bluuebunny/crossref_metadata_2025 huggingface dataset:
A conductive liquid-based surface acoustic wave device
Authors: Nam Jeonghun , Lim Chae Seung
Published: August 2016

We show a simpler and more cost-effective method for generating surface acoustic waves using eutectic gallium indium as a conductive liquid which can replace conventional patterned metal electrodes.
Comparative lipidomic study of urothelial cancer models: association with urothelial cancer cell invasiveness
Authors: Yu Yang , Skočaj Matej , Kreft Mateja Erdani , Resnik Nataša , Veranič Peter , Franceschi Pietro , Sepčić Kristina , Guella Graziano
Published: August 2016

A joint NMR/LC-MS approach allows to establish significant differences in the lipidoma of invasive urothelial carcinoma cells (T24) with respect to noninvasive urothelial cells (RT4).
Construction and comparison of the statistical coil states of unfolded and intrinsically disordered proteins from nearest-neighbor corrected conformational propensities of short peptides
Authors: Schweitzer-Stenner Reinhard , Toal Siobhan E.
Published: August 2016

Assessing the influence of nearest neighbors on the conformational ensemble of amino acid residues in unfolded and intrinsically disordered proteins and peptides is pivotal for a thorough understanding of the statistical coil state of unfolded proteins as well as of the energetics of the folding process.
Horizontal carbon nanotube alignment
Authors: Cole Matthew T. , Cientanni Vito , Milne William I.
Published: August 2016

The current state-of-the-art in the production of horizontally aligned carbon nanotubes is herein reviewed.
Effective one-pot multienzyme (OPME) synthesis of monotreme milk oligosaccharides and other sialosides containing 4-O-acetyl sialic acid
Authors: Yu Hai , Zeng Jie , Li Yanhong , Thon Vireak , Shi Baojun , Chen Xi
Published: August 2016

Chemoenzymatic synthesis:Monotreme milk glycans and other sialosides containing a 4-O-acetyl-sialic acid were synthesized in a gram or preparative scales using a one-pot two-enzyme sialylation system containing bacterial CMP-sialic acid synthetase and sialyltransferase PmST3.
Electrospun carbon nanofiber@CoS2core/sheath hybrid as an efficient all-pH hydrogen evolution electrocatalyst
Authors: Gu Huahao , Huang Yunpeng , Zuo Lizeng , Fan Wei , Liu Tianxi
Published: August 2016

CNF@CoS2hybrids with a core/sheath hierarchical structure have been successfully fabricated for use as efficient all-pH HER electrocatalysts.
TfOH-mediated [2 + 2 + 2] cycloadditions of ynamides with two discrete nitriles: synthesis of 4-aminopyrimidine derivatives
Authors: Chen Ping , Song Cai-xia , Wang Wan-shu , Yu Xue-liang , Tang Yu
Published: August 2016

In this study, a concise and atom-economical TfOH-mediated [2 + 2 + 2] cycloaddition of ynamides with two discrete nitriles is developed to synthesize multi-substituted 4-aminopyrimidine.
Effects of ionic structures on shear thickening fluids composed of ionic liquids and silica nanoparticles
Authors: Qin Jianbin , Zhang Guangcheng , Ma Zhonglei , Li Jiantong , Zhou Lisheng , Shi Xuetao
Published: August 2016

Shear thickening fluids (STFs) are energy dissipative materials and affected significantly by the properties of the dispersing media.
Adjusting the stability of plasma treated superhydrophobic surfaces by different modifications or microstructures
Authors: Liu Jiyu , Chen Faze , Zheng Huanxi , Liu Shuo , Sun Jing , Huang Shuai , Song Jinlong , Jin Zhuji , Liu Xin
Published: August 2016

Different time stabilities of plasma-induced hydrophilicity and wettability patterns have been realized by dissimilar microstructures.
Hydrogenated group-IV binary monolayers: a new family of inversion-asymmetric topological insulators
Authors: Zhang Shou-juan , Ji Wei-xiao , Zhang Chang-wen , Li Sheng-shi , Li Ping , Ren Miao-juan , Wang Pei-ji
Published: August 2016

Band topology and Rashba spin splitting (RSS) are two extensively explored exotic properties in condensed matter physics.
Solution-processed CdS quantum dots on TiO2: light-induced electrochemical properties
Authors: Sankapal Babasaheb R. , Salunkhe Dipak B. , Majumder Sutripto , Dubal Deepak P.
Published: August 2016

Schematic of CdS-sensitized mesoporous TiO2 nanoparticles thin films along with their energy level diagram.
Fabrication and covalent modification of highly chelated hybrid material based on silica-bipyridine framework for efficient adsorption of heavy metals: isotherms, kinetics and thermodynamics studies
Authors: Radi Smaail , Tighadouini Said , Bacquet Maryse , Degoutin Stéphanie , Janus Ludovic , Mabkhot Yahia N.
Published: August 2016

Adsorbent materials are essential in clean-up processes.
Binuclear iron carbonyl complexes of thialene
Authors: Jin Rong , Chen Xiaohong , Du Quan , Feng Hao , Xie Yaoming , King R. Bruce , Schaefer Henry F.
Published: August 2016

The low energy (thialene)Fe2(CO)6 structure has an η4,η4-thialene ligand bonded to two Fe(CO)3 units. The low-energy (thialene)Fe2(CO)5 structure has an η5,η3 thialene ligand bonded to an Fe2(CO)5 unit. Sulfur is not involved in ligand-metal bonding.
Bio-based (co)polylactide-urethane networks with shape memory behavior at body temperature
Authors: Shi Shuo , Wu Qing-Yun , Gu Lin , Zhang Kunyu , Yu Haibin
Published: August 2016

