bluuebunny/crossref_metadata_2025 huggingface dataset:
The effects of the dopamine stabilizer (−)-OSU6162 on aggressive and sexual behavior in rodents
Authors: Studer E , Näslund J , Westman A , Carlsson A , Eriksson E
Published: March 2016

The dopamine stabilizer (−)-OSU61612 dampens locomotion in rodents rendered hyperactive by exposure to a novel environment or treatment with amphetamine, but stimulates locomotion in habituated animals displaying low motor activity, tentatively exerting this profile by selectively blocking extrasynaptic D2 receptors. The major aim of the present study was to explore the possible usefulness of (−)-OSU61612 as an anti-aggressive drug. To this end, the effect of (−)-OSU61612 on isolation-induced aggression in male mice and estrous cycle-dependent aggression in female rats were studied using the resident intruder test; in addition, the possible influence of (−)-OSU61612 on sexual behavior in male mice and on elevated plus maze (EPM) performance in male rats were assessed. (−)-OSU61612 at doses influencing neither locomotion nor sexual activity reduced aggression in male mice. The effect was observed also in serotonin-depleted animals and is hence probably not caused by the antagonism of serotonin receptors displayed by the drug; refuting the possibility that it is due to 5-HT1B activation, it was also not counteracted by isamoltane. (−)-OSU61612 did not display the profile of an anxiogenic or anxiolytic drug in the EPM but caused a general reduction in activity that is well in line with the previous finding that it reduces exploratory behavior of non-habituated animals. In line with the observations in males, (−)-OSU61612 reduced estrus cycle-related aggression in female Wistar rats, a tentative animal model of premenstrual dysphoria. By stabilizing dopaminergic transmission, (−)-OSU61612 may prove useful as a well-tolerated treatment of various forms of aggression and irritability.
Genome-wide polygenic scores for age at onset of alcohol dependence and association with alcohol-related measures
Authors: Kapoor M , Chou Y-L , Edenberg H J , Foroud T , Martin N G , Madden P A F , Wang J C , Bertelsen S , Wetherill L , Brooks A , Chan G , Hesselbrock V , Kuperman S , Medland S E , Montgomery G , Tischfield J , Whitfield J B , Bierut L J , Heath A C , Bucholz K K , Goate A M , Agrawal A
Published: March 2016

Age at onset of alcohol dependence (AO-AD) is a defining feature of multiple drinking typologies. AO-AD is heritable and likely shares genetic liability with other aspects of alcohol consumption. We examine whether polygenic variation in AO-AD, based on a genome-wide association study (GWAS), was associated with AO-AD and other aspects of alcohol consumption in two independent samples. Genetic risk scores (GRS) were created based on AO-AD GWAS results from a discovery sample of 1788 regular drinkers from extended pedigrees from the Collaborative Study of the Genetics of Alcoholism (COGA). GRS were used to predict AO-AD, AD and Alcohol dependence symptom count (AD-SX), age at onset of intoxication (AO-I), as well as maxdrinks in regular drinking participants from two independent samples—the Study of Addictions: Genes and Environment (SAGE; n=2336) and an Australian sample (OZ-ALC; n=5816). GRS for AO-AD from COGA explained a modest but significant proportion of the variance in all alcohol-related phenotypes in SAGE. Despite including effect sizes associated with large numbers of single nucleotide polymorphisms (SNPs; >110 000), GRS explained, at most, 0.7% of the variance in these alcohol measures in this independent sample. In OZ-ALC, significant but even more modest associations were noted with variance estimates ranging from 0.03 to 0.16%. In conclusion, there is modest evidence that genetic variation in AO-AD is associated with liability to other aspects of alcohol involvement.
Iodine-mediated etching of gold nanorods for plasmonic sensing of dissolved oxygen and salt iodine
Authors: Zhang Zhiyang , Chen Zhaopeng , Cheng Fangbin , Zhang Yaowen , Chen Lingxin
Published: March 2016

A plasmonic sensing method for detection of dissolved oxygen and salt iodine based on iodine-mediated etching of gold nanorods is developed.
Ru(ii) polypyridyl complex-incorporated and folate-conjugated vehicle for cancer cell imaging and photoinduced inactivation
Authors: Huang Li-Li , Xu Jin , Jin Yong-Jie , Zhao Dong-Xu , Xie Hai-Yan
Published: March 2016

A vehicle of photodynamic reagent [Ru(phen)2(dppz)]2+, which was incorporated into folate-conjugated liposomes, was constructed for the purpose of tumor-specific imaging and photodynamic therapy.
Probing the effects of the ester functional group, alkyl side chain length and anions on the bulk nanostructure of ionic liquids: a computational study
Authors: Fakhraee Mostafa , Gholami Mohammad Reza
Published: March 2016

The effects of ester addition on nanostructural properties of biodegradable ILs.
Isolation of pristine MXene from Nb4AlC3 MAX phase: a first-principles study
Authors: Mishra Avanish , Srivastava Pooja , Mizuseki Hiroshi , Lee Kwang-Ryeol , Singh Abhishek K.
Published: March 2016

Complete chemical transformation of MAX (Nb4AlC3) into pristine MXene (Nb4C3) in the presence of LiF.
Host genetics is associated with the gut microbial community membership rather than the structure
Authors: Zhao Peihua , Irwin David M. , Dong Dong
Published: March 2016

The issue of what factors shape the gut microbiota has been studied for years.
Cycloaddition of CO2to epoxides using di-nuclear transition metal complexes as catalysts
Authors: Wani Mohmmad Y. , Kumar Santosh , Arranja Claudia T. , Dias Carlos M. F. , Sobral Abilio J. F. N.
Published: March 2016

