeronautics and Space Administration, inspects the mockup of the Saturn Workshop during a visit marking the 10th anniversary of the Marshall Center. Shown with Dr. Von Braun, from left to right, are Karl Heimburg, Director of the Astronautics Lab; Herman K. Weidner, Director of Science and Engineering, and George Hardy of the Astronautics Lab.

  4. John M. Eisenberg, MD.

    PubMed

    Eisenberg, J M

    1995-08-01

    The complicated interaction between government, academic medical centers, health care payers, and burgeoning market forces has tested the leadership skills of a generation of academicians with little formal training in economics. The emergence of a new breed of physician investigator with solid business credentials has therefore proved attractive to many segments of the medical community. John M. Eisenberg received his MD from Washington University in 1972, his MBA from the Wharton School in 1976, and shortly thereafter headed the division of general internal medicine at the University of Pennsylvania. In addition to championing the role of the generalist in health care delivery, Eisenberg has also played a major part in the reformation of Medicare reimbursement. He has been a commissioner on the Congressional Physician Payment Review Commission since 1986, serving as chairman since 1993. After assuming the chairmanship of the department of medicine at Georgetown University in 1992, Eisenberg served as an advisor to the Clinton administration during its efforts towards national health care reform. Interviewed in his office in Georgetown, Eisenberg reflected on the economic forces twisting post-graduate medical education, the role of non-physician providers in future health care delivery, and the evolving relationship between specialists and generalists. PMID:7552581

  5. Searching for John Goodricke

    NASA Astrophysics Data System (ADS)

    French, Linda M.

    2010-01-01

    John Goodricke (1764-1786) is one of the most intriguing and enigmatic figures in the history of astronomy. Deaf from the age of five, his observations of the light variation of Algol brought him acclaim and the Copley Medal of the Royal Society by the age of nineteen. Together with his neighbor, mentor, and distant relative Edward Pigott, he went on to discover and quantify the light variations of other stars, including Delta Cephei. Goodricke's careful accounts of his observations, and their accuracy, remain a model of clear scientific thinking and reporting. Goodricke's career was short, as was his time on Earth: he died before his 22nd birthday. He left few personal notes or letters, and even many basic circumstances of his life have been misunderstood or misinterpreted. I will discuss Goodricke's apparent change of mind regarding the variations of Algol. I will further describe recent research into his family circumstances and into the allegation advanced by Zdenek Kopal in the 1980s that Goodricke was buried apart from his family because they were ashamed of his deafness.

  6. A High-Order Direct Solver for Helmholtz Equations with Neumann Boundary Conditions

    NASA Technical Reports Server (NTRS)

    Sun, Xian-He; Zhuang, Yu

    1997-01-01

    In this study, a compact finite-difference discretization is first developed for Helmholtz equations on rectangular domains. Special treatments are then introduced for Neumann and Neumann-Dirichlet boundary conditions to achieve accuracy and separability. Finally, a Fast Fourier Transform (FFT) based technique is used to yield a fast direct solver. Analytical and experimental results show this newly proposed solver is comparable to the conventional second-order elliptic solver when accuracy is not a primary concern, and is significantly faster than that of the conventional solver if a highly accurate solution is required. In addition, this newly proposed fourth order Helmholtz solver is parallel in nature. It is readily available for parallel and distributed computers. The compact scheme introduced in this study is likely extendible for sixth-order accurate algorithms and for more general elliptic equations.

  7. John Dewey on Physics Teaching.

    ERIC Educational Resources Information Center

    Moyer, Albert E.

    1982-01-01

    Comments on the significance of a brief 1909 article on physics instruction written by John Dewey for the "Symposium on the Purpose and Organization of Physics Teaching in Secondary Schools." Includes the article itself. (SK)

  8. Magic moments with John Bell

    SciTech Connect

    Bertlmann, Reinhold A.

    2015-07-15

    John Bell, with whom I had a fruitful collaboration and warm friendship, is best known for his seminal work on the foundations of quantum physics, but he also made outstanding contributions to particle physics and accelerator physics.

  9. John Hunter and venereal disease.

    PubMed Central

    Wright, D. J.

    1981-01-01

    John Hunter's contribution to the understanding of venereal disease is reviewed. Hunter's evidence for the unitary nature of these diseases is examined and the advances he made in diagnosis, pathology, and management are considered. PMID:7018353

  10. A boundary integral algorithm for the Laplace Dirichlet-Neumann mixed eigenvalue problem

    NASA Astrophysics Data System (ADS)

    Akhmetgaliyev, Eldar; Bruno, Oscar P.; Nigam, Nilima

    2015-10-01

    We present a novel integral-equation algorithm for evaluation of Zaremba eigenvalues and eigenfunctions, that is, eigenvalues and eigenfunctions of the Laplace operator with mixed Dirichlet-Neumann boundary conditions; of course, (slight modifications of) our algorithms are also applicable to the pure Dirichlet and Neumann eigenproblems. Expressing the eigenfunctions by means of an ansatz based on the single layer boundary operator, the Zaremba eigenproblem is transformed into a nonlinear equation for the eigenvalue μ. For smooth domains the singular structure at Dirichlet-Neumann junctions is incorporated as part of our corresponding numerical algorithm-which otherwise relies on use of the cosine change of variables, trigonometric polynomials and, to avoid the Gibbs phenomenon that would arise from the solution singularities, the Fourier Continuation method (FC). The resulting numerical algorithm converges with high order accuracy without recourse to use of meshes finer than those resulting from the cosine transformation. For non-smooth (Lipschitz) domains, in turn, an alternative algorithm is presented which achieves high-order accuracy on the basis of graded meshes. In either case, smooth or Lipschitz boundary, eigenvalues are evaluated by searching for zero minimal singular values of a suitably stabilized discrete version of the single layer operator mentioned above. (The stabilization technique is used to enable robust non-local zero searches.) The resulting methods, which are fast and highly accurate for high- and low-frequencies alike, can solve extremely challenging two-dimensional Dirichlet, Neumann and Zaremba eigenproblems with high accuracies in short computing times-enabling, in particular, evaluation of thousands of eigenvalues and corresponding eigenfunctions for a given smooth or non-smooth geometry with nearly full double-precision accuracy.

  11. Asymptotics at infinity of solutions to the Neumann problem in a sieve-type layer

    NASA Astrophysics Data System (ADS)

    Nazarov, Sergueı̈ A.; Thäter, Gudrun

    2003-01-01

    The Neumann problem is considered in a domain Ω, which can differ from a periodic layer inside a compact set. We prove the Fredholm property of the corresponding operator in step-weighted Sobolev spaces and determine its kernel and cokernel. All these results are based on the obtained asymptotic representation of solutions at infinity. To cite this article: S.A. Nazarov, G. Thäter, C. R. Mecanique 331 (2003).

  12. On the Effects of the Neumann Boundary Conditions in the Coleman-Weinberg Mechanism

    NASA Astrophysics Data System (ADS)

    Fagundes, F. N.; Oakes, T. L. Antonacci; Dilem, B. B.; Nogueira, J. A.

    We investigate the effects of the homogeneous Neumann boundary conditions in the scalar electrodynamics with self-interaction. We show that if the length of the finite region is small enough (a = e2M-1φ , where Mϕ is the mass of the scalar field generated by the Coleman-Weinberg mechanism) the spontaneous symmetry breaking will not be induced and the vector field will not develop mass, however the scalar field will.

  13. John Locke on Personal Identity**

    PubMed Central

    Nimbalkar, Namita

    2011-01-01

    John Locke speaks of personal identity and survival of consciousness after death. A criterion of personal identity through time is given. Such a criterion specifies, insofar as that is possible, the necessary and sufficient conditions for the survival of persons. John Locke holds that personal identity is a matter of psychological continuity. He considered personal identity (or the self) to be founded on consciousness (viz. memory), and not on the substance of either the soul or the body. PMID:21694978

  14. John locke on personal identity.

    PubMed

    Nimbalkar, Namita

    2011-01-01

    John Locke speaks of personal identity and survival of consciousness after death. A criterion of personal identity through time is given. Such a criterion specifies, insofar as that is possible, the necessary and sufficient conditions for the survival of persons. John Locke holds that personal identity is a matter of psychological continuity. He considered personal identity (or the self) to be founded on consciousness (viz. memory), and not on the substance of either the soul or the body.

  15. Stability estimate for the aligned magnetic field in a periodic quantum waveguide from Dirichlet-to-Neumann map

    NASA Astrophysics Data System (ADS)

    Mejri, Youssef

    2016-06-01

    In this article, we study the boundary inverse problem of determining the aligned magnetic field appearing in the magnetic Schrödinger equation in a periodic quantum cylindrical waveguide, by knowledge of the Dirichlet-to-Neumann map. We prove a Hölder stability estimate with respect to the Dirichlet-to-Neumann map, by means of the geometrical optics solutions of the magnetic Schrödinger equation.

  16. Relation between the Negative-Order Harry Dym Hierarchy and a Family of Backward Neumann Type Systems

    NASA Astrophysics Data System (ADS)

    Chen, Jinbing

    2016-03-01

    From the bidirectional Lenard gradients, the negative-order Harry Dym (nHD) hierarchy is retrieved and further embedded into a bi-Hamiltonian structure displaying integrability. It follows from Neumann type integrable reduction that the nHD hierarchy is reduced to a family of backward Neumann type systems, which separate the temporal and spatial variables on the tangent bundle of an ellipsoid. Backward Neumann type systems are then proved to be completely integrable in the Liouville sense. From the commutativity of backward Neumann type flows, the relation between the nHD hierarchy and backward Neumann type systems is specified, where the involutive solutions of backward Neumann type systems yield the finite parametric solutions of the nHD hierarchy. Moreover, we propose the concept of a negative-order Novikov equation that cuts out a finite-dimensional invariant subspace for a negative-order integrable system, which paves an alternative way to obtain explicit solutions of negative-order integrable nonlinear evolution equations.

  17. The correspondence between Erich Neumann and C.G. Jung on the occasion of the November, progroms 1938 [corrected].

    PubMed

    Löwe, Angelica

    2015-06-01

    In the light of recently-published correspondence between Jung and Neumann, this paper considers and connects two aspects of their relationship: Jung's theory of an ethno-specific differentiation of the unconscious as formulated in 1934, and the relationship between Jung and Neumann at the beginning of the Holocaust in 1938-with Jung as the wise old man and a father figure on one hand, and Neumann as the apprentice and dependent son on the other. In examining these two issues, a detailed interpretation of four letters, two by Neumann and two by Jung, written in 1938 and 1939, is given. Neumann's reflections on the collective Jewish determination in the face of the November pogroms in 1938 led Jung to modify his view, with relativization and secularization of his former position. This shift precipitated a deep crisis with feelings of disorientation and desertion in Neumann; the paper discusses how a negative father complex was then constellated and imaged in a dream. After years of silence, the two men were able to renew the deep bonds that characterized their lifelong friendship.

  18. Programmierung von Werkzeugmaschinen

    NASA Astrophysics Data System (ADS)

    Ahrberg, Rainer; Barfels, Lutz; Voss, Jürgen

    In den 1950-er Jahren wurde am Bostoner MIT (Massachusetts Institute of Technology) die Grundlage der modernen CNC-Technik gelegt. Für die spanende Herstellung von Rotorprofilen für Hubschrauber auf Basis vorab berechneter Konturverläufe wurden erstmalig Steuerungen auf Basis diskreter elektronischer Bauelemente entwickelt. Mit der Einführung integrierter elektronischer Schaltkreise (ICs) begann diese Technologie schrittweise Einzug in die Werkzeugmaschinenindustrie zu halten. Neben der Entwicklung der Hardware wurde die Programmierung und die Entwicklung von entsprechenden Programmiersprachen ein für die Akzeptanz dieser Technologie entscheidende Größe.

  19. Dr. John Richardson: Arctic Doctor

    PubMed Central

    Houston, C. Stuart

    1988-01-01

    Dr. John Richardson was foremost among a special breed of men, the surgeon-naturalists, one of whom accompanied every exploration party sent out by Great Britain. In addition to performing medical duties, the surgeon-naturalist was expected to identify and collect specimens of plants, animals, and rocks. Dr. Richardson was a member of two of the arctic expeditions led by Sir John Franklin, and participated in the search for the long-overdue third Franklin expedition. ImagesFigure 1 PMID:21253036

  20. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    A camerman catches Dr. Wernher Von Braun, Director of the Marshall Space Flight Center, his son, Peter, and daughter, Martgrit, as they arrive at the employee picnic held to celebrate man's first landing on the moon 6 days earlier. In the foreground is David R. Newby, Director of Administration and Technical Services at the Marshall Space Flight Center.

  1. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Shown viewing the Apollo telescope mockup are, from left to right, Charles Donlan, deputy associate administrator for manned space flight; Dr. Wernher Von Braun, Marshall Space Flight Center director; William Horton, astrionics lab; Dr. Thomas Paine, NASA deputy administrator; Warner Kuers, director of the ME lab.

  2. Analytik von Lebensmittelallergenen

    NASA Astrophysics Data System (ADS)

    Demmel, Anja; Hahn, Alexandra

    Ansonsten harmlose Lebensmittel oder deren Bestandteile können bei von Lebensmittelallergien betroffenen Personen Überempfindlichkeitsreaktionen auslösen. Hierbei kann es sich um immunvermittelte Lebensmittelallergien oder um Intoleranzen gegenüber bestimmten Lebensmittelbestandteilen handeln. Ein Beispiel für Letzteres ist die Laktoseintoleranz, welche durch einen Enzymdefekt hervorgerufen wird [1]. Im Gegensatz hierzu handelt es sich bei Lebensmittelallergien um Sofortreaktionen, die durch IgE-Antikörper gegen Antigene aus den Lebensmitteln hervorgerufen werden und zu verschiedenen körperlichen Beschwerden führen können. Bei den Antigenen, welche von den von Allergikern produzierten IgE-Antikörpern erkannt werden, handelt es sich vor allem um Proteine [2]. Symptome IgE-vermittelter Reaktionen können zum Beispiel Hautausschlag, eine Schwellung der Schleimhäute oder das sogenannte orale Allergiesyndrom mit allergischen Reaktionen an der Mundschleimhaut und im Magen-Darm-Trakt sein [3]. Die hierbei auftretenden Beschwerden reichen von einem Brennen im Mund und einer Schwellung der Lippen und der Zunge bis zu Atemnot verursachenden Schwellungen im Kehlkopfbereich. In besonders schlimmen Fällen können allergische Reaktionen zu einem anaphylaktischen Schock und zum Tod durch Kreislaufversagen führen [4]. Während klassische Nahrungsallergene häufig komplexe Reaktionen zur Folge haben, ist bei Pollen-assoziierten Nahrungsmittelallergien das orale Allergiesyndrom vorherrschend.

  3. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Marshall Space Flight Center director Wernher Von Braun and his family were honored with a series of events prior to his relocation to Washington, D.C. where he was assigned duties at NASA headquarters as deputy associate administrator for planning. Here he is shown with General Richard Drury and Hazel Toftoy, widow of General H.N. Toftoy.

  4. Energetische Verwertung von Biomasse

    NASA Astrophysics Data System (ADS)

    Zahoransky, Richard; Allelein, Hans-Josef; Bollin, Elmar; Oehler, Helmut; Schelling, Udo

    Etwa 0,1% der Solarenergie wandeln sich durch Photosynthese aus dem Kohlendioxid der Luft in Biomasse um. Die Biomassen sind als Festbrennstoff nutzbar oder zu gasförmigen Brennstoffen weiterverarbeitbar. Zwei Arten von Biomassen sind zu unterscheiden: Anfallende Biomasse

  5. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Dr. Wernher von Braun, Director of the Marshall Space Flight Center, explains the purpose of a thermal curtain in the mockup of a Saturn I workshop to U.S. Representative Armistead Seldon of Alabama. The Congressman visited the Marshall Center on March 2, 1968 to tour the workshop and to visit Marshall Center facilities.

  6. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1968-01-01

    U.S. Representative Armistead Seldon (D.-Al) inspects the food preparation area of the Saturn I workshop mockup during a visit to the Marshall Space Flight Center. Explaining the operation of the food preparation area to the congressman is Dr. Wernher Von Braun, Marshall Space Flight Center director.

  7. Female first marriage in East and Southeast Asia: a Kiefer-Neumann model.

    PubMed

    Montgomery, M R; Sulak, D B

    1989-04-01

    Many studies have shown that schooling levels of husband and wife are important determinants of household behavior in developing countries. This article asks how the schooling levels of husband and wife come to be associated with each other through the marriage market. The Kiefer-Neumann model of labor market search is adapted to marital search, the aim being to explain both the positive sorting on educational levels for spouses, and the positive relationship between female schooling and age at 1st marriage. World Fertility Survey data for Indonesia, Korea, and Malaysia are employed in the analyses.

  8. A forced fractional Schrödinger equation with a Neumann boundary condition

    NASA Astrophysics Data System (ADS)

    Esquivel, L.; Kaikina, Elena I.

    2016-07-01

    We study the initial-boundary value problem for the nonlinear fractional Schrödinger equation {ut+i(uxx+12π∫0∞sign(x-y)|x-y|12uy( y)dy)+i|u|2u=0, t>0, x>0u(x,0)=u0(x), x>0,ux(0,t)=h(t), t>0. We prove the global-in-time existence of solutions for a nonlinear fractional Schrödinger equation with inhomogeneous Neumann boundary conditions. We are also interested in the study of the asymptotic behaviour of the solutions.

  9. Transient spatio-temporal dynamics of a diffusive plant-herbivore system with Neumann boundary conditions.

    PubMed

    Yu, Fang; Wang, Lin; Watmough, James

    2016-12-01

    In many existing predator-prey or plant-herbivore models, the numerical response is assumed to be proportional to the functional response. In this paper, without such an assumption, we consider a diffusive plant-herbivore system with Neumann boundary conditions. Besides stability of spatially homogeneous steady states, we also derive conditions for the occurrence of Hopf bifurcation and steady-state bifurcation and provide geometrical methods to locate the bifurcation values. We numerically explore the complex transient spatio-temporal behaviours induced by these bifurcations. A large variety of different types of transient behaviours including oscillations in one or both of space and time are observed. PMID:27572052

  10. Redescription of Amblyomma fuscum Neumann, 1907 (Acari: Ixodidae), a rare South America tick confirmed in Brazil.

    PubMed

    Barros-Battesti, Darci M; Onofrio, Valeria C; Labruna, Marcelo B; Martins, João R; Guglielmone, Alberto A

    2005-06-01

    The species Amblyomma fuscum Neumann, 1907 is a rare tick found on the Neotropical Region, but it has not been recorded as a valid taxon in some lists proposed by current taxonomists. After a comparison between the Brazilian material of A. fuscum deposited in the Acari Collection of the Butantan Institute, São Paulo, Brazil, and the male type deposited in Leiden Museum of Natural History, The Netherlands, we confirm the taxonomic validity of A. fuscum and redescribe the adult specimens based on light and scanning electron microscope studies.

  11. A forced fractional Schrödinger equation with a Neumann boundary condition

    NASA Astrophysics Data System (ADS)

    Esquivel, L.; Kaikina, Elena I.

    2016-07-01

    We study the initial-boundary value problem for the nonlinear fractional Schrödinger equation {ut+i(uxx+12π∫0∞sign(x‑y)|x‑y|12uy( y)dy)+i|u|2u=0, t>0, x>0u(x,0)=u0(x), x>0,ux(0,t)=h(t), t>0. We prove the global-in-time existence of solutions for a nonlinear fractional Schrödinger equation with inhomogeneous Neumann boundary conditions. We are also interested in the study of the asymptotic behaviour of the solutions.

  12. John Milton: A Research Guide.

    ERIC Educational Resources Information Center

    Van Noate, Judith, Comp.

    This handout is a guide to library resources in the J. Murrey Atkins Library at the University of North Carolina-Charlotte, for sources of criticism for the study of 17th-century British author John Milton. The guide is intended to help readers find critical and biographical information on Milton. It explains important reference sources in the…

  13. The Johns Hopkins Hospital Network

    PubMed Central

    Tolchin, Stephen G.; Barta, Wendy; Harkness, Kenneth

    1985-01-01

    The Johns Hopkins Hospital has initiated an ambitious program to apply modern technologies to the development of a new, comprehensive clinical information system. One component of this system is a networking technology for supporting the integration of diverse and functionally distinct information systems. This paper discusses the selection of the networking technology implemented at JHH, issues and problems, networking concepts, protocols and reliability.

  14. John Milton Oskison and Assimilation

    ERIC Educational Resources Information Center

    Larre, Lionel

    2013-01-01

    John Milton Oskison (1874-1947) was a Cherokee writer, journalist, and activist and the author of novels and biographies as well as numerous short stories, essays, and articles about a great variety of subjects. Oskison thought of himself as "an interpreter to the world, of the modern, progressive Indian." The kind of representation Oskison gave…

  15. John James Audubon & the Turkey

    ERIC Educational Resources Information Center

    Hinshaw, Craig

    2012-01-01

    In the first half of the 1800s, John James Audubon roamed the wilds of America attempting to draw all the birds in their natural habitat. He published his life-sized paintings in a huge book entitled "Birds of America." Audubon developed a unique system of depicting the birds in natural poses, such as flying. After shooting the bird, he would wire…

  16. John Sawhill: Academe's Crisis Manager.

    ERIC Educational Resources Information Center

    Chernow, Ron

    1979-01-01

    John C. Sawhill became president of New York University (NYU) and balanced its budget in a year. His administration of the university, his personality, NYU's financial situation and the subsequent reforms, fund raising, faculty morale and governance, and efforts to improve the university's academic reputation are discussed. (JMD)

  17. John Rawls and Affirmative Action.

    ERIC Educational Resources Information Center

    Nagel, Thomas

    2003-01-01

    Discusses the philosophy of John Rawls, asserting that although Rawls never wrote about affirmative action, his ideas are relevant to the issue. Rawls concentrated on "ideal theory," which he believed was the theory of what constituted a truly just society. He considered slavery and racial segregation paradigms of injustice. His ideal theory of…

  18. John Wilson as Moral Educator

    ERIC Educational Resources Information Center

    Harrison, John L.

    1977-01-01

    The work of John Wilson, now teaching at Oxford University, as moral educator is summarized and evaluated. His rationalist humanistic approach is based on a componential characterization of the morally educated person. The rationale and conceptual status of the components is discussed. His position is compared to that of Peter McPhail, R. S.…

  19. John Dewey, Gothic and Modern

    ERIC Educational Resources Information Center

    Kaminsky, James S.

    2010-01-01

    It is argued here that understanding John Dewey's thought as that of a prodigal liberal or a fellow traveller does not capture the complexity of his work. It is also important to recognise the portion of his work that is "historie morale." In the very best sense it is epic, encapsulating the hopes and dreams of a history of the American people in…

  20. A Conversation with John Higham.

    ERIC Educational Resources Information Center

    Hackney, Sheldon; Higham, John

    1994-01-01

    Presents an interview by National Endowment for the Humanities chairman, Sheldon Hackney, with historian John Higham on multiculturalism and national identity. Contends that the centrifugal forces of national, ethnic, and religious diversity need countervailing forces to hold the nation together. (CFR)

  1. John Couch Adams, the astronomer.

    NASA Astrophysics Data System (ADS)

    Foster, N.

    1989-03-01

    The planet Neptune was discovered more than 140 years ago. The circumstances of the discovery gave rise to great controversy, and very nearly led to an international incident between Britain and France, but this was only one of John Couch Adams' many contributions to astronomical science.

  2. Pope John Paul the Great.

    ERIC Educational Resources Information Center

    Kelabay, Yarema

    1998-01-01

    Comments on several biographies of and articles about Pope John Paul II. Argues that he has been the most ecclesiastically consequential pontiff in centuries, revitalizing the church by crafting an evangelical Catholic response to the 21st century crisis of modernity. Suggests that the Pope should be the "man of the century." (DSK)

  3. John Eliot in Recent Scholarship.

    ERIC Educational Resources Information Center

    Cogley, Richard W.

    1990-01-01

    Reviews the recent literature on John Eliot--seventeenth-century Massachusetts missionary, minister, and millenarian. Examines disagreements between Alden Vaughan's and Francis Jennings's interpretations of Eliot's missionary writings and Puritan-Indian relations. Discusses James Axtell's ethnohistorical interpretation of Eliot. Emphasizes the…

  4. John N Bahcall (1934 2005)

    NASA Astrophysics Data System (ADS)

    Bergström, Lars; Botner, Olga; Carlson, Per; Hulth, Per Olof; Ohlsson, Tommy

    2005-01-01

    John Norris Bahcall, passed away on August 17, 2005, in NewYork City, USA. He was born on December 30, 1934, in Shreveport, Louisiana, USA. He was Richard Black Professor of Astrophysics in the School of Natural Sciences at the Institute forAdvanced Study (IAS) in Princeton, New Jersey, USA and a recipient of the National Medal of Science. In addition, he was President of the American Astronomical Society, President-Elect of the American Physical Society, and a prominent leader of the astrophysics community. John had a long and prolific career in astronomy and astrophysics, spanning five decades and the publication of more than five hundred technical articles, books, and popular papers. John's most recognized scientific contribution was the novel proposal in 1964, together with Raymond Davis Jr, that scientific mysteries of our Sun `how it shines, how old it is, how hot it is' could be examined by measuring the number of neutrinos arriving on Earth from the Sun. Measuring the properties of these neutrinos tests both our understanding of how stars shine and our understanding of fundamental particle physics. However, in the 1960s and 1970s, the observations by Raymond Davis Jr showed a clear discrepancy between John's theoretical predictions, based on standard solar and particle physics models, and what was experimentally measured. This discrepancy, known as the `Solar Neutrino Problem', was examined by hundreds of physicists, chemists, and astronomers over the subsequent three decades. In the late 1990s through 2002, new large-scale neutrino experiments in Japan, Canada, Italy, and Russia culminated in the conclusion that the discrepancy between John's theoretical predictions and the experimental results required a modification of our understanding of particle physics: neutrinos must have a mass and `oscillate' among different particle states. In addition to neutrino astrophysics, John contributed to many areas of astrophysics including the study of dark matter in

  5. A novel hybrid Neumann expansion method for stochastic analysis of mistuned bladed discs

    NASA Astrophysics Data System (ADS)

    Yuan, Jie; Allegri, Giuliano; Scarpa, Fabrizio; Patsias, Sophoclis; Rajasekaran, Ramesh

    2016-05-01

    The paper presents a novel hybrid method to enhance the computational efficiency of matrix inversions during the stochastic analysis of mistuned bladed disc systems. The method is based on the use of stochastic Neumann expansion in the frequency domain, coupled with a matrix factorization in the neighbourhood of the resonant frequencies. The number of the expansion terms is used as an indicator to select the matrix inversion technique to be used, without introducing any additional computational cost. The proposed method is validated using two case studies, where the dynamics an aero-engine bladed disc is modelled first using a lumped parameter approach and then with high-fidelity finite element analysis. The frequency responses of the blades are evaluated according to different mistuning patterns via stiffness or mass perturbations under the excitation provided by the engine orders. Results from standard matrix factorization methods are used to benchmark the responses obtained from the proposed hybrid method. Unlike classic Neumann expansion methods, the new technique can effectively update the inversion of an uncertain matrix with no convergence problems during Monte Carlo simulations. The novel hybrid method is more computationally efficient than standard techniques, with no accuracy loss.

