bluuebunny/crossref_metadata_2025 huggingface dataset:
Generalized Ramsey interferometry explored with a single nuclear spin qudit
Authors: Godfrin Clément , Ballou Rafik , Bonet Edgar , Ruben Mario , Klyatskaya Svetlana , Wernsdorfer Wolfgang , Balestro Franck
Published: October 2018

Qudits, with their state space of dimension d > 2, open fascinating experimental prospects. The quantum properties of their states provide new potentialities for quantum information, quantum contextuality, expressions of geometric phases, facets of quantum entanglement and many other foundational aspects of the quantum world that are unapproachable via qubits. Here, we have experimentally investigated the quantum dynamics of a qudit (d = 4) that consists of a single 3/2 nuclear spin embedded in a molecular magnet transistor geometry, coherently driven by a microwave electric field. In order to demonstrate the potentialities of molecular magnets for quantum technologies, we implemented three protocols based on a generalization of the Ramsey interferometry to a multilevel system. First, the Ramsey interference is used to measure the accumulation of geometric phases. Then, two distinct transitions of the nuclear spin are addressed to measure the phase of an iSWAP quantum gate. Finally, through a succession of two Hadamard gates, the coherence time of a 3-state superposition is measured.
Imaging of Pseudomonas aeruginosa infection with Ga-68 labelled pyoverdine for positron emission tomography
Authors: Petrik Milos , Umlaufova Eva , Raclavsky Vladislav , Palyzova Andrea , Havlicek Vladimir , Haas Hubertus , Novy Zbynek , Dolezal Dalibor , Hajduch Marian , Decristoforo Clemens
Published: October 2018

Pseudomonas aeruginosa is an increasingly prevalent opportunistic pathogen that causes a variety of life-threatening nosocomial infections. Novel strategies for the development of new antibacterial treatments as well as diagnostic tools are needed. One of the novel diagnostic strategies for the detection of infection could be the utilization of siderophores. Siderophores are low-molecular-weight chelators produced by microbes to scavenge essential iron. Replacing iron in siderophores by suitable radiometals, such as Ga-68 for positron emission tomography (PET) imaging, opens approaches for targeted imaging of infection. Here we report on pyoverdine PAO1 (PVD-PAO1), a siderophore produced by P. aeruginosa, labelled with Ga-68 for specific imaging of Pseudomonas infections. PVD-PAO1 was labelled with Ga-68 with high radiochemical purity. The resulting complex showed hydrophilic properties, low protein binding and high stability in human serum. In vitro uptake of 68Ga-PVD-PAO1 was highly dependent on the type of microbial culture. In normal mice 68Ga-PVD-PAO1 showed rapid pharmacokinetics with urinary excretion. PET imaging in infected animals displayed specific accumulation of 68Ga-PVD-PAO1 in infected tissues and better distribution than clinically used 18F-fluorodeoxyglucose (18F-FDG) and 68Ga-citrate. Ga-68 labelled pyoverdine PAO1 seems to be a promising agent for imaging of P. aeruginosa infections by means of PET.
Human Bronchial Epithelial Cells Inhibit Aspergillus fumigatus Germination of Extracellular Conidia via FleA Recognition
Authors: Richard Nicolas , Marti Léa , Varrot Annabelle , Guillot Loïc , Guitard Juliette , Hennequin Christophe , Imberty Anne , Corvol Harriet , Chignard Michel , Balloy Viviane
Published: October 2018

Aspergillus fumigatus is an environmental filamentous fungus that may act as an opportunistic pathogen causing a variety of diseases, including asthma or allergic bronchopulmonary aspergillosis, and infection, ranging from asymptomatic colonization to invasive pulmonary form, especially in immunocompromised patients. This fungus is characterized by different morphotypes including conidia which are the infective propagules able to germinate into hyphae. Due to their small size (2–3 µm), conidia released in the air can reach the lower respiratory tract. The objective of this study was to characterize the interactions between conidia and bronchial epithelial cells. To this end, we studied the role of bronchial epithelial cells, i.e., the BEAS-2B cell line and human primary cells, in conidial germination of a laboratory strain and three clinical strains of A. fumigatus. Microscopic observations and galactomannan measurements demonstrated that contact between epithelial cells and conidia leads to the inhibition of conidia germination. We demonstrated that this fungistatic process is not associated with the release of any soluble components nor internalization by the epithelial cells. We highlight that this antifungal process involves the phosphoinositide 3-kinase pathway on the host cellular side and the lectin FleA on the fungal side. Collectively, our results show that bronchial epithelial cells attenuate fungal virulence by inhibiting germination of extracellular conidia, thus preventing the morphological change from conidia to filaments, which is responsible for tissue invasion.
Effect of natural products on the production and activity of Clostridium difficile toxins in vitro
Authors: Roshan Niloufar , Riley Thomas V. , Knight Daniel R. , Hammer Katherine A.
Published: October 2018

