bluuebunny/crossref_metadata_2025_split huggingface dataset:
THz spatial filter employing bimaterial switching for temperature sensing
Authors: Sanphuang Varittha , Nahar Niru K. , Volakis John L. 
Published: November 2016

ABSTRACTWe propose a THz spatial filter using frequency selective surfaces (FSS) integrated with bimaterial actuator for temperature sensing. The actuator consists of two materials that have different thermal expansion rates and controlled based on temperature tuning. In this paper, we develop reconfigurable filters operating in the THz band that subjected to the temperature gradient of the surrounding medium. The filter was fabricated using gold to create the filter pattern printed on silicon substrate. SiO2 and Al were used as bimaterial actuators. The equivalent circuit was extracted and demonstrated. Measurement and simulation results show good agreement with excellent transmittance (>80%). According to different gap of the actuator (up and down), the peak frequency is varied from 0.36 to 0.34 THz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:168–171, 2017
Stability of coaxial cable transmission and measurement system using optical fiber link technologies
Authors: She Yuanfeng , Ameya Michitaka , Hirose Masanobu , Kurokawa Satoru , Hirokawa Jiro , Ando Makoto 
Published: November 2016

ABSTRACTThis article measured the stability of the transmission of the coaxial cable and introduced a measurement system using the optical fiber link technologies in the millimeter‐wave band. The radiation patterns of two antennas have been measured by the proposed optical fiber link system at 60 GHz. The proposed system is a reliable candidate for the small antenna pattern measurement system in the millimeter wave band. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:201–204, 2017
Investigation of the fiber Bragg grating inscribed in multimode fiber by femtosecond laser
Authors: Jiang Yajun , Yang Dexing , Yuan Yuan , Xu Jian , Li Dong , Wang Meirong , Zhao Jianlin 
Published: November 2016

ABSTRACTMultimode fiber Bragg grating (MFBG) is inscribed in graded‐index multimode fiber using infrared femtosecond laser and phase mask. Multiple dips are observed in the transmission spectrum of MFBG. There is not only self‐coupling effect between the forward and backward principal modes, but also the mutual coupling effect between the neighbor modes. The induced refractive index modulation of 6.4 × 10 −4 is achieved for a peak power density of 4.1 × 1013 W/cm2 without any fiber sensitization. Thermal experiment results show that the MFBG belongs to type I grating. The transmission spectrum of MFBG shifts linearly with the strain and pressure at sensitivities of 1.27 ± 0.002 pm/με and −3.3 ± 0.06 pm/MPa, respectively. The MFBGs are expected to be used for multichannel filters, multiwavelength fiber lasers, and multiparameter sensing. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:214–219, 2017
Flexible and wearable 2.45 GHz CPW‐fed antenna using inkjet‐printing of silver nanoparticles on pet substrate
Authors: Guo Xiaohui , Hang Ying , Xie Zhicheng , Wu Can , Gao Le , Liu Caixia 
Published: November 2016

ABSTRACTThis article demonstrated a fully printed CPW‐fed antenna based on silver‐nanoparticles for ISM that is flexible, wearable, and reversibly deformable. The proposed antenna consists of nano‐silver ink, a conducting material used as a radiating patch and ground planes printed on the polyethylene terephthalate flexible substrate. The fully printed antenna was fabricated and the radiating properties were investigated. The simulated and measured reflection coefficients are ∼−31 dB and ∼−23 dB, respectively. Meanwhile, the −10 dB bandwidth is ∼530 MHz and the obtained VSWR is ∼1.3. Radiating properties were characterized and agree well with the simulation results. The material and fabrication technique illustrated here could be extended to achieve other types of flexible antenna with more complex patterns for wearable electronics applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:204–208, 2017
Ultrawideband circularly polarized monopole antenna for millimeter‐wave applications
Authors: Elsheakh Dalia M. , Abdallah Esmat A. 
Published: November 2016

