bluuebunny/crossref_metadata_2025 huggingface dataset:
Adapted Taekwondo Training for Prepubertal Children with Developmental Coordination Disorder: A Randomized, Controlled Trial
Authors: Ma Ada W. W. , Fong Shirley S. M. , Guo X. , Liu Karen P. Y. , Fong Daniel Y. T. , Bae Young-Hyeon , Yuen Lily , Cheng Yoyo T. Y. , Tsang William W. N.
Published: July 2018

This study evaluated the effectiveness of adapted Taekwondo (TKD) training on skeletal development and motor performance in children with developmental coordination disorder (DCD). One hundred forty-five prepubertal children with DCD were allocated to either the TKD or control groups. Children in the TKD group participated in a weekly 1-hour adapted TKD intervention and daily TKD home exercises for 12 weeks. The primary outcome (delay in skeletal development) and secondary outcomes (Movement Assessment Battery for Children (MABC) total impairment score, eye–hand coordination (EHC) scores, and a standing balance score) were measured at baseline, after the intervention and 3 months after the intervention. Skeletal development improved in both groups over time (p < 0.017). The TKD group had a significant delay in skeletal development at baseline compared to the control group (p = 0.003) but caught up with the controls at 3 months (p = 0.041). Improvements in the MABC scores were also seen in both groups across time (p < 0.017). Only the TKD group had a significant improvement in the EHC movement time at 3 (p = 0.009) and 6 months (p = 0.016). The adapted TKD intervention may be effective in improving the skeletal development and EHC movement time of children with DCD. For motor performance, the effect of maturation might be more profound.
Helix α-3 inter-molecular salt bridges and conformational changes are essential for toxicity of Bacillus thuringiensis 3D-Cry toxin family
Authors: Pacheco Sabino , Gómez Isabel , Sánchez Jorge , García-Gómez Blanca-Ines , Czajkowsky Daniel M. , Zhang Jie , Soberón Mario , Bravo Alejandra
Published: July 2018

Bacillus thuringiensis insecticidal Cry toxins break down larval midgut-cells after forming pores. The 3D-structures of Cry4Ba and Cry5Ba revealed a trimeric-oligomer after cleavage of helices α-1 and α-2a, where helix α-3 is extended and made contacts with adjacent monomers. Molecular dynamic simulations of Cry1Ab-oligomer model based on Cry4Ba-coordinates showed that E101 forms a salt-bridge with R99 from neighbor monomer. An additional salt bridge was identified in the trimeric-Cry5Ba, located at the extended helix α-3 in the region corresponding to the α-2b and α-3 loop. Both salt-bridges were analyzed by site directed mutagenesis. Single-point mutations in the Lepidoptera-specific Cry1Ab and Cry1Fa toxins were affected in toxicity, while reversed double-point mutant partially recovered the phenotype, consistent with a critical role of these salt-bridges. The single-point mutations in the salt-bridge at the extended helix α-3 of the nematicidal Cry5Ba were also non-toxic. The incorporation of this additional salt bridge into the nontoxic Cry1Ab-R99E mutant partially restored oligomerization and toxicity, supporting that the loop between α-2b and α-3 forms part of an extended helix α-3 upon oligomerization of Cry1 toxins. Overall, these results highlight the role in toxicity of salt-bridge formation between helices α-3 of adjacent monomers supporting a conformational change in helix α-3.
Enhanced GABAergic actions resulting from the coapplication of the steroid 3α-hydroxy-5α-pregnane-11,20-dione (alfaxalone) with propofol or diazepam
Authors: Cao Lily Q. , Montana Michael C. , Germann Allison L. , Shin Daniel J. , Chakrabarti Sampurna , Mennerick Steven , Yuede Carla M. , Wozniak David F. , Evers Alex S. , Akk Gustav
Published: July 2018

Many GABAergic drugs are in clinical use as anesthetics, sedatives, or anxiolytics. We have investigated the actions of the combinations of the neuroactive steroid 3α-hydroxy-5α-pregnane-11,20-dione (alfaxalone) with the intravenous anesthetic propofol or the benzodiazepine diazepam. The goal of the study was to determine whether coapplication of alfaxalone reduces the effective doses and concentrations of propofol and diazepam. Behavioral effects of alfaxalone, propofol, diazepam, and the combinations of the drugs were evaluated during a 30-min activity test in mice. Functional effects of the individual drugs and drug combinations were tested by measuring the decay times of spontaneous inhibitory postsynaptic currents in rat hippocampal neurons, and peak current responses from heterologously expressed concatemeric α1β2γ2L GABAA receptors. Co-administration of alfaxalone increased the sedative actions of propofol and diazepam in mice. The combination of alfaxalone with propofol or diazepam increased the decay times of sIPSCs and shifted the concentration-response relationships for GABA-activated receptors to lower transmitter concentrations. We infer that alfaxalone acts as a co-agonist to enhance the GABAergic effects of propofol and diazepam. We propose that co-administration of alfaxalone, and possibly other neuroactive steroids, can be employed to reduce dosage requirements for propofol and diazepam.
Immunity and the coral crisis
Authors: Palmer Caroline V.
Published: July 2018

Climate change is killing coral at an unprecedented rate. As immune systems promote homeostasis and survival of adverse conditions I propose we explore coral health in the context of holobiont immunity.
Multi-frequency electrical impedance tomography and neuroimaging data in stroke patients
Authors: Goren Nir , Avery James , Dowrick Thomas , Mackle Eleanor , Witkowska-Wrobel Anna , Werring David , Holder David
Published: July 2018