The novel bio-based polymer networks with shape memory behavior were synthesized from polylactide-based tetraols and hexamethylene diisocyanate trimer.
Highly sensitive potentiometric sensors for thorium ions detection using morpholine derivative self-assembled on silver nanoparticles
Authors: Akl Zeinab F. , Ali Tamer Awad
Published: August 2016

Potentiometric screen-printed electrodes were constructed for Th(iv) determination in water samples. The optimized electrodes exhibited fast response time, wide linear range, low detection limit and high selectivity towards Th(iv) ions.
Revealing the unfavorable role of superfluous CH3NH3PbI3 grain boundary traps in perovskite solar cells on carrier collection
Authors: Du Yangyang , Cai Hongkun , Wen Hongbin , Wu Yuxiang , Li Zhenglong , Xu Jian , Huang Like , Ni Jian , Li Juan , Zhang Jianjun
Published: August 2016

In this work, the perovskite films with controllable grain size are obtained by a facile method. And the unfavorable role of perovskite grain boundary traps is unveiled by the combination of experiment and simulation analysis.
Thermoluminescence kinetic features of Eu3+ doped strontium pyrophosphate after beta irradiation
Authors: Patel Nimesh P. , Verma Vishwnath , Modi Dhaval , Murhty K. V. R. , Srinivas M.
Published: August 2016

Strontium pyrophosphate (Sr2P2O7) doped with various concentrations of Eu3+ as a doping agent is synthesized using a combustion method and to study the thermoluminescence dosimetry [TLD] and applications.
Modeling study on the catalytic activities of 2-imino-1,10-phenanthrolinylmetal (Fe, Co, and Ni) precatalysts in ethylene oligomerization
Authors: Yang Wenhong , Ma Zhifeng , Sun Wen-Hua
Published: August 2016

The variations of activities for polyethylene catalyst analogues were investigated quantitatively through the change of four parameters in MLRA.
Innovative self-sterilizing transparent Fe–phosphate polyethylene films under visible light
Authors: Rtimi Sami , Gulin Alexander , Sanjines Rosendo , Pulgarin Cesar , Nadtochenko Victor , Kiwi John
Published: August 2016

An account of stable, uniform and adhesive high-density polyethylene terephthalate Fe–phosphate (FeOx–POx–HDPET) sputtered thin films showing absorption in the visible region up to 700 nm compared to POx presenting absorption below 300 nm.
Highly mesoporous CsTaWO6via hard-templating for photocatalytic hydrogen production
Authors: Weiss M. , Waitz S. , Ellinghaus R. , Weller T. , Marschall R.
Published: August 2016

Mesoporous CsTaWO6 for photocatalytic hydrogen production has been prepared via hard-templating with a surface area of up to 115 m2 g−1.
Anti-inflammatory labdane-type diterpenoids from Physalis angulata
Authors: Sun Cheng-Peng , Yuan Ting , Wang Lei , Kang Ning , Zhao Feng , Chen Li-Xia , Qiu Feng
Published: August 2016

Twelve new labdane-type diterpenoid glycosides were isolated from the stems and leaves of P. angulata.
Visible light assisted electro–photo synergistic catalysis of heterostructured Pd–Ag NPs/graphene for methanol oxidation
Authors: Li Zhongshui , Ye Lingting , Wang Yanli , Xu Shuhong , Lei Fengling , Lin Shen
Published: August 2016

Heterostructured Pd-Ag/GNs catalytic performances for MOR are significantly improved by visible light irradiation: (a) without irradiation, (b) under irradiation.
DFT-based study on the mechanisms of the oxygen reduction reaction on Co(acetylacetonate)2supported by N-doped graphene nanoribbon
Authors: Wang Nan , Liu Yuejie , Zhao Jingxiang , Cai Qinghai
Published: August 2016

The hybridization of Co(acac)2with N-doped graphene can give rise to outstanding catalytic performance for ORR in fuel cells.
Efficient access to l-phenylglycine using a newly identified amino acid dehydrogenase from Bacillus clausii
Authors: Cheng Jun , Xu Guochao , Han Ruizhi , Dong Jinjun , Ni Ye
Published: August 2016

An amino acid dehydrogenase from Bacillus clausii (BcAADH) was identified and overexpressed in Escherichia coli BL21(DE3) for the preparation of l-phenylglycine from benzoylformic acid.
Sulfur nanoparticles in situ growth on TiO2 mesoporous single crystals with enhanced solar light photocatalytic performance
Authors: Dong Chencheng , Song Hui , Zhou Yi , Dong Chunyang , Shen Bin , Yang Hua , Matsuoka Masaya , Xing Mingyang , Zhang Jinlong
Published: August 2016

Sulfur nanoparticles in situ growth on TiO2 mesoporous single crystals with the narrowed band gap, and the coupling effect between sulfur and TiO2 is responsible for the enhancement of solar light photocatalytic performance.
Facile synthesis of carbon-doped graphitic C3N4@MnO2 with enhanced electrochemical performance
Authors: Shan Qian Yuan , Guan Bo , Zhu Shi Jin , Zhang Hai Jun , Zhang Yu Xin
Published: August 2016

Exploiting the synergistic advantages of two dimensional architectures, carbon-doped graphitic carbon nitride (CCN) and MnO2 were coupled to design a highly efficient carbon-doped graphitic carbon nitride@MnO2 (CCNM) composite for supercapacitors.
Differential role of PVP on the synthesis of plasmonic gold nanostructures and their catalytic and SERS properties
Authors: Verma Manoj , Kedia Abhitosh , Newmai M. Boazbou , Kumar P. Senthil
Published: August 2016

