bluuebunny/crossref_metadata_2025 huggingface dataset:
Freezability biomarkers in bull epididymal spermatozoa
Authors: Ryu Do-Yeal , Song Won-Hee , Pang Won-Ki , Yoon Sung-Jae , Rahman Md Saidur , Pang Myung-Geol
Published: September 2019

Sperm cryopreservation is an important tool for storing genetic traits and assisted reproduction techniques. Several studies have developed semen cryopreservation protocols. However, the sperm proteome is different between ejaculated and epididymal spermatozoa and little is known about cryopreservation effects on epididymal spermatozoa. Therefore, our study aimed to (i) investigate the differences of sperm parameters based on the freezing tolerance of spermatozoa and (ii) identify potential markers to predict the freezability of bull epididymal spermatozoa. Our preliminary study demonstrated that spermatozoa from individual bulls differ in cryopreservation freezability. We categorized spermatozoa into high freezing-tolerant spermatozoa and low freezing-tolerant spermatozoa group based on sperm motility after freezing/thawing. We evaluated several sperm functional parameters, including sperm motility/motion kinematics, sperm speed parameters, viability, mitochondrial activity, and capacitation status. Our results demonstrated that motility, sperm speed parameters, viability, and mitochondrial membrane potential had significant differences between the two groups but motion kinematics and capacitation status did not. In addition, the concentration of three proteins - glutathione s-transferase mu 5, voltage-dependent anion-selective channel protein 2, and ATP synthase subunit beta, differed between both groups. Thus, our research highlighted differences in bull epididymal spermatozoa freezability upon cryopreservation and these proteins might be useful markers to select high freezing-tolerant epididymal spermatozoa.
Author Correction: Visual Field Prediction using Recurrent Neural Network
Authors: Park Keunheung , Kim Jinmi , Lee Jiwoong
Published: September 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
A self-referenced method for determination of patulin by surface-enhanced Raman scattering using gold nanobipyramids as the substrate
Authors: Kang Yan , Gu Hai-Xin , Zhang Xin
Published: September 2019

A 4-MBA probe was employed to detect patulin using gold nanobipyramids as the SERS substrate.
Ultrasensitive detection of transcription factors with a highly-efficient diaminoterephthalate fluorophore via an electrogenerated chemiluminescence strategy
Authors: Fan Zhenqiang , Wang Jianfeng , Hao Nan , Li Yihao , Yin Yuhang , Wang Zepeng , Ding Yuedi , Zhao Jianfeng , Zhang Kai , Huang Wei
Published: September 2019

Herein, we apply electrogenerated chemiluminescence (ECL) based method employing diaminoterephthalate analogue as ECL emitter and hairpin DNA as amplification strategy, for sensitive assay of transcription factors.
Photocontrolled self-assembly of azobenzene nanocontainers in water: light-triggered uptake and release of lipophilic molecules
Authors: Villa Marco , Bergamini Giacomo , Ceroni Paola , Baroncini Massimo
Published: September 2019

A simple azobenzene based photo-surfactant thanks to unique photo-triggerable spontaneous emulsification characteristics, allows a clean, reversible and fatigue resistant uptake and release of small molecules in aqueous solution.
Self-templated synthesis of an orthoformate in,in-cryptand and its bridgehead inversion by dynamic covalent exchange
Authors: Löw Henrik , Mena-Osteritz Elena , von Delius Max
Published: September 2019

We report the template-free dynamic covalent self-assembly of a small orthoformate cryptand, which appears to be driven by the formation of two sets of intramolecular, four-centre hydrogen bonds.
Effects of sputtering deposited homoseed layer microstructures on crystal growth behavior and photoactivity of chemical route-derived WO3 nanorods
Authors: Liang Yuan-Chang , Hung Chen-Shiang
Published: September 2019

The crystal growth properties of hydrothermally derived WO3 nanorods were investigated using various WO3 thin-film seed layers.
Semicoherent growth of single-crystal β-In2S3 layers on InP(111) and InAs(111)
Authors: Takagaki Yukihiko , Jenichen Bernd , Brandt Oliver
Published: September 2019

The (103) surface of β-In2S3 consists of a purely accidental hexagonal-like periodicity despite the tetragonal crystal structure of β-In2S3. β-In2S3 layers grow, as a consequence, semicoherently on the (111) surfaces of InP and InAs due to small lattice mismatches.
Modulation of amyloid β peptide aggregation by hydrophilic polymers
Authors: Evgrafova Zhanna , Voigt Bruno , Roos Andreas H. , Hause Gerd , Hinderberger Dariush , Balbach Jochen , Binder Wolfgang H.
Published: September 2019

Careful balance of hydrophilicity of precisely engineered polymers alters aggregation of the amyloidogenic protein Aβ1–40.
The riddle of the forbidden UV absorption of aqueous nitrate: the oscillator strength of the n → π* transition in NO3− including second order vibronic coupling
Authors: Pedersen Pernille D. , Rasmussen Maria Harris , Mikkelsen Kurt V. , Johnson Matthew S.
Published: September 2019

The environmentally relevant n → π* transition in the nitrate anion is doubly forbidden by symmetry. A simple scheme for including second order vibronic coupling is presented.
DFT/MRCI-R2018 study of the photophysics of the zinc(ii) tripyrrindione radical: non-Kasha emission?
Authors: Heil Adrian , Marian Christel M.
Published: September 2019

The fluorescence of a radical-based emitter has been theoretically investigated after measurements had shown absorption bands to lie below the emission energy. The results of the all-multiplicity DFT/MRCI-R2018 study indicate D3 emission.
Revisiting π backbonding: the influence of d orbitals on metal–CO bonds and ligand red shifts
Authors: Koch Daniel , Chen Yingqian , Golub Pavlo , Manzhos Sergei
Published: September 2019