  6. Foreword: Sir John Pendry FRS Sir John Pendry FRS

    NASA Astrophysics Data System (ADS)

    Inglesfield, John; Echenique, Pedro

    2008-07-01

    John Pendry John Inglesfield and Pedro Echenique write: John Pendry's 65th birthday is on 4 July 2008, and this issue of the Journal of Physics: Condensed Matter is dedicated to him, with articles by friends, colleagues, and former students. By any standards, John Pendry is a great scientist, who has made—and continues to make—an enormous contribution to physics; the wide range of his interests is reflected in the scope of these articles. Not many scientists can establish a completely new and unexpected area of research, but this has been John's achievement in the last few years in the field of metamaterials, materials whose electromagnetic properties depend on their structure rather than the materials of which the structure is built. In this way, structures with effectively negative electrical permittivity and negative magnetic permeability can be constructed, demonstrating negative refraction; through metamaterials scientists now have access to properties not found in nature, and never previously explored experimentally. Never a week goes by without a potential new application of metamaterials, whether it is perfect lensing, or the cloak of invisibility. This has certainly led to tremendous visibility for John himself, with guest lectures all over the world, and radio and television appearances. John Pendry's first paper was published exactly 40 years ago, 'Analytic properties of pseudopotentials' [1], and since then he has published 310 articles at the latest count. But this first paper already reflected something of the way John works. His PhD project, with Volker Heine at the Cavendish Laboratory, was to interpret the scattering of low energy electrons from surfaces, the technique of LEED which was to become the method of choice for determining surface structure. Although the energy of the electrons in LEED is relatively low—say 50 eV—it is much higher than the energy of the conduction electrons, for which pseudopotentials had been devised, and John

  7. Optimierung von Kommunikationsnetzen

    NASA Astrophysics Data System (ADS)

    Eberspächer, Jörg; Kiese, Moritz; Wessäly, Roland

    Die weltweiten Telekommunikationsnetze (Telefon-, Mobilfunknetze, Internet) bilden heute das Nervensystem von Wirtschaft und Gesellschaft. Durch den anhaltenden technologischen Fortschritt in der Elektronik, der Computer- und Kommunikationstechnik steigt nicht nur die Zahl der Teilnehmer in den Netzen ständig, sondern es entstehen auch laufend neue Anwendungen, wie Radio und Fernsehen im Internet, elektronischer Handel und interaktive Spiele im Internet. Auf den Kupfer- und Glasfaserkabeln sowie den Funkstrecken werden gigantische Informationsmengen transportiert. Das Verkehrs-wachstum ist nach wie vor exponentiell.

  8. John Glenn: Post-Flight Recovery of Friendship 7

    NASA Technical Reports Server (NTRS)

    1963-01-01

    Mini Biography of John Glenn, as it was up to 1962. From: The John Glenn Story: Summary of astronaut John Glenn's flying career, from naval aviation training to space flight. The Mercury project is featured as John Glenn flies the Friendship 7 spacecraft. President John F. Kennedy presents the NASA Distinguished service Medal to Astronaut John Glenn.

  9. John Glenn: Presented with NASA Distinguished Service Medal

    NASA Technical Reports Server (NTRS)

    1963-01-01

    John Glenn tours with his family, meets JFK and is presented with the NASA distinguished Service Medal. From: The John Glenn Story: Summary of astronaut John Glenn's flying career, from naval aviation training to space flight. The Mercury project is featured as John Glenn flies the Friendship 7 spacecraft. President John F. Kennedy presents the NASA Distinguished service Medal to Astronaut John Glenn.

  10. Charles Darwin and John Herschel

    NASA Astrophysics Data System (ADS)

    Warner, B.

    2009-11-01

    The influence of John Herschel on the philosophical thoughts of Charles Darwin, both through the former's book, Natural Philosophy, and through their meeting in 1836 at the Cape of Good Hope, is discussed. With Herschel having himself speculated on evolution just a few months before he met Darwin, it is probable that he stimulated at least the beginnings of the latter's lifelong work on the subject.

  11. The letters of John Dastin.

    PubMed

    Thiesen, Wilfred

    2008-07-01

    John Dastin, a noted alchemist who lived ca. 1300, followed the lead of many of his contemporaries and predecessors in using letters to propagate his views on alchemy. This article identifies a number of letters that Dastin wrote, and includes one text addressed to a cardinal of the city of Naples. This letter is virtually a copy of a work by Arnold of Villanova. I believe that other works ascribed to Dastin will also show a great dependence on Arnold's works. PMID:19048973

  12. John Glenn Biomedical Engineering Consortium

    NASA Technical Reports Server (NTRS)

    Nall, Marsha

    2004-01-01

    The John Glenn Biomedical Engineering Consortium is an inter-institutional research and technology development, beginning with ten projects in FY02 that are aimed at applying GRC expertise in fluid physics and sensor development with local biomedical expertise to mitigate the risks of space flight on the health, safety, and performance of astronauts. It is anticipated that several new technologies will be developed that are applicable to both medical needs in space and on earth.

  13. The KdV equation on the half-line: the Dirichlet to Neumann map

    NASA Astrophysics Data System (ADS)

    >Jonatan Lenells,

    2013-08-01

    We consider initial-boundary value problems for the KdV equation ut + ux + 6uux + uxxx = 0 on the half-line x ⩾ 0. For a well-posed problem, the initial data u(x, 0) as well as one of the three boundary values {u(0, t), ux(0, t), uxx(0, t)} can be prescribed; the other two boundary values remain unknown. We provide a characterization of the unknown boundary values for the Dirichlet as well as the two Neumann problems in terms of a system of nonlinear integral equations. The characterizations are effective in the sense that the integral equations can be solved perturbatively to all orders in a well-defined recursive scheme.

  14. The Neumann problem for elliptic equations with multiscale coefficients: operator estimates for homogenization

    NASA Astrophysics Data System (ADS)

    Pastukhova, S. E.

    2016-03-01

    We prove an L^2-estimate for the homogenization of an elliptic operator A_\\varepsilon in a domain Ω with a Neumann boundary condition on the boundary \\partialΩ. The coefficients of the operator A_\\varepsilon are rapidly oscillating over different groups of variables with periods of different orders of smallness as \\varepsilon\\to 0. We assume minimal regularity of the data, which makes it possible to impart to the result the meaning of an estimate in the operator (L^2(Ω)\\to L^2(Ω))-norm for the difference of the resolvents of the original and homogenized problems. We also find an approximation to the resolvent of the original problem in the operator (L^2(Ω)\\to H^1(Ω))-norm. Bibliography: 24 titles.

  15. Neumann and Robin boundary conditions for heat conduction modeling using smoothed particle hydrodynamics

    NASA Astrophysics Data System (ADS)

    Esmaili Sikarudi, M. A.; Nikseresht, A. H.

    2016-01-01

    Smoothed particle hydrodynamics is a robust Lagrangian particle method which is widely used in various applications, from astrophysics to hydrodynamics and heat conduction. It has intrinsic capabilities for simulating large deformation, composites, multiphysics events, and multiphase fluid flows. It is vital to use reliable boundary conditions when boundary value problems like heat conduction or Poisson equation for incompressible flows are solved. Since smoothed particle hydrodynamics is not a boundary fitted grids method, implementation of boundary conditions can be problematic. Many methods have been proposed for enhancing the accuracy of implementation of boundary conditions. In the present study a new approach for facilitating the implementation of Robin and Neumann boundary conditions is proposed and proven to give accurate results. Also there is no need to use complicated preprocessing as in virtual particle method. The new method is compared to an equivalent one dimensional moving least square scheme and it is shown that the present method is less sensitive to particle disorder.

  16. Modeling photonic crystals by boundary integral equations and Dirichlet-to-Neumann maps

    SciTech Connect

    Yuan Jianhua; Lu Yayan Antoine, Xavier

    2008-04-20

    Efficient numerical methods for analyzing photonic crystals (PhCs) can be developed using the Dirichlet-to-Neumann (DtN) maps of the unit cells. The DtN map is an operator that takes the wave field on the boundary of a unit cell to its normal derivative. In frequency domain calculations for band structures and transmission spectra of finite PhCs, the DtN maps allow us to reduce the computation to the boundaries of the unit cells. For two-dimensional (2D) PhCs with unit cells containing circular cylinders, the DtN maps can be constructed from analytic solutions (the cylindrical waves). In this paper, we develop a boundary integral equation method for computing DtN maps of general unit cells containing cylinders with arbitrary cross sections. The DtN map method is used to analyze band structures for 2D PhCs with elliptic and other cylinders.

  17. Discovery of Rickettsia species in Dermacentor niveus Neumann ticks by investigating the diversity of bacterial communities.

    PubMed

    Zhuang, Lu; Wang, Cheng-Yan; Tong, Yi-Gang; Tang, Fang; Yang, Hong; Liu, Wei; Cao, Wu-Chun

    2014-09-01

    Ticks (Dermacentor niveus Neumann) were collected from Tacheng, Xinjiang Uygur Autonomous Region, and their bacterial diversity was investigated using the 16S RNA gene library method from one pooled sample. A total of 452 clones was successfully sequenced and assigned to 4 phyla. The dominant phylum was the Proteobacteria, accounting for 62.8% of all the clones of the 16S rRNA gene at the confidence level 80%. The other sequences were assigned to the phyla Bacteroidetes, Firmicutes, Actinobacteria and accounted for 13.5%, 12.4%, and 11.3%, respectively. These results provide an insight into the bacterial diversity associated with D. niveus ticks in the natural environment of Tacheng. They indicate the occurrence of Rickettsia raoultii and Rickettsia slovaca in D. niveus ticks in this area, and as a consequence, cases of TIBOLA/DEBONEL may occur (tick-borne lymphadenopathy/Dermacentor-borne necrosis erythema and lymphadenopathy).

  18. One Measure Does Not a Construct Make: Directions toward Reinvigorating Psychopathy Research--Reply to Hare and Neumann (2010)

    ERIC Educational Resources Information Center

    Skeem, Jennifer L.; Cooke, David J.

    2010-01-01

    In our article (J. L. Skeem & D. J. Cooke, 2010), we outlined the dangers inherent in conflating the Psychopathy Checklist-Revised (PCL-R; R. Hare, 1991) with psychopathy itself. In their response, R. Hare and C. Neumann (2010) seemed to agree with key points that the PCL-R should not be confused with psychopathy and that criminal behavior is not…

  19. Dr. Wernher Von Braun

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Thomas Paine, Deputy Administrator of the National Aeronautics and Space Administration, examines an ordinary man's shoe outfitted for use in the Saturn I workshop. Pictured from the left in the Saturn I workshop mockup are William Brooksbank, propulsion and vehicle engineering laboratory; Dr. Paine; Dr. Wernher Von Braun, Marshall Center director; Colonel Clare F. Farley, Executive Officer in the Office Of The Administrator; and Charles J. Donlan, Deputy Associate Administrator for Manned Space Flight, Technical. the shoe Dr. Paine is holding has a unique fastener built into the sole to allow an astronaut to move about on the workshop floor and to remain in one position if he desires.

  20. An Alternative to Von Glasersfeld's Subjectivism in Science Education: Deweyan Social Constructivism

    NASA Astrophysics Data System (ADS)

    Garrison, Jim

    An influential view of constructivism in science and mathematics educational research and practice is that of Ernst von Glasersfeld. It is a peculiarly subjectivist form of constructivism that should not be attractive to science and mathematics educators concerned with retaining some sort of realism that leaves room for objectivity. The subjectivist constructivism of von Glasersfeld also becomes entangled in untenable mind/body and subject/object dualisms. Finally, these dualisms are unnecessary for social constructivism. I will provide one example of a social constructivist alternative to social constructivism, that of the pragmatic philosopher John Dewey. In presenting Dewey's position I will appeal to Ockham's razor, that is, the admonition not to multiply entities beyond necessity, to shave off the needless mentalistic and psychic entities that lead von Glasersfeld into his subjectivism and dualism.

  1. Finite-gap solutions of 2+1 dimensional integrable nonlinear evolution equations generated by the Neumann systems

    NASA Astrophysics Data System (ADS)

    Chen, Jinbing

    2010-08-01

    Each soliton equation in the Korteweg-de Vries (KdV) hierarchy, the 2+1 dimensional breaking soliton equation, and the 2+1 dimensional Caudrey-Dodd-Gibbon-Kotera-Sawada (CDGKS) equation are reduced to two or three Neumann systems on the tangent bundle TSN -1 of the unit sphere SN -1. The Lax-Moser matrix for the Neumann systems of degree N -1 is deduced in view of the Mckean-Trubowitz identity and a bilinear generating function, whose favorite characteristic accounts for the problem of the genus of Riemann surface matching to the number of elliptic variables. From the Lax-Moser matrix, the constrained Hamiltonians in the sense of Dirac-Poisson bracket for all the Neumann systems are written down in a uniform recursively determined by integrals of motion. The involution of integrals of motion and constrained Hamiltonians is completed on TSN -1 by using a Lax equation and their functional independence is displayed over a dense open subset of TSN -1 by a direct calculation, which contribute to the Liouville integrability of a family of Neumann systems in a new systematical way. We also construct the hyperelliptic curve of Riemann surface and the Abel map straightening out the restricted Neumann flows that naturally leads to the Jacobi inversion problem on the Jacobian with the aid of the holomorphic differentials, from which some finite-gap solutions expressed by Riemann theta functions for the 2+1 dimensional breaking soliton equation, the 2+1 dimensional CDGKS equation, the KdV, and the fifth-order KdV equations are presented by means of the Riemann theorem.

  2. John Bardeen: an extraordinary physicist

    NASA Astrophysics Data System (ADS)

    Hoddeson, Lillian

    2008-04-01

    On the morning of 1 November 1956 the US physicist John Bardeen dropped the frying-pan of eggs that he was cooking for breakfast, scattering its contents on the kitchen floor. He had just heard that he had won the Nobel Prize for Physics along with William Shockley and Walter Brattain for their invention of the transistor. That evening Bardeen was startled again, this time by a parade of his colleagues from the University of Illinois marching to the door of his home bearing champagne and singing "For He's a Jolly Good Fellow".

  3. John Dalton (1766-1844).

    PubMed Central

    Emery, A E

    1988-01-01

    There is no doubt that John Dalton ranks among the great names in science, a position which rests on his enunciation of the Atomic Theory. However, his very first scientific paper in 1798 was concerned with his own affliction of colour blindness and was in fact the first clear description of the disorder. This publication stimulated much subsequent research into the pathophysiology and genetics of the condition. His recorded observations on colour blindness are detailed and precise and betoken the approach which was to characterise all his later research in chemistry. Images PMID:3294412

  4. John Dewey: implications for schooling.

    PubMed

    Silva, D

    1977-01-01

    Propositions, whether great and lasting or insignificant and passing, reside in the "guts of the living." Each age rediscovers its Plato, Dickens, Newton, or Dewey. Each age rewrites history, redefines science, develops its own theoretical perspectives. Propositions are tentative, conditional, or relative. They depend on contemporary priorities, and on a personal space and time context. At any future moment propositions may change, perspectives alter, new choices emerge. John Dewey provided for constructive innovation in schooling and the battles about his suggested criteria continue unabated. The purpose here, however, is only to examine some of Dewey's theoretical propositions and their probable implications (1).

  5. John Dalton (1766-1844).

    PubMed

    Emery, A E

    1988-06-01

    There is no doubt that John Dalton ranks among the great names in science, a position which rests on his enunciation of the Atomic Theory. However, his very first scientific paper in 1798 was concerned with his own affliction of colour blindness and was in fact the first clear description of the disorder. This publication stimulated much subsequent research into the pathophysiology and genetics of the condition. His recorded observations on colour blindness are detailed and precise and betoken the approach which was to characterise all his later research in chemistry.

  6. John Greenleaf's life of science.

    PubMed

    Watenpaugh, Donald E

    2012-12-01

    This article summarizes the life and career of John E. Greenleaf, PhD. It complements an interview of Dr. Greenleaf sponsored by the American Physiological Society Living History Project found on the American Physiological Society website. Dr. Greenleaf is a "thought leader" and internationally renowned physiologist, with extensive contributions in human systems-level environmental physiology. He avoided self-aggrandizement and believed that deeds rather than words define one's legacy. Viewed another way, however, Greenleaf's words define his deeds: 48% of his 185 articles are first author works, which is an unusually high proportion for a scientist of his stature. He found that writing a thorough and thoughtful discussion section often led to novel ideas that drove future research. Beyond Greenleaf's words are the many students, postdocs, and collaborators lucky enough to have worked with him and thus learn and carry on his ways of science. His core principles included the following: avoid research "fads," embrace diversity, be the first subject in your own research, adhere to rules of fiscal responsibility, and respect administrative forces-but never back down from them when you know you are right. Greenleaf's integrity ensured he was usually right. He thrived on the axiom of many successful scientists: avoid falling in love with hypotheses, so that when unexpected findings appear, they arouse curiosity instead of fear. Dr. Greenleaf's legacy will include the John and Carol Greenleaf Award for prolific environmental and exercise-related publication in the Journal of Applied Physiology. PMID:23209002

  7. John Bardeen and transistor physics

    NASA Astrophysics Data System (ADS)

    Huff, Howard R.

    2001-01-01

    John Bardeen and Walter Brattain invented the point-contact semiconductor amplifier (transistor action) in polycrystalline germanium (also observed in polycrystalline silicon) on Dec. 15, 1947, for which they received a patent on Oct. 3, 1950. Bill Shockley was not a co-patent holder on Bardeen and Brattain's point-contact semiconductor amplifier patent since Julius Lilienfeld had already received a patent in 1930 for what would have been Shockley's contribution; namely, the field-effect methodology. Shockley received patents for both his minority-carrier injection concept and junction transistor theory, however, and deservedly shared the Nobel prize with Bardeen and Brattain for his seminal contributions of injection, p-n junction theory and junction transistor theory. We will review the events leading up to the invention of Bardeen and Brattain's point-contact semiconductor amplifier during the magic month of November 17-December 16, 1947 and the invention of Shockley's junction semiconductor amplifier during his magic month of December 24, 1947-January 23, 1948. It was during the course of Bardeen and Brattain's research in November, 1947 that Bardeen also patented the essence of the MOS transistor, wherein the induced minority carriers were confined to the inversion layer enroute to the collector. C. T. Sah has described this device as a sourceless MOS transistor. Indeed, John Bardeen, co-inventor of the point-contact semiconductor amplifier and inventor of the MOS transistor, may rightly be called the father of modern electronics.

  8. John Greenleaf's life of science.

    PubMed

    Watenpaugh, Donald E

    2012-12-01

    This article summarizes the life and career of John E. Greenleaf, PhD. It complements an interview of Dr. Greenleaf sponsored by the American Physiological Society Living History Project found on the American Physiological Society website. Dr. Greenleaf is a "thought leader" and internationally renowned physiologist, with extensive contributions in human systems-level environmental physiology. He avoided self-aggrandizement and believed that deeds rather than words define one's legacy. Viewed another way, however, Greenleaf's words define his deeds: 48% of his 185 articles are first author works, which is an unusually high proportion for a scientist of his stature. He found that writing a thorough and thoughtful discussion section often led to novel ideas that drove future research. Beyond Greenleaf's words are the many students, postdocs, and collaborators lucky enough to have worked with him and thus learn and carry on his ways of science. His core principles included the following: avoid research "fads," embrace diversity, be the first subject in your own research, adhere to rules of fiscal responsibility, and respect administrative forces-but never back down from them when you know you are right. Greenleaf's integrity ensured he was usually right. He thrived on the axiom of many successful scientists: avoid falling in love with hypotheses, so that when unexpected findings appear, they arouse curiosity instead of fear. Dr. Greenleaf's legacy will include the John and Carol Greenleaf Award for prolific environmental and exercise-related publication in the Journal of Applied Physiology.

  9. Wolfgang von Ohnesorge

    NASA Astrophysics Data System (ADS)

    McKinley, Gareth H.; Renardy, Michael

    2011-12-01

    This manuscript got started when one of us (G.H.M.) presented a lecture at the Institute of Mathematics and its Applications at the University of Minnesota. The presentation included a photograph of Rayleigh and made frequent mention of the Ohnesorge number. When the other of us (M.R.) enquired about a picture of Ohnesorge, we found out that none were readily available on the web. Indeed, little about Ohnesorge is available from easily accessible public sources. A good part of the reason is certainly that, unlike other "numbermen" of fluid mechanics, Ohnesorge did not pursue an academic career. The purpose of this article is to fill the gap and shed some light on the life of Wolfgang von Ohnesorge. We shall discuss the highlights of his biography, his scientific contributions, their physical significance, and their impact today.

  10. Struggle for the Soul: John Lawrence Childs

    ERIC Educational Resources Information Center

    Stallones, Jared

    2010-01-01

    John Lawrence Childs was born in Eau Claire, Wisconsin on January 11, 1889, the second child of John Nelson Childs and Helen Janette (Nettie) Smith. In childhood Childs absorbed the values of industry, democracy, and a traditional, but socially conscious, religion. Childs was a Methodist and an intensely private person not given to talking about…

  11. Symposium on John Dewey's "Art as Experience."

    ERIC Educational Resources Information Center

    Burnett, Joe R.; And Others

    1989-01-01

    Reports on a symposium about John Dewey's philosophy of art. John Fisher, Richard Shusterman, and Joe R. Burnett state their views on Dewey's contributions to art theory and aesthetics citing Dewey's work, "Art As Experience." The consensus was that although Dewey's opinions are dated, his pragmatist's views offer the opportunity for further study…

  12. John Kotter on Leadership, Management and Change.

    ERIC Educational Resources Information Center

    Bencivenga, Jim

    2002-01-01

    Excerpts from interview with John Kotter, Konosuke Matsushita Professor of Leadership at the Harvard Business School, about his thoughts on the role of the superintendent as leader and manager. Describes his recent book "John P. Kotter on What Leaders Really Do," 1999. Lists eight-step change process from his book "Leading Change," 1996. (PKP)

  13. John H. Reynolds (1923-2000)

    NASA Astrophysics Data System (ADS)

    Turner, Grenville

    John Reynolds, AGU Fellow since 1968 and a member of the Volcanology Geochemistry and Petrology section since 1961, died unexpectedly on November 4, 2000. John was a professor emeritus of physics at the University of California, Berkeley and a pioneer in the development and application of noble gas mass spectrometry He was recovering from pneumonia when he suffered a pulmonary embolism.

  14. A to Z with Jasper Johns

    ERIC Educational Resources Information Center

    Kirker, Sara Schmickle

    2008-01-01

    One contemporary artist that kindergarten students can easily relate to is Jasper Johns. In this article, the author discusses how she introduced John's numeric and alphabetic paintings to her kindergarten students. The young artists were amazed that art can be created from the familiar symbols that they are learning to make in their regular…

  15. John Henry--The Steel Driving Man

    ERIC Educational Resources Information Center

    Murphy, David E.; Gulley, Laura L.

    2005-01-01

    The story of John Henry provided the setting for sixth-grade class to participate in a John Henry Day of mathematics experiments. The students collected data from experiments where students competed against machines and technology. The student analyzed the data by comparing two box plots, a box plot of human data, and a box plot of machine or…

  16. Von Hippel-Lindau Disease.

    PubMed

    Findeis-Hosey, Jennifer J; McMahon, Kelly Q; Findeis, Sarah K

    2016-06-01

    Von Hippel-Lindau disease is an autosomal dominant syndrome which occurs secondary to germline mutations in the VHL tumor suppressor gene, located on chromosome 3. Clinically von Hippel-Lindau disease is characterized by an increased risk of developing simple visceral cysts, most commonly in the pancreas and kidneys, in addition to an increased risk of developing neoplasms, often with clear cell features, in a multitude of organ systems. The most common neoplasms are cerebellar and retinal hemangioblastomas, adrenal pheochromocytomas, clear cell renal cell carcinomas, pancreatic neuroendocrine tumors, pancreatic serous cystadenomas, and endolymphatic sac tumors. These lesions most commonly present during adulthood; however, screening and surveillance for the development of these lesions should begin in the pediatric years for patients with von Hippel-Lindau disease. In this review article, the genetics and most common neoplasms of von Hippel-Lindau disease are reviewed, with an eye towards implications for the pediatric patient. PMID:27617152

  17. Pregnancy and von Gierke's disease.

    PubMed

    Farber, M; Knuppel, R A; Binkiewicz, A; Kennison, R D

    1976-02-01

    A detailed description of the course of pregnancy in a patient with von Gierke's disease is presented. Careful dietary control together with proper management of the hematologic complications of the disease led to a successful outcome. PMID:1061911

  18. von Braun and German Publisher

    NASA Technical Reports Server (NTRS)

    1969-01-01

    In this photograph, Guenter Ogger of Capitol Magazine, West Germany, greets Marshall Space Flight Center Director, Dr. Wernher von Braun. Mr. Ogger interviewed the famous rocket scientist for his magazine.

  19. Von Karman and JATO Team

    NASA Technical Reports Server (NTRS)

    1940-01-01

    Dr. Theodore von Karman (black coat) sketches out a plan on the wing of an airplane as his JATO engineering team looks on. From left to right: Dr. Clark B. Millikan, Dr.Martin Summerfield, Dr. Theodore von Karman, Dr. Frank J. Malina and pilot, Capt. Homer Boushey. Captain Boushey would become the first American to pilot an airplane that used JATO (Jet Assisted Take-Off) solid propellent rockets.

  20. Photocopy of photograph (from Mrs. Martin, grandniece of John French, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of photograph (from Mrs. Martin, grandniece of John French, Clinton, Missouri) Circa 1900, photographer unknown JOHN AND ALMIRA FRENCH IN FRONT OF WEST AND SOUTH FACADES - John French Farm, South Grand River, Deepwater, Henry County, MO

  1. Asymptotic expansion of the trace of the heat kernel associated to the Dirichlet-to-Neumann operator

    NASA Astrophysics Data System (ADS)

    Liu, Genqian

    2015-10-01

    For a given bounded domain Ω with smooth boundary in a smooth Riemannian manifold (M, g), by decomposing the Dirichlet-to-Neumann operator into a sum of the square root of the Laplacian and a pseudodifferential operator, and by applying Grubb's method of symbolic calculus for the corresponding pseudodifferential heat kernel operators, we establish a procedure to calculate all the coefficients of the asymptotic expansion of the trace of the heat kernel associated to Dirichlet-to-Neumann operator as t →0+. In particular, we explicitly give the first four coefficients of this asymptotic expansion. These coefficients provide precise information regarding the area and curvatures of the boundary of the domain in terms of the spectrum of the Steklov problem.

  2. A comparison between Dirichlet and Neumann boundary conditions for 0D/3D coupling in cardiovascular simulations

    NASA Astrophysics Data System (ADS)

    Esmaily Moghadam, Mahdi; Hsia, Tain-Yen; Marsden, Alison

    2011-11-01

    Implementation of boundary conditions (BCs) in cardiovascular simulations poses numerical challenges due to the complex dynamic behavior of the circulatory system. A closed-loop lumped parameter network (LPN) coupled to a 3D domain is a powerful tool that can be used to model the global dynamics of the circulatory system and its response to local changes in surgery design. In this study, the essential formulations for coupling a 0D model using both Dirichlet and Neumann BCs to a discretized 3D finite element domain are discussed. Using a closed loop LPN with a heart model and pure Dirichlet or Neumann BCs, the limitations of these two approaches are studied and stability, accuracy, and computational cost are compared. Results show that the Dirichlet BC is more accurate for the tested mesh sizes with better stability characteristic at larger time step sizes, although this method requires additional velocity profile information. Application to patient specific models is also presented and discussed.

  3. John Bahcall and the Solar Neutrino Problem

    NASA Astrophysics Data System (ADS)

    Bahcall, Neta

    2016-03-01

    ``I feel like dancing'', cheered John Bahcall upon hearing the exciting news from the SNO experiment in 2001. The results confirmed, with remarkable accuracy, John's 40-year effort to predict the rate of neutrinos from the Sun based on sophisticated Solar models. What began in 1962 by John Bahcall and Ray Davis as a pioneering project to test and confirm how the Sun shines, quickly turned into a four-decade-long mystery of the `Solar Neutrino Problem': John's models predicted a higher rate of neutrinos than detected by Davis and follow-up experiments. Was the theory of the Sun wrong? Were John's calculations in error? Were the neutrino experiments wrong? John worked tirelessly to understand the physics behind the Solar Neutrino Problem; he led the efforts to greatly increase the accurately of the solar model, to understand its seismology and neutrino fluxes, to use the neutrino fluxes as a test for new physics, and to advocate for important new experiments. It slowly became clear that none of the then discussed possibilities --- error in the Solar model or neutrino experiments --- was the culprit. The SNO results revealed that John's calculations, and hence the theory of the Solar model, have been correct all along. Comparison of the data with John's theory demanded new physics --- neutrino oscillations. The Solar Neutrino saga is one of the most amazing scientific stories of the century: exploring a simple question of `How the Sun Shines?' led to the discovery of new physics. John's theoretical calculations are an integral part of this journey; they provide the foundation for the Solar Neutrino Problem, for confirming how the Sun shines, and for the need of neutrino oscillations. His tenacious persistence, dedication, enthusiasm and love for the project, and his leadership and advocacy of neutrino physics over many decades are a remarkable story of scientific triumph. I know John is smiling today.

