bluuebunny/crossref_metadata_2025_split huggingface dataset:
Printed nonuniform antenna array for WI‐FI sectorized communications
Authors: Varum Tiago , Matos João N. , Pinho Pedro , Abreu Ricardo 
Published: June 2015

ABSTRACTWireless networks have joined to the sports venues, offering to the public a set of facilities, such as the access to email, news, and also to use the social networking, uploading their photos. New challenges have emerged to provide Wi‐Fi in this densely populated stadiums, such as increasing capacity and coverage. In this article, an access point antenna array to cover a sector of a stadium is presented. Its structure, designed in a low cost material allows to reduce the total manufacturing costs, an important factor due to the large number of antennas required in these venues. The material characteristic, the broad bandwidth of operation (300 MHz), along with to the low side lobe levels, important to reduce interference between sectors, makes this antenna well‐positioned for wireless communications in these particular locals. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2037–2041, 2015
Miniaturization of patch antenna using metasurface
Authors: Zhu Hailiang L. , Cheung S. W. , Yuk T. I. 
Published: June 2015

ABSTRACTIn this letter, it is proposed to use metasurface (MS) to miniaturize patch antenna. The MS studied is composed of two layers, layers 1 and 2. Layer 1 has simple rectangular microstrip lines as unit cells and layer 2 has the complimentary pattern of layer 1. The MS is placed on top of and in direct contact with a small patch antenna, forming a miniaturized‐patch antenna operating at 4 GHz. For comparison, another patch antenna without using MS is designed to operate at the same frequency. Both antennas are studied using computer simulation and measurement. Results show, with the use of the MS, the patch antenna can have the size reduced by 67%, yet achieving a similar performance. The simulated and measured results in reflection coefficients, efficiencies, realized peak gains, and radiation patterns of the antennas are presented. The cable effects caused by the feeding cable used in measurement are studied. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2050–2056, 2015
A new design and analysis of a hexagonal PBG microstrip antenna
Authors: Pereira Jonathan P. P. , da Silva José P. , de Andrade Humberto D. 
Published: June 2015

ABSTRACTThis work aims to analyze the factors that influence the radiation properties of dualband microstrip antenna using periodic structures based on Photonic Band Gap with hexagonal symmetry. An increase in bandwidth and a reduction of return loss for the second operating band of the antenna were observed. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2147–2151, 2015
A differentially coupled series inductor for differential RFICs
Authors: Lee Changhyun , Yoon Seokhyun , Park Changkun 
Published: June 2015

AbstractIn this work, we propose a differentially coupled series inductor for RFIC‐matching networks. The proposed inductor is designed to reduce the chip area and to enhance the inductance. If a series inductor is required in differential RFICs, two bulky inductors should be implemented. The overall chip size thereby increases considerably. The proposed differentially coupled series inductor can be used instead of two series inductors in a differential RFIC. The size of the proposed inductor is less than half that of two conventional spiral inductors. From the measured results, the feasibility of the proposed differentially coupled series inductor is successfully proved. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2223–2225, 2015
Reconfigurable multiband tapered slot antenna
Authors: Chagharvand Sahar , Hamid Mohamad R. , Kamarudin Muhammad R. , Ghanem Farid 
Published: June 2015

ABSTRACTIn this article, a reconfigurable multiband tapered slot antenna is proposed. This antenna is able to support wideband, dual‐band, and triple‐band operations. This is achieved by incorporating T‐ and C‐ shaped resonators that are used to integrate a filtering functionality to the antenna. The behavior of the antenna can be reconfigured by activating/deactivating the different resonators by means of PIN diode switches. By activating only the T‐shaped resonator, a bandstop operation is obtained which results in a dual‐band operation, while by coupling both T‐ and C‐shaped resonators, a triple‐band operation is achieved. By deactivating all of the resonators, a wideband operation is achieved. Results show, the frequency range of the wideband operation spans from 1.04 to 3.76 GHz. In the dual‐band operation mode, the suppressed band is around 2.5 GHz. The operating frequency range of the triple‐band operation is divided into low frequency (0.97–1.24 GHz), midfrequency (1.63–2.08 GHz), and high frequency (2.64–3.71 GHz) bands. To validate the proposed approach both simulated and measured results are given and a good agreement is observed. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2182–2186, 2015
Age‐related differences in attention and memory toward emotional stimuli
Authors: Bi Dandan , Han Buxin 
Published: July 2015