Stronger C–O bonds are found if metal d-functions are present in carbonyl complexes, contrary to the common understanding of π-backbonding.
Enhanced yield-mobility products in hybrid halide Ruddlesden–Popper compounds with aromatic ammonium spacers
Authors: Venkatesan Naveen R. , Mahdi Ali , Barraza Brian , Wu Guang , Chabinyc Michael L. , Seshadri Ram
Published: September 2019

Two hybrid halide Ruddlesden–Popper compounds using the cation 2-(4-biphenyl)ethylammonium show higher yield-carrier mobility products by time-resolved microwave conductivity than compounds with n-butylammonium cations.
Stability of europium(ii) in aqueous nitrate solutions
Authors: Van de Voorde Michiel , Geboes Bart , Vander Hoogerstraete Tom , Van Hecke Karen , Cardinaels Thomas , Binnemans Koen
Published: September 2019

Investigation of the reduction of Eu3+and the stability of Eu2+in aqueous solutions containing high nitrate salt concentrations.
Biofabrication of supported metal nanoparticles: exploring the bioinspiration strategy to mitigate the environmental challenges
Authors: Parandhaman Thanusu , Dey Manash Deep , Das Sujoy K.
Published: September 2019

Biosynthesis of metal nanoparticles (MNPs) has recently emerged as a novel ecofriendly process for the preparation of supported MNPs to alleviate the environmental challenges.
Improving the analytical performance of pulsed-GD-SFMS for multi-elemental depth profile analysis of heat-treated Zn coatings on extruded aluminium
Authors: Pisonero Jorge , Fandino Jonatan , Nordlien Jan Halvor , Richter Silke , Pfeifer Jens , Quarles C. Derrick , Gonzalez Jhanis , Jakubowski Norbert , Bordel Nerea
Published: September 2019

An improved analytical method based on pulsed glow discharge sector field mass spectrometry is investigated for fast and sensitive multi-elemental depth profiling of heat-treated Zn coatings on extruded aluminium.
Light-inducible activation of cell cycle progression in Xenopus egg extracts under microfluidic confinement
Authors: Bisht Jitender , LeValley Paige , Noren Benjamin , McBride Ralph , Kharkar Prathamesh , Kloxin April , Gatlin Jesse , Oakey John
Published: September 2019

Protein release from microfluidically-confined photodegradable hydrogels allows dynamic cycling of cell-free Xenopus egg extracts, a widely used and biochemically tractable model system.
A novel polyoxometalate-based metal–organic nanotube framework templated by twin-Dawson clusters: synthesis, structure and bifunctional electrocatalytic properties
Authors: Lu Borong , Li Shaobin , Zhang Xiaozhou , Zhang Deqing , Fan Linlin , Yan Eryun , Zhang Yongjuan , Yu Liang
Published: September 2019

A novel polyoxometalate-based metal–organic nanotube framework templated by twin-Dawson clusters was synthesized, which exhibits high-performance bifunctional electrocatalytic activities toward reduction of bromate and oxidation of ascorbic acid.
Diarylethene-based conjugated polymer networks for ultrafast photochromic films
Authors: Fu Qiu-Ting , Yan Xiaodong , Li Tao , Zhang Xin-Yue , He Yue , Zhang Wen-Da , Liu Yong , Li Yunxing , Gu Zhi-Guo
Published: September 2019

Two new diarylethene-based conjugated polymers were synthesized, and their films exhibited ultrafast photochromism properties and excellent fatigue resistance.
Bowl-shaped fluorescent liquid crystals derived from 4-tert butyl calix[4]arene and trans cinnamic acid derivatives
Authors: Sharma Vinay S. , Singh Hemant Kumar , Sharma Anuj S. , Shah Akshara P. , Shah Priyanka A.
Published: September 2019

A new family of bowl-shaped molecules with a calix[4]arene rigid core appended by four-side and two-side substitution with trans 4-n-alkoxy cinnamic acid has been synthesized and well characterized.
Truncated octahedral LiNi0.5Mn1.5O4 with excellent electrochemical properties for lithium-ion batteries prepared by a graphite assisted calcination method
Authors: Wang Peng , Li Hongliang , Wei Yuan , Zhao Dongni , Mao Liping , Cui Xiaoling , Zhang Haiming , Zhou Xinan , Li Shiyou
Published: September 2019

A high-performance truncated octahedron structured LiNi0.5Mn1.5O4 is synthesized by a graphite assisted calcination method, in which the {111} and {100} crystal plane group are meet the requirements of high ratio and long cycling performance.
Self-constructed side-by-side nanofiber photocatalyst via oppositely charged electrospinning and its photocatalytic degradation of rhodamine B
Authors: Chang Guoqing , Ullah Wajid , Li Aike , Das Sandeep K. , Lin Liwei , Wang Xu
Published: September 2019

Fabricating side by side (SBS) nanofibers with two distinct materials using dual spinnerets is challenging because of the formation of bulk heterojunctions, which limits the application of these nanofibers.
Electron transport and ultrafast spectroscopic studies of new methanofullerenes bearing a heteroatom in the exohedral chain
Authors: Naqvi Samya , Vasistha Nikita , Kumar Mahesh , Kumar Rachana
Published: September 2019

Heteroatom-bearing methanofullerenes with exciting photophysical and electron transport properties are shown to be an addition to the variety of fullerene derivatives for use as n-type materials in organic electronics.
C-CoP hollow microporous nanocages based on phosphating regulation: a high-performance bifunctional electrocatalyst for overall water splitting
Authors: Li Wanping , Cheng Gao , Sun Ming , Wu Zhaoxuan , Liu Guanliang , Su Dangsheng , Lan Bang , Mai Shixin , Chen Liya , Yu Lin
Published: September 2019

