bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reconfigurable antenna using capacitive loading to Artificial Magnetic Conductor (AMC)
Authors: Dewan Raimi , Rahim M. K. A. , Hamid M. R. , Majid H.A. , Yusoff M.F.M. , Jalil M.E. 
Published: July 2016

ABSTRACTA dual band Artificial Magnetic Conductor (AMC) with capacitive tuning of reflection phase at lower band frequency is proposed. The AMC operates at upper band of fixed frequency at 5.8 GHz while the lower band reconfigurable frequency is from 2.5 GHz up to 3.1 GHz. The simulated reconfigurable frequencies are 2.5, 2.62, and 3.10 GHz. The corresponding resonance structure for each band is circular patch and circular slotted ring with single capacitor per AMC unit cell. Subsequently, the AMC is incorporated with conventional UWB antenna. The effects of AMC capacitive tuning to UWB antenna performance are studied in terms of frequency reconfigurability, gain, and radiation patterns. Measurement is also carried out for the reflection coefficient and radiation patterns. Parametrical studies of the antenna such as the misalignment between the top and bottom substrate layers, air gap between the substrate layers, and capacitance tolerance of the capacitor to the reflection coefficients are also discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2422–2429, 2016
Multi‐mode resonator‐based ultra‐wideband power divider
Authors: Mondal Pratik , Kumar Parui Susanta 
Published: July 2016

ABSTRACTA 3dB broadband power divider has been designed using multi‐mode resonator (MMR) technique. It resonates in four different modes of frequencies. Out of these, three of them are responsible for broadening the operating band, which may be controlled precisely by the impedance ratio of the resonator. It shows an equal magnitude, in‐phase power division at outputs from 3.1 to 10.7 GHz, which complies the FCC defined UWB. It has advantages like single layer design, via less, compact and operating band is tunable by the dimensions of the MMR. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2419–2422, 2016
A wide‐range demodulation method for FBG sensor
Authors: Chen Jiajia , Shi FuQuan , Lei Xueqin , Peng Baojin 
Published: July 2016

ABSTRACTThe principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor based on matching grating are introduced. The FBG sensor requires several fiber gratings to demodulate. This study proposes a simple signal detection method to demodulate the resonance wavelength shift of the FBG. Photodiodes convert the reflected light signal of every fiber grating into electrical signal. The reflected light signals are then collected by a computer through a data collection box. The physical quantity is reported in real time according to the calibrated data. This method has a wider range of demodulation and displays the drift of center wavelength of sensor FBG in real time. The temperature/strain cross‐sensitivity issue of FBG sensor is solved to some extent due to the same temperature drift of the same type of FBG. Experimental results show that the system has a wavelength measurement error of less than 0.009 nm, and the corresponding microstrain measurement error is less than 7.5 με. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2416–2419, 2016
Broadband CPW—fed star shape patch antenna backed by rectangular ring ground plane
Authors: Deshmukh Amit A. , Agrawal Sudesh R. , Lele Kshitij A. , Ray K. P. 
Published: July 2016

ABSTRACTA novel design of broadband CPW‐fed star shape patch antenna backed by rectangular ring ground plane is proposed. The star shape patch realized by combining two triangular shape patches, yields bandwidth of more than 5 GHz (>130%). Over the bandwidth, proposed antenna shows broadside radiation pattern with a peak gain of 3 dBi. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2443–2450, 2016
Wireless power transfer in near‐field communication using a current‐controlled multi loops with a loaded capacitance
Authors: Memon Mehran , Rahim Abdul , Eteng Akaa 
Published: July 2016

