bluuebunny/crossref_metadata_2025_split huggingface dataset:
New approach applying a pet fish air pump in liquid‐phase microextraction for the determination of Sudan dyes in food samples by HPLC
Authors: Sricharoen Phitchan , Limchoowong Nunticha , Techawongstien Suchila , Chanthai Saksit 
Published: July 2017

AbstractA new approach applying a pet fish air pump is introduced to develop an extraction method, namely, air‐pump‐enhanced emulsion, followed by salt‐assisted emulsion breaking based on solidified floating organic drop microextraction for the extraction and preconcentration of Sudan I–IV before high‐performance liquid chromatography. The applicability of this method was successfully demonstrated by determination of these dyes in four chili products that include chili powder, chili oil, chili sauce, and chili paste. An enrichment factor of 62 was obtained only with a sample solution of 5 mL. A linear range of 0.5–2500 ng/mL was obtained with a limit of detection of 0.16–0.24 ng/mL and recovery of 90–110%. This method is superior to other liquid–liquid extraction methods, as is simple, rapid, environmental friendly, and its phase separation needs no centrifugation. It also needs no disperser solvent and requires less organic solvent, and satisfies the criteria to be called as a green extraction. Therefore, this facile extraction method can be successfully applied in the determination of Sudan dyes in food samples.
Four‐Phase Morphologies in Blends of ABC and BAC Triblock Terpolymers
Authors: Haenelt Taida Gil , Abetz Clarissa , Abetz Volker 
Published: July 2017

AbstractIt is investigated how binary blends of two asymmetric triblock terpolymers with the same type of monomers but different block sequences (ABC, BAC) and different block lengths lead to three new ABAC tetrablock terpolymer like morphologies. This study ascribes the formation of four microphases to a parallel chain orientation during the blend process. Because of the resultant spatial superposition, the B‐blocks of both block copolymers can mix into each other as well as both C‐blocks, whereas both A‐blocks form independent microphases. The self‐assembly of nine blends are studied. Their morphologies depend on the blending ratio and are monitored by transmission electron microscopy and small‐angle X‐ray scattering. Besides single morphologies, also coexisting morphologies are obtained, indicating that different superstructures are stable within finite compositional ranges of the blends. This work demonstrates that blending of triblock terpolymers with different block sequence is another interesting way in the huge area of morphological engineering by blending of block copolymers, leading to new and even complex, tailored nanostructures.
Circular base loaded modified rectangular monopole radiator for super wideband application
Authors: Okas Piyush , Sharma Anand , Gangwar Ravi Kumar 
Published: July 2017

AbstractThis letter investigates a circular base loaded modified rectangular monopole radiator. Two main aims of presented research article are: (a) to achieve super wide bandwidth with the help of circular base loaded rectangular monopole, tapered microstrip line feed and elliptical ground plane; (b) to increase bandwidth dimension ratio (BDR) with the help of modification in rectangular monopole. To authenticate the proposed radiator, prototype has been fabricated and measured. Experimental outcome shows that the proposed radiator operates over the frequency range from 0.96 to 13.98 GHz (VSWR < 2) with a bandwidth ratio of 14.56:1 and having fractional bandwidth of 174.29%. Bandwidth dimension ratio for proposed radiator is 7468.51. Time domain analysis has also been performed to support the applicability of proposed radiator in super wideband applications.
High efficiency 33–37 GHz 20 W GaN HEMT power amplifier MMIC
Authors: Tao Hong‐Qi , Hong Wei , Zhang Bin , Yu Xu‐Ming 
Published: July 2017

AbstractA high efficiency Ka‐band GaN high power amplifier (HPA) utilizing 0.15‐μm gallium nitride (GaN) high electron mobility transistor (HEMT) technology is presented in this letter. The MMIC is designed with load‐pull method, with the final stage matched to compromise between output power and power added efficiency (PAE). An output power of more than 43 dBm and a power added efficiency of more than 30% over the band of 33–37 GHz under a drain voltage of 24 V at 100 μs pulse‐width and 10% duty‐cycle have been achieved. The chip size is 2.8 mm × 3.4 mm (9.52 mm2).
Novel design of a compact RFID chipless tag at 860, 915 MHz, and 2.4 GHz bandwidth
Authors: Di Renna Roberto B. , Corrêa Carina R. B. , Magri Vanessa P. R. , Ferreira Tadeu N. , Silva Maurício W. B. , Matos Leni J. , Souza Jorge A. M. 
Published: July 2017