Cycloaddition of CO2to epoxides was carried out selectively using di-nuclear Cu(ii), Co(ii) or Ni(ii)/n-Bu4NI catalyst system with high turnover frequency.
Glutathione-directed synthesis of Cr(vi)- and temperature-responsive fluorescent copper nanoclusters and their applications in cellular imaging
Authors: Kong Lingcan , Chu Xuefeng , Liu Wenwei , Yao Yuyang , Zhu Pengfei , Ling Xia
Published: March 2016

Highly red luminescent GSH–Cu nanoclusters were synthesized and could be used as nanosensors for Cr(vi) ions and temperature.
Structure, phase transition and negative thermal expansion in ammoniated ZrW2O8
Authors: Cao Weigang , Huang Qingzhen , Rong Yangchun , Wang You , Deng Jinxia , Chen Jun , Xing Xianran
Published: March 2016

The local structural changes of ZrW2O8 after ammoniation treatment.
Potential hepatoprotective effects of fullerenol nanoparticles on alcohol-induced oxidative stress by ROS
Authors: Li Y. , Luo H. B. , Zhang H. Y. , Guo Q. , Yao H. C. , Li J. Q. , Chang Q. , Yang J. G. , Wang F. , Wang C. D. , Yang X. , Liu Z. G. , Ye X.
Published: March 2016

The free radical scavenging ability of fullerenols is their most exploited property in biomedical studies.
Understanding the effects of carboxylated groups of functionalized graphene oxide on the curing behavior and intermolecular interactions of benzoxazine nanocomposites
Authors: Xu Qingyu , Zeng Ming , Feng Zijian , Yin Die , Huang Yiwan , Chen Yin , Yan Chunjie , Li Ranran , Gu Yi
Published: March 2016

Novel benzoxazine (BOZ)/carboxylated graphene oxide (GO-COOH) composites were prepared via in situ intercalative polymerization.
Dynamic acidity in defective UiO-66
Authors: Ling Sanliang , Slater Ben
Published: March 2016

The metal–organic framework (MOF) material UiO-66 has emerged as one of the most promising MOF materials due to its thermal and chemical stability and its potential for catalytic applications. We refine a recent experimental determination of the missing linker defect structure using static and dynamic first principles approaches, which reveals a dynamic and labile acid centre that could be tailored for functional applications in catalysis.
Propylene/propane selective mixed matrix membranes with grape-branched MOF/CNT filler
Authors: Lin Rijia , Ge Lei , Diao Hui , Rudolph Victor , Zhu Zhonghua
Published: March 2016

High propylene/propane separation membranes containing grape-branched MOFs/CNTs as filler with improved MOF dispersion and filler/polymer interface.
Hybrid lanthanide nanoparticles as a new class of binary contrast agents for in vivo T1/T2 dual-weighted MRI and synergistic tumor diagnosis
Authors: Yi Zhigao , Li Xiaolong , Lu Wei , Liu Hongrong , Zeng Songjun , Hao Jianhua
Published: March 2016

A new class of hybrid lanthanide nanoparticles has been demonstrated as synergistic contrast agents in T1/T2 dual-weighted MRI and imaging-directed tumor diagnosis.
Highly stable copper wire/alumina/polyimide composite films for stretchable and transparent heaters
Authors: Li Peng , Ma Jiangang , Xu Haiyang , Xue Xiaodan , Liu Yichun
Published: March 2016

Thermal, electrical and mechanical stabilities of a Cu wire-based transparent heater are improved by coating alumina and polymide films.
A novel approach for precisely controlled multiple cell patterning in microfluidic chips by inkjet printing and the detection of drug metabolism and diffusion
Authors: Zhang Jie , Chen Fengming , He Ziyi , Ma Yuan , Uchiyama Katsumi , Lin Jin-Ming
Published: March 2016

A novel platform for precise cell patterning and analysis in microchips was developed by combining inkjet cell-printing and microfluidic chips.
Recent developments in rhodamine salicylidene hydrazone chemosensors
Authors: Yang Yang , Gao Chao-Ying , Liu Jinglin , Dong Dewen
Published: March 2016

This review article focuses mainly on advances in the field of salicylidene based rhodamine hydrazone chemosensors, concerning the spirolactam ring-opening sensing mechanism that has been developed in the last decade.
Dynamic covalent assembly and disassembly of nanoparticle aggregates
Authors: Borsley Stefan , Kay Euan R.
Published: March 2016

A new type of dynamic covalent nanoparticle (NP) building block is reported, exhibiting rapid constitutional adaptation in a NP-bound monolayer of boronate esters, and formation of covalently linked NP assemblies, which despite being connected by covalent bonds, can be fully disassembled on application of a chemical stimulus.
Glycomimetic-based pharmacological chaperones for lysosomal storage disorders: lessons from Gaucher, GM1-gangliosidosis and Fabry diseases
Authors: Sánchez-Fernández Elena M. , García Fernández José M. , Mellet Carmen Ortiz
Published: March 2016

Recent advancements and future outlook on pharmacological chaperones for lysosomal storage disorders using glycomimetics are discussed.
Binding of chemical warfare agent simulants as guests in a coordination cage: contributions to binding and a fluorescence-based response
Authors: Taylor Christopher G. P. , Piper Jerico R. , Ward Michael D.
Published: March 2016

Alkyl phosphonates bind in the cavities of cubic coordination cages via a range of supramolecular interactions and cause a luminescence quenching response.
Flux growth and 266 nm generation of a GdAl3(BO3)4 crystal
Authors: Zhu Yangyang , Yue Yinchao , Tu Heng , Zhao Ying , Hu Zhanggui
Published: March 2016

