bluuebunny/crossref_metadata_2025_split huggingface dataset:
S‐ and C‐band modified PIFAs in MIMO arrangement on cylindrical ground plane
Authors: Hall Tavis , Sharma Satish K. 
Published: June 2016

ABSTRACTAn omni‐directional antenna in multiple input multiple output (MIMO) arrangement is presented that covers S‐band (2.3–2.5 GHz) and C‐band (4.4–5.1 GHz) wireless communication applications. One pair of modified PIFA‐like radiating structures is used for each of the two bands. These elements are placed on a cylindrical ground plane with bents which is cut from a cylindrical conducting surface to accommodate a device which has a unique shape. Simulated and measured MIMO parameters such as the total active reflection coefficient (TARC), envelope correlation coefficient (ECC), mean effective gain (MEG), and channel capacity loss (Closs) are computed and presented. Performance results are very satisfactory for a MIMO antenna. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2137–2143, 2016
Small end‐fire superdirective folded meandered monopole antenna array
Authors: Hammoud Mohamad , Haskou Abdullah , Sharaiha Ala , Collardey Sylvain 
Published: June 2016

ABSTRACTIn this letter, we present a compact four‐element superdirective antenna array operating at 900MHz frequency band. In this antenna, only one element is excited while the others are parasitic‐loaded elements. The antenna total dimensions are 231 × 122 mm2 and it has a total directivity of 11.6dBi and radiation efficiency of 46%. This antenna is significantly compact compared with others presenting the same directivity. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2122–2124, 2016
A high‐efficiency gan power amplifier with harmonic control based on Si‐IPDS
Authors: Jin An Sung , Min Yook Jong , Woong Yoon Tae , Kim Hyeok , Chul Kim Jun , Yook Jong‐Gwan , Park Youngcheol , Kim Dongsu 
Published: June 2016

ABSTRACTThis article presents a high‐efficiency power amplifier using quasi‐MMIC technology. The efficiency enhancement is achieved based upon the second or third harmonic control provided by input and output matching networks. The gate‐source voltage waveform control with Class‐F operation achieves significant efficiency improvements. The quasi‐MMIC technology using silicon‐integrated passive devices (Si‐IPDs) can drive the solution to provide compact size at 2.4 GHz. The output matching network for Class‐F operation is described, using lumped elements to reduce circuit size. The dimensions of the fabricated power amplifier are 3.6 mm × 7.6 mm, with a thickness of 0.15 mm. The measured results show that the power amplifier has a small signal gain of about 10 dB and a Psat of 41.8 dBm with a maximum drain efficiency of 70.8% at 2.4 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2178–2182, 2016
Ultrathin plasmonic frequency selective surface with subwavelength hole arrays
Authors: Zhang Lirong , Wu Shanshan , Xu Kaida , Yan Shuang , Zhu Jinfeng , Lin Timothy , Huo Liu Qing 
Published: June 2016

ABSTRACTManipulation of optical transmission using plasmonic nanostructures is a significant issue in applications related to ultra‐compact optoelectronic devices. In this paper, we present a type of plasmonic frequency selective surface constructed with an ultrathin gold film (∼20 nm) with arrays of subwavelength holes. By means of modified nanosphere lithography, we fabricate the nanostructured gold films with scalable sizes and tunable transmission in the visible and near‐infrared range. Moreover, electromagnetic simulations are performed and demonstrate good agreement with experimental results and further reveal the evolution of optical properties from the optically thick film to the ultrathin film. The research achievements will provide significant design guidance of ultrathin plasmonic frequency selective surface for future nanophotonic devices. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2171–2176, 2016
On the design of CMOS phase shifters with small insertion‐loss variation for phased arrays and its validation at 24 GHz
Authors: Bae Juseok , Nguyen Cam 
Published: June 2016

ABSTRACTBody‐floating technique applied to n‐type metal‐oxide‐semiconductor transistors and transistor‐size optimization is studied for minimizing the insertion‐loss variation in phase shifters. A CMOS radio frequency integrated circuit 4‐bit digital phase shifter with low insertion‐loss variation across different phase states is designed at 24 GHz using a 0.18‐μm SiGe BiCMOS technology to verify the concepts. The phase shifter shows a measured insertion‐loss variation of 13 ± 2.5 dB, root mean square (RMS) amplitude error of 1.7 dB, and input 1‐dB power compression (P1dB) higher than 12.5 dBm across different phase states at 24 GHz. The measured input/output return loss better than 10 dB and RMS phase error of 2.4–26° over 21 to 27 GHz are obtained. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2203–2210, 2016
A small wilkinson power divider with complex isolation component
Authors: Wang Xiaolong , Ma Zhewang , Sakagami Iwata , Mase Atsushi , Yoshikawa Masayuki 
Published: June 2016

