bluuebunny/crossref_metadata_2025_split huggingface dataset:
Observation of the J‐sheet of the Fermi surface of YbRh2Si2
Authors: Sutton A. B. , Rourke P. M. C. , Taufour V. , McCollam A. , Lapertot G. , Knebel G. , Flouquet J. , Julian S. R. 
Published: February 2010

AbstractWe report a previously unobserved quantum oscillation frequency in YbRh2Si2. This is the first quantum oscillation that can definitely be assigned to the second of the two major sheets of the Fermi surface predicted by band structure calculations. These calculations have been done for two scenarios: the “large” Fermi surface, which includes the Yb 4f‐hole in the Fermi volume, and the “small” Fermi surface, which does not. Previously observed frequencies were interpreted in terms of a “large” Fermi surface that has been so strongly spin‐split that it closely resembles the “small” Fermi surface. The new frequency can also be incorporated into this picture, however there are some indications that the situation is more complicated than was assumed, suggesting a need for more advanced band structure calculations.
Phase diagrams and switching of voltage and magnetic field in dilute magnetic semiconductor nanostructures
Authors: Escobedo R. , Carretero M. , Bonilla L. L. , Platero G. 
Published: February 2010

AbstractThe response of an n‐doped dc voltage biased II–VI multi‐quantum well dilute magnetic semiconductor nanostructure having its first well doped with magnetic (Mn) impurities is analyzed by sweeping wide ranges of both the voltage and the Zeeman level splitting induced by an external magnetic field. The level splitting versus voltage phase diagram shows regions of stable self‐sustained current oscillations immersed in a region of stable stationary states. Transitions between stationary states and self‐sustained current oscillations are systematically analyzed by both voltage and level splitting abrupt switching. Sudden voltage or/and magnetic field changes may switch on current oscillations from an initial stationary state, and reciprocally, current oscillations may disappear after sudden changes of voltage or/and magnetic field changes into the stable stationary states region. The results show how to design such a device to operate as a spin injector and a spin oscillator by tuning the Zeeman splitting (through the applied external magnetic field), the applied voltage and the sample configuration parameters (doping density, barrier and well widths, etc.) to select the desired stationary or oscillatory behavior.magnified imagePhase diagram of Zeeman level splitting Δ vs. dimensionless applied voltage ϕ for N = 10 QWs. White region: stable stationary states; black: stable self‐sustained current oscillations.(© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Spontaneous‐adjustment emission of inertia‐gravity waves by unsteady vortical motion in the hurricane core
Authors: Hendricks E. A. , Schubert W. H. , Fulton S. R. , McNoldy B. D. 
Published: February 2010

AbstractSpontaneous‐adjustment emission of inertia‐gravity waves (IGWs) from unsteady vortical motion in the hurricane core is further examined. An idealized divergent barotropic model simulation is conducted in an unforced framework using a highly asymmetric potential vorticity (PV) field, consisting of an offset monopole embedded in an elliptically shaped ring, which is motivated by concentric eyewalls that were observed in the inner core of hurricane Ivan (2004). The simulation proceeds in two phases. The first phase is marked primarily by inner‐core potential vorticity (PV) mixing and rearrangement as the monopole interacts with the ring, however axisymmetrization does not occur. This leads to a second phase characterized by a prolonged (lasting at least 36 h) period of spontaneous‐adjustment emission of IGWs to the environment. During the spontaneous‐adjustment phase, unsteady vortical motion acts as an IGW source, constraining the frequency and radial wavenumber of the waves. Diagnostics of this simulation reveal two important conclusions. First, the spontaneous radiation of IGWs is insignificant for vortex intensification or decay; rather, PV mixing in the early portion was more important. Secondly, using a non‐divergent barotropic model simulation of the same configuration and idealized simulations, we demonstrate that non‐axisymmetrization in this case‐study is caused primarily by PV (Rossby wave) dynamics, with the Rossby‐IGW instability only playing a minor role. These results support the existence of a slow quasi‐manifold with exponentially small fuzziness at small Froude and large Rossby numbers. Copyright © 2010 Royal Meteorological Society
A density functional theory study on diazotization and nitration of 3,5‐diamino‐1,2,4‐triazole
Authors: Lian Peng , Lai Wei‐Peng , Wang Bo‐Zhou , Ge Zhong‐Xue , Xue Yong‐Qiang 
Published: February 2010

