bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of a Communication Scheme in a Modern Factory in Accordance with the Standard of Industry 4.0
Authors: Halenár Igor , Juhásová Bohuslava , Juhás Martin 
Published: April 2017

AbstractThis article first describes the current state of the problem in the area of communication in modern factories. Next in the article is given a summary of the requirements that must be implemented for the possibility of establishing a compatible and safe communication system. In the final part of the article is given a proposal of communication model suitable for the implementation.
Influence of Cutting Environment on Tool Life
Authors: Buranská Eva , Gerulová Kristína , Buranský Ivan 
Published: April 2017

Abstract
The issues of cutting environment and a suitable choice of cutting conditions by drilling are the main subjects of the article. Attention is paid to the application of the drilling process into the carbon steel. Analysed were the phenomena that adversely affect the tool life. The article demonstrated solutions how to remove these adverse effects. The multicriteria optimisation of input factors (cutting fluid concentration, cutting speed) for a defined target function (tool life) was applied. The measured values were subjected to mathematical–statistical analysis (ANOVA). Based on the implemented experiment and study of this issue, we determined the combinations of input factors, which achieved minimal values of target functions. Based on the implemented experiment and study of this issue, we also determined the combinations of input factors, which achieved minimal values of target functions. Based on this allegation, the most appropriate combination of the following input factors was proved: concentration 6.3 % and cutting speed 100 m/min.
Impact of Machined Workpiece Position in Workspace on Precision of Manufacturing Using an Angular Robot
Authors: Kusá Martina , Bárta Jozef 
Published: April 2017

Abstract
Use of an industrial robot in the production process as a spindle carrier is currently an interesting topic. However, if the stiffness of the robot is not sufficient, various imprecisions may occur during machining. The article deals with monitoring and evaluating the impact of cutting conditions and positions of the workpiece in the working area on the machined surfaces oriented in orthogonal planes. The aim of the experiment was to analyse the precision of simple planar surfaces milled using a robot.
ERP System in Virtualized Production Environment
Authors: Spoială D. C. , Silaghi H. M. , Spoială V. , Cacuci A. 
Published: April 2017

Abstract
This paper presents one implementation of a ERP system using small computer systems interface (iSCSI) Network attached storage (NAS), and VMware technology, used in a company production environment. As a case ERP system is SAP.
Analysis and Visualization of Natural Threats Against the Security of Electricity Transmission System
Authors: Huang T. , Pi R. , Bompard E. , Profumo F. , Cuccia P. , Fulli G. , Masera M. 
Published: April 2017

Abstract
Electricity is one of the crucial energies of modern society, but it is greatly threatened by various kinds of menaces, especially natural hazards. Although they rarely happen, their occurrence may hugely affect the operation of power system. In this paper, we firstly, according the impact on power systems, classify natural threats into two categories (natural disasters and extreme weather conditions) and several subcategories (geological, hydrological, meteorological and climatological). Then the changes in natural threats to power systems and their trends during recent decades are discussed, along with a review of events that pose natural threats to the power system. Finally, the georeferenced model based on the Italy transmission system for natural threats analysis is presented.
Effects of Resistance Training on Cardiovascular Function in Patients With Peripheral Artery Disease: A Randomized Controlled Trial
Authors: Gomes Ana P.F. , Correia Marilia A. , Soares Antônio H.G. , Cucato Gabriel G. , Lima Aluísio H.R.A. , Cavalcante Bruno R. , Sobral-Filho Dário C. , Ritti-Dias Raphael M. 
Published: April 2017