ABSTRACTThis letter describes the design, and measurement of an ultrawideband (UWB) circularly polarized monopole antenna for millimeter‐wave short range wireless communications applications. This antenna is comprised elliptical loop monopole antenna with modified ground plane and connected by via to another loop on the other substrate side and coupled with small loop to create UWB without discontinuity bands. The −10 dB impedance bandwidth of the antenna provides 85 GHz which extended from 15 to 100 GHz. Moreover, multiband circularly polarized antenna provides 3 dB axial ratio (AR) bandwidth extends from 20 to 30 GHz, from 35 to 45 GHz and from 55 to 75 GHz. The average gain is around 4.5 dBi while the average radiation efficiency is 80% with 15% reduction as compared to original antenna size. The compact size and simple feed structure of the designed antenna make it a low cost solution for the integrated millimeter‐wave applications for wireless communications. The antenna with and without via are fabricated and measured to show the effect of via. The HFSS, FEM‐based 3D full wave electromagnetic solver simulator from Ansys is used for the design of the proposed antennas. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:189–194, 2017
Circulating adipocyte‐derived exosomal MicroRNAs associated with decreased insulin resistance after gastric bypass
Authors: Hubal Monica J. , Nadler Evan P. , Ferrante Sarah C. , Barberio Matthew D. , Suh Jung‐Hyuk , Wang Justin , Dohm G. Lynis , Pories Walter J. , Mietus‐Snyder Michelle , Freishtat Robert J. 
Published: November 2016

ObjectiveExosomes from obese adipose contain dysregulated microRNAs linked to insulin signaling, as compared with lean controls, providing a direct connection between adiposity and insulin resistance. This study tested the hypotheses that gastric bypass surgery and its subsequent weight loss would normalize adipocyte‐derived exosomal microRNAs associated with insulin signaling and the associated metabolome related to glucose homeostasis.MethodsAfrican American female subjects with obesity (N = 6; age: 38.5 ± 6.8 years; BMI: 51.2 ± 8.8 kg/m2) were tested before and 1 year after surgery. Insulin resistance (HOMA), serum metabolomics, and global microRNA profiles of circulating adipocyte‐derived exosomes were evaluated via ANCOVA and correlational analyses.ResultsOne year postsurgery, patients showed decreased BMI (−18.6 ± 5.1 kg/m2; P < 0.001), ameliorated insulin resistance (HOMA: 1.94 ± 0.6 presurgery, 0.49 ± 0.1 postsurgery; P < 0.001), and altered metabolites including branched chain amino acids (BCAA). Biological pathway analysis of predicted mRNA targets of 168 surgery‐responsive microRNAs (P < 0.05) identified the insulin signaling pathway (P = 1.27E−10; 52/138 elements), among others, in the data set. The insulin signaling pathway was also a target of 10 microRNAs correlated to changes in HOMA (P < 0.05; r > 0.4), and 48 microRNAs correlated to changes in BCAA levels.ConclusionsThese data indicate that circulating adipocyte‐derived exosomes are modified following gastric bypass surgery and correlate to improved postsurgery insulin resistance.
Aqueous solution‐processed NiOx anode buffer layers applicable for polymer solar cells
Authors: Yang Weitao , Yu Zhikai , Liu Wenqing , Li Chang‐Zhi , Chen Hongzheng 
Published: November 2016

ABSTRACTA green and facile method has been developed for the room temperature and aqueous solution preparation of NiOx film as anode buffer layers for polymer solar cells (PSCs). The NiOx buffer layer is prepared simply by spin‐coating nickel acetylacetonate precursor‐based aqueous solution onto ITO substrate at room temperature in air. UV‐ozone post‐treatment promotes the formation of dipolar NiOOH species on the film surface, resulting in the anode buffer layer with suitable work function. PSCs have been fabricated with the device structure of ITO/NiOx/photoactive layer/PFN/Al. The power conversion efficiencies of the PSCs based on PTB7:PC71BM blends (8.43%) and P3HT:PC71BM blends (3.04%) with NiOx anode buffer layer are comparable to those with the commonly used PEDOT:PSS anode buffer layer. In addition, the devices made with NiOx buffer layer exhibit much better air stability than those with PEDOT:PSS. These results indicate that the water solution processed NiOx film at room temperature in air is a promising anode buffer layer for efficient and stable PSCs. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 747–753
Quick water‐responsive shape memory hybrids with cellulose nanofibers
Authors: Tan Lin , Hu Jinlian , Ying Rena Koo , Zhu Yong , Liu Pengqing 
Published: November 2016