AbstractThe reaction mechanism, thermodynamic and kinetic properties for diazotization and nitration of 3,5‐diamino‐1,2,4‐triazole were studied by a density functional theory. The geometries of the reactants, transition states, and intermediates were optimized at the B3LYP/6‐31G (d, p) level. Vibrational analysis was carried out to confirm the transition state structures, and the intrinsic reaction coordinate (IRC) method was used to explore the minimum energy path. The single‐point energies of all stagnation points were further calculated at the B3LYP (MP2)/6‐311+G (2d, p) level. The statistical thermodynamic method and Eyring transition state theory with Wigner correction were used to study the thermodynamic and kinetic characters of all reactions within 0–25°C. Two reaction channels are computed, including the diazotization and nitration of 3‐NH2or 5‐NH2, and there are six steps in each channel. The reaction rate in each step is increased with temperature. The last step in each channel is the slowest step. The first, second, and fifth steps are exothermic reactions, and are favored at lower temperature in the thermodynamics. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
Miniaturization of a Laser Doppler Blood Flow Sensor by System‐in‐Package Technology: Fusion of an Optical Microelectromechanical Systems Chip and Integrated Circuits
Authors: Iwasaki Wataru , Nogami Hirofumi , Higurashi Eiji , Sawada Renshi 
Published: February 2010

AbstractWe have developed the first and the smallest blood flow sensor composed of integrated circuits (ICs) fused with an optical microelectromechanical systems (MEMS) chip using system‐in‐package (SiP) technologies for application in a healthcare monitoring system. The probe of this blood flow sensor consists of three layers, and the optical MEMS chip is stacked as the top layer. Through silicon via (TSV), vertical‐cavity surface‐emitting laser (VCSEL) and cavities enable wafer‐level packaging of the optical MEMS chip. The other two layers consisting of ICs are highly densified by SiP technology, and the volume of the probe is miniaturized to about one‐sixth of our previously reported integrated laser Doppler blood flowmeter, an MEMS blood flow sensor to which SiP technology was not applied. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Shape‐prediction of 3D PTFE Microstructures Fabricated by Synchrotron Radiation Ablation
Authors: Horade Mitsuhiro , Sugiyama Susumu 
Published: February 2010

AbstractThis article describes the calculation of the predictions of the deformed shapes of three‐dimensional polytetrafluoroethylene (PTFE) microstructures fabricated by direct etching with a synchrotron radiation (SR) light source. As PTFE is a remarkable material, there is a lot of expectation regarding its applications in various devices. We did research on establishing a highly accurate three‐dimensional technology for microfabricating PTFE by using an SR‐light source because we aimed at applying this material in future devices. We built a shape‐prediction technique as part of this research. Since this technique had the advantage of predicting shapes without experimentation, both fabrication time and cost could be reduced. It is also a useful technique for investigating and clarifying processing mechanisms. We compared structures fabricated in an experiment and the shapes computed with shape‐prediction. The shape‐prediction results were mostly in agreement with those from the experiment. As PTFE demonstrated excellent material characteristics, especially in its resistance to chemicals, it should be possible to use it in the fabrication of micro total analysis systems (µ‐TAS) for biomedical applications. We expect that these applications will benefit from (based on) the designs which are predicted utilizing this calculation method. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
First‐Principles Simulation on Piezoresistive Properties in Doped Silicon Nanosheets
Authors: Nakamura Koichi , Toriyama Toshiyuki , Sugiyama Susumu 
Published: February 2010

