bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Practical Approach: Design of Wideband Cylindrical Dielectric Resonator Antenna With Permittivity Variation in Axial Direction and its Fabrication Using Microwave Laminates
Authors: Chaudhary Raghvendra Kumar , Srivastava Kumar Vaibhav , Biswas Animesh 
Published: July 2013

ABSTRACTIn this article, a practical approach for designing the cylindrical dielectric resonator antenna (CDRA) with permittivity variation in axial direction has been proposed for wideband application. The parametric analysis is performed for designing of homogeneous, two‐layer, three‐layer, and four‐layer multilayer multipermittivity (MLMP) CDRA operating at HE11δ mode. The effect of antenna parameters, such as the aspect ratio, layers' arrangement, layers' thickness, layers' permittivity, and probe length are investigated. Simulation study shows that if the layers are arranged in ascending order of their permittivities from bottom to top, the bandwidth can be improved significantly with broadside radiation patterns and low cross‐polarization levels. The detailed design guidelines are discussed for homogeneous, two‐layer, three‐layer, and four‐layer MLMP CDRA in separate sections. A prototype of three‐layer MLMP CDRA is fabricated using commercially available microwave laminates and experimentally verified for input reflection coefficient, radiation pattern, and gain profile. The good agreements between simulation and measured results have been observed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2282–2288, 2013
Design of Compact High‐Gain Dielectric Rod Antennas and Arrays in Lossy Medium
Authors: Chen Panpan , Meng Ru , Zhu Qi 
Published: July 2013

ABSTRACTIn this article, compact dielectric rod antennas with relatively high gain are presented, which are fit for use in lossy medium. A quasi‐monopole and a bifilar helix are used to simplify the feeding structure and guarantee high gain. Furthermore, antenna arrays with high gain and low side‐lobe levels are considered. Lower side‐lobe levels are achieved by lossy medium. Then, a C‐band dielectric rod antenna fed by a quasi‐monopole is designed and fabricated, and a Ku‐band antenna array, composed of four dielectric rod antennas fed by a bifilar helix is also displayed. Simulated results illustrate that the gains of the antenna are 9.53 dB and −0.29 dB in free space and in lossy medium, respectively, whereas the gain of the array is 12.2 dB with the side‐lobe level lower than 14 dB. The measured results of the antenna coincide with the simulated results. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2277–2282, 2013
A Frequency Agile, Ultralow‐Profile, Complementary Split Ring Resonator‐Based Electrically Small Antenna
Authors: Tang Ming‐Chun , Ziolkowski Richard W. 
Published: July 2013

ABSTRACTThe frequency agility of an electrically small, ultralow‐profile, VHF‐UHF antenna, which has evolved from a complementary split ring resonator unit cell design, is studied numerically. Simulation results demonstrate that when a varactor is integrated into the original 300‐MHz passive antenna and its capacitance is varied linearly from 0 to 5.8 pF, a tuning ratio of 2.02:1 and an effective fractional bandwidth of 67.6% (approximately 679.74 times the original value) is achieved while maintaining |S11| < −10dB (VSWR < 2), and a stable dipolar directivity pattern over the entire bandwidth. The overall dimensions of the proposed antenna at the maximum frequency fmax = c/λmin are 0.03(λmin)2 × 0.0066λmin. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2425–2428, 2013
A New Slot Antenna with Triple Stop‐Band Performance for UWB Applications
Authors: Akbari Mohammad 
Published: July 2013

ABSTRACTIn this article, various methods for designing a slot antenna with triple band‐notched characteristics for UWB applications are proposed. The presented antenna contains a slotted ground plane with an extra inverted U‐shaped slot at its top, coupled rectangular element with circular slot on its center, and a L‐shaped strip. The experimental results show that the designed antenna, with compact size of 20 × 22 mm2, has an impedance bandwidth from 2.65 to 13. 5GHz for VSWR≤ 2, except three frequency stop‐bands WiMAX, wireless local area network, and ITU. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2350–2354, 2013
Compact Dual‐Band‐Notched UWB Antenna with High Notch‐Band‐Edge Selectivity
Authors: Wang Junhui , Yin Yingzeng , Wang Tuo , Liu Xianglong 
Published: July 2013