ABSTRACTA type of quick water‐responsive shape memory hybrids is fabricated by introducing cellulose nanofibrous mats as the filler in a polymeric matrix. Cellulose nanofibrous mats are obtained through hydrolyzing electrospun cellulose acetate (CA) nanofibers, then casted in thermoplastic polyurethane (TPU) solution to form the hybrids. The quick shape memory behavior of the formed hybrids is demonstrated using dynamic mechanical analysis (DMA) and stress–strain cyclic test. According to a predetermined protocol, the hybrids present desirable shape fixation and recovery, and the elastic modulus (E′) is shown to be responsive promptly and reversibly against drying and wetting cycle. Shape memory mechanism of the hybrids involves the reversible and competitive hydrogen bonds within cellulose before and after water immersion as well as the entropy elasticity of the TPU matrix. This study can pave a way to design novel smart materials by facile methods through incorporating natural nanomaterials as water sensitive fillers. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 767–775
Thermo‐stable 2‐(arylimino)benzylidene‐9‐arylimino‐5,6,7,8‐tetrahydro cyclohepta[b]pyridyliron(II) precatalysts toward ethylene polymerization and highly linear polyethylenes
Authors: Zhang Youfu , Suo Hongyi , Huang Fang , Liang Tongling , Hu Xinquan , Sun Wen‐Hua 
Published: November 2016

ABSTRACTA series of 2‐(arylimino)benzylidene‐9‐arylimino‐5,6,7,8‐tetrahydrocyclohepta[b]pyridyliron(II) chlorides was synthesized and characterized using FT‐IR and elemental analysis, and the molecular structures of complexes Fe3 and Fe4 have been confirmed by the single‐crystal X‐ray diffraction as a pseudo‐square‐pyramidal or distorted trigonal‐bipyramidal geometry around the iron core. On activation with methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all iron precatalysts exhibited high activities toward ethylene polymerization with a marvelous thermo‐stability and long lifetime. The Fe4/MAO system showed highest activity of 1.56 × 107 gPE·mol−1(Fe)·h−1 at 70 °C, which is one of the highest activities toward ethylene polymerization by iron precatalysts. Even up to 80 °C, Fe3/MAO system still persist high activity as 6.87 × 106 g(PE)·mol−1(Fe)·h−1, demonstrating remarkable thermal stability for industrial polymerizations (80–100 °C). This was mainly attributing to the phenyl modification of the framework of the iron precatalysts. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 830–842
Novel biomarkers of nasopharyngeal carcinoma metastasis risk identified by reverse phase protein array based tumor profiling with consideration of plasma Epstein–Barr virus DNA load
Authors: Xu Tao , Su Bojin , Huang Peiyu , Wei Weihong , Deng Yanming , Sehgal Vasudha , Wang Donghui , Jiang Jun , Zhang Guoyi , Li Anfei , Yang Huiling , Claret Francois X. 
Published: November 2016

PurposeIn patients with Epstein–Barr virus (EBV) associated nasopharyngeal carcinoma (NPC), intertumor heterogeneity causes interpatient heterogeneity in the risk of distant metastasis. We aimed to identify novel biomarkers of metastasis risk using reverse phase protein array (RPPA) profiling of NPC patients at risk for metastasis and considering plasma EBV DNA load.Experimental designA total of 98 patients with NPC with and without metastasis after treatment, matched with respect to clinical parameters, are enrolled. Total protein expression is measured by RPPA, and protein functions are analyzed by pathway bioinformatics.ResultsThe RPPA analysis revealed a profile of 70 proteins that are differentially expressed in metastatic and nonmetastatic tumors. Plasma EBV DNA load after treatment correlated with protein expression level better than plasma EBV DNA load before treatment did. The biomarkers of NPC metastasis identified by proteomics regulate signaling pathways involved in cell cycle progression, apoptosis, and epithelial‐mesenchymal transition. The authors identified 26 biomarkers associated with 5‐year distant failure‐free survival in univariate analysis; five biomarkers remained significant in multivariate analysis.Conclusions and clinical relevanceA comprehensive RPPA profiling study is warranted to identify novel metastasis‐related biomarkers and further examine the activation state of signaling proteins to improve estimation of metastasis risk for patients with EBV‐associated NPC.
Fabrication of InGaN/GaN MQW nano‐LEDs by hydrogen‐environment anisotropic thermal etching
Authors: Ogawa Kohei , Hachiya Ryo , Mizutani Tomoya , Ishijima Shun , Kikuchi Akihiko 
Published: November 2016