Differential role of PVP modified with halide ions has been meticulously studied for in situ tuning of Au nanoparticle growth utilizing XRD measurements together with FTIR data, thus quantifying their catalysis and SERS applications.
Aryl-fused tetrathianaphthalene (TTN): synthesis, structures, properties, and cocrystals with fullerenes
Authors: Sun Yantao , Cui Zili , Chen Lichuan , Lu Xiaofeng , Wu Yuewei , Zhang Hao-Li , Shao Xiangfeng
Published: August 2016

A library of aryl-fused TTN has been synthesized to show shape complementary with fullerene molecules and form “TTN·fullerene” cocrystals.
A miniature CSTR cascade for continuous flow of reactions containing solids
Authors: Mo Yiming , Jensen Klavs F.
Published: August 2016

Continuous handling of solids creates challenges for realizing continuous production of pharmaceuticals and fine chemicals.
Serine promoted synthesis of peptide thioester-precursor on solid support for native chemical ligation
Authors: Elashal Hader E. , Sim Yonnette E. , Raj Monika
Published: August 2016

Fmoc solid phase peptide synthesis of peptide thioesters by displacement of the cyclic urethane moiety obtained by the selective activation of C-terminal serine.
A novel route for preparing 5′ cap mimics and capped RNAs: phosphate-modified cap analogues obtained via click chemistry
Authors: Walczak Sylwia , Nowicka Anna , Kubacka Dorota , Fac Kaja , Wanat Przemyslaw , Mroczek Seweryn , Kowalska Joanna , Jemielity Jacek
Published: August 2016

A different approach for synthesizing 5′ cap mimics to yield a novel class of dinucleotide cap analogues containing a triazole ring within the oligophosphate chain.
Ru–protein–Co biohybrids designed for solar hydrogen production: understanding electron transfer pathways related to photocatalytic function
Authors: Soltau Sarah R. , Dahlberg Peter D. , Niklas Jens , Poluektov Oleg G. , Mulfort Karen L. , Utschig Lisa M.
Published: August 2016

Two ruthenium-protein-cobaloxime biohybrids produce photocatalytic hydrogen through different catalytic pathways characterized by EPR and transient optical spectroscopies.
Photochromic Torsional Switch (PTS): a light-driven actuator for the dynamic tuning of π-conjugation extension
Authors: Maciejewski Jan , Sobczuk Adam , Claveau Alexis , Nicolai Adrien , Petraglia Riccardo , Cervini Luca , Baudat Emilie , Miéville Pascal , Fazzi Daniele , Corminboeuf Clemence , Sforazzini Giuseppe
Published: August 2016

The conjugation of a bithiophene was reversibly modulated over several cycles through the isomerization of an azobenzene.
Power-free water pump based on a superhydrophobic surface: generation of a mushroom-like jet and anti-gravity long-distance transport
Authors: Huang Shuai , Song Jinlong , Lu Yao , Lv Cunjing , Zheng Huanxi , Liu Xin , Jin Zhuji , Zhao Danyang , Carmalt Claire J. , Parkin Ivan P.
Published: August 2016

A self-capturing phenomenon was investigated to design an integrated antigravity transport system based on a superhydrophobic surface.
Origins of phase separation in thermoelectric (Ti, Zr, Hf)NiSn half-Heusler alloys from first principles
Authors: Page Alexander , Van der Ven Anton , Poudeu P. F. P. , Uher Ctirad
Published: August 2016

First principles calculations were used to create a pseudo-ternary phase diagram of the (Hf1−x−yZryTix)NiSn composition space.
A novel electroactive λ-MnO2/PPy/PSS core–shell nanorod coated electrode for selective recovery of lithium ions at low concentration
Authors: Du Xiao , Guan Guoqing , Li Xiumin , Jagadale Ajay D. , Ma Xuli , Wang Zhongde , Hao Xiaogang , Abudula Abuliti
Published: August 2016

A novel electroactive Li+ ion-imprinted hybrid film consisting of λ-MnO2/PPy/PSS core–shell nanorods is successfully fabricated on an electrode by using the unipolar pulse electrodeposition (UPED) technique.
Unusual photocatalytic materials with UV-VIS-NIR spectral response: deciphering the photothermocatalytic synergetic effect of Pt/LaVO4/TiO2
Authors: Fang Jialin , Li Danzhen , Shao Yu , Hu Junhua
Published: August 2016

In the present paper, we propose a new type of catalyst, Pt/LaVO4/TiO2 (PLVT), which combines the use of UV and visible light for photocatalysis on LaVO4/TiO2 (LVT) and the heating effect of infrared light for low-temperature thermocatalysis on Pt.
Nanostructured metal phosphide-based materials for electrochemical energy storage
Authors: Wang Xia , Kim Hee-Min , Xiao Ying , Sun Yang-Kook
Published: August 2016

This study summarizes nanostructured metal phosphide-based materials for battery and supercapacitor applications and the recent progress, and provides the challenges and future research trends of nanostructured metal phosphide-based materials in electrochemical energy storage applications.
Folate grafted thiolated chitosan enveloped nanoliposomes with enhanced oral bioavailability and anticancer activity of docetaxel
Authors: Sohail Muhammad Farhan , Javed Ibrahim , Hussain Syed Zajif , Sarwar Shoaib , Akhtar Sohail , Nadhman Akhtar , Batool Salma , Irfan Bukhari Nadeem , Saleem Rahman Shah Zaib , Hussain Irshad , Shahnaz Gul
Published: August 2016