ABSTRACTIn this article, a compact ultrawideband (UWB) microstrip‐fed antenna with dual‐band‐notched characteristic for the wireless local area network and the world interoperability for microwave access is presented. The proposed antenna is mainly comprised of a slotted shovel‐shaped patch, a beveled ground with a pair of square slots, a nested arc‐shaped stub, and a pair of stepped capacitively loaded loop (CLL) elements. By introducing the arc‐shaped stub on the back of the substrate, which is connected to the patch by a cylindrical via pin, the lower notched band from 3.4 to 3.7 GHz is achieved. The upper notched band with high band selectivity from 5.1 to 5.9 GHz can be obtained by adding a couple of stepped CLL elements close to the feeding line and embedding an arc‐shaped slot in the radiation patch. The proposed antenna has a total size of 26 × 27 mm2 and operates at the whole UWB with dual‐notched bands. Throughout this article, the simulated and experimental results of impedance characteristic, gain, and radiation patterns are presented and discussed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2507–2513, 2013
Design of Low‐Power and High‐Gain CMOS LNA with Current‐Reused Topology
Authors: Wang Sen , Lin Wen‐Jie 
Published: July 2013

ABSTRACTThis article presents the design of low‐power and high‐gain X‐band CMOS low‐noise amplifier (LNA) using a current‐reused (CR) topology. The proposed LNA is equivalent to a three common‐source stage cascade amplifier. With the CR technique, the amplifier is benefit to boost power gain without increasing power dissipation. The CR‐LNA is fabricated by a standard 0.18‐μm CMOS process with a chip size of 0.59 mm. The quiescent current of the circuit is merely 4.2 mA from a power supply of 1.3 V. Measured results demonstrate 20.4‐dB gain, 3.7‐dB noise figure, 11‐dB input return loss, 18‐dB output return loss, −32‐dBm input PidB, and −18.3‐dBm IIP3 at 10.7 GHz, respectively. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2429–2431, 2013
Epigenetic regulation of genomic imprinting from germ line to preimplantation
Authors: MacDonald William A. , Mann Mellissa R.W. 
Published: July 2013

SUMMARYGenomic imprinting is an epigenetic process that distinguishes parental alleles, resulting in parent‐specific expression of a gene or cluster of genes. Imprints are acquired during gametogenesis when genome‐wide epigenetic remodeling occurs. These imprints must then be maintained during preimplantation development, when another wave of genome‐wide epigenetic remodeling takes place. Thus, for imprints to persist as parent‐specific epigenetic marks, coordinated factors and processes must be involved to both recognize an imprint and protect it from genome‐wide remodeling. Parent‐specific DNA methylation has long been recognized as a primary epigenetic mark demarcating a genomic imprint. Recent work has advanced our understanding of how and when parent‐specific DNA methylation is erased and acquired in the germ line as well as maintained during preimplantation development. Epigenetic factors have also been identified that are recruited to imprinted regions to protect them from genome‐wide DNA demethylation during preimplantation development. Intriguingly, asynchrony in epigenetic reprogramming appears to be a recurrent theme with asynchronous acquisition between male and female germ lines, between different imprinted genes, and between the two parental alleles of a gene. Here, we review recent advancements and discuss how they impact our current understanding of the epigenetic regulation of genomic imprinting. Mol. Reprod. Dev. 81: 126–140, 2014. © 2013 Wiley Periodicals, Inc.
Modelling and control of a five‐degrees‐of‐freedom pneumatically actuated magnetic resonance‐compatible robot
Authors: Jiang Shan , Feng Wenhao , Lou Jinlong , Yang Zhiyong , Liu Jun , Yang Jun 
Published: July 2013