ABSTRACTBy using complex isolation component, the proposed Wilkinson power divider occupy smaller area than that of conventional Wilkinson power divider. General design equations for complex isolation component are derived from even‐ and odd‐mode analysis. Various RLC circuits are chosen to realize complex isolation components, respectively. Considering the bandwidths of S22, S33 and S32, inductors in RLC circuits are omitted to get the widest bandwidths and easy fabrication. Compared with Trantanella's work, the proposed power divider provides wider bandwidths of S22, S33 and S32, and smaller capacitances under the same conditions, furthermore, the resistor in parallel RC circuit is constant value and suitable for industry applications. In experiment, one circuit was fabricated with parallel RC isolation component, experimental results showed good agreement with theoretical results. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2163–2168, 2016
A 3–5 GHz UWB impulse generator in 0.13 μm CMOS
Authors: Feng Weiwei , Li Nan , Li Xiuping 
Published: June 2016

ABSTRACTThis article proposes a 3–5 GHz IR‐UWB (impulse radio ultra‐wide band) impulse generator. The impulse generator is mainly composed of an ultra‐narrow pulse generator and an on‐chip filter. The IR‐UWB impulse generator is implemented in 0.13 μm CMOS, while the chip size is 0.29 mm2. The peak‐to‐peak voltage of the output signals is 600 mV. When the data rate is 10 MHz, the circuit consumes 6.95 mW. The impulse generated can fulfill the FCC spectral mask for indoor UWB systems. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2242–2245, 2016
A compact shorted patch rectenna design with harmonic rejection properties for the applications of wireless power transmission
Authors: Chou Jui‐Hung , Lin Ding‐Bing , Hsiao Tsai‐Wen , Chou Hsi‐Tseng 
Published: June 2016

ABSTRACTThis article presents a compact design of shorted patch rectenna with the harmonic rejection properties for the applications of wireless power transmission. To improve the power conversion efficiency (PCE), the harmonic rejection filter widely used in the conventional design is removed from the circuit to reduce the insertion loss. Instead, the rejection of higher order harmonic noise that was generated from the rectifying diodes is achieved by etching a U‐shape slot resonator on the shorted patch antenna. As a result, this method may improve the PCE without sacrificing the capability of higher order harmonic noise rejection. The design procedure and performance of the proposed shorted patch rectenna will be presented in detail in this article. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2250–2257, 2016
RF transceiver‐based wireless pressure monitoring system
Authors: Kumar Amarjit , Pathak Nagendra P. 
Published: June 2016

ABSTRACTThis article reports the development and characterization of a robust RF transceiver system for wireless monitoring of the pressure variation in a gas pipeline installed in an industry. Proposed system consists of a monolithic silicon pressure sensor for converting applied pressure information to a DC voltage output, a varactor‐based voltage controlled oscillator (VCO) for converting DC voltages to RF signal, a power amplifier for amplifying the transmitting RF signal, and two wideband microstip fed filtering antennas used in transmitter and receiver modules. Transmitting antenna is used for radiating the selected RF signal (conditioned pressure information) while reflecting the undesired harmonics. Filtering antenna (Filtenna) at the receiver side is used to detect the desired RF signal while filtering out the undesired signal. Operating frequency band of proposed wireless pressure monitoring system is 2.2565–2.5804 GHz covering lower ISM band (2.4–2.5 GHz). As a proof of concept, experiment has been performed for monitoring of a pressure variation in the range 0–50 kPa and for a distance of 2 m between transmitting and receiving antennas. The measured pressure sensitivity of the proposed gas pressure monitoring system is 6.4786 MHz/kPa with a good linearity response. Calibration curve and curve fitting equations are provided for evaluating the pressure variation in a gas pipeline by detecting the received RF signal at the receiver end. Proposed system can be used for wirelessly monitoring the pressure of a gas pipeline installed in an industry. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2237–2242, 2016
Diagnostic accuracy of concentric needle jitter in myasthenia: Prospective study
Authors: C.N. Machado Flavia , A. Kouyoumdjian JOÃO , E. Marchiori Paulo 
Published: June 2016