Folate grafted and thiolated chitosan coated nanoliposomes were evaluated to improve the oral absorption and targeted pharmacological activity of docetaxel.
Overcoming multidrug resistance by a combination of chemotherapy and photothermal therapy mediated by carbon nanohorns
Authors: Wang Junling , Wang Ran , Zhang Fangrong , Yin Yajun , Mei Leixia , Song Fengjuan , Tao Mingtao , Yue Wanqing , Zhong Wenying
Published: August 2016

A targeted drug delivery system based on carbon nanohorns for targeting P-glycoprotein and delivering etoposide into cells to overcome multidrug resistance.
Hexagonal boron nitride nanoplates as emerging biological nanovectors and their potential applications in biomedicine
Authors: Lu Tun , Wang Libo , Jiang Ye , liu Qiuwen , Huang Caijin
Published: August 2016

Colloidal h-BN nanoplates act as a good nanovector to covalently load a model protein BSA and enhance the immunocompetence of BSA in mice, showing promise as an immunostimulating adjuvant.
A designed synthesis of multifunctional Fe3O4@carbon/zinc phosphate nanoparticles for simultaneous imaging and synergic chemo-photothermal cancer therapy
Authors: Wang Chunyan , Zhang Lingyu , Li Shengnan , Zhang Manjie , Wang Tingting , Li Lu , Wang Chungang , Su Zhongmin
Published: August 2016

A simple method is developed to synthesize Fe3O4@C/ZnP NPs for simultaneous MRI and synergic chemo-photothermal therapy.
A crystalline and free-standing silver thiocarboxylate thin-film showing high green to yellow luminescence
Authors: Troyano Javier , Castillo Óscar , Amo-Ochoa Pilar , Fernández-Moreira Vanesa , Gómez-García Carlos J. , Zamora Félix , Delgado Salomé
Published: August 2016

The simple direct synthesis of Cu(ii) and Ag(i) salts and thiobenzoic acid under ambient conditions allows the preparation of two bidimensional coordination polymers [M(TB)]n (TB = thiobenzoate; M = Cu (1) or Ag (2)).
Schottky junctions on perovskite single crystals: light-modulated dielectric constant and self-biased photodetection
Authors: Shaikh Parvez A. , Shi Dong , Retamal Jose Ramon Duran , Sheikh Arif D. , Haque Md. Azimul , Kang Chen-Fang , He Jr-Hau , Bakr Osman M. , Wu Tom
Published: August 2016

Schottky-junctions formed on hybrid perovskite CH3NH3PbBr3 single crystals show significant light-induced tuning of dielectric constant and self-biased photodetection.
A surface oxide thin layer of copper nanowires enhanced the UV selective response of a ZnO film photodetector
Authors: Teng Feng , Zheng Lingxia , Hu Kai , Chen Hongyu , Li Yanmei , Zhang Zhiming , Fang Xiaosheng
Published: August 2016

A UV detector with a high UV-visible rejection ratio achieved by a warped Schottky junction between Cu NWs and ZnO.
The Graduate Dysphagia Course: Opening the Door to New Frontiers
Authors: Ball Karen A. , Riquelme Luis F.
Published: August 2016

A graduate-level course in dysphagia is an integral part of the graduate curriculum in speech-language pathology. There are many challenges to meeting the needs of current graduate student clinicians, thus requiring the instructor to explore alternatives. These challenges, suggested paradigm shifts, and potential available solutions are explored. Current trends, lack of evidence for current methods, and the variety of approaches to teaching the dysphagia course are presented.
The Development and Impact of a University-Based Dysphagia Research Clinic in the Education of Graduate Students
Authors: Wagner Elise M. , Malandraki Georgia A.
Published: August 2016

Across settings, an increasing number of speech-language pathologists (SLPs) are evaluating and treating dysphagia in patients of all ages. For many students, though, there are few opportunities in an academic setting to apply the knowledge learned in coursework and to develop the hands-on skills needed to become competent clinicians in dysphagia management. For this reason, our team developed a prototype Dysphagia Research Clinic (DRC) at Teachers College of Columbia University. This article summarizes the steps and processes that were completed to establish a specialized in-house DRC within an academic (non-medical based) setting. We begin with a review of the expertise needed, licensure and safety requirements, equipment, space and staffing needs, as well as legal considerations. Then, data on the educational impact of the program on students are presented. Our aim is to provide guidance for other graduate programs that are interested and invested in establishing a similar initiative.
Student Preparation for Dysphagia Practice: Universities and Practicum Sites Supporting a Common Outcome
Authors: Chase Wendy , Gonzales Lucinda Soares
Published: August 2016

This article will describe the approach to dysphagia education in a classroom setting at the University of Connecticut (UCONN), explore the disparity between student performance in schools vs. health care settings that was discovered at UCONN, and offer suggestions for practicum supervisors in medical settings to enhance student acquisition of competence.
Virtual Patient Simulation Training in Graduate Dysphagia Management Education—A Research-Led Enhancement Targeting Development of Clinical Interviewing and Clinical Reasoning Skills
Authors: Sia Isaac , Halan Shivashankar , Lok Benjamin , Crary Michael A.
Published: August 2016

Access to patients for clinical education is a challenge for educators and students across all health care professions. Led by colleagues in medical and nursing education, health care educators have increasingly embraced new teaching technologies such as virtual patient (VP) simulation training to support certain aspects of clinical education. This paper presents an account of the systematic, multi-year, research-led incorporation of computer generated virtual humans (i.e., embodied conversational agents) in a dysphagia management course targeting development of clinical interviewing and clinical reasoning skills in graduate speech-language pathology students.
Need for Culturally Responsive Literacy Instruction in Native American Communities
Authors: Gillispie Matthew
Published: August 2016