The study focused on optimization of the growing conditions of GdAl3(BO3)4 (GAB).
Effects of CO and CO2 on the desulfurization of H2S using a ZnO sorbent: a density functional theory study
Authors: Ling Lixia , Zhao Zhongbei , Wang Baojun , Fan Maohong , Zhang Riguang
Published: March 2016

The formation of COS via the reaction of CO and H2S is easier than that of CO2 and H2S over the ZnO surface.
Occurrence, spatiotemporal distribution, mass balance and ecological risks of antibiotics in subtropical shallow Lake Taihu, China
Authors: Zhou Li-Jun , Wu Qinglong L. , Zhang Bei-Bei , Zhao Yong-Gang , Zhao Bi-Ying
Published: March 2016

The objective of this study was to evaluate the occurrence, spatiotemporal distribution, mass balance and ecological risks of 43 commonly used human and veterinary antibiotics in both aqueous and sedimentary phases in a large subtropical shallow lake, Lake Taihu.
Dendrimer-like core cross-linked micelle stabilized ultra-small gold nanoclusters as a robust catalyst for aerobic oxidation of α-hydroxy ketones in water
Authors: Yu Yangyang , Lin Chenlu , Li Bing , Zhao Pengxiang , Zhang Shiyong
Published: March 2016

Dendrimer-like core cross-linked micelle stabilized gold clusters furnish excellent activity and reusability for aerobic oxidation of α-hydroxy ketones in water.
A recyclable Mn–porphyrin catalyst for enantioselective epoxidation of unfunctionalized olefins using molecular dioxygen
Authors: Farokhi Afsaneh , Hosseini-Monfared Hassan
Published: March 2016

A highly efficient green process for the asymmetric epoxidation of olefins by an easy to synthesise Mn–porphyrin and O2/aldehyde is reported.
Pd(0)-catalyzed cross-coupling of allyl halides with α-diazocarbonyl compounds or N-mesylhydrazones: synthesis of 1,3-diene compounds
Authors: Wang Kang , Chen Shufeng , Zhang Hang , Xu Shuai , Ye Fei , Zhang Yan , Wang Jianbo
Published: March 2016

An efficient method for the synthesis of 1,3-butadiene derivatives based on Pd-catalyzed cross-coupling with allyl bromides or chlorides with α-diazocarbonyl compounds or N-mesylhydrazones is presented.
Highly infrared-transparent and p-type conductive CuSc1−xSnxO2 thin films and a p-CuScO2:Sn/n-ZnO heterojunction fabricated by the polymer-assisted deposition method
Authors: Chuai Yahui , Wang Xin , Zheng Chuantao , Zhang Yu , Shen Hongzhi , Wang Yiding
Published: March 2016

We fabricated a series of infrared (IR)-transparent and conductive Sn-doped CuScO2 thin films using a polymer-assisted deposition (PAD) method.
Imidazolium functionalized polysulfone electrolyte membranes with varied chain structures: a comparative study
Authors: Zhang Baoqiang , Li Lingdong , He Gaohong , Gai Fangyuan , Zhang Fengxiang
Published: March 2016

Backbone structure significantly influences conductivity and alkali stability of imidazolium functionalized polysulfone anion exchange membranes (AEM).
Epitaxial growth and nanoscale electrical properties of Ce2Ti2O7thin films
Authors: Bayart Alexandre , Shao ZhenMian , Ferri Anthony , Roussel Pascal , Desfeux Rachel , Saitzek Sébastien
Published: March 2016

Growth and ferroelectric properties of Ce2Ti2O7thin films.
A rapid and sensitive profiling of free fatty acids using liquid chromatography electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) after chemical derivatization
Authors: Mok Hyuck Jun , Lee Jae Won , Bandu Raju , Kang Hong Seok , Kim Kyun-Hwan , Kim Kwang Pyo
Published: March 2016

A mass spectrometry method for the improved identification and quantification of free fatty acids (FFAs) based on derivatization using trimethylsilyldiazomethane (TMSD) was developed and validated to be an sensitive and accurate method for analyzing FFAs.
Inhibition of the excited-state Rose Bengal (RB) nonradiative process by introducing DMSO for highly efficient photocatalytic hydrogen evolution
Authors: Jiao Wenjun , Wu Yuqi , Lu Gongxuan , Jing Huanwang
Published: March 2016

The addition of a small amount of DMSO could suppress the deprotonation of excited-state RB nonradiative process caused by proton-induced quenching, which greatly improved the hydrogen evolution performance in RB-sensitized photocatalytic system.
Improving the efficiency of inverted organic solar cells by introducing ferrocenedicarboxylic acid between an ITO/ZnO interlayer
Authors: Li Bairu , Jiu Tonggang , Kuang Chaoyang , Chen Qiushan , Ma Sushuang , Li Jiangsheng , Hou Xueling , Fang Junfeng
Published: March 2016

PSCs with the best efficiency of 9.06% were successfully fabricated by inserting ferrocenedicarboxylic acid (FDA) between an ITO/ZnO interlayer.
Synthesis and characterization of highly defective mesoporous carbon and its potential use in electrochemical sensors
Authors: Mohammadi Nourali , Adeh Narmin Bahrami , Najafi Mostafa
Published: March 2016

A highly defective mesoporous carbon (DMC) was synthesized via a facile mass producible method for the fabrication of electrochemical sensing devices.
Ruthenium-catalysed C-alkylation of 1,3-dicarbonyl compounds with primary alcohols and synthesis of 3-keto-quinolines
Authors: Cini Elena , Petricci Elena , Truglio Giuseppina I. , Vecchio Marialaura , Taddei Maurizio
Published: March 2016

