142,004 research outputs found
A new approach to the discrete logarithm problem with auxiliary inputs
No full textThe aim of the discrete logarithm problem with auxiliary inputs is to solve for alpha, given the elements g, g(alpha), . . . , g(alpha d) of a cyclic group G = < g >, of prime order p. The best-known algorithm, proposed by Cheon in 2006, solves for a in the case where d vertical bar (p +/- 1), with a running time of O(root p/d+d(i)) group exponentiations (i = 1 or 1/2 depending on the sign). There have been several attempts to generalize this algorithm to the case of Phi(k)(p) where k >= 3. However, it has been shown by Kim, Cheon and Lee that a better complexity cannot be achieved than that of the usual square root algorithms. We propose a new algorithm for solving the DLPwAI. We show that this algorithm has a running time of (O) over tilde(root p/tau(f) + d) group exponentiations, where tau(f) is the number of absolutely irreducible factors of f (x) - f (y). We note that this number is always smaller than (O) over tilde (p(1/2)). In addition, we present an analysis of a non-uniform birthday problem.Y
DS_10.1177_0001839218769634 – Supplemental material for Multinational Firms, Labor Market Discrimination, and the Capture of Outsider’s Advantage by Exploiting the Social Divide
No full textSupplemental material, DS_10.1177_0001839218769634 for Multinational Firms, Labor Market Discrimination, and the Capture of Outsider’s Advantage by Exploiting the Social Divide by Jordan Siegel, Lynn Pyun and B. Y. Cheon in Administrative Science Quarterly</p
Mujeres carnívoras y subversión de género en la literatura de Cheon Unyeong
No full textEste trabajo analiza los arquetipos femeninos presentados en la obra literaria de Cheon Unyeong (1971) con especial atención a su antología Baneul (Aguja, 2001) y a la representación de mujeres carnívoras que propone la autora y que cuestiona los roles tradicionales de género a través de una exploración de lo violento y lo grotesco en la que dota a sus personajes femeninos de características históricamente asociadas a la masculinidad. Asimismo, se reflexiona sobre el significado de esos personajes dentro de la literatura coreana contemporánea y la manera en que contrastan con los presentados por otras autoras
Diseño e implementación de prototipo de red inalámbrica de sensores energizado con paneles solares, para el monitoreo y la automatización de riego en la agricultura
No full textEsta tesis titulada “Diseño e implementación de prototipo de red inalámbrica de sensores energizado con paneles solares, para el monitoreo y la automatización de riego en la agricultura” se llevó a cabo en el departamento de Lima, Perú, surge de la problemática de la falta de uso de técnicas de monitoreo y control del riego en la agricultura, manifestándose en la no obtención de un fruto de calidad uniformizado, desperdicio del agua y en la reducción de vida del suelo agrícola. Para el desarrollo de este trabajo se analizó las variables básicas que son necesarias monitorear para la decisión de riego, luego se diseñaron e implementaron los nodos de campo energizado con paneles solares, previamente dimensionados para la zona de pruebas, como también el nodo coordinador encargado de recolectar la información y enviarla a una interfaz de monitoreo configurada en LabVIEW. Para comprobar el funcionamiento del sistema, se realizaron pruebas en laboratorio y campo en un área de terreno de 100m2; concluyendo que el sistema se encuentra operativo, además que es un sistema escalable y adaptable a cualquier tipo de cultivoSubmitted by Veronica RubinDeCelis ([email protected]) on 2023-03-20T04:01:47Z
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Miniature transparent UWB antenna with tunable notch for green wireless applications
No full textCopyright @ 2011 IEEEA miniature transparent UWB antenna with tunable notch that can be incorporated with a solar panel for harnessing solar energy has been proposed and presented. The antenna demonstrates a good omni-directional
radiation pattern throughout the FCC bandwidth of 3.1 – 10.6 GHz and a comparable gain making it a good candidate for future green wireless applications
Descriptions of three new species of Ypsolopha Latreille (Lepidoptera: Ypsolophidae) from East Asia, redescription of Y. contractella (Caradja) and a checklist of East Asian Ypsolopha
No full textSohn, Jae-Cheon, Ponomarenko, Margarita G., Wu, Chun-Sheng, Han, Hui-Lin, Wang, Xin-Li (2010): Descriptions of three new species of Ypsolopha Latreille (Lepidoptera: Ypsolophidae) from East Asia, redescription of Y. contractella (Caradja) and a checklist of East Asian Ypsolopha. Zootaxa 2511: 22-38, DOI: 10.5281/zenodo.29440
Searching for neutrinoless double beta decay with the AMoRE experiments
No full textSearches for the neutrinoless double beta decay (0νDBD) have been pursued for decades by many researchers since it is a viable channel to probe the lepton number violating process and unveil some unknown properties of neutrino. The AMoRE experiments have been searching for 0νDBD of 100Mo isotope using molybdate crystal scintillators. The experiments used the molybdate crystals as the absorber for the cryogenic calorimeter, which measures the energetic phonons and scintillation lights from the particle interaction in the crystal absorber. The experiments have been scheduled as several phases of AMoRE-pilot, AMoRE-I and AMoRE-II with the significant increase in the absorber mass and reduction of the background level for each upgrade. Currently, we are running AMoRE-I experiment, which uses 6.2 kg of molybdate crystal absorbers, and preparing for AMoRE-II experiment, which will exploit 100 kg of 100Mo isotopes, ultimately. The overall status of the AMoRE experiments is presented in the paper
Manipulation of the active site loops of D-hydantoinase, a (beta/alpha)(8)-barrel protein, for modulation of the substrate specificity
No full textWe previously proposed that the stereochemistry gate loops (SGLs) constituting the substrate binding pocket Of D-hydantoinase, a (beta/alpha)(8)-barrel enzyme, might be major structural determinants of the substrate specificity [Cheon, Y. H., et al. (2002) Biochemistry 41, 9410-9417]. To construct a mutant D-hydantoinase with favorable substrate specificity for the synthesis of commercially important nonnatural amino acids, the SGL loops of the enzyme were rationally manipulated on the basis of the structural analysis and sequence alignment of three hydantoinases with distinct substrate specificities. In the SGLs Of D-hydantoinase from Bacillus stearothermophilus SDI, mutations of hydrophobic and bulky residues Met 63, Leu 65, Phe 152, and Phe 159, which interact with the exocyclic substituent of the substrate, induced remarkable changes in the substrate specificities. In particular, the substrate specificity of mutant F159A toward aromatic substrate hydroxyphenylhydantoin (HPH) was enhanced by similar to200-fold compared with that of the wild-type enzyme. Saturation mutagenesis at position 159 revealed that k(cat) for aromatic substrates increased gradually as the size of the amino acid side chain decreased, and this seems to be due to reduced steric hindrance between the bulky exocyclic group of the substrate and the amino acid side chains. When site-directed random mutagenesis of residues 63 and 65 was conducted with the wild type and mutant F159A, the selected enzymes (M63F/L65V and L65F/FI59A) exhibited similar to10-fold higher k(cat) values for HPH than the wild-type counterpart, which is likely to result from reorganization of the active site for efficient turnover. These results indicate that the amino acid residues of SGLs forming the substrate binding pocket are critical for the substrate specificity Of D-hydantoinase, and the results also imply that substrate specificities of cyclic amidohydrolase family enzymes can be modulated by rational design of these SGLs
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