Since the time of the European colonialism and Manifest Destiny, all Native American (NA) communities have experienced intergenerational historical trauma stemming from past and current events. The resulting effects of historical trauma on individuals, families, and communities pass from generation to generation, and are hypothesized to be the cause of contemporary social, health, and educational disparities in NA communities. The author first provides an overview of historical trauma and persistent social, health, and educational disparities in NA communities today. This is followed with an introduction to culturally responsive instruction and services, and how this should be applied to NA children and communities. To conclude the article, readers are provided a description and key components of a university personnel preparation project, designed to recruit, educate, and empower future NA and non-NA speech-language pathologists (SLPs) with coursework and experiences related to culturally responsive early literacy instruction and services, as well as resources and examples for current educators and professionals.
Sensorless control for switched reluctance motor based on gradient of phase inductance
Authors: Shao Jie , Deng Zhiquan , Gu Yu
Published: August 2016

A novel sensorless control for switched reluctance motor based on gradient of phase inductance is presented. In this method, current chopped control is adopted during the un‐energised period. For chopping at currents near zero, continuous monitoring of phase inductance is possible. This proposed method uses the change of the gradient of the phase inductance to detect the un‐aligned position. Experimental results demonstrate the validity of the proposed method.
Mid‐term vulnerability analysis of power systems under intentional attacks
Authors: Sayyadipour Saeed , Yousefi Gholam Reza , Latify Mohammad Amin
Published: August 2016

This study addresses the vulnerability analysis of power systems over a time horizon. The authors introduce a model which could be used by system operators to assess where and when, over a specific time horizon, their power systems are most vulnerable to intentional attacks. This new time‐phased vulnerability analysis is modelled as a bilevel programming problem in which in the upper level, an attacker determines the best attack plan, including the best locations and the best times over the time horizon, for launching attacks. In the lower level, the system operator minimises the system operation and load shedding costs. Using duality theory, the bilevel optimisation problem is converted into a mathematical programming with equilibrium constraints which is subsequently converted to a single‐level mixed integer linear programming problem by means of linearisation techniques. This model is tested on modified Garver 6‐bus test system, modified IEEE 24‐bus reliability test system, and IEEE 300‐bus test system. The results appreciate the capability of the proposed model and show that it is indispensable to consider the time in analysing the vulnerability of power systems.
Feasibility study to use the current transformers as inductive partial discharge sensors
Authors: Haghjoo Farhad , Savaei Ali
Published: August 2016

Partial discharge (PD) is the most important factor in gradual insulation deterioration of high‐voltage (HV) power equipment, and then PD trend monitoring is a great issue for their condition assessment. Impulsive high‐frequency PD current/voltage signals can be detected by using electrical sensors, e.g. inductive/capacitive sensors. A comprehensive feasibility study is carried out to use the power frequency current transformers (CTs) that are already installed in medium voltage and HV electrical power systems instead of high‐frequency CTs. To achieve this aim, frequency response of a sample protection CT is extracted experimentally and it is fitted to appropriate transfer functions to access the related frequency characteristics. Regarding improper CT frequency response and its extreme variations in different frequencies, reversed transfer function is obtained to apply to CT secondary signals for reconstructing CT input PD pulses. Two types of artificial PD pulses are examined to validate the proposed method and the experimental results show that power frequency CTs can be used for PD detection and measurement in some frequency bands.
Forecasting the load of electrical power systems in mid‐ and long‐term horizons: a review
Authors: Khuntia Swasti R. , Rueda José L. , van der Meijden Mart A.M.M.
Published: August 2016

Load forecasting has always been an important part in the planning and operation of electric utilities, i.e. both transmission and distribution companies. With technological advancement, change in economic condition and many other factors (to be discussed in this work), load forecasting is becoming more important. The forecast affects as well as gets affected because of the load impacting factors and actions taken in different time horizons. However, due to its stochastic and uncertainty characteristics, it has been one challenging problem for electrical utilities to accurately forecast future load demand. This study aims at reviewing the different load forecasting techniques developed for the mid‐ and long‐term horizons of electrical power systems. Since there has never been an explicit literature study of the various forecasting techniques for mid‐ and long‐term horizons, this study reviews techniques for each of the forecasting horizons, citing various methodologies developed so far supported by published literature. This study is concluded with discussion on future research directions.
Experimental testing and model validation of a decoupled‐phase on‐load tap‐changer transformer in an active network
Authors: Zecchino Antonio , Hu Junjie , Coppo Massimiliano , Marinelli Mattia
Published: August 2016

Owing to the increasing penetration of single‐phase small generation units and electric vehicles connected to distribution grids, system operators are facing challenges related to local unbalanced voltage rise or drop issues, which may lead to a violation of the allowed voltage band. To address this problem, distribution transformers with on‐load tapping capability are under development. This study presents model and experimental validation of a 35 kVA three‐phase power distribution transformer with independent on‐load tap‐changer control capability on each phase. With the purpose of investigating and evaluating its effectiveness under different operative conditions, appropriate scenarios are defined and tested considering both balanced and unbalanced situations, also in case of reverse power flow. The experimental setup is built starting from an analysis of a Danish distribution network, in order to reproduce the main feature of an unbalanced grid. The experimental activities are recreated in by carrying out dynamics simulation studies, aiming at validating the implemented models of both the transformer as well as the other grid components. Phase–neutral voltages’ deviations are limited, proving the effectiveness of the phase‐independent tap operations. Furthermore, minor deviations of the results from simulations and experiments confirm that all the system components have been properly modelled.
Quantification of variability of valid travel times with FMMs for buses, passenger cars, and taxis
Authors: Yuan Shaoxin , Wright Benjamin , Zou Yajie , Wang Yinhai
Published: August 2016