Clever phosphating adjustment and rich conductive C coating collectively contribute to impressive water splitting performance of C-CoP-1/12.
Surface charged species and electrochemistry of ferroelectric thin films
Authors: Domingo Neus , Gaponenko Iaroslav , Cordero-Edwards Kumara , Stucki Nicolas , Pérez-Dieste Virginia , Escudero Carlos , Pach Elzbieta , Verdaguer Albert , Paruch Patrycja
Published: September 2019

Electrochemistry and surface water redox reactions on Pb(Zr0.2,Ti0.8)O3 ferroelectric thin films as a function of polarization and external electric field, as studied by AP-XPS and KPFM.
Silver-promoted decarboxylative radical addition/annulation of oxamic acids withgem-difluoroolefins: concise access to CF2-containing 3,4-dihydroquinolin-2-ones
Authors: Chen Guojun , Li Chenglong , Peng Jianfeng , Yuan Zeli , Liu Peijun , Liu Xiaozu
Published: September 2019

Described is a silver-promoted decarboxylative radical addition/annulation of oxamic acids withgem-difluoroalkenes enabling the convenient synthesis of various structurally diverse CF2-containing 3,4-dihydroquinolin-2-ones that might find applications in medical chemistry.
A base-promoted cascade reaction of α,β-unsaturated N-tosylhydrazones with o-hydroxybenzyl alcohols: highly regioselective synthesis of N-sec-alkylpyrazoles
Authors: Chen Lian-Mei , Zhao Juan , Xia An-Jie , Guo Xiao-Qiang , Gan Ya , Zhou Chuang , Yang Zai-Jun , Yang Jun , Kang Tai-Ran
Published: September 2019

An efficient method for the synthesis of N-sec-alkylpyrazoles via a cascade reaction of α,β-unsaturated N-tosylhydrazones with ortho-hydroxybenzyl alcohols has been developed.
Caerulomycins from Actinoalloteichus cyanogriseus WH1-2216-6: isolation, identification and cytotoxicity
Authors: Mei Xiangui , Lan Mengmeng , Cui Guodong , Zhang Hongwei , Zhu Weiming
Published: September 2019

SAR study of 42 caerulomycins from A. cyanogriseus revealed that 6-aldoxime and 4-O-glycosidation are respectively essential for their activity and selectivity.
Solution structure of linear battacin lipopeptides – the effect of lengthening fatty acid chain
Authors: Kihara Shinji , De Zoysa Gayan Heruka , Shahlori Rayomand , Vadakkedath Praveen G. , Ryan Timothy M. , Mata Jitendra P. , Sarojini Vijayalekshmi , McGillivray Duncan J.
Published: September 2019

Explaining antimicrobial battacin lipopeptides by investigating the solution structure – the propensity to aggregate may have a role in a declined antimicrobial activity.
Real-time monitoring of stress development during electrochemical cycling of electrode materials for Li-ion batteries: overview and perspectives
Authors: Jangid Manoj K. , Mukhopadhyay Amartya
Published: September 2019

Monitoring stress development in electrodes in-situ provides a host of real-time information on electro-chemo-mechanical aspects as functions of SOC and electrochemical potential.
High performance P2 sodium layered oxides: an in-depth study into the effect of rationally selected stoichiometry
Authors: Ortiz-Vitoriano Nagore , Drewett Nicholas E. , Gonzalo Elena , Acebedo Begoña , Bonilla Francisco J. , López del Amo Juan Miguel , Stansby Jennifer H. , Sharma Neeraj , Lakuntza Oier , Carrasco Javier , Rojo Teófilo
Published: September 2019

Based on our rational approach to stoichiometric selection, we present two high performance Na-ion cathode materials: P2-Na2/3Mn0.9−xNixTi0.05Fe0.05O2 (x = 0.10 and 0.20).
Cu induced low temperature ordering of fct-FePtCu nanoparticles prepared by solution phase synthesis
Authors: Lei Wenjuan , Yu Yongsheng , Yang Weiwei
Published: September 2019

Cu doping can occupy the Fe sites in the FePt lattice, contract c axis and increase atom diffusivity, favoring atoms rearrangement and phase transformation from fcc to fct at lower temperature.
Transient receptor potential ankyrin1 channel is endogenously expressed in T cells and is involved in immune functions
Authors: Sahoo Subhransu Sekhar , Majhi Rakesh Kumar , Tiwari Ankit , Acharya Tusar , Kumar P. Sanjai , Saha Somdatta , Kumar Abhishek , Goswami Chandan , Chattopadhyay Subhasis
Published: September 2019

Transient receptor potential channel subfamily A member 1 (TRPA1) is a non-selective cationic channel, identified initially as a cold sensory receptor. TRPA1 responds to diverse exogenous and endogenous stimuli associated with pain and inflammation. However, the information on the role of TRPA1 toward T-cell responses remains scanty. In silico data suggest that TRPA1 can play an important role in the T-cell activation process. In this work, we explored the endogenous expression of TRPA1 and its function in T cells. By reverse transcription polymerase chain reaction (RT-PCR), confocal microscopy and flow cytometry, we demonstrated that TRPA1 is endogenously expressed in primary murine splenic T cells as well as in primary human T cells. TRPA1 is primarily located at the cell surface. TRPA1-specific activator namely allyl isothiocyanate (AITC) increases intracellular calcium ion (Ca2+) levels while two different inhibitors namely A-967079 as well as HC-030031 reduce intracellular Ca2+ levels in T cells; TRPA1 inhibition also reduces TCR-mediated calcium influx. TRPA1 expression was found to be increased during αCD3/αCD28 (TCR) or Concanavalin A (ConA)-driven stimulation in T cells. TRPA1-specific inhibitor treatment prevented induction of cluster of differentiation 25 (CD25), cluster of differentiation 69 (CD69) in ConA/TCR stimulated T cells and secretion of cytokines like tumor necrosis factor (TNF), interferon γ (IFN-γ), and interleukin 2 (IL-2) suggesting that endogenous activity of TRPA1 may be involved in T-cell activation. Collectively these results may have implication in T cell-mediated responses and indicate possible role of TRPA1 in immunological disorders.
Enduring Cognitive and Linguistic Deficits in Individuals With a History of Concussion
Authors: Stockbridge Melissa D. , Newman Rochelle
Published: September 2019