ABSTRACTIntroduction: The aim of this study was to estimate jitter parameters in the orbicularis oculi muscle using a concentric needle electrode (CNE) in patients with myasthenia gravis (MG) and to determine its diagnostic accuracy for jitter analysis (CNEMG‐jitter). Methods: CNEMG‐jitter was performed in 20 healthy subjects and 33 MG patients using the voluntary contraction technique. Receiver operating characteristic (ROC) curves were constructed to determine cut‐off points with the best sensitivity/specificity combination for jitter analysis. Results: CNEMG‐jitter yielded high positivity rates for ocular MG (92.3%) and generalized MG (100%). The ROC curve cut‐off point that provided the highest sensitivity without false positives was 24.7 μs for mean jitter and 33.1 μs for the 18th highest value. Sensitivity was 93.9% for both parameters. Diagnostic accuracy of CNEMG‐jitter was > 96%. Conclusions: CNEMG‐jitter yielded high sensitivity and specificity rates. Our reference values were lower than previously published values, possibly due to less technical variation between the different recordings. Muscle Nerve 55: 190–194, 2017
On structural shape optimization using an embedding domain discretization technique
Authors: Riehl Stefan , Steinmann Paul 
Published: June 2016

SummaryThis contribution presents a novel approach to structural shape optimization that relies on an embedding domain discretization technique. The evolving shape design is embedded within a uniform finite element background mesh which is then used for the solution of the physical state problem throughout the course of the optimization. We consider a boundary tracking procedure based on adaptive mesh refinement to separate between interior elements, exterior elements, and elements intersected by the physical domain boundary. A selective domain integration procedure is employed to account for the geometric mismatch between the uniform embedding domain discretization and the evolving structural component. Thereby, we avoid the need to provide a finite element mesh that conforms to the structural component for every design iteration, as it is the case for a standard Lagrangian approach to structural shape optimization. Still, we adopt an explicit shape parametrization that allows for a direct manipulation of boundary vertices for the design evolution process. In order to avoid irregular and impracticable design updates, we consider a geometric regularization technique to render feasible descent directions for the course of the optimization. Copyright © 2016 John Wiley & Sons, Ltd.
Obesity and associated adverse health outcomes among US military members and veterans: Findings from the millennium cohort study
Authors: Rush Toni , LeardMann Cynthia A. , Crum‐Cianflone Nancy F. 
Published: June 2016

ObjectiveTo assess the prevalence of obesity and associated health outcomes among US service members and veterans.MethodsData from three survey cycles (2001–2008) of the Millennium Cohort Study were used to examine the prevalence of obesity and associated health outcomes.ResultsOf the 42,200 individuals, 25% were of normal weight in 2007/2008. Rates of obesity were significantly higher among veterans (32%) compared with service members (20%). Over a 7‐year period, obesity rates doubled among both service members (10%–20%) and veterans (14%–32%). Participants with obesity were significantly more likely to be male, older, less educated, in the Army or Navy, and separated/retired from the military. Hypertension, diabetes, and sleep apnea were significantly more common among individuals with obesity compared with participants with normal weight (all P < 0.05). Individuals with obesity also had significantly higher rates of depression and post‐traumatic stress disorder than individuals with normal weight and had lower mental and physical functional scores (all P < 0.05).ConclusionsThese findings indicate an urgent need to enhance strategies for preventing and reducing excess weight gain within the military and veteran populations. Such strategies should aim to ensure a fit military force and promote health after military service.
Cutaneous malignant melanoma in children and adolescents treated in pediatric oncology units
Authors: Réguerre Yves , Vittaz Marie , Orbach Daniel , Robert Caroline , Bodemer Christine , Mateus Christina , Plantaz Dominique , Plouvier Emmanuel , Lutz Patrick , Rakotonjanahary Josue , Fraitag Sylvie , Martin Ludovic 
Published: June 2016