Abstract
Gomes, APF, Correia, MA, Soares, AHG, Cucato, GG, Lima, AHRA, Cavalcante, BR, Sobral-Filho, DC, and Ritti-Dias, RM. Effects of resistance training on cardiovascular function in patients with peripheral artery disease: A randomized controlled trial. J Strength Cond Res 32(4): 1072–1080, 2018—The aim of this study was to analyze the effects of resistance training on cardiovascular function of patients with peripheral artery disease (PAD). In total, 30 patients with PAD were invited to participate in this randomized controlled trial, randomly allocated to a control (n = 15, 66 ± 2 years; stretching and relaxation exercises) or resistance training group (n = 15, 60 ± 3 years; 3 sets of 10 repetitions of 8 whole-body exercises, with a 2-minute interval between sets). Resting and 24-hour blood pressure (BP), cardiac output, systemic vascular resistance, and autonomic variables were obtained before and after 12 weeks of intervention. A blinded investigator performed all analyses. After 12 weeks of intervention there was maintenance of resting systolic, diastolic, and mean BP (p > 0.18), cardiac output (p = 0.46), and systemic vascular resistance (p = 0.55) in both groups. There was a time effect reduction in heart rate (p = 0.02), accompanied by changes in cardiac autonomic modulation (p = 0.03). There were no changes in 24-hour systolic, diastolic, and mean BP, heart rate, or rate pressure product (p > 0.05). The BP variability decreased in systolic (asleep, p = 0.003), diastolic (24 hours and awake, p = 0.001), and mean (24 hours and asleep, p < 0.02) only in the resistance training (RT) group. Twelve weeks of RT did not change resting and 24-hour BP, or their hemodynamic and autonomic determinants in patients with PAD; however, there were decreases in BP variability, indicating that it could be considered as an alternative to reducing cardiovascular risk in patients with PAD.
Asexual but Not Clonal: Evolutionary Processes in Automictic Populations
Authors: Engelstädter Jan 
Published: April 2017

AbstractMany parthenogenetically reproducing animals produce offspring not clonally but through different mechanisms collectively referred to as automixis. Here, meiosis proceeds normally but is followed by a fusion of meiotic products that restores diploidy. This mechanism typically leads to a reduction in heterozygosity among the offspring compared to the mother. Following a derivation of the rate at which heterozygosity is lost at one and two loci, depending on the number of crossovers between loci and centromere, a number of models are developed to gain a better understanding of basic evolutionary processes in automictic populations. Analytical results are obtained for the expected neutral genetic variation, effective population size, mutation–selection balance, selection with overdominance, the spread of beneficial mutations, and selection on crossover rates. These results are complemented by numerical investigations elucidating how associative overdominance (two off-phase deleterious mutations at linked loci behaving like an overdominant locus) can in some cases maintain heterozygosity for prolonged times, and how clonal interference affects adaptation in automictic populations. These results suggest that although automictic populations are expected to suffer from the lack of gene shuffling with other individuals, they are nevertheless, in some respects, superior to both clonal and outbreeding sexual populations in the way they respond to beneficial and deleterious mutations. Implications for related genetic systems such as intratetrad mating, clonal reproduction, selfing, as well as different forms of mixed sexual and automictic reproduction are discussed.
Properties of Mitotic and Meiotic Recombination in the Tandemly-Repeated CUP1 Gene Cluster in the Yeast Saccharomyces cerevisiae
Authors: Zhao Ying , Dominska Margaret , Petrova Aleksandra , Bagshaw Halle , Kokoska Robert J , Petes Thomas D 
Published: April 2017

Abstract
In the yeast Saccharomyces cerevisiae, the genes encoding the metallothionein protein Cup1 are located in a tandem array on chromosome VIII. Using a diploid strain that is heterozygous for an insertion of a selectable marker (URA3) within this tandem array, and heterozygous for markers flanking the array, we measured interhomolog recombination and intra/sister chromatid exchange in the CUP1 locus. The rate of intra/sister chromatid recombination exceeded the rate of interhomolog recombination by &gt;10-fold. Loss of the Rad51 and Rad52 proteins, required for most interhomolog recombination, led to a relatively small reduction of recombination in the CUP1 array. Although interhomolog mitotic recombination in the CUP1 locus is elevated relative to the average genomic region, we found that interhomolog meiotic recombination in the array is reduced compared to most regions. Lastly, we showed that high levels of copper (previously shown to elevate CUP1 transcription) lead to a substantial elevation in rate of both interhomolog and intra/sister chromatid recombination in the CUP1 array; recombination events that delete the URA3 insertion from the CUP1 array occur at a rate of &gt;10−3/division in unselected cells. This rate is almost three orders of magnitude higher than observed for mitotic recombination events involving single-copy genes. In summary, our study shows that some of the basic properties of recombination differ considerably between single-copy and tandemly-repeated genes.
Characterization of MIPs Using Heterogeneous Binding Models
Authors: Shimizu Ken D. 
Published: April 2017