Purpose

The purpose of this research is to determine whether individuals with a history of concussion retain enduring differences in narrative writing tasks, which necessitate rapid and complex integration of both cognitive and linguistic faculties.

Method

Participants aged 12–40 years old, who did or did not have a remote history of concussion, were recruited to take an online survey that included writing both a familiar and a novel narrative. They also were asked to complete multiple tasks targeting word-level and domain general cognitive skills, so that their performance could be interpreted across these dimensions.

Results

Participants with a concussion history were largely similar to participants with no history of brain injury across tasks that targeted a single skill in isolation. However, participants with prior concussions demonstrated difficulty in providing both key content and details when presented with a novel video and asked to provide a summary of what they had just seen. Number of lifetime concussions predicted the inclusion of key content when summarizing the video. Thus, differences in cognitive and linguistic skills required for written narrative language may continue to be present far after concussion, despite average normative levels of performance on tasks targeting these skills in isolation.

Conclusions

These findings suggest that individuals with a concussion history, particularly a history of multiple concussions, may continue to experience difficulties for a long period after injury and are likely to benefit from more complex and ecologically valid assessment prior to discharge. Individuals with a concussion history who return to full participation in work, school, and recreational activities may continue to benefit from assistance when asked to rapidly acquire and distill novel information, as is often required in academic and professional environments.
Psychosocial Outcomes of Severe Traumatic Brain Injury in Relation to Discourse Recovery: A Longitudinal Study up to 1 Year Post-Injury
Authors: Elbourn Elise , Kenny Belinda , Power Emma , Togher Leanne
Published: September 2019

Purpose

The interrelationship between psychosocial outcomes and discourse after severe traumatic brain injury remains largely unknown. This study examines outcomes relating to work, relationships, and independence within the context of discourse recovery across the 1st year post-injury.

Method

An inception cohort comprising 57 participants with severe traumatic brain injury was assessed at 3, 6, 9, and 12 months post-injury. Outcomes were measured with the Sydney Psychosocial Reintegration Scale–2 (
Tate et al., 2012
;
Tate, Simpson, Loo, & Lane-Brown, 2011
), and discourse was evaluated with Main Concept Analysis of a narrative retell. Correlation and linear regression analyses were utilized.

Results

Significant correlations were found between psychosocial outcomes reported by relatives and discourse performance across the 1st year. The 6-month discourse scores significantly predicted the 12-month psychosocial outcomes reported by relatives. Initial discourse severity and recovery pattern also informed outcomes.

Conclusions

Discourse disorders have a strong relationship with everyday outcomes relating to work, relationships, and independence as reported by relatives. Six months post-injury is a beneficial time for assessment, education, and service planning. Age, years of education, and aphasia may mediate recovery and outcomes. A clinical decision tree is offered to support goal setting.

Supplemental Material

https://doi.org/10.23641/asha.9755444
Distributed path optimisation of mobile sensor networks for AOA target localisation
Authors: Yang Ziwen , Zhu Shanying , Chen Cailian , Guan Xinping , Feng Gang
Published: September 2019

The path optimisation problem of mobile sensor networks for arrival‐of‐angle (AOA) target localisation, using the consensus‐based extended information filter is considered, in this study. A new idea of equipping sensors with information‐driven mobility to improve the estimation accuracy with respect to a stationary target is proposed by the authors. A gradient descent method is used for mobile sensors, which are subject to geometric constraints, to choose the next optimal waypoints. The corresponding optimisation problem is solved in a distributed manner, by selecting a proper cost function for each mobile sensor. It is shown that the boundedness of the estimation error is guaranteed. Moreover, they find that the mobility of sensors does decrease the estimation error bounds compared with the static sensor networks, which is beneficial for the localisation performance. Simulation is carried out to show the effectiveness of the proposed method.
Semi‐fuzzy CMAC and PD hybrid controller with compressed memory and semi‐regularisation for electric load simulator
Authors: Gu Nanhao , Yang Bo
Published: September 2019

Cerebellar model articulation controller (CMAC) and proportional derivative hybrid controller is widely used for torque control in electric load simulator. However, due to some uncertain factors and especially the strong external interference of the surplus torque, the control stability could not be guaranteed. Here, a novel semi‐regularised semi‐fuzzy CMAC is proposed to get an efficient control effect. This study expands the weight smoothing into a semi‐regularisation algorithm, and proves the stability of the hybrid control system based on the stability of the torque motor. To save storage space and reduce computation, the memory space is compressed and a semi‐fuzzy mapping rule is proposed to smooth the output of CMAC with a high calculation speed. Both of simulation and experiment results demonstrate that this novel controller could keep stable and reach a good loading accuracy.
Partially‐coupled least squares based iterative parameter estimation for multi‐variable output‐error‐like autoregressive moving average systems
Authors: Ma Hao , Pan Jian , Ding Feng , Xu Ling , Ding Wenfang
Published: September 2019