AbstractFrom the perspectives of time perception and motivation, socioemotional selectivity theory (SST) postulates that in comparison with younger adults, older adults tend to prefer positive stimuli and avoid negative stimuli. Currently the cross‐cultural consistency of this positivity effect (PE) is still not clear. While empirical evidence for Western populations is accumulating, the validation of the PE in Asians is still rare. The current study compared 28 younger and 24 older Chinese adults in the processing of emotional information. Eye‐tracking and recognition data of participants in processing pictures with positive, negative, or neutral emotional information sampled from the International Affection Picture System were collected. The results showed less negative bias for emotional attention in older adults than in younger adults, whereas for emotional recognition, only younger adults showed a negative bias while older adults showed no bias between negative and positive emotional information. Overall, compared with younger adults, emotional processing was more positive in older adults. It was concluded that Chinese older adults show a PE.
Generation and collection of photocarriers in dilute nitride GaInNAsSb solar cells
Authors: Miyashita Naoya , Ahsan Nazmul , Okada Yoshitaka 
Published: June 2015

AbstractAn improved photocurrent production is demonstrated in dilute nitride GaInNAsSb solar cells grown by molecular beam epitaxy. The photovoltaic properties were investigated by increasing the thickness of GaInNAsSb layers from 1.0 to 3.0 µm. The amount of photon absorption increased with increasing thickness. Yet an incomplete photocarrier collection was observed in the 2.0‐ and 3.0‐µm‐thick GaInNAsSb devices. This feature is due to a partial lack of electric field in the GaInNAsSb region. In order for complete carrier collection aided by the electric field, the background‐doping level should be as low as ~1014 cm−3 in a thick undoped‐GaInNAsSb absorption layer. Here, the effectiveness of annealing on improving the field‐assisted carrier collection is shown. This is ascribed to a decrease of the background doping in the GaInNAsSb layer. In a properly designed device for a 1.0‐eV GaInNAsSb cell, it is demonstrated that the external quantum efficiency can reach as high as 90% at wavelengths longer than the GaAs bandgap. Copyright © 2015 John Wiley & Sons, Ltd.
Synthesis and Application of Borate Ester Bonding Agents for a Four‐Component Hydroxy‐Terminated Polybutadiene Propellant
Authors: Zhang Xi‐Long , Liu Miao‐E , Tan Xiang‐Lu , Peng Jie , Deng Jian‐Ru 
Published: July 2015

AbstractLow molecular weight interconnection monomers including polyepichlorohydrin, poly(propylene oxide), poly(ethylene glycol adipate), and poly(butylene adipate) were synthesized to evaluate the effects of the molecular structure of interconnection monomers on the bonding efficiency of borate ester bonding agents (BEBA) applied in four‐component hydroxy‐terminated polybutadiene (HTPB) propellants. The monomers were characterized by IR spectroscopy, elemental analysis, and gel permeation chromatography. A series of new borate ester bonding agents were synthesized using the as‐synthesized interconnection monomers as well as poly(ethylene glycol) and applied in the preparation of four‐component HTPB propellants. The application results showed that BEBA‐4 prepared from poly(butylene adipate) could significantly improve the mechanical properties of the four‐component HTPB propellant, reduce the slurry viscosity leading to improvement of processing properties and aging resistant performance, while no significant effect on the burning characteristics of the propellant was observed.
Community Gender Norms Change as a Part of a Multilevel Approach to Sexual Health Among Married Women in Mumbai, India
Authors: Schensul Stephen L. , Singh Rajendra , Schensul Jean J. , Verma Ravi K. , Burleson Joseph A. , Nastasi Bonnie K. 
Published: July 2015