AbstractNew methods are presented for characterizing MIPs. These methods address the problems of quantitatively comparing the binding properties of different MIPs. Heterogeneous binding models were applied to MIPs based on an exponentially decaying distribution known as the Freundlich isotherm. The Freundlich isotherm was found to accurately model the binding isotherm of the majority of non-covalently imprinted MIPs. Using this model the experimental binding isotherm can be fit in log-log form to a linear equation from which the fitting parameters can be used to plot a quantitative affinity distribution which is a plot of the number of sites with respect to the binding constant of those sites. Comparison of MIPs using this methodology allowed for simpler and more accurate assessment of the binding properties than by previous methods such as the limiting slopes analysese of curved Scatchard plots.
Micromolding in Capillaries for the Generation of Molecularly Imprinted Polymer Filaments and Microstructures
Authors: Yan Mingdi 
Published: April 2017

AbstractThe technique of micromolding in capillary has been employed to prepare molecularly imprinted polymer microfilaments, and to pattern MIP structures on silicon wafers. The approach relies on crosslinked poly(dimethylsiloxane) that contains relief structures as a mold to define the shape and size of the imprinted polymers. This article describes the processes leading to the fabrication of free-standing MIP micromonoliths and covalently immobilized MIP microstructures on silicon wafers. The limitations of the technique are also discussed. The development of miniaturized systems for chemical, analytical and diagnostic applications has attracted great interest recently.1,2,3 Significant advantages in speed, efficiency and control can be gained through the application of such miniature systems in laboratory testing. Micro devices have been fabricated to perform a variety of chemical and enzymatic reactions and in chip capillary electrophoresis separation. Much effort has also been devoted to shrinking analytical instruments such as high performance liquid chromatography4, combinatorial library screening system, and biosensors.6,7Molecular recognition and interactions play central roles in these applications. Molecular imprinting, a technique for the synthesis of polymeric materials with analyte-specific recognition properties, is an attractive alternative to natural recognition systems such as antibodies and receptors.8,9,10 The ability to generate molecularly imprinted polymer (MIP) microstructures on devices should open new possibilities towards the development of miniaturized systems for chemical, analytical and diagnostic applications. The added advantages of long-term stability and chemical resistivity of MIPs may make these “intelligent chips” attractive for instrument and device fabrication.We have employed a soft lithography11,12 technique, micromolding in capillaries (MIMIC),13,14 to fabricate MIP microstructures on silicon wafers. In MIMIC, an elastomeric stamp is placed in an intimate contact with the solid substrate. The recessed microchannels on the stamp form a network of empty capillaries. When a low-viscosity fluid precursor is placed in close contact at one end, it spontaneously fills the channels by capillary actions. Curing of the fluid leaves patterned microstructures on the substrate surface (Figure 1). An attractive feature of this technique is that the size and shape of the MIPs can be easily controlled and altered by those on the PDMS stamps. In addition, the process can be carried out conveniently in a chemical laboratory. Once the master mold is made, many elastomeric stamps can be cast and used repeatedly.
Binding Studies on Resins Imprinted with (S)-naproxen
Authors: Hu Yue , Orwoll Robert A. 
Published: April 2017