Mono alkylation of 1,3-dicarbonyls is now possible with alcohols and catalytic amount of Hantzsch ester under Ru catalysis.
Polymeric Gd-DOTA amphiphiles form spherical and fibril-shaped nanoparticle MRI contrast agents
Authors: Randolph Lyndsay M. , LeGuyader Clare L. M. , Hahn Michael E. , Andolina Christopher M. , Patterson Joseph P. , Mattrey Robert F. , Millstone Jill E. , Botta Mauro , Scadeng Miriam , Gianneschi Nathan C.
Published: March 2016

A Gd3+-coordinated polymerizable analogue of the MRI contrast agent Gd-DOTA was used to prepare amphiphilic block copolymers, with hydrophilic blocks composed entirely of the polymerized contrast agent.
Electrochemically activated-iron oxide nanosheet arrays on carbon fiber cloth as a three-dimensional self-supported electrode for efficient water oxidation
Authors: Yan Feng , Zhu Chunling , Wang Shuo , Zhao Yang , Zhang Xitian , Li Chunyan , Chen Yujin
Published: March 2016

Electrochemically activated-3D self-supported electrodes composed of iron oxide nanosheets and carbon fiber cloth exhibited superior activity and long-term stability toward the oxygen evolution reaction.
3D hierarchical porous ZnO/ZnCo2O4nanosheets as high-rate anode material for lithium-ion batteries
Authors: Xu Xiaohong , Cao Kangzhe , Wang Yijing , Jiao Lifang
Published: March 2016

The superior cycling performance of the ZZCO nanosheet electrode benefits from the excellent structural stability.
Carbon-coated mesoporous silicon microsphere anodes with greatly reduced volume expansion
Authors: Xu Zheng-Long , Gang Yang , Garakani Mohammad Akbari , Abouali Sara , Huang Jian-Qiu , Kim Jang-Kyo
Published: March 2016

The harmful pulverization and ensuing poor cyclic stability of Si anodes are successfully addressed by mesoporous Si/C microspheres with greatly reduced volume expansion.
Rationally designed two-photon absorption compounds based on benzoxazole derivatives: structure–property relationships and bio-imaging applications
Authors: Ge Xinping , Gan Xiaoping , Yao Shun , Wang Kang , Zhu Weiju , Yu Jianhua , Wu Jieying , Tian Yupeng , Zhou Hongping
Published: March 2016

Five rationally designed benzoxazole-based two photon absorption compounds were reported and their structure–property relationships were summarized clearly.
Nd3+sensitized dumbbell-like upconversion nanoparticles for photodynamic therapy application
Authors: Xu Bing , Zhang Xiao , Huang Wenjuan , Yang Yijun , Ma Ying , Gu Zhanjun , Zhai Tianyou , Zhao Yuliang
Published: March 2016

Dumbbell-like structured NaYF4:Yb/Er@NaNdF4:Yb upconversion nanoparticles are fabricated and have potential in photodynamic therapy (PDT).
Anticoagulant sodium alginate sulfates and their mussel-inspired heparin-mimetic coatings
Authors: Ma Lang , Cheng Chong , Nie Chuanxiong , He Chao , Deng Jie , Wang Lingren , Xia Yi , Zhao Changsheng
Published: March 2016

We synthesized novel sodium alginate sulfates (SASs) with different sulfation degrees. All the SASs, DA-g-SASs, and coated substrates had good anticoagulant properties and biocompatibilit.
Triethylenetetramine modulates polyamine and energy metabolism and inhibits cancer cell proliferation
Authors: Hyvönen Mervi T. , Ucal Sebahat , Pasanen Markku , Peräniemi Sirpa , Weisell Janne , Khomutov Maxim , Khomutov Alex R. , Vepsäläinen Jouko , Alhonen Leena , Keinänen Tuomo A.
Published: March 2016

Polyamine metabolism is an attractive anticancer drug target, since polyamines are absolutely required for cellular proliferation, and increased levels of polyamines and their biosynthetic enzyme ornithine decarboxylase (ODC) are associated with cancer. Triethylenetetramine (TETA) is a charge-deficient isosteric analogue of the polyamine spermidine (Spd) and a Cu(II)-chelating compound used for the treatment of Wilson's disease, and it has been implicated as a potential anticancer therapeutic drug. In the present study, we studied the effects of TETA in comparison with two other Cu(II)-chelators, D-penicillamine (PA) and tetrathiomolybdate (TTM), on polyamine metabolism in DU145 prostate carcinoma, MCF-7 breast carcinoma and JEG-3 choriocarcinoma cells. TETA induced antizyme, down-regulated ODC and inhibited [14C] Spd uptake. Moreover, it completely prevented α-difluoromethylornithine (DFMO)-induced increase in [14C] Spd uptake, and inhibited [14C] putrescine (Put) uptake and ODC activity in vivo. Seven-day treatment of DU145 cells with TETA caused growth cessation by reducing intracellular polyamine levels and suppressing the formation of hypusinated eukaryotic translation initiation factor 5A (eIF5A). TETA or its N-acetylated metabolites also inhibited spermine (Spm), diamine and semicarbazide-sensitive amine oxidases and decreased the level of intracellular reactive oxygen species. Moreover, TETA inhibited the utilization of Put as energy source via the tricarboxylic acid (TCA) cycle, as indicated by decreased production of 14CO2 from [14C] Put. These results indicate that TETA attacks multiple proven anticancer drug targets not attributed to copper chelation, which warrants further studies to reveal its potential in cancer chemoprevention and cure.
Third‐octave power amplifier using ring based matching network with high efficiency
Authors: Qi Tian , He Songbai , Shi Weimin
Published: March 2016