This study considers the parameter estimation of a multi‐variable output‐error‐like system with autoregressive moving average noise. In order to solve the problem of the information vector containing unknown variables, a least squares‐based iterative algorithm is proposed by using the iterative search. The original system is divided into several subsystems by using the decomposition technique. However, the subsystems contain the same parameter vector, which poses a challenge for the identification problem, the approach taken here is to use the coupling identification concept to cut down the redundant parameter estimates. In addition, the recursive least squares algorithm is provided for comparison. The simulation results indicate that the proposed algorithms are effective.
Start‐up and recovery method with LCC–HVDC systems participation during AC/DC system black‐starts
Authors: Li Xinwei , Liu Chongru , Lou YuanYuan
Published: September 2019

With the increase in a number of online high‐voltage direct current (HVDC) systems in China, a big question for their use as black‐start and restoration of power system outages arises. Line‐commutated converters (LCC)–HVDC systems can significantly reduce recovery time. The black‐start‐up and recovery conditions for LCC–HVDC systems and the connected AC systems are discussed in this study. The appropriate start‐up and recovery modes are identified and the results of the control characteristics of LCC–HVDC systems are analysed in detail. The stability requirements of AC systems in terms of LCC–HVDC system effects are evaluated. Furthermore, the restoration using LCC–HVDC systems, including the priority sequence index of the multi‐HVDC links and the optimisation model of the mentioned problem, is discussed in detail. Compared to the conventional black‐start strategy, the applicability and effectiveness of the proposed method are illustrated using a part of the actual Guangzhou power system as a test system.
Hybrid methodology to analyse reliability and techno‐economic evaluation of microgrid configurations
Authors: Rana Ankur Singh , Iqbal Fahad , Siddiqui Anwar Shahzad , Thomas Mini Shaji
Published: September 2019

Concerns related to environmental pollution, growing population, fossil fuel depletion, ever‐increasing load demands etc. lead power utilities to rely on renewable energy resources (RERs). The objective of the research is to evaluate the reliability of the microgrid by focussing on the economic and environmental benefits of RERs. Reliability assessment of power network plays an important role to achieve high demands of reliable power supply globally. Reliability assessment helps power utilities in reducing the frequency and the duration of power outages to their customers. In this work, the impact of a stochastic characteristic of photovoltaic system, wind turbine generator system, and battery storage on the overall reliability of the power system are analysed in both the scenarios, i.e. grid‐connected and isolated mode of operation of the microgrid. Various configurations of microgrid based on redundancy levels are considered for reliability evaluation, including common cause outages and miscoordination of protection devices. The effect of addition and removal of different distributed generation units on the overall reliability of the system is analysed using Markov approach. Also, techno‐economic analysis of different reliable configurations is performed to finalise the best possible reliable and economic configuration of the microgrid.
Network reliability framework integrating demand response and flexible OHL ratings
Authors: Abogaleela Mohamed , Kopsidas Konstantinos
Published: September 2019

The need for flexible power networks has become an emerging challenge for network operators. The utilisation of emergency loadings and probabilistic thermal ratings for overhead lines (OHLs) are vital flexible options to the network operators. So far, the impact of the ageing risks associated with such OHLs operation on reliability and the operators’ managing actions to mitigate this impact, have not been thoroughly investigated. This study presents a novel methodology for optimising the available demand response in the network at emergency conditions for minimising the network ageing risks and network expected energy not supplied considering the criticality of an individual line's ageing. This methodology facilitates the analysis of the trade‐off between ageing and reliability. An index, defined as expected equivalent Line ageing, is also formed to quantify the network ageing; this associates the OHL ageing directly with the available demand response at the network busses. A case study on the IEEE RTS‐96 indicated a reduction on the network expected energy not supplied and expected interruption costs by almost 42 and 34%, respectively, while reducing the overall network ageing risk by 58%, enabling operators to extend the end‐of‐life of critical OHLs.
Control of dual converter‐based grid‐tied SPV system with series–shunt compensation capabilities
Authors: Chilipi Rajasekharareddy , Alsayari Naji , Alsawalhi Jamal
Published: September 2019

This study deals with the control and implementation of a dual converter‐based grid‐tied three‐phase solar photovoltaic (SPV) system with series and shunt compensation capabilities. The SPV system consists of two back‐to‐back‐connected voltage‐source converters, namely neutral and shunt converters. The purpose of neutral converter is to provide voltage compensation services. The neutral converter does not use any series transformer to provide voltage compensation and makes use of the distribution transformer available at the site. The shunt converter delivers the solar power to the utility grid and the local loads. Moreover, the shunt converter provides the compensation of harmonic and reactive currents generated by the local loads. A new harmonics detection method and control algorithm are developed using adaptive noise suppression‐based adaptive filters and implemented for the control of dual converter‐based SPV system. The performance and efficacy of the dual converter‐based SPV system and its control are demonstrated using MATLAB‐based simulations and hardware‐in‐the‐loop‐based experiments.
DER adopter analysis using spatial autocorrelation and information gain ratio under different census‐data aggregation levels
Authors: Heymann Fabian , Lopes Mário , vom Scheidt Frederik , Silva João M. , Duenas Pablo , Soares Filipe J. , Miranda Vladimiro
Published: September 2019