ABSTRACTWireless power transfer (WPT) in near‐field communication (NFC) using current‐controlled multi loops with a loaded capacitance is demonstrated in this work. The proposed multi loops antenna design shows low mutual inductance and transfer efficiency required within the operating distance of 1 cm to 3 cm and ratio of the current between the loops was done by varying the value of loaded capacitor used in between loops. The results was changing rapidly due mismatch of impedance between antennas at different distance. Initially simulation of antenna designs were not performing therefore a new design was proposed. All antennas are first impedance matched at 1 cm but after optimization proposed antenna was matched at 3 cm. The proposed loop design show better transfer efficiency for WPT up to 3 cm. In this paper, receiving antenna is placed in different close proximity from 1 cm to 5 cm with respective to transmitting antenna. The results of conventional loop and single current‐controlled loop and proposed multi loop antenna shows that transfer efficiency of the proposed multi loop antenna is better from others and maintaining low mutual inductance at given distance. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2472–2476, 2016
A compact tunable microwave bandpass filter based on liquid crystal
Authors: Jiang Di , Liu Yupeng , Yang Yuanwang , Gan Baichuan , Cao Weiping 
Published: July 2016

ABSTRACTIn this Letter, with the application of liquid crystal (LC) an electrically tunable microwave filter has been designed, manufactured, and characterized. The proposed compact filter has been realized on a particularly configured cavity which was constructed with low cost inverted‐microstrip structures and conventional resonance structure. By applying low square‐wave (1KHz) voltages, low power consumption is involved. The filter responses have been allocated at k‐band of microwave frequency at which band many communications and radar applications applied. The proposed filter occupies a compact area of 19 mm × 17 mm only. The measured results have shown that the proposed filter realized the central frequency changing from 15.5 GHz to 16.5 GHz continuously with bias voltages changing between 0 and 10 V. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2470–2472, 2016
A compact multilayer dual‐band bandpass filter using shunt architecture by ltcc process for global WLAN applications
Authors: Chen Li‐Ju , Lin Ken‐Huang 
Published: July 2016

ABSTRACTThis investigation proposes a compact multilayer dual‐band bandpass filter design with shunt architecture. The proposed dual‐band filter has dual passband to meet the requirement of different operating frequencies. The first (I) and second (II) passbands with small insertion loss have bandwidths of around 380 and 1350 MHz to cover all IEEE 802.11 bands in different regions of the world. This dual‐band filter has multiple transmission zeros to provide high rejection level as well. The presented filter was fabricated by technology of low temperature co‐fired ceramic (LTCC), resulting in a miniaturized dimension of only 2.5 mm (L) × 2.0 mm (W) × 0.7 mm (H). Finally, the measured results are in a good agreement with the simulated ones. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2493–2496, 2016
A high‐isolation linear folded mixer for ISM band in UMC 180NM CMOS technology
Authors: Bhatt Darshak , Mukherjee Jayanta , Redouté J.‐M. 
Published: July 2016

ABSTRACTThis paper presents an integrated radio frequency (RF) downconversion folded mixer that operates in the 2.4 GHz industrial, scientific, and medical (ISM) band by using UMC 180 nm RF CMOS. It is implemented by using a double‐balanced transconductance switch (GmSw) configuration. The proposed mixer converts the incoming signal to a small signal RF current followed by a PMOS current mirror structure. The circuit can operate with a power supply of less than 1.8 V. A superior isolation is achieved by incorporating a novel folded structure with a CMOS local oscillator (LO) stage. The proposed folded mixer achieves 7 dB of conversion gain and 8.5 dBm of the third order input intermodulation product. The highest measured isolation between the LO‐IF, RF‐IF, and LO‐RF ports is 50, 45, and 65 dB, respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2461–2466, 2016
A 1.8/2.6 GHz high efficiency dual‐band harmonic controlled, 50W GAN power amplifier with wide bandwidth characteristics
Authors: Zhang Shipeng , Kim Jiyeon , Kim Jong‐Heon 
Published: July 2016

ABSTRACTA high efficiency dual band 50W GaN HEMT power amplifier is presented at 1.8 GHz and 2.6 GHz. An impedance matching network of the dual band amplifier at the fundamental and second harmonic frequencies is constructed to obtain wide bandwidth characteristics with reduction of sensitivity to impedance variation with frequency fluctuations. The matching network is composed of a three‐stage transmission line and an open‐ended stub with low Q‐factors. A T‐type DC bias line is performed to control impedances at second harmonic frequencies. From the measured results, the proposed dual band GaN HEMT amplifier achieved a minimum of 55% efficiency at 1.8 GHz and 2.6 GHz with a 300 MHz bandwidth for a maximum output power of 47 dBm. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2496–2500, 2016
Feasibility study of efficient wireless power transmission in satellite interior
Authors: Wu Jun , Liang Jiemei , Wang Xin , Chen Chen , Zhang Xiaotong , Lu Mingyu 
Published: July 2016