  4. Blow-up problems for the heat equation with a local nonlinear Neumann boundary condition

    NASA Astrophysics Data System (ADS)

    Yang, Xin; Zhou, Zhengfang

    2016-09-01

    This paper estimates the blow-up time for the heat equation ut = Δu with a local nonlinear Neumann boundary condition: The normal derivative ∂ u / ∂ n =uq on Γ1, one piece of the boundary, while on the rest part of the boundary, ∂ u / ∂ n = 0. The motivation of the study is the partial damage to the insulation on the surface of space shuttles caused by high speed flying subjects. We show the finite time blow-up of the solution and estimate both upper and lower bounds of the blow-up time in terms of the area of Γ1. In many other work, they need the convexity of the domain Ω and only consider the problem with Γ1 = ∂ Ω. In this paper, we remove the convexity condition and only require ∂Ω to be C2. In addition, we deal with the local nonlinearity, namely Γ1 can be just part of ∂Ω.

  5. Spectral analysis of approximations of Dirichlet-Neumann operators and nonlocal shallow water wave models

    NASA Astrophysics Data System (ADS)

    Vargas-Magaña, Rosa; Panayotaros, Panayotis

    2015-11-01

    We study the problem of wave propagation in a long-wave asymptotic regime over variable bottom of an ideal irrotational fluid in the framework of the Hamiltonian formulation in which the non-local Dirichlet-Neumann (DtN) operator appears explicitly in the Hamiltonian. We propose a non-local Hamiltonian model for bidirectional wave propagation in shallow water that involves pseudodifferential operators that approximate the DtN operator for variable depth. These models generalize the Boussinesq system as they include the exact dispersion relation in the case of constant depth. We present results for the normal modes and eigenfrequencies of the linearized problem. We see that variable topography introduces effects such as steepening of normal modes with increasing variation of depth, as well as amplitude modulation of the normal modes in certain wavelength ranges. Numerical integration shows that the constant depth nonlocal Boussinesq model with quadratic nonlinearity can capture the evolution obtained with higher order approximations of the DtN operator. In the case of variable depth we observe certain oscillations in width of the crest and also some interesting textures in the evolution of wave crests during the passage from obstacles.

  6. 1. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 SOUTHEAST PERSPECTIVE. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  7. 9. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 SOUTHWEST PERSPECTIVE. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  8. 11. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 CHAPEL INTERIOR. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  9. Richard von Volkmann

    PubMed Central

    Willy, Christian; Schneider, Peter; Engelhardt, Michael; Hargens, Alan R.

    2008-01-01

    Richard von Volkmann (1830–1889), one of the most important surgeons of the 19th century, is regarded as one of the fathers of orthopaedic surgery. He was a contemporary of Langenbeck, Esmarch, Lister, Billroth, Kocher, and Trendelenburg. He was head of the Department of Surgery at the University of Halle, Germany (1867–1889). His popularity attracted doctors and patients from all over the world. He was the lead physician for the German military during two wars. From this experience, he compared the mortality of civilian and war injuries and investigated the general poor hygienic conditions in civilian hospitals. This led him to introduce the “antiseptic technique” to Germany that was developed by Lister. His powers of observation and creativity led him to findings and achievements that to this day bear his name: Volkmann’s contracture and the Hueter-Volkmann law. Additionally, he was a gifted writer; he published not only scientific literature but also books of children’s fairy tales and poems under the pen name of Richard Leander, assuring him a permanent place in the world of literature as well as orthopaedics. PMID:18196438

  10. Medicine in John Locke's philosophy.

    PubMed

    Sanchez-Gonzalez, M A

    1990-12-01

    John Locke's philosophy was deeply affected by medicine of his times. It was specially influenced by the medical thought and practice of Thomas Sydenham. Locke was a personal friend of Sydenham, expressed an avid interest in his work and shared his views and methods. The influence of Sydenham's medicine can be seen in the following areas of Locke's philosophy: his "plain historical method"; the emphasis on observation and sensory experience instead of seeking the essence of things; the rejection of hypotheses and principles; the refusal of research into final causes and inner mechanisms; the ideal of irrefutable evidence and skepticism on the possibilities of certainty in science. The science which for Locke held the highest paradigmatic value in his theory of knowledge was precisely medicine. To a great extent, Locke's Essay on Human Understanding can be understood as an attempt to justify, substantiate, and promote Sydenham's medical method. This method, generalized, was then proposed as an instrument for the elaboration of all natural sciences.

  11. Explicit Von Neumann Stability Conditions for the c-tau Scheme: A Basic Scheme in the Development of the CE-SE Courant Number Insensitive Schemes

    NASA Technical Reports Server (NTRS)

    Chang, Sin-Chung

    2005-01-01

    As part of the continuous development of the space-time conservation element and solution element (CE-SE) method, recently a set of so call ed "Courant number insensitive schemes" has been proposed. The key advantage of these new schemes is that the numerical dissipation associa ted with them generally does not increase as the Courant number decre ases. As such, they can be applied to problems with large Courant number disparities (such as what commonly occurs in Navier-Stokes problem s) without incurring excessive numerical dissipation.

  12. Archival Footage: John Glenn's Mercury Flight

    NASA Video Gallery

    Archival films document John Glenn's historic Feb. 20, 1962 Mercury flight in his Friendship 7, in which he became the first American to orbit the Earth. Clips include boarding the capsule, splashd...

  13. Obituary: John Louis Perdrix (1926-2005)

    NASA Astrophysics Data System (ADS)

    Orchiston, W.

    2005-12-01

    On 27 June 2005 the Journal of Astronomical History and Heritage lost its founder and Australia lost one of its leading historians of astronomy when John Louis Perdrix died in Dubai after a brief battle with cancer.

  14. John Dewey--Philosopher and Educational Reformer

    ERIC Educational Resources Information Center

    Talebi, Kandan

    2015-01-01

    John Dewey was an American philosopher and educator, founder of the philosophical movement known as pragmatism, a pioneer in functional psychology, and a leader of the progressive movement in education in the United States.

  15. AIDS clinical trials at John Hopkins.

    PubMed

    2000-01-01

    AIDS clinical trials at Johns Hopkins are described. Contact information, criteria for volunteers, and a brief description are provided. Trial topics include treatments for HIV-1 disease, neurology, and ocular immunology.

  16. John Twysden and John Palmer: 17th-century Northamptonshire astronomers

    NASA Astrophysics Data System (ADS)

    Frost, M. A.

    2008-01-01

    John Twysden (1607-1688) and John Palmer (1612-1679) were two astronomers in the circle of Samuel Foster (circa 1600-1652), the subject of a recent paper in this journal. John Twysden qualified in law and medicine and led a peripatetic life around England and Europe. John Palmer was Rector of Ecton, Northamptonshire and later Archdeacon of Northampton. The two astronomers catalogued observations made from Northamptonshire from the 1640s to the 1670s. In their later years Twysden and Palmer published works on a variety of topics, often astronomical. Palmer engaged in correspondence with Henry Oldenburg, the first secretary of the Royal Society, on topics in astronomy and mathematics.

  17. John F. Kennedy Space Center

    NASA Technical Reports Server (NTRS)

    2006-01-01

    The John F. Kennedy Space Center, America's spaceport, is located along Florida's eastern shore on Cape Canaveral. Established as NASA's Launch Operations Center on July 1, 1962, the center has been the site of launching all U.S. human space flight missions, from the early days of Project Mercury to the space shuttle and the next generation of vehicles. In addition, the center is home to NASA's Launch Services Program, which coordinates all expendable vehicle launches carrying a NASA payload.

    With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet.

    ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products.

    The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping, and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

    The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

    Size: 32.6 by 51.2 kilometers (20.2 by 32.2 miles) Location: 28.6 degrees North latitude, 80.6 degrees West longitude Orientation: North at top Image Data: ASTER bands 3, 2, and 1 Original Data Resolution: 15 meters (49

  18. Obituary: John W. Firor (1927-2007)

    NASA Astrophysics Data System (ADS)

    Gilman, Peter A.

    2009-12-01

    John W. Firor, a former Director of the High Altitude Observatory and the National Center for Atmospheric Research, and a founder of the Solar Physics Division of the American Astronomical Society, died of Alzheimer's disease in Pullman, Washington on November 5, 2007, he was 80. He was born in Athens Georgia on October 18, 1927, where his father was a professor of agricultural economics. John had an unusually diverse scientific career. His interest in physics and astrophysics began while serving in the army, during which time he was assigned to the Los Alamos National Laboratory, where he guarded highly radioactive materials (many have heard him describe how informal the protections were compared to later times). After his service he returned to college and graduated in physics from Georgia Tech in 1949. He received his Ph.D. from the University of Chicago in 1954, writing his thesis on cosmic rays under John Simpson. John Firor would later remark that: "If you needed cosmic rays to actually do anything, you are sunk." That thought, partly in jest, may help explain his motivation for moving to so many new scientific and management pursuits. John moved from cosmic ray physics to radio astronomy (particularly of the Sun) when he began work at the Carnegie Institution of Washington's Department of Terrestrial Magnetism, where he remained until 1961. During this time, he met Walter Orr Roberts, then the Director of the High Altitude Observatory (HAO) in Boulder, Colorado. HAO was then affiliated with the University of Colorado. In 1959, a movement began to upgrade the atmospheric sciences in the United States by establishing a National Center, where the largest, most important atmospheric research problems could be addressed. Roberts became the first Director of NCAR, as well as the first president of the University Corporation for Atmospheric Research (UCAR), the consortium of universities that was commissioned to manage and staff the new Center. HAO became a

  19. von Willebrand Disease (For Parents)

    MedlinePlus

    ... Type 2A or Type 2B. People with Type 3 (and some with Type 2A and 2B) will need treatment with Humate-P, an intravenous medication derived from human plasma that contains factor VIII and von Willebrand factor. ...

  20. Exceptional Scholarship and Democratic Agendas: Interviews with John Goodlad, John Hoyle, Joseph Murphy, and Thomas Sergiovanni

    ERIC Educational Resources Information Center

    Mullen, Carol A.

    2009-01-01

    This portraiture study of four exceptional scholars in education--John Goodlad, John Hoyle, Joseph Murphy, and Thomas Sergiovanni--provides insight into their scholarly work and life habits, direction and aspirations, assessment and analysis of major trends in the profession, and advice for aspiring leaders and academics. Telephone interviews with…

  1. Conceptions of Childhood in the Educational Philosophies of John Locke and John Dewey

    ERIC Educational Resources Information Center

    Bynum, Gregory Lewis

    2015-01-01

    This article compares progressive conceptions of childhood in the educational philosophies of John Locke and John Dewey. Although the lives of the two philosophers were separated by an ocean and two centuries of history, they had in common the following things: (1) a relatively high level of experience working with, and observing, children that is…

  2. Influences on the Founder of the Johns Hopkins University and the Johns Hopkins Medical School.

    ERIC Educational Resources Information Center

    Parker, Franklin

    1994-01-01

    Explains how George Peabody, self-made millionaire and educational philanthropist, was one of three powerful men who influenced Johns Hopkins in founding Johns Hopkins University (the other two being Dr. Joseph Parrish and Dr. Patrick Macaulay). The article looks at how Hopkins, like Peabody, used his wealth for philanthropic purposes. (SM)

  3. Press Site Auditorium dedicated to John Holliman

    NASA Technical Reports Server (NTRS)

    1999-01-01

    From left, Center Director Roy Bridges and NASA Administrator Daniel S. Goldin applaud as Jay Holliman, with the help of his mother, Mrs. Dianne Holliman, unveils a plaque honoring his father, the late John Holliman. At right is Tom Johnson, news group chairman of CNN. The occasion was the dedication of the KSC Press Site auditorium as the John Holliman Auditorium to honor the CNN national correspondent for his enthusiastic, dedicated coverage of America's space program. The auditorium was built in 1980 and has been the focal point for new coverage of Space Shuttle launches. The ceremony followed the 94th launch of a Space Shuttle, on mission STS-96, earlier this morning.

  4. Press Site Auditorium dedicated to John Holliman

    NASA Technical Reports Server (NTRS)

    1999-01-01

    NASA Administrator Daniel S. Goldin hands Mrs. Dianne Holliman a plaque honoring her late husband, John Holliman, a CNN national correspondent. Standing behind Goldin is Center Director Roy Bridges. At right is Tom Johnson, news group chairman of CNN. A ceremony dedicated the KSC Press Site auditorium as the John Holliman Auditorium to honor the correspondent for his enthusiastic, dedicated coverage of America's space program. The auditorium was built in 1980 and has been the focal point for new coverage of Space Shuttle launches. The ceremony followed the 94th launch of a Space Shuttle, on mission STS-96, earlier this morning.

  5. Sir John Gurdon: Father of nuclear reprogramming

    PubMed Central

    Blau, Helen M.

    2015-01-01

    Sir John Gurdon founded the field of nuclear reprogramming. His work set the stage for the ever burgeoning area of stem cell biology and regenerative medicine. Here I provide personal reflections on times I shared with John Gurdon and professional reflections of the impact of his ground-breaking research on my own development as a scientist and on the field in general. His paradigm-shifting experiments will continue to provoke scientists to think outside the box for many years to come. PMID:24954777

  6. Obituary: John Louis Perdrix, 1926-2005

    NASA Astrophysics Data System (ADS)

    Orchiston, D. Wayne

    2006-12-01

    John Perdrix, astronomical historian and co-founder of the Journal of Astronomical History and Heritage, died on 27 June 2005. John Louis Perdrix was born in Adelaide, Australia, on 30 June 1926. After studying chemistry at Melbourne Technical College and working in industry, he joined the Commonwealth Scientific and Industrial Research Organisation's Division of Minerals and Geochemistry. In 1974 the Division relocated to the Western Australian capital, Perth, and John spent the rest of his working life there involved in geochemical research. From his teenage years John had a passion for astronomy, which he fine-tuned through the Astronomical Society of Victoria and the Victorian Branch of the British Astronomical Association. He was very active in both groups, serving as President of the former and Secretary/Treasurer of the latter. He was also an FRAS, and a member of the AAS, the BAA parent body, and the IAU (Commission 41)?no mean feat for an Australian amateur astronomer. Throughout his life, he was a strong advocate of close amateur-professional relations. John's main research interest was history of astronomy, and over the years he wrote a succession of research papers, mainly about aspects of Australian astronomy. His well-researched and neatly-illustrated papers on the Melbourne Observatory and the Great Melbourne Telescope are classics, and when the Observatory's future was in the balance they played a key role in the State Government's decision to convert this unique facility into a museum precinct. To support his research activities, John built up an amazing library that developed its own distinctive personality and quickly took over his house and garage before invading commercial storage facilities! Apart from writing papers, John had an even greater passion for editing and publishing. From 1985 to 1997 he produced the Australian Journal of Astronomy, and in 1998 this was replaced by the Journal of Astronomical History and Heritage (JAH2). Both

  7. Dr. von Braun Briefing Walt Disney

    NASA Technical Reports Server (NTRS)

    1965-01-01

    Dr. von Braun began his association with Walt Disney in the 1950s when the rocket scientist appeared in three Disney television productions related to the exploration of space. Years later, Dr. von Braun invited Disney and his associates to tour the Marshall Space Flight Center (MSFC) in Huntsville, Alabama. This photograph is dated April 13, 1965. From left are R.J. Schwinghamer from the MSFC, Disney, B.J. Bernight, and Dr. von Braun.

  8. John Paul College: The Professional Renewal Journey

    ERIC Educational Resources Information Center

    Mundie, Pauline; Marr, Robert

    2014-01-01

    John Paul College, a K-12 School in Queensland, Australia, recognises the centrality of classroom teachers to the ongoing improvement of student outcomes. The College has implemented a multi-tiered "professional renewal and assessment process." These changes of emphasis are the result of significant research and subsequent/associated…

  9. The Life and Work of John Snow

    ERIC Educational Resources Information Center

    Melville, Wayne; Fazio, Xavier

    2007-01-01

    Due to his work to determine how cholera was spread in the 18th century, John Snow (1813-1858) has been hailed as the father of modern epidemiology. This article presents an inquiry model based on his life and work, which teachers can use to develop a series of biology lessons involving the history and nature of science. The lessons presented use…

  10. Press Site Auditorium dedicated to John Holliman

    NASA Technical Reports Server (NTRS)

    1999-01-01

    A ceremony dedicated the KSC Press Site auditorium as the John Holliman Auditorium to honor the correspondent for his enthusiastic, dedicated coverage of America's space program. The auditorium was built in 1980 and has been the focal point for new coverage of Space Shuttle launches. The ceremony followed the 94th launch of a Space Shuttle, on mission STS-96, earlier this morning.

  11. John Wilkes Booth and the Lincoln Conspiracy.

    ERIC Educational Resources Information Center

    Nufrio, Ronald M.

    The 1865 conspiracy to assassinate Abraham Lincoln also included plans to assassinate other government officials on that same April evening. The actor, John Wilkes Booth, succeeded in killing Lincoln, but his fellow conspirators bungled their attempts to kill William Seward, Andrew Johnson, Ulysses S. Grant, and possibly Edwin Stanton. In…

  12. John Todd--Numerical Mathematics Pioneer

    ERIC Educational Resources Information Center

    Albers, Don

    2007-01-01

    John Todd, now in his mid-90s, began his career as a pure mathematician, but World War II interrupted that. In this interview, he talks about his education, the significant developments in his becoming a numerical analyst, and the journey that concluded at Caltech. Among the interesting stories are how he met his wife-to-be the mathematician Olga…

  13. We, John Dewey's Audience of Today

    ERIC Educational Resources Information Center

    da Cunha, Marcus Vinicius

    2016-01-01

    This article suggests that John Dewey's "Democracy and Education" does not describe education in an existing society, but it conveys a utopia, in the sense coined by Mannheim: utopian thought aims at instigating actions towards the transformation of reality, intending to attain a better world in the future. Today's readers of Dewey (his…

  14. John Furlong and the "University Project"

    ERIC Educational Resources Information Center

    Watson, David

    2014-01-01

    Like many senior teacher-educators and educational researchers, John Furlong has faced in several directions throughout his career, sometimes simultaneously. He has clearly not lost his enthusiasm for what happens in the classroom: he strongly appreciates those magical moments which can happen at any time, and which keep teachers going. He loves…

  15. John B. Watson's Legacy: Learning and Environment.

    ERIC Educational Resources Information Center

    Horowitz, Frances Degen

    1992-01-01

    Evaluates John B. Watson's contributions to developmental psychology. Watson's insistence on objective methodology in psychology retains its influence, but his extreme environmentalism has been rejected. His concern with the principles of learning is reflected in the work of Hull and Skinner. (BC)

  16. Obituary: John Leroy Climenhaga, 1916-2008

    NASA Astrophysics Data System (ADS)

    Scarfe, Colin

    2009-01-01

    John Leroy Climenhaga was born on 7 November 1916 on a farm some 10 km from Delisle, a small town on the Canadian prairies, located about 50 km south-west of Saskatoon, Saskatchewan, and died at his home in Victoria, British Columbia, on 27 May 2008. His parents, Reuben and Elizabeth (nee Bert) Climenhaga, were farming folk, and he carried their honest and open attitude to the world throughout his life. John was the seventh born, and last to die, of their ten children. His father also served as an ordained minister of the Brethren in Christ. In early adulthood, John worked on his father's farm, but then attended the University of Saskatchewan, obtaining a B.A. with Honors in Mathematics and Physics and an M.A. in Physics, in 1945 and 1949 respectively. Between these events he worked as a Physics Instructor at Regina College from 1946 to 1948. In 1949 Climenhaga joined the faculty of Victoria College, as one of only two physicists in a small institution that was then part of the University of British Columbia. He remained in Victoria for the rest of his career, playing a major role in the College's growth into a full-fledged university, complete with thriving graduate programs in physics and astronomy as well as in many other fields. He served as Head of the Physics Department during the 1960s, a period which saw the College become the University of Victoria, with a full undergraduate program in Physics, and campaigned successfully for the establishment of a program in Astronomy, which began in 1965. From 1969 until 1972 he held the position of Dean of Arts and Science, and championed the university's participation in the Tri-University Meson Facility, whose high-current medium-energy beam was ideal for the production and study of mesons and their physics. That period was a turbulent one in the university's history, but John's integrity and his balanced and fair-minded approach to conflicts were of immeasurable importance in steering the young institution through it

  17. Speaking Personally--With John Seely Brown

    ERIC Educational Resources Information Center

    American Journal of Distance Education, 2008

    2008-01-01

    This article presents an interview with John Seely Brown, a visiting scholar at the University of Southern California and a former chief scientist of Xerox Corporation and director of its Palo Alto Research Center (PARC)--a position he held for nearly two decades. While head of PARC, Brown expanded the role of corporate research to include such…

  18. Speaking Personally--With John "Pathfinder" Lester

    ERIC Educational Resources Information Center

    Beaubois, Terry

    2013-01-01

    John Lester is currently the chief learning officer at ReactionGrid, a software company developing 3-D simulations and multiuser virtual world platforms. Lester's background includes working with Linden Lab on Second Life's education activities and neuroscience research. His primary focus is on collaborative learning and instructional…

  19. John Hull and the Money Culture

    ERIC Educational Resources Information Center

    Attfield, David

    2008-01-01

    John Hull's recent educational writings have included several on what he calls the "money culture". This is analysed and criticised in this article. Hull offers a Marxist and a neo-Marxist account of the role of money in western societies utilising the labour theory of value, false consciousness and the materialist interpretation of history. It is…

  20. Jean Piaget's Debt to John Dewey

    ERIC Educational Resources Information Center

    Tanner, Daniel

    2016-01-01

    Jean Piaget became a veritable institution unto himself in education and psychology, largely as the result of his developmental-stage theory advanced over the second quarter of the twentieth century. Not until Piaget was 73 did he make mention of John Dewey's work at Dewey's laboratory school, founded in 1894 at the University of Chicago. But here…

  1. John Dewey on Philosophy and Childhood

    ERIC Educational Resources Information Center

    Gregory, Maughn; Granger, David

    2012-01-01

    John Dewey was not a philosopher of education in the now-traditional sense of a doctor of philosophy who examines educational ends, means, and controversies through the disciplinary lenses of epistemology, ethics, and political theory, or of agenda-driven schools such as existentialism, feminism, and critical theory. Rather, Dewey was both an…

  2. John Langstaff: Community Musician and Reveler

    ERIC Educational Resources Information Center

    Bartolome, Sarah J.; Campbell, Patricia Shehan

    2009-01-01

    John Langstaff fits within a select group of pathfinders in American music education who have shaped the profession's service to schools and society with special attention to the traditional musical expressions of American folk. His life and works are worthy of study for the contributions he made as a singer who modelled the nuances of traditional…

  3. Capitalism in Six Westerns by John Ford

    ERIC Educational Resources Information Center

    Braun, Carlos Rodriguez

    2011-01-01

    The economic and institutional analysis of capitalism can be illustrated through John Ford's Westerns. This article focuses on six classics by Ford that show the move toward modern order, the creation of a new society, and the rule of law. Economic features are pervading, from property rights and contracts to markets, money, and trade. Ford has…

  4. John Dewey's Conundrum: Can Democratic Schools Empower?

    ERIC Educational Resources Information Center

    Shutz, Aaron

    2001-01-01

    Examines John Dewey's vision of and concerns for democratic education, arguing that his approach failed to equip students to act effectively in the world as it was (and still is) and that his model of democracy, while extremely useful, is nonetheless inadequate to serve the varied needs of students living in a diverse and contentious society. (SM)

  5. John W. Thoburn: International Humanitarian Award

    ERIC Educational Resources Information Center

    American Psychologist, 2012

    2012-01-01

    Presents a short biography of the winner of the American Psychological Association's International Humanitarian Award. The 2012 winner, John W. Thoburn, is an extraordinary psychologist who devotes himself consistently to service to underserved populations, especially in the aftermath of natural or human-induced disasters. He exemplifies a genuine…

  6. John F. Kennedy School and Community Center.

    ERIC Educational Resources Information Center

    Atlanta Public Schools, GA.

    Located near an existing neighborhood health clinic, the John F. Kennedy School and Community Center provides a neighborhood base for numerous educational, health, and social agencies. The middle school can accommodate over 1,000 students in grades six through eight. The community center fills the need for civic and social organizations often…

  7. John Dewey and Adult Learning in Museums

    ERIC Educational Resources Information Center

    Monk, David F.

    2013-01-01

    The objective of this article is to investigate learning in museums through the lens of John Dewey's philosophy of education and experiential learning. The influence of Dewey's philosophy of education is widespread and resounding. In this article, I examine the experiential qualities of Dewey's philosophy and compare it with the objectives of the…

  8. John Moulton Homestead, water channel with board cover for walkway ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Moulton Homestead, water channel with board cover for walkway to house, looking east - John Moulton Homestead, Northwest corner of Mormon Row Road and Antelope Flats Road, Kelly, Teton County, WY

  9. 7. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 CHAPEL AND CLASSROOM, SOUTHWEST PERSPECTIVE. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  10. 8. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 WEST ELEVATION OF CHAPEL. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  11. 10. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 MEMORIAL PLAQUE IN CHAPEL. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  12. 6. Historic American Buildings Survey, John A. Bryan, Photographer July ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey, John A. Bryan, Photographer July 9, 1952 SOUTH WALL OF CHAPEL. - St. John's Episcopal Mission, Chapel & Rectory, Fort Bennett Vicinity, Green Grass, Dewey County, SD

  13. Obituary: John J. Hillman, 1938-2006

    NASA Astrophysics Data System (ADS)

    Chanover, Nancy

    2007-12-01

    John J. Hillman, a dedicated NASA civil servant, spectroscopist, astrophysicist, planetary scientist, and mentor, died on February 12, 2006 of ocular melanoma at his home in Columbia, Maryland. His professional and personal interests were wide-reaching and varied, and he devoted his career to the advancement of our understanding of the beauty and wonder in the world around us. His love of nature, art, and science made him a true Renaissance man. John was born in Fort Jay, New York, on November 22, 1938, and was raised in Washington, D.C. He received his B.S., M.S., and Ph.D. degrees in Physics from American University in 1967, 1970, and 1975, respectively. He began working at NASA's Goddard Space Flight Center, then in its infancy, in 1969, juggling a full-time position as a Research Physicist, the completion of his M.S. and Ph.D. degrees, and a young family. His background in molecular spectroscopy enabled him to apply his skills to numerous disciplines within NASA: infrared and radio astronomy; electronic, vibrational, and rotational structure of interstellar molecules; solar and stellar atmospheres; and planetary atmospheres. He published more than 70 journal papers in these disciplines. He was a frequent contributor to the Ohio State University International Symposium on Molecular Spectroscopy, and possessed a rare ability to bridge the gap between laboratory and remote sensing spectroscopy, bringing scientists from different disciplines together to understand our Universe. The last fifteen years of John's career were devoted to the development of acousto-optic tunable filter (AOTF) cameras. He championed this technology as a low-cost, low-power alternative to traditional imaging cameras for in situ or remotely sensed planetary exploration. It was within this context that I got to know John, and eventually worked closely with him on the demonstration and application of this technology for planetary science using ground-based telescopes in New Mexico, California

  14. Weather Forecasting From Woolly Art to Solid Science

    NASA Astrophysics Data System (ADS)

    Lynch, P.

    THE PREHISTORY OF SCIENTIFIC FORECASTING Vilhelm Bjerknes Lewis Fry Richardson Richardson's Forecast THE BEGINNING OF MODERN NUMERICAL WEATHER PREDICTION John von Neumann and the Meteorology Project The ENIAC Integrations The Barotropic Model Primitive Equation Models NUMERICAL WEATHER PREDICTION TODAY ECMWF HIRLAM CONCLUSIONS REFERENCES

  15. Schwarzschild, Martin (1912-97)

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    Astrophysicist, born in Potsdam, Germany, the son of KARL SCHWARZSCHILD, left Germany, became professor at Princeton University. Working with John von Neumann, Schwarzschild used the powers of the newly developed electronic digital computers to work on the theory of stellar structure and evolution. He uncovered phenomena in red giant stars, including how they evolve off the main sequence in the H...