Quantifying travel time variability (TTV) of buses, passenger cars, and taxis helps individuals understand the reliability of their trips. However, invalid travel time data compromises the accuracy of quantifying the variability of valid travel times. In this study, a clustering methodology, the K− 2 finite mixture model (K− 2FMM) based on a log‐normal distribution, is presented to address the problems of identifying invalid travel times and quantifying the variability of valid travel times in the distribution. The K− 2FMM approach can dynamically find an exact K value to cluster travel time data into K log‐normal components to best classify the invalid and valid travel times. As a result, invalid travel times represented by component K are filtered out. Other K− 1 components are used to measure the degree of variability of valid travel times and to determine some TTV indices such as mean, variance, and 90th percentile travel time. Two real cases illustrate the characteristics of period‐to‐period TTV for three travel modes. TTV of three travel modes are analysed and distinct taxi TTV is revealed by means of optimal K− 1 components. Hence, the proposed K− 2FMM approach is appropriate for researchers to more accurately quantify the variability of valid travel times.
On the description of Brownian particles in confinement on a non-Cartesian coordinates basis
Authors: Dagdug Leonardo , García-Chung Angel A. , Chacón-Acosta Guillermo
Published: August 2016

We developed a theoretical framework to study the diffusion of Brownian point-like particles in bounded geometries in two and three dimensions. We use the Frenet-Serret moving frame as the coordinate system. For narrow tubes and channels, we use an effective one-dimensional description reducing the diffusion equation to a Fick-Jacobs-like equation. From this last equation, we can calculate the effective diffusion coefficient applying Neumann boundary conditions. On one hand, for channels with a straight axis our theoretical approximation for the effective coefficient does coincide with the reported in the literature [D. Reguera and J. M. Rubí, Phys. Rev. E 64, 061106 (2001) and P. Kalinay and J. K. Percus, ibid. 74, 041203 (2006)]. On the other hand, for tubes with a straight axis and circular cross-section our analytical expression does not coincide with the reported by Rubí and Reguera and by Kalinay and Percus, although it is practically identical.
Acceleration of saddle-point searches with machine learning
Authors: Peterson Andrew A.
Published: August 2016

In atomistic simulations, the location of the saddle point on the potential-energy surface (PES) gives important information on transitions between local minima, for example, via transition-state theory. However, the search for saddle points often involves hundreds or thousands of ab initio force calls, which are typically all done at full accuracy. This results in the vast majority of the computational effort being spent calculating the electronic structure of states not important to the researcher, and very little time performing the calculation of the saddle point state itself. In this work, we describe how machine learning (ML) can reduce the number of intermediate ab initio calculations needed to locate saddle points. Since machine-learning models can learn from, and thus mimic, atomistic simulations, the saddle-point search can be conducted rapidly in the machine-learning representation. The saddle-point prediction can then be verified by an ab initio calculation; if it is incorrect, this strategically has identified regions of the PES where the machine-learning representation has insufficient training data. When these training data are used to improve the machine-learning model, the estimates greatly improve. This approach can be systematized, and in two simple example problems we demonstrate a dramatic reduction in the number of ab initio force calls. We expect that this approach and future refinements will greatly accelerate searches for saddle points, as well as other searches on the potential energy surface, as machine-learning methods see greater adoption by the atomistics community.
Cauchy problem for the ellipsoidal-BGK model of the Boltzmann equation
Authors: Park Sa Jun , Yun Seok-Bae
Published: August 2016

Ellipsoidal BGK model (ES-BGK) is a generalized version of the original BGK model designed to reproduce the physically correct Prandtl number in the Navier-Stokes limit. In this paper, we study the Cauchy problem for the ES-BGK model under the condition of finite initial mass, energy, and entropy. Equivalence type estimates for the temperature tensor are crucially used.
A generalized Hirota-Satsuma coupled KdV system: Darboux transformations and reductions
Authors: Xue Lingling , Liu Q. P. , Wang Dengshan
Published: August 2016

A Darboux transformation is constructed for the generalized Hirota-Satsuma coupled KdV system and the result is compared with the recent work of Geng and his collaborators [X. G. Geng et al., Phys. Rev. E 79, 056602 (2009) and X. G. Geng and G. L. He, J. Math. Phys. 51, 033514 (2010)]. It is shown that our Darboux transformation may be applied to three interesting reductions of the general system. In addition, the iteration of this Darboux transformation is worked out, and some solutions to the associated systems are obtained.
Coherent states, quantum gravity, and the Born-Oppenheimer approximation. III.: Applications to loop quantum gravity
Authors: Stottmeister Alexander , Thiemann Thomas
Published: August 2016

In this article, the third of three, we analyse how the Weyl quantisation for compact Lie groups presented in the second article of this series fits with the projective-phase space structure of loop quantum gravity-type models. Thus, the proposed Weyl quantisation may serve as the main mathematical tool to implement the program of space adiabatic perturbation theory in such models. As we already argued in our first article, space adiabatic perturbation theory offers an ideal framework to overcome the obstacles that hinder the direct implementation of the conventional Born-Oppenheimer approach in the canonical formulation of loop quantum gravity.
Development of a novel miniature detonation-driven shock tube assembly that uses in situ generated oxyhydrogen mixture
Authors: Janardhanraj S. , Jagadeesh G.
Published: August 2016