A power amplifier (PA) output matching network (OMN) based on the ring structure network is proposed to design multi‐octave wide band PA. The characteristics of ring structure and micro‐strip are analysed. For verification, validate the proposed structure, a multi‐octave wide band PA operating ranges 0.5−4.4 GHz over three octaves is fabricated and measured, with the minimum power added efficiency over 48%, output power (Pout) over about 40 dBm and 9.5−11.5 dB power gain are achieved during the operating frequency band. Comparison with reported over octave PAs are given.
Memory‐efficient parallel string matching scheme using distributed pattern grouping without matching vectors
Authors: Kim HyunJin
Published: March 2016

A memory‐efficient bit‐split deterministic finite automata (DFAs)‐based string matching scheme with multiple string matchers is proposed. When multiple patterns can be matched in bit‐split DFAs, the matching vector is required for a state to indicate which patterns are matched. In the proposed scheme, patterns are iteratively grouped into multiple unique sets of patterns using the graph colouring of a unique graph. Since a pattern cannot be a suffix of other patterns in a bit‐split DFA, only one pattern can be matched in a string matcher. Therefore, in order to reduce the hardware overhead, the matching vector can be removed in each string matcher. Compared with other previous works, the memory requirements are reduced by 45.3–11.2% on average.
Synthesis and electrical characterisation of vanadium oxide thin film thermometer for microbolometer applications
Authors: Zia M.F. , Abdel‐Rahman M. , Alduraibi M. , Ilahi B. , Alasaad A.
Published: March 2016

A low cost, CMOS‐compatible, and easily implementable method is presented for the synthesis of a thin film thermometer material for microbolometer applications. The thin film thermometer material was prepared by sputter depositing 11 alternative layers of vanadium pentoxide and vanadium followed by post‐deposition annealing of the deposited structure in O2 atmosphere at 300°C. The synthesised thin film thermometers showed a maximum temperature coefficient of resistance of −2.92%/oC and a minimum resistivity 0.161 Ω cm.
Quad‐band bandpass filter based on single stepped‐impedance ring resonator
Authors: Xiao Mi , Li Xiaozheng , Sun Guoliang
Published: March 2016

A novel compact quad‐band bandpass filter (BPF) using a single stepped‐impedance ring loaded resonator (SIRLR) is introduced. Different from other multi‐mode resonators proposed recently, the SIRLR generates two transmission poles (TPs) on each passband of the BPF so that a quad‐band BPF can be realised using only one resonator. Due to the multipath structure, three transmission zeros (TZs) are created between passbands, resulting in the improvement of band‐to‐band isolation. TPs and TZs are carefully controlled and adjusted by tuning electric length and impedance of the SIRLR to satisfy the demands of proposed quad‐band BPF. The proposed filter was fabricated and just occupied 0.18λg × 0.15λg. The results of simulations and measurements agree very well.
Ultra‐energy‐efficient temperature‐stable physical unclonable function in 65 nm CMOS
Authors: Tao S. , Dubrova E.
Published: March 2016

Physical unclonable functions (PUFs) are promising hardware security primitives suitable for resource‐constrained devices requiring lightweight cryptographic methods. This Letter proposes an ultra‐low‐power and reliable PUF based on a customised dynamic two‐stage comparator operating in the sub‐threshold region. The proposed PUF is implemented in a standard 65 nm CMOS technology and validated through Monte‐Carlo simulations. Evaluation results show a worst‐case reliability of 98.3% over the commercial temperature range of 0°C to 85°C and 10% fluctuations in supply voltage. In addition, the 128‐bit PUF array consumes only 1.33 μW at 1 Mb/s, which corresponds to 10.3 fJ/bit, being the most energy‐efficient design to date.
Capacity of Fox's H‐function fading channel with adaptive transmission
Authors: Abo Rahama Y. , Ismail M.H. , Hassan M.S.
Published: March 2016

Novel closed‐form exact expressions for the capacity of the recently‐introduced Fox's H‐function fading channel are derived. The expressions are obtained assuming different types of adaptive transmission strategies, namely, channel inversion with fixed rate, truncated channel inversion with fixed rate, optimum rate adaptation with fixed power and optimum power and rate adaptation. The obtained expressions are versatile and can be used to evaluate the capacity for virtually any fading channel one might be interested in as a special case.
Dynamic femtocell resource allocation for managing inter‐tier interference in downlink of heterogeneous networks
Authors: Saeed Arsalan , Katranaras Efstathios , Dianati Mehrdad , Imran Muhammad Ali
Published: March 2016

This study investigates the downlink resource allocation problem in orthogonal frequency division multiple access heterogeneous networks consisting of macrocells and femtocells sharing the same frequency band. The focus is to devise optimised policies for femtocells' access to the shared spectrum, in terms of femtocell transmissions, in order to maximise femto‐users (FUEs) sum data rate while ensuring that certain level of quality of service (QoS) for the macro‐cell users in the vicinity of femtocells is provided. The optimal solution to this problem is obtained by employing the well‐known dual Lagrangian method and the optimal femtocell transmit power and resource allocation solution is derived in detail. However, the optimal solution introduces high computational complexity. To this end, a heuristic solution to the problem is proposed. The algorithms to implement both optimal and efficient suboptimal schemes in a practical system are also given in detail while their complexity is compared. Simulation results show that proposed dynamic resource allocation scheme (a) ensures the macro‐users QoS requirements compared with the Reuse‐1 scheme, where femtocells are allowed to transmit at full power and bandwidth; (b) can maintain FUE data rates at high levels; (c) provides performance close to the optimal solution, while introducing much lower complexity.
Performance analysis of zero‐forcing‐based multiple‐input multiple‐output two‐way relaying in overlay device‐to‐device communications
Authors: Singh Gurjar Devendra , Upadhyay Prabhat Kumar
Published: March 2016