  16. 33 CFR 110.183 - St. Johns River, Florida.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false St. Johns River, Florida. 110.183... ANCHORAGE REGULATIONS Anchorage Grounds § 110.183 St. Johns River, Florida. (a) The anchorage grounds—(1... anchor in the St. Johns River, as depicted on NOAA chart 11491, between the entrance buoy (STJ) and...

  17. 33 CFR 110.183 - St. Johns River, Florida.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false St. Johns River, Florida. 110.183... ANCHORAGE REGULATIONS Anchorage Grounds § 110.183 St. Johns River, Florida. (a) The anchorage grounds—(1... anchor in the St. Johns River, as depicted on NOAA chart 11491, between the entrance buoy (STJ) and...

  18. 33 CFR 110.183 - St. Johns River, Florida.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false St. Johns River, Florida. 110.183... ANCHORAGE REGULATIONS Anchorage Grounds § 110.183 St. Johns River, Florida. (a) The anchorage grounds—(1... anchor in the St. Johns River, as depicted on NOAA chart 11491, between the entrance buoy (STJ) and...

  19. 7. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. John and James Dobson Carpet Mill, East and West Parcels, May 17, 1926, (John and James Dobson, Inc. East Falls, Aero Service Corp., Neg. No. 5986, May 17, 1926, Free Library of Philadelphia, Print Collection). - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  20. Uniform regularity estimates in homogenization theory of elliptic systems with lower order terms on the Neumann boundary problem

    NASA Astrophysics Data System (ADS)

    Xu, Qiang

    2016-10-01

    In this paper, we mainly employed the idea of the previous paper [34] to study the sharp uniform W 1 , p estimates with 1 < p ≤ ∞ for more general elliptic systems with the Neumann boundary condition on a bounded C 1 , η domain, arising in homogenization theory. Based on the skills developed by Z. Shen in [27] and by T. Suslina in [31,32], we also established the L2 convergence rates on a bounded C 1 , 1 domain and a Lipschitz domain, respectively. Here we found a "rough" version of the first order correctors (see (1.12)), which can unify the proof in [27] and [32]. It allows us to skip the corresponding convergence results on Rd that are the preconditions in [31,32]. Our results can be regarded as an extension of [23] developed by C. Kenig, F. Lin, Z. Shen, as well as of [32] investigated by T. Suslina.

  1. Modification of the Douglas Neumann program to improve the efficiency of predicting component interference and high lift characteristics

    NASA Technical Reports Server (NTRS)

    Bristow, D. R.; Grose, G. G.

    1978-01-01

    The Douglas Neumann method for low-speed potential flow on arbitrary three-dimensional lifting bodies was modified by substituting the combined source and doublet surface paneling based on Green's identity for the original source panels. Numerical studies show improved accuracy and stability for thin lifting surfaces, permitting reduced panel number for high-lift devices and supercritical airfoil sections. The accuracy of flow in concave corners is improved. A method of airfoil section design for a given pressure distribution, based on Green's identity, was demonstrated. The program uses panels on the body surface with constant source strength and parabolic distribution of doublet strength, and a doublet sheet on the wake. The program is written for the CDC CYBER 175 computer. Results of calculations are presented for isolated bodies, wings, wing-body combinations, and internal flow.

  2. Reflexionseigenschaften von Windenergieanlagen im Funkfeld von Funknavigations- und Radarsystemen

    NASA Astrophysics Data System (ADS)

    Sandmann, S.; Divanbeigi, S.; Garbe, H.

    2015-11-01

    Die hier behandelte Untersuchung befasst sich mit den Störungen des elektrischen Feldes einer Doppler Very High Frequency Omnidirectional Radio Range Navigationsanlage (DVOR) in der Gegenwart von Windenergieanlagen (WEA). Hierfür wird die Feldstärke auf 25 konzentrischen Kreisbahnen, sog. Orbit Flights verschiedener Höhen und mit verschiedenen Radien rund um die DVOR-Anlage numerisch simuliert. Insbesondere werden die Einflüsse diverser Parameter der WEA wie deren Anzahl, Position, Rotorwinkel, Turmhöhe und Rotordurchmesser auf die Feldverteilung herausgestellt, sowie die Anwendbarkeit der Simulationsmethode Physical Optics (PO) durch Vergleich der Simulationsergebnisse mit denen der Multi Level Fast Multipol Method (MLFMM) untersucht.

  3. Obituary: John W. Firor (1927-2007)

    NASA Astrophysics Data System (ADS)

    Gilman, Peter A.

    2009-12-01

    John W. Firor, a former Director of the High Altitude Observatory and the National Center for Atmospheric Research, and a founder of the Solar Physics Division of the American Astronomical Society, died of Alzheimer's disease in Pullman, Washington on November 5, 2007, he was 80. He was born in Athens Georgia on October 18, 1927, where his father was a professor of agricultural economics. John had an unusually diverse scientific career. His interest in physics and astrophysics began while serving in the army, during which time he was assigned to the Los Alamos National Laboratory, where he guarded highly radioactive materials (many have heard him describe how informal the protections were compared to later times). After his service he returned to college and graduated in physics from Georgia Tech in 1949. He received his Ph.D. from the University of Chicago in 1954, writing his thesis on cosmic rays under John Simpson. John Firor would later remark that: "If you needed cosmic rays to actually do anything, you are sunk." That thought, partly in jest, may help explain his motivation for moving to so many new scientific and management pursuits. John moved from cosmic ray physics to radio astronomy (particularly of the Sun) when he began work at the Carnegie Institution of Washington's Department of Terrestrial Magnetism, where he remained until 1961. During this time, he met Walter Orr Roberts, then the Director of the High Altitude Observatory (HAO) in Boulder, Colorado. HAO was then affiliated with the University of Colorado. In 1959, a movement began to upgrade the atmospheric sciences in the United States by establishing a National Center, where the largest, most important atmospheric research problems could be addressed. Roberts became the first Director of NCAR, as well as the first president of the University Corporation for Atmospheric Research (UCAR), the consortium of universities that was commissioned to manage and staff the new Center. HAO became a

  4. Development of an immersed boundary-phase field-lattice Boltzmann method for Neumann boundary condition to study contact line dynamics

    NASA Astrophysics Data System (ADS)

    Shao, J. Y.; Shu, C.; Chew, Y. T.

    2013-02-01

    The implementation of Neumann boundary condition in the framework of immersed boundary method (IBM) is presented in this paper to simulate contact line dynamics using a phase field-lattice Boltzmann method. Immersed boundary method [10] is known as an efficient algorithm for modelling fluid-solid interaction. Abundance of prominent works have been devoted to refine IBM [1,11,12]. However, they are mainly restricted to problems with Dirichlet boundary condition. Research that implements the Neumann boundary condition in IBM is very limited to the best of our knowledge. This deficiency significantly limits the application of IBM in computational fluid dynamics (CFD) since physical phenomena associated with Neumann boundary conditions are extremely diverse. The difficulty is attributed to the fact that implementation of Neumann boundary condition is much more complex than that of Dirichlet boundary condition. In the present work, we initiate the first endeavour to implement Neumann boundary condition in IBM with assistance of its physical interpretation rather than simple mathematical manipulation. Concretely speaking, rooted from physical conservation law, the Neumann boundary condition is considered as contribution of flux from the boundary to its relevant physical parameter in a control volume. Moreover, the link between the flux and its corresponding flow field variable is directly manipulated through the immersed boundary concept. In this way, the Neumann boundary conditions can be implemented in IBM. The developed method is applied together with phase field-lattice Boltzmann method to study contact line dynamics. The phase field method [27,39], which becomes increasingly popular in multiphase flow simulation, can efficiently capture complex interface topology and naturally resolve the contact line singularity. Meanwhile, the lattice Boltzmann method is known as an alternative to model fluid dynamics and holds good prospect to simulate multiphase flows with

  5. A New Reading of Shakespeare's King John.

    NASA Astrophysics Data System (ADS)

    Usher, Peter D.

    1995-12-01

    Shakespeare wrote King John c.1594, six years after the defeat of the Spanish Armada, and ~ 50 years after publication of the Copernican heliocentric hypothesis. It is said to be the most unhistorical of the History Plays, ``anomalous'', ``puzzling'', and ``odd'', and as such it has engendered far more than the customary range of interpretive opinion. I suggest that the play alerts Elizabethans not just to military and political threats, but to a changing cosmic world view, all especially threatening as they arise in Catholic countries. (a) Personification characterizes the play. John personifies the old order, while Arthur and the Dauphin's armies personify the new. I suggest that Shakespeare decenters King John just as Copernicus decentered the world. (b) Hubert menaces Arthur's eyes for a whole scene (4.1), but the need for such cruelty is not explained and is especially odd as Arthur is already under sentence of death (3.3.65-66). This hitherto unexplained anomaly suggests that the old order fears what the new might see. (c) Eleanor's confession is made only to Heaven and to her son the King (1.1.42-43), yet by echoing and word play the Messenger from France later reveals to John that he is privy to it (4.2.119-124). This circumstance has not been questioned heretofore. I suggest that the Messenger is like the wily Hermes (Mercury), chief communicator of the gods and patron of the sciences; by revealing that he moves in the highest circles, he tells John that he speaks with an authority that transcends even that of a king. The message from on high presages more than political change; it warns of a new cosmic and religious world order (d) Most agree that John is a weak king, so Shakespeare must have suspected flaws in the old ways. He would have known that Tycho Brahe's new star of 1572, the comet of 1577, and the 1576 model of his compatriot Thomas Digges, were shattering old ideas. (e) The tensions of the play are not resolved because in 1594 the new order was

  6. Dr. Wernher Von Braun greeting dignitaries.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun, left, greets vice president Spiro T. Agnew in the Launch Control Center for the Apollo 14 mission. Between Dr. Von Braun and Mr. Agnew are their Royal Highnesses, The Prince and Princess of Spain. The royal visitors greeted the launch control team in th enter after the launch of Apollo 14.

  7. Dr. Wernher Von Braun at a picnic.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun, director of the Marshall Space Flight Center, stakes claim to a table for the picnic celebrating man's first lunar landing. With Dr. Von Braun are his wife, Maria (seated, right), and son, Peter (back to camera). His daughter, Margrit, was also present, but is hidden from view by friends in this view.

  8. Walt Disney and Dr. Wernher von Braun

    NASA Technical Reports Server (NTRS)

    1954-01-01

    Dr. Werhner von Braun, then Chief, Guided Missile Development Operation Division at Army Ballistic Missile Agency (ABMA) in Redstone Arsenal, Alabama, was visited by Walt Disney in 1954. In the 1950's, von Braun worked with Disney Studio as a technical director, making three films about space exploration for television. A model of the V-2 rocket is in background.

  9. Ludwig von Mises: An Annotated Bibliography.

    ERIC Educational Resources Information Center

    Gordon, David

    A 117-item annotated bibliography of books, articles, essays, lectures, and reviews by economist Ludwig von Mises is presented. The bibliography is arranged chronologicaly, and is followed by an alphabetical listing of the citations, excluding books. An index and information on the Ludwig von Mises Institute at Auburn University (Alabama) are…

  10. John Holt Stanway: Gone to Texas

    NASA Astrophysics Data System (ADS)

    Bryan, J.

    2008-01-01

    John Holt Stanway (1799Ð1872) was an amateur astronomer who lived in Manchester, England until 1845. He was in contact with the English Ôgrand amateurÕ astronomer, William Henry Smyth, who supported him for Fellowship of the Royal Astronomical Society and evidently advised him on how to build and equip an observatory. Apparently, Stanway had an observatory at Chorlton-cum-Hardy in 1837. In 1845, Stanway left for the United States in response to serious business problems. En route, he met Ashbel Smith, a representative of the government of the Republic of Texas, who convinced Stanway to go to Texas. There he changed his name to John H. Smythe Stanley and settled in Houston, where he re-established his observatory. He became a commercial photographer and wrote about astronomy and other scientific subjects in Houston newspapers until his death in 1872.

  11. John Banister: an Elizabethan surgeon in Brazil.

    PubMed

    Mello, Amílcar D'Avila de

    2011-03-01

    In Brazil's sixteenth-century history, very few references are made to health professionals. On the expedition of Edward Fenton, dispatched by the English Crown in 1582 to set up a trading post in Asia, was the famous barber-surgeon and physician John Banister. The naval squadron, diverted from its original route to repeat the feats of Sir Francis Drake, stopped over in Africa, crossed the Atlantic and anchored off the Santa Catarina coast in Brazil. In these waters, the expedition degenerated into piracy and returned unsuccessful to Europe. John Banister is considered the person who liberated English anatomy from mediaeval slavery, shedding upon it the light of the Renaissance. It was the first time that anyone of this importance in the area of health had visited these latitudes.

  12. Dr. Wernher von Braun Laid to Rest

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Dr. Wernher von Braun served as Marshall Space Flight Center's first director from July 1, 1960 until January 27, 1970, when he was appointed NASA Deputy Associate Administrator for Planning. Following World War II, Dr. von Braun and his German colleagues arrived in the United States under Project Paper Clip to continue their rocket development work. In 1950, von Braun and his rocket team were transferred from Ft. Bliss, Texas to Huntsville, Alabama to work for the Army's rocket program at Redstone Arsenal and later, NASA's Marshall Space Flight Center. Under von Braun's leadership, Marshall developed the Saturn V launch vehicle which took Apollo astronauts to the moon. Dr. von Braun died in Alexandria, Va., on June 16, 1977, seven years after his NASA appointment. This photo was taken at the site where he was laid to rest.

  13. Dr. Wernher von Braun In His Office

    NASA Technical Reports Server (NTRS)

    1964-01-01

    Dr. Wernher von Braun served as Marshall Space Flight Center's first director from July 1, 1960 until January 27, 1970, when he was appointed NASA Deputy Associate Administrator for Planning. Following World War II, Dr. von Braun and his German colleagues arrived in the United States under Project Paperclip to continue their rocket development work. In 1950, von Braun and his rocket team were transferred from Ft. Bliss, Texas to Huntsville, Alabama to work for the Army's rocket program at Redstone Arsenal and later, NASA's Marshall Space Flight Center. Under von Braun's leadership, Marshall developed the Saturn V launch vehicle which took Apollo astronauts to the moon. This photo depicts von Braun in his office at MSFC.

  14. John N. Brady (1952-2009): a Generous Spirit

    PubMed Central

    Enquist, Lynn W.

    2009-01-01

    John N. Brady, Chief of the Virus Tumor Biology Section of the Laboratory of Cellular Oncology, National Institutes of Health, died of cancer on 27 April 2009. John was a stellar member of the virology community. He was a longtime Journal of Virology reviewer and a member of the editorial board. He will be missed. Fatah Kashanchi of the George Washington University Medical Center has written John's memorial. Fatah worked with John at the NIH and published more than 30 papers with him. Fatah thanks all the people who contributed to John's obituary, including Kuan-Teh Jeang, Lou Laimins, Mary Loeken, Renaud Mehieux, Paul Lambert, Graziella Piras, Scott Gitlin, Paul Lindholm, Nadia Rosenthal, Sergi Nekhai, Brian Wigdahl, David Price, Susan J. Marriott, Cynthia Masison, Jurgen Dittmer, Eric Verdin, Bassel E. Sawaya, and John's longtime assistants Janet Duvall Grimm and Michael Radonovich, who gave immense support to all the individuals who went through John's lab. PMID:19474098

  15. Astronaut John Young photographed collecting lunar samples

    NASA Technical Reports Server (NTRS)

    1972-01-01

    Astronaut John W. Young, commander of the Apollo 16 lunar landing mission, is photographed collecting lunar samples near North Ray crater during the third Apollo 16 extravehicular activity (EVA-3) at the Descartes landing site. This picture was taken by Astronaut Charles M. Duke Jr., lunar module pilot. Young is using the lunar surface rake and a set of tongs. The Lunar Roving Vehicle is parked in the field of large boulders in the background.

  16. John Greenwood, dentist to President Washington.

    PubMed

    Ring, Malvin E

    2010-12-01

    In the practice of dentistry in colonial times, no name shines more brightly than that of John Greenwood, the favorite dentist of President George Washington. But it is more than this alone that brings luster to his name and renown. A study of the advertisements he placed in newspapers in Massachusetts and New York gives us an insight into his treatments and his mode of practice. A newly discovered advertisement adds to our knowledge of this remarkable practitioner. PMID:21261186

  17. John Wesley Powell: soldier, explorer, scientist

    USGS Publications Warehouse

    ,

    1969-01-01

    One hundred years ago John Wesley Powell and nine adventure-seeking companions completed the first exploration of the dangerous and almost uncharted canyons of the Green and Colorado Rivers. By this trip, Powell, a 35-year old teacher of natural history, apparently unhampered by the lack of his right forearm (amputated after the Battle of Shiloh) opened up a large unknown part of continental United States and brought to a climax the era of western exploration.

  18. Astronaut John Young displays drawing of Snoopy

    NASA Technical Reports Server (NTRS)

    1969-01-01

    Astronaut John W. Young, Apollo 10 command module pilot, displays drawing of Snoopy in this color reproduction taken from the fourth telecast made by the color television camera aboard the Apollo 10 spacecraft. When this picture was made the Apollo 10 spacecraft was about half-way to the moon, or approximately 112,000 nautical miles from the earth. Snoopy will be the code name of the Lunar Module (LM) during Apollo 10 operations when the LM and CM are separated.

  19. The dental health of President John Adams.

    PubMed

    Ring, Malvin E

    2004-01-01

    The oral health of George Washington has been widely studied and written about. Not so, however, with our second president, John Adams, whose dental health was apparently poor throughout his life. His pernicious habit of inducing vomiting to treat various bodily ills, coupled with a great love of sweets, led to the loss of his teeth, which he stubbornly refused to replace with dentures. When he was older, this led to his speech being so badly affected, that he could barely be understood.

  20. John Dewey's Visits to Hawai'i

    ERIC Educational Resources Information Center

    McEwan, Hunter

    2015-01-01

    John Dewey visited Hawai'i on three separate occasions. Of all three trips, by far the most important, as far as Dewey's influence on education in Hawai'i is concerned, was in 1899 when he came with his wife, Alice Chipman Dewey, to help launch the University Extension program in Honolulu. The Deweys' second trip was a very brief one--twenty years…

  1. John Marshall: the making of true spectacles.

    PubMed Central

    Bryden, D. J.; Simms, D. L.

    1994-01-01

    In 1693 John Marshall of London devised a novel method of grinding batches of identical, good quality, lenses of a specified focal length. Its commendation by the Royal Society led to a trade war between Marshall and rivals in the Worshipful Company of Spectacle Makers. Despite initial opposition the method was rapidly adopted by London opticians and, though much modified, it forms the unrecognised basis of present day practice. Images p1714-a PMID:7819998

  2. The mystery of John Wilkes Booth's dentist.

    PubMed

    Hyson, J M; Kauffman, M W

    1999-11-01

    For many years there has been much speculation over the identity of the dentist of President Abraham Lincoln's assassin, John Wilkes Booth. Some have considered Dr. William Merrill (1833-1918), a rather prominent Washington, D.C. dentist, as the man who restored two of Booth's teeth with gold a few days before the assassination. Who was the mysterious Dr. Merrill and what evidence do we have that he ever treated Booth? PMID:10726569

  3. How security is changing at John Hopkins.

    PubMed

    McLean, W

    1993-10-01

    William McLean, CHPA, is security director at Johns Hopkins Medical Institutions, Baltimore, MD. Formerly chief of security with the Baltimore City Department of Hospitals, McLean has worked in health care security at the director level for 15 years. He also spent eight years with the Baltimore City Police Department. At Hopkins, officials recently decided to overhaul the $7 million security operation because of increasing crime. In this interview, McLean talks about some of the changes.

  4. John A. Simpson (1916-2000)

    NASA Astrophysics Data System (ADS)

    John A. Simpson, recipient of the 2000 William Bowie Medal, died August 31 in Chicago at the age of 83. Dr. Simpson, who became an AGU member in 1957 and a Fellow in 1962, spent most of his professional career with the Enrico Fermi Institute for Nuclear Studies of the University of Chicago, and at that university's department of physics. He was a member of the Solar and Heliospheric Physics subsection of SPA.

  5. An Alternative to Von Glasersfeld's Subjectivism in Science Education: Deweyan Social Constructivism

    NASA Astrophysics Data System (ADS)

    Garrison, Jim

    An influential view of constructivism in science and mathematics educational research and practice is that of Ernst von Glasersfeld. It is a peculiarly subjectivist form of constructivism that should not be attractive to science and mathematics educators concerned with retaining some sort of realism that leaves room for objectivity. The subjectivist constructivism of von Glasersfeld also becomes entangled in untenable mind/body and subject/object dualisms. Finally, these dualisms are unnecessary for social constructivism. I will provide one example of a social constructivist alternative to social constructivism, that of the pragmatic philosopher JohnDewey. In presenting Deweys position I will appeal to Ockhams razor, that is, the admonition not to multiply entities beyond necessity, to shave off the needless mentalistic and psychic entities that lead von Glasersfeld into his subjectivism and dualism.In outward forms, experimental science is infinitely varied. In principle, it is simple. We know an object when we knowhow it is made, and we know how it is made in the degree in which we ourselves make it.

  6. Obituary: John Daniel Kraus, 1910-2004

    NASA Astrophysics Data System (ADS)

    Kraus, John D., Jr.; Marhefka, Ronald J.

    2005-12-01

    John Daniel Kraus, 94, of Delaware, Ohio, director of the Ohio State University "Big Ear" Radio Observatory, physicist, inventor, and environmentalist died 18 July 2004 at his home in Delaware, Ohio. He was born on 28 June 1910 in Ann Arbor, Michigan. He received a Bachelor of Science in 1930, a Master of Science in 1931, and a PhD in physics in 1933 (at 23 years of age), all from the University of Michigan, Ann Arbor. During the 1930s at Michigan, he was involved in physics projects, antenna consulting, and in atomic-particle-accelerator research using the University of Michigan's premier cyclotron. Throughout the late 1920s and the 1930s, John was an avid radio amateur with call sign W8JK. He was back on the air in the 1970s. In 2001 the amateur radio magazine CQ named him to the inaugural class of its Amateur Radio Hall of Fame. He developed many widely used innovative antennas. The "8JK closely spaced array" and the "corner reflector" were among his early designs. Edwin H. Armstrong wrote John in July 1941 indicating in part, "I have read with interest your article in the Proceedings of the Institute on the corner reflector...Please let me congratulate you on a very fine piece of work." Perhaps John's most famous invention, and a product of his intuitive reasoning process, is the helical antenna, widely used in space communications, on global positioning satellites, and for other applications. During World War II, John was in Washington, DC as a civilian scientist with the U.S. Navy responsible for "degaussing" the electromagnetic fields of steel ships to make them safe from magnetic mines. He also worked on radar countermeasures at Harvard University's Radio Research Laboratory. He received the U.S. Navy Meritorious Civilian Service Award for his war work. In 1946 he took a faculty position at Ohio State University, becoming professor in 1949, and retiring in 1980 as McDougal Professor Emeritus of Electrical Engineering and Astronomy. Even so, he never retired

  7. Bothriocroton oudemansi (Neumann, 1910) n. comb. (Acari: Ixodida: Ixodidae), an ectoparasite of the western long-beaked echidna in Papua New Guinea: redescription of the male and first description of the female and nymph.

    PubMed

    Beati, Lorenza; Keirans, James E; Durden, Lance A; Opiang, Muse D

    2008-03-01

    Specimens of Amblyomma oudemansi (Neumann, 1910) were collected in Papua New Guinea from an endangered monotreme, Zaglossus bruijni (Peters & Doria), the western long-beaked echidna. These ticks were compared morphologically and molecularly with species formerly assigned to Aponomma Neumann, 1899 (now included in Bothriocroton Keirans, King, & Sharrad, 1994 or Amblyomma Koch, 1844), and a phylogeny was generated. Based on our results, we reassign this tick to Bothriocroton, as B. oudemansi (Neumann, 1910) n. comb. Original descriptions are provided for the female and the nymph of this species and the male is redescribed. A revised list of all Bothriocroton records and holdings in the US National Tick Collection is also provided. PMID:18210218

  8. Obituary: John J. Hillman, 1938-2006

    NASA Astrophysics Data System (ADS)

    Chanover, Nancy

    2007-12-01

    John J. Hillman, a dedicated NASA civil servant, spectroscopist, astrophysicist, planetary scientist, and mentor, died on February 12, 2006 of ocular melanoma at his home in Columbia, Maryland. His professional and personal interests were wide-reaching and varied, and he devoted his career to the advancement of our understanding of the beauty and wonder in the world around us. His love of nature, art, and science made him a true Renaissance man. John was born in Fort Jay, New York, on November 22, 1938, and was raised in Washington, D.C. He received his B.S., M.S., and Ph.D. degrees in Physics from American University in 1967, 1970, and 1975, respectively. He began working at NASA's Goddard Space Flight Center, then in its infancy, in 1969, juggling a full-time position as a Research Physicist, the completion of his M.S. and Ph.D. degrees, and a young family. His background in molecular spectroscopy enabled him to apply his skills to numerous disciplines within NASA: infrared and radio astronomy; electronic, vibrational, and rotational structure of interstellar molecules; solar and stellar atmospheres; and planetary atmospheres. He published more than 70 journal papers in these disciplines. He was a frequent contributor to the Ohio State University International Symposium on Molecular Spectroscopy, and possessed a rare ability to bridge the gap between laboratory and remote sensing spectroscopy, bringing scientists from different disciplines together to understand our Universe. The last fifteen years of John's career were devoted to the development of acousto-optic tunable filter (AOTF) cameras. He championed this technology as a low-cost, low-power alternative to traditional imaging cameras for in situ or remotely sensed planetary exploration. It was within this context that I got to know John, and eventually worked closely with him on the demonstration and application of this technology for planetary science using ground-based telescopes in New Mexico, California

  9. Renaturierung und Management von Heiden

    NASA Astrophysics Data System (ADS)

    Härdtle, Werner; Assmann, Thorsten; van Diggelen, Rudy; von Oheimb, Goddert

    Heiden zählen zu den ältesten und besonders reizvollen Kulturlandschaften Nordwesteuropas. Sie sind bezeichnend für nährstoffarme Böden in wintermilden Gebieten mit hohen Sommerniederschlägen. Während Heiden vor wenigen Jahrhunderten noch weit verbreitet und für manche Landschaften sogar prägend waren, hat sich ihr Areal heute auf wenige, meist in Naturschutzgebieten gelegene Restbestände verkleinert. Zu diesem Rückgang haben maßgeblich Änderungen der Landnutzung, aber auch Nährstoffeinträge aus umgebenden Agrarflächen und atmogene Depositionen beigetragen. In den meisten Ländern der Europäischen Union sind Heiden heute gesetzlich geschützte Ökosysteme, da diese, neben ihrem Erholungswert für den Menschen, Pflanzen- und Tierarten beherbergen, die außerhalb von Heiden nicht oder kaum überlebensfähig sind.

  10. John Hughlings-Jackson: a sesquicentennial tribute.

    PubMed

    Swash, M

    1986-09-01

    One hundred and fifty years have elapsed since the birth of John Hughlings-Jackson, a pivotal figure in the development of clinical neuroscience. In this review the origin of Jackson's postulate of a hierarchical organisation of function in the nervous system is described in the context of his education and his contacts with contemporaries, both in his clinical practice at The London Hospital and at the National Hospital, Queen Square, and in relation to the evolutionary approach to the organisation and ideas on biology and society set out by the philosopher Herbert Spencer. PMID:3531410

  11. The healing philosopher: John Locke's medical ethics.

    PubMed

    Short, Bradford William

    2004-01-01

    This article examines a heretofore unexplored facet of John Locke's philosophy. Locke was a medical doctor and he also wrote about medical issues that are controversial today. Despite this, Locke's medical ethics has yet to be studied. An analysis of Locke's education and his teachers and colleagues in the medical profession, of the 17th century Hippocratic Oath, and of the reaction to the last recorded outbreak of the bubonic plague in London, shines some light on the subject of Locke's medical ethics. The study of Locke's medical ethics confirms that he was a deontologist who opposed all suicide and abortion through much of pregnancy.