Electrical Impedance Tomography (EIT) is a non-invasive imaging technique, which has the potential to expedite the differentiation of ischaemic or haemorrhagic stroke, decreasing the time to treatment. Whilst demonstrated in simulation, there are currently no suitable imaging or classification methods which can be successfully applied to human stroke data. Development of these complex methods is hindered by a lack of quality Multi-Frequency EIT (MFEIT) data. To address this, MFEIT data were collected from 23 stroke patients, and 10 healthy volunteers, as part of a clinical trial in collaboration with the Hyper Acute Stroke Unit (HASU) at University College London Hospital (UCLH). Data were collected at 17 frequencies between 5 Hz and 2 kHz, with 31 current injections, yielding 930 measurements at each frequency. This dataset is the most comprehensive of its kind and enables combined analysis of MFEIT, Electroencephalography (EEG) and Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) data in stroke patients, which can form the basis of future research into stroke classification.
High concentration aqueous magnetic fluids: structure, colloidal stability, magnetic and flow properties
Authors: Vasilescu Corina , Latikka M. , Knudsen K. D. , Garamus V. M. , Socoliuc V. , Turcu Rodica , Tombácz Etelka , Susan-Resiga Daniela , Ras R. H. A. , Vékás L.
Published: July 2018

This paper is an in-depth analysis devoted to two basic types of water-based magnetic fluids (MFs), containing magnetite nanoparticles with electrostatic (a) and with electro-steric (b) stabilization, both obtained by chemical coprecipitation synthesis under atmospheric conditions.
Breast cancer subtype specific biochemical responses to radiation
Authors: Meksiarun Phiranuphon , Aoki Pedro H. B. , Van Nest Samantha J. , Sobral-Filho Regivaldo Gomes , Lum Julian J. , Brolo Alexandre G. , Jirasek Andrew
Published: July 2018

External beam radiotherapy is a common form of treatment for breast cancer.
In celebration of the 60th birthday of 2 microfluidics pioneers: Professor Susan Lunte and Professor James Landers
Authors: Easley Christopher J. , Regan Fiona , Roper Michael G. , Martin R. Scott
Published: July 2018

Christopher Easley, Fiona Regan, Michael Roper and R. Scott Martin look at the achievements of Susan Lunte and James Landers.
Redox-responsive cisplatin nanogels for anticancer drug delivery
Authors: Zhang Weiqi , Tung Ching-Hsuan
Published: July 2018

Inspired by cisplatin's deactivation by glutathione (GSH) in cancer, a GSH responsive nanogel loaded with doxorubicin (Dox) was prepared using hyaluronan as a matrix and cisplatin as a crosslinker.
Photocatalytic production of hydrogen peroxide through selective two-electron reduction of dioxygen utilizing amine-functionalized MIL-125 deposited with nickel oxide nanoparticles
Authors: Isaka Yusuke , Kondo Yoshifumi , Kawase Yudai , Kuwahara Yasutaka , Mori Kohsuke , Yamashita Hiromi
Published: July 2018

Photocatalytic H2O2 production via two-electron reduction of O2 is realized by visible-light irradiation of a Ti-based metal–organic framework, MIL-125-NH2.
Transforming benzylideneamine N,C-chelate boron compounds to BN-cycloocta-/cyclohepta-trienes bearing a tetrasubstituted BN unit via photoisomerization
Authors: Li Hai-Jun , Mellerup Soren K. , Wang Xiang , Wang Suning
Published: July 2018

Simple benzylideneamine N,C-chelate boron compounds have been found to undergo clean photoisomerization forming rare 7- and 8-membered heterocycles that contain a tetrasubstituted BN unit.
Transformation of single MOF nanocrystals into single nanostructured catalysts within mesoporous supports: a platform for pioneer fluidized-nanoreactor hydrogen carriers
Authors: Luz Ignacio , Soukri Mustapha , Lail Marty
Published: July 2018

Well-dispersed nanostructured catalysts have been prepared via a novel multistep approach involving the transformation of MOF nanocrystals previously confined within the mesoporous materials via novel solid state synthesis.
Remarkable multimember-ring configurations in a new family of Na7MIISb5S12(MII= Zn, Cd, Hg) exhibiting various three-dimensional tunnel structures
Authors: Wu Kui , Zhang Bingbing , Yang Zhihua , Pan Shilie
Published: July 2018

A new series of thioantimonates featuring the newly discovered trimer (MII/Sb)3S9and 12 + 12-MR configurations are verified as potential IR birefringent materials.
N-Sulfonyl acetylketenimine as a highly reactive intermediate for the synthesis of N-sulfonyl amidines
Authors: Yang Weiguang , Huang Dayun , Zeng Xiaobao , Luo Dongping , Wang Xinyan , Hu Yuefei
Published: July 2018

A highly reactive intermediate N-sulfonyl acetylketenimine was generated from a 3-butyn-2-one participating CuAAC/ring-opening method.
Fluorinated cyclopropanes: synthesis and chemistry of the aryl α,β,β-trifluorocyclopropane motif
Authors: Thomson Connor J. , Zhang Qingzhi , Al-Maharik Nawaf , Bühl Michael , Cordes David B. , Slawin Alexandra M. Z. , O’Hagan David
Published: July 2018

A general route to aryl α,β,β-trifluorocyclopropanes is reported and aryl oxidation gave the corresponding α,β,β-trifluorocyclopropane carboxylic acid.
First complex oxide superconductor by atomic layer deposition
Authors: Sønsteby Henrik Hovde , Aarholt Thomas , Prytz Øystein , Fjellvåg Helmer , Nilsen Ola
Published: July 2018

The first reported complex oxide superconductor (La2−xSrxCuO4−y) by atomic layer deposition.
Reversible 1,1-hydroaluminations and C–H activation in reactions of a cyclic (alkyl)(amino) carbene with alane
Authors: Cao Levy L. , Stephan Douglas W.
Published: July 2018