ABSTRACTA full‐wave simulation tool based on the method of moments is developed and validated by experiments to study the feasibility of wireless power transmission in rectangular cavity that emulates satellite interior. Our results demonstrate power transmission efficiency higher than 80% in a cubic cavity with dimension of 1 cubic‐meter. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2518–2522, 2016
A SRR loaded triple band slot array antenna with high gain, improved cross polarization, and front‐to‐back radiation
Authors: Chandra Avinash , Das Sushrut 
Published: July 2016

ABSTRACTThis article presents a split ring resonator (SRR) loaded triple band waveguide broad wall longitudinal slot array antenna. Three uniformly spaced SRRs have been placed on the transverse plane of a slotted rectangular waveguide. The measured result shows that the antenna has 10 dB return loss bandwidth of 8.38–8.62 GHz, 9.17–9.43 GHz, and 10.63–11.34 GHz. The gain and radiation pattern of the antenna are also plotted. The gain, cross polarization ratio, and front to back radiation ratio of the proposed antenna are found to be higher than that of a conventional broad wall longitudinal slot array antenna. An equivalent circuit of triple band antenna is also presented. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2500–2505, 2016
Chronic peripheral nerve compression disrupts paranodal axoglial junctions
Authors: Otani Yoshinori , Yermakov Leonid M. , Dupree Jeffrey L. , Susuki Keiichiro 
Published: July 2016

ABSTRACTIntroductionPeripheral nerves are often exposed to mechanical stress leading to compression neuropathies. The pathophysiology underlying nerve dysfunction by chronic compression is largely unknown.MethodsWe analyzed molecular organization and fine structures at and near nodes of Ranvier in a compression neuropathy model in which a silastic tube was placed around the mouse sciatic nerve.ResultsImmunofluorescence study showed that clusters of cell adhesion complex forming paranodal axoglial junctions were dispersed and overlapped frequently with juxtaparanodal components. These paranodal changes occurred without internodal myelin damage. The distribution and pattern of paranodal disruption suggests that these changes are the direct result of mechanical stress. Electron microscopy confirmed loss of paranodal axoglial junctions.ConclusionsOur data show that chronic nerve compression disrupts paranodal junctions and axonal domains required for proper peripheral nerve function. These results provide important clues toward better understanding of the pathophysiology underlying nerve dysfunction in compression neuropathies. Muscle Nerve 55: 544–554, 2017
In‐tube collision‐induced dissociation for selected ion flow‐drift tube mass spectrometry, SIFDT‐MS: a case study of NO+ reactions with isomeric monoterpenes
Authors: Spesyvyi Anatolii , Sovová Kristýna , Španěl Patrik 
Published: July 2016