III‐nitride semiconductor nanostructures are attractive materials for the realization of high‐performance and highly functional optoelectronic devices. In this study, we fabricated InGaN/GaN multiple quantum well (MQW) nanostructured light‐emitting diodes (nano‐LEDs) using hydrogen‐environment anisotropic thermal etching (HEATE). HEATE is a low‐damage anisotropic etching technique that is based on the thermal decomposition of (In)GaN under a low‐pressure hydrogen environment. The InGaN/GaN MQW nano‐LEDs showed good rectification characteristics and blue emission without any post treatment to remove all etching damage. The narrowest MQW lateral sizes of successfully fabricated nanowall and nanopillar LEDs were 87 and 70 nm, respectively. These LEDs are among the smallest InGaN/GaN‐based nano‐LEDs fabricated via a top–down process.Electroluminescence images of InGaN/GaN nano‐LEDs operated at 3 V. (a) An a‐axis honeycomb nanowall, (b) an m‐axis nanowall array, (c) an a‐axis nanowall array, and (d) a nanopillar array.
Cross‐border mergers and acquisitions: The role of private equity firms
Authors: Humphery‐Jenner Mark , Sautner Zacharias , Suchard Jo‐Ann 
Published: November 2016

Research summary: We show that private equity ownership (“PE backing”) of the acquirer is a signal of deal quality in cross‐border takeovers. As such, PE‐backed acquirers experience higher announcement returns in cross‐border takeovers, but only if targets are in poor information environments. We show that PE backing is a positive market signal because of PE firms' experience and networks that result from prior deals in target countries. We document that the market correctly anticipates that operating performance of PE‐backed acquirers increases as a result of cross‐border mergers and acquisitions (M&A).Managerial summary: We study cross‐border acquisitions by acquirers that are partially owned by private equity firms (“PE backing”). Cross‐border acquisitions are challenging as acquirers often have little information about targets. We document that investors react positively to cross‐border deals of PE‐backed acquirers—their stock prices increase upon deal announcements. However, this is only the case if targets are in countries with poor information environments. This is because PE backing allows acquirers to access PE firms' deal experience and networks. This makes it easier to identify and evaluate good targets, making it more (less) likely that a deal eventually creates (destroys) value. Consistent with this, we find that earnings of PE‐backed acquirers increase after buying targets in poor information environments. Copyright © 2016 John Wiley & Sons, Ltd.
Treatment of Severe Adult Traumatic Brain Injury Using Bone Marrow Mononuclear Cells
Authors: Cox Charles S. , Hetz Robert A. , Liao George P. , Aertker Benjamin M. , Ewing-Cobbs Linda , Juranek Jenifer , Savitz Sean I. , Jackson Margaret L. , Romanowska-Pawliczek Anna M. , Triolo Fabio , Dash Pramod K. , Pedroza Claudia , Lee Dean A. , Worth Laura , Aisiku Imoigele P. , Choi Huimahn A. , Holcomb John B. , Kitagawa Ryan S. 
Published: November 2016