AbstractWe have simulated the electronic states and piezoresistance coefficients in single‐crystal silicon (Si) nanosheets on the basis of first‐principles calculations of model structures. The carrier conductivities of the hydrogen‐terminated Si nanosheet models with (001) surface orientation have been calculated using band carrier densities and their corresponding effective mass tensors derived from the two‐dimensional (2D) band diagram by our original approach for a small amount of carrier occupation. The [110] uniaxial tensile stress causes band deformation, leading to the redistribution of carriers, and a drastic change of conductivity can be observed for nanosheet models. The p‐type longitudinal and transverse piezoresistance coefficients about the [110] tensile stress swell up as the nanosheet becomes thinner, and we have obtained high piezoresistance coefficients of 343 × 10−11 Pa−1 of πl[110] and − 141 × 10−11 Pa−1 of πt [110] for about 1 nm thickness. It is expected that p‐type ultra‐thin Si(001) nanosheet will be a suitable candidate for nanoscale piezoresistors due to its giant piezoresistivity. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Growth of GaN LED Structure on Si Substrate by MBE and Monolithic Fabrication of GaN LED Cooling System
Authors: Wakui Masashi , Hu Fang‐Ren , Sameshima Hidehisa , Hane Kazuhiro 
Published: February 2010

AbstractGaN‐based light emitting diodes (LEDs) were fabricated by molecular beam epitaxy (MBE) on a GaN/Si substrate prepared by metal organic chemical vapor deposition (MOCVD). Blue light emission was obtained at the peak wavelength of 410 nm. An integration of GaN LEDs and a cooling system is proposed. GaN membrane structure with Si microchannels was fabricated from the GaN/Si substrate. A preliminary experiment for the proposed device was carried out. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Influence of Slope Angle and Traction Load on Performance of AZARASHI (Seal) Mechanism with One Degree of Freedom
Authors: Furutani Katsushi , Kawagoe Katsumi 
Published: February 2010

AbstractThis paper deals with the influence of a friction force on a small mobile device, AZARASHI (Seal) mechanism with a 1‐degree of freedom (DOF) in the cases of moving on a slope and drawing a load. This device has a piezoelectric actuator, electromagnet CA that applies a constant friction force and electromagnet CB alternating the friction force by on‐off control. AZARASHI mechanism has the same structure as the inchworm‐like mover. However, AZARASHI mechanism has a smaller number of actuators to be controlled and is driven by a smaller number of steps than the inchworm‐like mover. The motion performance on the slope from 0 to 90 degrees was experimentally investigated using a 1‐DOF device. In addition, the relationship between the displacement on a vertical plane and the friction forces was tested. Under a set of sufficient friction forces, this device was possible to climb even on the vertical plane. The traction load capacity of the 1‐DOF device was also investigated. As a result, the friction forces restricted the traction load capacity. Finally, its traction load capacity was compared with the inchworm‐like mover. The lowest friction force to hold each device restricted their displacement. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Learning Relation Instances for Chinese Domain Ontology from the Web
Authors: Tian Fang , Ren Fuji 
Published: February 2010

AbstractThis paper presents a method to extract relation instances from the Internet in order to acquire knowledge that has some relations for domain ontology. We propose an ontology relation instance learning model: data sources are collected though the Web search engine and the extracted instances are constructed in Web ontology language (OWL) by Protege in Chinese. Basically, the extraction of relation instances contains syntactic patterns for filtering concepts and relevance measurement for selection of relation instances. A relevance measurement based on co‐occurrence statistics is presented in this paper, which measures the semantic similarity of the measure between candidate instances and predefined domain keywords using Web search engines. In the experiment, we extract festival customs for different festival instances using relation ‘has_custom’ between festival class and custom class in the Chinese festival ontology, and prove the effectiveness of our method. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Optimal Design of Two‐stage Logistics Network Considered Inventory by Boltzmann Random Key‐based GA
Authors: Ataka Shinichiro , Kim Byungki , Gen Mitsuo 
Published: February 2010

