bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Extracellular Matrix‐Mimicking Hydrogel for Full Thickness Wound Healing in Diabetic Mice
Authors: Qin Xianyan , Qiao Weizhen , Wang Yuejing , Li Tingyu , Li Xiang , Gong Tao , Zhang Zhi‐Rong , Fu Yao 
Published: May 2018

AbstractAn extracellular matrix‐mimicking hydrogel is developed consisting of a hyaluronan‐derived component with anti‐inflammatory activity, and a gelatin‐derived component offering adhesion sites for cell anchorage. The in situ‐forming hyaluronan‐gelatin (HA‐GEL) hydrogel displays a sponge‐like microporous morphology. Also, HA‐GEL shows a rapid swelling pattern reaching maximum weight swelling ratio within 10 min, while at the equilibrium state, fully swollen hydrogels display an exceedingly high water content with ≈2000% of the dry gel weight. Under typical 2D cell culture conditions, murine 3T3 fibroblasts adhere to, and proliferate on top of the HA‐GEL substrates, which demonstrate that HA‐GEL provides a favorable microenvironment for cell survival, adhesion, and proliferation. In vivo healing study further demonstrates HA‐GEL as a viable and effective treatment option to improve the healing outcome of full thickness wounds in diabetic mice by effectively depleting the inflammatory chemokine monocyte chemoattractant protein‐1 in the wound bed.
Phosphorylated α‐synuclein in the retina is a biomarker of Parkinson's disease pathology severity
Authors: Ortuño‐Lizarán Isabel , Beach Thomas G. , Serrano Geidy E. , Walker Douglas G. , Adler Charles H. , Cuenca Nicolás 
Published: May 2018

ABSTRACTBackground: PD patients often have visual alterations, for example, loss of visual acuity, contrast sensitivity or motion perception, and diminished electroretinogram responses. PD pathology is mainly characterized by the accumulation of pathological α‐synuclein deposits in the brain, but little is known about how synucleinopathy affects the retina.Objective: To study the correlation between α‐synuclein deposits in the retina and brain of autopsied subjects with PD and incidental Lewy body disease.Methods: We evaluated the presence of phosphorylated α‐synuclein in the retina of autopsied subjects with PD (9 subjects), incidental Lewy body disease (4 subjects), and controls (6 subjects) by immunohistochemistry and compared the retinal synucleinopathy with brain disease severity indicators.Results: Whereas controls did not show any phosphorylated α‐synuclein immunoreactivity in their retina, all PD subjects and 3 of 4 incidental Lewy body disease subjects had phosphorylated α‐synuclein deposits in ganglion cell perikarya, dendrites, and axons, some of them resembling brain Lewy bodies and Lewy neurites. The Lewy‐type synucleinopathy density in the retina significantly correlated with Lewy‐type synucleinopathy density in the brain, with the Unified Parkinson's disease pathology stage and with the motor UPDRS.Conclusion: These data suggest that phosphorylated α‐synuclein accumulates in the retina in parallel with that in the brain, including in early stages preceding development of clinical signs of parkinsonism or dementia. Therefore, the retina may provide an in vivo indicator of brain pathology severity, and its detection could help in the diagnosis and monitoring of disease progression. © 2018 International Parkinson and Movement Disorder Society
Three‐layered balanced circularly polarized slot antenna with high common‐mode suppression
Authors: Wu Jhe‐Han , Hsu Chung‐I. G. , Lee Ching‐Her 
Published: May 2018

AbstractThis article proposes the design of a three‐layered balanced circularly polarized (CP) antenna using two tightly stacked conventional single‐ended CP slot antennas. With a 180° delay line inserted into one of the two feeding microstrip lines that form the balanced feedline, differential‐mode (DM) input signals can excite CP radiation in the broadside directions with a measured (simulated) axial ratio of as low as 1.3 (0.86) dB. Common‐mode (CM) input signals can be well rejected with a measured (simulated) CM return loss of <0.4 (0.5) dB in the DM impedance band. In addition, only a very small proportion of the CM (DM) input signal is converted into a DM (CM) reflected one. These nice properties of the possibly first reported balanced CP antenna were all achieved without placing before the radiation element a CM‐suppression filter.
Antenna sensitivity enhancement using ground shorting pin
Authors: Lee Hongkoo , Qu Longyue , Kim Hyeongdong 
Published: May 2018

