5,835 research outputs found
Exchange-correlation energy functional and virial theorem in the extended constrained-search theory
No full textThe coupling-constant expression and virial relation for the exchange-correlation energy functional of the extended-constrained search theory [M. Higuchi and K. Higuchi, Phys. Rev. B 69, 035113 (2004)] are derived. These provide the guideline for developing and testing the approximate form of the exchange-correlation energy functional
Exchange-correlation energy functional and virial theorem in the extended constrained-search theory
No full textThe coupling-constant expression and virial relation for the exchange-correlation energy functional of the extended-constrained search theory [M. Higuchi and K. Higuchi, Phys. Rev. B 69, 035113 (2004)] are derived. These provide the guideline for developing and testing the approximate form of the exchange-correlation energy functional.ArticlePHYSICAL REVIEW B. 71(3):035116 (2005)journal articl
Merodoras Higuchi, Birindelli, Sousa & Britski, 2007, new genus
No full text[[Merodoras new genus]] During the preparation of “Peixes do Pantanal,” a book on fishes from the “Pantanal” region of western Brazil, one of us (HAB) discovered specimens of a new genus and species of Doradidae (see Britski et al., 1999). Higuchi (1992) applied the name “ Merodoras nheco ” to this discovery and a complete description of the genus and species appears in an appendix to his unpublished doctoral dissertation. The name “ Merodoras ” subsequently appeared in de Pinna (1998), but remained unavailable. The new genus and species belong to the new subfamily Astrodoradinae, a monophyletic group that was first recognized by Higuchi (1992; see also de Pinna, 1998, Moyer et al., 2002) that includes Amblydoras, Anadoras, Astrodoras, Hypodoras, Physopyxis, and Scorpiodoras. This paper formally describes this new genus and species, and nominates the new subfamily Astrodoradinae. It also includes comments on the taxonomy of the subfamily Astrodoradinae and a discussion of its phylogenetic relationships based on morphological characters of the new taxon.Published as part of Horácio Higuchi, José L. O. Birindelli, Leandro M. Sousa & Heraldo A. Britski, 2007, Merodoras nheco, new genus and species from Rio Paraguay basin, Brazil (Siluriformes, Doradidae), and nomination of the new subfamily Astrodoradinae., pp. 31-42 in Zootaxa 1446 on page 3
Modified Higuchi Model Applied to Permeation Prediction of Nanocomposite Membranes
No full textAbstractIn this work, the existing Higuchi models were used for the prediction of gas permeability through the nanocomposite membranes. Predicted values were compared with experimental results of permeability for polycarbonate/silica nanocomposite membranes. Based on the critical analysis of the models predictions and its deviations, the parameter that influences the permeation behavior has been identified. The results revealed that for any particular gas, the change of empirical Higuchi parameter exhibited a direct impact on the accuracy the model. Thus, a modified parameter was incorporated on the modified Higuchi model relating to the intrinsic properties of the penetrant gas. With the new proposed Higuchi model, appreciable predictions of gas permeability through polycarbonate/silica nanocomposite membranes were achieved. The calculated absolute average relative error for CO2, N2 and CH4 gas permeability were found to be 7.18%, 6.07%, and 6.14%, respectively. Their corresponding standard deviations were obtained as 2.53, 1.53 and 0.73 Comparing the existing Higuchi models predictions, the new proposed Higuchi model has resulted to a reduction in relative errors by 6.3% for CO2, 70.66% for N2, and 65.25% for CH4
[Transfer of Lease #1 to Minoru Higuchi], Carson Estate Company, September 18, 1946
No full textLease #1 transfer between Minoru Higuchi , J. H. Masuzumi and Carson Estate Company executed on September 18, 1946
Arbitrary choice of basic variables in density functional theory. II. Illustrative applications
No full textOur recent extended constrained-search theory [M. Higuchi and K. Higuchi, Phys. Rev. B 69, 035113 (2004)] enables us to choose arbitrary quantities as the basic variables of density functional theory. In this paper, we apply it to several cases. In the case in which the occupation matrix of localized orbitals is chosen as a basic variable, we can obtain the single-particle equation which is equivalent to that of the LDA+U method. The theory also leads to the Hartree-Fock-Kohn-Sham equation by letting the exchange energy be a basic variable. Furthermore, if the quantity associated with the density of states near the Fermi level is chosen as a basic variable, the resulting single-particle equation includes the additional potential which could mainly modify the energy-band structures near the Fermi level.ArticlePHYSICAL REVIEW B. 69(16):165118 (2004)journal articl
Arbitrary choice of basic variables in density functional theory. II. Illustrative applications
No full textOur recent extended constrained-search theory [M. Higuchi and K. Higuchi, Phys. Rev. B 69, 035113 (2004)] enables us to choose arbitrary quantities as the basic variables of density functional theory. In this paper, we apply it to several cases. In the case in which the occupation matrix of localized orbitals is chosen as a basic variable, we can obtain the single-particle equation which is equivalent to that of the LDA+U method. The theory also leads to the Hartree-Fock-Kohn-Sham equation by letting the exchange energy be a basic variable. Furthermore, if the quantity associated with the density of states near the Fermi level is chosen as a basic variable, the resulting single-particle equation includes the additional potential which could mainly modify the energy-band structures near the Fermi level
Higuchi Bound on Slow Roll Inflation and the Swampland
No full textIn this paper we study the implications of the generalized Higuchi bound on massive spin-two fields for the derivative of the scalar potential within bimetric theory. In contrast to the recent de Sitter swampland conjecture, an upper bound on the derivate of the scalar potential follows from the generalized Higuchi bound. In combination, this leaves a window for the derivate of the scalar potential. We discuss this bound in several representative bimetric models and parameter regions
In darkness and seclusion : rhetoric of madness and problems of modernity in the works of Higuchi Ichiyō (1872-1896)
No full textThe author attempts to analyse how madness is aestheticized and poeticized in the late novellas by Higuchi Ichiyō (1872-1896). While referring to the concept of illness as a metaphor as developed by Susan Sontag and applied to the Japanese context by Karatani Kōjin, the author elaborates on the evocative and symbolic images of madness in Ichiyō’s works. The possible correspondences between the analyzed metaphors and the discourse of modernity in Meiji Japan are also considered Higuchi
Absence of the Higuchi bound in a family of alternative linear massive spin-2 models
No full textThere is a well known result from the Fierz-Pauli (FP) theory in de Sitter
background that is the existence of a lower bound for the mass of the spin
2 particle, the Higuchi bound. It establishes that , where is
the Hubble parameter, in order to the theory presents no ghost-like
instabilities. In this sense, should be unacceptable high in order to
fulfill this condition at the time of the inflationary epoch of the Universe,
posing a difficulty to conciliate the FP theory with cosmology. In this letter
we show that the Higuchi bound can be circumvented in an alternative
description of massive spin-2 particles known as models. In
maximally symmetric spaces the theory has two free parameters which can be
consistently chosen in order to make the model absent of a lower bound for .
Then, can be arbitrarily smaller than the energy scale of inflation
avoiding instabilities at that time
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