AbstractLogistics network design is one of the most important phases in supply chain management (SCM). Transportation planning (TP) is a well‐known basic network model that can be generally defined as a problem to minimize the total delivery cost. But for some real‐world applications, the TP model is often extended to satisfy other additional constraints or is performed in several stages. In addition, the concept of inventory is not included in a traditional TP model. Moreover, time concepts, such as carrying costs in a certain period, are not treated. Even if it is a plant that belongs to the same company, delivery methods may be different for each product. These restrictions on this model profoundly affect the use of the TP model in the real world. In this paper, we formulate a two‐stage transportation problem with inventory and exclusionary side constraints. In this model, 1 year is divided into several terms and the annual demands of delivery centers are satisfied for each term. This model includes the additional constraint in which simultaneous shipments between some plants are prohibited. To solve the problem, we propose an effective genetic algorithm (GA) method called the Boltzmann random key‐based GA (Brk‐GA). One characteristic of this method is that it features new selection processing through Boltzmann scaling and the local search techniques. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Proper Splitting of Interconnected Power Systems
Authors: Najafi S. , Hosseinian S. H. , Abedi M. 
Published: February 2010

AbstractPower system islanding is the last defense line to protect power grids from incidence of wide‐area blackout. As a wide‐area control action, power system splitting is a comprehensive decision making problem that includes different subproblems. This paper introduces a novel approach for separation of the entire power system into several stable islands in different loading levels. The proposed method combines both the dynamic and the static characteristics of interconnected power network and determines the proper splitting schemes. The presented algorithm searches for proper islanding strategy in the boundary of primary determined coherent machines using Krylov subspace method and finds the proper splitting points by transferring some of the buses in one island to another island such that total load shedding is minimized. A spanning tree‐based depth first search algorithm is used to find all possible combination of transferred buses. The presented method reduces the huge initial search space of islanding strategy considering dynamic characteristics of integrated power system and reduction of search space to only boundary network. The speed of the proposed algorithm is remarkably high and can be applied for islanding the power system in real‐time. The presented algorithm is applied to IEEE 118 BUS test system. Results show the robustness, effectiveness, and capability of the algorithm to determine fast and accurate proper islanding strategy. Time domain simulation of the islanding strategies confirms that all the islands which are specified by the proposed method are stable. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Experimental Evaluation of Strictly Proper Approximation of State Predictor for Inverted Pendulum
Authors: Abe Naoto , Ohnuki Yusuke 
Published: February 2010

AbstractThis paper presents the experimental results for an inverted pendulum with time delay. A stabilized control law is constructed with the optimal regulator and distributed delay control. Numerical approximation of the distributed delay part gives rise to an unstable closed‐loop response. The problem was solved by using the strictly proper approximation reported by Mirkin in 2004. It is shown that the inverted pendulum with time delay is stabilized by the distributed delay control laws with the strictly proper approximation experimentally. The effectiveness and practical use of the method are discussed. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Particle Swarm Optimization with Parameter Self‐Adjusting Mechanism
Authors: Yasuda Keiichiro , Yazawa Kazuyuki , Motoki Makoto 
Published: February 2010

AbstractThis paper presents a self‐adjusting strategy for tuning the parameters of particle swarm optimization (PSO) based on some numerical analysis of the behavior of PSO. The proposed adaptive tuning strategy is based on self‐tuning of the parameters of PSO, a strategy that utilizes the information about the frequency of an updated group best of a swarm. The feasibility and advantages of the proposed self‐adjusting PSO (SAPSO) algorithm are demonstrated through some numerical simulations using four benchmark problems. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
Multiple bHLH proteins regulate CIT2 expression in Saccharomyces cerevisiae
Authors: Chen Linan , Lopes John M. 
Published: February 2010

