bluuebunny/crossref_metadata_2025_split huggingface dataset:
Malignant otitis externa hospitalizations: Analysis of patient characteristics
Authors: Sylvester Michael J. , Sanghvi Saurin , Patel Viral M. , Eloy Jean Anderson , Ying Yu‐Lan Mary 
Published: November 2016

Objectives/HypothesisMalignant otitis externa (MOE) is a rare disorder that is not well studied in the inpatient setting. The Nationwide Inpatient Sample (NIS) database was utilized to analyze characteristics and predischarge outcomes of hospitalized MOE patients.MethodsMOE hospitalizations were identified in the 2002 to 2013 NIS. Patient demographics, length of hospital stay, hospital charges, concomitant diagnoses, treatment‐related procedures, complications, and in‐hospital mortality rates were examined, with comparisons made among age cohorts and between diabetes mellitus (DM) and non‐DM groups.ResultsA total of 8,300 cases of inpatient MOE were identified, with elderly DM patients compromising 22.7% of cases. Compared to adults, elderly patients had more inpatient procedures, longer hospitalizations (6.0 vs. 4.3 days), higher hospital charges ($26,712 vs. $19,047) (allP< 0.001), greater odds of in‐hospital complications, and in‐hospital mortality (odds ratio 14.435, 95% confidence interval 5.313–39.220). Adult/elderly patients with DM had more comorbidities, longer hospital stays (5.5 vs. 4.0 days), and higher hospital charges ($25,118 vs. $17,039) (allP< 0.001) than non‐DM patients. However, DM was not associated with greater in‐hospital mortality rates (0.6% vs. 0.5%;P= 0.640). Compared to the adult/elderly cohort, pediatric patients had higher rates of nonelective admissions (19.8% vs. 14.5%), shorter hospital stays (2.9 vs. 4.9 days), and lower hospital charges ($8,876 vs. $21,672) (allP< 0.05).ConclusionElderly diabetic patients made up a smaller fraction of hospitalized MOE cases than anticipated. Elderly patients had greater in‐hospital complications and mortality. Diabetes mellitus in adult/elderly patients was not associated with increased mortality. Pediatric patients fared well with low complications rates and no instances of in‐hospital mortality.Level of Evidence2C.Laryngoscope, 127:2328–2336, 2017
Effects of voice‐sparing cricotracheal resection on phonation in women
Authors: Tanner Kristine , Dromey Christopher , Berardi Mark L. , Mattei Lisa M. , Pierce Jenny L. , Wisco Jonathan J. , Hunter Eric J. , Smith Marshall E. 
Published: November 2016

IntroductionIndividuals with idiopathic subglottic stenosis (SGS) are at risk for voice disorders prior to and following surgical management. This study examined the nature and severity of voice disorders in patients with SGS before and after a revised cricotracheal resection (CTR) procedure designed to minimize adverse effects on voice function.MethodEleven women with idiopathic SGS provided presurgical and postsurgical audio recordings. Voice Handicap Index (VHI) scores were also collected. Cepstral, signal‐to‐noise, periodicity, and fundamental frequency (F0) analyses were undertaken for connected speech and sustained vowel samples. Listeners made auditory‐perceptual ratings of overall quality and monotonicity.ResultsPaired samples statistical analyses revealed that mean F0 decreased from 215 Hz (standard deviation [SD] = 40 Hz) to 201 Hz (SD = 65 Hz) following surgery. In general, VHI scores decreased after surgery. Voice disorder severity based on the Cepstral Spectral Index of Dysphonia (KayPentax, Montvale, NJ) for sustained vowels decreased (improved) from 41 (SD = 41) to 25 (SD = 21) points; no change was observed for connected speech. Semitone SD (2.2 semitones) did not change from pre‐ to posttreatment. Auditory‐perceptual ratings demonstrated similar results.ConclusionThese preliminary results indicate that this revised CTR procedure is promising in minimizing adverse voice effects while offering a longer‐term surgical outcome for SGS. Further research is needed to determine causal factors for pretreatment voice disorders, as well as to optimize treatments in this population.Level of Evidence4. Laryngoscope, 127:2085–2092, 2017
Time‐ and strain‐specific downregulation of intestinal EPAS1 via miR‐148a by Bifidobacterium bifidum
Authors: Taibi Amel , Singh Natasha , Chen Jianmin , Arioli Stefania , Guglielmetti Simone , Comelli Elena M. 
Published: November 2016