Clostridium difficile infection is a toxin-mediated disease of the colon. C. difficile virulence is primarily attributed to the production of toxin A and toxin B; thus this study was aimed to investigate the effect of a range of natural products on the production and activity of C. difficile toxins in vitro. Twenty-two natural products were investigated against four C. difficile strains. The activity of products against toxins was determined using Vero and HT-29 cells cytotoxicity and neutral red uptake assays. The indirect effect of products on toxin-mediated cytotoxicity was determined using the same cell lines. The effect of seven products on toxin production by C. difficile was determined using ELISA. Zingerone (0.3 mg/ml) protected both cell lines from C. difficile cytopathic effects, confirmed by the neutral red uptake assay (P < 0.05). Three Leptospermum honeys (4% w/v), fresh onion bulb extract (12.5% v/v) and trans-cinnamaldehyde (0.005% v/v) all reduced toxin production and activity significantly (P ≤ 0.023). Garlic clove powder (4.7 mg/ml) only reduced toxin activity (P ≤ 0.047). Overall, several natural products had activity against C. difficile toxins in vitro encouraging further investigation against C. difficile toxins in vivo.
The yeast GRASP Grh1 displays a high polypeptide backbone mobility along with an amyloidogenic behavior
Authors: Fontana N. A. , Fonseca-Maldonado R. , Mendes L. F. S , Meleiro L. P. , Costa-Filho A. J.
Published: October 2018

GRASPs are proteins involved in cell processes that seem paradoxical: responsible for shaping the Golgi cisternae and involved in unconventional secretion mechanisms that bypass the Golgi. Despite its physiological relevance, there is still a considerable lack of studies on full-length GRASPs. Our group has previously reported an unexpected behavior of the full-length GRASP from the fungus C. neoformans: its intrinsically-disordered characteristic. Here, we generalize this finding by showing that it is also observed in the GRASP from S. cerevisae (Grh1), which strongly suggests it might be a general property within the GRASP family. Furthermore, Grh1 is also able to form amyloid-like fibrils either upon heating or when submitted to changes in the dielectric constant of its surroundings, a condition that is experienced by the protein when in close contact with membranes of cell compartments, such as the Golgi apparatus. Intrinsic disorder and fibril formation can thus be two structural properties exploited by GRASP during its functional cycle.
Assessing the suitability of copper thiocyanate as a hole-transport layer in inverted CsSnI3 perovskite photovoltaics
Authors: Wijesekara Anjana , Varagnolo Silvia , Dabera G. Dinesha M. R. , Marshall Kenneth P. , Pereira H. Jessica , Hatton Ross A.
Published: October 2018

We report the findings of a study into the suitability of copper (I) thiocyanate (CuSCN) as a hole-transport layer in inverted photovoltaic (PV) devices based on the black gamma phase (B-γ) of CsSnI3 perovskite. Remarkably, when B-γ-CsSnI3 perovskite is deposited from a dimethylformamide solution onto a 180–190 nm thick CuSCN film supported on an indium-tin oxide (ITO) electrode, the CuSCN layer is completely displaced leaving a perovskite layer with high uniformity and coverage of the underlying ITO electrode. This finding is confirmed by detailed analysis of the thickness and composition of the film that remains after perovskite deposition, together with photovoltaic device studies. The results of this study show that, whilst CuSCN has proved to be an excellent hole-extraction layer for high performance lead-perovskite and organic photovoltaics, it is unsuitable as a hole-transport layer in inverted B-γ-CsSnI3 perovskite photovoltaics processed from solution.
Improving Protein Gamma-Turn Prediction Using Inception Capsule Networks
Authors: Fang Chao , Shang Yi , Xu Dong
Published: October 2018

Protein gamma-turn prediction is useful in protein function studies and experimental design. Several methods for gamma-turn prediction have been developed, but the results were unsatisfactory with Matthew correlation coefficients (MCC) around 0.2–0.4. Hence, it is worthwhile exploring new methods for the prediction. A cutting-edge deep neural network, named Capsule Network (CapsuleNet), provides a new opportunity for gamma-turn prediction. Even when the number of input samples is relatively small, the capsules from CapsuleNet are effective to extract high-level features for classification tasks. Here, we propose a deep inception capsule network for gamma-turn prediction. Its performance on the gamma-turn benchmark GT320 achieved an MCC of 0.45, which significantly outperformed the previous best method with an MCC of 0.38. This is the first gamma-turn prediction method utilizing deep neural networks. Also, to our knowledge, it is the first published bioinformatics application utilizing capsule network, which will provide a useful example for the community. Executable and source code can be download at http://dslsrv8.cs.missouri.edu/~cf797/MUFoldGammaTurn/download.html.
Rapid degradation of progressive ankylosis protein (ANKH) in craniometaphyseal dysplasia
Authors: Kanaujiya Jitendra , Bastow Edward , Luxmi Raj , Hao Zhifang , Zattas Dimitrios , Hochstrasser Mark , Reichenberger Ernst J. , Chen I-Ping
Published: October 2018