AbstractThis article presents a chipless radio frequency identification (RFID) tag which operates in the frequency span from 0.86 to 2.5 GHz. This new miniature chipless tag is developed to work for Brazilian RFID regulation. It does not require a ground plane and has a compact size of 85.50 × 53.98 mm2, comparable to a credit card. The tag has been measured in a bi and mono‐static arrangement with two double‐ridge horn antennas, with a significantly response at frequency range measurements.
2D microwave metallic photonic crystal point‐defect‐cavity resonator
Authors: Xie Chenglong , Chen Chun‐Ping , Anada Tetsuo 
Published: July 2017

AbstractNovel microwave high‐Q point‐defect‐cavity (PDC) resonators based on metallic photonic crystals (M‐PhCs) are experimentally studied. After the illustration of the band structure of M‐PhCs, the first two resonant modes of a PDC are computed by supper‐cell methods. The results show that the Q‐value of M‐PhC PDCs is almost the same as that of the traditional waveguide cavity resonators. Moreover, the PDC is then fabricated and experimentally measured. The measured resonant frequencies and Q‐factors are compared with the calculated ones to validate our computation and show the property of the proposed PDC.
Bidirectional circularly polarized microstrip antenna using axis‐symmetrical cross‐shaped slotted ground
Authors: Noh Yoonsang , Shin Yooncheol , Lee Min‐Jae , Pyo Seongmin 
Published: July 2017

AbstractThis article proposes a new microstrip antenna design for realizing bidirectional opposite‐sense circular polarization. For bidirectional circularly polarized radiation, the identical electric field with quadrature phase relationship are utilized using the orthogonal feeding and the asymmetrical cross‐shaped ground slot perturbing element. The measurement results of the proposed antenna show in good agreement with the simulations of reflection coefficients, axial ratios, antenna gains, and radiation patterns.
Circularly polarized cylindrical dielectric resonator antenna excited by square ring slot with a T‐shaped microstrip line
Authors: Kumari Reena , Gangwar Ravi Kumar 
Published: July 2017

AbstractIn this article, a cylindrical dielectric resonator antenna (CDRA) excited by a 45° rotated square ring slot with a T‐shaped coupling microstrip line is investigated for circularly polarized (CP) operation. The proposed antenna shows the dual band characteristics and the lower band is generated due to T‐Shaped microstrip line and upper band is due to CDRA. In the proposed antenna, the two degenerate broadside orthogonal modes (
mode and
mode) of the CDRA are used to realize CP radiation. The prototype of the proposed antenna has been fabricated and tested. The measured |S11| bandwidth in the lower and upper band is found to be 14.65 and 19.86%, respectively. The measured 3‐dB axial ratio bandwidth of 1.46 and 6.01% is achieved in the upper band only. Proposed antenna has been found suitable for wireless application.
Scanning range increase of microstrip dipole phased array by parasitic strips
Authors: Guo Jiajia , Xiao Shaoqiu , Wang Bing‐Zhong 
Published: July 2017

AbstractIn this article, a novel method is introduced to improve the scanning range of the conventional microstrip dipole phased array with half wavelength element spacing. Parasitic strips are used beside every microstrip dipole in the phased array, which not only influence the performance of the microstrip dipole, but also increase the mutual coupling among the elements. The active element pattern of each element is changed as needed because of parasitic strips and mutual coupling, and then the 3‐dB scanning range of the phased array is increased. 1 × 6 microstrip dipole phased array with and without parasitic strips have been designed and fabricated. The measurement results show that they both have good performance on the reflection coefficient at 5.75 GHz and the 3‐dB scanning range is increased from ±40° to ±52°. This method has the advantage that the element size, array size, and profile can all keep unchanged. Meanwhile, the designed array is low‐cost.
Double‐layer broadband circular polarizer based on fission transmission of linear polarization for ku‐band applications
Authors: Mangi Farman Ali , Xiao Shaoqiu , Yao Zhixin , Imran Memon , Kakepoto Ghulam Fatima 
Published: July 2017

AbstractA double‐layer broadband circular polarizer based on fission transmission of linear polarized (FTLP) for Ku‐band applications is presented. Firstly, the novel approach of “fission transmission of linear polarization” is introduced to investigate the polarization transformation behaviour (giant CD effect and optical activity) for linear‐to‐circular polarization. The designed structure achieves broadband circularly polarized wave with asymmetric transmission (AT) wave emission under the principle of (FTLP). The proposed structure achieves a right‐handed circularly polarized (RHCP) wave at 13.94–15.70 GHz, respectively. The axial ratio bandwidth of 11.76% is obtained from 13.94 to 15.70 GHz. The simulated and measured results exhibit good correspondence.
RWG‐integrated SIW splitter for large scale SATCOM phased array applications
Authors: Abdel‐Wahab Wael M. , Al‐Saedi Hussam , Safavi‐Naeini Safieddin 
Published: July 2017