In this study, the authors conduct the performance evaluation and resource allocation for two‐way multiple‐input multiple‐output‐based device‐to‐device (D2D) communications overlaying a cellular network. The considered system model comprises of a base station, a mobile user, and a pair of D2D users, where each of them is equipped with multiple antennas and employs transmit/receive zero forcing. Based on overlaying approach, both D2D and cellular communications take place bidirectionally by employing analogue network coding with a best selected D2D user as two‐way relay for the cellular links. The authors analyse the outage performance of cellular and D2D systems in a Rayleigh fading environment. They also deduce asymptotic outage behaviour of cellular system and highlight the achievable diversity order. In addition, they derive the expressions of ergodic sum rate for both the systems. Above all, they provide a selection algorithm for the best relaying D2D user and describe feasible range of power splitting factor to maximise the data rate of cellular system for a given data rate of D2D system. Numerical and simulation results validate the authors’ theoretical findings and illustrate the performance gains of the considered scheme under various antenna configurations.
Improved scheme for the problem of anti‐fading of DSRC systems in IEEE 802.11p environments
Authors: Ma Tian‐Ming
Published: March 2016

Vehicular communication for accident avoidance is an important application defined in the IEEE 802.11p. One of the challenges of vehicular communications in the current IEEE 802.11p standard is the complex and rapidly changing channel conditions. In this study, the author focusses on the vehicle‐to‐vehicle channels under the IEEE 802.11p standard and point out that there exist two different kinds of fading. Then, a new dedicated short range communication (DSRC) system with two improved methods is proposed for the weak performance of anti‐fading of current system in IEEE 802.11p environments. The author adopts matrix spectral transformation method to replace least squares algorithm in spectral temporal averaging (STA) scheme proposed by Fernandez to further mitigate the negative effects of DSRC system caused by fast time‐varying fading. Meanwhile, the author also proposes a spectral keying method to further enhance its ability of anti‐frequency‐selective fading. The final simulation results show that compared with STA and other methods, the improved scheme shows better performance on mean square error, bit error rate and packet error rate, which is promising for practical applications.
Utility‐based opportunistic spectrum access for cognitive radio sensor networks: joint spectrum sensing and random access control
Authors: Zheng Meng , Liang Wei , Yu Haibin , Sharif Hamid
Published: March 2016

This study formulates a novel optimisation problem for joint spectrum sensing and random access control (JS2RAC) in cognitive radio sensor networks (CRSNs). The JS2RAC is formulated as a network utility maximisation problem, which aims to maximise the sum of utilities over all links in the network but subject to the primary user protection constraint, the energy constraint, and the physical constraint. Due to the non‐separable and non‐convex nature of the JS2RAC problem, the authors propose a primal‐decomposition‐based iterative (PDI) algorithm which decomposes the JS2RAC problem into a spectrum sensing subproblem and a random access control subproblem, and solve the two subproblems iteratively. Then, the authors prove the convergence of the PDI algorithm and show its distributed implementation in practice. Simulations demonstrate the fast convergence and the near‐optimal nature of the PDI algorithm and show its significant improvement in the network utility of CRSNs in comparison with the method of optimising spectrum sensing and random access separately.
Blind carrier frequency offset estimation for single carrier and orthogonal frequency division multiplexing signals using least‐order cyclic moments
Authors: Yang Ding , Si Jiangbo , Li Zan , Beaulieu Norman C. , Zhu Jianfeng , Zhou Fuhui , Hao Benjian
Published: March 2016

A definition of least cyclostationary order (LCO) is proposed based on the inner cyclic period of single carrier and orthogonal frequency division multiplexing (OFDM) signals. The LCOs of single carrier and OFDM signals are derived. Since the LCO has a relationship with the carrier frequency offset (CFO), a blind CFO estimation scheme for single carrier and OFDM signals can be proposed. The novel scheme is entirely blind without any priori information and is proved to be the same as cumulants estimation when the LCO is known. However, the new scheme is superior to the estimation based on cumulant when the LCO is unknown. The mean‐square error of M‐phase shift keying signals approaches the Cramér–Rao bound in additive white Gaussian noise (AWGN) channel. Simulation results are given to verify the effectiveness of the proposed blind estimation scheme in Rician fading channel and in AWGN channel.
Comprehensive decision‐making method considering voltage risk for preventive and corrective control of power system
Authors: Li Shuaihu , Li Yong , Cao Yijia , Tan Yi , Jiang Lin , Keune Björn
Published: March 2016

This study proposes a comprehensive decision‐making method considering voltage risk to coordinate preventive and corrective control for voltage stability of power system. The voltage risk is quantified in the form of economic index with considering the uncertainty of postulated contingencies. Then, a non‐linear optimisation model with the objective of minimising voltage risk is performed to coordinate the preventive and corrective control. The positive constraint relaxation algorithm (PCRA) is presented to determine the integrated countermeasures. Based on the principle of PCRA, the failure with the smallest severity factor in the set of preventive fault is selected as an emergency fault. With the changes of the fault sets, the voltage risk and the countermeasures are recalculated until that the risk is no longer reduced for the expected contingencies. The proposed method is significant not only to achieve the optimum balance between the security and economy of stability control, but also improve the decision efficiency. Finally, the proposed method is demonstrated on the New‐England 39‐bus system, and the results validate the effectiveness of the proposed method.
Neoteric HANFISC–SSSC based on MOPSO technique aimed at oscillation suppression of interconnected multi‐source power systems
Authors: Falehi Ali Darvish , Mosallanejad Ali
Published: March 2016