Varying the reaction ratio of cyclic (alkyl)(amino) carbene (cAACEt) with AlH3·NEtMe2 leads to the isolation of (cAACEtH)AlH2·NEtMe21 and (cAACEtH)2Al(μ-H)2AlH2·NEtMe22 and the first example of a monomeric dialkyl-aluminum hydride (cAACEtH)2AlH 3.
Synthesis and properties of ZnO/TiO2/Sb2S3 core–shell nanowire heterostructures using the SILAR technique
Authors: Parize Romain , Cossuet Thomas , Appert Estelle , Chaix-Pluchery Odette , Roussel Hervé , Rapenne Laetitia , Consonni Vincent
Published: July 2018

The successive ionic layer adsorption and reaction (SILAR) technique is found to be of high potential for the formation of ZnO core–shell nanowire heterostructures with high uniformity at moderate temperature.
Fast growth of undoped and Sn- and Tb-doped ZnO nanowires by Joule heating of Zn
Authors: Urbieta Ana , Sánchez Víctor , Fernández Paloma , Piqueras Javier
Published: July 2018

Joule heating of Zn wires has been used to grow undoped and Sn- or Tb-doped ZnO nanowires in seconds.
Crystalline structure of an ammonia borane–polyethylene oxide cocrystal: a material investigated for its hydrogen storage potential
Authors: Ploszajski Anna R. , Billing Matthew , Cockcroft Jeremy K. , Skipper Neal T.
Published: July 2018

Rare polymer crystal structure formed by ammonia borane in polyethylene oxide exhibiting a snake-like chain through the crystal.
Photochemical upconversion is suppressed by high concentrations of molecular sensitizers
Authors: Gholizadeh Elham M. , Frazer Laszlo , MacQueen Rowan W. , Gallaher Joseph K. , Schmidt Timothy W.
Published: July 2018

High concentrations of molecular sensitizer shorten emitter triplet lifetimes and lead to lower upconversion efficiency.
Defects in orthorhombic LaMnO3 – ionic versus electronic compensation
Authors: Gavin Ailbhe L. , Watson Graeme W.
Published: July 2018

The findings of this work represent a comprehensive study of alkaline earth doping of bulk orthorhombic LaMnO3 to determine site selectivity and the charge compensation mechanism for the dopants.
Bridge-bonded methylthiolate on Au(111) observed with the scanning tunneling microscope
Authors: Holmes Scott , Gao Jianzhi , Tang Lin , Li Fangsen , Palmer Richard E. , Guo Quanmin
Published: July 2018

We report the discovery of bridge-bonded methylthiolate, SCH3, along the step edges of the Au(111) surface.
Merging the catechol–TiO2 complex photocatalyst with TEMPO for selective aerobic oxidation of amines into imines
Authors: Shi Ji-Long , Hao Huimin , Li Xia , Lang Xianjun
Published: July 2018

Merging of catechol–TiO2 complex photocatalysis with TEMPO catalysis can successfully facilitate the selective oxidation of amines into imines with air under blue LED irradiation.
Oxygenate formation over K/β-Mo2C catalysts in the Fischer–Tropsch synthesis
Authors: Marquart Wijnand , Morgan David J. , Hutchings Graham J. , Claeys Michael , Fischer Nico
Published: July 2018

Potassium promoted β-Mo2C catalysts were studied in the hydrogenation of CO to oxygenates. The effect of synthesis procedures, promotion levels and reaction conditions on catalyst activity and selectivity was investigated in detail.
Catalytic conversion of 5-hydroxymethylfurfural to some value-added derivatives
Authors: Kong Xiao , Zhu Yifeng , Fang Zhen , Kozinski Janusz A. , Butler Ian S. , Xu Lujiang , Song He , Wei Xiaojie
Published: July 2018

The catalytic mechanisms and catalyst design strategies for 5-hydroxymethylfural conversion are summarized.
Chaotic printing: using chaos to fabricate densely packed micro- and nanostructures at high resolution and speed
Authors: Trujillo-de Santiago Grissel , Alvarez Mario Moisés , Samandari Mohamadmahdi , Prakash Gyan , Chandrabhatla Gouri , Rellstab-Sánchez Pamela Inés , Byambaa Batzaya , Pour Shahid Saeed Abadi Parisa , Mandla Serena , Avery Reginald K. , Vallejo-Arroyo Alejandro , Nasajpour Amir , Annabi Nasim , Zhang Yu Shrike , Khademhosseini Ali
Published: July 2018

Chaotic flows are used to rapidly fabricate densely packed lamellar micro- and nanostructure that is then preserved by curing or photocrosslinking.
Single-crystalline integrated 4H-SiC nanochannel array electrode: toward high-performance capacitive energy storage for robust wide-temperature operation
Authors: Li Weijun , Liu Qiao , Chen Shanliang , Fang Zhi , Liang Xu , Wei Guodong , Wang Lin , Yang Weiyou , Ji Yuan , Mai Liqiang
Published: July 2018

The electrode nearly full-featured for robust wide-temperature operation based on single-crystalline integrated 4H-SiC nanochannel arrays was explored.
Well-dispersed ultrasmall VC nanoparticles embedded in N-doped carbon nanotubes as highly efficient electrocatalysts for hydrogen evolution reaction
Authors: Cao Liyun , Zhang Ning , Feng Liangliang , Huang Jianfeng , Feng Yongqiang , Li Wenbin , Yang Dan , Liu Qianqian
Published: July 2018