AbstractIn this article, the hybrid transition power splitter, which consists of metallic rectangular waveguide and substrate integrated waveguide, is presented for large‐scale millimeter‐wave antenna array broad band mobile satellite communication system. The power is coupled between the RWG and the SIW through two center‐slot transition, one etched on the SIW ground plane and the other cut through metallic RWG narrow side wall. The two‐way RWG‐SIW transition splitter was designed and simulated; then the four‐way splitter was designed, fabricated, and tested. The measured results show good agreements with the simulated ones and the measured return and insertion loss better than 10 and ∼1.50 dB were experimentally achieved over the band 28.70–30.20 GHz, respectively.
An ultra‐thin compact polarization insensitive dual band absorber based on metamaterial for X‐band applications
Authors: Kumari Khusboo , Mishra Naveen , Chaudhary Raghvendra Kumar 
Published: July 2017

AbstractIn this article, an ultra‐thin compact polarization insensitive dual band absorber based on metamaterial for X‐band applications has been presented. The unit cell of proposed absorber structure consists of resonator I and resonator II printed on the top of metal backed FR4 epoxy dielectric substrate of thickness 0.6 mm. The proposed structure offers two absorption peaks at the frequency of 8.51 and 9.12 GHz with peak absorption value of 99.33 and 99.49%, respectively. The FWHM bandwidth of proposed absorber structure at 8.51 GHz is 400 MHz (8.33 −8.73 GHz) and at 9.12 GHz is 430 MHz (8.89–9.32 GHz). The absorptivity of the designed absorber structure has been also investigated under various polarization and oblique incident angles. The absorption behavior of the designed absorber structure has been studied by illustrating electric field and surface current distribution plots. Additionally, the absorption behavior of the proposed absorber structure has been also explained using input impedance plot. Dispersion diagram plot has been used to explain the metamaterial property of the designed absorber structure. The proposed absorber structure shows compactness of 0.173λo and 0.185λo and exhibits ultra‐thin thickness of 0.017λo and 0.018λo with respect to the absorption peaks of 8.51 and 9.12 GHz, respectively. To perform the experimental measurement, the proposed absorber structure has been fabricated. It is seen that the measured result shows good agreement with the simulated one.
The diffuse Nitsche method: Dirichlet constraints on phase‐field boundaries
Authors: Nguyen Lam H. , Stoter Stein K.F. , Ruess Martin , Sanchez Uribe Manuel A. , Schillinger Dominik 
Published: July 2017

SummaryWe explore diffuse formulations of Nitsche's method for consistently imposing Dirichlet boundary conditions on phase‐field approximations of sharp domains. Leveraging the properties of the phase‐field gradient, we derive the variational formulation of the diffuse Nitsche method by transferring all integrals associated with the Dirichlet boundary from a geometrically sharp surface format in the standard Nitsche method to a geometrically diffuse volumetric format. We also derive conditions for the stability of the discrete system and formulate a diffuse local eigenvalue problem, from which the stabilization parameter can be estimated automatically in each element. We advertise metastable phase‐field solutions of the Allen‐Cahn problem for transferring complex imaging data into diffuse geometric models. In particular, we discuss the use of mixed meshes, that is, an adaptively refined mesh for the phase‐field in the diffuse boundary region and a uniform mesh for the representation of the physics‐based solution fields. We illustrate accuracy and convergence properties of the diffuse Nitsche method and demonstrate its advantages over diffuse penalty‐type methods. In the context of imaging‐based analysis, we show that the diffuse Nitsche method achieves the same accuracy as the standard Nitsche method with sharp surfaces, if the inherent length scales, ie, the interface width of the phase‐field, the voxel spacing, and the mesh size, are properly related. We demonstrate the flexibility of the new method by analyzing stresses in a human vertebral body.
Control of thermoresponsivity of biocompatible poly(trimethylene carbonate) with direct introduction of oligo(ethylene glycol) under various circumstances
Authors: Chanthaset Nalinthip , Takahashi Yoshikazu , Haramiishi Yoshiaki , Akashi Mitsuru , Ajiro Hiroharu 
Published: July 2017