AbstractObjectivesRecent progress in the understanding of tumor biology and new targeted therapies has led to improved survival in adults with malignant melanoma (MM). MM is rare in children, especially before puberty. We report here our experience with pediatric patients with MM, describe the clinical presentation, treatment and evolution, and compare prepubescent and postpubescent disease.MethodsA retrospective, descriptive, national multicenter study was undertaken of 52 cases of MM in children and adolescents. Demographic, histopathology, treatment evolution data, and survival distributions are described.ResultsMedian age was 15 years (5–18). The tumors were often amelanotic (45%) and raised (83%), and Breslow thickness was greater than 4 mm in 35% of cases. Histological examination showed superficial spreading (n = 16) or spitzoid (n = 16) or nodular (n = 9) pattern. Twelve children (23%) were less than 10 years of age. The spitzoid histotype was more frequent in prepubescent children (seven of 12). Seventeen patients relapsed, of whom four had skin lesions initially diagnosed as benign. Ten patients died after relapse. Five‐year event‐free survival and overall survival were 62.7% (95% confidence interval [CI]: 45.3–76) and 75.5% (95% CI: 56.8–87.1), respectively.ConclusionsMM appears to be different in prepubescent children, of whom most had a spitzoid histotype. Diagnosis can be difficult, leading to delay in treatment. New biological tools to identify targets for treatment in MM and to differentiate spitzoid melanomas from Spitz nevi now exist. As effective targeted therapies are now available, we recommend requesting biological examination of all melanocyte‐derived skin lesions in children that could be malignant.
The association between cinacalcet use and missed in‐center hemodialysis treatment rate
Authors: Brunelli Steven M. , Sibbel Scott , Dluzniewski Paul J. , Cooper Kerry , Bensink Mark E. , Bradbury Brian D. 
Published: June 2016

AbstractPurposeMissed in‐center hemodialysis treatments (MHT) are a general indicator of health status in hemodialysis patients. This analysis was conducted to estimate the association between cinacalcet use and MHT rate.MethodsWe studied patients receiving hemodialysis and prescription benefits services from a large dialysis organization. Incident cinacalcet users were propensity score matched to controls on 31 demographic, clinical, and laboratory variables. We applied inverse probability (IP) of censoring and crossover weights to account for informative censoring. Weighted negative binomial modeling was used to estimate MHT rates and pooled logistics models were used to estimate the association between cinacalcet use and MHT.ResultsBaseline demographic and clinical variables included serum calcium, phosphorus, parathyroid hormone, and vitamin D use, and were balanced between 15,474 new cinacalcet users and 15,474 matched controls. In an analysis based on intention‐to‐treat principles, 40.8% of cinacalcet users and 46.5% of nonusers were censored. MHT rate was 13% lower among cinacalcet initiators versus controls: IP of censoring weighted incidence rate ratio was 0.87 (95% confidence interval [CI]: 0.84–0.90 p < 0.001). In analyses based on as‐treated principles, 72.8% and 61.5% of cinacalcet users and nonusers, respectively, crossed over or were censored. MHT rate was 15% lower among cinacalcet initiators versus controls: IP of censoring/crossover weighted incidence rate ratio was 0.85 (95%CI: 0.82–0.87 p < 0.001).ConclusionsAfter controlling for indication and differential censoring, cinacalcet treatment was associated with lower MHT rates, which may reflect better health status. Copyright © 2016 John Wiley & Sons, Ltd.
Insecticide ADME for support of early‐phase discovery: combining classical and modern techniques
Authors: David Michael D 
Published: June 2016

AbstractThe two factors that determine an insecticide's potency are its binding to a target site (intrinsic activity) and the ability of its active form to reach the target site (bioavailability). Bioavailability is dictated by the compound's stability and transport kinetics, which are determined by both physical and biochemical characteristics. At BASF Global Insecticide Research, we characterize bioavailability in early research with an ADME (Absorption, Distribution, Metabolism and Excretion) approach, combining classical and modern techniques. For biochemical assessment of metabolism, we purify native insect enzymes using classical techniques, and recombinantly express individual insect enzymes that are known to be relevant in insecticide metabolism and resistance. For analytical characterization of an experimental insecticide and its metabolites, we conduct classical radiotracer translocation studies when a radiolabel is available. In discovery, where typically no radiolabel has been synthesized, we utilize modern high‐resolution mass spectrometry to probe complex systems for the test compounds and its metabolites. By using these combined approaches, we can rapidly compare the ADME properties of sets of new experimental insecticides and aid in the design of structures with an improved potential to advance in the research pipeline. © 2016 Society of Chemical Industry
Aggregation induced emission (AIE) active carbazole styryl fluorescent molecular rotor as viscosity sensor
Authors: Kumbhar Haribhau S. , Deshpande Saurabh S. , Shankarling Ganapati S. 
Published: June 2016