AbstractInequitable gender norms in societies and communities negatively contribute to women’s sexual and reproductive health. While the need for change in gender norms is well recognized, the task is highly challenging in terms of intervention design, implementation and assessment of impact. This paper describes a methodology for identification of gender norms, the design of community level intervention, community participation and the assessment of intervention impact in a low income, predominately Muslim community of 600,000 people in Mumbai, India. Formative research focused on in‐depth interviews with women, men and couples yielding gender normative statements and assessment of community resources to facilitate change. A Gender Equity Scale (GES) based on this formative research was developed and administered annually for a three‐year period to random, cross‐sectional samples in the intervention and control communities, and to community based, non‐governmental organizations (NGO) staff and Imams (religious leaders) in the intervention community. NGO staff disseminated gender oriented messages to their female constituency through their regular outreach activities and through special events and festivals in the community. Imams disseminated gender messages through lectures on social issues for men attending Friday prayers. The results showed that the NGO staff and Imams, assumed more gender equitable attitudes across time. The intervention was associated with a significant improvement in attitudes towards gender equity in the intervention relative to the control community. Men showed a dramatic change in more positive gender attitudes, while women lagged behind in their GES scores. The meaning of these results are explored and the implications assessed for the generalizability of the methodology for other countries, cultures and communities.
Pyrolysis Results of Shales from the South Cambay Basin, India: Implications for Gas Generation Potential
Authors: Mishra Snigdharani , Mani Devleena , Kavitha S. , Patil D. J. , Kalpana M. S. , Vyas D. U. , Dayal A. M. 
Published: June 2015

Abstract:
Shale, an abundant organic-rich sedimentary rock of extremely low porosity, is of lately being realized as a significant energy source, owing to the possibility of huge amount of natural gas which may be stored in it. Instigated by the enormous production of natural gas from the shale formations of Barnett, Marcellus and several other plays in USA, the Indian sedimentary basins are being looked assertively for their shale gas prospects. The petroliferous Cambay basin in western India with interbedded carbonaceous shales in its thick Tertiary sequence forms a potential prospect for the shale gas. Fine grained, clastic and organic-rich Cambay, Tarapur and other Tertiary shales have sourced the oil and gas for the basin.
The quality, quantity and type of organic matter play an important role in the generation of gas in shale horizons. Rock-Eval pyrolysis is one of the most basic organic geochemical methods to study these parameters. In the present study, the interbedded shale formations within the middle Eocene lignite sequences, referred to as Cambay Formation, (Nagori et al., 2013), of the Tadkeshwar and Rajpardi mines in Surat and Bharuch districts, respectively, have been sampled to study the organic matter properties using Rock-Eval pyrolysis. The sedimentary sequences exposed in the mines show the shales to be high in Total Organic Carbon (TOC) content, ranging between 0.2% to 47.3%. The S1 (free hydrocarbons) and S2 (hydrocarbons from cracking of kerogen) values range between 0.04 to 7.12 and 0.08 to 190.11 mg HC/g rock, respectively. The Tmax (temperature at highest yield of S2) varies between 342°C to 450°C, and the hydrogen index (HI) ranges between 32 to 754 mg HC/ g TOC. The variation of HI vs. Tmax suggests an immature to mature stage for the hydrocarbons. The organic matter in shales is characterized by Type II / III kerogen, suitable for the generation of gas.
Microfacies Types (MFT) and Palaeoenvironment of the Umlatodoh Carbonates in the Shillong Plateau of Meghalaya, NE India
Authors: Kalita Kalpana Deka , Gogoi Hemlet 
Published: June 2015

Abstract:
One of the major marine transgressions in the Shillong Plateau is represented by the middlemost Umlatodoh Formation of the Sylhet Limestone Group during early Eocene. Based on 26 species of Larger Benthic Foraminifera (LBF) and eleven species of calcareous red algae and green algae, nine Tethyan MFT (microfacies types) viz, Miliolid Packstone-Grainstone, Algal Packstone-Grainstone, Miliolid Grainstone, Larger Benthic Foraminiferal Grainstone, Green Algae Grainstone, Alveolina oblonga Grainstone, Oolitic Packstone-Grainstone and Micrite have been identified for the Umlatodoh Limestone. These microfacies have contributed towards identification of a range of environments from low-energy, shallow neritic inner-shelf through shallow, reef shelf to more restricted environment represented by pure micrite. Petrographical characteristics indicate that these limestones are primarily microcrystalline allochemical rocks of biomicritic type and a mixture of packstone and grainstone. The foraminiferal assemblage associated with various species of coralline red algae and green algae suggests inner ramp, mud-free shallow neritic shelf carbonate sedimentation of the Umlatodoh Limestone showing depositions in calm water, low-energy conditions in the lower part changing to moderately high-energy conditions in the middle followed by low-energy restricted environment represented by micrite towards the upper part.
Ten-year trends in stroke admissions and outcomes in Canada
Authors: Kamal Noreen , Lindsay M. Patrice , Côté Robert , Fang Jiming , Kapral Moira K. , Hill Michael D. 
Published: July 2015

