1,236 research outputs found

    Industrial Warehouse Rent Determinants in the Dallas/Fort Worth Area

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    This paper presents the first empirical analysis of the determinants of pooled variation in industrial warehouse rents. It examines industrial warehouse rents using data for seventeen quarterly periods in the Dallas/Fort Worth metroplex. M/PF Research Inc. provided the data. A random effects model is used to estimate the relationship between market rents for industrial properties and various independent variables. Rent per square foot is positively related to the number of grade high doors, and the annual change in net employment. Rent per square foot is negatively effected by ceiling height, percentage of office space, building age, and the presence of a sprinkler system. The results indicate that rents are significantly impacted by physical characteristics, location, and general market conditions. Additionally, there is evidence to suggest that the relationship between physical characteristics and rents is nonlinear.

    Semiclassical Strings in Electric and Magnetic Fields Deformed AdS5×S5AdS_5 \times S^5 Spacetimes

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    We first apply the transformation of mixing azimuthal and internal coordinate or mixing time and internal coordinate to the 11D M-theory with a stack N M2-branes to find the spacetime of a stack of N D2-branes with magnetic or electric flux in 10 D IIA string theory, after the Kaluza-Klein reduction. We then perform the T duality to the spacetime to find the background of a stack of N D3-branes with magnetic or electric flux. In the near-horizon limit the background becomes the magnetic or electric field deformed AdS5×S5AdS_5 \times S^5. We adopt an ansatz to find the classical string solution which is rotating in the deformed S5S^5 with three angular momenta in the three rotation planes. The relations between the classical string energy and its angular momenta are found and results show that the external magnetic and electric fluxes will increase the string energy. Therefore, from the AdS/CFT point of view, the corrections of the anomalous dimensions of operators in the dual SYM theory will be positive. We also investigate the small fluctuations in these solutions and discuss the effects of magnetic and electric fields on the stability of these classical rotating string solutions. Finally, we find the possible solutions of string pulsating on the deformed spacetimes and show that the corrections to the anomalous dimensions of operators in the dual SYM theory are non-negative.Comment: Latex 18 pages, correct sec. 3.

    Non-BPS States and Heterotic - Type I' Duality

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    There are two families of non-BPS bi-spinors in the perturbative spectrum of the nine dimensional heterotic string charged under the gauge group SO(16)×SO(16)SO(16)\times SO(16). The relation between these perturbative non-BPS states and certain non-perturbative non-BPS D-brane states of the dual type I^\prime theory is exhibited. The relevant branes include a \Zop_2 charged non-BPS D-string, and a bound state of such a D-string with a fundamental string. The domains of stability of these states as well as their decay products in both theories are determined and shown to agree with the duality map.Comment: 19 pages, LaTe

    Short‐distance monomer correlations in a self‐repelling polymer chain

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    We calculate the amplitude of the large‐wave vector scattering structure function S(q) of a long random coil in a good solvent, using field theory renormalization and expanding to first order in ϵ≡4‐ (dimension of space). This amplitude is some 35% smaller than that of a swollen Gaussian chain. This is consistent with nonrenormalization group theories and with experiment.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70497/2/JCPSA6-76-6-3300-1.pd

    Higher-derivative gauge interactions of Bagger-Lambert-Gustavsson theory in N=1 superspace

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    We study the structure of the gauge sector of the Bagger-Lambert-Gustavsson (BLG) theory in the form proposed by van Raamsdonk, adapted to 3D, N=1 superspace. By using the novel Higgs mechanism proposed by Mukhi and Papageorgakis, we derive the manifestly N=1 supersymmetric higher-order terms (beyond the supersymmetric Yang-Mills action) that follow from the BLG theory in its expansion with respect to the inverse gauge coupling constant squared. We find that all those terms have at least one anti-commutator of the super-YM field strength superfields as a factor, and thus are reducible to the SYM terms with the higher (spacetime) derivatives.Comment: 13 pages, LaTeX2e, no figures (title changed, few comments and references added