AbstractResins were prepared in a free-radical polymerization of 4-vinylpyridine and ethylene glycol dimethacrylate in the presence of (S)-(+)-6-methoxy-α-methyl-2-naphtaleneacetic acid ((S)-naproxen). Initially (S)-naproxen, the imprinted molecule template, was assembled with the monomer 4-vinylpyridine by non-covalent interactions. After the polymerization, stepwise removal of the template left binding sites that retain complementary specificity and affinity. Binding parameters including the maximum number of binding sites and dissociation constant were calculated from the amount of template removed using a two-site Scatchard equation. The results are typical of other systems reported in the literature.
Efficient Atomization Using MHz MEMS-Based Ultrasonic Nozzles
Authors: Tsai Shirley C. , Song Yu L. , Chou Yuan F. , Cheng J.H , Tsai Chen S. 
Published: April 2017

AbstractThis paper reports on the preliminary results of atomization using micro-electro-mechanical system (MEMS)-based 3-Fourier horn 0.5 MHz silicon ultrasonic nozzles. The droplets produced are monodisperse with 7.1 μm drop diameter in good agreement with that predicted by pure capillary wave atomization mechanism. This drop diameter is much smaller than that obtainable using conventional ultrasonic nebulizers operating at three times higher frequency.
Multi-Layer Photopolymer Micromachining
Authors: Huang J. R. , Bai B. , Shaw J. , Jackson T. N. , Wei C. Y. , Manivannan V. , Durocher K. 
Published: April 2017

AbstractThis paper presents a novel method to create and integrate micro-machined devices and high aspect-ratio (height-to-width ratio) microstructures in which the microstructures are built up using multiple layers of photopolymer film and/or viscous solution. Very high aspect-ratio 2-and 3-dimensional (2-D and 3-D) microstructures were constructed by stacking photo-imageable polymer films. Such films may be dry films applied by lamination or solution layers applied by bar coating, or doctor blade coating. Photolithography is used in both cases to define the microstructure. This additive process of thin-film micromachining facilitates high aspect-ratio microstructure fabrication. We have demonstrated structures of up to 12-layers comprising 2-D arrays of deep trenches (180 μm deep and 25 μm wide) and a 2-layer SU-8 micro-trench array with an aspect ratio up to 36 on glass substrates. Miniaturized structures of interconnected reservoirs as small as 50 μm × 50 μm × 15 μm (∼38 pico liter storage capacity) are also being fabricated, along with a novel 5-layer microfluidic channel array and a vacuum-infiltration process for fluid manipulation. This method has the potential to create functional large-area micro-devices at low-cost and with increased device flexibility, durability, prototyping speed, and reduced process complexity for applications in optoelectronics, integrated detectors, and bio-devices. The novel multi-layer photopolymer dry film and solution process also allows microstructures in micro-electro-mechanical systems (MEMS) to be built with ease and provides the functionality of MEMS integration with electronic devices and integrated circuits (ICs).
Nanocomposite Thin Film Coatings for Protection of Materials Surfaces
Authors: Asmatulu R. , Claus R.O. , Mecham J.B. , Corcoran S.G. , Wang Y.X. 
Published: April 2017

AbstractThe present study deals with nanocomposite thin film coating, analysis and application steps for the corroding surfaces. Silica nanoparticles were incorporated into epoxy polymers, and then the obtained polymeric nanocomposites were sprayed on the Al coupons by a nozzle sprayer at different thicknesses. A urethane top layer was also coated on some of initially coated surfaces. Several electrochemical impedance spectroscopy (EIS) tests were conducted on the prepared samples using 0.5 M NaCl solution. The test results showed that the Al coupons coated by nanocomposites and urethane top coating gave the excellent corrosion resistance against the corrosion attack. As a result, it is assumed that the nanostructured coating system will allow military, private companies and government agencies to effectively protect the materials surfaces against corrosion.
Interpretation of the Phonon Frequency Shifts in ZnO Quantum Dots
Authors: Alim Khan A. , Fonoberov Vladimir A. , Balandin Alexander A. 
Published: April 2017