ScopeBifidobacteria play a role in intestinal homeostasis but molecular mechanisms remain underinvestigated. The aim of this study was to assess if probiotic Bifidobacterium strains alter expression of intestinal microRNA and downstream target gene response.Methods and resultsThe expression of miR‐148a and its validated target endothelial PAS domain protein 1 (EPAS1) was analyzed in Caco‐2 cells and mice cecum in response to Bifidobacterium bifidum MIMBb75, B. bifidum NCC390, or Bifidobacterium longum NCC2705.In vitro, exposure to B. bifidum MIMBb75, but not to B. bifidum NCC390 or B. longum NCC2705, increased the expression of miR‐148a after 1 and 4 h (p < 0.01), but not after 24 h. In vivo, B. bifidum MIMBb75 administration to C57BL/6J mice increased miR‐148a expression in the cecum after 2 but not 14 days (p < 0.05). The increase in miR‐148a was accompanied by a decrease in EPAS1 expression in Caco‐2 cells and cecum (p < 0.05). Silencing of miR‐148a reversed B. bifidum MIMBb75 dependent downregulation of EPAS1.ConclusionThis study shows an early response of intestinal cells to B. bifidum MIMBb75 through miR‐148a modulation. This brings a new concept of strain‐ and time‐dependent bifidobacteria–host crosstalk via microRNA. Probiotic B. bifidum MIMBb75 may help attenuating EPAS1 overexpression associated with intestinal inflammation.
Compact size tapered slot antenna array for ultra broadband applications
Authors: Alsulaiman Sulaiman , Ashraf M. A. , Jamil Khalid , Shoaib Mobien , Alshebieli Saleh 
Published: November 2016

ABSTRACTIn this article, we present a compact sized wideband coupled slot balanced TSA array covering 4–25 GHz band. The measured reflection coefficients and mutual coupling values between adjacent elements are <−10 dB and −15 dB, respectively over the proposed band. The designed array is then tested in a direction finding application. In our experimental setup we used an arbitrary waveform generator (AWG) to generate and transmit a source signal of 2 GHz bandwidth at central frequency of 10 GHz. The output of the antenna array is connected to a high‐speed digital signal oscilloscope. The recorded received signals are then digitally down‐converted and post‐processed using cross‐correlation method to find the source direction at various scan angles. All measurements are done in anechoic chamber to avoid multipath reflections. The experimental results are in reasonable agreement with theoretical calculations. Our experimental work of direction finding using AWG is an exemplary work to realize a practical UWB test‐bed for developing various UWB applications working in real conditions. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:26–31, 2017
Evaluation of a tumor detection microwave system with a realistic breast phantom
Authors: Koutsoupidou Maria , Karanasiou Irene S. , Kakoyiannis Constantine G. , Groumpas Evangelos , Conessa Christophe , Joachimowicz Nadine , Duchêne Bernard 
Published: November 2016

ABSTRACTIn this article, we describe recent advances regarding a novel microwave imaging system intended to be used for in‐depth inspection of breast tissues. The system is made of a circular five‐element antenna array surrounding the breast that can be moved axially to perform a scan of the entire breast. The performance of the system is studied, both numerically and experimentally with a realistic anthropomorphic breast phantom, as a proof of concept of its fast and accurate screening ability to detect tumor‐like inclusions. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:6–10, 2017
High selective frequency response in a complementary split ring resonator based transmission line
Authors: Zhang Dawei , Wu Qun , Sha Xuejun 
Published: November 2016

ABSTRACTIn this letter, a microstrip line based on complementary split ring resonator (CSRR) technology and coupled with square open‐loop resonator (OLR) is presented. The addition of OLR to the conventional CSRR‐loaded unit cell generates transmission zero in the upper stop band and improves the upper band rejection level without increasing the traversal dimensions. Consequently, a new high selective passband with increased bandwidth and a pair of transmission zeros at both lower and upper sides are formed due to the appropriate couplings among the resonators and the host microstrip line. Moreover, the geometry of the basic cell is quite simple without requiring complex configurations and via holes which is easy to fabricate and low in cost. For demonstration, a two‐stage transmission line prototype is fabricated and tested to experimentally validate the attractive out‐of‐band performance (>36 dB) for filter applications as predicted in theory. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:12–15, 2017
A new broadband dual‐layer monoplolar circular patch antenna with slot coupling
Authors: Chen Jie , Liu Juhua 
Published: November 2016