AbstractBackgroundMagnetic resonance imaging (MRI) combined with robotic assistance has the potential to improve on clinical outcomes of biopsy and local treatment of prostate cancer. This paper introduces a pneumatically actuated surgical robotic system for prostatic interventions under MRI guidance.MethodsA mechanical dynamics model was established using the Lagrange method and simulated using MATLAB software. A pneumatic actuator model was built through the use of system identification, and stability analysis was proposed based on the Nyquist criterion. In addition, a proportional‐integral‐derivative controller was implemented on the robot for accurate position control.ResultsSimulation results showed that the steady‐state error of a step response was 0.3 mm and the tracking error of a 1.0 Hz sinusoidal response was 1.5 mm. Experimental results showed that the insertion precision was 0.72 mm in the general laboratory environment.ConclusionsThe results demonstrated that the robotic system with the designed controller was effective in both position control and trajectory tracking. Copyright © 2013 John Wiley & Sons, Ltd.
Modeling of the perfect electromagnetic conducting boundary in the finite difference time domain method
Authors: Nayyeri Vahid , Soleimani Mohammad , Dehmollaian Mojtaba 
Published: July 2013

AbstractThe perfect electromagnetic conducting (PEMC) boundary, a nonreciprocal generalization of both perfect electric conducting (PEC) and perfect magnetic conducting (PMC) boundaries, is modeled in the finite difference time domain (FDTD) method. Since the PEMC boundary condition requires collocation of same components of both electric and magnetic fields at the boundary grids, which is not compatible with the original FDTD algorithm, its implementation in FDTD is challenging and requires modification in the algorithm. To do this task, first, the original FDTD cell is modified by inserting the required field components not present in the original cell. Then, a novel formulation is developed for updating fields' components at the boundary. Modeling of a PEMC planar interface, a corner point, and a wedge point are presented. Finally, numerical examples are presented to show stability, accuracy, and applicability of the proposed approach. Validation is achieved by comparisons with existing analytic methods and/or conventional FDTD for special cases of PEC and PMC boundaries.
Extending model checkers for hybrid system verification: the case study of SPIN
Authors: Gallardo María‐del‐Mar , Panizo Laura 
Published: July 2013

SUMMARYA hybrid system is a system that evolves following a continuous dynamic, which may instantaneously change when certain internal or external events occur. Because of this combination of discrete and continuous dynamics, the behaviour of a hybrid system is, in general, difficult to model and analyse. Model checking techniques have been proven to be an excellent approach to analyse critical properties of complex systems. This paper presents a new methodology to extend explicit model checkers for hybrid systems analysis. The explicit model checker is integrated, in a non‐intrusive way, with some external structures and existing abstraction libraries, which store and manipulate the abstraction of the continuous behaviour irrespective of the underlying model checker. The methodology is applied to SPIN using Parma Polyhedra Library. In addition, the authors are currently working on the extension of other model checkers. Copyright © 2013 John Wiley & Sons, Ltd.
Glycosaminoglycan metabolism defects and atherosclerosis: frequent association of endothelial dysfunction in patients with Mucopolysaccharidosis
Authors: Yano Shoji , Moseley Kathryn , Wong Lawrence , Castelnovi Claudia , Azen Colleen , Pavlova Zdena 
Published: July 2013

AbstractCardiovascular lesions, including coronary artery stenosis, are frequently associated and can cause sudden death in patients with genetic defects of glycosaminoglycan (GAG) metabolism. Early diagnosis of coronary artery lesions is difficult, although potentially lifesaving. Histopathological similarities between atherosclerotic changes in adults and in patients with genetic GAG metabolism defects have been known. Atherosclerosis is the result of a complex process involving metabolism of GAGs and proteoglycans preceded by endothelial dysfunction as a key event. Decreased nitric oxide (NO) bioavailability is considered the hallmark of endothelial dysfunction. Reduced NO synthase (NOS) has been reported in atherosclerotic arteries. Impairment in reactive hyperemia‐digital peripheral arterial tonometry (RH‐PAT) with EndoPAT has been validated to correlate coronary microvascular function in patients with atherosclerosis. RH‐PAT is thought to reflect endothelial NO production. Immunohistological staining of endothelial NOS was performed in the stenotic lesions in the coronary artery of a 3‐year‐old patient with Mucopolysaccharidosis‐I, showing decreased activities. This prompted a study to measure endothelial function in patients with GAG metabolism defects for early diagnosis of endothelial dysfunction in the coronary arteries as an early sign of coronary artery changes. Evaluation by RH‐PAT in 30 patients with variable genetic defects in GAG metabolism revealed significantly decreased Reactive Hyperemia Indexes compared with 12 controls. Evaluation of endothelial function with RH‐PAT in patients with GAG metabolism defects may detect coronary artery lesions that can be underdiagnosed by the other measures such as coronary angiography. Use of this method may prove vital in the management of patients with GAG metabolism defects.
Improved Pupil Dilation With Medication‐Soaked Pledget Sponges
Authors: Weddle Celeste , Thomas Nikki , Dienemann Jacqueline 
Published: July 2013