AbstractThis article proposes a design technique to increase the sensitivity of Bluetooth headset antennas. A planar inverted F antenna was designed on the top printed circuit board (PCB) of a two‐board PCB. Digital noise was designed as a loop‐type source on the bottom PCB, representing general noise derived from digital circuits and digital noise generated from the main cable line. The proposed antenna design was analyzed by means of simulation and verified by means of measurements of a fabricated antenna. The proposed technique increased the measured sensitivity by 2.23 dB.
Design of a tri‐band 180‐degree directional coupler with spurious suppression based on extended pi‐shaped microstrip line
Authors: Barik Rusan Kumar , Krishna Idury Satya , Karthikeyan S. S. 
Published: May 2018

AbstractIn this article, a tri‐band 180‐degree directional coupler with spurious suppression is proposed. This coupler is realized using the extended π‐shaped Microstrip operating at 3 different frequencies. The design equations of the extended π‐shaped structure are obtained through the ABCD matrix method. The designed coupler provides tri‐frequency response at 1.8, 3.5, and 5.2 GHz corresponding to Global System for Mobile communication, Worldwide Interoperability for Microwave Access, and wireless local area network applications, respectively. The fractional bandwidth variations of the isolation, matching, phase and amplitude imbalance at sum and difference ports are discussed in detail. In addition, the spurious bands beyond the operating frequencies are also suppressed. To validate the performances, the proposed tri‐band coupler is fabricated and tested.
An inward directed antenna for gastro‐intestinal radio pill tracking at 2.45 GHz
Authors: Fernández Marta , Thiel David V. , Arrinda Amaia , Espinosa Hugo G. 
Published: May 2018

AbstractThe accurate location of an ingested transmitter requires an array of surface electric field sensors worn on the body for more than 24 h. The small antenna (33 mm × 33 mm × 11 mm) consisting of a conductive box with a small slot (28 mm × 7 mm) pressed against the body with a centrally located feed probe was optimized to match the body impedance when located on the torso. The antenna properties when placed on different locations of the torso were calculated using computer modeling and verified using reflection measurements on 6 participants with body‐mass index between 17 and 27 kg/m2. Small center frequency shifts because of placing the antenna on different bodies and locations were within the 2.45 GHz bandwidth in all cases. The −10 dB bandwidth takes values between 0.75 and 0.97 GHz in simulations and between 0.51 and 1.15 GHz in measurements. The antenna design shows front‐to‐back isolation higher than 15 dB. The experimental results were not related to the body‐mass index of the participants.
Design of a triple‐band metamaterial absorber using equivalent circuit model and interference theory
Authors: Zeng Xianliang , Gao Meng , Zhang Linxi , Wan Guobin , Hu Bin 
Published: May 2018

AbstractIn this letter, an ultra‐thin triple‐band metamaterial absorber with high absorptivity in each band of operation is presented. The unit cell of the proposed structure consists of an outer circular metal ring and an inner Jerusalem cross on top of a thin dielectric substrate backed by metallic ground plate. Simulation responses exhibit that the proposed absorber is polarization insensitive and has a stable performance to the oblique incidence angles for both the TE and the TM polarizations. A simple equivalent circuit model and a multi‐reflection interference theory are also investigated to quantitatively explain the physical absorption mechanism. Finally, an experiment demonstration is conducted and the measurement response indicates the validity of the proposed design and the analysis methodologies.
RCS prediction at high frequency using Cauchy method
Authors: Jeon Jeonghwan 
Published: May 2018

AbstractNumerical calculation of radar cross section (RCS) at high frequency is quite challenging. In this correspondence, we apply the Cauchy method and TLS theory to RCS data at a low‐frequency band and predict RCS data at a high‐frequency band. The numerical demonstration shows that the proposed approach generates an estimation that falls within the acceptable error range.
Compact microstrip low pass filter design using U‐shaped folded high‐impedance line
Authors: Rajput Anil , Patel Kamlesh , Birwal Amit 
Published: May 2018

AbstractA microstrip low pass filter using a U‐shaped folded high impedance line is designed. Comparison with conventional filter has shown almost ripple free pass band and better stop band characteristics in the filter with folded line. Effective optimization of filter dimensions led to smoother and spurious free responses, which are desirable in the radio frequency and microwave systems. Size of overall filter is reduced by 7.5% and 9.02% for third order and fifth order filters, respectively. Both simulated and measured responses of fifth order filter are presented and found in agreement.
A coupled line type of Wilkinson power divider with flexible bandwidth and out‐of‐band rejection performance
Authors: Liu Fu‐Xing , Wang Yang , Lee Jong‐Chul 
Published: May 2018