ABSTRACTA new center‐fed dual‐layer circular patch antenna is proposed for bandwidth enhancement. The proposed antenna consists of a circular ground plane, a slotted circular patch on the lower layer and a parasitic circular patch on the top layer. The slotted circular patch is fed with a coaxial probe. With the help of the slots introduced to the lower patch, the parasitic patch on the top layer is strongly coupled. With the strong coupling of the two patches, a broadband is obtained. A prototype is fabricated. The measured results show that a wide bandwidth of 25% is obtained. Within the bandwidth, the measured peak gain is in the range of 6.2–8.7 dBi. The antenna produces an omnidirectional pattern in the horizontal plane, similar to that generated by a conventional monopole antenna. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:40–43, 2017
An all‐dielectric band‐stop frequency‐selective surface
Authors: Yun Junsik , Choi Jaehoon 
Published: November 2016

ABSTRACTIn this paper, an all‐dielectric band‐stop frequency‐selective surface (FSS) is proposed for X‐band applications. The unit particle of the FSS consists of a thick upper hexagonal prism part and a thin lower hexagonal prism part for monolithic construction. The proposed FSS has a planar array of hexagonal ceramic prisms with a honeycomb‐shaped structure. The proposed FSS has three resonant dips. These are combined to establish a −10 dB fractional bandwidth (FBW) with a broad stop‐band of 31.8% (center frequency of 9.75 GHz). To demonstrate the resonant characteristic modes, cylindrical cavity mode analysis based on cylindrical wave functions is used. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:56–60, 2017
A high‐sensitivity refractometer based on etched thin‐core fiber modal interferometer
Authors: Jiang Meng , Wang Ze‐Ming , Zhao Zhong‐Ze , Li Kun , Zhang Yixin 
Published: November 2016

ABSTRACTWe present a high‐sensitivity refractive‐index sensor based on etched thin‐core fiber (TCF) modal interferometer. The sensor structure is formed by splicing a TCF between two single‐mode fibers. To enhance the sensitivity, the thickness of the cladding of sensing region is reduced by hydrofluoric etching. The sensors with different diameters are investigated, and the maximum sensitivity of this new structure is 512nm/R.I.U with fiber diameters of 60 um, which is 4 times higher than that of the basic structure without etching. This structure shows the merits of high sensitivity, low cost, easy control, simplicity of fabrication, and high repeatability. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:53–56, 2017
Single‐layer differential CPW‐FED UWB antenna with common‐mode suppressed and band notched applications
Authors: Lu Liang , Jiao Yong‐Chang , Wang Rui‐Qi , Zhang Chi , Qiu Miao‐Miao 
Published: November 2016

ABSTRACTA single‐layer differential coplanar waveguide (CPW) fed antenna is proposed for common‐mode suppressed and WLAN band notched ultra‐wideband (UWB) applications. The UWB nature is generated by the stepped slot radiators and a pair of differential stepped CPW feeding lines. When two ports of the antenna are fed with common‐mode signals, the radiator cannot be excited and common‐mode suppression is obtained. Moreover, a pair of U‐shaped slits and stubs are etched on the CPW lines and stepped slots to earn a notch band characteristic. Then, to validate the presented antenna, a prototype antenna is fabricated and tested. The proposed antenna shows experimentally differential reflection coefficients −10 dB bandwidth of 122.6% (2.54 − 10.6 GHz). A measured band notch at 5.1–5.9 GHz for WLAN band is also obtained. Moreover, the common‐mode suppression within the operating band better than 1.5 dB is achieved. All the results show that the proposed antenna can be widely used in UWB wireless communication systems, medical imaging systems and vehicular radars. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:73–77, 2017
Broadband beam‐steering reconfigurable antenna
Authors: Li Zhouyuan , Bahceci Israfil , Cetiner Bedri A. 
Published: November 2016