The rational design and synthesis of ultrasmall metal-based electrocatalysts using earth-abundant elements are considered as a promising route to improve catalytic properties.
Spontaneous directional transportations of water droplets on surfaces driven by gradient structures
Authors: Li Jian , Guo Zhiguang
Published: July 2018

Surfaces with gradient structures supply actuation for water droplets to attain spontaneous directional transportation. In this review, three typical gradient structures (wedge corners with an opening angle gradient, wedge-shaped surfaces, conical substrates) have been summarized based on recent studies. The detailed process of this spontaneous directional transportation and its influence factors and applications are also discussed in the following sections.
Pd-Catalyzed cascade cyclization of o-alkynylanilines via C–H/C–N bond cleavage leading to dibenzo[a,c]carbazoles
Authors: Zhang Sheng , Ma Hengmin , Ho Hon Eong , Yamamoto Yoshinori , Bao Ming , Jin Tienan
Published: July 2018

A new and efficient Pd-catalyzed cascade cyclization of biaryl-tethered o-alkynylanilines for the formation of dibenzo[a,c]carbazole derivatives has been reported.
Formamidinium-based planar heterojunction perovskite solar cells with alkali carbonate-doped zinc oxide layer
Authors: Jeong Jaeki , Kim Haeyeon , Yoon Yung Jin , Walker Bright , Song Seyeong , Heo Jungwoo , Park Song Yi , Kim Jae Won , Kim Gi-Hwan , Kim Jin Young
Published: July 2018

Planar formamidinium perovskite solar cells have been fabricated with an alkali carbonate-doped zinc oxide layer.
Cu-MOF: an efficient heterogeneous catalyst for the synthesis of symmetric anhydrides via the C–H bond activation of aldehydes
Authors: Ahmadzadeh Zahra , Mokhtari Javad , Rouhani Morteza
Published: July 2018

In this paper, an efficient synthetic method for the preparation of symmetric carboxylic anhydrides was reported using Cu2(BDC)2(DABCO) as an efficient heterogeneous catalyst via the C–H bond activation of aldehydes with good yields and simple work up.
Identifying site-dependent reactivity in oxidation reactions on single Pt particles
Authors: Dery Shahar , Kim Suhong , Haddad David , Cossaro Albano , Verdini Alberto , Floreano Luca , Toste F. Dean , Gross Elad
Published: July 2018

IR nanospectroscopy measurements revealed the influence of oxidizing reaction conditions on the reactivity of different surface sites on Pt particles.
Influence of doped charge transport layers on efficient perovskite solar cells
Authors: Avila Jorge , Gil-Escrig Lidon , Boix Pablo P. , Sessolo Michele , Albrecht Steve , Bolink Henk J.
Published: July 2018

A generic solar cell structure using undoped charge extraction layer is presented, that lead to efficient and rather stable solar cells.
Force-induced structural changes in non-sulfated carrageenan based oligosaccharides – a theoretical study
Authors: Brzyska A. , Płaziński W. , Woliński K.
Published: July 2018

In this work we use the Enforced Geometry Optimization (EGO) approach to simulate force-induced structural changes in the monomer, and di- up to pentameric oligomers of neutral and non-sulfated carrageenan based oligosaccharides.
Shear-induced parallel and transverse alignments of cylinders in thin films of diblock copolymers
Authors: Chen Yulong , Xu Qian , Jin Yangfu , Qian Xin , Ma Rui , Liu Jun , Yang Dexin
Published: July 2018

Shear-induced parallel and transverse alignments of cylinders in thin films of diblock copolymers and their underlying mechanisms were studied by simulations.
Layered graphene/mesoporous carbon heterostructures with improved mesopore accessibility for high performance capacitive deionization
Authors: Noonan Owen , Liu Yang , Huang Xiaodan , Yu Chengzhong
Published: July 2018

Layered graphene/mesoporous carbon heterostructures with controllable mesopore opening and pore length are synthesized, and demonstrate outstanding desalination performances.
Biomimetic material functionalized mixed matrix membranes for enhanced carbon dioxide capture
Authors: Zhang Yiming , Wang Huixian , Zhou Siyu , Wang Jing , He Xuezhong , Liu Jindun , Zhang Yatao
Published: July 2018

Different mixed matrix membranes (MMMs) with various CoBBP nanoparticle loadings were fabricated and tested. Compared to the pure Pebax membrane, the designed MMMs showed both high CO2permeability and high CO2/N2selectivity.
Spectroscopic insights leading to a better understanding of site-isolation in heterogeneous nanocatalysts
Authors: Manzoli Maela , Jouve Andrea , Gill Arran M. , Cravotto Giancarlo , Raja Robert
Published: July 2018

Pt nanoparticles (NPs) extruded from a copper chloropyrophosphate (CuClP) framework have been synthesized with different metal loadings and evaluated in the KA oil oxidation with molecular oxygen.
P vacancies-enriched 3D hierarchical reduced cobalt phosphide as a precursor template for defect engineering for efficient water oxidation
Authors: Zhou Xichen , Gao Hong , Wang Yifan , Liu Zhen , Lin Junqi , Ding Yong
Published: July 2018

By employing a facile reduction method towards cobalt phosphide, we synthesized a phosphorus defects-enriched reduced 3D porous cobalt phosphide nanoflower with in situ transformation for efficient water oxidation.
Reversible facile Rb+and K+ions de/insertion in a KTiOPO4-type RbVPO4F cathode material
Authors: Fedotov Stanislav S. , Samarin Aleksandr Sh. , Nikitina Victoria A. , Aksyonov Dmitry A. , Sokolov Sergey A. , Zhugayevych Andriy , Stevenson Keith J. , Khasanova Nellie R. , Abakumov Artem M. , Antipov Evgeny V.
Published: July 2018