AbstractUse of multiple preoperative drops for pupil dilation has been shown to be inexact, to delay surgery, and to cause dissatisfaction among perioperative personnel. This article reports on an evidence‐based, quality improvement project to locate and appraise research on improved effectiveness and efficiency of mydriasis (ie, pupillary dilation), and the subsequent implementation of a pledget‐sponge procedure for pupil dilation at one ambulatory surgery center. Project leaders used an evidence‐based practice model to assess the problem, research options for improvement, define goals, and implement a pilot project to test the new dilation technique. Outcomes from the pilot project showed a reduced number of delays caused by poor pupil dilation and a decrease in procedure turnover time. The project team solicited informal feedback from preoperative nurses, which reflected increased satisfaction in preparing patients for cataract procedures. After facility administrators and surgeons accepted the procedure change, it was adopted for preoperative use for all patients undergoing cataract surgery at the ambulatory surgery center.
Perioperative Cardiopulmonary Arrest Competencies
Authors: Murdock Darlene B. 
Published: July 2013

AbstractAlthough basic life support skills are not often needed in the surgical setting, it is crucial that surgical team members understand their roles and are ready to intervene swiftly and effectively if necessary. Ongoing education and training are key elements to equip surgical team members with the skills and knowledge they need to handle untimely and unexpected life‐threatening scenarios in the perioperative setting. Regular emergency cardiopulmonary arrest skills education, including the use of checklists, and mock codes are ways to validate that team members understand their responsibilities and are competent to help if an arrest occurs in the OR. After a mock drill, a debriefing session can help team members discuss and critique their performances and improve their knowledge and mastery of skills.
Evaluating Perioperative Nursing in Finland: An Initial Validation of Perioperative Nursing Data Set Outcomes
Authors: Lamberg Eija , Salanterä Sanna , Junttila Kristiina 
Published: July 2013

AbstractThe current Finnish version of AORN's Perioperative Nursing Data Set consists of nursing diagnoses and interventions but not outcomes. During the early Finnish validation phase, researchers determined that almost half of the outcomes listed in the AORN version were impossible to measure in Finland. We conducted this study to determine the applicability of the nursing outcomes identified in the Perioperative Nursing Data Set, 2nd ed Rev, and to test the use of the outcomes by exploring the relevance of the outcome indicators for eight selected outcomes. We collected the data by using two surveys with structured questionnaires that were provided to an expert panel of nurses and physicians. Panel members found that most of the outcomes were acceptable for use in Finnish perioperative care; however, further validation of the outcome indicators is needed to develop tools to support nurses in their attempts to reach desirable nursing‐sensitive outcomes for patients.
PepBind: A Comprehensive Database and Computational Tool for Analysis of Protein–Peptide Interactions
Authors: Das Arindam Atanu , Sharma Om Prakash , Kumar Muthuvel Suresh , Krishna Ramadas , Mathur Premendu P. 
Published: July 2013