ABSTRACTA broadband reconfigurable antenna (RA) capable of steering its main beam into three different directions is presented. The ∼15% bandwidth of the antenna covers the frequency range of ∼5.1 – 5.9 GHz compatible with IEEE 802.11ac standard. This RA consists of an aperture‐coupled stacked patch with a parasitic layer placed above it. The surface of the parasitic layer has a grid of 3 × 2 electrically small rectangular‐shaped metallic pixels. The pixels are connected/disconnected by means of switching resulting in reconfigurability in beam‐direction. Only two PIN diode switches are utilized to provide three beam‐steering directions yielding a simple RA. The simulations and measurements from fabricated prototypes show that the antenna maintains its beam‐steering capability with a flat maximum realized gain (∼6.5 dB) over the whole operational bandwidth. An RA Array (RAA) formed by the linear combination of four (4 × 1) identical RA elements is also designed, fabricated and measured. Despite being linear this RAA is capable of performing beam‐steering in the plane, which is perpendicular to the plane containing the central line of the array. The measured and simulated results agree well indicating a flat maximum realized array gain of ∼12.2 dB from 5.2 to 5.8 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:63–65, 2017
Multilayer cylindrical invisibility cloak at microwave frequencies built from polymer and carbon nanotubes
Authors: Danlée Yann , Huynen Isabelle , Bailly Christian 
Published: November 2016

ABSTRACTWe present a multilayered invisibility cloak effective at microwave frequencies based on carbon nanotubes (CNT) and polymer foam. The structure deflects transverse magnetic (TM) waves at 6GHz to reconstruct the incoming wave front beyond an obstacle. This is achieved with the help of nested cylindrical arrangements of anisotropic conductive films and insulating foam spacers, which provide the correct gradient of effective permittivity in the radial direction. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:65–69, 2017
Analytical synthesis of coupling matrix for a dual mode dual band filter
Authors: Rezaee Morteza , Attari Amir Reza 
Published: November 2016

ABSTRACTIn this article, a simple approach for synthesis of coupling matrix of dual mode dual band filters is presented. Odd and even modes of dual mode cavities are used as basis of this coupling matrix. Each mode of cavities is coupled to the same mode of the adjacent cavity independent from the other mode and hence, two separate paths, odd path and even path, are provided from source to load. Therefore, the sensitivity of filter with respect to the fabrication tolerance is reduced. For validation of this approach, the coupling matrix of two‐cavity dual mode dual band filter is calculated and also, a dual mode dual band SIW filter by using corner cut square SIW cavities is designed and realized. Filter prototype is fabricated on a single layer substrate using PCB technology and the measured results are in a good agreement with the simulated results. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:80–83, 2017
Compact and narrowband LTCC filter using vertically stacked end‐coupled resonators
Authors: Li Yufu 
Published: November 2016

ABSTRACTA compact and narrowband low temperature co‐fired ceramic (LTCC) bandpass filter (BPF) is proposed using vertically stacked half‐wavelength end‐coupled resonators. The multilayered end‐coupled stripline resonators are stacked and buried into LTCC substrate for vertical end‐coupling and size reduction. The coupling strength between adjacent resonators is adjustable by offsetting the intermediate ground layer. A narrowband fractional bandwidth (FBW) of 1.9% and a significant size reduction of 80% are achieved. Measurements agree with the simulation results well. Performance and size reduction comparisons and discussions are also implemented. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:86–89, 2017
On the constraint of passive RFID sensor tag design with MOEA/D‐DE
Authors: Song Xiaotian , Wang Gang , Yang Chenwei , He Yuxing 
Published: November 2016

ABSTRACTFor passive RFID sensor tag, high sensing sensitivity is achieved at the expense of read range reduction with a fixed transmitted power of RFID reader. To maximize sensing sensitivity and ensure satisfied communication performance of tag at meanwhile, the constraint between them can be defined as a multi‐objective problem. The MOEA/D‐DE (multi‐objective evolutionary algorithm based on decomposition combined with differential evolution) is applied for the first time to provide a direct and effective solution to this constraint. For demonstration, an effective permittivity sensor and a temperature sensor are designed with MOEA/D‐DE, respectively. Both the simulated and measured results show the feasibility of applying MOEA/D‐DE to design high‐sensitivity sensor tag with satisfied communication performance. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:83–86, 2017
Modified annular ring patch fed cylindrical dielectric resonator antenna for WLAN/WIMAX applications
Authors: Kumar Sahu Nikesh , Sharma Anand , Gangwar Ravi Kumar 
Published: November 2016