In this paper, we report on a novel RbVPO4F fluoride phosphate, which adopts the KTiOPO4(KTP) type structure and complements the AVPO4F (A = alkali metal) family of positive electrode (cathode) materials for metal-ion batteries.
BCN nanosheets templated by g-C3N4 for high performance capacitive deionization
Authors: Wang Shiyong , Wang Gang , Wu Tingting , Zhang Yunqi , Zhan Fei , Wang Yuwei , Wang Jigang , Fu Yu , Qiu Jieshan
Published: July 2018

BCN nanosheets show a pore structure with a high specific surface area and are investigated as CDI electrode materials for the first time.
An overview of different strategies to introduce conductivity in metal–organic frameworks and miscellaneous applications thereof
Authors: Bhardwaj Sanjeev K. , Bhardwaj Neha , Kaur Rajnish , Mehta Jyotsana , Sharma Amit L. , Kim Ki-Hyun , Deep Akash
Published: July 2018

MOFs can attain conductivity efficiently through the incorporation of a variety of guest molecules due to their abundant pores and pendant groups.
Nonaqueous arylated quinone catholytes for lithium–organic flow batteries
Authors: Shin Dong-Seon , Park Minjoon , Ryu Jaechan , Hwang Inchan , Seo Jeong Kon , Seo Kwanyong , Cho Jaephil , Hong Sung You
Published: July 2018

Chemically tailored quinone catholytes have been utilized for tubular lithium–organic flow batteries in a continuous electrolyte flow mode.
Expression of concern: Preparation of face-centered-cubic indium nanocubes and their superior dehydrogenation activity towards aqueous hydrazine with the assistance of light
Authors: Neil Simon R. T.
Published: July 2018

Expression of concern for ‘Preparation of face-centered-cubic indium nanocubes and their superior dehydrogenation activity towards aqueous hydrazine with the assistance of light’ by Fang Luo et al., J. Mater. Chem. A, 2016, 4, 17665–17672.
Sustained antibacterial activity of berberine hydrochloride loaded supramolecular organoclay networks with hydrogen-bonding junctions
Authors: Wang Shiwei , Hou Yi , Zhang Shurong , Li Jing , Chen Qian , Yu Mingan , Li Wei
Published: July 2018

Berberine hydrochloride-loaded carboxymethyl β-cyclodextrin-functionalized montmorillonite nanosheet networks strongly suppressed the bacterial growth over three days.
Giant current amplification induced by ion migration in perovskite single crystal photodetectors
Authors: Wu Ting , Ahmadi Mahshid , Hu Bin
Published: July 2018

A giant current amplification was observed in the lateral organic–inorganic perovskite single crystal photodetectors. It was proposed that photoexcitation and electrical field induced migration and accumulation of ions at respective contacts. The interfacial charging due to ion accumulation offers an effective mechanism to trigger counter charge injection, consequently amplifying the total electrical current.
Expression of anti-Kasha's emission from amino benzothiadiazole and its utilization for fluorescent chemosensors and organic light emitting materials
Authors: Peng Zhixing , Wang Zaibin , Huang Zongwei , Liu Shaojie , Lu Ping , Wang Yanguang
Published: July 2018

Emission of amino benzothiadiazoles is controllable and might be used for white solution emission, fluorescent chemosensors, and emitting materials in OLEDs.
Phenylquinoline fused cyclic derivatives as electron acceptors of exciplex forming hosts for solution-processable red phosphorescent OLEDs
Authors: Zhang Yin , Liu Changmei , Hang Xiao-Chun , Xue Qin , Xie Guohua , Zhang Cong , Qin Tianshi , Sun Zhengyi , Chen Zhi-Kuan , Huang Wei
Published: July 2018

Skeletons of phenylquinoline fused cyclic derivatives for electron accepting materials are synthesized and their thermal, electrochemical, photophysical and device optoelectronic properties are fully characterized.
Vertically distributed VO2nanoplatelets on hollow spheres with enhanced thermochromic properties
Authors: Xu Huiyan , Dai Zhengfei , Wang Chen , Xu Kewei , Ma Fei , Chu Paul K.
Published: July 2018

Vanadium dioxide (VO2) is a phase-transition material exhibiting great potential in the field of smart windows for energy saving.
Information elasticity in radar systems
Authors: Narayanan R.M. , Liu A.Z. , Singerman P.G. , Rangaswamy M.
Published: July 2018

It is generally assumed that better and more effective decisions can be made in radar sensor processing if more ‘information’ is available. However, this is not always the case since more information may not necessarily translate to better sensor performance due to information overload. The concept of information elasticity is useful in determining the relationship and role of information, in both qualitative and quantitative terms, to its interactions with the surroundings. While Shannon's well‐known theory describes information in quantitative terms by assigning information value based on event probabilities, there are several instances where information obtained can only be described in fuzzy and qualitative terms. In this letter, the application of information elasticity to radar system performance is introduced.
NOMA‐based multiple‐antenna and multiple‐relay networks over Nakagami‐m fading channels with imperfect CSI and SIC error
Authors: Yan Xiaopeng , Ge Jianhua , Zhang Yangyang , Gou Lina
Published: July 2018