AbstractIn this letter, a coupled line type of Wilkinson power divider (PD) composed of series transmission lines and coupled lines is proposed. By employing 2 pairs of transmission lines, the difference between the even‐/odd‐mode impedance of the utilized coupled line can be controlled; hence the performance of the bandwidth and out‐of‐band rejection can be changed simultaneously. Detailed design equations are derived and can be easily applied in future works. Due to the inherent bandpass characteristic of the coupled line, DC block is achieved simultaneously. For experimental purpose, a prototype PD with a center frequency of 2.5 GHz is simulated and fabricated, and the measured results show a good agreement with theoretical analysis.
A qualitative study exploring staff attitudes to maintaining hydration in neurosurgery patients
Authors: Litchfield Ian , Magill Lisa , Flint Graham 
Published: May 2018

AbstractAimsTo explore staff perceptions of the processes and influences on maintaining patients’ hydration on a busy neurosurgery ward.BackgroundDehydration continues to be a major concern in the NHS where its avoidance is hindered by complications arising from clinical conditions, poor assessment and documentation of hydration and a lack of staff time to monitor fluid intake. Recent work has explored patient perceptions of hydration care but there has been little conducted recently that has explored those of staff.MethodsSemi‐structured interviews were conducted with staff working on a neurosurgery ward during 2016. We used open‐ended questions to elicit experiences of hydration care and explore factors that influenced the maintenance of hydration in patients.ResultsWe found that staff were aware of the importance of hydration and saw it as a central aspect of the care they provided. A range of staff are involved in the assessment of patients’ hydration requirements and their ability to meet them. Similarly all staff were expected to provide oral fluids for patients able to drink independently. Competing priorities inhibited the time staff could spend providing hydration care which had an impact on the timely and accurate completion of fluid balance charts and meant that relatives were relied on to support patients requiring assistance in drinking.
Cover Image, Volume 74, Issue 6
Authors: Kanapeckas Kimberly L , Tseng Te‐Ming , Vigueira Cynthia C , Ortiz Aida , Bridges William C , Burgos Nilda R , Fischer Albert J , Lawton‐Rauh Amy 
Published: May 2018

The cover image, by Kimberly L Kanapeckas et al., is based on the Research Article Contrasting patterns of variation in weedy traits and unique crop features in divergent populations of US weedy rice (Oryza sativa sp.) in Arkansas and California, DOI: 10.1002/ps.4820. Photo Credit: Amy Lawton‐Rauh.
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Organic Soluble LaPO4:Eu3+ Nanorods: Sensitization of Surface Eu3+ Ions and Phase Transfer in Water
Authors: Vats Bal Govind , Shafeeq Muhammed , Singhal Pallavi , Neogy Suman 
Published: May 2018

AbstractChloroform soluble luminescent undoped and europium doped LaPO4 nanoparticles (NPs) were synthesized by oleic acid mediated solvothermal technique at low temperature (150 °C). These NPs have nanorod (NR) shape as confirmed by Transmission electron microscopy (TEM) and monoclinic phase as confirmed by X‐ray diffraction (XRD) measurement. Fourier transform infrared (FTIR) studies shows that oleic acid is bound to the surface of NRs. The Photoluminscence (PL) spectroscopy suggests that the undoped LaPO4 emits violet blue light when excited by UV‐light due to the surface oleate groups. In the doped NRs, oleate group serves as a sensitizer for the surface Eu3+ ions. In order to increase the emission output of these NRs, 2‐theonoyltrifluoroacetonate (TTA) is used to sensitize the emission of surface Eu3+ ions. PL spectroscopy and lifetime measurements clearly show that sensitization takes place only on the surface of the NRs while the core Eu3+ ions remains unsenesitized. The emission output is increased 33 times as compared to the unsensitized NRs. Further, these NRs were transferred from organic to the aqueous phase by citric acid. The NPs thus obtained are redispersible in water with good colloidal stability. Here, also sensitization of surface europium ions occurs in aqueous solution by TTA ligand. These luminescent organic and water soluble NRs further strengthen the application in the fields of optical display, lighting and bioimaging.
Wet‐Chemical Synthesis of Pd‐Au Core‐Shell Nanoparticles (8 nm): From Nanostructure to Biological Properties
Authors: Rostek Alexander , Breisch Marina , Loza Kateryna , Garcia Paulo R. A. F. , Oliveira Cristiano L. P. , Prymak Oleg , Heggen Marc , Köller Manfred , Sengstock Christina , Epple Matthias 
Published: May 2018