ABSTRACTThis article investigates modified annular ring patch fed cylindrical dielectric resonator antenna (CDRA) with hybrid mode excitation. The present article comprises of two main aims (i) generation of HE11δ and HE12δ mode in CDRA with the support of modified annular ring patch, both the hybrid modes radiates in broadside direction and (ii) achieve triple band characteristics by using the concept of hybrid antenna. The proposed antenna design is functioning in three different frequency bands, i.e. 1.92–2.3 GHz, 3.13–4.6 GHz, and 5.4–6.5 GHz. The simulated outcomes are verified by using archetype of proposed antenna. The practical outcomes indicate good settlement with simulated outcomes. The proposed antenna structure is appropriate for WLAN/WiMAX applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:120–125, 2017
Design and measurements of a terahertz quasi‐optical mixer integrated lens antenna
Authors: Guo Dalu , Li Mingxun , Qiao Haidong , Chen Kunhong , Lv Xin 
Published: November 2016

ABSTRACTThe article propose a quasi‐optical mixer, which could operate from 325 GHz to 350 GHz. A hybrid method is offered that combined FEM and MLFMM algorithm to design and optimize the lens antenna integrated a planar log‐periodic antenna and a Schottky diode. We also give the method for characterizing the conversion loss and noise temperature of the quasi‐optical mixer. The antenna gains at 340 GHz is calculated to be 29 dB from the measured radiation patterns. The measured DSB conversion loss of the mixer could achieve from 10.5 dB to 12.5 dB and the noise temperature is estimated to be lower than 5300 K with an improved measurement method. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:113–116, 2017
A tunable bandpass‐to‐bandstop filter with controllable bandwidth and high rejection level
Authors: Li Run‐Shuo , Chen Fu‐Chang 
Published: November 2016

ABSTRACTA tunable bandpass‐to‐bandstop filter with controllable bandwidth is proposed in this article. The bandpass‐to‐bandstop transformation can be achieved by adjusting the PIN diode, and bandwidth of the bandpass filter can be controlled by adjusting the voltage of varactors, as the coupling coefficients and the external quality factors (Qe) can be tuned by changing the ratios of the loaded capacitances. In the bandpass mode, a tuning range of 805–1032 MHz (24.7%) with return loss better than 11.5 dB can be achieved. In the bandstop mode, a tuning range of 760–1228 MHz (47.1%) can be obtained. The rejection level of the bandstop mode is higher than 40 dB. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:110–113, 2017
A wideband quadrature power splitter covering 81.75% fractional bandwidth in single layer via‐less technology
Authors: Lucarelli Matteo , Maddio Stefano , Collodi Giovanni , Cidronali Alessandro 
Published: November 2016

ABSTRACTA novel 90° wideband quadrature power splitter configuration based on the contemporary use of a large band 3‐dB Wilkinson power divider combined with a 90 degrees Schiffman phase shifter is presented. The proposed approach is consistent with an implementation on a single layer, via‐less, low performance substrate, thus enabling simple fabrication and integration. The proposed solution leads to a balanced power splitting (±1.5 dB), a consistent phase shifting (90°±10°), and a good input matching (S11 ≤ −10 dB) from 2.3 GHz to 5.48 GHz, hence suitable for a wide range of applications, comprising IEEE 802.11 WiFi operation in both S and C band. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:142–145, 2017
A compact broadband dual‐polarized omnidirectional antenna with high isolations for indoor DAS applications
Authors: Yang Zhijian , Jiao Yong‐Chang , Weng Zibin , Zhou Lei 
Published: November 2016

ABSTRACTA compact broadband horizontally/vertically polarized omnidirectional antenna with high isolations is presented for indoor distributed antenna systems. The antenna is a combination of a horizontally polarized (HP) element and a vertically polarized (VP) element, which are connected by four broadside parallel strips (BPSs). Its HP and VP elements consist of four horizontal and vertical elliptical printed dipoles respectively. The vertical dipoles locate between adjacent horizontal dipoles, which makes the antenna compact in structure. The dual‐polarized antenna obtains a bandwidth of 45.5% from 1.7 to 2.7 GHz, and the port isolations are better than 30 dB without introducing large distance between vertical dipoles and horizontal dipoles. The HP and VP gains are higher than 1.7 and 2 dBi respectively. For both horizontal and vertical elements, the radiation patterns in the horizontal plane are omnidirectional with ripples <2.5 dB, and the cross‐polarization levels are also below −25 dB in the horizontal plane. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:176–180, 2017