bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compact band‐notched ultra‐wideband printed antenna using inverted L‐slit
Authors: Yoon Cheol , Lee Won‐Jong , Kim Woo‐Su , Lee Hwa‐Choon , Park Hyo‐Dal 
Published: November 2011

AbstractA compact and simple design of a printed antenna for ultra‐wideband (UWB) application with band‐notch characteristics are presented.The antenna size is 30 × 36 × 0.4 mm3 and operates over an extremely wide band of 2.82–13.95 GHz. The desired band‐notched UWB operation can be obtained by choosing the size of the inverted L‐slit. The proposed design consists of an inverted L‐slit as the radiator and a coplanar ground plane. The proposed antenna has advantages of low cost, compact size, thin substrate, and easy design. The measured impedance bandwidth defined by VSWR ≤ 2 of 11.13 GHz (2.82–13.95 GHz), with the band‐notched of 4.85–6.04 GHz, is obtained. Moreover, omnidirectional radiation patterns with appreciable gain across the operating band can be obtained. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:143–144, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26479
Compact dielectric‐resonator‐on‐patch antenna with bandwidth enhancement
Authors: Gao Yang , Feng Zhenghe , Zhang Li 
Published: November 2011

AbstractA method to further broaden the bandwidth of compact dielectric‐resonator‐on‐patch antennas, using an E‐shaped patch is presented. Without enlarging the volume or area of the antenna, the experimental antenna demonstrates a 10 dB return loss bandwidth of 4.38–7.96 GHz (58%), wider than the formally obtained 4.7–7 GHz (39.3%). The wideband mechanism is explored by investigating the behavior of the currents on the patch and the electric field distributed in the near field. To show the validity of the design concept, a prototype is fabricated and tested. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:66–71, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26481
A T‐junction power divider FED circularly polarized cavity backed slot antenna
Authors: Luo Guo Qing , Hu Zhi Fang , Zhang Xiao Hong , Dong Lin Xi , Sun Ling Ling 
Published: November 2011

AbstractA circularly polarized antenna realized by a power divider fed cavity backed slot antenna is presented in this article.The cavity backed slot antenna is constructed on a single layer substrate by using substrate integrated waveguide (SIW) technique. A T‐junction power divider with equal magnitude and 90° phase difference outputs is adopted as the parallel feed to excite the SIW backed cavity. Circularly polarized radiation can be generated when two orthogonal cavity modes are excited simultaneously in the backed cavity. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:107–109, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26482
Composite right/left‐handed coplanar waveguide feeding array of slot antennas
Authors: Safwat Amr M. E. , Alwakil Ahmed D. 
Published: November 2011

AbstractIn this article, a new composite right/left‐handed (CRLH) antenna is proposed. The antenna is implemented by cascading dual‐function coplanar waveguide coupled line CRLH unit cells. The proposed antenna has continuous backward to forward radiation. The scanning angle, radiated power and directivity increase as the number of cells increases. For nine cells, the scanning angle is 77°, the radiated power is 75%, the peak directivity is 4.2, and the total length is smaller than λ0. The circuit and EM simulations have been confirmed by measurements. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:103–107, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26483
Study of the performance of dielectric resonator antennas based on the matrix BiREWO6 [RE = Gd, Y, Nd]
Authors: Rocha G. N. , Melo L. F. L. , da Silva M. A. S. , Silva P. V. S. , Sombra A. S. B. , Fechine P. B. A. 
Published: November 2011

AbstractIn this work, we study for the first time the dielectric properties, at microwave frequencies, of the BiREWO6 (RE = Y, Gd, and Nd) dielectric resonator (DR) obtained by microwave assisted fast solid state synthesis. The DRs were excited by a wire antenna protruding above a ground plane and simulations were carried out using high‐frequency structure simulator. The DRs presented permittivity values between 13 and 19 and dielectric loss of around 10−2. The agreement between experimental and simulated values for the resonant frequency and the bandwidth for all dielectric resonator antennas was considered good. The small size of the antenna and its compactness makes it especially attractive for use as an electric monopole in practical applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:18–23, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26486
Ultra‐wideband three‐way power divider using broadside‐coupled microstrip‐coplanar waveguide
Authors: Abbosh A. M. 
Published: November 2011