AbstractPd−Au core‐shell nanoparticles with a palladium core (diameter about 5.5 nm) and a gold shell (thickness about 1.7 nm) were wet‐chemically synthesized in an easy water‐based one‐pot synthesis by sequential reduction of Pd2+ and Au3+ with glucose in the presence of poly(N‐vinylpyrrolidone) (PVP). The metals are present in about equal amounts (molar ratio Pd:Au about 2:1) with a clear separation between core and shell. The reaction was monitored in‐situ by small‐angle X‐ray scattering (SAXS), showing the initial growth of the palladium seeds, followed by the epitactic formation of the gold shell. The core‐shell character of the particles was confirmed by high‐resolution scanning transmission electron microscopy (STEM) and energy‐dispersive X‐ray spectroscopy (EDX). However, X‐ray powder diffraction with Rietveld analysis indicated a partial alloying, i. e. a gradual border between the two metals. Cell culture experiments showed no adverse effects on human mesenchymal stem cells (hMSCs) with a Pd−Au nanoparticle concentration (computed as total metal) up to 50 μg mL−1 after 24 h incubation, i. e. the particles can be considered as biologically harmless, even after unintended human exposure.
Electrochemical Water Oxidation Catalysed by CoO‐Co2O3‐Co(OH)2 Multiphase‐Nanoparticles Prepared by Femtosecond Laser Ablation in Water
Authors: Nishi Teppei. , Hayasaka Yuichiro. , Suzuki Tomiko. M. , Sato Shunsuke. , Isomura Noritake. , Takahashi Naoko. , Kosaka Satoru. , Nakamura Takahiro. , Sato Shunichi. , Morikawa Takeshi. 
Published: May 2018

AbstractNanoparticle formation via laser ablation in liquid is known to produce functional materials. However, there have been few applications of this technique to the synthesis of electrochemical catalysts for energy conversion. Herein, we report the detailed effects of femtosecond laser ablation in water on the structure and activity of a catalyst intended to promote the electrochemical oxygen evolution reaction (OER) in association with water oxidation. The femtosecond laser ablation of submicron‐sized Co–CoO particles induced a drastic size reduction (from approximately 500 to 5 nm) to give highly dispersed CoO nanoparticles. X‐ray absorption near edge structure (XANES) and X‐ray diffraction (XRD) data demonstrated that these particles also contained Co3O4 and CoO(OH) but not metallic Co. These 5 nm‐CoO nanoparticles showed higher mass‐based‐activity and lower over‐potential values than those of submicron‐sized Co–CoO during the OER in a nearly neutral solution. XANES data suggest that Co containing Co2O3 and Co(OH)2 formed during the OER functioned as the actual OER catalyst.
Losing by winning: The danger zone of adverse competitor replacement
Authors: Makadok Richard , Ross David Gaddis 
Published: May 2018

Research Summary: We use a formal model, motivated by a case study from the airline industry, to consider an industry structure wherein a firm may find that improving its competitiveness hurts its performance. Specifically, we examine the possibility that a superior incumbent may, by getting stronger, drive a weak rival from the market, and thereby allow a stronger rival to enter in its place. Such “adverse competitor replacement” reduces the profit of the superior incumbent and may even, in an extreme case, cause the superior incumbent to be driven from the market as well. We show that adverse competitor replacement can arise under a rational equilibrium and may become more likely if a firm improves its capability for self‐improvement.Managerial Summary: Managers are consistently advised to improve the competitiveness of their firms and beat the competition. We examine the possibility that beating out the competition may have adverse consequences. Specifically, a strong incumbent may, by getting stronger, outcompete a weaker rival to such an extent that the weaker rival exits the market, thereby creating an open market niche for a stronger rival to enter, in effect, a form of adverse competitor replacement. Competing with this stronger rival may in turn reduce the strong incumbent's profits below what they had been before driving the weak rival out. We illustrate adverse competitor replacement with a case study from the airline industry and discuss implications for a firm's investment in its own competitiveness.
A Transparent and Flexible Capacitive‐Force Touch Pad from High‐Aspect‐Ratio Copper Nanowires with Enhanced Oxidation Resistance for Applications in Wearable Electronics
Authors: Kim Dongkwan , Kwon Jinhyeong , Jung Jinwook , Kim Kyunkyu , Lee Habeom , Yeo Junyeob , Hong Sukjoon , Han Seungyong , Ko Seung Hwan 
Published: May 2018