Mutations in the progressive ankylosis protein (NP_473368, human ANKH) cause craniometaphyseal dysplasia (CMD), characterized by progressive thickening of craniofacial bones and widened metaphyses in long bones. The pathogenesis of CMD remains largely unknown, and treatment for CMD is limited to surgical intervention. We have reported that knock-in mice (AnkKI/KI) carrying a F377del mutation in ANK (NM_020332, mouse ANK) replicate many features of CMD. Interestingly, ablation of the Ank gene in AnkKO/KO mice also leads to several CMD-like phenotypes. Mutations causing CMD led to decreased steady-state levels of ANK/ANKH protein due to rapid degradation. While wild type (wt) ANK was mostly associated with plasma membranes, endoplasmic reticulum (ER), Golgi apparatus and lysosomes, CMD-linked mutant ANK was aberrantly localized in cytoplasm. Inhibitors of proteasomal degradation significantly restored levels of overexpressed mutant ANK, whereas endogenous CMD-mutant ANK/ANKH levels were more strongly increased by inhibitors of lysosomal degradation. However, these inhibitors do not correct the mislocalization of mutant ANK. Co-expressing wt and CMD-mutant ANK in cells showed that CMD-mutant ANK does not negatively affect wt ANK expression and localization, and vice versa. In conclusion, our finding that CMD mutant ANK/ANKH protein is short-lived and mislocalized in cells may be part of the CMD pathogenesis.
Whole-genome sequencing of esophageal adenocarcinoma in Chinese patients reveals distinct mutational signatures and genomic alterations
Authors: Dai James Y. , Wang Xiaoyu , Buas Matthew F. , Zhang Chengjuan , Ma Jie , Wei Bing , Li Yin , Zhao Baosheng , Hyun Teresa S. , Chen Xueyan , Loeb Keith R. , Odze Robert , Yao Lena , Sun Xin , Self Steve , Vaughan Thomas L. , Guo Yongjun
Published: October 2018

While the incidence of esophageal adenocarcinoma (EAC) has risen drastically in Western countries over the last 40 years, a similar trend has not been observed for EAC in China. Here, we analyzed mutational spectrum, copy number alterations, and structural variants from whole-genome sequencing of 10 Chinese EAC tumor samples and their matched normal samples, and compared them to previously reported EAC tumor specimens from Western countries. The mutational burden in Chinese EAC was significantly lower than that found in EAC from Western countries. The hallmark A>C mutational signature observed at high frequency in EAC from Western countries, which has been linked to acid reflux, is completely absent in Chinese samples. Furthermore, none of the Chinese samples showed evidence of chromothripsis and genome doubling that are often found in EAC from Western countries. In summary, Chinese EAC tumor samples had distinct genomic profiles and signatures, suggesting that EAC in Chinese individuals may arise from a different etiological pathway.
Repeat bleaching of a central Pacific coral reef over the past six decades (1960–2016)
Authors: Barkley Hannah C. , Cohen Anne L. , Mollica Nathaniel R. , Brainard Russell E. , Rivera Hanny E. , DeCarlo Thomas M. , Lohmann George P. , Drenkard Elizabeth J. , Alpert Alice E. , Young Charles W. , Vargas-Ángel Bernardo , Lino Kevin C. , Oliver Thomas A. , Pietro Kathryn R. , Luu Victoria H.
Published: October 2018

The oceans are warming and coral reefs are bleaching with increased frequency and severity, fueling concerns for their survival through this century. Yet in the central equatorial Pacific, some of the world’s most productive reefs regularly experience extreme heat associated with El Niño. Here we use skeletal signatures preserved in long-lived corals on Jarvis Island to evaluate the coral community response to multiple successive heatwaves since 1960. By tracking skeletal stress band formation through the 2015-16 El Nino, which killed 95% of Jarvis corals, we validate their utility as proxies of bleaching severity and show that 2015-16 was not the first catastrophic bleaching event on Jarvis. Since 1960, eight severe (>30% bleaching) and two moderate (<30% bleaching) events occurred, each coinciding with El Niño. While the frequency and severity of bleaching on Jarvis did not increase over this time period, 2015–16 was unprecedented in magnitude. The trajectory of recovery of this historically resilient ecosystem will provide critical insights into the potential for coral reef resilience in a warming world.
Subdiffusion of loci and cytoplasmic particles are different in compressed Escherichia coli cells
Authors: Yu Shi , Sheats Julian , Cicuta Pietro , Sclavi Bianca , Cosentino Lagomarsino Marco , Dorfman Kevin D.
Published: October 2018

The complex physical nature of the bacterial intracellular environment remains largely unknown, and has relevance for key biochemical and biological processes of the cell. Although recent work has addressed the role of non-equilibrium sources of activity and crowding, the consequences of mechanical perturbations are relatively less explored. Here we use a microfabricated valve system to track both fluorescently labeled chromosomal loci and cytoplasmic particles in Escherichia coli cells shortly after applying a compressive force, observing the response on time scales that are too sudden to allow for biochemical response from the cell. Cytoplasmic diffusion slows markedly on compression but the exponent governing the growth of the ensemble-averaged mean-squared displacement of cytoplasmic particles is unaffected. In contrast, the corresponding exponent for DNA loci changes significantly. These results suggest that DNA elasticity and nucleoid organization play a more important role in loci subdiffusion than cytoplasmic viscoelasticity under such short time scales.
A comparative study of branched and linear mannitol-based amphiphiles on membrane protein stability
Authors: Hussain Hazrat , Helton Tyler , Du Yang , Mortensen Jonas S. , Hariharan Parameswaran , Ehsan Muhammad , Byrne Bernadette , Loland Claus J. , Kobilka Brian K. , Guan Lan , Chae Pil Seok
Published: October 2018

The comparative study on linearvs. branched alkyl-chain amphiphiles indicates a favorable role for branched alkyl-chains in stabilizing membrane proteins.
Development of a method for multiple vitamin D metabolite measurements by liquid chromatography coupled with tandem mass spectrometry in dried blood spots
Authors: Rola R. , Kowalski K. , Bieńkowski T. , Kołodyńska-Goworek A. , Studzińska S.
Published: October 2018

