bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simplified fiber Bragg grating‐based temperature measurement system design with enhanced high signal‐to‐noise ratio
Authors: Yucel Muret , Torun M. 
Published: March 2018

AbstractIn this study, a temperature measurement was performed by determining the linear slope in the transmission spectrum of fiber Bragg grating (FBG) and by designing a temperature measurement system with the density fluctuation of a stationary continuous wave (CW) laser light on this line. The measuring range, which may change depending on the transmission spectrum of the FBG, was determined to be 12°C for this study and measurements were performed with 0.06°C accuracy. Gaussian fitting with negligible time loss and high noise immunity increased the signal‐to‐noise ratio (SNR) ratio to 37.5 dB. A simple, cost‐ efficient, high‐speed, and high SNR, ergonomic, compact temperature measurement system was created with the suggested slope technique and by using a very limited number of fiber optic components.
A leaf‐shaped CPW‐fed UWB antenna for GPR applications
Authors: Kundu Surajit , Jana Sanjay Kumar 
Published: March 2018

AbstractA new co‐planar waveguide fed UWB antenna with transitions in feed line is proposed in this article. A good agreement is found in between simulated and measured results of the proposed design. The antenna provides a bandwidth improvement of more than 120% with min. group delay variation, high efficiency of 88%, and gain variation of 2–5 dBi. The antenna pattern is omnidirectional in H‐plane and monopole like in E‐plane. The proposed antenna is also tested in close proximity of soil to establish its ability for GPR applications.
A 40 GHz on‐chip power combine load for mm‐wave power amplifier
Authors: Lin Jiafu , Zhang Gary , Boon Chirn Chye 
Published: March 2018

AbstractMillimeter‐wave (Mm‐Wave) communication have been considered as one of the most potential candidate of the 5th generation communication (5G). However, the low breakdown voltage of CMOS challenges RF circuits design in various aspects especially for power amplifier (PA). The maximum available power from an unit transistor is limited by device characteristic thus power combining methods have been extensively investigated. This paper presents an on‐chip power combine load that can provide impedance transformation together with power combining for Mm‐Wave CMOS PA. A two‐way λ/6 power combine load has been implemented at 40 GHz on 0.18 µm CMOS technology, the measured return loss of each port is better than 15 dB and the loss is lower than 1.5 dB while isolation is better than 20 dB with a compact size (0.08 mm2).
Compact 4 element Sierpinski Knopp fractal UWB MIMO antenna with dual band notch
Authors: Rajkumar S. , Selvan Krishnasamy T. , Rao P.H. 
Published: March 2018

AbstractIn this communication, a 4 element ultra‐wide band (UWB) multiple‐input multiple‐output (MIMO) antenna is presented. The total size of the proposed antenna is 40 × 40 mm2. A novel Sierpinski Knopp fractal geometry is used in the antenna radiator design to accomplish miniaturization. The antenna elements are placed orthogonal to each other. The spacing between any pair of elements is 0.11 λ (λ being the free space wavelength at 7.15 GHz). A CSRR shape like slot is etched on the radiating element to achieve dual band notch characteristics at WiMax 3.5 GHz and WLAN 5.4 GHz regions. The proposed antenna operates from 2.6 to 10.6 GHz, exhibiting a reflection coefficient S11 < −10 dB and an isolation better than 20 dB. The MIMO antenna does not require any additional structure to improve isolation. Envelope correlation coefficient (ECC) and capacity loss (CL) are calculated to evaluate the diversity performance of the proposed antenna. The measured values exhibit better match with the simulated results.
Design and analysis of a novel dual trapezoidal slot‐based rectangular microstrip antenna for wide area network using WiMax application
Authors: Raviteja G. Viswanadh 
Published: March 2018

AbstractIn this article, a novel microstrip rectangular patch antenna is designed which involves dual trapezoidal slots. The proposed microstrip patch antenna is used in the S band range of 2–4 GHz, used for various wireless applications. The resonant frequency is calculated theoretically at 3.5 GHz with patch dimensions being 25.4 mm × 19.4 mm in terms of width × length (in mm). Using the theoretical parameters, the proposed patch antenna is designed using HFSS software. The results are also compared to the conventional regular patch antenna. The results show that the proposed patch antenna with dual trapezoidal slot has better return loss and VSWR and can be used for WiMax application services. The observations and findings are tabulated.
Stratified spherical model for microwave imaging of the brain: Analysis and experimental validation of transmitted power
Authors: Bjelogrlic Mina , Volery Maxime , Fuchs Benjamin , Thiran Jean‐Philippe , Mosig Juan R. , Mattes Michael 
Published: March 2018