AbstractA compact three‐way power divider with ultra‐wideband (UWB) performance is presented. The proposed device utilizes a simple and low‐cost broadside‐coupled microstrip‐coplanar waveguide structure. The conformal mapping technique is used to find the dimensions of the device. The simulated and measured output power, return loss, and isolation validate the suitability of the proposed divider for the UWB applications that operate across the frequency band from 3.1 GHz to more than 10.6 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:196–199, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26492
Design of fully printable and configurable chipless RFID tag on flexible substrate
Authors: Shao Botao , Chen Qiang , Liu Ran , Zheng Li‐Rong 
Published: November 2011

AbstractThis article presents the design and implementation of a chipless radio frequency identification (RFID) tag on flexible substrate.The tag is designed based on the sympathetic oscillations of multiple LC (inductor–capacitor) circuits that possess distinct resonant frequencies. Information is encoded by controlling placement of these resonant frequencies. To trade off the readability and size of the tag, the optimizations including capacitor placements and different LC combinations are studied. The tag is then realized onto flexible polyimide substrate using toner‐transferring process. The detection system is also constructed and used to measure the proposed tag. The measurement results show that the tag can provide an excellent readability more than 20 cm reading range. In addition, this tag is fully printable and configurable, hence making it more feasible and considerably cheaper to be used. This tag can provide a meaningful approach toward the realization of ultralow‐cost RFID tags attached onto low‐value items. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:226–230, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26499
Compact, printed, dual‐feed, shorted monopole antenna for concurrent 2.4‐ and 5‐GHz WLAN operation
Authors: Su Saou‐Wen 
Published: November 2011

AbstractA compact and printed monopole antenna having two feeding ports to operate in the 2.4‐ and 5‐GHz bands respectively for concurrent dual‐band operation is proposed.The monopole and the ground plane thereof were formed on a single‐layered FR4 substrate of thickness 1 mm and with the dimensions 30 mm × 37 mm. The main radiating element is of a bent, two‐branched strip monopole, placed 2 mm away from the antenna ground. Each branch provides one resonant path such that two operating bands are generated. It was found that by feeding the monopole on the opposite sides with two shorting portions set therein between, the single antenna can be excited by the 2.4‐ and 5‐GHz radio signals at the same time with the port decoupling below −20 dB. The antenna is simple in structure and has constant strip width. Details of the design prototypes are discussed in the article. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:188–193, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26502
Design of high power capacity phase shifter with composite right/left‐handed transmission line
Authors: Zhu Qi , Gong Chen , Xin Hao 
Published: November 2011

AbstractBased on the structure of composite right/left‐handed transmission line (CRLH‐TL), a novel phase shifter with high power capacity is developed. A new and an accurate equivalent circuit of the CRLH‐TL element is utilized and validated in the phase shifter design. Because the switches are incorporated on the fingers of the CRLH‐TLs, the power going through a single switch is only a fraction of that through the entire phase shifter. As a result, the power handling capacity of the proposed phase shifter can be greatly increased. In addition, multiphase phase shifters can be realized with multiple switches incorporated in a single CRLH‐TL element. A 4‐bit phase shifter and a multiphase phase shifter are designed and tested. The power capacity of the multiphase phase shifter is measured to be higher than most of the conventional phase shifters. The presented phase shifter also possesses other advantages such as low cost, compact size and ease of fabrication. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:119–124, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26505
Compact and high selectivity dual‐band dual‐mode microstrip BPF with five transmission zeros
Authors: Zhang Xue‐shun , Liu Bin , Zhao Yong‐jiu , Wang Ji‐kang , Chen Wen 
Published: November 2011