AbstractNanostructures made of zinc oxide (ZnO), a wide-bandgap semiconductor, have recently attracted attention due to their proposed applications in low-voltage and short-wavelength (368 nm) electro-optical devices, transparent ultraviolet (UV) protection films, gas sensors, and varistors. Raman spectroscopy presents a powerful tool for identifying specific materials in complex structures and for extracting useful information on properties of nanoscale objects. At the same time the origin of Raman peak deviation from the bulk values is not always well understood for new material systems. There are three main mechanisms that can induce phonon shifts in the free-standing undoped ZnO nanostructures: (i) phonon confinement by the quantum dot boundaries; (ii) phonon localization on defects and (iii) the laser-induced heating in nanostructure ensembles. Here, we report results of the combined non-resonant and resonant Raman scattering studies of an ensemble of ZnO quantum dots with diameter 20 nm. Based on our experimental data, we have been able to identify the origin of the observed phonon frequency shifts. It has been found that the ultraviolet laser heating of the ensemble induces a large red shift of the phonon frequencies. It is calculated that the observed red shift of 14 cm-1 corresponds to the local temperature of the quantum dot ensemble of about 700°C.
Composition Influence on the Properties of Titanium-Doped Gamma Iron Oxide Nanoparticles Prepared by Laser Pyrolysis Method
Authors: Morjan Ion , Alexandrescu Rodica , Dumitrache Florian , Sandu Ion , Scarisoreanu Monica , Albu Lavinia , Soare Iuliana , Voicu Ion , David Bohumil , Schneeweiss Oldrich , Fleaca Claudiu , Popovici Ernest , Ciupina Victor 
Published: April 2017

AbstractThe aim of this work is the structural and sensing characterization of titanium-doped gamma iron oxide nanocomposites. These nanopowder materials were synthesized by the laser pyrolysis technique. It is based on the resonance between the emission of a CW CO2 laser line and the infrared absorption band of a gas (vapour) precursor. Basically, sensitised iron pentacarbonyl and titanium tetrachloride-based mixtures were used as gas-phase reactants. The compositional characterization of the synthesized nanostructures was performed by means of different analytical techniques. Introducing Ti in the Fe2O3 network in small quantities (< 1 %) seems to have little influence on titanium doped powder morphology (mean grain size ∼ 5nm) but increases the sensitivity of titanium doped iron oxide nanopowders with more then 20 % relatively to pure maghemite.
Influence of Growth Parameters and Annealing on Properties of MBE Grown GaAsSbN SQWs
Authors: Wu Liangjin , Iyer Shanthi , Nunna Kalyan , Bharatan Sudhakar , Li Jia , Collis Ward J. 
Published: April 2017

AbstractIn this paper we report the growth of GaAsSbN/GaAs single quantum well (SQW) heterostructures by molecular beam epitaxy (MBE) and their properties. A systematic study has been carried out to determine the effect of growth conditions, such as the source shutter opening sequence and substrate temperature, on the structural and optical properties of the layers. The substrate temperatures in the range of 450-470 °C were found to be optimal. Simultaneous opening of the source shutters (SS) resulted in N incorporation almost independent of substrate temperature and Sb incorporation higher at lower substrate temperatures.The effects of ex-situ annealing in nitrogen ambient and in-situ annealing under As overpressure on the optical properties of the layers have also been investigated. A significant increase in photoluminescence (PL) intensity with reduced full width at half maxima (FWHM) in conjunction with a blue shift in the emission energy was observed on annealing the samples. In in-situ annealed samples, the PL line shapes were more symmetric and the temperature dependence of the PL peak energy indicated significant decrease in the exciton localization energy as exhibited by a less pronounced “S-shaped curve”. The “inverted S-shaped curve” observed in the temperature dependence of PL FWHM is also discussed. 1.61 μm emission with FWHM of 25 meV at 20K has been obtained in in-situ annealed GaAsSbN/GaAs SQW grown at 470 °C by SS.