RationaleSoft chemical ionisation techniques including selected ion flow tube mass spectrometry, SIFT‐MS, and proton transfer reaction mass spectrometry, PTR‐MS, cannot currently quantify individual isomers present simultaneously in samples, a notable example being atmospheric monoterpenes. A possible solution lies in integrating in‐tube collision‐induced dissociation, CID, into a selected ion flow‐drift tube mass spectrometry, SIFDT‐MS, instrument.MethodsIn‐tube CID was implemented by applying electrostatic potential difference between the resistive glass flow‐drift tube downstream end and the nose cone of a quadrupole mass spectrometer. The resulting inhomogeneous electric field accelerates the product ions along the last 1 mm before the nose cone and causes their dissociation in collisions with molecules of the buffer gas (4% air, 96% helium, 2 mbar). Mass spectra of the product ions of NO+ reactions with 3‐carene, β‐pinene, (S)‐limonene and their mixture were obtained for variable potential difference.ResultsPotential difference up to 47.7 V resulted in dramatic changes in the mass spectra due to fragmentation of the monoterpene radical molecular cations. The main observed fragments correspond to logical losses from different isomeric structures. Fragmentation increases with the potential difference and can be interpreted as single collision dissociation on air molecules at centre‐of‐mass energies of several eV. Combination of fragmentation patterns at different CID enables distinction of isomers in the mixture on the basis of pseudoinversion.ConclusionsIn‐tube CID represents a simple and low‐cost extension to SIFDT‐MS that allows real‐time identification of isomeric products of ion‐molecule reactions on the basis of their structural differences and corresponding changes in fragmentation patterns with CID energy without significantly changing the net reaction time important for absolute quantification. Copyright © 2016 John Wiley & Sons, Ltd.
Clinical Significance of the Endoscopic Finding in Predicting Complete Tumor Response to Preoperative Chemoradiation Therapy in Rectal Cancer
Authors: Lim Sun Gyo , Kim Young Bae , Oh Seung Yeop 
Published: July 2016

AbstractBackgroundThere are reports that suggest conservative treatment when a tumor shows clinically complete response (CR) after preoperative chemoradiotherapy in rectal cancer. The aim of this study is to investigate the association between endoscopic complete response (E‐CR) and pathologic CR (pCR) and to determine the sensitivity and specificity of E‐CR and its clinical utility after preoperative chemoradiotherapy in rectal cancer.MethodsWe analyzed prospectively collected data of patients with middle and lower rectal cancers who underwent preoperative chemoradiotherapy, between January 2010 and January 2015.ResultsNineteen patients (17.9 %) showed E‐CR, and 87 patients showed E‐non CR. Twenty‐three patients (21.7 %) were confirmed to have pCR. E‐CR was closely associated with pCR (p < 0.001). E‐CR reflected pCR with an accuracy of 88.7 %, sensitivity of 65.2 %, specificity of 95.2 %, PPV of 78.9 %, NPV of 90.8 %, and a p value of <0.001.ConclusionsE‐CR after preoperative chemoradiotherapy in rectal cancer is significantly associated with pCR. However, a wait and see policy should be performed carefully with current endoscopic prediction for pCR to avoid inadequate treatment in patients who show E‐CR after preoperative chemoradiotherapy.
Phenotypic shift of an alien piscivorous chub following translocation from a large lake to small irrigation ditches
Authors: Kurita Yoshihisa , Onikura Norio 
Published: July 2016

AbstractThe piscivorous chub (Opsariichthys uncirostris) is a Japanese predatory cyprinid with a native distribution restricted to a few large lakes. It has now established in a large region of Japan following accidental translocation. Although large water bodies with abundant food resources were long considered essential for establishing this species, the chub has settled in small irrigation ditches in Kyushu. In this study, we explored the phenotypic responses of the chub in these small water bodies by comparing life history traits and morphology with those of chub inhabiting a native lake. Growth rate, fecundity‐related traits, and trunk length shifted markedly following translocation to the new habitat. These phenotypic shifts were typical reactions to characteristic conditions of irrigation ditches, such as habitat instability, lotic conditions, and limited food. Adaptability via a rapid phenotypic shift by the chub may have facilitated establishment of populations in small irrigation ditches.
Cloning and Characterization of Lxr and Srebp1, and Their Potential Roles in Regulation of LC‐PUFA Biosynthesis in Rabbitfish Siganus canaliculatus
Authors: Zhang Qinghao , You Cuihong , Liu Fang , Zhu Wendi , Wang Shuqi , Xie Dizhi , Monroig Óscar , Tocher Douglas R. , Li Yuanyou 
Published: July 2016