  12. John Hughlings-Jackson: a sesquicentennial tribute.

    PubMed Central

    Swash, M

    1986-01-01

    One hundred and fifty years have elapsed since the birth of John Hughlings-Jackson, a pivotal figure in the development of clinical neuroscience. In this review the origin of Jackson's postulate of a hierarchical organisation of function in the nervous system is described in the context of his education and his contacts with contemporaries, both in his clinical practice at The London Hospital and at the National Hospital, Queen Square, and in relation to the evolutionary approach to the organisation and ideas on biology and society set out by the philosopher Herbert Spencer. Images PMID:3531410

  13. John Ray in Italy: lost manuscripts rediscovered

    PubMed Central

    Hunter, Michael

    2014-01-01

    This paper discloses the content of two manuscripts of John Ray that have hitherto been unknown to Ray scholars. The manuscripts survive in the Hampshire Record Office, having descended through the Prideaux-Brune family. They record information about Ray's tour of Italy in the 1660s that does not appear in his Observations … made in a journey through … the Low-countries, Germany, Italy and France (1673), including a visit to the museum of Athanasius Kircher in Rome, and provide clues concerning the composition of Ray's 1673 book. PMID:24921104

  14. Dedication: John W. Wright, 1929-1978

    NASA Astrophysics Data System (ADS)

    Wright, John W.

    1980-09-01

    The death of John W. Wright in an automobile accident on November 20, 1978, came as a great shock to all who knew him. His family and friends lost a stimulating, compassionate human being whose many-faceted personality they greatly admired. The scientific community working on remote sensing of the air-water interface lost one of its pioneers and leaders. To dedicate this issue of the Journal of Geophysical Research to Dr. Wright seems a fitting tribute to his many scientific achievements.

  15. John Hunter: the first surgical scientist.

    PubMed

    Maxwell, B

    1987-01-01

    John Hunter was a brilliant surgeon and teacher, the father of scientific surgery and surgical pathology and founder of the world-renowned Hunterian museum. This essay attempts to answer the following questions. Who was this man? How did he achieve such a remarkable station? Why was he loved by some yet detested by others? When did the poor student start to become the superb teacher? How did he manage to collect the thousands of specimens he left in his museum? What is it about Hunter that makes him so well remembered today, almost 200 years after his death?

  16. Obituary: John Daniel Kraus, 1910-2004

    NASA Astrophysics Data System (ADS)

    Kraus, John D., Jr.; Marhefka, Ronald J.

    2005-12-01

    John Daniel Kraus, 94, of Delaware, Ohio, director of the Ohio State University "Big Ear" Radio Observatory, physicist, inventor, and environmentalist died 18 July 2004 at his home in Delaware, Ohio. He was born on 28 June 1910 in Ann Arbor, Michigan. He received a Bachelor of Science in 1930, a Master of Science in 1931, and a PhD in physics in 1933 (at 23 years of age), all from the University of Michigan, Ann Arbor. During the 1930s at Michigan, he was involved in physics projects, antenna consulting, and in atomic-particle-accelerator research using the University of Michigan's premier cyclotron. Throughout the late 1920s and the 1930s, John was an avid radio amateur with call sign W8JK. He was back on the air in the 1970s. In 2001 the amateur radio magazine CQ named him to the inaugural class of its Amateur Radio Hall of Fame. He developed many widely used innovative antennas. The "8JK closely spaced array" and the "corner reflector" were among his early designs. Edwin H. Armstrong wrote John in July 1941 indicating in part, "I have read with interest your article in the Proceedings of the Institute on the corner reflector...Please let me congratulate you on a very fine piece of work." Perhaps John's most famous invention, and a product of his intuitive reasoning process, is the helical antenna, widely used in space communications, on global positioning satellites, and for other applications. During World War II, John was in Washington, DC as a civilian scientist with the U.S. Navy responsible for "degaussing" the electromagnetic fields of steel ships to make them safe from magnetic mines. He also worked on radar countermeasures at Harvard University's Radio Research Laboratory. He received the U.S. Navy Meritorious Civilian Service Award for his war work. In 1946 he took a faculty position at Ohio State University, becoming professor in 1949, and retiring in 1980 as McDougal Professor Emeritus of Electrical Engineering and Astronomy. Even so, he never retired

  17. John Hughlings-Jackson: a sesquicentennial tribute.

    PubMed

    Swash, M

    1986-09-01

    One hundred and fifty years have elapsed since the birth of John Hughlings-Jackson, a pivotal figure in the development of clinical neuroscience. In this review the origin of Jackson's postulate of a hierarchical organisation of function in the nervous system is described in the context of his education and his contacts with contemporaries, both in his clinical practice at The London Hospital and at the National Hospital, Queen Square, and in relation to the evolutionary approach to the organisation and ideas on biology and society set out by the philosopher Herbert Spencer.

  18. The chemistry of John Dalton's color blindness.

    PubMed

    Hunt, D M; Dulai, K S; Bowmaker, J K; Mollon, J D

    1995-02-17

    John Dalton described his own color blindness in 1794. In common with his brother, he confused scarlet with green and pink with blue. Dalton supposed that his vitreous humor was tinted blue, selectively absorbing longer wavelengths. He instructed that his eyes should be examined after his death, but the examination revealed that the humors were perfectly clear. In experiments presented here, DNA extracted from his preserved eye tissue showed that Dalton was a deuteranope, lacking the middlewave photopigment of the retina. This diagnosis is shown to be compatible with the historical record of his phenotype, although it contradicts Thomas Young's belief that Dalton was a protanope.

  19. Dirichlet-to-Neumann maps, abstract Weyl-Titchmarsh M-functions, and a generalized index of unbounded meromorphic operator-valued functions

    NASA Astrophysics Data System (ADS)

    Behrndt, Jussi; Gesztesy, Fritz; Holden, Helge; Nichols, Roger

    2016-09-01

    We introduce a generalized index for certain meromorphic, unbounded, operator-valued functions. The class of functions is chosen such that energy parameter dependent Dirichlet-to-Neumann maps associated to uniformly elliptic partial differential operators, particularly, non-self-adjoint Schrödinger operators, on bounded Lipschitz domains, and abstract operator-valued Weyl-Titchmarsh M-functions and Donoghue-type M-functions corresponding to closed extensions of symmetric operators belong to it. The principal purpose of this paper is to prove index formulas that relate the difference of the algebraic multiplicities of the discrete eigenvalues of Robin realizations of non-self-adjoint Schrödinger operators, and more abstract pairs of closed operators in Hilbert spaces with the generalized index of the corresponding energy dependent Dirichlet-to-Neumann maps and abstract Weyl-Titchmarsh M-functions, respectively.

  20. Wally Schirra Greets Dr. Wernher von Braun

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Apollo 7 Commander Walter M. Schirra, Jr., left, greets Dr. Wernher Von Braun, Director, Marshall Space Flight Center and Dr. Kurt Debus, Right, KSC Director, during a prelaunch mission briefing held at the Florida Spaceport.

  1. Von Hippel-Lindau Disease (VHL)

    MedlinePlus

    ... Funding Information Research Programs Training & Career Awards Enhancing Diversity Find People About NINDS NINDS Von Hippel-Lindau ... News From NINDS | Find People | Training | Research | Enhancing Diversity Careers@NINDS | FOIA | Accessibility Policy | Contact Us | Privacy ...

  2. 5. Historic American Buildings Survey, John Jennings, Photographer February 16, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey, John Jennings, Photographer February 16, 1935 BALCONY, SEATING ARRANGEMENT, SOUTH WALL. - Hanover Green Meetinghouse, Nanticoke vicinity, Hanover Green, Luzerne County, PA

  3. 4. Historic American Buildings Survey, John Jennings, Photographer February 16, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey, John Jennings, Photographer February 16, 1935 GROUND FLOOR, SEATING ARRANGEMENT & STAIRWAY. - Hanover Green Meetinghouse, Nanticoke vicinity, Hanover Green, Luzerne County, PA

  4. Dr. von Braun With German Rocket Experimenters

    NASA Technical Reports Server (NTRS)

    1930-01-01

    Dr. von Braun was among a famous group of rocket experimenters in Germany in the 1930s. This photograph is believed to be made on the occasion of Herman Oberth's Kegelduese liquid rocket engine being certified as to performance during firing. From left to right are R. Nebel, Dr. Ritter, Mr. Baermueller, Kurt Heinish, Herman Oberth, Klaus Riedel, Wernher von Braun, and an unidentified person.

  5. The Trieste Lecture of John Stewart Bell

    NASA Astrophysics Data System (ADS)

    Bassi, Angelo; Carlo Ghirardi, Gian

    2007-03-01

    Delivered at Trieste on the occasion of the 25th Anniversary of the International Centre for Theoretical Physics, 2 November 1989 The video of this lecture is available here. Please see the PDF for the transcript of the lecture. General remarks by Angelo Bassi and GianCarlo Ghirardi During the autumn of 1989 the International Centre for Theoretical Physics, Trieste, celebrated the 25th anniversary of its creation. Among the many prestigious speakers, who delivered extremely interesting lectures on that occasion, was the late John Stewart Bell. All lectures have been recorded on tape. We succeeded in getting a copy of John's lecture. In the lecture, many of the arguments that John had lucidly stressed in his writings appear once more, but there are also extremely interesting new remarks which, to our knowledge, have not been presented elsewhere. In particular he decided, as pointed out by the very choice of the title of his lecture, to call attention to the fact that the theory presents two types of difficulties, which Dirac classified as first and second class. The former are those connected with the so-called macro-objectification problem, the latter with the divergences characterizing relativistic quantum field theories. Bell describes the precise position of Dirac on these problems and he stresses appropriately how, contrary to Dirac's hopes, the steps which have led to a partial overcoming of the second class difficulties have not helped in any way whatsoever to overcome those of the first class. He then proceeds to analyse the origin and development of the Dynamical Reduction Program and draws attention to the problems that still affect it, in particular that of a consistent relativistic generalization. When the two meetings Are there quantum jumps? and On the present status of Quantum Mechanics were organized in Trieste and Losinj (Croatia), on 5 10 September 2005, it occurred to us that this lecture, which has never been published, might represent an

  6. John Lubbock, science, and the liberal intellectual

    PubMed Central

    Clark, J. F. M.

    2014-01-01

    John Lubbock's longest-standing scientific research interest was entomology. Some of his earliest systematic investigations of insect and marine life began under the tutelage of Darwin. Darwin shaped the trajectory of, and the programme for, Lubbock's natural history work. However, to understand John Lubbock's identity as a scientist, he must be located within the context of the Victorian ‘intellectual’. This paper traces Lubbock's entomological work from its early development under Darwin to his later work on insect sensory physiology and comparative psychology. Far from being the death of his scientific career, Lubbock's entry into Parliament marked the pinnacle of his career as a scientific intellectual. He built on his early work on invertebrate anatomy, physiology and taxonomy, and on his archaeological and anthropological research to expound his vision of mental evolution. His research on ‘savages’, on ants, bees and wasps, and on his dog, ‘Van’, permitted him to expatiate upon the psychic unity of all sentient beings, which, in turn, underpinned his overarching educational programme.

  7. Renaturierung von Tagebaufolgeflächen

    NASA Astrophysics Data System (ADS)

    Tischew, Sabine

    Der Abbau von Rohstoffen im Tagebauverfahren bedingt einen tief greifenden Landschafts- und Strukturwandel in den betroffenen Regionen. In der Abbauphase hat vor allem der Braunkohleabbau mit den tagebauübergreifenden Grundwasserabsenkungstrichtern, der Zerstörung oder Beeinträchtigung von ausgedehnten naturnahen Auenökosystemen sowie Wäldern und Elementen der Kulturlandschaft aus der Sicht des Naturschutzes überwiegend negative landschaftsökologische Folgen. Vor allem der Eingriff in Ökosysteme mit langen Entwicklungszeiten (alte Wälder, Moore) oder in die Dynamik von Auensystemen ist nicht oder nur in sehr langen Zeiträumen wieder ausgleichbar. Für letztere ist auch langfristig die Durchgängigkeit für viele Tierarten (Arten der Fließgewässer) nicht wieder vollständig herstellbar. Oft ist es zudem schwierig, traditionelle Landnutzungen (z. B. Wanderschäferei, Nutzung von Streuobstwiesen) nach der langen Abbauphase wieder aufzugreifen. Es ist deshalb eine wichtige Aufgabe, nach dem Abbauprozess auf der Grundlage der vorhandenen Potenziale eine nachhaltige Entwicklung der Bergbaufolgelandschaft zu unterstützen und von den Betreibern des Abbaus und von den Sanierungsgesellschaften auch einzufordern (z. B. Bauer 1998).

  8. Familiar-Strange: Teaching the Scripture as John Would Teach

    ERIC Educational Resources Information Center

    Ha, Tung-Chiew

    2014-01-01

    The Gospel of John teaches through telling the story of Jesus in light of the familiar Hebrew faith stories. It is an interpretive task that presents Jesus to his audience and teaches them adequate faith. John the Teacher skillfully uses narrative skills to create the familiar-strange effect in his storytelling. Each story is followed by a…

  9. Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John F. Kennedy Space Center, Florida. Drawing 79K00088, John F. Kennedy Space Center, November 1969. SYS FUNCTIONAL DRAWING. Sheet 5 - Cape Canaveral Air Force Station, Launch Complex 39, Crawler Transporters, Launcher Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  10. Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John F. Kennedy Space Center, Florida. Drawing 79K00081, John F. Kennedy Space Center, December 1969. SYS FUNCTIONAL DRAWING. Sheet 3 - Cape Canaveral Air Force Station, Launch Complex 39, Crawler Transporters, Launcher Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  11. Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of drawing. LAUNCH COMPLEX 39, CRAWLER TRANSPORTER. NASA, John F. Kennedy Space Center, Florida. Drawing 79K00088, John F. Kennedy Space Center, November 1969. SYS FUNCTIONAL DRAWING. Sheet 6 - Cape Canaveral Air Force Station, Launch Complex 39, Crawler Transporters, Launcher Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  12. 67. Historic American Buildings Survey John Oliver Brostrup, Photographer August ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    67. Historic American Buildings Survey John Oliver Brostrup, Photographer August 12,1936 1:35 P. M. VIEW OF C.C.C. BOYS SCREENING FOR ARTIFACTS. - General John Mason House, Analostan Island or Theodore Roosevelt Island, Washington, District of Columbia, DC

  13. 71. Historic American Buildings Survey John O. Brostrup, Photographer August ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    71. Historic American Buildings Survey John O. Brostrup, Photographer August 12, 1936 1:30 P. M. VIEW OF C.C.C. BOYS EXCAVATING IN UNIT A. - General John Mason House, Analostan Island or Theodore Roosevelt Island, Washington, District of Columbia, DC

  14. In memoriam - John M. Young (1942-2013)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    It is with sadness that friends and colleagues of John Young learnt of his death at home in Auckland, New Zealand on 30th September 2013. John began his scientific career at the Plant Diseases Division (PDD) of the Department of Scientific and Industrial Research (DSIR), New Zealand after completing...

  15. Tribes of Men: John Joseph Mathews and Indian Internationalism

    ERIC Educational Resources Information Center

    Lutenski, Emily

    2012-01-01

    In this article, the author discusses John Joseph Mathews and Indian internationalism. As an old man, Osage intellectual, writer, and historian, John Joseph Mathews recalled his expatriation from the United States during the 1920s. After growing up in Pawhuska, Oklahoma, seat of the Osage Nation, where he had been born in 1894 to a white mother…

  16. 40. Historic American Buildings Survey John O. Brostrup, Photographer August ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    40. Historic American Buildings Survey John O. Brostrup, Photographer August 13, 1936 1:50 P. M. DETAIL OF SOUTH WALL-CENTRAL ROOM OF BASEMENT-UNIT B-AFTER CHALKING - General John Mason House, Analostan Island or Theodore Roosevelt Island, Washington, District of Columbia, DC

  17. 39. Historic American Buildings Survey John O. Brostrup, Photographer August ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. Historic American Buildings Survey John O. Brostrup, Photographer August 13, 1936 1:30 P. M. DETAIL OF SOUTH WALL-CENTRAL ROOM OF BASEMENT-UNIT B-BEFORE CHALKING. - General John Mason House, Analostan Island or Theodore Roosevelt Island, Washington, District of Columbia, DC

  18. John Dewey's Experiential Theories and Leadership Preparation in Higher Education

    ERIC Educational Resources Information Center

    Berman, Larry A.

    2013-01-01

    The purpose of this study was to investigate the degree to which John Dewey's experiential theories were embedded in leadership preparation curricula in departments of leadership and college student personnel administration at universities in the Midwestern United States. John Dewey, who is considered to be America's greatest philosopher, defined…

  19. 77 FR 27766 - Jamar, John P.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-11

    ... Energy Regulatory Commission Jamar, John P.; Notice of Filing Take notice that on May 3, 2012, John P...-8659. Comment Date: 5 p.m. Eastern Time on May 24, 2012. Dated: May 4, 2012. Kimberly D. Bose, Secretary. BILLING CODE 6717-01-P...

  20. Chemistry of St. John's Wort: Hypericin and Hyperforin

    ERIC Educational Resources Information Center

    Vollmer, John J.; Rosenson, Jon

    2004-01-01

    The appeal as natural antidepressant is the major selling point of St. John's Wort, which is referred to as "Prozac from the plant kingdom". Hypericin and hyperforin, two major constituents with significant biological activity of St. John's Wort and which are complex molecules with unusual features, are examined.

  1. A Lifetime of Service: Dr. John Arthur Henschke

    ERIC Educational Resources Information Center

    Cooper, Mary

    2008-01-01

    John Henschke is a lifelong learner who studied with Malcolm Knowles and who interviewed and knew such adult educators as Cyril Houle and his contemporaries. John has devoted his life to service both in the ministry and in education; he has traveled the globe with a view to encouraging lifelong learning and the concepts of andragogy for all. His…

  2. 13. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. John and James Dobson Carpet Mill, East and West parcels, site plan-upper left, elevation-upper right, and survey-below, 1885. Hexamer, Ernest and Son. Hexamer General Surveys, 1867-1895, Philadelphia, Pennsylvania: E. Hexamer and Son, 1885, pp. 1890-1891. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  3. 10. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. John and James Dobson Carpet Mill, East and West parcels, site plan-lower right, and surrounding environs, 1875. Hopkins, Griffith Morgan. City Atlas of Philadelphia by Wards, 7 vols., Philadelphia, Pennsylvania: G. M. Hopkins and Co., 1875, pp. 46-47. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  4. 18. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. John and James Dobson Carpet Mill, East and West parcels, site plan-lower left, and surrounding environs, 1925. Bromley, George Washington and Bromley, Walter Scott. Atlas of the City of Philadelphia (North Philadelphia), Philadelphia, Pennsylvania: George W. and Walter S. Bromley, 1925, p. 106. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  5. 15. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. John and James Dobson Carpet Mill, East and West parcels, site plan-lower right, and surrounding environs, 1901. Baist, George William. Northern District of Baist's Detail Property Atlases of the City of Philadelphia, Pennsylvania, 7 vols., Philadelphia, Pennsylvania: G. W. Bromley and Co., 1901, Plan 17. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  6. 19. John and James Dobson Carpet Mills, West parcel, topographical ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. John and James Dobson Carpet Mills, West parcel, topographical plan, 1986. Barton and Martin, Engineers. 'Topographical Plan for Dobson Mills.' Prepared for Rouse Urban Housing, Inc., Philadelphia, Pennsylvania, 1986. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  7. 11. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. John and James Dobson Carpet Mill, East and West parcels, site plan-upper left, elevation-lower left, and survey-right, 1877. Hexamer, Ernest and Son. Hexamer General Surveys, 1867-1895, Philadelphia, Pennsylvania: E. Hexamer and Son, 1877, pp. 1095-1096. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  8. 17. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. John and James Dobson Carpet Mill, East and West Parcels, site plan, revised through 1914. Hexamer, Ernest and Son. Insurance Maps of the City of Philadelphia, Vol. 21., Philadelphia, Pennsylvania: E. Hexamer and Son, 1893. Revisions, 1914, p. 446. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  9. 8. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. John and James Dobson Carpet Mill, East and West Parcels, site plan, and survey lower left, 1865. Hexamer, Ernest and Son. Hexamer General Surveys, 1867-1895, Philadelphia, Pennsylvania: E. Hexamer and Son, 1865, p. 279. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  10. 9. John and James Dobson Carpet Mill, portion of West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. John and James Dobson Carpet Mill, portion of West parcel, site plan-left, elevation-upper right, and survey-lower right, 1873. Hexamer, Ernest and Son. Hexamer General Surveys 1867-1895, Philadelphia, Pennsylvania: E. Hexamer and Son, 1873, pp. 670-671. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  11. 14. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. John and James Dobson Carpet Mill, East and West parcels, site plan, revised through 1895. Hexamer, Ernest and Son. Insurance Maps of the City of Philadelphia, Vol. 21., Philadelphia, Pennsylvania: E. Hexamer and Son, 1893. Revisions, 1895, p. 446. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  12. 12. John and James Dobson Carpet Mill, West Parcel, site ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. John and James Dobson Carpet Mill, West Parcel, site plan-upper right, and surrounding environs, 1884. Hopkins, Griffith Morgan. City Atlas of Philadelphia by Wards, 7 vols., Philadelphia, Pennsylvania: G. M. Hopkins and Co., 1884, Plate 9. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  13. 16. John and James Dobson Carpet Mill, East and West ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. John and James Dobson Carpet Mill, East and West parcels, site plan-right, and western environs, 1908. Smith, Elvino Victor. Atlas of the 38th and Part of the 37th Ward of the City of Philadelphia, Philadelphia, Pennsylvania: Elvino V. Smith, 1908, Plate 24. - John & James Dobson Carpet Mill (West Parcel), 4041-4055 Ridge Avenue, Philadelphia, Philadelphia County, PA

  14. 76 FR 39867 - Russell, John G.; Notice of Filing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-07

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Russell, John G.; Notice of Filing Take notice that on June 29, 2011, John G. Russell submitted for filing, an application for authority to hold interlocking positions, pursuant...

  15. Celebrating the Life and Legacy of Dr. John Hope Franklin

    ERIC Educational Resources Information Center

    Harris, Robert L., Jr.; Levering-Lewis, David; French, John D.; Wharton, Clifton R., Jr.

    2009-01-01

    Dr. John Hope Franklin chronicled the experiences of African-Americans like no one before him, forcing America to recognize Black history as American history. His contributions were innumerable and his impact was abiding. In celebration of his life and legacy, the authors profile the celebrated scholar and activist, Dr. John Hope Franklin.

  16. 21. Historic American Buildings Survey John O. Brostrup, Photographer August ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Historic American Buildings Survey John O. Brostrup, Photographer August 21, 1936 12:30 P. M. DETAIL OF SILL ON SOUTH SIDE OF BASEMENT OF UNIT B. - General John Mason House, Analostan Island or Theodore Roosevelt Island, Washington, District of Columbia, DC

  17. Activities commemorating John B. Herrington as first Native American astronaut

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- Joyce and James Herrington, parents of John Herrington, accept a gift during a pre-launch Native American ceremony. They are the parents of John Herrington, mission specialist on mission STS-113. Herrington is the first Native American to be going into space.

  18. Activities commemorating John B. Herrington as first Native American astronaut

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- The Chickasaw Dance Troupe performs an Honor Dance for John Herrington's parents during the Native American Ceremony at the Rocket Garden in the KSC Visitor Complex. The ceremony was part of several days' activities commemorating John B. Herrington as the first tribally enrolled Native American astronaut to fly on a Shuttle mission. Herrington is a Mission Specialist on STS-113.

  19. Logos Announced the Light of Salvation: Interpreting How John Presented His Message in John 1:1-18, According to Functional Grammar

    ERIC Educational Resources Information Center

    Pollinger, Seth

    2014-01-01

    This study of John 1:1-18 describes how John (the speaker) presented his message to his audience within their activity of verbal communication. By focusing on verbal meaning, this interpretation analyzes how John presented and expressed his meanings through language by interpreting this text based on the seamless interrelation between John's…

  20. Luhmann Receives 2007 John Adam Fleming Medal

    NASA Astrophysics Data System (ADS)

    Russell, Christopher T.; Luhmann, Janet G.

    2008-02-01

    This year's John Adam Fleming medalist quickly established a reputation as an innovative and productive scientist with a broad range of interests. She made early and seminal contributions to aeronomy, cosmic rays, and magnetospheric and planetary physics. She contributed importantly to the understanding of the interaction of the solar wind with the atmosphere and magnetic fields of Mercury, Venus, Earth, and Mars. She has examined the behavior of planetary rings, the interaction of interstellar neutrals with heliospheric plasmas, as well as the interaction of planetary neutrals with the heliosphere. She has led in the study of the interaction of the moon Titan with the Saturn magnetosphere, and most recently she developed a vigorous solar physics effort, leading the implementation of the IMPACT particle and field package on the twin STEREO mission, now entering its second year of successful operation.

  1. John Herschel on the Discovery of Neptune

    NASA Astrophysics Data System (ADS)

    Kollerstrom, Nicholas

    2006-12-01

    The letters of John Herschel that concern the discovery of the planet Neptune have not been greatly discussed by historians of science. I have transcribed these in the course of archiving the British Neptune-discovery documents. Herschel tends to be depicted as a background figure in narrations of the story of Neptune's discovery, whereas the present account focuses upon his evolving view of the topic: the rival merits of the two main protagonists, and the startling manner in which an obscure branch of mathematics (perturbation theory) was able to pinpoint the position of a new sphere in the sky. As the son of the man who found Uranus, his views have a special relevance. Also, I suggest that his eloquent prose style may still be enjoyed today.

  2. John Quincy Adams's rhetorical crusade for astronomy.

    PubMed

    Portolano, M

    2000-09-01

    Astronomy thrived in Europe during the early nineteenth century, but in the United States a utilitarian mind-set opposed it. John Quincy Adams's oratory in support of American astronomical discovery reached its peak during congressional debate over the Smithsonian Institution (1838-1846). During this debate Adams countered proposals to found a university with plans for an observatory. His addresses to congressional and public audiences about observatories and astronomy were intended to foster interest in the science and encourage the growing astronomical community in America. Although the U.S. Naval Observatory in Washington, D.C., was established before the Smithsonian debate ended, many considered Adams its political father. Adams composed his speeches on astronomy in a systematic manner, following neoclassical principles of rhetoric that he had taught at Harvard University. His speeches both in and outside of Congress show evidence of the rhetorical principles he conscientiously used in the service of astronomy.

  3. John Shaw Billings as a Bibliographer

    PubMed Central

    Marson, Joyce

    1969-01-01

    The influences that a man's childhood have on his life are, it is well known, great. Life is essentially a part of the things that happen to the individual and it is the manner in which one relates oneself to these things that determines what one is. With these facts in mind this study of John Shaw Billings as a bibliographer has been approached. His early life has been reviewed as an influence on his later achievements. Stress has been placed on those events which led to his bibliographic activities. Dr. Billings was prolific in many fields. Others have given detailed analyses of his writings (1, 2). The present study will consider only his bibliographic works. The description of these follows the brief outline of his childhood and youth. PMID:4898628

  4. John Dewey and early Chicago functionalism.

    PubMed

    Backe, A

    2001-11-01

    John Dewey and James Angell are regarded respectively as the founder and systematizer of the Chicago school of functional psychology. The early Chicago school traditionally has been portrayed as a unified theoretical approach based primarily on William James's naturalist theory of mental processes. It is argued in this article that although the psychology systematized by Angell bore a close affinity to James's naturalism, Dewey's own psychology was based primarily on the neo-Hegelian philosophy of Thomas Hill Green. Through a review of a number of Dewey's major writings, Green's neo-Hegelian philosophy is shown to have influenced Dewey's views on psychological concepts such as reaction, emotion, and perception during the formative period of the Chicago school. The interpretation of Dewey's psychology developed in this article leads to the conclusion that early Chicago functionalism should not be regarded as a unified theoretical approach.

  5. John A. Simpson (1916-2000)

    NASA Astrophysics Data System (ADS)

    Jokipii, J. R.; Gloeckler, G.