AbstractThis work presents the analysis of power transmission of a radiating field inside the human head for microwave imaging applications. For this purpose, a spherical layered model composed of dispersive biological tissues is investigated in the range of (0.5–4) GHz and is confronted to experimental verification.
CEST‐MRI studies of cells loaded with lanthanide shift reagents
Authors: Ferrauto Giuseppe , Di Gregorio Enza , Delli Castelli Daniela , Aime Silvio 
Published: March 2018

PurposeMagnetic resonance imaging has been used extensively to track in vivo implanted cells that have been previously labeled with relaxation enhancers. However, this approach is not suitable to track multiple cell populations, as it may lead to confounding results in case the contrast agent is released from the labeled cells. This paper demonstrates how the use of CEST agents can overcome these issues. After encapsulating paramagnetic lanthanide shift reagents, we may shift the absorption frequency of the intracellular water resonance (δIn), thus generating frequency‐encoding CEST responsive cells that can be visualized in the MR image by applying the proper RF irradiation.MethodsEu‐HPDO3A, Dy‐HPDO3A, and Tm‐HPDO3A were used as shift reagents for labeling murine breast cancer cells and murine macrophages by hypotonic swelling and pinocytosis. The CEST‐MR images were acquired at 7 T, and the saturation transfer effect was measured. Samples at different dilution of cells were analyzed to quantify the detection threshold. In vitro experiments of cell proliferation were carried out. Finally, murine breast cancer cells were injected subcutaneously in mice, and MR images were acquired to assess the proliferation index in vivo.ResultsIt was found that entrapment of the paramagnetic complexes into endosomes (i.e., using the pinocytosis route) leads to an enhanced shift of the intracellular water resonance. δIn appears to be proportional to the effective magnetic moment (μeff) and to the concentration of the loaded lanthanide complex. Moreover, a higher shift is present when the complexes are entrapped in the endosomes. The cell proliferation index was assessed both in vitro and in vivo by evaluating the reduction of δIn value in the days after the cell labeling.ConclusionCells can be visualized by CEST MRI after loading with paramagnetic shift reagent, by exploiting the large ensemble of the properly shifted intracellular water molecules. A better performance is obtained when the complexes are entrapped inside the endosomes. The observed (δIn) value is strongly correlated to the chemical nature of the probe, and to its concentration and cellular localization. Two applications of this method are reported in this paper: (1) for in vivo cell visualization and (2) for the monitoring of the cellular proliferation process, as this method is accompanied by a change in δIn that may be exploited as a longitudinal reporter of the proliferation rate.
Hybrid hyper‐reduced modeling for contact mechanics problems
Authors: Fauque J. , Ramière I. , Ryckelynck D. 
Published: March 2018

SummaryThe model reduction of mechanical problems involving contact remains an important issue in computational solid mechanics. In this article, we propose an extension of the hyper‐reduction method based on a reduced integration domain to frictionless contact problems written by a mixed formulation. As the potential contact zone is naturally reduced through the reduced mesh involved in hyper‐reduced equations, the dual reduced basis is chosen as the restriction of the dual full‐order model basis. We then obtain a hybrid hyper‐reduced model combining empirical modes for primal variables with finite element approximation for dual variables. If necessary, the inf‐sup condition of this hybrid saddle‐point problem can be enforced by extending the hybrid approximation to the primal variables. This leads to a hybrid hyper‐reduced/full‐order model strategy. This way, a better approximation on the potential contact zone is further obtained. A posttreatment dedicated to the reconstruction of the contact forces on the whole domain is introduced. In order to optimize the offline construction of the primal reduced basis, an efficient error indicator is coupled to a greedy sampling algorithm. The proposed hybrid hyper‐reduction strategy is successfully applied to a 1‐dimensional static obstacle problem with a 2‐dimensional parameter space and to a 3‐dimensional contact problem between two linearly elastic bodies. The numerical results show the efficiency of the reduction technique, especially the good approximation of the contact forces compared with other methods.
Manufacturing Nanoparticles with Orthogonally Adjustable Dispersibility in Hydrocarbons, Fluorocarbons, and Water
Authors: Zeininger Lukas , Stiegler Lisa M. S. , Portilla Luis , Halik Marcus , Hirsch Andreas 
Published: March 2018