ABSTRACTPoly(trimethylene carbonate) (PTMC) is a well‐known biodegradable polymer with good biocompatible properties which make it suitable for biomedical applications. Poly(5‐[2‐{2‐(2‐methoxyethoxy)ethyoxy}‐ethoxymethyl]‐5‐methyl‐1,3‐dioxa‐2‐one) (PTMC‐MOE3OM) and copolymers, bearing oligo ethylene glycol (OEG) at the side chain of PTMC backbone, were selected to investigate the cloud point behavior by solvents such as PBS, water, 10% ethanol solution and various ionic strengths. A pH‐responsive copolymer, poly(TMCM‐MOE3OM‐co‐(5‐methyl‐5‐carboxylic‐1,3‐dioxane‐2‐one)) as carboxylic acid carbonate showed a decreased critical temperature at pH 2. Photo‐responsive copolymer, poly(TMCM‐MOE3OM‐co‐coumarin derivatives) bearing 1% and 10% of photo‐induced molecules (7‐[(5‐(5‐methyl‐1,3‐dioxa‐2‐one)methoxy)]‐methoxy coumarin (TMCM‐coumarin)) exhibited a low cloud point because of the hydrophobic moieties. Meanwhile, alternative coumarin polymer including 2% of 4‐methyl‐7‐[(5‐(5‐methyl‐1,3‐dioxa‐2‐one)methoxy)butoxy)]‐methoxy coumarin (TMCM‐4‐methyl‐coumarin) has been successfully synthesized and copolymerized as a novel molecule. The various combinations of monomers were studied and the significant properties were determined via external triggers after copolymerization. This study showed basically synthetic progress toward designs and trivial rationalization of thermoresponsive copolymers close to body temperature. At present, various pendant groups as side part affect to the lower critical solution temperature (LCST) and biodegradable polymer in order to utilize the actual external stimuli application. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3466–3474
Prevalence and initial prescription of psychotropics in patients with common cancers in Japan, based on a nationwide health insurance claims database
Authors: Sato Izumi , Onishi Hideki , Yamada Shuhei , Kawakami Koji 
Published: July 2017

AbstractObjectiveTo investigate the prevalence of psychotropic medication use and identify factors affecting the prescription of psychotropics among patients newly diagnosed with any of 8 common types of cancer.MethodsThis retrospective descriptive study examined data for patients newly diagnosed with breast, colorectal, liver, lung, ovarian, pancreatic, prostate, or stomach cancer between July 2009 and May 2014. The data were derived from a nationwide health claims database. The proportion of initial prescriptions for all oral psychotropics within 13 months of cancer diagnosis was analyzed by cancer type; the odds ratio (OR) for prescribing psychotropics was calculated using multivariable logistic regression models.ResultsA total of 14 661 patients were newly diagnosed with cancer. Psychotropics were prescribed for 6593 (45%) patients. The highest and lowest proportions of psychotropic prescriptions were recorded for patients with lung cancer (62.6%) and prostate cancer (35.1%), respectively. The strongest predictors for psychotropic prescriptions were chemotherapy (OR, 2.59; 95% confidence interval [CI], 2.31–2.91; P < .001), lung cancer (OR, 2.47; 95% CI, 2.16–2.83; P < .001), and surgery (OR, 2.12; 95% CI, 1.97–2.28; P < .001).ConclusionsThe prevalence of and predictors for an initial prescription of psychotropics identified a potential target population of cancer patients requiring psychiatric treatment, particularly soon after a diagnosis of cancer.
Accurate template‐based modeling in CASP12 using the IntFOLD4‐TS, ModFOLD6, and ReFOLD methods
Authors: McGuffin Liam J. , Shuid Ahmad N. , Kempster Robert , Maghrabi Ali H.A. , Nealon John O. , Salehe Bajuna R. , Atkins Jennifer D. , Roche Daniel B. 
Published: July 2017

AbstractOur aim in CASP12 was to improve our Template‐Based Modeling (TBM) methods through better model selection, accuracy self‐estimate (ASE) scores and refinement. To meet this aim, we developed two new automated methods, which we used to score, rank, and improve upon the provided server models. Firstly, the ModFOLD6_rank method, for improved global Quality Assessment (QA), model ranking and the detection of local errors. Secondly, the ReFOLD method for fixing errors through iterative QA guided refinement. For our automated predictions we developed the IntFOLD4‐TS protocol, which integrates the ModFOLD6_rank method for scoring the multiple‐template models that were generated using a number of alternative sequence‐structure alignments. Overall, our selection of top models and ASE scores using ModFOLD6_rank was an improvement on our previous approaches. In addition, it was worthwhile attempting to repair the detected errors in the top selected models using ReFOLD, which gave us an overall gain in performance. According to the assessors' formula, the IntFOLD4 server ranked 3rd/5th (average Z‐score > 0.0/–2.0) on the server only targets, and our manual predictions (McGuffin group) ranked 1st/2nd (average Z‐score > −2.0/0.0) compared to all other groups.
A comparison using Faraday cups with 1013 Ω amplifiers and a secondary electron multiplier to measure Os isotopes by negative thermal ionization mass spectrometry
Authors: Wang Guiqin , Sun Tiantian , Xu Jifeng 
Published: July 2017