AbstractThe carbazole styryl based fluorescent molecular rotors (FMRs) with different chemical functionalities at C=C bond were synthesized and characterized spectroscopically. These compounds exhibits bright solid state fluorescent and also exhibits aggregation induced emission (AIE) and fluorescent response towards viscosity. Apart from traditional p‐(dialkylamino)‐benzylidene malonitriles motifs, we have used carbazole styryl dyes as viscosity sensors. In this study we have discussed about the effect of chemical functionalities/ substituents on the fluorescent properties, aggregation induced emission (AIE) and viscosity sensitivity. These compounds can find potential applications in biomedical field as fluorescent molecular rotors for viscosity determination.
LiOtBu Promoted 5‐Exo–dig Cyclization of Propargyl Alcohols and Isocyanates for the Synthesis of Multisubstituted 3H‐Oxazol‐2‐ones and Oxazolidin‐2‐ones
Authors: Savarimuthu S. Antony , Thomas S. Augustine , Prakash D. G. Leo , Gandhi Thirumanavelan 
Published: June 2016

AbstractThis study presents an efficient procedure for synthesis of 3,4,5‐trisubstituted 3H‐oxazol‐2‐ones and 3,4‐disubstituted (Z)‐oxazolidin‐2‐ones from substituted propargyl alcohols and aryl/alkyl isocyanates in the presence of LiOtBu, a base, and DMF, a solvent. This one‐step, low‐cost and gram scale synthesis exhibits superior atom economy, good to excellent yields, enhanced substrate scope and, high functional group tolerance and uses column chromatography‐free purifications. Further, a product containing bromo substituent was successfully examined for Suzuki coupling with a view to amplifying the complexity of the molecule. Finally, the three component (aniline, Di‐tert‐butyldicarbonate and propargyl alcohol) reaction was demonstrated to get the oxazolon‐2‐ones (3H‐oxazol‐2‐one and oxazolidin‐2‐one).
Reductive Amination of Aldehyde Ester from Vegetable Oils to Produce Amino Ester in the Presence of Anhydrous Ammonia
Authors: Louis Kévin , Beauchene Emmanuel , Vivier Laurence , Dubois Jean‐luc , Vigier Karine De Oliveira , Pouilloux Pr. Yannick 
Published: June 2016

AbstractReductive amination has been reported in the literature in the presence of amine or liquid ammonia and Ni catalysts for instance. However, to the best of our knowledge it is the first time that anhydrous ammonia was used to produce methyl‐9‐aminononanoate from methyl‐9‐oxononanoate in the presence of hydrogen, methanol and Pd/C catalyst. A yield of 74 % of the primary amino ester (methyl‐9‐aminononanoate) was obtained at 50 °C after 2 h of reaction under 100 bar of hydrogen in the presence of anhydrous ammonia. It was shown that in order to avoid the poisoning of the catalyst, anhydrous ammonia and hydrogen should be added at the beginning of the reaction to maintain the catalytic properties of Pd/C. Moreover, the catalyst was recyclable and the leaching of Pd was rather low under these conditions. These reaction conditions allow the formation of a renewable synthon which can be used in polymer industry.
ContainerCloudSim: An environment for modeling and simulation of containers in cloud data centers
Authors: Piraghaj Sareh Fotuhi , Dastjerdi Amir Vahid , Calheiros Rodrigo N. , Buyya Rajkumar 
Published: June 2016

SummaryContainers are increasingly gaining popularity and becoming one of the major deployment models in cloud environments. To evaluate the performance of scheduling and allocation policies in containerized cloud data centers, there is a need for evaluation environments that support scalable and repeatable experiments. Simulation techniques provide repeatable and controllable environments, and hence, they serve as a powerful tool for such purpose. This paper introduces ContainerCloudSim, which provides support for modeling and simulation of containerized cloud computing environments. We developed a simulation architecture for containerized clouds and implemented it as an extension of CloudSim. We described a number of use cases to demonstrate how one can plug in and compare their container scheduling and provisioning policies in terms of energy efficiency and SLA compliance. Our system is highly scalable as it supports simulation of large number of containers, given that there are more containers than virtual machines in a data center. Copyright © 2016 John Wiley & Sons, Ltd.