AbstractInvited for this month's cover picture is the group of Prof. Dr. Andreas Hirsch from Friedrich Alexander University (Germany). The cover picture shows shell‐by‐shell coated nanoparticle ‘chameleons’—wet‐chemically surface‐modified nanoparticles that can reversibly adjust their dispersibility to entirely orthogonal solvent environments. Read the full text of their Full Paper at 10.1002/open.201800011.
Utilization of drugs with pregnancy exposure registries during pregnancy
Authors: Illoh Onyekachukwu A. , Toh Sengwee , Andrade Susan E. , Hampp Christian , Sahin Leyla , Gelperin Kate , Taylor Lockwood , Bird Steven T. 
Published: March 2018

AbstractPurposeTo describe the utilization of drugs with pregnancy exposure registries by trimester during pregnancy, in comparison with matched nonpregnant episodes and a pre‐pregnancy period.MethodsWe identified live‐born deliveries from women aged 10 to 54 years and matched the pregnancies 1:1 with nonpregnant episodes from a comparator cohort not delivering live‐born infants, using data from 2001 to 2013 in the Sentinel Distributed Database. We evaluated the utilization of 34 drugs with pregnancy exposure registries, comparing utilization during pregnancy to the matched nonpregnant episodes, and to the 90 days before pregnancy.ResultsWe identified 1 895 597 pregnancies ending in live births in 1 598 697 women and 1 895 597 matched nonpregnant episodes in 1 582 581 women. We observed a lower prevalence of use for most drugs during pregnancy compared with the matched nonpregnant episodes, and the 90‐day pre‐pregnancy period. The median (interquartile range) prevalence ratio of use, at any time during pregnancy, for all products was 0.2 (0.1‐0.3) comparing pregnant to nonpregnant episodes. Overall, there was a decrease in drug utilization by trimester; from 2.6% in the 90 days preceding pregnancy to 2.1% in the first trimester, 1.1% in the second trimester, and 0.9% in the third trimester.ConclusionsAmong drugs with pregnancy exposure registries, use was less during pregnancy compared with before pregnancy and to the matched nonpregnant episodes. The lower utilization during pregnancy suggests that women may be avoiding these drugs to minimize potentially harmful exposure during pregnancy. This lower utilization may increase the challenges of further studying the safety of these drugs using pregnancy exposure registries.
Salt concentration dependence of the mechanical properties of LiPF6/poly(propylene glycol) acrylate electrolyte at a graphitic carbon interface: A reactive molecular dynamics study
Authors: Verners Osvalds , Lyulin Alexey V. , Simone Angelo 
Published: March 2018

ABSTRACTThis reactive molecular dynamics study explores the salt concentration dependence of the viscoelastic and mechanical failure properties of a poly(propylene glycol)/LiPF6‐based solid polymer electrolyte (SPE) at a graphitic carbon electrode interface. To account for the finite‐size effect of interface‐confined SPE films, the properties of two distinct film thicknesses are compared with the respective bulk properties. Additionally, the effect of uniaxial compression in the interface‐normal direction on free energy profiles of Li‐ion SPE‐desolvation is studied. © 2018 The Authors. Journal of Polymer Science Part B: Polymer Physics Published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 718–730
Isolation and identification of floral attractants from a nectar plant for the dried bean beetle, Acanthoscelides obtectus (Coleoptera: Chrysomelidae, Bruchinae)
Authors: Vuts József , Woodcock Christine M , Caulfield John C , Powers Stephen J , Pickett John A , Birkett Michael A 
Published: March 2018