AbstractBackgroundWe analyzed a 10-year stroke administrative dataset to examine trends in admissions, mortality, and discharge destination in Canada.MethodsWe conducted an analysis of hospital administrative data from April 1st 2003 to March 31st 2013 from the Canadian Institute of Health Information’s Discharge Abstract Database. Ten-year trends for population-based age- and sex-standardized admission rates were calculated. We reviewed 10-year trends in absolute stroke admissions for differences between provinces and age groups. Stroke 30-day in-hospital mortality rates were calculated and adjusted for sex, age, stroke type and comorbidities. We documented changes in discharge location for ischemic and hemorrhagic stroke patients discharged from acute care.ResultsThe rate of hospital admissions has declined from 140.2 to 117.5 (per 100,000 people). The number of absolute stroke admissions within provinces increased in Alberta and British Columbia (21.7% and 16.2% respectively). The proportion of stroke patients aged 40-69 years old increased by 4.8% (p<0.0001) over the 10 years, whereas the proportion aged over 70 decreased by 4.9% (p<0.0001). Risk-adjusted 30-day in-hospital mortality decreased from: 18.5% to 14.9% for all strokes; 15.2% to 12.1% for ischemic strokes; 35.6% to 29.7% for intracerebral hemorrhage; and 25.1% to 18.0% for subarachnoid hemorrhage. The absolute increase in patients requiring inpatient and outpatient support increased by 4% (p<0.0001).ConclusionThe rate of admissions for stroke is decreasing but there is an increase in stroke admissions for younger patients. In-hospital mortality is decreasing; fewer patients are going directly home without services and more are requiring support services.
General Practitioner Preferences in Managing Care of Multiple Sclerosis Patients
Authors: Bray Mathieu , Wolfson Christina , Moore Fraser , Zhu Bin , Uniat Jennifer 
Published: July 2015

AbstractBackground:Multiple sclerosis (MS) is a lifelong neurological disorder requiring care in a variety of settings. The purpose of this study is to describe preferences of general practitioners (GPs) with regards to providing care for MS patients.Methods:A stratified sample of 900 GPs in the province of Quebec were sent a questionnaire, with 266 returning completed questionnaires. Respondents were surveyed about their preferences using four clinical scenarios describing hypothetical patients experiencing different stages of MS. Respondents were asked whether they would continue managing the patient themselves, formally refer the patient to a specialist, or seek specialist advice.Results:In two scenarios representing stable courses, 40.9% and 61.6% of GPs, respectively, intended to manage the patient themselves. GPs who reported having experience with MS patients were more likely to report an intention to continue management. In one scenario, GPs operating in rural areas were less likely to consider management than those in the Montreal metropolitan area (odds ratio=0.422, 95% confidence interval 0.20-0.90).Conclusions:For MS patients with a stable disease course, an important proportion of GPs appear to be willing to manage long-term care for MS patients.
Ethics Issues in Social Media–Based HIV Prevention in Low- and Middle-Income Countries
Authors: CHIU CHINGCHE J. , MENACHO LUIS , FISHER CELIA , YOUNG SEAN D. 
Published: July 2015

Abstract:Questions have been raised regarding participants’ safety and comfort when participating in e-health education programs. Although researchers have begun to explore this issue in the United States, little research has been conducted in low- and middle-income countries, where Internet and social media use is rapidly growing. This article reports on a quantitative study with Peruvian men who have sex with men who had previously participated in the Harnessing Online Peer Education (HOPE) program, a Facebook-based HIV education program. The survey assessed participants’ ethics-relevant perspectives during recruitment, consent, intervention, and follow-up.
The Medicalization of Love and Narrow and Broad Conceptions of Human Well-Being
Authors: NYHOLM SVEN 
Published: July 2015