AbstractIn this letter, a compact and high selectivity dual‐band dual‐mode microstrip bandpass filter (BPF) with the source‐load coupling is proposed using the single short‐circuited stub‐loaded stepped‐impedance resonator.The resonator can generate two resonant modes in each band. The short‐circuited stub at the central can only adjust the even mode resonant frequencies, whereas the odd mode ones are fixed. The resonator utilizes the odd and even mode resonators' fundamental resonant frequencies and second harmonic ones to generate the first and second passbands, respectively. Five transmission zeros are created near the passband edges and in the upper‐stopband to improve the selectivity. Simulation and measurement results of the dual‐band BPF operated at 1.575 and 5.2 GHz demonstrate that the proposed filter is feasible. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:79–81, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26508
Design of a low‐cost steerable textile antenna array operating in varying relative humidity conditions
Authors: Scarpello Maria Lucia , Ginste Dries Vande , Rogier Hendrik 
Published: November 2011

AbstractA new wearable textile antenna array, operating in the 2.45 GHz industrial, scientific, and medical band, is described.Its purpose is to increase signal levels in off‐body indoor communication links thanks to the array gain. In addition, multipath fading is reduced, thanks to its narrow beamwidth. As antenna substrate, we compare two textiles that have very different moisture regains, being cotton fabric and polyurethane foam and evaluate the array performance under varying relative humidity conditions in a controlled environment. Relative humidity has little influence on the mutual coupling, whereas for the reflection coefficients, the array constructed on foam material exhibits the most stable antenna characteristics. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:40–44, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26510
Low‐profile planar roof‐mounted vehicle antenna for monopole vertical polarization reception
Authors: Baek Seunghee , Lim Sungjoon 
Published: November 2011

AbstractA low‐profile planar vehicle antenna for the roof of a car is proposed for use with terrestrial services. Despite its low configuration, the proposed antenna can realize a vertical polarization. To demonstrate its performance, the proposed antenna is mounted on the roof of a mid‐sized vehicle, and the radiation patterns are measured at three different positions. The omnidirectional patterns are observed in an azimuth plane with 2 dBi of peak gain at 2.3 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:91–94, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26513
A compact open‐ended slot antenna design for ultrawideband applications
Authors: Sim Chow‐Yen‐Desmond , Tseng Chih‐Wei , Weng Wei‐Chung 
Published: November 2011

AbstractA compact size slot antenna designed for ultrawideband (UWB) applications is proposed.The slot embedded into the antenna was comprised an open‐ended hemicircular slot and a narrow rectangular slot. To achieve good impedance matching within the desired band of interest, the 50 Ω microstrip feed‐line is loaded with an elliptical slot, while an extended substrate was protruded above the upper edge of the antenna. The experimental results such as return losses, radiation patterns, and gain properties are studied, and good characteristics are demonstrated. Typical frequency domain responses are also measured to ensure that the proposed antenna can provide stable signal transmission within the UWB spectrum. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:86–91, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26514
Young women's representations of sexually transmitted diseases (RoSTD): A psychometric study
Authors: Royer Heather R. , Heidrich Susan M. , Brown Roger L. 
Published: November 2011

AbstractMeasurement of beliefs about sexually transmitted diseases (STDs) is important to understanding sexual health behaviors. The purpose of this study was to develop and test the psychometric properties of the Representations of STDs (RoSTD) Scale. The RoSTD was developed to measure young women's representations of STDs, and it is intended to be used to measure beliefs about any of the seven most common STDs. Confirmatory factor analysis indicated a four‐factor structure for the 40‐item RoSTD: Future Perspective, Cause, Psychosocial Consequence, and Identity. Internal consistency for the subscales (measured for each of seven different STDs) ranged from .67 to .93 and 2‐week test–retest correlations ranged from .69 to .90. The RoSTD shows evidence of reliability and validity in young women. © 2011 Wiley Periodicals, Inc. Res Nurs Health 35:15–29, 2012
Sites of ubiquitin attachment in Saccharomyces cerevisiae
Authors: Starita Lea M. , Lo Russell S. , Eng Jimmy K. , von Haller Priska D. , Fields Stanley 
Published: November 2011