AbstractBACKGROUNDThe response of virgin females of the legume pest Acanthoscelides obtectus (Coleoptera: Bruchidae) to headspace extracts of volatiles collected from flowers of a nectar plant, Daucus carota, was investigated using behaviour (four‐arm olfactometry) and coupled gas chromatography–electroantennography (GC‐EAG).RESULTSOdours from inflorescences were significantly more attractive to virgin female beetles than clean air. Similarly, a sample of volatile organic compounds (VOCs) collected by air entrainment (dynamic headspace collection) was more attractive to beetles than a solvent control. In coupled GC‐EAG experiments with beetle antennae and the VOC extract, six components showed EAG activity. Using coupled GC–mass spectrometry (GC–MS) and GC peak enhancement with authentic standards, the components were identified as α‐pinene (S:R 16:1), sabinene, myrcene, limonene (S:R 1:3), terpinolene and (S)‐bornyl acetate. Females preferred the synthetic blend of D. carota EAG‐active volatiles to the solvent control in bioassays. When compared directly, odours of D. carota inflorescences elicited stronger positive behaviour than the synthetic blend.CONCLUSIONThis is the first report of behaviourally active volatiles linked to pollen location for A. obtectus, and development of the six‐component blend is being pursued, which could underpin the design of semiochemical‐based field management approaches against this major pest of stored products. © 2018 Society of Chemical Industry
Adaptive control charts for skew‐normal distribution
Authors: Chiang Jyun‐You , Tsai Tzong‐Ru , Su Nan‐Cheng 
Published: March 2018

AbstractThe standard Shewhart‐type
chart, named FSS‐
chart, has been widely used to detect the mean shift of process by implementing fixed sample and sampling frequency schemes. The FSS‐
chart could be sensitive to the normality assumption and is inefficient to catch small or moderate shifts in the process mean. To monitor nonnormally distributed variables, Li et al [Commun Stat‐Theory Meth. 2014; 43(23):4908‐4924] extended the study of Tsai [Int J Reliab Qual Saf Eng. 2007; 14(1):49‐63] to provide a new skew‐normal FSS‐
(SN FSS‐
) chart with exact control limits for the SN distribution. To enhance the sensitivity of the SN FSS‐
chart on detecting small or moderate mean shifts in the process, adaptive
charts with variable sampling interval (VSI), variable sample size (VSS), and variable sample size and sampling interval (VSSI) are introduced for the SN distribution in this study. The proposed adaptive control charts include the normality adaptive charts as special cases. Simulation results show that all the proposed SN VSI‐
, SN VSS‐
, and SN VSSI‐
charts outperform the SN FSS‐
chart on detecting small or moderate shifts in the process mean. The impact of model misspecification on using the proposed adaptive charts and the sample size impact for using the FSS‐
chart to monitor the mean of SN data are also discussed. An example about single hue value in polarizer manufacturing process is used to illustrate the applications of the proposed adaptive charts.
Development on a magnetic anchoring robot system based on visual servo control for laparoendoscopic single‐site surgery
Authors: Feng Haibo , Lu Yu , Chen Dong , Ma Tengfei , Fu Yili 
Published: March 2018

AbstractBackgroundSurgical robot systems have been used in laparoendoscopic single‐site surgery (LESS) to improve patient outcomes. A magnetic anchoring surgical robot system for LESS can effectively extend the operation space.MethodsA robot system based on visual servo control for LESS is proposed. It includes a magnetic anchoring robot and a control subsystem, in which an uncalibrated visual servo control method obtains an accurate positioning capability of the robot for LESS.ResultsThe results of the simulation and the tissue experiment show that the robot system can successfully accomplish the expected control functionalities for LESS. The average positioning error of the proposed system is 1.622 mm.ConclusionThe magnetic anchoring robot system is able to implement the autonomous positioning of its end‐effector through the proposed control approach according to experimental results.
Microdissection testicular sperm extraction in five Japanese patients with non‐mosaic Klinefelter's syndrome
Authors: Chihara Makoto , Ogi Kanna , Ishiguro Tatsuya , Yoshida Kunihiko , Godo Chikako , Takakuwa Koichi , Enomoto Takayuki 
Published: March 2018