Residential consumers have been adopting distributed energy resources (DER) like photovoltaics (PV), electric vehicles (EV) as well as electric heating, ventilation and air conditioning devices (HVAC) in recent years – thus substantially reshaping power systems. This study is dedicated to the analysis of such adopters in continental Portugal, using both spatial analysis tools and census data with information theoretic criteria. Results suggest that the current uptake of EV, PV, and HVAC is characterised by spatially auto‐correlated adoption patterns. The analysis of census variables, on the other hand, reveals that Portuguese EV, PV, and HVAC adopters exhibit a few surprising, unrecorded characteristics compared with previous studies. Comparing different dataset resolutions, EV and HVAC adopters are found to be most similar across all three aggregation levels considered. Results further show that fewer adopter groups tend to own both EV‐HVAC and PV‐HVAC, reducing per se synergy potentials that may arise behind the metre. One of the main outcomes from this work is that studies describing energy technology adopters using census variables might receive very unstable results across different data aggregation levels. This may lead to adverse effects on studies' conclusiveness and energy policy design choices.
Power‐system level classification of voltage‐source HVDC converter stations based upon DC fault handling capabilities
Authors: Judge Paul D. , Chaffey Geraint , Wang Mian , Zerihun Dejene Firew , Beerten Jef , Green Tim C. , Van Hertem Dirk , Leterme Willem
Published: September 2019

To date, numerous concepts for converter station designs for use in voltage source converter (VSC)‐based high‐voltage direct current (HVDC) systems have been proposed. These differ not only in converter circuit topology, sub‐module design, and control scheme but also in AC‐or‐DC switchgear and other auxiliary equipment. In the main, the existing literature categorises these converter stations according to just the converter circuit technologies and controls. However, for the development of network codes and to enable systematic network studies, a system‐focused and technology‐independent classification is needed. As such a classification does not yet exist, this study proposes a new framework, which categorises VSC station designs according to their capabilities during a DC‐side fault and the method by which post‐fault restoration may be achieved, given that these are the main differentiating factors from a system perspective. The classification comprises six converter station types and three time‐intervals through which to fully characterise a design. Many well‐known forms of converters are used as case studies, and simulation results are used to exemplify the classification framework. The outcome is a generic and technology‐independent way of characterising converter station designs that is useful in wider power‐system analysis but also for putting proposed converter stations into context.
Synthesis and characterisation of superhydrophobic CNC/ZnO nanocomposites by using stearic acid
Authors: Zhu Wenkai , Wu Yan , Zhang Yang
Published: September 2019

The synthesis of superhydrophobic materials by using inorganic materials and organic renewable materials is a hot topic in academic research. At present, the methods used to prepare superhydrophobic composites are complicated and the hydrophobic modifiers used are expensive. The authors report a simple and efficient method for the synthesis of superhydrophobic composites. At the beginning, the cellulose nanocrystal (CNC)/ZnO nanocomposites were prepared by mechanical blending method, and the surface micro–nano rough structure was constructed. Then the superhydrophobic CNC/ZnO nanocomposites were obtained by hydrophobic modification with cheap low surface energy substance. The results demonstrate that the inorganic–organic nanocomposites have excellent superhydrophobic properties, which indicates that the inorganic–organic nanocomposites have potential applications as hydrophobic additives in coatings and other fields.
Infrared and sub-mm observations of outbursting young stars with Herschel and Spitzer
Authors: Postel A. , Audard M. , Vorobyov E. , Dionatos O. , Rab C. , Güdel M.
Published: September 2019

Context. Episodic accretion plays an important role in the evolution of young stars. Although it has been under investigation for a long time, the origin of such episodic accretion events is not yet understood.

Aims. We investigate the dust and gas emission of a sample of young outbursting sources in the infrared to get a better understanding of their properties and circumstellar material, and we use the results in a further work to model the objects.

Methods. We used Herschel data, from our PI program of 12 objects and complemented with archival observations to obtain the spectral energy distributions (SEDs) and spectra of our targets. We report here the main characteristics of our sample, focussing on the SED properties and on the gas emission lines detected in the PACS and SPIRE spectra.

Results. The SEDs of our sample show the diversity of the outbursting sources, with several targets showing strong emission in the far-infrared from the embedded objects. Most of our targets reside in a complex environment, which we discuss in detail. We detected several atomic and molecular lines, in particular rotational CO emission from several transitions from J = 38−37 to J = 4−3. We constructed rotational diagrams for the CO lines, and derived in three domains of assumed local thermodynamic equilibrium (LTE) temperatures and column densities, ranging mainly between 0−100 K and 400−500 K. We confirm correlation in our sample between intense CO J = 16−15 emission and the column density of the warm domain of CO, N(warm). We notice a strong increase in luminosity of HH 381 IRS and a weaker increase for PP 13 S, which shows the beginning of an outburst.
Numerical models for the dust in RCW 120
Authors: Rodríguez-González A. , Meliani Z. , Sánchez-Cruces M. , Rivera-Ortiz P. R. , Castellanos-Ramírez A.
Published: September 2019

Context. The interstellar bubble RCW 120 seen around a type O runaway star is driven by the stellar wind and the ionising radiation emitted by the star. The boundary between the stellar wind and interstellar medium (ISM) is associated with the arc-shaped mid-infrared dust emission around the star within the HII region.

Aims. We aim to investigate the arc-shaped bow shock in RCW 120 by means of numerical simulations, including the radiation, dust, HII region, and wind bubble.

Methods. We performed 3D radiation-hydrodynamic simulations including dust using the GUACHO code. Our model includes a detailed treatment of dust grains in the ISM and takes into account the drag forces between dust and gas and the effect of radiation pressure on the gas and dust. The dust is treated as a pressureless gas component. The simulation uses typical properties of RCW 120. We analyse five simulations to deduce the effect of the ionising radiation and dust on both the emission intensity and the shape of the shock.