Alleviating dynamic oscillations of the tie‐line power exchange and area frequencies in affected interconnected power systems caused by loading condition changes is the prominent responsibility of automatic generation control (AGC). To compensate such the load‐changes and also suppress these oscillations, the application of the flexible AC transmission systems (FACTS) can be assigned as one of the practical and effective approaches. In this study, the static synchronous series compensator (SSSC) which is one the series FACTS families is engaged to enhance the overall dynamic performance of multi‐area multi‐source interconnected power system. Likewise, accomplished endeavours in this regard are led to exude the hierarchical adaptive neuro fuzzy inference system controller–SSSC (HANFISC–SSSC) to suppress both prominent issues in multi‐area interconnected power systems i.e.: the low frequency oscillations and the tie‐line power exchange deviations. Hereof also, implementation of multi‐objective optimisation technique is not avoidable. Due to high efficiency of multi objective particle swarm optimisation (MOPSO) to unravel the non‐linear objectives, it has been used to solve the optimisation problem. To verify the high performance of suggested HANFISC–SSSC, two different multi‐area interconnected power systems i.e.: two‐area hydro–thermal–diesel and three‐area hydro–thermal power systems have been considered for this study. In the interim, the capability of HANFISC–SSSC has been perfectly and precisely evaluated and compared with conventional SSSC by incidence of the step load perturbation in all areas of both the test power systems. To sum up, the simulations results obtained from both the power systems have transparently corroborated high performance of HANFISC–SSSC compared with conventional SSSC.
Value of corrective network security for distributed energy storage applications
Authors: Moreira Roberto , Moreno Rodrigo , Strbac Goran
Published: March 2016

Energy storage can provide services to several sectors in electricity industry, including generation, transmission and distribution, where conflicts and synergies may arise when storage is used to manage network congestion and provide services in energy and balancing markets. In this context, this study proposes an optimisation model to coordinate multiple services delivered to various market participants that uses corrective actions to resolve conflicts between provision of distribution network services (e.g. congestion and security of supply) and other services. The model maximises storage profit by scheduling active and reactive power to provide portfolio of services including distribution network congestion management, energy price arbitrage, frequency response and reserve services remunerated at different prices. The authors demonstrate that adopting corrective security to provide network services and deal with network congestion in a post‐fault fashion, is overall more beneficial despite the energy needed to be stored during pre‐fault conditions for applying post‐contingency actions right after a network fault occurs. Furthermore, the authors’ analysis shows that application of corrective security can benefit both (i) storage owners through increased revenues in energy and balancing services markets and (ii) Distribution Network Operators through reduction in payments to storage owners and increased utilisation of network infrastructure.
Optimal place, size, and operation of combined heat and power in multi carrier energy networks considering network reliability, power loss, and voltage profile
Authors: Pazouki Samaneh , Mohsenzadeh Amin , Ardalan Shahab , Haghifam Mahmoud‐Reza
Published: March 2016

Distributed energy resources play a substantial role in today's electrical distribution networks. Combined heat and power (CHP) is a great example of the technologies with potential of combining different energy infrastructures such as gas and electricity. In this study, optimal planning (placing and sizing) of CHPs at arbitrary nodes within a system containing an electrical and natural gas network is considered. Energy hub (EH) approach is employed in order to calculate the energy consumption (operation) of each bus along with its relevant costs. CHP is optimally planned (placed and sized) at the network by considering the operation costs, power loss, network reliability, and voltage penalty. Simulation is carried out on a 33 bus radial distribution system containing electrical and gas networks. The network is integrated by wind and energy storage in some electrical buses. Genetic algorithm of Matlab and Cplex solver of GAMS are used to solve the optimisation problem. The results show that optimal planning of the CHPs reduces total costs, operation costs, network reliability, power loss, and voltage penalty by 9.4, 10.8, 15.4, 16.8, and 10.1%, respectively. The results also show operation of the formed EHs at the arbitrary nodes with optimal planning of the CHPs.
Maiden application of hybrid pattern search‐biogeography based optimisation technique in automatic generation control of a multi‐area system incorporating interline power flow controller
Authors: Rahman Asadur , Saikia Lalit Chandra , Sinha Nidul
Published: March 2016

This study exhibits the automatic generation control (AGC) of an unequal three‐area thermal system having single reheat turbine, generation rate constraint, and governor dead band, in all areas. A three‐degree‐of‐freedom proportional–integral–derivative (3DOF‐PID) controller is used as secondary controller in all the areas and its dynamic performance is compared with that of classical PI, ID, and PID controllers. The controller parameters are simultaneously optimised using biogeography‐based optimisation (BBO) technique, where 3DOF‐PID controller outperforms the other. A hybrid pattern search BBO (hPS‐BBO) technique is applied for the first time in AGC, to simultaneously optimise 3DOF‐PID controller parameters. Comparison of dynamic responses corresponding to BBO and hPS‐BBO optimised 3DOF‐PID controller gives better performance of the latter. This is also validated with random disturbance. The considered system is checked for optimal location of interline power flow controller (IPFC) using BBO optimised 3DOF‐PID controller. Observations reveal that IPFC placed between Line1 and Line3 is the optimal location. A comparatively better response is observed with hPS‐BBO optimised 3DOF‐PID controller parameters, having IPFC placed in its optimal location. Sensitivity analysis of the hPS‐BBO optimised 3DOF‐PID controller parameters is tested and found satisfactory for variations in system loading and inertia constant H.
Modification of enhanced distorted Born iterative method for the 2D inverse problem
Authors: Zheng Hu , Wang Chao , Li En
Published: March 2016

This study presents a modified method based on the enhanced distorted Born iterative method for solving the 2D inverse problem. The proposed method overcomes two shortcomings of the enhanced distorted Born iterative method: (i) the regularisation parameter has to be determined artificially beforehand; (ii) The effects of the two regularisation processes in the enhanced distorted Born iterative method are redundant. The synthetic numerical reconstruction results, as well as the experimental reconstruction results, show that the proposed algorithm is capable and efficient for solving the 2D inverse scattering problem.
Design of dual‐band cavity‐backed slot antenna loaded with spurline
Authors: Hung Chichang , Chiu Tsenchieh
Published: March 2016