AbstractSites of ubiquitin modification have been identified by mass spectrometry based on the increase in molecular mass of a tryptic peptide carrying two additional glycine residues from the ubiquitin moiety. However, such peptides with GG shifts have been difficult to discover. We identify 870 unique sites of ubiquitin attachment on 438 different proteins of the yeast Saccharomyces cerevisiae.
The impact of CodY on virulence determinant production in community‐associated methicillin‐resistant Staphylococcus aureus
Authors: Rivera Frances E. , Miller Halie K. , Kolar Stacey L. , Stevens Stanley M. , Shaw Lindsey N. 
Published: November 2011

AbstractStaphylococcus aureus is a leading human pathogen of both hospital and community‐associated diseases worldwide. This organism causes a wealth of infections within the human host as a result of the vast arsenal of toxins encoded within its genome. Previous transcriptomic studies have shown that toxin production in S. aureus can be strongly impacted by the negative regulator CodY. CodY acts by directly, and indirectly (via Agr), repressing toxin production during times of plentiful nutrition. In this study, we use iTRAQ‐based proteomics for the first time to study virulence determinant production in S. aureus, so as to correlate transcriptional observations with actual changes in protein synthesis. Using a codY mutant in the epidemic CA‐MRSA clone USA300 we demonstrate that deletion of this transcription factor results in a major upregulation of toxin synthesis in both post‐exponential and stationary growth. Specifically, we observe hyper‐production of secreted proteases, leukocidins and hemolysins in both growth phases in the USA300 codY mutant. Our findings demonstrate the power of mass spectrometry‐based quantitative proteomics for studying toxin production in S. aureus, and the importance of CodY to this central process in disease causation and infection.
A mass spectrometry‐based method to screen for α‐amidated peptides
Authors: An Zhenming , Chen Yudan , Koomen John M. , Merkler David J. 
Published: November 2011

AbstractAmidation is a post‐translational modification found at the C‐terminus of ∼50% of all neuropeptide hormones. Cleavage of the Cα–N bond of a C‐terminal glycine yields the α‐amidated peptide in a reaction catalyzed by peptidylglycine α‐amidating monooxygenase (PAM). The mass of an α‐amidated peptide decreases by 58 Da relative to its precursor. The amino acid sequences of an α‐amidated peptide and its precursor differ only by the C‐terminal glycine meaning that the peptides exhibit similar RP‐HPLC properties and tandem mass spectral (MS/MS) fragmentation patterns. Growth of cultured cells in the presence of a PAM inhibitor ensured the coexistence of α‐amidated peptides and their precursors. A strategy was developed for precursor and α‐amidated peptide pairing (PAPP): LC‐MS/MS data of peptide extracts were scanned for peptide pairs that differed by 58 Da in mass, but had similar RP‐HPLC retention times. The resulting peptide pairs were validated by checking for similar fragmentation patterns in their MS/MS data prior to identification by database searching or manual interpretation. This approach significantly reduced the number of spectra requiring interpretation, decreasing the computing time required for database searching and enabling manual interpretation of unidentified spectra. Reported here are the α‐amidated peptides identified from AtT‐20 cells using the PAPP method.
MACROINVERTEBRATE RESPONSE TO FLOW CHANGES IN A SUBALPINE STREAM: PREDICTIONS FROM TWO‐DIMENSIONAL HYDRODYNAMIC MODELS
Authors: Waddle T. J. , Holmquist J. G. 
Published: November 2011