In this study, non‐orthogonal multiple access (NOMA)‐based multiple‐antenna and multiple‐relay networks over Nakagami‐m fading channels with imperfect channel state information (CSI) and successive interference cancellation (SIC) error are investigated. In order to measure the performance of the system, the exact outage probability and the ergodic sum rate of the system are explored. By analysing the impact of the partial relay selection scheme, it is shown that the performance gain can be achieved significantly by increasing the number of relays from one to two, but when the number of relays is equal to or greater than three, the increment of the performance gain becomes smaller and smaller, and finally saturated as the number of relays increases. Furthermore, due to the complexity of the derivation process for the ergodic sum rate, an upper bound of the ergodic sum rate is taken into account. Finally, by carrying out a series of experimental simulations, the authors prove the correctness of the theoretical derivations above, and from the comparison of NOMA and orthogonal multiple access (OMA), it is found that NOMA can provide better spectral efficiency and user fairness than OMA.
Resource planning and backhaul‐link optimisation for relay networks
Authors: Kim Taejoon , Yu Heejung
Published: July 2018

Relay stations (RSs), as key components of next‐generation heterogenous networks, can be readily deployed between base station (BS) and users to extend cell coverage and improve throughput. Since RSs are connected with a donor BS through wireless backhaul‐links, i.e. BS–RS links, additional radio resources should be allocated to these links. For in‐band relaying, access‐links and backhaul‐links should be jointly optimised, which make the resource allocation problem for a relay network more difficult and challenging. In this study, the authors develop an analytical framework for resource allocation in relay networks with a time‐division duplexing mode for access‐link and backhaul‐link transmissions. The solution of the proposed analytical framework maximises the total utility of the relay network, and interference coordination among the BS and RSs is also considered. The developed framework is thoroughly evaluated by comparison with exhaustive search methods in different case studies. The comparison results show that the proposed framework provides optimal solutions with low computational complexity.
BER performances of downlink and uplink NOMA in the presence of SIC errors over fading channels
Authors: Kara Ferdi , Kaya Hakan
Published: July 2018

Non‐orthogonal multiple access (NOMA) is a strong candidate for next generation radio access networks due to its ability of serving multiple users using the same time and frequency resources. Therefore, researchers in academia and industry have been recently investigating the error performances and capacity of NOMA schemes. The main drawback of NOMA techniques is the interference among users due to the its non‐orthogonal access nature, that is usually solved by interference cancellation techniques such as successive interference cancellation (SIC) at the receivers. On the other hand, the interference among users may not be completely eliminated in the SIC process due to the erroneous decisions in the receivers usually caused by channels. In this study, for the first time in the literature, the authors derive an exact closed‐form bit error rate (BER) expressions under SIC error for downlink NOMA over Rayleigh fading channels. Besides, they derive one‐degree integral form exact BER expressions and closed‐form approximate expressions for uplink NOMA. Then, the derived expressions are validated by simulations. The numerical results are depicted to reveal the effects of error during SIC process on the performance for various cases such as power allocation for downlink and channel quality difference for uplink.
Distributed voltage and frequency synchronisation control scheme for islanded inverter‐based microgrid
Authors: Shrivastava Sonam , Subudhi Bidyadhar , Das Susmita
Published: July 2018

This study presents a fully distributed control paradigm for secondary control of islanded AC microgrid (MG). The proposed method addresses both voltage and frequency restoration for inverter‐based distributed generators (DGs). The MG system has droop controlled DG units with predominantly inductive transmission lines and different communication topologies. The restoration scheme is fully distributed in nature, and the DGs need to communicate with their neighbours using a sparse communication network. The proposed control scheme is efficient to provide quick restoration of the voltage and frequency whilst accurate power‐sharing is achieved despite disturbances. Further, convergence and stability analysis of the proposed control scheme is presented. The proposed algorithm avoids the need for a central controller and complex communication structure thereby reducing the computational burden and the risk of single‐point‐failure. The performance of the proposed control scheme has been verified considering variations in load and communication topologies and link delay by pursuing an extensive simulation study in MATLAB/SimPowerSystem toolbox. The proposed control scheme supports plug‐and‐play demand and scalability of MG network. The proposed control scheme is also compared with the neighbourhood tracking error based distributed control scheme and observed that the former exhibit faster convergence and accurate performance despite disturbances in MG network.
The impact of bars and interactions on optically selected AGNs in spiral galaxies
Authors: Alonso Sol , Coldwell Georgina , Duplancic Fernanda , Mesa Valeria , Lambas Diego G.
Published: July 2018

Aims. With the aim of performing a suitable comparison of the internal process of galactic bars with respect to the external effect of interactions on driving gas toward the inner most region of the galaxies, we explored and compared the efficiency of both mechanisms on central nuclear activity in optically selected active galactic nuclei (AGNs) in spiral galaxies.

Methods. We selected homogeneous samples of barred AGNs and active objects residing in pair systems, derived from the Sloan Digital Sky Survey (SDSS). In order to carry out a reliable comparison of both samples (AGNs in barred hosts in isolation and in galaxy pairs), we selected spiral AGN galaxies with similar distributions of redshift, magnitude, stellar mass, color and stellar age population from both catalogs. With the goal of providing an appropriate quantification of the influence of strong bars and interactions on nuclear activity, we also constructed a suitable control sample of unbarred spiral AGNs without a companion and with similar host properties to the other two samples.