Abstract
Protein–peptide interactions, where one partner is a globular protein (domain) and the other is a flexible linear peptide, are key components of cellular processes predominantly in signaling and regulatory networks, hence are prime targets for drug design. To derive the details of the protein–peptide interaction mechanism is often a cumbersome task, though it can be made easier with the availability of specific databases and tools. The Peptide Binding Protein Database (PepBind) is a curated and searchable repository of the structures, sequences and experimental observations of 3100 protein–peptide complexes. The web interface contains a computational tool, protein inter-chain interaction (PICI), for computing several types of weak or strong interactions at the protein–peptide interaction interface and visualizing the identified interactions between residues in Jmol viewer. This initial database release focuses on providing protein–peptide interface information along with structure and sequence information for protein–peptide complexes deposited in the Protein Data Bank (PDB). Structures in PepBind are classified based on their cellular activity. More than 40% of the structures in the database are found to be involved in different regulatory pathways and nearly 20% in the immune system. These data indicate the importance of protein–peptide complexes in the regulation of cellular processes. PepBind is freely accessible at http://pepbind.bicpu.edu.in/.
A Computational Workflow to Identify Allele-Specific Expression and Epigenetic Modification in Maize
Authors: Wei Xiaoxing , Wang Xiangfeng 
Published: July 2013

Abstract
Allele-specific expression refers to the preferential expression of one of the two alleles in a diploid genome, which has been thought largely attributable to the associated cis-element variation and allele-specific epigenetic modification patterns. Allele-specific expression may contribute to the heterosis (or hybrid vigor) effect in hybrid plants that are produced from crosses of closely-related species, subspecies and/or inbred lines. In this study, using Illumina high-throughput sequencing of maize transcriptomics, chromatic H3K27me3 histone modification and DNA methylation data, we developed a new computational framework to identify allele-specifically expressed genes by simultaneously tracking allele-specific gene expression patterns and the epigenetic modification landscape in the seedling tissues of hybrid maize. This approach relies on detecting nucleotide polymorphisms and any genomic structural variation between two parental genomes in order to distinguish paternally or maternally derived sequencing reads. This computational pipeline also incorporates a modified Chi-square test to statistically identify allele-specific gene expression and epigenetic modification based on the Poisson distribution.
The impact of sourcing enterprise system use and work process interdependence on sourcing professionals’ job outcomes
Authors: Rai Arun , Hornyak Rob 
Published: July 2013

AbstractWe examine sourcing professionals’ work context to conceptualize how they use sourcing enterprise systems (SESs) and to understand when SES use results in positive/negative job outcomes. We differentiate between SES use for supplier selection and supplier governance, identify sourcing professionals’ work process interdependence as a moderator for the impacts of SES use on job satisfaction, and suggest job satisfaction mediates the impacts of SES use on job performance. We conducted a field study of sourcing professionals’ SES use at one of the largest consumer product companies in the United States, which has implemented an SES to innovate its sourcing professionals’ work processes. Based on our analysis of the survey and qualitative data we collected, we found the impacts of both types of SES use (1) to be negative on job satisfaction when work process interdependence was high, (2) to be positive on job satisfaction when work process interdependence was low, and (3) to be mediated by job satisfaction for job performance. We discuss the implications of our findings for the literature at the intersection of information systems and operations management as well as for the information technology enabled innovation of sourcing processes and, more generally, complex business processes.
The relationship between information technology capability, inventory efficiency, and shareholder wealth: A firm‐level empirical analysis
Authors: Mishra Saurabh , Modi Sachin B. , Animesh Animesh 
Published: July 2013

AbstractInventories represent an important strategic resource for firms, with implications for shareholder wealth. As such, firms expend considerable effort in managing their inventories efficiently. Among other factors, information technology (IT) capability can play an important role in enabling inventory efficiency and financial performance. However, insight into the chain‐of‐effects linking IT capability, inventory efficiency, and stock market returns and risk remains limited. In this paper, we provide a conceptual model outlining the relationships between these constructs. Next, we evaluate the model using secondary information on firms from multiple industries across the 10‐year time period of 2000–2009. Our analysis confirms that firms’ IT capability plays a significant role in enhancing their inventory efficiency, which, in turn, is observed to increase stock market returns. Our results also reveal that firms’ IT capability directly reduces their stock market risk and enhances their stock market returns. Taken together, these findings, along with the conceptual model that we advance, have important research and managerial implications.