    John Alexander Simpson, a long-time member and Fellow of AGU, member of the National Academy of Sciences, and last year's recipient of the Bowie Medal, died on August 31, 2000, from complications following open heart surgery. He was 83 years old and a professor emeritus at the University of Chicago, where he spent most of an extraordinarily varied and productive career.He received his bachelor's degree from Reed College in 1940, and a master's and a doctorate from New York University in 1942 and 1943. After working on the Manhattan Project until 1946, he joined the University of Chicago faculty where he rose through the ranks and was appointed to a succession of prestigious named professorships.

  6. Anesthesiology—The John Adriani Story

    PubMed Central

    Thomas, Mack A.

    2011-01-01

    Several authors have told the John Adriani story, but his proper recognition in developing the specialty of anesthesiology and his place as a pioneer have never been presented as such. The following article outlines his training and experiences in the early days of anesthesiology. The story of the many problems he encountered and how he developed teaching programs that remain in existence today is one to be admired and appreciated. Much of the information is from personal conversations with Dr Adriani. During his tenure as the Director of Anesthesia at Charity Hospital, I was a surgical house officer in the early 1960s and returned as an anesthesiology trainee in the late 1970s. We became close personal friends. He gave me hundreds of his slides, and we had many discussions about the past and current state of the specialty of anesthesiology. PMID:21603326

  7. STS-79 John Blaha address news media

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-79 Mission Specialist John E. Blaha addresses news media gathered for the flight crew's late night arrival at the KSC Shuttle Landing Facility. A veteran space traveler who served as either commander or pilot on his four previous Shuttle flights, Blaha is taking a mission specialist's slot on STS-79 because he will be transferring to the Russian Space Station Mir for an extended stay. American astronaut Shannon Lucid will take his place aboard the Space Shuttle Atlantis for the return trip home. Final preparations are under way for launch of Atlantis on Mission STS-79, with liftoff scheduled to occur during an approximately seven-minute window opening at 4:54 a.m. EDT, Sept.16.

  8. John B. Little Center Annual Symposium

    SciTech Connect

    Demple, Bruce F.

    2007-11-02

    The Annual Symposium of the John B. Little Center for Radiation Sciences and Environmental Health at the Harvard School of Public Health seeks to educate radiobiologists and biomedical scientists in related areas on the leading research related to the effects of ionizing radiation and related environmental agents in biological systems. This effort seeks to further the training of individuals in this field, and to foment productive interactions and collaborations among scientists at Harvard and with other institutions. The Symposium attracts world-class scientists as speakers, and a broad cross-section of attendees from academic, government, and industrial research centers, as well as editorial staff from leading scientific publications. In order to maintain this quality, funding to support the travel and local expenses of invited speakers is sought, along with funds to allow use of appropriate conference facilities.

  9. John Elliott Nafe (1914-1996)

    NASA Astrophysics Data System (ADS)

    Nelson, Robert J.

    John Elliott Nafe, known for his many pioneering contributions to seismological research, died on April 6 at his home in Vancouver, British Columbia. He had been an AGU Fellow since 1962. A physicist by training, Nafe proposed several important seismological concepts. In 1958, he was the first to demonstrate that sound waves could travel around the globe through the ocean. With colleague Charles L. Drake, he developed the Nafe-Drake Curve, which relates the velocity of sound through rock to the rock's density. He was one of several pioneering researchers at Lamont-Doherty Earth Observatory, who in the 1940s and 1950s began profiling the Earth's crust at different points around the globe—an effort that eventually resulted in the tectonic plate theory of continental movement.

  10. John F. Dewey—Tectonics Editor

    NASA Astrophysics Data System (ADS)

    Richman, Barbara T.

    ‘I want the journal to acquire a reputation for very rapid, fair, and accurate reviewing,’ asserted John F. Dewey, editor-in-chief of AGU's newest journal, Tectonics. Dewey said that he will rule the bimonthly, which will begin publication in February, ‘with a bit of a rod of iron’ to ensure that Tectonics is ‘where only original and important papers are published.’‘I'm going to be very strict with reviewers,’ Dewey explained in his quick British clip. ‘If the review does not come back to me within 10 days to 2 weeks, I'll review the paper myself. I'm also going to have a system whereby, if a paper needs major surgery after being refereed, it will be rejected. Papers will have to be in virtually publishable condition before they are first submitted,’ he said.

  11. John Adams and CERN: Personal Recollections

    NASA Astrophysics Data System (ADS)

    Brianti, G.; Plane, D. E.

    2014-02-01

    By any standards, John Adams had a most remarkable career. He was involved in three important, emerging technologies, radar, particle accelerators and controlled fusion, and had an outstanding impact on the last two. Without a university education, he attained hierarchical positions of the highest level in prestigious national and international organizations. This article covers the CERN part of his career, by offering some personal insights into the different facets of his contributions to major accelerator projects, from the first strong-focusing synchrotron, the PS, to the SPS and its conversion to a proton--antiproton collider. In particular, it outlines his abilities as a leader of an international collaboration, which has served as an example for international initiatives in other disciplines.

  12. John Quincy Adams's rhetorical crusade for astronomy.

    PubMed

    Portolano, M

    2000-09-01

    Astronomy thrived in Europe during the early nineteenth century, but in the United States a utilitarian mind-set opposed it. John Quincy Adams's oratory in support of American astronomical discovery reached its peak during congressional debate over the Smithsonian Institution (1838-1846). During this debate Adams countered proposals to found a university with plans for an observatory. His addresses to congressional and public audiences about observatories and astronomy were intended to foster interest in the science and encourage the growing astronomical community in America. Although the U.S. Naval Observatory in Washington, D.C., was established before the Smithsonian debate ended, many considered Adams its political father. Adams composed his speeches on astronomy in a systematic manner, following neoclassical principles of rhetoric that he had taught at Harvard University. His speeches both in and outside of Congress show evidence of the rhetorical principles he conscientiously used in the service of astronomy. PMID:11143785

  13. Different patterns of genetic structure of relict and isolated populations of endangered peat-bog pine (Pinus uliginosa Neumann).

    PubMed

    Wachowiak, W; Prus-Glowacki, W

    2009-01-01

    Recent changes in environmental conditions in populations of peat-bog pine (Pinus uliginosa Neumann) caused rapid decline or even extinction of the species in several stands in Central Europe. Conservation strategies for P. uliginosa require information about the evolutionary history and genetic structure of its populations. Using isozymes we assessed the genetic structure of P. uliginosa from four isolated stands in Poland and compared the results to genetic structures of other closely related pine species including eight populations of Pinus mugo, ten of Pinus sylvestris and one of Pinus uncinata. The level of genetic variability of P. uliginosa measured by the mean number of alleles per locus and average heterozygosity was similar to others related to P. uliginosa taxa from the reference group but it differs among populations. High genetic similarity was found between two populations of P. uliginosa from Low Silesian Pinewood. The populations were genetically distinct as compared to other populations including locus classicus of the species from the peat bog at Batorów Reserve. Very low genetic distance (DN = 0.002) and small genetic differentiation (GST = 0.003) were found between P. uliginosa and P. mugo in the sympatric populations of the species from Zieleniec peat bog suggesting the ongoing natural hybridisation and genetic contamination of peat-bog pine from this area. Some evidence for skew in allele frequency distribution potentially due to recent bottleneck was found in population from Low Silesian Pinewood. The analysed open pollinated progeny derived from two P. uliginosa stands from Low Silesian Pinewood showed the excess of homozygotes as compared to the maternal trees indicating high level of inbreeding (F = 0.105, F = 0.081). The results are discussed in the context of evolution of P. uliginosa populations, taxonomic relationships between the analysed species and conservation strategies for active protection of peat-bog pine. PMID:19875883

  14. John Bryant Curtis: neurosurgeon, leader and mentor.

    PubMed

    Lai, Leon; Kaye, Andrew H; Buckley, Penelope

    2009-10-01

    In every generation of neurosurgeons, there are those whose judgment and professional accomplishments gain distinction among their peers. Such exceptional leaders often exhibit unique talent and inevitably, they exert a lasting influence on their field of endeavour. John Bryant Curtis was one of these. Rising from humble roots, Curtis made his impact in neurosurgery starting at the age of 36. A legendary and a master neurosurgeon for his period, he became the second director of Neurosurgery at The Royal Melbourne Hospital, succeeding R. S. Hooper in 1967. Like Hooper, Curtis had undertaken a three years Fellowship in Oxford at the Radcliffe Infirmary to train under Sir Hugh Cairns in 1947. On his return to Australia in 1950, he was among the pioneers in introducing percutaneous angiography into the country, which earned him the honourable Hunterian Professorship at the Royal College of Surgeons of England in 1958. This was in recognition for his contribution to the investigation of intracranial aneurysms. Among the many neurosurgeons whom John Bryant Curtis trained at the Royal Melbourne Hospital and at the Prince Henry Hospital, he was considered, by a few, a controversial figure. Others found the experience very positive. He was a distinguished neurosurgeon with expert clinical judgment, but simultaneously a stern and formidable character who demanded only the best from his staff and trainees. He was contrastingly thoughtful and gentle to his patients. Behind every great leader, there is a personal side, often more gentle and vulnerable than the public persona. Curtis was a generous, loving, funny, although at times eccentric human being. Although he died in 1989, ironically from metastatic brain tumours, his dynamic personality and work ethic imprinted a lasting impression on those who had met him.

  15. John Dewey: Su filosofia y filosofia de la educacion (John Dewey: His Philosophy and Philosophy of Education). Working Paper.

    ERIC Educational Resources Information Center

    Zoreda, Margaret Lee

    This paper forms part of an investigation about how the philosophy of John Dewey (1859-1952) can illuminate the practice of the teaching of English as a foreign language. The paper seeks to interpret and synthesize John Dewey's philosophical works to construct a "Deweyian lens" with which to analyze and evaluate the field of the teaching of…

  16. Dr. Wernher Von Braun with Dr. Christian Barnard.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Christian Barnard Tours Marshall Space Flight Center. Shown in Dr. Von Braun's office are (left to right): Dr. Ernst Sthulinger, a representative from General Electric, Dr. Wernher Von Braun, Dr. Christian Barnard, and Dr. Eberhard Rees.

  17. The Trieste Lecture of John Stewart Bell

    NASA Astrophysics Data System (ADS)

    Bassi, Angelo; Carlo Ghirardi, Gian

    2007-03-01

    Delivered at Trieste on the occasion of the 25th Anniversary of the International Centre for Theoretical Physics, 2 November 1989 The video of this lecture is available here. Please see the PDF for the transcript of the lecture. General remarks by Angelo Bassi and GianCarlo Ghirardi During the autumn of 1989 the International Centre for Theoretical Physics, Trieste, celebrated the 25th anniversary of its creation. Among the many prestigious speakers, who delivered extremely interesting lectures on that occasion, was the late John Stewart Bell. All lectures have been recorded on tape. We succeeded in getting a copy of John's lecture. In the lecture, many of the arguments that John had lucidly stressed in his writings appear once more, but there are also extremely interesting new remarks which, to our knowledge, have not been presented elsewhere. In particular he decided, as pointed out by the very choice of the title of his lecture, to call attention to the fact that the theory presents two types of difficulties, which Dirac classified as first and second class. The former are those connected with the so-called macro-objectification problem, the latter with the divergences characterizing relativistic quantum field theories. Bell describes the precise position of Dirac on these problems and he stresses appropriately how, contrary to Dirac's hopes, the steps which have led to a partial overcoming of the second class difficulties have not helped in any way whatsoever to overcome those of the first class. He then proceeds to analyse the origin and development of the Dynamical Reduction Program and draws attention to the problems that still affect it, in particular that of a consistent relativistic generalization. When the two meetings Are there quantum jumps? and On the present status of Quantum Mechanics were organized in Trieste and Losinj (Croatia), on 5 10 September 2005, it occurred to us that this lecture, which has never been published, might represent an

  18. von Braun 1952 Space Station Concept

    NASA Technical Reports Server (NTRS)

    1952-01-01

    This is a von Braun 1952 space station concept. In a 1952 series of articles written in Collier's, Dr. Wernher von Braun, then Technical Director of the Army Ordnance Guided Missiles Development Group at Redstone Arsenal, wrote of a large wheel-like space station in a 1,075-mile orbit. This station, made of flexible nylon, would be carried into space by a fully reusable three-stage launch vehicle. Once in space, the station's collapsible nylon body would be inflated much like an automobile tire. The 250-foot-wide wheel would rotate to provide artificial gravity, an important consideration at the time because little was known about the effects of prolonged zero-gravity on humans. Von Braun's wheel was slated for a number of important missions: a way station for space exploration, a meteorological observatory and a navigation aid. This concept was illustrated by artist Chesley Bonestell.

  19. Dr. Wernher Von Braun talkes with George Hardy.

    NASA Technical Reports Server (NTRS)

    1999-01-01

    George Hardy of the Marshall Space Flight center's Astronautics Laboratory, talks with Dr. Wernher Von Braun (right), deputy associate administrator for planning. Dr. Von Braun was inspecting the mockup of the Saturn workshop during a visit to the Marshall Center. The visit coincided with the 10th anniversary celebration of the center of which Dr. Von Braun was director until March 1, 1970.

  20. Obituary: John Norris Bahcall, 1934-2005

    NASA Astrophysics Data System (ADS)

    Striker, Jeremiah P.; Bahcall, Neta A.

    2007-12-01

    John Norris Bahcall, one of the most creative and influential astrophysicists of his generation — a scientist who helped prove what makes the Sun shine and helped make the Hubble Space Telescope a reality — passed away in Pasadena, California, on 17 August 2005. Bahcall died peacefully in his sleep from a rare blood disorder. For the past 35 years, Bahcall was the Richard Black Professor of Natural Sciences at the Institute for Advanced Study in Princeton, New Jersey, where he created one of the leading astrophysics programs in the world. Active and working to the end, Bahcall said that he was always grateful for a full and happy life that exceeded his wildest expectations. Bahcall died as he lived, surrounded by the family he loved, embracing life to its fullest, happy, working and joking to the end. Bahcall's stellar career encompassed seminal contributions in numerous fields of astrophysics as well as extraordinary leadership on behalf of the scientific community, including the American Astronomical Society, the American Physical Society, the National Academy of Sciences, NASA, and Congress. Bahcall's contributions made him one of the scientific leaders of his time. He had been recognized by numerous awards including the 1998 National Medal of Science from President Clinton, the Gold Medal of the Royal Astronomical Society, the Medal of the Swedish Royal Academy, the Dan David Award, the Fermi Award, the first Hans Bethe Prize, the Franklin Medal, the Comstock Prize in physics, NASA's Exceptional Scientific Achievement Medal, NASA's Distinguished Public Service Medal, and the top awards of the American Astronomical Society — including the Russell Award, the Heineman Prize, and the Warner Prize. Bahcall was elected to the National Academy of Sciences in 1976 and to the American Philosophical Society in 2001. He was the recipient of Honorary Degrees from numerous universities around the world. Bahcall's scientific interests and expertise ranged from neutrino

  1. Bewertung von Fahrzeuggeräuschen

    NASA Astrophysics Data System (ADS)

    Genuit, Klaus; Schulte-Fortkamp, Brigitte; Fiebig, André; Haverkamp, Michael

    Bei der Wahrnehmung und Beurteilung eines Automobils sind unzählige Merkmale und Eigenschaften von Bedeutung. Dabei können Merkmale objektiv-technisch beschrieben werden, wie Angaben zur Motorisierung, Höchstgeschwindigkeit, Drehmoment, zulässige Zuladung, Verbrauch usw. Daneben sind weitere Eigenschaften von Bedeutung, die sich einer einfachen objektiv-technischen Beschreibung entziehen. Hier sind Begriffe zu nennen, wie Sicherheit, allgemeine Qualitätsanmutung, Design, Ergonomie, Komfort, Haptik, Fahrdynamik, Zuverlässigkeit, die deutlich schwieriger objektiv erfassbar und beschreibbar sind (Abb. 4.1).

  2. Chest wall angiolipoma complicating von Recklinghausen disease.

    PubMed

    Komatsu, Teruya; Takahashi, Koji; Fujinaga, Takuji

    2013-09-01

    We present the case of an 18-year-old man with chest wall angiolipoma and a medical history of von Recklinghausen neurofibromatosis. The chest wall tumor was originally detected during an evaluation for chest pain. For diagnostic and therapeutic purposes, video-assisted thoracoscopic resection was performed, and the tumor was histopathologically confirmed to be an angiolipoma. Chest wall angiolipoma is exceptionally rare. Only two cases have been reported in the English literature, with no reports regarding chest wall angiolipoma in a patient with von Recklinghausen disease.

  3. Clinical and pathological insights into Johne's disease in buffaloes.

    PubMed

    Dalto, André Cabrera; Bandarra, Paulo Mota; Pavarini, Saulo Petinatti; Boabaid, Fabiana Marques; de Bitencourt, Ana Paula Gobbi; Gomes, Marcos Pereira; Chies, José; Driemeier, David; da Cruz, Cláudio Estêvão Farias

    2012-12-01

    Alternative diagnostic tools and interesting epidemiological assumptions were associated with an outbreak of Johne's disease. In a buffalo herd infected with paratuberculosis, seven clinically affected animals and 21 animals with anti-Mycobacterium avium ELISA reactions were identified. Total herd included 203 buffaloes. Most lesions were comparable to those described in buffaloes and cattle affected by Johne's disease. Water buffalo behaviors such as communal nursing and allosuckling may be additional risk factors for this disease. Detection of positive Ziehl-Neelsen staining and anti-M. avium immunolabeling in rectal biopsies from one buffalo with paratuberculosis are highlighted as auxiliary diagnostic tools for Johne's disease in live animals.

  4. Neumann boundary controllability of the Gear-Grimshaw system with critical size restrictions on the spatial domain

    NASA Astrophysics Data System (ADS)

    Capistrano-Filho, Roberto A.; Gallego, Fernando A.; Pazoto, Ademir F.

    2016-10-01

    In this paper, we study the boundary controllability of the Gear-Grimshaw system posed on a finite domain (0, L), with Neumann boundary conditions: ut + uu_x+u_{xxx} + a v_{xxx} + a_1vv_x+a_2 (uv)_x =0, & {in} (0,L)× (0,T), c v_t +rv_x +vv_x+abu_{xxx} +v_{xxx}+a_2buu_x+a_1b(uv)_x =0, &{in} (0,L)× (0,T), u_{xx}(0,t)=h_0(t), u_x(L,t)=h_1(t), u_{xx}(L,t)=h_2(t), &{in} (0,T), v_{xx}(0,t)=g_0(t), v_x(L,t)=g_1(t), v_{xx}(L,t)=g_2(t), &{in} (0,T), u(x,0)= u^0(x), quad v(x,0)= v^0(x), & {in} (0,L). We first prove that the corresponding linearized system around the origin is exactly controllable in {(L^2(0,L))^2} when h 2( t) = g 2( t) = 0. In this case, the exact controllability property is derived for any L > 0 with control functions {h_0, g_0 in H^{-1/3}(0,T)} and {h_1, g_1in L^2(0,T)}. If we change the position of the controls and consider {h_0(t)=h_2(t)=0} (resp. {g_0(t)=g_2(t)=0)}, we obtain the result with control functions {g_0, g_2in H^{-1/3}(0,T)} and {h_1, g_1in L^2(0,T)} if and only if the length L of the spatial domain (0, L) does not belong to a countable set. In all cases, the regularity of the controls are sharp in time. If only one control act in the boundary condition, {h_0(t)=g_0(t)=h_2(t)=g_2(t)=0} and g 1( t) = 0 (resp. h 1( t) = 0), the linearized system is proved to be exactly controllable for small values of the length L and large time of control T. Finally, the nonlinear system is shown to be locally exactly controllable via the contraction mapping principle, if the associated linearized systems are exactly controllable.

  5. Addendum to ‘On the Dirichlet to Neumann problem for the 1-dimensional cubic NLS equation on the half-line’

    NASA Astrophysics Data System (ADS)

    Antonopoulou, D. C.; Kamvissis, S.

    2016-10-01

    We present a short note on the extension of the results of Antonopoulou and Kamvissis 2015 Nonlinearity 28 3073-99 to the case of non-zero initial data. More specifically, the defocusing cubic NLS equation is considered on the half-line with decaying (in time) Dirichlet data and sufficiently smooth and decaying (in space) initial data. We prove that for this case also, and for a large class of decaying Dirichlet data, the Neumann data are sufficiently decaying so that the Fokas unified method for the solution of defocusing NLS is applicable.

  6. John Snow's legacy: epidemiology without borders.

    PubMed

    Fine, Paul; Victora, Cesar G; Rothman, Kenneth J; Moore, Patrick S; Chang, Yuan; Curtis, Val; Heymann, David L; Slutkin, Gary; May, Robert M; Patel, Vikram; Roberts, Ian; Wortley, Richard; Torgerson, Carole; Deaton, Angus

    2013-04-13

    This Review provides abstracts from a meeting held at the London School of Hygiene and Tropical Medicine, on April 11-12, 2013, to celebrate the legacy of John Snow. They describe conventional and unconventional applications of epidemiological methods to problems ranging from diarrhoeal disease, mental health, cancer, and accident care, to education, poverty, financial networks, crime, and violence. Common themes appear throughout, including recognition of the importance of Snow's example, the philosophical and practical implications of assessment of causality, and an emphasis on the evaluation of preventive, ameliorative, and curative interventions, in a wide variety of medical and societal examples. Almost all self-described epidemiologists nowadays work within the health arena, and this is the focus of most of the societies, journals, and courses that carry the name epidemiology. The range of applications evident in these contributions might encourage some of these institutions to consider broadening their remits. In so doing, they may contribute more directly to, and learn from, non-health-related areas that use the language and methods of epidemiology to address many important problems now facing the world.

  7. John Beebe in conversation with Beverley Zabriskie.

    PubMed

    Beebe, John; Zabriskie, Beverley

    2011-06-01

    John Beebe speaks with Beverley Zabriskie about the central motifs of his life and depth psychological experience, and how these informed his choice of vocation as psychiatrist, Jungian analyst, educator and author. Dr. Beebe narrates how he moved beyond the fate assigned the son of a needy mother and abandoning father. He illustrates how the role his family expected him to fill constellated archetypal motifs--the magical or divine curative child, the whiz kid--from which he had then to disidentify for the sake of becoming an individual with a personal voice and capacity to express his own true values. He tells of his differentiation and search for completion through the perspective of Jung's psychological types theory. He also reflects on the evolution of Jungian analytic theory and practice generally, his editorship of the JAP and the San Francisco Jung Institute Library Journal, his confrontation with analytic homophobia, and the emerging quality of professional and personal relationships in relation to ethics and to love. He assesses Jung's courage and integrity as displayed through the release of Jung's Red Book, and his own quest for an organic and psychological moral stance expressed in his benchmark book, Integrity in Depth.

  8. John Dique: dialysis pioneer and political advocate.

    PubMed

    George, Charles R P

    2016-02-01

    John Dique (1915-1995) epitomized the internationalism of medicine, the intellectual and manual dexterity of many pioneers of dialysis, and the social concern evinced by many nephrologists. Born in Burma of French, German, British and Indian ancestry; educated in India; an Anglo-Indian who described himself as British without ever having visited Britain; he moved to Australia in 1948 to escape the murderous inter-ethnic conflict that befell multicultural India as it and Pakistan became independent. Settling in Brisbane, he pioneered several novel medical techniques. After inventing some simple equipment to facilitate intravenous therapy, he established a neonatal exchange blood transfusion programme. Then, between 1954 and 1963, he personally constructed and operated two haemodialysis machines with which to treat patients suffering from acute renal failure, the first such treatment performed in Australasia. His patients survival results were, for the era, remarkable. He subsequently helped found the Royal Australasian College of Pathologists and went on to establish a successful private pathology practice. The latter years of his life, however, saw him become a social and political advocate. He fiercely opposed the emerging ideologies of multiculturalism and social liberalism that, he predicted, would seriously damage the national fabric of Western society. Public vilification ensued, his medical achievements disregarded. It does seem likely, however, that in none of the areas that he touched - whether medical, social, or political - has the last word yet been said. PMID:26913881

  9. Did John B. Watson Really "Found" Behaviorism?

    PubMed

    Malone, John C

    2014-05-01

    Developments culminating in the nineteenth century, along with the predictable collapse of introspective psychology, meant that the rise of behavioral psychology was inevitable. In 1913, John B. Watson was an established scientist with impeccable credentials who acted as a strong and combative promoter of a natural science approach to psychology when just such an advocate was needed. He never claimed to have founded "behavior psychology" and, despite the acclaim and criticism attending his portrayal as the original behaviorist, he was more an exemplar of a movement than a founder. Many influential writers had already characterized psychology, including so-called mental activity, as behavior, offered many applications, and rejected metaphysical dualism. Among others, William Carpenter, Alexander Bain, and (early) Sigmund Freud held views compatible with twentieth-century behaviorism. Thus, though Watson was the first to argue specifically for psychology as a natural science, behaviorism in both theory and practice had clear roots long before 1913. If behaviorism really needs a "founder," Edward Thorndike might seem more deserving, because of his great influence and promotion of an objective psychology, but he was not a true behaviorist for several important reasons. Watson deserves the fame he has received, since he first made a strong case for a natural science (behaviorist) approach and, importantly, he made people pay attention to it. PMID:27274955

  10. John Beebe in conversation with Beverley Zabriskie.

    PubMed

    Beebe, John; Zabriskie, Beverley

    2011-06-01

    John Beebe speaks with Beverley Zabriskie about the central motifs of his life and depth psychological experience, and how these informed his choice of vocation as psychiatrist, Jungian analyst, educator and author. Dr. Beebe narrates how he moved beyond the fate assigned the son of a needy mother and abandoning father. He illustrates how the role his family expected him to fill constellated archetypal motifs--the magical or divine curative child, the whiz kid--from which he had then to disidentify for the sake of becoming an individual with a personal voice and capacity to express his own true values. He tells of his differentiation and search for completion through the perspective of Jung's psychological types theory. He also reflects on the evolution of Jungian analytic theory and practice generally, his editorship of the JAP and the San Francisco Jung Institute Library Journal, his confrontation with analytic homophobia, and the emerging quality of professional and personal relationships in relation to ethics and to love. He assesses Jung's courage and integrity as displayed through the release of Jung's Red Book, and his own quest for an organic and psychological moral stance expressed in his benchmark book, Integrity in Depth. PMID:21675988

  11. Open letter to Pope John Paul II.

    PubMed

    Sai, F

    1991-01-01

    In an Open Letter to Pope John Paul II, written on World Population Day (July 11) 1991, Dr. Fred Sai, President of International Planned Parenthood Federation (IPPF), called for a dialogue on voluntary family planning as a means of avoiding unwanted pregnancy. A half million women die each year from pregnancy-related causes--a death toll that could be dramatically reduced by universal access to low cost, effective contraception. Family planning further represents the best protection against abortion. The Catholic Church's vehement opposition to abortion and family planning methods other than periodic abstinence is in marked contrast to its support to human rights in other settings. The Church has supported struggles for economic ju stice in and among nations, sided with the poor, and advocated for transitions to democracy. At the same time, the family planning movement--which has as its overall objective the protection of the health and welfare of women, children, and families--is viewed by the Vatican as a vehicle for the enslavement rather than liberation of women. The opening of a sensitive dialogue between the Catholic Church and supporters of voluntary family planning could help couples make sound moral decisions about their families and contribute to saving the lives of millions of women, most of them poor. PMID:12178850

  12. John Wheeler, 1933 - 1959: Particles and Weapons

    NASA Astrophysics Data System (ADS)

    Ford, Kenneth

    2009-05-01

    During the early part of his career, John Archibald Wheeler made an astonishing number of contributions to nuclear and particle physics, as well as to classical electrodynamics, often in collaboration with another physicist. He was also a major contributor to the Manhattan Project (in Chicago and Hanford rather than Los Alamos), and, following World War II, became an influential scientific cold warrior. His early achievements in physics include the calculated scattering of light by light (with Gregory Breit), the prediction of nuclear rotational states (with Edward Teller), the theory of fission (with Niels Bohr), action-at-a-distance electrodynamics (with Richard Feynman), the theory of positronium, the universal weak interaction (with Jayme Tiomno), and the proposed use of the muon as a nuclear probe particle. He gained modest fame as the person who identified xenon 135 as a reactor poison. His Project Matterhorn contributed significantly to the design of the H bomb, and his Project 137, which he had hoped would flower into a major defense lab, served as the precursor to the Jason group.