Results. The interaction of the wind and the ionising radiation from a runaway star with the ISM forms an arc-shaped bow shock where the dust from the ISM accumulates in front of the moving star. Moreover, the dust forms a second small arc-shaped structure within the rarefied region at the back of the star inside the bubble. In order to obtain the decoupling between the gas and the dust, it is necessary to include the radiation-hydrodynamic equations together with the dust and the stellar motion. In this work all these elements are considered together, and we show that the decoupling between gas and dust obtained in the simulation is in agreement with the morphology of the infrared observations of RCW 120.
Improved enhanced Fritz John condition and constraints qualifications using convexificators
Authors: Khare Abeka , Nath Triloki
Published: September 2019

In this paper, we use the concept of convexificators to derive enhanced Fritz John optimality condition for nonsmooth optimization problems having equality, inequality and abstract set constraint, where involved functions admit convexificators. This necessary optimality condition provides some more information about the extremal point in terms of converging sequences towards it. Then we employ this optimality condition to study enhanced Karush–Kuhn–Tucker (KKT) condition and to define associated ∂*-pseudonormality and ∂*-quasinormality concepts in terms of convexificators. Later, sufficiency for ∂*-pseudonormality and some more results based on these concepts are investigated.
ADHS und hochfunktionale Autismus-Spektrum-Störungen
Authors: Schöttle Daniel , Schimmelmann Benno G. , van Elst Ludger Tebartz
Published: September 2019

ADHS und ASS sind früh beginnenden neuronale Entwicklungsstörungen, die häufig gemeinsam vorkommen. Sie haben anteilig eine gemeinsame genetische Grundlage, die sich sowohl in der Auftretenswahrscheinlichkeit beim selben Individuum als auch in den Familien der Betroffenen zeigt. Die Unterscheidung, um welche Störung es sich handelt oder ob diese als Komorbidität vorliegt, erfordert eine genaue diagnostische Längsschnittuntersuchung unter Einbeziehung von möglichst viel Fremdinformation. Die psychopharmakologische Behandlung der ADHS ist ähnlich wie beim alleinigen Vorliegen einer ADHS, allerdings sollten die eingesetzten Substanzen zunächst in deutlich niedrigerer Dosierung begonnen und nach Klinik gesteigert werden.
THADA_rs13429458 Minor Allele Increases the Risk of Polycystic Ovary Syndrome in Asian, but Not in Caucasian Women: A Systematic Review and Meta-Analysis
Authors: Park Sunmin , Liu Meiling , Zhang Ting
Published: September 2019

Polycystic ovary syndrome (PCOS) is a highly prevalent disease in young women that also features increased insulin resistance. Genetic factors have a strong relationship with the etiology of PCOS. We assessed whether carrying THADA rs13429458 is associated with the development of PCOS by meta-analysis and whether the association is influenced by ethnicity. Articles were searched using PubMed, EMBASE, Cochrane Library, Korean scientific database, and Chinese and Indian medical databases to identify all eligible studies for evaluating the association of THADA rs13429458 and PCOS risk. The association was assessed in five genetic random effects models including the allelic (AG), recessive (RG), dominant (DG), homozygous (HMG), and heterozygous (HTG) genetic models. Subgroup analyses stratified by ethnicity (Asians and non-Asians) were assessed. Nine articles were selected and 1 association analysis of Korea PCOS study met Hardy–Weinberg equilibrium criteria. A set of 38 224 PCOS women and 120 173 healthy women were included. The AG and RG showed heterogeneity in the overall and Asian subjects, but the other genetic model did not exhibit heterogeneity in all subjects. AG, RG, DG, and HMG, but not HTG, exhibited publication bias in total subjects but there was no publication bias in all genetic models among Asians and non-Asians. The overall effect of THADA_rs13429458 on PCOS risk showed significant positive associations in pooling 10 studies. In sub-group analysis only Asians, but not non-Asians, had a positive association (AG: OR=1.24, p=0.001; RG: OR=1.32, p=0.002; DG: OR, 1.70, p<0.00001; HMG: OR, 1.71, p=0.002; HTG: OR=1.34, p=0,006). In conclusions, young Asian women with the minor allele (C) for THADA rs13429458 were at increased risk of PCOS.
Internationale Pflegekräfte in deutschen
Kliniken
Authors: Eßrich Marie-Luise , Wegmann Rita
Published: September 2019

Nicht erst durch den Pflegekräftemangel kommen auch aus dem Ausland Pflegekräfte
nach Deutschland, die auf den Intensivstationen der Kliniken eingesetzt werden.
Für die einen ist es eine Bereicherung, wie Marie-Luise Eßrich schreibt. Andere
bemängeln die unzureichenden Voraussetzungen, die internationale Pflegekräfte
oft mitbringen, gerade auch sprachlich, wie Rita Wegmann ausführt.
Flut, Fluch oder Segen?
Authors: Zoller Richard , Nositschka Jan
Published: September 2019

Wie nehmen Intensivpflegekräfte die Alarme auf der Intensivstation wahr? Werden
sie eher als hilfreich oder als störend empfunden? Sind es zu viele oder eher zu
wenige? Und verändert sich die Wahrnehmung ja nach Alter der Pflegekräfte? All
diesen Fragen ist das Autorenteam in einer Untersuchung auf den
Intensivstationen des Uniklinikums Bonn nachgegangen – mit teilweise
überraschenden Ergebnissen.
Interdisziplinäre Empfehlungen zur Behandlung des metastasierten Nierenzellkarzinoms
Authors: Miller Kurt , Bergmann Lothar , Doehn Christian , Gschwend Jürgen E. , Kuczyk Markus A.
Published: September 2019

Die Prognose von Patienten mit metastasiertem Nierenzellkarzinom (mRCC) hat sich dank neuer Therapien deutlich verbessert. Überlebenszeiten von mehr als zwei Jahren sind realistisch. Immuntherapien mit Checkpoint-Inhibitoren haben das Therapiespektrum in der Erst- und Zweitlinientherapie erweitert.