AbstractThe basic helix–loop–helix (bHLH) proteins comprise a eukaryotic transcription factor family involved in multiple biological processes. They have the ability to form multiple dimer combinations and most of them also bind a 6 bp site (E‐box) with limited specificity. These properties make them ideal for combinatorial regulation of gene expression. The Saccharomyces cerevisiae CIT2 gene, which encodes citrate synthase, was previously known to be induced by the bHLH proteins Rtg1p and Rtg3p in response to mitochondrial damage. Rtg1p–Rtg3p dimers bind two R‐boxes (modified E‐boxes) in the CIT2 promoter. The current study tested the ability of all nine S. cerevisiae bHLH proteins to regulate the CIT2 gene. The results showed that expression of CIT2–lacZ reporter was induced in a ρ0 strain by the presence of inositol via the Ino2p and Ino4p bHLH proteins, which are known regulators of phospholipid synthesis. Promoter mutations revealed that inositol induction required a distal E‐box in the CIT2 promoter. Interestingly, deleting the INO2, INO4 genes or the cognate E‐box revealed phosphate induction of CIT2 expression. This layer of expression required the two R‐boxes and the Pho4p bHLH protein, which is known to be required for phosphate‐specific regulation. Lastly, the data show that the Hms1p and Sgc1p bHLH proteins also play important roles in repression of CIT2–lacZ expression. Collectively, these results support the model that yeast bHLH proteins coordinate different biological pathways. Copyright © 2010 John Wiley & Sons, Ltd.
Functional characterization of the unconventional splicing of Yarrowia lipolytica HAC1 mRNA induced by unfolded protein response
Authors: Oh Mi Hee , Cheon Seon Ah , Kang Hyun Ah , Kim Jeong‐Yoon 
Published: February 2010

AbstractIn the yeast Saccharomyces cerevisiae, the unfolded protein response (UPR) involves the unconventional splicing of HAC1 mRNA, which is mediated by the activated Ire1p transmembrane kinase/endonuclease. In this study, we isolated and characterized a Yarrowia lipolytica HAC1 (YlHAC1) encoding a basic‐leucine zipper transcription factor. The null mutant strain of YlHAC1 (ΔYlhac1) displayed a significantly increased sensitivity to dithiothreitol (DTT) and tunicamycin (TM), along with a defect in hyphal growth, suggesting the essential function of YlHAC1 in UPR. The unconventional splicing of YlHAC1 mRNA occurred under the UPR conditions induced by DTT or TM treatment. Unlike S. cerevisiae HAC1 mRNA with an intron of 252 nt, YlHAC1 mRNA was shown to harbour a short intron of length 29 nt. The YlHAC1 mRNA harboured the nucleotides CAG, conserved at the intron borders in the filamentous fungi hac1/hacA and mammalian XBP1, as well as a conserved bipartite element within the 3′ untranslated region. The expression of the spliced form of YlHAC1 mRNA in the wild‐type andΔYlhac1 strains resulted in an increased resistance to DTT, thereby indicating that the spliced form is translated into a functional YlHac1p. Copyright © 2010 John Wiley & Sons, Ltd.
Retroperitoneal Soft Tissue Sarcomas: Experience at a Single Institution in Mexico
Authors: García‐Aceituno Luis , Villarreal‐Garza Cynthia , Perfecto Miguel , León‐Rodríguez Eucario 
Published: February 2010

AbstractBackgroundRetroperitoneal soft tissue sarcomas (RSTS) are a rare and uncommon entity with a poor 5‐year overall survival (OS) of approximately 50%, even though they rarely metastasize. The aim of the present study was to analyze the survival of patients with RSTS treated at our institution.Patients and methodsPatients with RSTS treated between 1990 and 2008 were included. Variables analyzed were age, sex, histological type, TNM stage, tumor size, grade of differentiation, and treatment (surgery, chemotherapy only, radiotherapy only, adjuvant radiotherapy, and best supportive care). R0, R1, and R2 resection were analyzed. Overall survival, recurrence‐free survival (RFS), cancer‐specific survival (CSS), and survival comparison by stage, grade, and type of resection were analyzed.ResultsData for 46 patients were analyzed, 20 men and 26 women. Median age was 51.1 years. Surgery with a curative intent was performed in 32 patients, and R0 resection was feasible in 19 (59.4%). The 5‐ and 10‐year OS rates were 47 and 30%, respectively, for the entire group. The median CSS for resected patients was 102 months; the 5‐year OS for stages I, III, and IV was 83, 37, and 0%, respectively; the 5‐year OS for low histological grade disease and high histological grade disease was 82 and 35%, respectively; and for R0, R1, and R2 resection, the 5‐year OS was 81, 56, and 14%, respectively. Median RFS was 79 months.ConclusionsIncomplete surgical resection, unresectable disease, high histological grade, and advanced TNM stage are associated with a poor survival in patients with RSTS. Complete resection is still the treatment of choice.