  13. John Bardeen and the theory of superconductivity

    SciTech Connect

    Schrieffer, J.R. )

    1992-04-01

    Bardeen's knowledge of the experimental data had bounded the theory of superconductivity quite tightly before B, C and S developed their theory. When one speaks with John Bardeen's friends about him, one frequently hears words such as brilliant, quiet, persistent, generous, visionary, athletic, kind, thoughtful and remarkable. It is the author's good fortune to have the chance to recount some incidents from his life that are connected with the theory of superconductivity. This article draws on the author's personal memories; his many other friends and colleagues will set down their own recollections elsewhere. The evolution of the microscopic theory of superconductivity closely parallels the scientific life of Joh Bardeen. Starting with his PhD dissertation, done under the guidance of Eugene Wigner, he spent much of his life developing an understanding of electron interaction effects and transport properties of metals, semiconductors and superconductors. His fascination with the remarkable phenomenon of superconductivity goes back to his graduate student days at Princeton. Although interrupted during the war years and in the late 1940's at Bell Labs, he returned to this perplexing topic when he moved to the University of Illinois in 1951. 20 refs., 7 figs.

  14. Noise levels in Johns Hopkins Hospital

    NASA Astrophysics Data System (ADS)

    Busch-Vishniac, Ilene J.; West, James E.; Barnhill, Colin; Hunter, Tyrone; Orellana, Douglas; Chivukula, Ram

    2005-12-01

    This article presents the results of a noise survey at Johns Hopkins Hospital in Baltimore, MD. Results include equivalent sound pressure levels (Leq) as a function of location, frequency, and time of day. At all locations and all times of day, the Leq indicate that a serious problem exists. No location is in compliance with current World Health Organization Guidelines, and a review of objective data indicates that this is true of hospitals throughout the world. Average equivalent sound levels are in the 50-60 dB(A) range for 1 min, 12, and 24 h averaging time periods. The spectra are generally flat over the 63-2000 Hz octave bands, with higher sound levels at lower frequencies, and a gradual roll off above 2000 Hz. Many units exhibit little if any reduction of sound levels in the nighttime. Data gathered at various hospitals over the last 45 years indicate a trend of increasing noise levels during daytime and nighttime hours. The implications of these results are significant for patients, visitors, and hospital staff.

  15. PREFACE: John Desmond Bernal: Science and Society

    NASA Astrophysics Data System (ADS)

    Casey, Vincent

    2007-02-01

    This meeting, held in the Limerick Institute of Technology, on Thursday 1 June 2006, was organised by the Munster Group of the Institute of Physics in Ireland to commemorate the life and work of John Desmond Bernal. Bernal, was born in Nenagh in 1901. Alan Mackay, who worked with Bernal at Birkbeck College coins the word 'Polytropic' to describe Bernal. He was active and hugely influential in a wide range of areas such as science, politics and society, and was instrumental in the creation of whole new areas of intellectual endeavour such as the 'science of science', molecular biology, and operations research. Andrew Brown's analogy for Bernal's mind is that 'it was like a diamond—beautifully structured, multifaceted and dazzling to behold'. In relation to Bernal, Helena Sheehan states that: 'His legacy is complex. All the more so because he was marxist in philosophy, communist in politics, polyamorous in sexuality.'. Like religion, these are areas that conventional scientists tend to shy away from or at the very least consign to very separate and often neglected 'compartments'. According to Sheehan, 'Bernal came to marxism seriously and intelligently. He found in its philosophical framework a structure in which he could live, think, create, pursue science, act politically and develop further. It opened him radically to the world, rather than closing him down or constricting him, as critics imply.'. And his contributions to science and to society are significant and enduring. Just two areas of 'his science' were addressed in some detail at this meeting. Martin Caffrey treats the area of structural biology in the context of modern developments but focusing on Bernal's role in its evolution. John Finney gives an account of Bernal's 'two bouts of activity' on the structure of water and as Bernal's last PhD student he gives unique insights on how Bernal worked and why he 'did science'. Bernal writes in response to a well wisher on his 70th birthday: 'I am sure that

  16. Dr. John Frederick May and the identification of John Wilkes Booth's body.

    PubMed

    Spiegel, A D

    1998-10-01

    Shortly after President Abraham Lincoln's assassin was killed on April 26, 1865, a formal inquest was held to positively identify the body. Dr. John Frederick May, a leading surgeon in the District of Columbia, was summoned to examine the remains. Two years earlier, Dr. May had removed a fibroid tumor from the back of the assassin's neck and an identifiable large ugly scar resulted when the wound inadvertently opened and healed by granulation. Based upon the recognition of the scar made by his scalpel, Dr. May made a positive identification. PMID:9793835

  17. Untersuchungen zur Entwicklung von Satellitengalaxien

    NASA Astrophysics Data System (ADS)

    Seidel, Björn

    2002-01-01

    Gleichgewichtsmodelle ein- und zweikomponentiger Satellitengalaxien werden erzeugt und die Gezeiteneinwirkungen der als starres äußeres Potential angenommenen Milchstraße auf sie betrachtet. Eine erste Reihe von Simulationen mit anfänglich kugelsymmetrischen einkomponentigen Satelliten zeigt, daß sich nach elliptischer Deformation ein Balken und Schweife ungleicher Länge ausbilden, deren Aussehen sich periodisch ändert. Mithilfe von Vergleichssimulationen wurden folgende Phänomene am Satelliten entdeckt: (1) Hochdichtebereiche in den Schweifen, (2) Niedrigdichtebereiche um den Kern bzw. Balken und (3) ein oft verdeckter Balken. Analysiert wird das Erscheinungsbild in Zeitabhängigkeit. Die Teilchen gehen dem Kern über den Balken verloren und bewegen sich entlang gewisser stets gleich aussehender charakteristischer Strukturen in die Schweife. Nach einer Herleitung allgemeiner Größen des mehrkomponentigen Kingprofils werden drei stabile Standardmodelle zweikomponentiger Satellitengalaxien mit Massenverhältnis 1:10 (baryonische zu dunkle Materie) und unterschiedlicher Verteilung der dunklen und sichtbaren Materie gefunden. Ohne die Allgemeinheit der Ergebnisse zu beeinträchtigen, wurde dabei die Große Magellanische Wolke als Grundlage der Modelle genommen. Nach geeigneter Wahl der Bahn, zu der der Gezeitenradius des verwendeten dreikomponentigen Milchstraßenpotentials sowohl analytisch als auch numerisch berechnet wird, werden Simulationen der Modelle analysiert. Hauptaugenmerk ist das unterschiedliche Verhalten der Komponenten. Hauptergebnisse: (1) Es ist möglich, große Anteile dunkler, jedoch nur geringe sichtbarer Materie abzulösen. Dunkle und sichtbare Materie können unterschiedliche morphologische Strukturen bilden. (2) Je nach Konzentration der Komponenten ist die Eigengravitation der Teilchen mehr oder weniger für das Aussehen bestimmend. (3) Die Kernauflösung des Satelliten findet im Perigalaktikum (PG), sein Zerfall aber erst im

  18. 6. Historic American Buildings Survey John O. Brostrup, Photographer September ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer September 17, 1936 VIEW FROM NORTHEAST (front) - Wheat Row, 1315-1321 Fourth Street Southwest, Washington, District of Columbia, DC

  19. 1. Historic American Buildings Survey John O. Brostrup, Photographer December ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, Photographer December 29, 1936 10:45 A. M. DETAIL OF MANTEL, 1321 HOUSE, SECOND FLOOR FRONT ROOM NORTH WALL - Wheat Row, 1321 Fourth Street Southwest, Washington, District of Columbia, DC

  20. 1. Historic American Buildings Survey John O. Brostrup, Photographer September ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, Photographer September 17, 1936 10:45 A. M. VIEW OF 1315 4th St., S. W., FROM NORTHEAST (front) - Wheat Row, 1315 Fourth Street Southwest, Washington, District of Columbia, DC

  1. 10. Historic American Buildings Survey John O. Brostrup, Photographer October ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey John O. Brostrup, Photographer October 19, 1936 1:40 P. M. DETAIL OF MUSIC CLOSET, MUSIC ROOM, NORTHEAST CORNER. - Grayhaven Manor, State Route 109 Vicinity, Poolesville, Montgomery County, MD

  2. 5. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 11:45 A.M. DETAIL MAIN ENTRANCE - Gladswood, Patuxent Wild Life Center, State Route 197, Bowie, Prince George's County, MD

  3. 1. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, Photographer May 12, 1936 11:25 A.M. VIEW FROM SOUTHWEST (front) - Christ Church at Accokeek, 600 West Farmington Road, Accokeek, Prince George's County, MD

  4. 1. Historic American Buildings Survey John O. Brostrup, photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, photographer May 21, 1936 9:45 A.M. ONE-HALF VIEW FROM SOUTHWEST (Front) - Forest Hill, 4310 Enterprise Road (State Route 556), Buena Vista, Prince George's County, MD

  5. 20. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 3:15 P.M. VIEW OF GAZEBO FROM NORTH (front) - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  6. 6. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer May 26, 1936 1:35 P.M. DETAIL OF CORNER MANTEL (North Living Room - North East Corner) - Oaklands, Contee Road, Contee, Prince George's County, MD

  7. 23. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Historic American Buildings Survey John O. Brostrup, Photographer May 26, 1936 11:20 A.M. VIEW OF SERVANT QUARTERS FROM SOUTHEAST. - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  8. 19. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Historic American Buildings Survey John O. Brostrup, Photographer May 26, 1936 11:45 A. M. VIEW OF ENTRANCE GATE FROM SOUTHEAST. - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  9. 4. Historic American Buildings Survey John Brostrup, Photographer May 21, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey John Brostrup, Photographer May 21, 1936 11:30 A.M. View From Northeast - Gladswood, Patuxent Wild Life Center, State Route 197, Bowie, Prince George's County, MD

  10. 22. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 3:25 P.M. VIEW OF GAZEBO FROM NORTHWEST. - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  11. 15. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 12:15 A.M. ENTRANCE HALL STAIR DETAIL - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  12. 9. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey John O. Brostrup, Photographer May 26, 1936 2:35 P.M. VIEW FROM NORTHWEST (Front) - Baltimore House, 4811 Riverdale Road, Riverdale Park, Prince George's County, MD

  13. 3. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 11:20 A.M. VIEW FROM NORTHWEST. - Gladswood, Patuxent Wild Life Center, State Route 197, Bowie, Prince George's County, MD

  14. 2. Historic American Buildings Survey John O. Brostrup, photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey John O. Brostrup, photographer May 21, 1936 9:50 A.M. ONE-HALF VIEW FROM SOUTHWEST (Front) - Forest Hill, 4310 Enterprise Road (State Route 556), Buena Vista, Prince George's County, MD

  15. 17. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 12:40 P.M. DETAIL OF CHINA CUPBOARD (Banquet Room) - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  16. 6. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 10:45 A.M. ENTRANCE HALL - GENERAL VIEW - Gladswood, Patuxent Wild Life Center, State Route 197, Bowie, Prince George's County, MD

  17. 7. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey John O. Brostrup, Photographer May 12, 1936 9:35 A.M. DETAIL OF OLD PEWS (Pulpit Modern) - Broad Creek Church, 9801 Old Oxon Hill Road, Friendly, Prince George's County, MD

  18. 16. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Historic American Buildings Survey John O. Brostrup, Photographer May 21, 1936 12:30 P.M. DETAIL OF CORNICE (Entrance Hall) - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  19. 7. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey John O. Brostrup, Photographer May 26, 1936 10:50 A.M. VIEW FROM EAST (Front) - Montpelier, Montpelier Drive & State Route 197, Laurel, Prince George's County, MD

  20. Astronaut John Young in Command Module Simulator during Apollo Simulation

    NASA Technical Reports Server (NTRS)

    1968-01-01

    Astronaut John W. Young, command module pilot, inside the Command Module Simulator in bldg 5 during an Apollo Simulation. Astronauts Thomas P. Stafford, commander and Eugene A. Cernan, lunar module pilot are out of the view.

  1. 3. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey John O. Brostrup, Photographer March 4, 1937 2:00 P.M. VIEW FROM WEST. - REAR - National Zoological Park, Holt House, Adams Mill Road Vicinity, Washington, District of Columbia, DC

  2. 4. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey John O. Brostrup, Photographer March 4, 1937 2:15 P.M. VIEW FROM NORTHWEST. - REAR - National Zoological Park, Holt House, Adams Mill Road Vicinity, Washington, District of Columbia, DC

  3. 2. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey John O. Brostrup, Photographer March 4, 1937 1:45 P.M. VIEW FROM SOUTHWEST (front). - National Zoological Park, Holt House, Adams Mill Road Vicinity, Washington, District of Columbia, DC

  4. The Ecological Perspective in John Dewey's Philosophy of Education.

    ERIC Educational Resources Information Center

    Colwell, Tom

    1985-01-01

    This paper offers an interpretation of John Dewey's educational thought from an ecological point of view, i.e., one which sees educational activity as an interrelationship between human organisms and social environment and the nonhuman biophysical environment. (MT)

  5. 10. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 11:35 A.M. COPY OF TEXT, NORTH END OF WEST WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  6. 16. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 2:15 P.M. COPY OF TEXT OVER PULPIT, EAST WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  7. 15. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 2:00 P.M. COPY OF TEXT, OVER DOOR, EAST WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  8. 11. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 11:45 A.M. COPY OF TEXT, WEST END OF NORTH WALL IN THE CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  9. 18. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 2:45 P.M. COPY OF TEXT, EAST END OF SOUTH WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  10. 13. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 1:30 P.M. COPY TEXT, EAST END OF NORTH WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  11. 12. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 12:05 COPY OF TEXT, CENTER OF NORTH WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  12. 19. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 3:15 P.M. COPY OF TEXT, CENTER OF SOUTH WALL, IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  13. 14. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 1:45 P.M. COPY OF TEXT, NORTH END OF EAST WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  14. 17. Historic American Buildings Survey, John O. Brostrup, Photographer January ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Historic American Buildings Survey, John O. Brostrup, Photographer January 13, 1937 2:30 P.M. COPY OF TEXT, SOUTH END OF EAST WALL IN CHAPEL OF SAAL. - The Cloisters, Saal, Ephrata, Lancaster County, PA

  15. 11. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey John O. Brostrup, Photographer March 22, 1937 10:20 A.M. DETAIL OF SHOE SCRAPER. - Timothy Caldwell House, 2017 "Eye" Street Northwest, Washington, District of Columbia, DC

  16. 8. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey John O. Brostrup, Photographer March 22, 1937 9:40 A.M. VIEW FROM SOUTHWEST (front). - Timothy Caldwell House, 2017 "Eye" Street Northwest, Washington, District of Columbia, DC

  17. 7. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey John O. Brostrup, Photographer March 22, 1937 9:30 A.M. VIEW FROM SOUTH (front). - Timothy Caldwell House, 2017 "Eye" Street Northwest, Washington, District of Columbia, DC

  18. 9. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey John O. Brostrup, Photographer March 22, 1937 10:00 A.M. DETAIL OF ENTRANCE (south elevation). - Timothy Caldwell House, 2017 "Eye" Street Northwest, Washington, District of Columbia, DC

  19. 10. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey John O. Brostrup, Photographer March 22, 1937 10:10 A.M. DETAIL OF ARCH. - Timothy Caldwell House, 2017 "Eye" Street Northwest, Washington, District of Columbia, DC

  20. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TENTH FLOOR SOUTH WING CAFETERIA FOOD LINE, FACING NORTH - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  1. Sir John Cornforth AC CBE FRS: his synthetic work.

    PubMed

    Purchase, Rupert; Hanson, James R

    2015-01-01

    Sir John Cornforth work on the synthesis of cholesterolandpenicillamine, on the chemistry of oxazoles, the stereochemistry of the synthesis of alkenes, the synthesis of abscisic acid and of dibenzophospholes as mimics of enzyme action, is reviewed. PMID:26601337

  2. Biographical sketch: John Albert Key, 1890-1955.

    PubMed

    Brand, Richard A

    2013-07-01

    This biographical sketch on John Albert Key corresponds to the historic text, The Classic: Epiphyseal coxa vara or displacement of the capital epiphysis of the femur in adolescence, available at DOI 10.1007/s11999-013-2913-y.

  3. 3. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY PHOTOGRAPHER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY - PHOTOGRAPHER - MARCH 16, 1934 INTERIOR SHOWING SOUTH TRUSS - Whitewater Canal Aqueduct, Spanning Duck Creek, Whitewater Canal (carried over creek) (Changed from Duck Creek), Metamora, Franklin County, IN

  4. 4. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY PHOTOGRAPHER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY - PHOTOGRAPHER - MARCH 16, 1934 DETAIL OF NORTHWEST CORNER - Whitewater Canal Aqueduct, Spanning Duck Creek, Whitewater Canal (carried over creek) (Changed from Duck Creek), Metamora, Franklin County, IN

  5. 1. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY PHOTOGRAPHER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY - PHOTOGRAPHER - MARCH 16, 1934 GENERAL VIEW FROM SOUTHWEST - Whitewater Canal Aqueduct, Spanning Duck Creek, Whitewater Canal (carried over creek) (Changed from Duck Creek), Metamora, Franklin County, IN

  6. 2. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY PHOTOGRAPHER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. HISTORIC AMERICAN BUILDINGS SURVEY JOHN R. KELLEY - PHOTOGRAPHER - MARCH 16, 1934 VIEW OF NORTH SIDE - Whitewater Canal Aqueduct, Spanning Duck Creek, Whitewater Canal (carried over creek) (Changed from Duck Creek), Metamora, Franklin County, IN

  7. 19. Historic American Buildings Survey, John O. Brostrup, Photographer November ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Historic American Buildings Survey, John O. Brostrup, Photographer November 4, 1937 1:40 P.M. VIEW OF SOUTHWEST CORNER OF SPINNING ROOM ON THIRD FLOOR OF SARON. - The Cloisters, Saron, Ephrata, Lancaster County, PA

  8. Photograph of John Fedak, marine coppersmith, brazing a funner splice ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photograph of John Fedak, marine coppersmith, brazing a funner splice in the process of making a funnel. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Pipe Coppersmith Shop, League Island, Philadelphia, Philadelphia County, PA

  9. John Howard, England's Great Prison Reformer: His Glimpse into Hell.

    ERIC Educational Resources Information Center

    Roberts, Leonard H.

    1985-01-01

    Describes the life and work of John Howard, the great English prison reformer, who pioneered in exposing certain inequities of the English social system through his publications, his investigation of prison conditions first hand, and his appearances before Parliament. (CT)

  10. 4. Historic American Buildings Survey John R. Stinson, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey John R. Stinson, Photographer May 2, 1978 SOUTH (SIDE) ELEVATION SHOWING RELATIONSHIP TO URBAN ENVIRONMENT - Central School, 14403 East Pacific Avenue, Baldwin Park, Los Angeles County, CA

  11. 7. Historic American Buildings Survey, John T. Murray, Photographer, May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey, John T. Murray, Photographer, May 6, 1936. DETAIL OF HOIST IN ATTIC. - Fort Smith, Commissary Building, 100 South Garrison Avenue, Fort Smith, Sebastian County, AR

  12. 6. Historic American Buildings Survey, John T. Murray, Photographer, May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey, John T. Murray, Photographer, May 6, 1936. TYPICAL FIRST FLOOR FIREPLACE, NORTHWEST WALL. - Fort Smith, Commissary Building, 100 South Garrison Avenue, Fort Smith, Sebastian County, AR

  13. 14. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Historic American Buildings Survey John O. Brostrup, Photographer April 6, 1936 11:45 A. M. VIEW FROM WEST (front) - Thomas Law House, 1252 Sixth Street Southwest, Washington, District of Columbia, DC

  14. 16. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Historic American Buildings Survey John O. Brostrup, Photographer March 2, 1937 10:00 A. M. DETAIL OF CORNICE. - Thomas Law House, 1252 Sixth Street Southwest, Washington, District of Columbia, DC

  15. 9. Photocopy of 1867 stereograph. Original in library of John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Photocopy of 1867 stereograph. Original in library of John S. Lehmann Building, Missouri Botanical Garden. VIEW FROM NORTHWEST - Missouri Botanical Garden, Museum, 2345 Tower Grove Avenue, Saint Louis, Independent City, MO

  16. 12. Photocopy of 1889 photograph. Original in library of John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Photocopy of 1889 photograph. Original in library of John S. Lehmann Building, Missouri Botanical Garden. HENRY SHAW LYING IN STATE, SHOWING STAIRWAY BEFORE ALTERATION - Missouri Botanical Garden, Museum, 2345 Tower Grove Avenue, Saint Louis, Independent City, MO

  17. 13. Photocopy of 1931 photograph. Original in library of John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Photocopy of 1931 photograph. Original in library of John S. Lehmann Building, Missouri Botanical Garden. VIEW SHOWING ALTERED STAIRWAY AND ADDED COLUMNS - Missouri Botanical Garden, Museum, 2345 Tower Grove Avenue, Saint Louis, Independent City, MO

  18. 10. Photocopy of 1867 photograph. Original in library of John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Photocopy of 1867 photograph. Original in library of John S. Lehmann Building,Missouri Botanical Garden. VIEW FROM THE SOUTHWEST, SHOWING ORIGINAL SOUTH DOOR TREATMENT - Missouri Botanical Garden, Museum, 2345 Tower Grove Avenue, Saint Louis, Independent City, MO

  19. 15. Photocopy of unexecuted competition drawing signed 'John Notman, Architect, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of unexecuted competition drawing signed 'John Notman, Architect, Philadelphia', circa 1854, from Historical Society of Pennsylvania), EAST ELEVATION - American Academy of Music, 232-246 South Broad Street, Philadelphia, Philadelphia County, PA

  20. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TWENTY-SIXTH FLOOR EXISTING CONDITIONS SHOWING STRUCTURE AND BRACING, FACING SOUTHEAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  1. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TWENTY-SIXTH FLOOR EXISTING CONDITIONS SHOWING STRUCTURE AND BRACING, FACING NORTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  2. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TWENTY-SIXTH FLOOR EXISTING CONDITIONS SHOWING STRUCTURE AND BRACING, FACING NORTHEAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  3. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL TWENTY-SIXTH FLOOR EXISTING CONDITIONS SHOWING STRUCTURE AND BRACING, FACING SOUTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  4. Unit 4, downstream from Johns Street Bridge Johnstown Local ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Unit 4, downstream from Johns Street Bridge - Johnstown Local Flood Protection Project, Beginning on Conemaugh River approx 3.8 miles downstream from confluence of Little Conemaugh & Stony Creek Rivers at Johnstown, Johnstown, Cambria County, PA

  5. Unit 4, upstream from Johns Street Bridge Johnstown Local ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Unit 4, upstream from Johns Street Bridge - Johnstown Local Flood Protection Project, Beginning on Conemaugh River approx 3.8 miles downstream from confluence of Little Conemaugh & Stony Creek Rivers at Johnstown, Johnstown, Cambria County, PA

  6. 2. Historic American Buildings Survey John O. Brostrup, Photographer October ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey John O. Brostrup, Photographer October 20, 1936 12:55 P. M. VIEW OF BARN FROM SOUTHWEST - Samuel Gaither Barn, 3101 Mount Carmel Cemetery Road, Unity, Montgomery County, MD

  7. 1. Historic American Buildings Survey John O. Brostrup, Photographer October ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, Photographer October 20, 1936 12:50 P. M. VIEW FROM SOUTHWEST (front) - Samuel Gaither House, 3101 Mount Carmel Cemetery Road, Unity, Montgomery County, MD

  8. "Thoughts Concerning Education": John Locke On Teaching Speech

    ERIC Educational Resources Information Center

    Baird, John E.

    1971-01-01

    Locke's suggestions for more effective speech instruction have gone largely unnoticed. Consequently, it is the purpose of this article to consider John Locke's criticisms, theory and specific methods of speech education. (Author)

  9. John White on Philosophy of Education and Philosophy

    ERIC Educational Resources Information Center

    Siegel, Harvey

    2014-01-01

    John White offers a provocative characterization of philosophy of education. In this brief reaction, I evaluate the characterization and urge the maintenance of a strong connection between philosophy of education and philosophy.

  10. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL TENTH FLOOR NORTH OFFICE WING SHOWING RADIATOR AND WINDOW, FACING EAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  11. John Ash, ALA., Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, ALA., Photographer August 1997. VIEW OF LOS ANGELES CITY HALL NINTH FLOOR NORTH OFFICE WING SHOWING PARTITIONS, WINDOWS AND RADIATOR, FACING SOUTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  12. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL NINTH FLOOR NORTH OFFICE WING SHOWING PARTITIONS, WINDOWS AND RADIATOR, FACING EAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  13. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL TENTH FLOOR SOUTH WING CAFETERIA LIGHT FIXTURE, FACING SOUTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  14. Interaction of St John's wort (Hypericum perforatum) with clozapine.

    PubMed

    Van Strater, Annelies C P; Bogers, Jan P A M

    2012-03-01

    St John's wort (Hypericum perforatum) is notorious for its ability to induce the enzymes of the P450 system. Especially, it induces CYP1A2 and CYP3A4, enzymes that are closely involved in the metabolism of clozapine. We present a patient with schizophrenia, who was stable on a fixed dose with stable plasma level of clozapine, and who deteriorated after she started self-medicating with St John's wort. The reduced plasma clozapine level and the psychiatric condition normalized after the withdrawal of St John's wort. It is possible that, beside the induction of P450-enzymes, the induction of P-glycoprotein by St John's wort aggravated psychiatric deterioration of the patient. Physicians should be alert to patients self-medicating with over-the-counter medicines, especially when these medicines can lower clozapine concentrations below the therapeutic range.

  15. 1. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey John O. Brostrup, Photographer April 21, 1936 11:15 A. M. VIEW FROM NORTHEAST (front) - Poplar Neck, U.S. Naval Research Station, Dangerfield Road, Cheltenham, Prince George's County, MD

  16. John C. P. Williams of Williams-Beuren syndrome.

    PubMed

    Lenhoff, Howard M; Teele, Rita L; Clarkson, Patricia M; Berdon, Walter E

    2011-02-01

    John C.P. Williams of New Zealand, whose name is associated with Williams-Beuren syndrome, spent his known professional career primarily in cardiovascular research. His disappearance in the mid-1970s and his later life remain a mystery.

  17. Exploring the Universe with John Milton and Mary Shelley.

    ERIC Educational Resources Information Center

    Poston, David

    1989-01-01

    Presents an approach to teaching John Milton's "Paradise Lost" in conjunction with Mary Shelley's "Frankenstein." Notes that a study of these works stimulates vigorous discussions on theological and moral issues, human nature, and the cultural past and future. (MM)

  18. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL THIRD FLOOR CITY COUNCIL CHAMBERS SHOWING COLUMN, ARCADE AND SPECTATOR SEATING, FACING SOUTHWEST. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  19. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL THIRD FLOOR CITY COUNCIL CHAMBERS SHOWING PODIUM AND SEATING, FACING SOUTH. - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  20. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL THIRD FLOOR CITY COUNCIL CHAMBERS SHOWING COLUMN, ARCADE AND SPECTATOR SEATING, FACING SOUTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  1. Micmac People of Newfoundland: An Interview with Marilyn John

    ERIC Educational Resources Information Center

    Gray, Viviane

    1976-01-01

    Marilyn John, vice-president of the Native Association of Newfoundland and Labrador discusses what the Native Association is doing for the Micmac Indians, the Micmacs' attitudes about their old cultural ways, the Micmac language, and the Micmacs' future. (NQ)

  2. Astronaut John Fabian show off signs on aft flight deck

    NASA Technical Reports Server (NTRS)

    1985-01-01

    Astronaut John Fabian, payload specialist, show off a series of signs on the aft flight deck of Discovery, from whose payload bay three communications satellites were deployed. The sign reads 'We deliver and deliver and deliver...'

  3. STS-79 Mission Specialist John Blaha in White Room

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-79 Mission Specialist John E. Blaha shares a light moment with white room closeout crew members Rick Welty (No. 1) and Jim Davis (right), before entering the Space Shuttle Atlantis at Launch Pad 39A.