Sunitinib, Pazopanib, Tivozanib und die Kombination Bevacizumab + Interferon-alpha sind unabhängig vom Risikoscore für die Erstlinientherapie beim mRCC zugelassen. Für die Kombination Nivolumab + Ipilimumab sowie für Cabozantinib ist die Zulassung jeweils auf Patienten mit intermediärem und hohem Progressionsrisiko beschränkt. Die Immuntherapie war bez. des Gesamtüberlebens in dieser Subgruppe signifikant wirksamer als Sunitinib. Temsirolimus ist nur für Hochrisikopatienten zugelassen.

Sunitinib und Pazopanib haben eine Zulassung auch für die Zweitlinientherapie – bei Pazopanib gilt diese für den Einsatz nach Zytokinen. Für Nivolumab und Cabozantinib wurde in der Zweitlinientherapie ein signifikanter Überlebensvorteil gegenüber Everolimus gezeigt. Die Kombination Lenvatinib + Everolimus sowie Axitinib sind weitere für die Zweitlinie zugelassene Substanzen. Everolimus als Monotherapie ist durch die neuen Optionen in der Zweitlinie abgelöst worden.

Bei zunehmender Anzahl verfügbarer Therapien ist die Frage nach der optimalen Sequenztherapie weiterhin offen.

Ziel eines interdisziplinären RCC-Expertengesprächs war es, gemeinsame Therapieempfehlungen auf Basis der aktuell publizierten Daten und der eigenen klinischen Erfahrung für den Praxisalltag abzuleiten. Die Ergebnisse werden in dieser Publikation vorgestellt.
Biologie als Schicksal? Kommentar zu „Wie viele
Geschlechter gibt es und kann man sie wechseln?“ aus wissenschafts- und
gesellschaftstheoretischer Perspektive
Authors: Bauer Robin
Published: September 2019

Der Kommentar analysiert im ersten Teil das Wissenschaftsverständnis, das dem
Beitrag von Ponseti und Stirn (2019) zugrunde
liegt. Es wird entgegen dem Paradigma einer wertneutralen Wissenschaft
argumentiert, dass die Erzeugung wissenschaftlichen Wissens im
sozio-historischen und politischen Kontext gesehen werden muss, und dargelegt,
inwiefern der Beitrag von Ponseti und Stirn auch eine politische Intervention
darstellt. Der dem Artikel inhärente biologische Determinismus wird
problematisiert. Im zweiten Teil wird argumentiert, dass Trans*Identitäten nur
im gesellschaftlichen Kontext zu verstehen sind, vor allem in Bezug auf die
wirkmächtige Norm der Zweigeschlechtlichkeit sowie die institutionellen
Rahmenbedingungen eines Transitionsprozesses. Die Vielfalt der Strategien von
Trans*Personen im Umgang mit ihren nicht normkonformen Selbstbildern wird
Ponseti und Stirns Engführung aus der Begutachtungspraxis entgegengestellt.
Kommentar zu „Wie viele Geschlechter gibt es und kann man
sie wechseln?“ aus biologischer Perspektive
Authors: Voß Heinz-Jürgen
Published: September 2019

Als promovierter Biologe gibt der Autor von „Making Sex Revisited: Dekonstruktion
des Geschlechts aus biologisch-medizinischer Perspektive“ (2010) einen Überblick
über die biologische Forschung zu Geschlecht. Unhinterfragte
Zweigeschlechtlichkeit wird als Gender-Ideologie dargelegt, indem eine
differenzierte biologische Sichtweise auf Geschlecht aufgezeigt wird. Auch wird
argumentiert, dass die Fortpflanzungsfähigkeit des Genitaltrakts nicht
lebensnotwendig ist, sodass Varianz hier ebenso möglich ist wie bei sexuellen
Lebensweisen.
Wie viele Geschlechter gibt es und kann man sie
wechseln?
Authors: Ponseti Jorge , Stirn Aglaja
Published: September 2019

Die Aufteilung des Menschen in zwei Geschlechter wurde in jüngerer Vergangenheit
kritisiert, da es keine genaue Grenze zwischen beiden Geschlechtern gebe und
weil die Vorstellung von der Existenz zweier Geschlechter selbst das Ergebnis
eines sozialen Konstruktionsprozesses sei. Daher sei Geschlecht etwas, was eine
Person nur für sich bestimmen könne, folglich
Transsexualität/Geschlechtsdysphorie keine psychische Störung und die Ansprüche
der Betroffenen nach selbstbestimmter Wahl geschlechtsangleichender Maßnahmen
legitim.

In der vorliegenden Arbeit wird die klassische Auffassung der
Zweigeschlechtlichkeit durch die Fortpflanzungsfunktion begründet. Die
Unterschiedlichkeit von Samen- und Eizelle (Anisogamie) hat weitreichende
Konsequenzen für die Lebenswirklichkeit des Menschen und begründet
geschlechtstypische Verhaltensneigungen und Geschlechtsrollen. Der aktuelle
Begriff Geschlechtsidentität wird kritisiert und einem anderen
Identitätskonzept, das therapeutische Anknüpfungspunkte bietet,
gegenübergestellt. Ferner wird erläutert, wie sich die Kritik am klassischen
Geschlechtsbegriff nachteilig für die Sexualwissenschaft sowie auch für die
Therapie geschlechtsdysphorischer Menschen auswirkt. Die Annahme, dass eine
Psychotherapie der Geschlechtsdysphorie unethisch ist, wird diskutiert und den
Ergebnissen neuerer Katamnesestudien gegenübergestellt. Unter Berücksichtigung
neurowissenschaftlicher Studien werden Vorschläge für eine neue
psychotherapeutische Strategie gemacht.