ABSTRACTTwo‐dimensional hydrodynamic models are being used increasingly as alternatives to traditional one‐dimensional instream flow methodologies for assessing adequacy of flow and associated faunal habitat. Two‐dimensional modelling of habitat has focused primarily on fishes, but fish‐based assessments may not model benthic macroinvertebrate habitat effectively. We extend two‐dimensional techniques to a macroinvertebrate assemblage in a high‐elevation stream in the Sierra Nevada (Dana Fork of the Tuolumne River, Yosemite National Park, CA, USA). This stream frequently flows at less than 0.03 m3 s−1in late summer and is representative of a common water abstraction scenario: maximum water abstraction coinciding with seasonally low flows. We used two‐dimensional modelling to predict invertebrate responses to reduced flows that might result from increased abstraction. We collected site‐specific field data on the macroinvertebrate assemblage, bed topography and flow conditions and then coupled a two‐dimensional hydrodynamic model with macroinvertebrate indices to evaluate habitat across a range of low flows. Macroinvertebrate indices were calculated for the wetted area at each flow. A surrogate flow record based on an adjacent watershed was used to evaluate frequency and duration of low flow events. Using surrogate historical records, we estimated that flow should fall below 0.071 m3 s−1at least 1 day in 82 of 95 years and below 0.028 m3 s−1in 48 of 95 years. Invertebrate metric means indicated minor losses in response to modelled discharge reductions, but wetted area decreased substantially. Responses of invertebrates to water abstraction will likely be a function of changing habitat quantity rather than quality. Copyright © 2011 John Wiley & Sons, Ltd.
Secure Communication with RFID tags in the Internet of Things
Authors: Dominikus Sandra , Kraxberger Stefan 
Published: November 2011

ABSTRACTThe functional capabilities of radio‐frequency identification (RFID) tags are rapidly increasing. Therefore, they can no longer be treated as pure bar‐code substitute, but they should be considered as computing devices. Modern tags are able to store and compute data, or even hold sensors. To draw full advantage from the increased functionality of the tags, it will become important to integrate these tags into the Internet of Things (IoT), that is, enable two‐way end‐to‐end communication over the Internet. Powerful application scenarios can be developed when communication with tags can be established via the network.We introduce the concept of Mobile‐IPv6‐enabled RFID tags to enable a two‐way communication via IPv6. Mobile IPv6 allows integration of passive low‐cost RFID tags into the IoT in a transparent and compatible way. Like the “traditional” Internet, many applications can only be built upon secure communication. Therefore, it is essential to provide securing mechanisms. For the Internet, Internet Protocol Security (IPsec) is used to secure the connection between two nodes. In this paper, we want to define security services analog to IPsec for communication with RFID tags. We analyze the cryptographic capabilities of current RFID tags and build a security layer to enable a secure end‐to‐end connection between tags and other nodes in the net. Copyright © 2011 John Wiley & Sons, Ltd.
Hydrouranium Anomalies as an Effective Tool in Exploration of Concealed Unconformity Related U-deposit in Srisailam Subbasin, Andhra Pradesh - Case Study from Chitrial Area
Authors: Verma M. B. , Dandele P. S. , Babu G. Nagendra , Umamaheswar K. , Maithani P. B. 
Published: November 2011

Abstract
Relationship of hydro-uranium anomalies (2-649 ppb) vis-à-vis underlying uranium ore body has been attempted based on seventy nine water samples collected from the exploratory boreholes on the northern periphery of Srisailam sub basin, Nalgonda district, A.P. Water table is hosted in the granitoid aquifer which underlies the cover rocks of Srisailam Formation. TDS (total dissolved salt) range from 123 to 1088 ppm (x– = 329 ppm) and analyzed &gt;500 ppm in eight samples. Water samples show a strong positive correlation of TDS with Cl– (r=0.90), Na+ (r=0.82), Mg (r=0.80) and a moderate positive correlation with Sr (r=0.48) and Ca (r=0.70). Low value (&lt;0.4) of Normalised Magnesium (NMg) indicates that host rock aquifer has not undergone chloritisation. Accumulate contour plan of uranium ore body shows NW-SE trend and coincides with the hydro-uranium contour. Correlation sections of ore body display true as well as false hydro-uranium anomalies in N-S and E-W profiles. Hydro-uranium anomalies owe their origin to uranium cations, dissolved from the mineralized horizon in to groundwater. Hydro-geochemical orientation survey carried out at Chitrial plateau may be applied regionally in the Srisailam sub basin as an effective tool to explore the concealed unconformity type uranium mineralization below Srisailam Formation.