A novel concept to generate miniature shockwaves in a safe, repeatable, and controllable manner in laboratory confinements using an in situ oxyhydrogen generator has been proposed and demonstrated. This method proves to be more advantageous than existing methods because there is flexibility to vary strength of the shockwave, there is no need for storage of high pressure gases, and there is minimal waste disposal. The required amount of oxyhydrogen mixture is generated using alkaline electrolysis that produces hydrogen and oxygen gases in stoichiometric quantity. The rate of oxyhydrogen mixture production for the newly designed oxyhydrogen generator is found to be around 8 ml/s experimentally. The oxyhydrogen generator is connected to the driver section of a specially designed 10 mm square miniature shock tube assembly. A numerical code that uses CANTERA software package is used to predict the properties of the driver gas in the miniature shock tube. This prediction along with the 1-D shock tube theory is used to calculate the properties of the generated shockwave and matches reasonably well with the experimentally obtained values for oxyhydrogen mixture fill pressures less than 2.5 bars. The miniature shock tube employs a modified tri-clover clamp assembly to facilitate quick changing of diaphragm and replaces the more cumbersome nut and bolt system of fastening components. The versatile nature of oxyhydrogen detonation-driven miniature shock tube opens up new horizons for shockwave-assisted interdisciplinary applications.
A CMOS millimeter-wave transceiver embedded in a semi-confocal Fabry-Perot cavity for molecular spectroscopy
Authors: Drouin Brian J. , Tang Adrian , Schlecht Erich , Brageot Emily , Gu Q. Jane , Ye Y. , Shu R. , Frank Chang Mau-chung , Kim Y.
Published: August 2016

The extension of radio frequency complementary metal oxide semiconductor (CMOS) circuitry into millimeter wavelengths promises the extension of spectroscopic techniques in compact, power efficient systems. We are now beginning to use CMOS millimeter devices for low-mass, low-power instrumentation capable of remote or in situ detection of gas composition during space missions. We have chosen to develop a Flygare-Balle type spectrometer, with a semi-confocal Fabry-Perot cavity to amplify the pump power of a mm-wavelength CMOS transmitter that is directly coupled to the planar mirror of the cavity. We have built a pulsed transceiver system at 92-105 GHz inside a 3 cm base length cavity and demonstrated quality factor up to 4680, allowing for modes with 20 MHz bandwidth, with a sufficient cavity amplification factor for mW class transmitters. This work describes the initial gas measurements and outlines the challenges and next steps.
Field induced changes in the ring/chain equilibrium of hydrogen bonded structures: 5-methyl-3-heptanol
Authors: Young-Gonzales Amanda R. , Richert Ranko
Published: August 2016

Using non-linear dielectric techniques, we have measured the dynamics of 5-methyl-3-heptanol at a temperature at which the Kirkwood correlation factor gK indicates the coexistence of ring- and chain-like hydrogen-bonded structures. Steady state permittivity spectra recorded in the presence of a high dc bias electric field (17 MV/m) reveal that both the amplitude and the time constant are increased by about 10% relative to the low field limit. This change is attributed to the field driven conversion from ring-like to the more polar chain-like structures, and a direct observation of its time dependence shows that the ring/chain structural transition occurs on a time scale that closely matches that of the dielectric Debye peak. This lends strong support to the picture that places fluctuations of the end-to-end vector of hydrogen bonded structures at the origin of the Debye process, equivalent to fluctuations of the net dipole moment or gK. Recognizing that changes in the ring/chain equilibrium constant also impact the spectral separation between Debye and α-process may explain the difference in their temperature dependence whenever gK is sensitive to temperature, i.e., when the structural motifs of hydrogen bonding change considerably.
Microscopic origin of self-similarity in granular blast waves
Authors: Barbier M. , Villamaina D. , Trizac E.
Published: August 2016

The self-similar expansion of a blast wave, well-studied in air, has peculiar counterparts in dense and dissipative media such as granular gases. Recent results have shown that, while the traditional Taylor-von Neumann-Sedov (TvNS) derivation is not applicable to such granular blasts, they can nevertheless be well understood via a combination of microscopic and hydrodynamic insights. In this article, we provide a detailed analysis of these methods associating molecular dynamics simulations and continuum equations, which successfully predict hydrodynamic profiles, scaling properties, and the instability of the self-similar solution. We also present new results for the energy conserving case, including the particle-level analysis of the classic TvNS solution and its breakdown at higher densities.
Combined Brillouin light scattering and microwave absorption study of magnon-photon coupling in a split-ring resonator/YIG film system
Authors: Klingler S. , Maier-Flaig H. , Gross R. , Hu C.-M. , Huebl H. , Goennenwein S. T. B. , Weiler M.
Published: August 2016

Microfocused Brillouin light scattering (BLS) and microwave absorption (MA) are used to study magnon-photon coupling in a system consisting of a split-ring microwave resonator and an yttrium iron garnet (YIG) film. The split-ring resonator is defined by optical lithography and loaded with a 1 μm-thick YIG film grown by liquid phase epitaxy. BLS and MA spectra of the hybrid system are simultaneously recorded as a function of the applied magnetic field magnitude and microwave excitation frequency. Strong coupling of the magnon and microwave resonator modes is found with a coupling strength of geff /2π = 63 MHz. The combined BLS and MA data allow us to study the continuous transition of the hybridized modes from a purely magnonic to a purely photonic mode by varying the applied magnetic field and microwave frequency. Furthermore, the BLS data represent an up-conversion of the microwave frequency coupling to optical frequencies.
Contribution of velocity-vorticity correlations to the frictional drag in wall-bounded turbulent flows
Authors: Yoon Min , Ahn Junsun , Hwang Jinyul , Sung Hyung Jin
Published: August 2016