Abstract:Would a “medicalization” of love be a “good” or “bad” form of medicalization? In discussing this question, Earp, Sandberg, and Savulescu primarily focus on the potential positive and negative consequences of turning love into a medical issue. But it can also be asked whether there is something intrinsically regrettable about medicalizing love. It is argued here that the medicalization of love can be seen as an “evaluative category mistake”: it treats a core human value (love) as if it were mainly a means to other ends (viz. physical health and hedonic well-being). It is also argued that Earp et al’s closing argument (that a scientific perspective on love actually adds more value to love) can be seen as involving another evaluative category mistake: it treats an object of desire and practical interest (namely, love) as if it mainly were an object of scientific contemplation and theoretical interest. It is concluded that, to relate love to health and well-being in a more satisfying way, we should construe the latter two in broader ways, whereby love is itself a component or element of human flourishing.
PRISM: Sparse recovery of the primordial spectrum from WMAP9 and Planck datasets
Authors: Paykari P. , Lanusse F. , Starck J.-L. , Sureau F. , Bobin J. 
Published: July 2015

AbstractThe primordial power spectrum is an indirect probe of inflation or other structure-formation mechanisms. We introduce a new method, named PRISM, to estimate this spectrum from the empirical cosmic microwave background (CMB) power spectrum. This is a sparsity-based inversion method, which leverages a sparsity prior on features in the primordial spectrum in a wavelet dictionary to regularise the inverse problem. This non-parametric approach is able to reconstruct the global shape as well as localised features of the primordial spectrum accurately and proves to be robust for detecting deviations from the currently favoured scale-invariant spectrum. We investigate the strength of this method on a set of WMAP nine-year simulated data for three types of primordial spectra and then process the WMAP nine-year data as well as the Planck PR1 data. We find no significant departures from a near scale-invariant spectrum.
Euclid Space Mission: building the sky survey
Authors: Tereno I. , Carvalho C.S. , Dinis J. , Scaramella R. , Amiaux J. , Burigana C. , Cuillandre J.C. , da Silva A. , Derosa A. , Maiorano E. , Maris M. , Oliveira D. , Franzetti P. , Garilli B. , Gomez-Alvarez P. , Meneghetti M. , Wachter S. ,   the Euclid Collaboration
Published: July 2015

AbstractThe Euclid space mission proposes to survey 15000 square degrees of the extragalactic sky during 6 years, with a step-and-stare technique. The scheduling of observation sequences is driven by the primary scientific objectives, spacecraft constraints, calibration requirements and physical properties of the sky. We present the current reference implementation of the Euclid survey and on-going work on survey optimization.
The cosmic radio dipole and local structure effects
Authors: Rubart Matthias , Bacon David , Schwarz Dominik J. 
Published: July 2015

AbstractWe investigate the contribution of a local over- or under-density to linear estimates of the cosmic dipole. We focus on radio continuum surveys. Recently it was shown that the radio dipole amplitude is larger than expected from the corresponding dipole of the CMB. We show that a significant contribution to this excess could come from local structure.
From data to science: Planck data and the CMB non-Gaussianity
Authors: Mangilli Anna ,   on behalf of the Planck collaboration
Published: July 2015

AbstractStudying the non-Gaussianity (NG) of the Cosmic Microwave Background (CMB) is an extremely powerful tool to investigate the properties of the very early Universe. The Planck nominal mission CMB maps yielded unprecedented constraints on primordial non-Gaussianity providing with the highest precision test of the standard model of inflation. Planck's high sensitivity also allowed to find evidence for the first time of the late-time non-Gaussianity arising from the Lensing-Integrated Sachs Wolfe (ISW) cross correlation. In this talk I will give details on the Planck data analysis and I will discuss the theoretical implications of the results.
Shape estimation for Košice, Almahata Sitta and Bassikounou meteoroids
Authors: Vinnikov Vladimir , Gritsevich Maria , Turchak Leonid 
Published: July 2015

AbstractThis paper is concerned with a meteoroid shape estimation technique based on statistical laws of distribution for fragment masses. The idea is derived from the experiments that show that brittle fracturing produces multiple fragments of size lesser than or equal to the least dimension of the body. The number of fragments depends on fragment masses as a power law with exponential cutoff. The scaling exponent essentially indicates the initial form of the fragmented body. We apply the technique of scaling analysis to the empirical data on the mass distributions for Košice, Almahata Sitta and Bassikounou meteorites.