Profiling of vitamin D metabolites in dried blood spots, including 24,25(OH)2D3, has been performed for the first time.
Early transition metal-catalyzed C–H alkylation: hydroaminoalkylation for Csp3–Csp3 bond formation in the synthesis of selectively substituted amines
Authors: Edwards P. M. , Schafer L. L.
Published: October 2018

Protecting group, directing group, and external oxidant free synthesis of structurally diverse amines.
Self-assembled adhesive biomaterials formed by a genetically designed fusion protein
Authors: Aich Pulakesh , An Jaeyeon , Yang Byeongseon , Ko Young Ho , Kim Junghyun , Murray James , Cha Hyung Joon , Roh Joon Ho , Park Kyeng Min , Kim Kimoon
Published: October 2018

A spider with mussel: a supramolecular fiber formed by a spider dragline protein was tuned to have underwater adhesion property by genetic fusion of a mussel foot protein.
NaHS·nH2O-induced umpolung: the synthesis of 2-acyl-3-aminoindoles from aryl methyl ketones and 2-aminobenzonitriles
Authors: Geng Xiao , Wu Xia , Wang Can , Zhao Peng , Zhou You , Sun Xuan , Wang Ling-Jiao , Guan Wen-Juan , Wu Yan-Dong , Wu An-Xin
Published: October 2018

An efficient method for constructing 2-acyl-3-aminoindoles from methyl ketones and 2-aminobenzonitriles is described, in which NaHS·nH2O is used as a novel umpolung reagent for the first time in organic synthesis.
Moderate supercritical synthesis as a facile route to mixed-valent uranium(iv,v) and (v,vi) silicates
Authors: Pace Kristen A. , Klepov Vladislav V. , Morrison Gregory , zur Loye Hans-Conrad
Published: October 2018

The synthesis of five new U(iv,v) and U(v,vi) silicates points toward moderate supercritical synthesis as a new route to the stabilization of mixed-valent uranium compounds.
Fast screening of porous materials for noble gas adsorption and separation: a classical density functional approach
Authors: Guo Fangyuan , Liu Yu , Hu Jun , Liu Honglai , Hu Ying
Published: October 2018

Fast CDFT screening of porous materials for noble gas adsorption/separation.
Hybrid functional calculations of electronic and thermoelectric properties of GaS, GaSe, and GaTe monolayers
Authors: Bahuguna Bhagwati Prasad , Saini L. K. , Sharma Rajesh O. , Tiwari Brajesh
Published: October 2018

We have investigated the structural, electronic and thermoelectric properties of GaS, GaSe and GaTe monolayers based on the first-principles approach by using density functional theory and the semi-classical Boltzmann transport equation.
Vibrational properties and Raman spectra of pristine and fluorinated blue phosphorene
Authors: Deng Zexiang , Li Zhibing , Wang Weiliang , She Juncong
Published: October 2018

Using density functional theory, we investigated the vibrational properties and Raman spectra of pristine blue phosphorene and fluorinated blue phosphorene. We have calculated the Raman tensor and thus the angle-dependent Raman intensity for the Raman active modes A1g and Eg with laser line (633 nm and 532 nm).
Controlled iso-specific polymerization of 2-vinylpyridine catalyzed by arylamide-ligated rare-earth metal aminobenzyl complexes
Authors: Li Min , Wang Chaopan , Chen Jue , Guo Zhiyong , Mou Zehuai , Luo Yunjie
Published: October 2018

Arylamide rare-earth metal aminobenzyl complexes were employed as highly active catalysts for iso-specific polymerization of 2-vinylpyridine.
Low thermal conductivity and high figure of merit for rapidly synthesized n-type Pb1−xBixTe alloys
Authors: Chen Tingting , Wang Hongchao , Su Wenbin , Mehmood Fahad , Wang Teng , Zhai Jinze , Wang Xue , Wang Chunlei
Published: October 2018

High zTs of Pb1−xBixTe alloys rapidly synthesized at low temperature in this study are comparable to those from conventional melting synthesis.
Morphological and chemical evidence for cyclic bone growth in a fossil hyaena
Authors: Anné Jennifer , Wogelius Roy A. , Edwards Nicholas P. , van Veelen Arjen , Buckley Michael , Sellers William I. , Bergmann Uwe , Sokaras Dimosthenis , Alonso-Mori Roberto , Harvey Virginia L. , Egerton Victoria M. , Manning Phillip L.
Published: October 2018

Our study is the first to correlate differential distributions of trace elements within the different tissue types of zonal bone.
Green synthesis of porous Au–Nx-TiO2 nanospheres for solar light induced photocatalytic degradation of diazo and triazo dyes and their eco-toxic effects
Authors: Pugazhenthiran N. , Mangalaraja R. V. , Sathishkumar P. , Murugesan S. , Muneeswaran T. , Pandiyarajan T. , Naveenraj S. , Contreras D. , Anandan S.
Published: October 2018

The photocatalytic activity of Au–Nx-TiO2 nanospheres evaluated under natural sunlight; 91% mineralization of azo dyes is achieved without toxic intermediates.
Rhodium-catalyzed triazole-directed C–H bond functionalization of arenes with diazo compounds
Authors: Wang Huanhong , Yi Xiaofei , Cui Yanli , Chen Wanzhi
Published: October 2018

Rhodium(iii)-catalyzed alkylation reactions of arenes through triazole directed C–H activation that lead to a number of dialkylated and monoalkylated triazoles are described.
Visible light catalyzed synthesis of quinolines from (aza)-Morita–Baylis–Hillman adducts
Authors: Chaturvedi Atul Kumar , Rastogi Namrata
Published: October 2018