The relationship between the frictional drag and the velocity-vorticity correlations in wall-bounded turbulent flows is derived from the mean vorticity equation. A formula for the skin friction coefficient is proposed and evaluated with regards to three canonical wall-bounded flows: turbulent boundary layer, turbulent channel flow, and turbulent pipe flow. The frictional drag encompasses four terms: advective vorticity transport, vortex stretching, viscous, and inhomogeneous terms. Drag-reduced channel flow with the slip condition is used to test the reliability of the formula. The advective vorticity transport and vortex stretching terms are found to dominate the contributions to the frictional drag.
High temperature reactive ion etching of iridium thin films with aluminum mask in CF4/O2/Ar plasma
Authors: Yeh Chia-Pin , Lisker Marco , Kalkofen Bodo , Burte Edmund P.
Published: August 2016

Reactive ion etching (RIE) technology for iridium with CF4/O2/Ar gas mixtures and aluminum mask at high temperatures up to 350 °C was developed. The influence of various process parameters such as gas mixing ratio and substrate temperature on the etch rate was studied in order to find optimal process conditions. The surface of the samples after etching was found to be clean under SEM inspection. It was also shown that the etch rate of iridium could be enhanced at higher process temperature and, at the same time, very high etching selectivity between aluminum etching mask and iridium could be achieved.
Hybrid rib-slot-rib plasmonic waveguide with deep-subwavelength mode confinement and long propagation length
Authors: Zheng Kai , Zheng Xin , Dai Qi , Song Zuxun
Published: August 2016

We propose a hybrid plasmonic waveguide where a combined rib-slot-rib structure is added on the metal substrate within a low-index gap region. The optical properties of the quasi-TM fundamental mode are numerically calculated using the finite element method. Compared to the traditional hybrid plasmonic waveguide, our designed waveguiding structure can support modes with tighter confinement and longer propagation length, by properly adjusting the geometry of the rib-slot-rib structure and the gap height. In details, it can provide the hybrid mode with mode area λ2/12000 and reasonable propagation distance 23.78 μm, simultaneously. Its excellent optical performance can facilitate potential applications in ultra-compact nanophotonic devices and circuits.
Rice-cold tolerance across reproductive stages
Authors: Mitchell J. H. , Zulkafli S. L. , Bosse J. , Campbell B. , Snell P. , Mace E. S. , Godwin I. D. , Fukai S.
Published: August 2016

Cold temperature stress at the reproductive stage, particularly at booting and flowering stages can cause significant reductions in rice (Oryza sativa L.) yield particularly at high latitudes and elevation. Although genotypic variation for cold tolerance is known to exist, the tolerance mechanisms and genotypic consistency across the stages are yet to be understood for segregating populations. Three experiments were conducted under controlled temperature glasshouse conditions to determine floral characteristics that were associated with cold tolerance at the flowering stage and to determine genotypic consistency at the booting and flowering stages. Twenty F5 Reiziq × Lijiangheigu lines from two extreme phenotypic bulks selected for cold tolerance at booting stage in the F2 generation were utilised.
Spikelet sterility under cold stress at booting was significantly correlated with spikelet sterility under cold stress at flowering (r = 0.62**) with five lines identified as cold tolerant across reproductive stages. There was also a positive correlation (r = 0.47*) between spikelet sterility under cold stress at booting at the F5 and at the F2 generation. The quantitative trait loci (QTL; qLTSPKST10.1) previously identified on chromosome 10 contributing to spikelet sterility within the F2 generation, was also identified in the F5 generation. Additionally, genomic regions displaying significant segregation between the progenies contrasting for their cold tolerance response phenotype were identified on chromosomes 5 and 7 with Lijiangheigu as allelic donor and an estimated reduction in spikelet sterility of 25% and 27%, respectively. Although genotypic variation in spikelet sterility at the booting stage was not related to the development rate for heading or flowering, those cold-tolerant genotypes at the flowering stage were the quickest to complete flowering. Cold-tolerant genotypes at the flowering stage had larger numbers of dehisced anthers and subsequently pollen number on stigma, which contributed to reduced spikelet sterility. It is concluded that enhanced anther dehiscence plays a significant role in improved cold tolerance at the flowering stage.
Marine invasive species: establishing pathways, their presence and potential threats in the Galapagos Marine Reserve
Authors: Keith Inti , Dawson Terence P. , Collins Ken J. , Campbell Marnie L.
Published: August 2016

Worldwide, marine biological invasions of non-native species have increased significantly in recent years due to a rapid rise in global trade, transport and tourism. Invasions occur when non-native species are transported from one region to another and establish, often resulting in competition displacing native species and changing ecosystems. Historic literature searches were conducted along with dive surveys of the main ports and in sites around the archipelago in order to produce a baseline of which non-native species are present in the Galapagos Marine Reserve at this time. Confounding processes of anthropogenic and natural activities are increasing the potential spread of marine invasive species in the Eastern Tropical Pacific and the Galapagos Marine Reserve. We discuss the potential vectors facilitating marine invasions with the suggestion that marine traffic could be the most influential vector in the transport of marine non-natives to the Galapagos Marine Reserve. The challenge for marine park authorities is to identify those species that are likely to cause negative impacts on native biodiversity and ecosystems before they establish in the Galapagos, and to develop pre-emptive strategies that would likely include prevention as well as risk-based management strategies to remove them or to mitigate their harmful effects.