AbstractCopper nanowires are widely utilized for flexible electronics applications due to their excellent electrical conductivity, mechanical flexibility, and optical transparency with very low material cost. While many previous studies are dedicated to developing effective synthesis routes for copper nanowires, most of them have focused on the control of the morphology including length and diameter rather than synthesis yields. Although many postprocessing methods have been established to make use of the copper nanowires, there still remains crucial weakness in the nanowires against oxidation stability. In this study, a new synthesis method for the morphology control of copper nanowires as well as synthesis yields is introduced. After optimizing of the copper nanowire synthesis, a copper‐nanowire‐based flexible transparent conductor is fabricated as a highly robust electrode by using UV‐curable polyurethane acrylate resin. As a proof‐of‐concept, a flexible transparent capacitive‐force‐detection touch pad is demonstrated. The developed flexible transparent copper nanowire electrode with enhanced oxidation resistance is expected to be applied in various flexible and wearable electronics applications.
An audit of referral time frames for ultrasound screening of developmental hip dysplasia in neonates with a normal antenatal clinical examination
Authors: Burnett Madonna , Rawlings Emma Louise , Reddan Tristan 
Published: May 2018

AbstractIntroductionUltrasound has an established role in the detection of developmental dysplasia of the hip (DDH). Lack of uniformity in the appropriate age to perform studies in at‐risk children with a normal clinical examination at birth exists. Opening a new tertiary paediatric hospital saw a variety of referral time frames for initial screening ultrasound for DDH.MethodsLiterature review and retrospective clinical audit were undertaken. DDH ultrasounds of babies with the following criteria were reviewed: normal clinical examination and one or more risk factors. Patients were followed up via their electronic medical record.ResultsThere were 187 eligible patients: 124 (66.3%) had normal initial scans while 63 (33.7%) were recommended to have a follow‐up scan. Most subnormal results (Graf 2A or lower, laxity and/or less than 50% femoral head coverage) (n = 59, 93.7%) were scanned before 6 weeks of age, only four (6.3%) presented at 5 weeks after birth or later.DiscussionThis study identified a potential for reduction in follow‐up studies through delayed initial ultrasound, improving from 4 to 6 weeks of age, without adverse outcomes. Early screening ultrasounds may result in overdiagnosis of DDH during the maturation process of the neonatal acetabulum, potentially causing anxiety and unnecessary follow‐up.
Material descriptors for photocatalyst/catalyst design
Authors: Wang Xijun , Zhang Guozhen , Yang Li , Sharman Edward , Jiang Jun 
Published: May 2018

Rational design of high‐performance photocatalysts/catalysts is crucial for sustainable development. To achieve this goal, a comprehensive understanding and precise description of structure–performance relationships of photocatalysts/catalysts are highly desirable. While photocatalysis/catalysis involves complex systems and processes, approximate descriptors have been proposed for sorting out simple pictures of complicated structure–performance relationships concerned. In this review, some important descriptors involved in photocatalyst/catalyst design including work function, dipole moment, d‐band center, and Fermi softness are reviewed first with special attention being paid to their working mechanisms and applications. Then strategies of tuning photocatalytic/catalytic performance on the basis of these descriptors are outlined. Finally, challenges and opportunities for photocatalyst/catalyst design based on descriptor control are discussed.This article is categorized under:

Structure and Mechanism > Computational Materials Science
Structure and Mechanism > Reaction Mechanisms and Catalysis
Electronic Structure Theory > Density Functional Theory
Software > Quantum Chemistry
Compressible Navier‐Stokes system with general inflow‐outflow boundary data on piecewise regular domains
Authors: Choe H. J. , Novotný A. , Yang M. 
Published: May 2018

AbstractWe prove existence of weak solutions to the compressible Navier‐Stokes system in barotropic regime (adiabatic coefficient, in three dimensions,in two dimensions) with large velocity prescribed at the boundary and large density prescribed at the inflow boundary of a bounded Lipschitz piecewise regular domain, without any restriction neither on the shape of the inflow/outflow boundaries nor on the shape of the domain. The result applies also to pressure laws that are non‐monotone on a compact portion of the interval [0, ∞).