AbstractRabbitfish Siganus canaliculatus was the first marine teleost demonstrated to have the ability to biosynthesize C20–22 long‐chain polyunsaturated fatty acid (LC‐PUFA) from C18 PUFA precursors, which is generally absent or low in marine teleosts. Thus, understanding the molecular basis of LC‐PUFA biosynthesis in rabbitfish will contribute to efforts aimed at optimizing LC‐PUFA biosynthesis in teleosts, especially marine species. In the present study, the importance of the transcription factors liver X receptor (Lxr) and sterol regulatory element‐binding protein 1 (Srebp1) in regulation of LC‐PUFA biosynthesis in rabbitfish was investigated. First, full‐length cDNA of Lxr and Srebp1 were cloned and characterized. The Lxr mRNA displayed a ubiquitous tissue expression pattern while Srebp1 was highly expressed in eyes, brain and intestine. In rabbitfish primary hepatocytes treated with Lxr agonist T0901317, the expression of Lxr and Srebp1 was activated, accompanied by elevated mRNA levels of Δ4 and Δ6/Δ5 fatty acyl desaturase (Fad), key enzymes of LC‐PUFA biosynthesis, as well as peroxisome proliferator‐activated receptor γ (PPARγ). In addition, Srebp1 displayed higher expression levels in liver of rabbitfish fed a vegetable oil diet or reared at 10 ppt salinity, which were conditions reported to increase the liver expression of Δ4 and Δ6/Δ5 Fad and LC‐PUFA biosynthetic ability, than fish fed a fish oil diet or reared at 32 ppt, respectively. These results suggested that Lxr and Srebp1 are involved in regulation of LC‐PUFA biosynthesis probably by promoting the expression of two Fad in rabbitfish liver, which, to our knowledge, is the first report in marine teleosts.
Perioperative Nurse Leaders and Professionalism
Authors: Whiteside Dawn 
Published: July 2016

AbstractProfessionalism in nursing leadership encompasses key elements that include a common body of knowledge, autonomous practice, self‐regulation through education and licensure, a set code of ethics, and a commitment to altruism. Perioperative nurse leaders also must embrace collaboration, vision, accountability, and patient and staff member advocacy based on established ethics, values, and standards of care. Nurse leaders who are committed to professional development through pursuit of higher degrees, application of evidence‐based practice, collaboration with colleagues, and certification show a strong commitment to their profession and serve as role models for staff members. This article discusses professionalism in nursing and offers information specific to perioperative nurse leaders.
Autoimmunity affects health‐related quality of life in patients with Hashimoto's thyroiditis
Authors: Bektas Uysal Hilal , Ayhan Mediha 
Published: July 2016

AbstractHashimoto's thyroiditis (HT) is the most common endocrine disorder leading to hypothyroidism. HT is characterized by the presence of elevated circulating antibodies, especially anti‐thyroid peroxidase (anti‐TPO) and anti‐thyroglobulin (anti‐Tg). In our study, we aimed to reveal the effects of autoimmunity on health‐related quality of life of euthyroid HT patients. Patients who were admitted to the Adnan Menderes University Outpatient Clinic were enrolled. The medical records of the patients were surveyed and their demographical data were collected. By using communication data, the patients were invited to our clinic, to inform them about our study and to fill out the health‐related quality of life questionnaire. A total of 84 euthyroid HT patients older than 18 years who completed the short form‐36 questionnaire, were enrolled. As all patients were euthyroid, there was a significant negative correlation between each domain score and the antibody levels, individually. Patients who had higher anti‐TPO and anti‐Tg levels had significantly lower quality of life domain scores (p < 0.001). There was statistically no significant correlation between the antibody levels and thyroid function tests (p > 0.05). Additionally, all dimension scores were significantly higher both in the anti‐Tg and anti‐TPO negative groups, indicating a better quality of life than that in the antibody positive groups. Our study revealed that higher thyroid antibody levels were negatively correlated with life quality scores. Thus, patients who had higher anti‐TPO and anti‐Tg levels had significantly lower quality of life domain scores. We believe that apart from hypothyroidism, a high antibody level was one of the contributing factors for the development of HT‐associated symptoms, leading to a lower quality of life. Other probable contributing factors such as selenium deficiency, thyroid hormone fluctuation, and disease awareness should keep in mind.