Results. We found that barred optically selected AGNs show an excess of nuclear activity (as derived from the Lum[OIII]) and accretion rate onto a central black hole (ℛ) with respect to AGNs in pairs. In addition, both samples show an excess of high values of Lum[OIII] and ℛ with respect to unbarred AGNs in the control sample. We also found that the fractions of AGNs with powerful nuclear activity and high accretion rates increase toward more massive hosts with bluer colors and younger stellar populations. Moreover, AGNs with bars exhibit a higher fraction of galaxies with powerful Lum[OIII] and efficient ℛ with respect to AGN galaxies inhabiting pair systems, in bins of different galaxy properties. Regarding AGNs belonging to pair systems, we found that the central nuclear activity is remarkably dependent on the galaxy pair companion features. The Lum[OIII] for AGNs in pairs is clearly enhanced when the galaxy companion exhibits a bright and more massive host with high metallicity, blue color, efficient star formation activity and young stellar population. The results of this work reveal an important capacity of both mechanisms, bars and interactions, to transport material towards the galaxy central regions. In this context, it should also be noted that the internal process of the bar is more efficient at improving the central nuclear activity in AGN objects than that corresponding to the external mechanism of the galaxy–galaxy interactions.
Specificity of energetic functioning of economic activity objects
Authors: Bednarek Karol , Bugala Artur , Typanska Dorota , Kasprzyk Leszek
Published: July 2018

Ecology is strongly related to the quality of energy management and to limiting the negative impact of the technosphere on the environment. This work refers to the analysis of energy quality and power balances in different, due to the specificity of functioning (used electrical equipment), business facilities. The research was carried out for supply networks: in the bank building, in the IT laboratory and in the office and warehouse facility. The measurements of currents, voltages, active, reactive and apparent power in individual phases of power supply system as well as distortions (higher harmonics) of currents and voltages were carried out. The research was carried out to identify irregularities in the networks and to indicate ways to limit the effects of electromagnetic disturbances (mainly higher harmonics) as well as achieve improvements in energy efficiency and ecology in the operation of these facilities.
Radiative cooling in polish climatic conditions
Authors: Cepiński Wojciech , Szmigiero Bartosz
Published: July 2018

Ecological, natural ways of obtaining energy for building cooling are becoming more and more popular around the world. Reducing energy demand and increasing the renewable energy use can be achieved for example by using radiative cooling. Depending on climatic conditions and the type of cooling system, radiative cooling is able to cover a part of refrigeration needs. The document presents the possible energy yield from using radiative cooling in systems operating at respective parameters in polish climatic conditions.
Powdered keramsite as unconventional method of AGS technology support in GSBR reactor with minimum-optimum OLR
Authors: Czarnota Joanna , Masłoń Adam , Zdeb Monika
Published: July 2018

Aerobic Granular Sludge (AGS) technology becomes a very competitive method to activated sludge system. Its main advantages include: high energy efficiency and low investment costs. Despite this fact, intensive research on biogranulation optimization are still carried out, both at laboratory and technical scale. In order to intensify the AGS technology, new methods of biogranulation and ways of improving the stability of aerobic granules are sought. So far, several studies have been conducted in this area, with using among others: chemical coagulants, dosage fragments of granules and powdered materials. The aim of this study was to evaluate the impact of powdered keramsite on the feasibility of rapid aerobic granulation in a GSBR reactor with a minimum-optimum organic loading rate (OLR). The research presents an effective way of cultivating stable aerobic granules in a Granular Sequencing Batch Reactor (GSBR) under specific technological parameters.
Impact of the energy willow planting density on the canopy architecture in 9thand 10thyear of cultivation
Authors: Dąbrowski Janusz , Styszko Leszek
Published: July 2018

The purpose of the present paper was an assessment of the dynamics of the regrowth of the shoots of 10 genotypes of basket willow (Salix viminalisL.) in the 9thand 10thyear of cultivation on light soil in the Middle Pomerania (16°24’N and 54°8’E) with a diversified planting density of cuttings (15.020, 22.134 and 33.200 pcs. ha-1). The field experiment was established in 2007 with 3 planting densities of willow cuttings, and 10 willow genotypes. In 2016–2017, the regrowth dynamics of willow shoots was assessed separately in the first and second row of the plot. The willow genotype, the planting density of cuttings during the establishment of the plantation, the number of the years of shoot regrowth and variants of shoots mowing had an impact on the willow canopy architecture in the 9thand 10thyear. The reaction of genotypes with the individual parameters of the canopy architecture was not identical.
Innovative composite on the basis of an aerogel mat with an epoxy resin modified with PET waste and PCM
Authors: Dębska Bernardeta , Lichołai Lech , Szyszka Jerzy
Published: July 2018

The article presents a patent proposition of a composite – sandwich panel made of aerogel mat and a composition of encapsulated phase-change material PCM and epoxy resin modified by glycolysis based on poly(ethylene terephthalate) waste. A multifunctional thermal insulation material with a large heat capacity was obtained. This ability makes it possible to limit the temperature fluctuation in the space encased with the composite. In addition, thanks to the use of aerogel mat, which is characterized by much higher thermal insulation than commonly available materials, it is possible to achieve the assumed thermal resistance using more than two times lower thickness of insulation. The combination of aerogel and resin-PCM makes it possible to give the material virtually any shape. After the hardening process is completed, it has incomparably greater tensile, bending and compression strengths than Styrofoam and mineral wool. These features predispose it for use in situations where high thermal insulation is required while maintaining a low thickness of insulation material and a large thermal capacity of the housing material is indicated, e.g. thin divisions used in passive buildings, window joinery elements, engine compartments and cabin components in vehicles, household appliances etc.
Effect of aluminium oxide nanoparticles on the enzymatic activity on microorganisms of activated sludge
Authors: Doskocz Nina , Affek Katarzyna , Załęska-Radziwiłł Monika
Published: July 2018