    Windfalls, Wipeouts, Givings, and Takings in Dramatic Redevelopment Projects: Bargaining for Better Zoning on Density, Views, and Public Spaces

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    Large-scale redevelopment projects such as Boston’s “Big Dig” bestow numerous public benefits—often without charge—to nearby property owners. In the case of the Big Dig, these benefits include twenty-seven acres of newly created parkland, where once an elevated freeway stood. Beyond the immediate and obvious beneficiaries are nearby landowners seeking “better zoning” that might include a relaxation of maximum height or floor area ratios to enjoy the new view. This Article explores the often hidden impact of the nearby landowners’ means of accomplishing their desired result: bargaining with municipalities for private, derivative benefits. The Article compares legislative and judicial responses to land use bargaining in California and Massachusetts, states with dramatically different approaches to land use planning. The Article concludes that bargaining in the absence of a guiding land use plan—the Massachusetts “model”—results in a chaotic land use policy and unpredictable development

    Open Semiclassical Strings and Long Defect Operators in AdS/dCFT Correspondence

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    We consider defect composite operators in a defect superconformal field theory obtained by inserting an AdS_4 x S^2-brane in the AdS_5 x S^5 background. The one-loop dilatation operator for the scalar sector is represented by an integrable open spin chain. We give a description to construct coherent states for the open spin chain. Then, by evaluating the expectation value of the Hamiltonian with the coherent states in a long operator limit, a Landau-Lifshitz type of sigma model action is obtained. This action is also derived from the string action and hence we find a complete agreement in both SYM and string sides. We see that an SO(3)_H pulsating string solution is included in the action and its energy completely agrees with the result calculated in a different method. In addition, we argue that our procedure would be applicable to other AdS-brane cases.Comment: 22 pages, 1 figure, LaTeX, minor corrections and references added. v3) some new results added. shortened and accepted version in PR

    Spatial monomer distribution for a flexible polymer in a good solvent

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    We calculate the fourth moment 〈r4〉 of the average monomer–monomer separation in a flexible linear polymer in the excluded volume limit. The ratio 〈r4〉/〈r2〉2 is a universal number expressible in terms of the exponents γ and ν. The ratio is 8% smaller for the excluded volume chain than for the ideal chain. To account for the excluded volume interaction we use field theory methods to renormalize the Mayer–Fixman cluster expansion. Our approximation method of expanding in dimension of space minus four introduces an estimated uncertainty of 1%. The end point moment ratio 〈r4e〉/〈r2e〉2 behaves similarly.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/71263/2/JCPSA6-74-4-2582-1.pd

    Renormalized field theory of polymer solutions. I. Scaling laws

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    The large scale spatial correlations in a dilute solution of long chain molecules are dominated by excluded volume effects. We extend the field‐theoretic methods of Des Cloizeaux and De Gennes to describe these correlations. We derive general scaling laws which the experimentally measured correlation functions must obey. The dependence on (scattering) wave number, concentration, and chain length is thereby reduced to a function of two variables. This function may moreover be calculated via well‐studied approximations, leaving only an excluded volume parameter and a microscopic length parameter. Using the scaling law, we derive several experimentally observed power laws for parameters such as the radius of gyration, including limiting behavior for small overlap (independent chains), large overlap, and large wave vector.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70672/2/JCPSA6-66-5-2121-1.pd

    Spin chain from membrane and the Neumann-Rosochatius integrable system

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    We find membrane configurations in AdS_4 x S^7, which correspond to the continuous limit of the SU(2) integrable spin chain, considered as a limit of the SU(3) spin chain, arising in N=4 SYM in four dimensions, dual to strings in AdS_5 x S^5. We also discuss the relationship with the Neumann-Rosochatius integrable system at the level of Lagrangians, comparing the string and membrane cases.Comment: LaTeX, 16 pages, no figures; v2: 17 pages, title changed, explanations and references added; v3: more explanations added; v4: typos fixed, to appear in Phys. Rev.
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