  4. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL SEVENTH FLOOR CORRIDOR NEAR ELEVATOR LOBBY SHOWING FIRE HOSE CABINET, FACING EAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  5. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL FIFTH FLOOR NORTH OFFICE AREA, FACING NORTHEAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  6. John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. DETAIL OF LOS ANGELES CITY HALL SEVENTH FLOOR SOUTH OFFICE AREA SHOWING RADIATOR AND WINDOWS, FACING EAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  7. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL SEVENTH FLOOR SOUTH OFFICE AREA SHOWING WOOD AND GLASS PARTITIONS, FACING SOUTHEAST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  8. John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    John Ash, AIA, Photographer August 1997. VIEW OF LOS ANGELES CITY HALL SEVENTH FLOOR SOUTH OFFICE AREA SHOWING STRUCTURAL PIERS AND FLORESCENT LIGHTS, FACING NORTHWEST - Los Angeles City Hall, 200 North Spring Street, Los Angeles, Los Angeles County, CA

  9. 4. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey John O. Brostrup, Photographer March 30, 1936 12:50 P. M. VIEW FROM SOUTHWEST - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  10. 12. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Historic American Buildings Survey John O. Brostrup, Photographer April 20, 1936 9:45 A.M. ® NORTHEAST BEDROOM (north wall) - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  11. 12. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 2:15 P.M. VIEW OF STAIR, WEST CORNER OF ENTRANCE HALL. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  12. 8. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 1:15 P.M. DETAIL OF DOOR, NORTHEAST ELEVATION. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  13. 10. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 3:15 P.M. DETAIL OF DOOR, ENTRANCE HALL, SOUTHEAST WALL. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  14. 4. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 12:30 P.M. DETAIL OF WINDOWS FROM SOUTH. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  15. 14. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 2:45 P.M. DETAIL OF GRAINING ON PANELED DOOR. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  16. 11. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 3:25 P.M. DETAIL OF ARCH, ENTRANCE HALL, SOUTHEAST WALL. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  17. 14. Historic American Buildings Survey John O. Brostrup, Photographer Oct. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Historic American Buildings Survey John O. Brostrup, Photographer Oct. 12, 1936 9:15 A.M. Detail of West Wall of Basement - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  18. 11. Historic American Buildings Survey John O. Brostrup, Photographer Oct. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey John O. Brostrup, Photographer Oct. 12, 1936 9:25 A.M. VIEW FROM SOUTHEAST - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  19. 13. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Historic American Buildings Survey John O. Brostrup, Photographer April 20, 1936 9:50 A.M. ® NORTHEAST BEDROOM (east wall) - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  20. 17. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 4:30 P.M. DETAIL OF WINDOW, NORTHWEST WALL. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  1. 7. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey John O. Brostrup, Photographer April 20, 1936 9:30 A.M. BRICK (east) GABLE VIEW - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  2. 10. Historic American Buildings Survey John O. Brostrup, Photographer March ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey John O. Brostrup, Photographer March 30, 1936 10:00 A.M. DETAIL FROM SOUTHEAST - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  3. 6. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer April 29, 1936 11:10 A.M. VIEW FROM NORTHEAST (front) - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  4. 13. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 2:30 P.M. DETAIL OF PANELED DOOR. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  5. 9. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 3:45 P.M. DETAIL OF DOOR, NORTHEAST WALL. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  6. 6. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 1:45 P.M. DETAIL OF SOUTHEAST ELEVATION. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  7. 16. Historic American Buildings Survey John O. Brostrup, Photographer May ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Historic American Buildings Survey John O. Brostrup, Photographer May 6, 1937 4:00 P.M. VIEW OF NORTHEAST WALL OF BEDROOM. - Holly Hill, Southeast of Friendship off MD 631, Friendship, Anne Arundel County, MD

  8. 9. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey John O. Brostrup, Photographer April 20, 1936 10:00 A.M. VIEW FROM SOUTHEAST - Friendship, Kolbies Corner, State Routes 214 & 556, Largo, Prince George's County, MD

  9. 7. Historic American Buildings Survey John O. Brostrup, Photographer April ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Historic American Buildings Survey John O. Brostrup, Photographer April 30, 1936 1:50 P. M. VIEW FROM SOUTHEAST (front) - Dr. David Ross House, Annapolis Road (moved to Preservation Hill, Western Run Road, Cockeysville), Bladensburg, Prince George's County, MD

  10. 1. VIEW NORTHNORTHEAST OF CARRIER JOHN F. KENNEDY (JFK) IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW NORTH-NORTHEAST OF CARRIER JOHN F. KENNEDY (JFK) IN DRYDOCK NO. 5 FOR SERVICE LIFE EXTENSION PROGRAM (SLEP). - Naval Base Philadelphia-Philadelphia Naval Shipyard, Dry Dock No. 5, League Island, Philadelphia, Philadelphia County, PA

  11. NES Live Video Chat: Dr. John C. Mather

    NASA Video Gallery

    NES welcomed Nobel Prize winner Dr. John C. Mather for a video webchat on May 17, 2011. He spoke about the James Webb Space Telescope and how it gives us a look into the past to see how galaxies ha...

  12. The Politics of Composition: A Reply to John Rouse.

    ERIC Educational Resources Information Center

    Graff, Gerald

    1980-01-01

    Responds to an essay on "the politics of composition" by John Rouse (see EJ 209 264), who interpreted Mina Shaughnessy's teaching strategies as being political conditioning and suppressing student freedoms. Defends Shaughnessy's methods while seeking to refute Rouse's argument. (JT)

  13. Microfilmed Records in the John Fitzgerald Kennedy Library.

    ERIC Educational Resources Information Center

    Whealan, Ronald E.

    1988-01-01

    Discusses the planning and implementation of a program to acquire copies of personal papers and federal records for deposit in the John F. Kennedy Library. The current status of the library's microfilm collections is described. (nine references) (MES)

  14. Mercury astronaut John Glenn and President Kennedy at survival display

    NASA Technical Reports Server (NTRS)

    1962-01-01

    Mercury astronaut John H. Glenn Jr. gives President Kennedy a quick run-down on the display of survival gear. The Chief Executive took a quick tour of a dozen displays set up for him after the classified briefing.

  15. 6. Historic American Buildings Survey John O. Brostrup, Photographer September ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Historic American Buildings Survey John O. Brostrup, Photographer September 4, 1936 10:50 A. M. VIEW OF SLAVE QUARTERS FROM SOUTHWEST (front.) - Rock Hall & Slave Quarters, Dickerson, Montgomery County, MD

  16. 21. Historic American Buildings Survey John O. Brostrup Nov. 17, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Historic American Buildings Survey John O. Brostrup Nov. 17, 1936 10:00 A.M. DETAIL OF INTERIOR SIDE OF ENTRANCE DOOR - The Maples, 630 South Carolina Avenue Southeast, Washington, District of Columbia, DC

  17. 23. Historic American Buildings Survey John O. Brostrup, Photographer Nov. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Historic American Buildings Survey John O. Brostrup, Photographer Nov. 17, 1936 9:30 A.M. SOUTHWEST CORNER OF SOUTHEAST ROOM (DRAWING ROOM) - The Maples, 630 South Carolina Avenue Southeast, Washington, District of Columbia, DC

  18. 24. Historic American Buildings Survey John O. Brostrup, Photographer Nov. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Historic American Buildings Survey John O. Brostrup, Photographer Nov. 17, 1936 9:40 A.M. DETAIL OF DOOR TO BALL ROOM (OR MUSIC ROOM) - The Maples, 630 South Carolina Avenue Southeast, Washington, District of Columbia, DC

  19. 22. Historic American Buildings Survey John O. Brostrup, Photographer Nov. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Historic American Buildings Survey John O. Brostrup, Photographer Nov. 17, 1936 9:10 A.M. DETAIL OF STAIR -- Entrance Hall. - The Maples, 630 South Carolina Avenue Southeast, Washington, District of Columbia, DC

  20. 11. Photocopy of 1893 photograph. Original in library of John ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Photocopy of 1893 photograph. Original in library of John S. Lehmann Building, Missouri Botanical Garden. MUSEUM AND GARDEN GATE FROM THE NORTHEAST - Missouri Botanical Garden, Museum, 2345 Tower Grove Avenue, Saint Louis, Independent City, MO

  1. Educational Innovation: The John Wood Community College System Explained

    ERIC Educational Resources Information Center

    Heath, Paul R.; Astroth, Jonathan M.

    1977-01-01

    By contracting with existing institutions to provide education for its students, the John Wood Community College in Quincy, Illinois, meets the needs of 2,000 students while employing only seven faculty members and owning no buildings. (IRT)

  2. Alexander von Humboldt: a revolutionary explorer.

    PubMed

    Fara, Patricia

    2008-03-01

    After he returned from his five-year expedition to the New World, Alexander von Humboldt promoted himself as a Romantic explorer. Although this image pervades British perceptions, political movements have fashioned different heroic versions of Humboldt in Germany and South America.

  3. Dr. von Braun Visits Huntsville Boys Club

    NASA Technical Reports Server (NTRS)

    1961-01-01

    Dr. von Braun, Director of Marshall Space Flight Center (MSFC) and chairman of this year's United Givers Fund (UGF) drive at MSFC, takes time out from the problems of sending a man to the Moon to talk baseball with 11-year-old Randy Smith at the Huntsville Boys Club.

  4. Dr. Wernher Von Braun presents a certificate

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Dr. Wernher Von Braun (left), director of the Marshall Space Flight Center, presents a humorous certificate to Major General Charles W. Eifler, commanding general of Redstone Arsenal, at the close of a farewell luncheon for the general prior to General Eifler moving to a new European duty station.

  5. Dr. von Braun Discusses 'Bottle Suit' Concept

    NASA Technical Reports Server (NTRS)

    1954-01-01

    Dr. Wernher von Braun (center), then Chief of the Guided Missile Development Division at Redstone Arsenal, Alabama, discusses a 'bottle suit' model with Dr. Heinz Haber (left), an expert on aviation medicine, and Willey Ley, a science writer on rocketry and space exploration. The three men were at the Disney studios appearing in the motion picture, entitled 'Man in Space.'

  6. Von Gierke's disease: report of case.

    PubMed

    Cudzinowski, L

    1979-01-01

    Von Gierke's disease, or hepatorenal glycogenesis, type I, presents an interesting challenge to the dental practitioner. Showing an incidence of 1/400,000, it is a fairly rare occurrence. It indicates the importance of proper medical consultation in treating these children, and proper dental treatment and preventive programs to alleviate what could be dangerous for these patients. PMID:289662

  7. Herstellung von Chitosan und einige Anwendungen

    NASA Astrophysics Data System (ADS)

    Struszczyk, Marcin Henryk

    2001-05-01

    1. Die Deacetylierung von crabshell - Chitosan führte gleichzeitig zu einem drastischen Abfall der mittleren viscosimetrischen Molmasse ( Mv), insbesondere wenn die Temperatur und die Konzentration an NaOH erhöht werden. Diese Parameter beeinflussten jedoch nicht den Grad der Deacetylierung (DD). Wichtig ist jedoch die Quelle des Ausgangsmaterials: Chitin aus Pandalus borealis ist ein guter Rohstoff für die Herstellung von Chitosan mit niedrigem DD und gleichzeitig hoher mittlerer Mv, während Krill-Chitin (Euphausia superba) ein gutes Ausgangsmaterial zur Herstellung von Chitosan mit hohem DD und niedrigem Mv ist. Chitosan, das aus Insekten (Calliphora erythrocephala), unter milden Bedingungen (Temperatur: 100°C, NaOH-Konzentration: 40 %, Zeit: 1-2h ) hergestellt wurde, hatte die gleichen Eigenschaften hinsichtlich DD und Mv wie das aus Krill hergestellte Chitosan. Der Bedarf an Zeit, Energie und NaOH ist für die Herstellung von Insekten-Chitosan geringer als für crabshell-Chitosan vergleichbare Resultaten für DD und Mv. 2. Chitosan wurde durch den Schimmelpilz Aspergillus fumigatus zu Chitooligomeren fermentiert. Die Ausbeute beträgt 25%. Die Chitooligomere wurden mit Hilfe von HPLC und MALDI-TOF-Massenspektrmetrie identifiziert. Die Fermentationsmischung fördert die Immunität von Pflanzen gegen Bakterien und Virusinfektion. Die Zunahme der Immunität schwankt jedoch je nach System Pflanze-Pathogen. Die Fermentation von Chitosan durch Aspergillus fumigatus könnte eine schnelle und billige Methode zur Herstellung von Chitooligomeren mit guter Reinheit und Ausbeute sein. Eine partiell aufgereinigte Fermentationsmischung dieser Art könnte in der Landwirtschaft als Pathogeninhibitor genutzt werden. Durch kontrollierte Fermentation, die Chitooligomere in definierter Zusammensetzung (d.h. definierter Verteilung des Depolymerisationsgrades) liefert, könnte man zu Mischungen kommen, die für die jeweilige Anwendung eine optimale Bioaktivität besitzen. 3

  8. St. John's wort for the treatment of psychiatric disorders.

    PubMed

    Sarris, Jerome

    2013-03-01

    St. John's wort (Hypericum perforatum) has been extensively studied and reviewed for its use in depression; however, there is less salient discussion on its clinical application for a range of other psychiatric disorders. This article outlines the current evidence of the efficacy of St John's wort in common psychiatric disorders, including major depression, bipolar depression, attention-deficit hyperactivity disorder, obsessive-compulsive disorder, social phobia, and somatization disorder. Mechanisms of action, including emerging pharmacogenetic data, safety, and clinical considerations are also detailed.

  9. 1. John C. Garner, Jr., Photographer 1967 PRINCIPAL (NORTH) SIDE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. John C. Garner, Jr., Photographer 1967 PRINCIPAL (NORTH) SIDE, FROM NORTHWEST. THE RIGHT END OF THE BLOCK IS THE E.S. WOOD BUILDING; THE BUILDING WITH A FIRE ESCAPE IS THE ROSENFIELD BUILDING; THE T.W. HOUSE BUILDING IS TO THE LEFT OF THE PRECEDING BUILDING; JOHN BERLOCHER BUILDING IS AT THE LEFT END OF THE BLOCK. - Strand Historic District, Wood-Rosenfield-House-Berlocher Buildings, 2213-2223 Strand, Galveston, Galveston County, TX

  10. WATERCOLOR RENDERING OF CABIN JOHN BRIDGE SCAFFOLDING. CAPTAIN M.C. MEIGS, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    WATERCOLOR RENDERING OF CABIN JOHN BRIDGE SCAFFOLDING. CAPTAIN M.C. MEIGS, CHIEF ENGINEER; ALFRED RIVES, ASSISTANT ENGINEER, DELINEATOR. NOVEMBER 30, 1859 - Cabin John Aqueduct Bridge, MacArthur Boulevard, spanning Cabin John Creek at Parkway, Cabin John, Montgomery County, MD

  11. 75 FR 37462 - Official Trail Marker for the Captain John Smith Chesapeake National Historic Trail

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-29

    ... National Park Service Official Trail Marker for the Captain John Smith Chesapeake National Historic Trail....S.C. 701. SUMMARY: This notice issues the official trail marker insignias of the Captain John Smith... John Maounis, Superintendent, Captain John Smith Chesapeake National Historic Trail. The...

  12. John Tuzo Wilson (1908-1993)

    NASA Astrophysics Data System (ADS)

    The Spring 1993 meeting of the American Geophysical Union in Baltimore was to have been treated to a contributed paper by one of the Union's most eminent Past Presidents (1980-1982), a Canadian, John Tuzo Wilson, then in his 85th year. It is an interesting footnote to AGU history that, having elected Wilson to its Presidency and having discovered that this violated its constitution, the Union changed its constitution. At the Baltimore meeting, Wilson's paper, entitled “The Neglect of Migrating Plumes as a Major Weakness in the Earth Sciences”, was to have been read in a session on Tectonophysics. With it, as he had assured me some months before in the tea room of the Geophysics Laboratory at Toronto, he intended to further announce his return to the continuing debates surrounding the mobilist view of the Earth that his own work, three decades before, had played such an important role in establishing. Although the period in Wilson's life from the early 1970s until the late 1980s was devoted to a daunting array of administrative duties, he never lost the deep love for the Earth sciences that had always motivated his research career. To the end of his life, he remained a man of ideas and intellect with an enduring capacity to feel absolute delight in the discovery of new truths about the Earth. He is a person now greatly missed by legions of colleagues and friends internationally, by the University of Toronto, which he served with such distinction from 1946 onward and by his country to which, by the time of his passing, he had become a cultural icon.

  13. John Frassanito &Associates: Designer for Space Travel

    NASA Astrophysics Data System (ADS)

    Zukowsky, John

    2002-01-01

    When most people think of design for space travel they think immediately of engineers and scientists, not architects or industrial designers. Yet, one of those arts professionals has been at the center of creating "space" in space for almost four decades. John Frassanito (born 1941) is an industrial designer who trained at the Art Center (now the famous Art Center College of Design in Pasadena) in the mid 1960s. After graduation in 1968, he began his design career by working with Raymond Loewy and William Snaith at the same time that Loewy's office was designing the interiors of Skylab, America's first space station (launched 1973). Frassanito worked on Skylab while at the Loewy firm until the early 1970s, when he was hired as a designer within the Computer Terminal Corporation where, in 1972, he designed the Datapoint 2000 -- the computer that the journal Invention and Technology (Fall 1994) called the "direct ancestor of today's PC." Frassanito started his own firm in 1983, where he continued to design computers as well as products for companies such as Sani-Fresh and Scott Paper. But he has made his mark on design for space travel since the mid-1980s, where he has been an outside contractor who has worked on a variety of NASA projects through today. These include 1980s works such as interior configuration and design for Space Station Freedom, as well as concepts for inflatable TransHab structures, through 1990s computer- generated animations for NASA missions, real and conceptual. In fact, Frassanito's high quality of design and animated imaging has been consistently utilized by NASA over the past decade to present mission realities and future concepts to scientists, engineers, lawmakers, and the general public alike. A survey of his work will be the subject of this paper in an effort to document the essential role that visual arts professionals play in designing "space" for space.

  14. Obituary: John P. Davidson (1924-2010)

    NASA Astrophysics Data System (ADS)

    Twarog, Bruce; Anthony-Twarog, Barbara

    2011-12-01

    Nuclear physicist and astrophysicist John P. Davidson died at his home on January 10, 2010. He was born on July 22, 1924 in Los Angeles, California. Jack followed his high school interests in rocketry and physical science to the University of California, Berkeley, where he earned a Bachelor of Science degree in physics in June 1948 after serving a stint from 1943 to 1946 in the Army Signal Corps in the European Theater of Operations. Following the war and graduation, Jack embarked on a graduate career in nuclear physics at Washington University, St. Louis. While there, he also initiated what became a life-long partnership with Mary Reiser dedicated to issues of social justice by co-founding an organization to lobby for university admission of African-American students, a policy change opposed by physicist and Chancellor, Arthur Holly Compton. Mary and Jack married in 1949. Jack Davidson's academic career began shortly after completion of his PhD in 1952 under Eugene Feenberg. He taught in Brazil and in Norway before becoming an assistant professor at Rensselaer Polytechnic Institute in 1957. He stayed at RPI until 1966, at which time he joined the faculty of the University of Kansas where he served faculty and students until his retirement in 1996. His teaching, research and administrative career at KU was distinguished by a growing commitment to the astronomy and astrophysics program. Not only did he foster its growth during his tenure as department chair (1977-1989), he directed a residential summer science program in astronomy for high school students at KU for nearly 10 years in the 1970's. He combined his background in nuclear physics and his fascination with astrophysics into a research program to study elemental abundance anomalies in stellar spectra, authoring with Don Bord several pioneering applications of wavelength coincidence statistics to the ultraviolet spectra of peculiar A stars. At KU, Jack assumed leadership roles in the local chapter of Phi Beta

  15. From the classical to the generalized von Karman and Marguerre-von Karman equations

    NASA Astrophysics Data System (ADS)

    Ciarlet, Philippe G.; Gratie, Liliana

    2006-06-01

    In this work, we describe and analyze two models that were recently proposed for modeling generalized von Karman plates and generalized Marguerre-von Karman shallow shells.First, we briefly review the "classical" von Karman and Marguerre-von Karman equations, their physical meaning, and their mathematical justification. We then consider the more general situation where only a portion of the lateral face of a nonlinearly elastic plate or shallow shell is subjected to boundary conditions of von Karman type, while the remaining portion is free. Using techniques from formal asymptotic analysis, we obtain in each case a two-dimensional boundary value problem that is analogous to, but is more general than, the classical equations.In particular, it is remarkable that the boundary conditions for the Airy function can still be determined on the entire boundary of the nonlinearly elastic plate or shallow shell solely from the data.Following recent joint works, we then reduce these more general equations to a single "cubic" operator equation, which generalizes an equation introduced by Berger and Fife, and whose sole unknown is the vertical displacement of the shell. We next adapt an elegant compactness method due to Lions for establishing the existence of a solution to this operator equation.

  16. Obituary: Michael John Seaton, 1923-2007

    NASA Astrophysics Data System (ADS)

    Pradhan, Anil; Nahar, Sultana

    2007-12-01

    Professor Michael John Seaton, hailed as the "Father of Atomic Astrophysics," passed away on May 29, 2007. He was one of the few Honorary Fellows of both the American Astronomical Society and the American Physical Society, so honored for his monumental contributions to both physics and astronomy. Mike Seaton was born on January 16, 1923 in Bristol, England. He attended Wallington County High School. But his leftist political activities, even at that stage, led to his expulsion, though he was eventually allowed to matriculate. He enlisted in the Royal Air Force as a navigator during the Second World War, and flew many dangerous missions. His legendary concentration and precision are reflected in the following anecdote. Once after a bombing mission his aircraft was lost in fog over the Alps. Seaton calculated the position and coordinates in flight to guide the aircraft. When the fog lifted, the crew found themselves flying perilously close to the mountains, but made it safely back. His associates often said, "A Seaton calculation is carried out as if his life depended on it." After the War he was admitted to University College London (UCL) as an undergraduate. Thereafter, he spent all of his professional career at UCL. Seaton received his Batchelor's degree in 1948, and his Ph.D. in 1951. His tenure at UCL coincided with the golden age of atomic astrophysics, for he was largely responsible for it. Seaton was elected Fellow of the Royal Society in 1967, and as President of the Royal Astronomical Society (RAS) in 1978. He was the recipient of an Honorary Doctorate from the Observatoire de Paris, an Honorary D.Sc. from the Queen's University of Belfast, the Gold Medal for Astronomy by the RAS, the Guthrie Medal by the Institute of Physics, the Royal Society Hughes award for lifetime work by the RAS, and several other prestigious awards. Nevertheless, as Alex Dalgarno recently remarked, Seaton was not part of the establishment because he chose not to be. Though rooted in

  17. Obituary: Michael John Klein, 1940-2005

    NASA Astrophysics Data System (ADS)

    Gulkis, Samuel

    2006-12-01

    Michael John Klein died on 14 May 2005 at home in South Pasadena, California. The cause of death was tongue cancer that metastasized to the lungs. He was a non-smoker. Mike was a passionate radio astronomer, a trusted astronomical observer, an educator and a family man. Mike was born on 19 January 1940 in Ames, Iowa, the son of Florence Marie (Graf) and Fred Michael Klein. His mother was a homemaker, and his father was a banker. Mike had two older sisters, Lois Jean (Klein) Flauher and Marilyn June (Klein) Griffin. In 1962, Mike married his high school sweetheart Barbara Dahlberg, who survives him along with their three children, Kristin Marie (Klein) Shields, Michael John Klein Jr., Timothy Joel Klein, and six grandchildren. Mike developed a love for astronomy early in his life, and credited an early morning, newspaper-delivery route that he had at age twelve, which took him outside well before sunrise. He told family members that as he walked along his route, he stared into the sky and wondered what everything was. He studied sky charts, located stars, and began to understand how the planets shifted their positions relative to the stars each day. Another big influence in Mike's life was his brother in-law, Jim Griffin. Jim helped Mike understand that his passion for science did not have to remain a hobby, but could and should become a career. Jim's encouragement led Mike to attend Iowa State University in Ames, where he earned a BS in electrical engineering in 1962. Mike then started graduate school in electrical engineering at Michigan State, but after one semester transferred to the University of Michigan, Ann Arbor, where he earned an MS (1966) and PhD (1968) in astronomy. His doctoral dissertation, under the direction of Professor Fred Haddock, was based on extensive observations of the planets and examined the physical and thermal properties of planetary atmospheres and surfaces. Mike was awarded a Resident Research Associate position at JPL by the National

  18. Obituary: John Louis Africano III, 1951-2006

    NASA Astrophysics Data System (ADS)

    Barker, Edwin, S.

    2007-12-01

    The orbital debris, space surveillance, and astronomical communities lost a valued and beloved friend when John L. Africano passed away on July 27, 2006, at the young age of 55. John passed away in Honolulu, Hawaii, from complications following a heart attack suffered while playing racquetball, which was his avocation in life. Born on February 8, 1951, in Saint Louis, Missouri, John graduated with a B.S. in Physics from the University of Missouri at Saint Louis in 1973, and received a Master's degree in Astronomy from Vanderbilt University in 1974. John had a real love for astronomical observing and for conveying his many years of experience to others. He encouraged many young astronomers and mentored them in the basics of photometry and astronomical instrumentation. John was author or co-author on nearly one-hundred refereed publications ranging from analyses of cool stars to the timing of occultations to space surveillance. He was honored for his contributions to minor planet research when the Jet Propulsion Laboratory named Minor Planet 6391 (Africano) after him. John held operational staff positions at several major observatories including McDonald Observatory in Texas, Kitt Peak National Observatory in Arizona, and the Cloudcroft Telescope Facility in New Mexico. He observed at numerous observatories worldwide, including Cerro Tololo Inter-American Observatory (CTIO) in Chile, developing a world-wide network of friends and colleagues. John's ability to build diverse teams through his managerial and technical skills, not to mention his smiling personality, resulted in numerous successes in the observational astronomy and space surveillance arenas. As an astronomer for Boeing LTS Inc., he worked for many years at the Advanced Maui Optical and Space Surveillance site (AMOS) on Maui, Hawaii, where he contributed his operational and instrumental expertise to both the astronomy and space surveillance communities. He was also the co-organizer of the annual AMOS

  19. Inattentional blindness and the von Restorff effect.

    PubMed

    Schmidt, Stephen R; Schmidt, Constance R

    2015-02-01

    Sometimes we fail to notice distinctive or unusual items (inattentional blindness), while other times we remember distinctive items more than expected items (the von Restorff effect). A three-factor framework is presented and tested in two experiments in an attempt to reconcile these seemingly contradictory phenomena. Memory for different types of unexpected stimuli was tested after an easy or difficult Stroop color-naming task. Highly arousing taboo words were well remembered even when the difficult Stroop task limited attentional resources. However, a conceptual isolation effect was only observed when the nature of the category change was highlighted by the Stroop task, the Stroop task was easy, and/or the isolated targets enjoyed a retrieval advantage relative to comparison targets. As proposed in the three-factor framework, the arousing qualities of the stimuli, the attentional demands of the primary task, and the relevance of isolated features at encoding and retrieval combine to produce inattentional blindness and the von Restorff effect.

  20. Epithelial cells and Von Gierke's disease.

    PubMed

    Negishi, H; Benke, P J

    1977-08-01

    Epithelial cells and not fibroblasts from human liver and amniotic fluid contain inducible glucose-6-phosphatase (G-6-Pase) activity. The diagnosis of Von Gierke's disease has been made in a patient with hepatomegaly utilizing cultured epithelial cells grown from a liver biopsy. G-6-Pase activity in epithelial cells from this patient could not be induced by dibutyryl cyclic AMP and theophylline. This is the first use of epithelial cells for diagnosis of a metabolic disease. G-6-Pase activity in cloned epithelial cells from amniotic fluid increases 2- to 3-fold after 24-hr exposure to dibutyryl cyclic AMP and theophylline. The prenatal diagnosis of Von Gierke's disease may be possible in a laboratory experienced with these techniques if epithelial cell growth is obtained from amniotic fluid. PMID:196249