The increased production and commercial use of nanoparticles (NPs), combined with a lack of regulation regarding their disposal, may result in the unwanted introduction of NPs to wastewater. Wastewater nutrient removal depends on the metabolisms of activated sludge bacteria and their related key enzymes. Therefore, the aim of this work was to determine the effect of aluminium oxide nanoparticles concentrations on the activated sludge enzymatic activity of microorganisms. Tested nanoparticles inhibition cellular respiration in TTC method in the four highest tested concentrations. Moreover, in most samples observed increase dehydrogenase activity. In this study, nano-Al2O3 also caused a clear stimulation of the activity of hydrolytic enzymes microorganisms of activate sludge. Effects of aluminum oxide (compound in bulk forms) on enzymatic activity were different than in the case of the nano from of Al2O3.
The effect of zirconium oxide nanoparticles on dehydrogenase and hydrolytic activity of activated sludge microorganisms
Authors: Doskocz Nina , Affek Katarzyna , Załęska-Radziwiłł Monika
Published: July 2018

The pervasive use of engineered nanoparticles (NPs) in a wide range of fields raises concerns about their potential environmental impacts. The impact of NPs on the activity of enzymes in sewage sludge was examined using model engineered zirconium oxide nanoparticles (nano-ZrO2). Dehydrogenase activity was evaluated with the TTC test and hydrolytic activity with FDA test. In this study an inhibitory or a stimulating effect of NPs on the activity of the enzymes was observed. The levels of inhibition/stimulation of the nano-ZrO2 varied in relation to duration of contact NPs with activated sludge and particle size (nano, bulk).
Municipality’s financial potencial and policy of flood risk management in Poland
Authors: Dumieński Grzegorz , Krzyżanowski Marcin , Tiukało Andrzej
Published: July 2018

For Polish municipalities – basic units of local government (LGU), flood constitutes a significant source of material losses resulting both from flood damages and from the costs of restoring the regular functioning of the municipalities after the disaster is gone. Authors stated a thesis that the municipality, despite its constitutional obligations connected with providing the safety for its citizens, is not capable to bear the financial burden shaping the flood protection system in the basin. It is, however, due to support the flood protection system by strengthening its adaptive potential and adaptive capacity for efficient limitation of adverse consequences of flood. To justify this thesis, the financial condition of the municipalities threatened with flood was compared to the size of potential flood losses for floods of the medium probability of occurrence (p = 1%). Authors have shown that the municipality’s structure, more than its budget size decides about its financial potential. Especially the municipality’s own revenue is an evidence for the determined financial potential, at the same time, it can be a source of the undertaken actions in order to increase the level of the municipality’s adaptability in the context of flood hazard. Conducted analyses allow to shape the flood risk management policy, both at the municipal level and on a national scale.
Comparison heat and mass transfer coefficients in the shell side of the hollow fiber membrane module
Authors: Englart Sebastian
Published: July 2018

The article discusses the theory associated with the determination of total heat and mass transfer coefficients in a membrane module. The equations for determining Nusselt and Sherwood numbers on the shell side of the module are presented. The design of the membrane module and the test bench are also discussed. The convective coefficients of heat and mass transfer on the shell side have been determined on the basis of the measurements. Calculation results obtained from correlation equations were then compared with the results of experimental investigations of convective heat and mass transfer coefficients in the air-water system. The equation is indicated appropriate for use in the case analysed.
Existing state and future opportunities to use selected fuels and alternative propulsion systems in Poland
Authors: Gis Wojciech
Published: July 2018

The article presents the state of existing and future forecasts for a vehicle park equipped with fuel cells in the world. Reference has also been made to the current and future situation in the area of hydrogen refueling infrastructure in the world. The situation in the above-mentioned area in Germany is discussed, which is one of the leading countries in the hydrogenization of motor transport. A proposal for the development of hydrogen propulsion technology in Poland has been presented. In a similar scope, reference is made to the issue of electromobility in road transport, both in the world, in the EU, and in Poland.
Preliminary estimation of groundwater recharge on Brda river outwash plain
Authors: Gumuła-Kawęcka Anna , Szymkiewicz Adam , Jaworska-Szulc Beata , Pruszkowska-Caceres Małgorzata , Gorczewska-Langner Wioletta
Published: July 2018

Estimation of groundwater recharge is one of the most challenging subjects in hydrogeology. It is a critical factor influencing the pollution migration, assessment of aquifer vulnerability to contamination, small-scale groundwater budget calculation, modeling of nutrient cycling and detailed flow path calculations. In Poland an infiltration rate method is widely used, which depends on a system of rate coefficients referring to the type of soil in the vadose zone and shows which part of the precipitation actually reaches the water table. The paper presents results of numerical simulations of vertical flow in unsaturated zone of an experimental site located on Brda outwash plain. Two simulations for varying vegetative cover (pine forest and grass) were performed. The results were compared with five infiltration rates classifications.
Analysis of the water meter management of the urban-rural water supply system
Authors: Gwozdziej-Mazur Joanna , Świętochowski Kamil
Published: July 2018

Water losses in the water supply network pose a continuous challenge for water companies. Already during designing new networks, the designer assumes that the amount of water demand must be increased by a certain percentage (usually by 10% of the total average daily water demand for municipal and industrial purposes) due to the possible occurrence of water losses. Water loss is meant the difference between the amount of water injected into the network and the amount of water used and invoiced, i.e. that brings income for the water supply company. Proper water metering management helps to limit water losses. This paper presents analysis of the water meter management of urban-rural water supply system.
Identifying mechanical ventilation issues in classrooms
Authors: Janiga Julia , Krzempka Joanna , Szczerbińska Aleksandra
Published: July 2018

This article focuses on the issues of indoor air quality in mechanically ventilated classrooms. The aim of the study was to determine the reasons for inadequate air quality reported by occupants. Two different ventilation systems were assessed by measuring CO2 and VOC concentrations in classrooms during operating time. Results showed that in both cases, CO2 levels in the air, even though mostly acceptable, were exceeded throughout the measuring periods on occasion. Based on obtained data, in both cases probable causes for reported ventilation system malfunctions were proposed.