AbstractCasesMicrodissection testicular sperm extraction (micro‐TESE) was performed on five Japanese men with non‐mosaic Klinefelter's syndrome (KS) and non‐obstructive azoospermia in the authors' department. Here is reported the operative results and partner's clinical course for two cases where spermatozoa could be acquired. Also encountered was a man with non‐mosaic KS with the partial deletion of azoospermia factor (AZF)b. Because this is rare, it is reported in detail in the context of the previous literature. This case series describes the first experience of micro‐TESE by gynecologists in the current department.OutcomeThe egg collection date was adjusted to the micro‐TESE day by using the modified ultra‐long method. Intracytoplasmic sperm injection (ICSI) was implemented for two men whose spermatozoa were acquired by micro‐TESE, with these progressing to the blastocyst stage. Subsequently, one case conceived after the transfer of fresh embryos and a healthy baby was delivered. However, spermatozoa could not be retrieved from the man with non‐mosaic KS who was harboring the partial deletion of AZFb.ConclusionThese findings suggest that ovulation induction by using the modified ultra‐long method with micro‐TESE and ICSI on the same day represents an effective treatment option for men with non‐mosaic KS. As there are cases where AZF deletion is recognized among patients with non‐mosaic KS, screening before micro‐TESE is strongly recommended.
Robust exponential stability of uncertain stochastic systems with probabilistic time‐varying delays
Authors: Hu Zhipei , Deng Feiqi , Shi Peng , Luo Shixian , Xing Mali 
Published: March 2018

SummaryThis paper is concerned with the problem of delay‐distribution–dependent robust exponential stability for uncertain stochastic systems with probabilistic time‐varying delays. Firstly, inspired by a class of networked systems with quantization and packet losses, we study the stabilization problem for a class of network‐based uncertain stochastic systems with probabilistic time‐varying delays. Secondly, an equivalent model of the resulting closed‐loop network‐based uncertain stochastic system is constructed. Different from the previous works, the proposed equivalent system model enables the controller design of the network‐based uncertain stochastic systems to enjoy the advantage of probability distribution characteristic of packet losses. Thirdly, by applying the Lyapunov‐Krasovskii functional approach and the stochastic stability theory, delay‐distribution–dependent robust exponential mean‐square stability criteria are derived, and the sufficient conditions for the design of the delay‐distribution–dependent controller are then proposed to guarantee the stability of the resulting system. Finally, a case study is given to show the effectiveness of the results derived. Moreover, the allowable upper bound of consecutive packet losses will be larger in the case that the probability distribution characteristic of packet losses is taken into consideration.
Catalytically Active Bacterial Nanocellulose‐Based Ultrafiltration Membrane
Authors: Xu Ting , Jiang Qisheng , Ghim Deoukchen , Liu Keng‐Ku , Sun Hongcheng , Derami Hamed Gholami , Wang Zheyu , Tadepalli Sirimuvva , Jun Young‐Shin , Zhang Qinghua , Singamaneni Srikanth 
Published: March 2018

AbstractLarge quantities of highly toxic organic dyes in industrial wastewater is a persistent challenge in wastewater treatment processes. Here, for highly efficient wastewater treatment, a novel membrane based on bacterial nanocellulose (BNC) loaded with graphene oxide (GO) and palladium (Pd) nanoparticles is demonstrated. This Pd/GO/BNC membrane is realized through the in situ incorporation of GO flakes into BNC matrix during its growth followed by the in situ formation of palladium nanoparticles. The Pd/GO/BNC membrane exhibits highly efficient methylene orange (MO) degradation during filtration (up to 99.3% over a wide range of MO concentrations, pH, and multiple cycles of reuse). Multiple contaminants (a cocktail of 4‐nitrophenol, methylene blue, and rhodamine 6G) can also be effectively treated by Pd/GO/BNC membrane simultaneously during filtration. Furthermore, the Pd/GO/BNC membrane demonstrates stable flux (33.1 L m−2 h−1) under 58 psi over long duration. The novel and robust membrane demonstrated here is highly scalable and holds a great promise for wastewater treatment.
New 2D Carbon Nitride Organic Materials Synthesis with Huge‐Application Prospects in CN Photocatalyst
Authors: Zhao Gang , Cheng Yanling , Wu Yongzhong , Xu Xijin , Hao Xiaopeng 
Published: March 2018

AbstractIn recent years, 2D materials are attracting increased attention because of their excellent properties. In this paper, new 2D carbon nitride (CN) organic materials are successfully prepared on the basis of the organic synthesis theory, and the thickness is about 1.5 nm. This new 2D CN organic material further strengthens the 2D materials family. Meanwhile, their synthetic mechanism is theoretically speculated. Then CN photocatalysts of several structures are obtained by roasting 2D CN organic materials. Through the photocatalytic hydrogen production experiments, the results exhibit that these kinds of photocatalysts have good photocatalytic effects compared to common g‐C3N4.