RationaleAccording to the Johnson‐Nyquist noise equation, the value of electron noise is proportional to the square root of the resistor value. This relationship gives a theoretical improvement of
in the signal/noise ratio by going from 1011 Ω to 1013 Ω amplifiers for Faraday detection in thermal ionization mass spectrometry (TIMS).MethodsWe measured Os isotopes using static Faraday cups with 1013 Ω amplifiers in negative thermal ionization mass spectrometry (NTIMS) and compared the results with those obtained with 1011 Ω amplifiers and by peak‐hopping on a single secondary electron multiplier (SEM). We analysed large loads of Os (1 μg) at a range of intensities of 187OsO3 (0.02–10 mV) in addition to small loads of Os (5–500 pg) to compare the results of the three methods.ResultsUsing 1013 Ω amplifiers, the long‐term reproducibility determined from Merck Os was 187Os/188Os = 0.1211 ± 0.0086 and 0.120229 ± 0.000034 at 0.02 mV and 10 mV of 187OsO3 intensities. Meanwhile, the analysed JMC Os loadings of 5 and 500 pg showed 187Os/188Os = 0.10669 ± 0.00036 and 0.106807 ± 0.000023. In comparison, the values measured by the SEM were 187Os/188Os = 0.10704 ± 0.00056 and 0.10690 ± 0.00013. All errors are in 2 standard deviation (SD).ConclusionsBoth the accuracy and the precision determined using the 1013 Ω amplifiers and the SEM are identical when the Os amounts are within 10–50 pg. However, the former analysis time can be shortened by approximately two‐thirds. The SEM measurement is still the most precise method for Os amounts <10 pg, but the analyses using 1013 Ω amplifiers suggest they are significantly better than the SEM for Os amounts >50 pg.
Supervisory adaptive fault‐tolerant control against actuator failures with application to an aircraft
Authors: Ouyang Hupo , Lin Yan 
Published: July 2017

SummaryIn this paper, a supervisory adaptive fault‐tolerant control scheme is proposed for a class of uncertain nonlinear systems with multiple inputs. The multiple inputs are the outputs of an actuator group that may act either on one control surface or on multiple control surfaces and may fail during operation. With some actuator groups as backups, the supervisory adaptive control includes 2 modes: the adaptive compensation mode and the switching mode. The former is used to compensate for the failure of an actuator group as long as at least one actuator of the group works normally, and the latter, to switch the controller from a failed group to a healthy one when the failure is detected by one of the monitoring functions that are constructed to supervise some variables related to system stability. It is shown that with the proposed scheme, all signals of the closed‐loop system are bounded, and prescribed transient and steady state performance of the tracking error can be guaranteed. An aircraft example is used to demonstrate the application of the proposed scheme.
Mechanical properties of plasma‐treated carbon fiber reinforced PTFE composites with CNT
Authors: Ronghao Li , Keqiang Li , Haiyong Tian , Jianmin Xue , Shaoquan Liu 
Published: July 2017

This paper is concerned with the effects of the plasma surface treatment and the addition of CNT on the mechanical properties of carbon fiber/polytetrafluoroethylene (PTFE) composite. The tensile and flexural strength of composites containing CNT and plasma‐treated carbon fibers improved. The flexural strength first decreases with respect to the CF content. The flexural strength increases to 179 MPa for the plasma‐treated composite as compared with 167 MPa for the neat carbon fiber composites. The overall improvement is thus nearly 8%.
Photoreduction Dependent p‐ and n‐Type Semiconducting Field‐Effect Transistor Properties in Undoped Reduced Graphene Oxide
Authors: Takehira Hiroshi , Islam Md. Saidul , Karim Mohammad Razaul , Shudo Yuta , Ohtani Ryo , Lindoy Leonard F. , Taniguchi Takaaki , Osada Minoru , Hayami Shinya 
Published: July 2017

AbstractBoth p‐ and n‐type field effect transistors (FET) properties have been observed in undoped reduced graphene oxide (rGO). Short and long time exposure of GO during photo reduction results in the formation of respective p‐ and n‐type rGO semiconductor. Achieving duel behavior of this type in an undoped material is exceedingly unusual. Herein we report the presence of such behavior in the reduced from of graphene oxide (rGO) for the first time.