A mild and efficient protocol for the synthesis of quinoline scaffolds from (aza)-MBH adducts under visible light catalysis has been established.
Correction: An elusive thermal [2 + 2] cycloaddition driven by visible light photocatalysis: tapping into strain to access C2-symmetric tricyclic rings
Authors: Singh Kamaljeet , Trinh Winston , Latifi Reza , Weaver Jimmie D.
Published: October 2018

Correction for ‘An elusive thermal [2 + 2] cycloaddition driven by visible light photocatalysis: tapping into strain to access C2-symmetric tricyclic rings’ by Kamaljeet Singh et al., Org. Biomol. Chem., 2018, DOI: 10.1039/c8ob01273c.
New nano-Fe3O4-supported Lewis acidic ionic liquid as a highly effective and recyclable catalyst for the preparation of benzoxanthenes and pyrroles under solvent-free sonication
Authors: Nguyen Hai Truong , Thi Le Ngoc-Phuong , Nguyen Chau Duy-Khiem , Tran Phuong Hoang
Published: October 2018

A novel magnetically separable catalyst can be used as a green solid Lewis acid catalyst in the synthesis of benzoxanthenes and pyrroles under solvent-free sonication.
An ultrahighly sensitive and repeatable flexible pressure sensor based on PVDF/PU/MWCNT hierarchical framework-structured aerogels for monitoring human activities
Authors: Wang Feng-xia , Zhang Shao-hui , Wang Lu-jia , Zhang Yun-lin , Lin Jian , Zhang Xiao-hua , Chen Tao , Lai Yue-kun , Pan Ge-bo , Sun Li-ning
Published: October 2018

Hierarchical framework-structured PVDF/PU/MWCNT (PPM) aerogels are proposed as an ultrasensitive sensing platform.
Effect of aligned and misaligned ventilation opening affecting energy demand and air quality in buildings
Authors: Morsli Souad , Ramenah Harry , El Ganaoui Mohammed , Bennacer Rachid
Published: October 2018

This work focuses on a horizontally ventilated cavity filled with air, heated on one side wall and cooled on the floor surface. Therefore, this study has been carried out for a convective loop induced for a fixed Rayleigh number Ra = 106 and horizontal ventilation (moderate Reynolds number Re = 100) where the injection is either in cooperating or opposing to the convective loop. The study undertaken concerns different opening position in order to analyze the energy efficiency of such ventilation and the corresponding indoor air quality. The results obtained indicate that the natural convection and the forced flow (ventilation) play an important role in the flow structure and the mixing ability, the heat exchange (cooling need) and the temperature comfort. The optimum ventilating position is a compromise in order to minimize the cooling demand, keep the mixing ability and reduce the temperature heterogeneity.
High order iterative methods for matrix inversion and regularized solution of fredholm integral equation of first kind with noisy data
Authors: Buranay Suzan Cival , Iyikal Ovgu Cidar
Published: October 2018

The motivation of the present work is to propose high order iterative methods with a recurrence formula for approximate matrix inversion and provide regularized solution of Fredholm integral equation of first kind with noisy data by an algorithm using the proposed methods. From the given family of methods of orders p = 7,11,15,19 are applied to solve problems of Fredholm integral equation of first kind. From the literature, iterative methods of same orders are used to solve the considered problems and numerical comparisons are shown through tables and figures.
Comparison of Encryption Algorithms in Wireless Sensor Networks
Authors: Dener Murat
Published: October 2018

In general, Wireless Sensor Networks occur when sensor nodes are randomly left in an unreliable environment. Sensor node has limited processor, limited memory, limited radio capacity and low cost. In sensor network applications, security mechanisms must be used, because of unsafe environments, excessive number of sensor nodes, and wireless communication environments. Ensuring confidentiality, the primary goal of security, is one of the most important problems to be solved in order to realize time and vital objectives. While ensuring security, it is also necessary to consider other important criteria such as memory usage, energy and latency of Sensor Networks. In this study, encryption is described in Wireless Sensor Networks and Skipjack, XXTEA and AES encryption algorithms are compared using TOSSIM simulation program in TinyOS operating system considering memory usage, energy and delay criteria. The study is considered to be useful academicians who study security in Wireless Sensor Networks.
A Soft Approach to Ring-Groupoids
Authors: Oǧuz Gülay , Gürsoy M.Habil , Içen Ilhan
Published: October 2018

This study introduces a soft approach to the concept of ring-groupoid which is the one of the structured groupoids. Some properties and characterizations of soft ring-groupoids are established. Also, the category of soft ringgroupoids constructed by the homomorphism between two soft ring-groupoids is presented.
Option of the Optical-mechanical Positioning of the Sensor and Sample in the Magnetometer. Determination of Magnetic Susceptibility of Powders and particles
Authors: Sandulyak Alexander , Sandulyak Anna , Kiselev Dmitriy , Polismakova Maria , Bulut Hasan
Published: October 2018