AbstractPreclinical studies using bone marrow derived cells to treat traumatic brain injury have demonstrated efficacy in terms of blood–brain barrier preservation, neurogenesis, and functional outcomes. Phase 1 clinical trials using bone marrow mononuclear cells infused intravenously in children with severe traumatic brain injury demonstrated safety and potentially a central nervous system structural preservation treatment effect. This study sought to confirm the safety, logistic feasibility, and potential treatment effect size of structural preservation/inflammatory biomarker mitigation in adults to guide Phase 2 clinical trial design. Adults with severe traumatic brain injury (Glasgow Coma Scale 5–8) and without signs of irreversible brain injury were evaluated for entry into the trial. A dose escalation format was performed in 25 patients: 5 controls, followed 5 patients in each dosing cohort (6, 9, 12 ×106 cells/kg body weight), then 5 more controls. Bone marrow harvest, cell processing to isolate the mononuclear fraction, and re-infusion occurred within 48 hours after injury. Patients were monitored for harvest-related hemodynamic changes, infusional toxicity, and adverse events. Outcome measures included magnetic resonance imaging-based measurements of supratentorial and corpus callosal volumes as well as diffusion tensor imaging-based measurements of fractional anisotropy and mean diffusivity of the corpus callosum and the corticospinal tract at the level of the brainstem at 1 month and 6 months postinjury. Functional and neurocognitive outcomes were measured and correlated with imaging data. Inflammatory cytokine arrays were measured in the plasma pretreatment, posttreatment, and at 1 and 6 month follow-up. There were no serious adverse events. There was a mild pulmonary toxicity of the highest dose that was not clinically significant. Despite the treatment group having greater injury severity, there was structural preservation of critical regions of interest that correlated with functional outcomes. Key inflammatory cytokines were downregulated. Treatment of severe, adult traumatic brain injury using an intravenously delivered autologous bone marrow mononuclear cell infusion is safe and logistically feasible. There appears to be a treatment signal as evidenced by central nervous system structural preservation, consistent with previous pediatric trial data. Inflammatory biomarkers are downregulated after cell infusion.Video Highlight: https://youtu.be/UiCCPIe-IaQ Stem Cells 2017;35:1065–1079
The impact of round window vs cochleostomy surgical approaches on interscalar excursions in the cochlea: Preliminary results from a flat‐panel computed tomography study
Authors: Jiam Nicole T. , Limb Charles J. 
Published: November 2016

AbstractObjectiveTo evaluate incidence of interscalar excursions between round window (RW) and cochleostomy approaches for cochlear implant (CI) insertion.MethodsThis was a retrospective case‐comparison. Flat‐panel CT (FPCT) scans for 8 CI users with Med‐El standard length electrode arrays were collected. Surgical technique was identified by a combination of operative notes and FPCT imaging. Four cochleae underwent round window insertion and 4 cochleae underwent cochleostomy approaches anterior and inferior to the round window.ResultsIn our pilot study, cochleostomy approaches were associated with a higher likelihood of interscalar excursion. Within the cochleostomy group, we found 29% of electrode contacts (14 of 48 electrodes) to be outside the scala tympani. On the other hand, 8.5% of the electrode contacts (4 of 47 electrodes) in the round window insertion group were extra‐scalar to the scala tympani. These displacements occurred at a mean angle of occurrence of 364° ± 133°, near the apex of the cochlea. Round window electrode displacements tend to localize at angle of occurrences of 400° or greater. Cochleostomy electrodes occurred at an angle of occurrence of 19°–490°.ConclusionsCurrently, the optimal surgical approach for standard CI electrode insertion is highly debated, to a certain extent due to a lack of post‐operative assessment of intracochlear electrode contact. Based on our preliminary findings, cochleostomy approach is associated with an increased likelihood of interscalar excursions, and these findings should be further evaluated with future prospective studies.
Temporal and spectral contributions to musical instrument identification and discrimination among cochlear implant users
Authors: Prentiss Sandra M. , Friedland David R. , Fullmer Tanner , Crane Alison , Stoddard Timothy , Runge Christina L. 
Published: November 2016

AbstractObjectiveTo investigate the contributions of envelope and fine‐structure to the perception of timbre by cochlear implant (CI) users as compared to normal hearing (NH) listeners.MethodsThis was a prospective cohort comparison study. Normal hearing and cochlear implant patients were tested. Three experiments were performed in sound field using musical notes altered to affect the characteristic pitch of an instrument and the acoustic envelope. Experiment 1 assessed the ability to identify the instrument playing each note, while experiments 2 and 3 assessed the ability to discriminate the different stimuli.ResultsNormal hearing subjects performed better than CI subjects in all instrument identification tasks, reaching statistical significance for 4 of 5 stimulus conditions. Within the CI population, acoustic envelope modifications did not significantly affect instrument identification or discrimination. With envelope and pitch cues removed, fine structure discrimination performance was similar between normal hearing and CI users for the majority of conditions, but some specific instrument comparisons were significantly more challenging for CI users.ConclusionsCochlear implant users perform significantly worse than normal hearing listeners on tasks of instrument identification. However, cochlear implant listeners can discriminate differences in envelope and some fine structure components of musical instrument sounds as well as normal hearing listeners. The results indicated that certain fine structure cues are important for cochlear implant users to make discrimination judgments, and therefore may affect interpretation toward associating with a specific instrument for identification.