A design of dual‐band cavity‐backed slot antenna loaded with a spurline is presented for GPS and S‐band radar applications. In the design, a very thin cavity (0.017 in thickness at 1.575 GHz) is used to achieve unidirectional radiation. The dual‐band responses of the antenna are excited by the slot resonance at 1.575 GHz and waveguide transition effect at 2.4 GHz. Reasonable impedance bandwidths are obtained as 1.6% (26 MHz) at 1.575 GHz and 8.4% (203 MHz) at 2.4 GHz. The proposed slot can also be loaded with a spurline to adjust the antenna centre frequency and the phase of the radiated field. A switch using a PIN diode is deployed with the spurline. It is found that the spurline and the corresponding bias circuit for the PIN diode have little effect on the antenna radiation. Two proposed slots are combined to form an antenna which is right‐hand circularly‐polarised at both 1.575 and 2.4 GHz. A phase delaying system consisting of delay line and the spurline is designed to achieve 90° phase difference at both frequencies. The measured axial‐ratio bandwidths are 1.5% (24 MHz) at 1.575 GHz and 4.5% (110 MHz) at 2.4 GHz, which are sufficient for practical applications.
Polarisation diversity cavity back reconfigurable array antenna for C‐band application
Authors: Karamzadeh Saeid , Rafii Vahid , Saygin Hasan , Kartal Mesut
Published: March 2016

A new circularly polarised broadband multiple‐input–multiple‐output antenna array designed for wireless communication in C‐band is presented. Some reconfigurable circularly polarised antenna designs based on the polarisation diversity technique have been previously reported. However, most of such designs have the disadvantages of an increased antenna size, reduced gain and decreased axial ratio (AR) bandwidth (BW). The proposed antenna in this work combines a low profile cylindrical cavity back, a parasitic patch and a reconfigurable antenna in a novel structure in order to increase the impedance, 3 dB ARBWs and the gain. Another important feature of the antenna is its polarisation diversity capability by employing PIN diodes in a broadband feed network composed of 90° and 180° couplers, a crossover and delay lines.
Study on the theory and method of vortex‐electromagnetic‐wave‐based radar imaging
Authors: Liu Kang , Cheng Yongqiang , Li Xiang , Wang Hongqiang , Qin Yuliang , Jiang Yanwen
Published: March 2016

Helical phase fronts and orbital angular momentum of the vortex electromagnetic (EM) wave are applied to radar imaging at microwave frequencies and comprehensive simulations are conducted. Results demonstrate that an incrementally phased uniform circular array can be exploited to generate vortex EM wave at microwave frequencies. The imaging model based on the linear frequency modulation signal is established and the pulse‐compression and fast Fourier transform methods are used to image the target in both range and azimuth dimensions. Furthermore, antenna pattern optimisation methods for imaging are studied to enhance the directivity of the emitting signal. The work can promote the significant development of novel information‐rich radar imaging technology and provide staring imaging with substantial technical supports.
Microstructural characteristics of SrTiO3 nanoparticles: the role of capping ligand concentration
Authors: Bangi Uzma K.H. , Prakshale Vipul M. , Han WooJe , Park Hyung‐Ho , Maldar Noor Mahmad N. , Deshmukh Lalasaheb P.
Published: March 2016

The role of capping ligand concentration on the microstructural characteristics of strontium titanate (SrTiO3 or STO) nanoparticles has been investigated. Capping the surface of primary particles with ligand having long alkyl chain protects the increase in nanoparticle size by hindering the agglomeration. Therefore, in the present work the role of ligands namely cetyltrimethyl ammonium bromide (CTAB) and polyvinylpyrrolidone (PVP) on the structure and surface morphology of STO have been studied by varying their concentrations from 0.01 to 0.08 M and 0.001 to 0.008 M respectively. The structure of STO was determined using the X‐ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. The surface morphologies of the different STO samples were viewed through the field emission scanning electron microscopy (FESEM). A cubic crystalline phase formation of STO has been observed as revealed from the XRD and TEM images. The typical crystallite size, strain and dislocation density determined for PVP capped STO are 29 nm, 2.08 × 10−03 and 1.194 × 1015 m−2, respectively. FESEM images manifested a decrease in the grain size as a result of increase in the concentration of CTAB to 0.05 M and PVP to 0.005 M. Nearly spherical grains with some sort of fusing have been observed at lower and higher concentrations of the CTAB and PVP in both the cases.
Comment on “Application of the extended Lie group analysis to the Hopf functional formulation of the Burgers equation” [J. Math. Phys. 54, 072901 (2013)]
Authors: Frewer Michael , Khujadze George , Foysi Holger
Published: March 2016

The quest to find new statistical symmetries in the theory of turbulence is an ongoing research endeavor which is still in its beginning and exploratory stage. In our comment we show that the recently performed study of Wacławczyk and Oberlack [J. Math. Phys. 54, 072901 (2013)] failed to present such new statistical symmetries. Despite their existence within a functional Fourier space of the statistical Burgers equation, they all can be reduced to the classical and well-known symmetries of the underlying deterministic Burgers equation itself, except for one symmetry, but which, as we will demonstrate, is only a mathematical artefact without any physical meaning. Moreover, we show that the proposed connection between the translation invariance of the multi-point moments and a symmetry transformation associated to a certain invariant solution of the inviscid functional Burgers equation is invalid. In general, their study constructs and discusses new particular solutions of the functional Burgers equation without referring them to the well-established general solution. Finally, we also see a shortcoming in the presented methodology as being too restricted to construct a complete set of Lie point symmetries for functional equations. In particular, for the considered Burgers equation essential symmetries are not captured.