In Faraday's magnetometer it is recommended to apply remotely the located poles hemispheres. In this case (and similar cases) there is a need for expeditious and exact positioning of the measuring sensor (Hall) and the studied sample – for obtaining the most authentic characteristics of induction and its gradient, identification and use of a zone of stability. This problem is solved by the corresponding opticalmechanical system of positioning. It consists of the laser modules promoting aim positioning, the Web camera promoting final positioning. On the received concentration dependences of magnetic susceptibility of powder samples existence of limited line sections is confirmed that gives the chance to define susceptibility of particles. The critical relation to use for the similar purposes of samples (disperse) in the form of colloids and suspensions expresses.
On the wave solutions to the TRLW equation
Authors: Sulaiman Tukur Abdulkadir , Unlu Canan , Bulut Hasan
Published: October 2018

In this study, a nonlinear model is investigated, namely; the time regularized long wave equation. Various solitary wave solutions are constructed such as the non-topological, compound topological-non-topological bell-type, singular and compound singular soliton solutions. Under the choice of suitable parameters values, the 2D and 3D graphs to all the obtained solutions are plotted. The reported results in this study may be helpful in explaining the physical meanings of some important nonlinear models arising in the field of nonlinear science.
STUDY OF THREE DIMENSIONAL LAMINAR FORCED CONVECTION OF NANO FLUID FLOW THROUGH ECCENTRIC RECTANGULAR ANNULAR DUCT
Authors: Eltorky Amr G. , Elhelw Mohamed , Fayed Mohamed , Attia Abdelhamid
Published: October 2018

Heat transfer through the horizontal eccentric annulus between eccentric rectangular ducts with different eccentricities has been calculated with various aspect ratio of inner duct. Boundary conditions are used with constant hot temperature on inner duct and constant cold temperature on the outer duct. Space between two ducts included TiO2-water Nano-fluid with different solid Volume fraction (φ = 0, 2, 5, 10 %). The eccentricity was changed with different values (E = 0.025, 0.05, 0.075 m) in left direction and aspect ratio was changed with different value (AR= 0.25, 0.375, 0.5). Results show that with an increase of aspect ratios, the average Nusselt number increases. Alsowith an increase in eccentricity value,the average Nusselt numberremains constant, and then an increase begins to occur. And the average Nusselt number increase due to an increase in nanoparticle concentration.
Some Spectral Properties of p-Laplacian Diffusion Boundary Value Problem on Time Scales
Authors: Gulsen Tuba , Yilmaz Emrah , Kayalı Meltem
Published: October 2018

In this paper, we considerp-Laplacian type Diffusion boundary value problem on an arbitrary time scale. We generalize some spectral properties ofp-Laplacian Diffusion problem to an arbitrary time scale. Moreover, we prove Picone's identity for this problem.
Approximate Solutions of Two-Dimensional Burgers' and Coupled Burgers' Equations by Residual Power Series Method
Authors: Gulsen Selahattin , Inc Mustafa , Nabi Harivan R.
Published: October 2018

In this study, two-dimensional Burgers' and coupled Burgers' equations are examined by the residual power series method. This method provides series solutions which are rapidly convergent and their components are easily calculable by Mathematica. When the solution is polynomial, the method gives the exact solution using Taylor series expansion. The results display that the method is more efficient, applicable and accuracy and the graphical consequences clearly present the reliability of the method.
Extensions of Hadamard Codes Defined on Rings
Authors: Özkan Mustafa , Öke Figen
Published: October 2018

In this study, some special matrices are constructed by choosing certain elements from finite rings and certain codes are written by using these matrices.

These codes are extended to a field. Moreover these codes are classified and more good codes are written.
On Gray Images of Constacyclic Codes
Authors: Özkan Mustafa , Öke Figen
Published: October 2018

This paper deals with constacyclic codes over a new ring. Gray images of these codes over those rings are obtained. The relations between these codes and their Gray images are given.
On The Solutions of Some Difference Equations Systems and Analytical Properties
Authors: Tuz Münevver
Published: October 2018

In this study, we investigated the global asymptotic behaviors of their solutions by taking the second-order difference equation system. According to the given conditions, we obtained some asymptotic results for the positive balance of the system. We have also worked on q-fast changing functions. Such functions form the class of q-Caramate functions. We have applied q-Caramate functions to linear q-difference equations and We have also learned about the asymptotic behavior of solutions. In addition, we have studied the problem of initial and boundary value for the q-difference equation
Optical Solitons and Other Solutions to the (2+1)-Dimensional Cubic Nonlinear Schrödinger Equation with Fractional Temporal Evolution
Authors: Atas Sibel Sehriban , Sulaiman Tukur Abdulkadir , Bulut Hasan
Published: October 2018

In this study, the (2+1)-dimensional cubic nonlinear Schrödinger equation with fractional temporal evolution is investigated by using the extended sinh-Gordon equation expansion method. The idea of conformable fractional derivative is used in transforming the complex nonlinear partial differential equation to nonlinear ordinary differential equation. Dark, bright, mixed dark-bright, singular, mixed singular solitons and singular periodic wave solutions are successfully reached. The parametric conditions for the existence of valid solitons are given. The 2D and 3D graphics to some of the reported solutions are plotted.
Investigation of Dark and Bright Soliton Solutions of Some Nonlinear Evolution Equations
Authors: Demiray Seyma Tuluce , Bulut Hasan
Published: October 2018

In this paper, generalized Kudryashov method (GKM) is used to find the exact solutions of (1+1) dimensional nonlinear Ostrovsky equation and (4+1) dimensional Fokas equation. Firstly, we get dark and bright soliton solutions of these equations using GKM. Then, we remark the results we found using this method.
Dynamic Reliability Evaluation of Linear Consecutive k-out-of-n0: F System With Multi-State Components
Authors: GÖKDERE Gökhan , GÜRCAN Mehmet
Published: October 2018

In engineering applications, analyzing a technical system vary according to the operating principles of the system. In some situations, the status of the system is a function of stresses which act on the system and cause degradation. In order to efficiently analysis the reliability of a system which operates under stress, assigning the various states to the components depending on their operating performance is very important. In this paper, we have investigated the linear consecutive k-out-of-n: F system and assigned multiple states to its components. Due to the reason, the operating performance of the components can easily be controlled. Apart from that the reliability of the system depending on the states of its components can be calculated at any time interval. In the numerical example, the states of the components and the reliability calculation of the system at specific time intervals are shown clearly.
On rough convergence variables of triple sequences
Authors: Ozdemir M. Kemal , Esi Ayhan , Esi Ayten
Published: October 2018

Triple sequence convergence has an extremly important position in the basic theory of mathematics. The present manuscript contains four types of convergence concept of convergence almost surely, convergence incredibility, trust convergence in mean and convergence in distribution and discuss the relation ship among those and some mathematical properties of those new convergence.
Increasing the operational stability of running surfaces of aluminothermiс welded rail joints by hot grinding
Authors: Galay Marina , Sidorov Eduard
Published: October 2018

Welded joints have traditionally been a weak point in a design of continuous welded rail (CWR) tracks. Grinding can be used as a resource-saving technology. The purpose of this paper is to study the grinding technology for welded rail joints at different temperatures. The temperature in the weld grinding zone varied from 560 to 850 °С. Using methods of microstructural analysis and hardness measurement, it has been established that different temperature conditions for weld grinding lead to the creation of non-identical mechanical properties of metal and a surface structure of the rail head in the weld zone. As a result of the research, an optimum temperature range, 600 ... 560 °C, was determined. This range is recommended for grinding aluminothermic welded joints.
Asphalt concrete pavement reinforced with chemical fibers
Authors: Lukashevich Viktor , Efanov Igor , Vlasov Viktor , Lukashevich Olga
Published: October 2018

Asphalt concrete pavement which is currently built in accordance with the existing requirements does not withstand the standard service life. Various kinds of damages occur. Fiber reinforcement of asphalt concretes is one of the effective means to deal with deformations and fractures of road pavements, such as rutting, buckling, crack formation and shear. Chemical fibers serving as reinforcement are of great concern herein. The major purpose of this work was evaluation of reinforcement fibers resistance to natural environment and climatic impacts within the conditions of experimental production construction and studying compactibility of asphalt concrete mixture with fiber reinforcement. Infrared spectroscopy and physical-chemical investigations of fibers were used to study changing properties of fiber-forming polymer. Compactibility of asphalt concrete mixture with fiber reinforcement was determined upon compaction factor. Research results revealed insignificant influence of natural environment and climatic impacts on the properties of fiber reinforcement material. In order to obtain the standard compaction factor of asphalt concrete additional compacting impact is not required.
Road surface quality as the basis of safe operation of transport systems
Authors: Grekhov Pavel , Levashov Sergey , Shkrabak Vladimir , Shkrabak Roman
Published: October 2018

The safe functioning of the transport system mainly depends on the quality of road surfaces. Therefore, improvement of the physical and mechanical characteristics of roads will ensure the effective protection of health and safety of people engaged in this field. Consequently, modification of the physical and mechanical characteristics of road surfaces will ensure safety in the field of transport systems. Bitumen-salt mass was used as a modifier of the road bitumen emulsions and such a mass was obtained by means of destructing the chemical weapons of the organophosphorus class of compounds since they have an effect of surface-active substances. Studying of the modified road surface parameters was carried out according to the dispersion parameters and using the method of mathematical design of the experiment. As a result, the positive effect of the bitumen-salt mass on the dispersion distribution of the bitumen phase in the bitumen emulsion was determined. The proposed method of modification of the bitumen emulsions allowed us to improve the operational parameters of the road surfaces, and thus the safety of road transport systems as a whole.
Energy-efficient power regulators for electric railway vehicles
Authors: Astrakhantsev Leonid , Ryabchyonok Natalya , Alekseeva Tatyana , Khomenko Andrey , Martusov Aleksey
Published: October 2018

This study aims at validation of the power regulation parameter for electric railway vehicles for effective use of electrical potential of energy sources. Based on analysis of electromagnetic processes with the use of suggested energy parameters and mathematical modeling method the assessment of energy efficiency was performed for semiconductor power regulators for alternating and direct current electric traction drives. Power balance and obtained mathematical equations for calculation of its components allow improving the education content of educational institutions due to eliminating methodological inconsistencies. The suggested technical solutions for continuous and full use of the electrical potential of overhead systems and self-generated power supply sources ensure their advantage in terms of structure, energy efficiency and electromagnetic compatibility.
Financial aspects of transport infrastructure development in regions
Authors: Bubnov Vyacheslav , Bubnova Yulia
Published: October 2018

The level of economic development depends on many factors, among which infrastructure, including railway transport, is the key one. Financing of infrastructure-related projects on the regional level encourages economic growth. However, different level of overall development of subject of the Russian Federation causes inequality in the level of transport infrastructure development and makes common approach to its financing inapplicable. The necessity appears to build a model of financing for transport-related infrastructure with the use of statistical data and mathematical approach with the account of regional market peculiarities. Due to selection of indicators affecting economic growth and building parametric factor model, classification of financing on subfederal level was carried out, which makes it applicable for states with federal structure.
Application of probability and statistics methods in arrangement of railway transportation
Authors: Gefan Grigory
Published: October 2018

Complex economic and mathematical methods are becoming more widespread in training of specialists in the field of railroad communication arrangement. The purpose of this study is to develop an effective methodology for mathematical training of railway transportation specialists on the basis of active training methods. The article deals with application of probabilistic and statistical methods to problems in design of railway transportation, for example, fluctuations in loading of railway stations and distribution of the time interval between arrival of trains. Using the example of the flow of arriving trains, the technology of testing the hypothesis that the time between arrival of trains is distributed according to the exponential law and the hypothesis of independence of events in the flow is displayed in detail. When confirming each of these hypotheses, it must be concluded that the flow of trains arriving at the station is according to the simplest (Poisson’s) model. This conclusion allows using the apparatus of Markov chains to describe a random process.
Cost management in track facilities of railway transport infrastructure
Authors: Solskaya Irina , Belomestnykh Sergei
Published: October 2018

The purpose of the study is definition and substantiation of the main development points of assessment and planning functions in the cost management system of railway transport infrastructure. Methods used in the study include general scientific analysis and synthesis, dynamic and structural analysis of economic indicators, as well as textual analysis of regulatory documents. Such approach enables to formulate industry-specific peculiarities of cost assessment based on general theoretical concepts of effective use of factors of production. The result of this study is an author's developed approach to cost management system for railway transport infrastructure.
Modeling of traction power supply systems for movement of high-speed trains
Authors: Cherepanov Aleksandr , Zakaryukin Vasily , Kryukov Andrey
Published: October 2018

Upgrading of traction power supply systems will be required to transfer electrified railway lines to high-speed traffic. Coaxial cables and balancing transformers can be used as technical upgrading means. The article presents the results of computer simulation in the Fazonord software complex of the traditional 2x25 kV traction system, as well as systems with coaxial cables and Woodbridge symmetric transformers. Simulation results showed that the use of cables contributes to a significant increase in the level of voltage on current collectors of electric rolling stock. Use of modified Woodbridge transformers makes it possible to reduce the imbalance coefficient by the reverse sequence on high voltage buses of traction substations. However, the reduction is insignificant and depends on the modes of movement of trains in adjacent inter-station zones. The biggest positive effects occur in the integrated application of balancing transformers and coaxial cables.
Estimation of conditions of using combined single-track and double-track railways at high-speed traffic
Authors: Dmitrenko Alexei , Karasev Sergei , Kalidova Alexandra , Sivitsky Dmitry
Published: October 2018

An important condition when arranging high-speed railway transportation with insignificant traffic is saving of capital investments in construction of new lines or the reconstruction the existing ones. Development of methods for multi-criteria estimation of the possibility of using fully single-track blocks on a line with high-speed traffic, as well as single-track blocks with double-track inserts, is a relevant issue. The purpose of the study is to develop the criteria and the method for estimation of the feasibility of using single-track elements on a line with high-speed traffic. Methods of simulation modeling, mathematical statistics, regression analysis were used. A method that includes estimation of the technological conditions of using single-track elements on a line with high-speed traffic instead of double-track blocks was developed. The method can be used for multi-criteria optimization of the configuration of a combined single-track and a double-track line using single-track elements in high-cost areas.
Assessment criteria for decisions in the field of rail freight transportation
Authors: Tanaino Iuliia , Yugrina Olga , Zharikova Larisa
Published: October 2018

Timely relocation of empty cars to loading stations plays an important role in rail freight transport logistics. The purpose of the study is to determine the criteria for identifying a need for reserved station tracks while minimizing operating costs. The authors used special methods to study freight transport operations and mathematically modeled the transportation process subject to the developed technological measures, such as concentrating the car traffic at stations and yards with sufficient technical capabilities, minimizing the number of handling operations in transit, and differentiating cars according to their respective operators. As a result, the authors identified the criteria underlying the decision-making algorithm for managing rail transport operations, while minimizing costs throughout the service area.
Model of passenger rolling stock maintenance
Authors: Bannikov Dmitry , Sirina Nina
Published: October 2018

In order to improve the quality of maintenance and repair of a passenger rolling stock, Russian Railways JSC requires transition to routine maintenance. The paper studies the main stages of building a discrete-event model of a passenger rolling stock maintenance using AnyLogic environment. The following key parameters of maintenance are used: maintenance facilities location, rolling stock operability index, probability index for operational efficiency (downtime and failure probability), maintenance and repair costs. The maintenance model is implemented in the integrated modeling library. Simulation model enables to implement the modeled system and obtain performance indicators of routine maintenance system operation. By simulating various conditions it is possible to evaluate efficiency of the studied maintenance system for a high-speed passenger rolling stock.
Integrated development of carrying capacities of the Baikal-Amur Mainline and Trans-Siberian Railway
Authors: Borodin Andrey , Kozlov Petr , Kalinichenko Anatoly
Published: October 2018

The paper considers actual technical and technological problems in the development of the Eastern polygon of the Russian railway network. The purpose of the study is to develop a methodology and software tools that ensure the search for effective solutions for given resource and logistical constraints. Methods of simulation modeling, distribution of flows on networks and graphs are used. The result of the study is a hybrid set of model calculations.