bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessment of the Peripheral Blood Flow of Lower Limbs in Patients with Diabetes Mellitus with the Use of Digital Photoplethysmography
Authors: Hubena G. , Osina O. , Prindesova Busikova , Vasicko T. 
Published: October 2015

Abstract
Introduction: The microcirculation of the lower limbs (LL) of diabetics is influenced by hyperglycemia and several factors (hypertension, obesity, dyslipidemia) leading to the functional and later the structural changes, manifesting as dysregulation of the peripheral blood flow.
Materials and Methods: The study included 39 patients with type 2 diabetes, and the same number of the control group. The digital photoplethysmography (PPG) was used for assessment of the peripheral circulation with reflectance mode, sensing from the 1st and 2nd toe of the LL after acclimatisation of the patient in the supine position. The subjects were also asked to refrain from smoking, to avoid drinks containing caffeine and using of medicaments with vasodilatator function at least 2 hours before examination.
Results: The pulse amplitudes and the peak times of the PPG curves were significantly higher in diabetic group than in the control group. The mean pulse amplitudes in diabetics were in the range of 0.69 % 0.86 %, the pulse peak time in the range of 140 - 154 ms. The mean pulse amplitudes in the control group were in the range of 0.37 0.54 %, the mean pulse peak time were in the range of 120 - 133 ms. The PPG findings of the LL were symmetrical (non-significant t-test). We have not found a correlation between the PPG records and duration, compensation of diabetes, age, glycemia, blood pressure, dyslipidemia, smoking and obesity.
Conclusion: This simple-to-use technique shows the increased total skin microcirculation in diabetic patients. Microvascular shunting of blood presenting in peripheral nerves and in the skin of diabetic feet are responsible for reduced hyperemia response to any inflammatory process with the increased susceptibility for inquiring the diabetic foot infection.
Topology optimization for elastic base under rectangular plate subjected to moving load
Authors: Jilavyan Samvel H. , Khurshudyan Asatur Zh. 
Published: October 2015

AbstractDistribution optimization of elastic material under elastic isotropic rectangular thin plate subjected to concentrated moving load is investigated in the present paper. The aim of optimization is to damp its vibrations in finite (fixed) time. Accepting Kirchhoff hypothesis with respect to the plate and Winkler hypothesis with respect to the base, the mathematical model of the problem is constructed as two-dimensional bilinear equation, i.e. linear in state and control function. The maximal quantity of the base material is taken as optimality criterion to be minimized. The Fourier distributional transform and the Bubnov-Galerkin procedures are used to reduce the problem to integral equality type constraints. The explicit solution in terms of two- dimensional Heaviside‘s function is obtained, describing piecewise-continuous distribution of the material. The determination of the switching points is reduced to a problem of nonlinear programming. Data from numerical analysis are presented.
Experiments on the Model Testing of the 2nd Phase of Die Casting Process Compared with the Results of Numerical Simulation
Authors: Dańko R. , Dańko J. , Stojek J. 
Published: October 2015

Abstract
Experiments of filling the model moulds cavity of various inner shapes inserted in rectangular cavity of the casting die (dimensions: 280 mm (height) × 190 mm (width) × 10 mm (depth) by applying model liquids of various density and viscosity are presented in the paper. Influence of die venting as well as inlet system area and inlet velocity on the volumetric rate of filling of the model liquid - achieved by means of filming the process in the system of a cold-chamber casting die was tested. Experiments compared with the results of simulation performed by means of the calculation module Novacast (Novaflow&Solid) for the selected various casting conditions - are also presented in the paper.
New Materials in the Production of Moulding and Core Sands
Authors: Dobosz St. M. , Major-Gabryś K. , Grabarczyk A. 
Published: October 2015

Abstract
The article shows the influence of environment requirements on changes in different foundry moulding sands technologies such as cold box, self-hardening moulding sands and green sands. The aim of the article is to show the possibility of using the biodegradable materials as binders (or parts of binders’ compositions) for foundry moulding and core sands. The authors concentrated on the possibility of preparing new binders consisting of typical synthetic resins - commonly used in foundry practice - and biodegradable materials. According to own research it is presumed that using biodegradable materials as a part of new binders’ compositions may cause not only lower toxicity and better ability to reclaim, but may also accelerate the biodegradation rate of used binders. What’s more, using some kinds of biodegradable materials may improve flexibility of moulding sands with polymeric binder. The conducted research was introductory and took into account bending strength and thermal properties of furan moulding sands with biodegradable material (PCL). The research proved that new biodegradable additive did not decrease the tested properties.
Production Scheduling under Fuzziness for the Furnace - Casting Line System
Authors: Duda J. , Stawowy A. 
Published: October 2015

Abstract
The problem considered in the paper is motivated by production planning in a foundry equipped with a furnace and a casting line, which provides a variety of castings in various grades of cast iron/steel for a large number of customers. The goal is to create the order of the melted metal loads to prevent delays in delivery of goods to customers. This problem is generally considered as a lot-sizing and scheduling problem. However, contrary to the classic approach, we assumed the fuzzy nature of the demand set for a given day. The paper describes a genetic algorithm adapted to take into account the fuzzy parameters of simultaneous grouping and scheduling tasks and presents the results achieved by the algorithm for example test problem.
Utilisation of Products of the Thermal Reclamation of Post Reclamation Dusts in the Production Technology of Ceramic Building Materials
Authors: Holtzer M. , Dańko R. , Dańko J. , Pytel Z. 
Published: October 2015

Abstract
The problem related to the management of post reclamation dusts generated in the reclamation process of waste moulding sands with organic binders is presented in the hereby paper. Waste materials generated in this process are products hazardous for the environment and should be utilised. The prototype stand for the utilisation of this dangerous material in its co-burning with coal was developed and patented in AGH in Krakow. The stand was installed in one of the domestic casting houses. As the utilisation result the transformed waste product is obtained and its management in the production of ceramic materials constitutes the subject of the presented publication.
Chosen Aspects of Quality Defects of ”Alphin” Inserts in Combustions Pistons
Authors: Piątkowskia J. , Kamiński P. 
Published: October 2015

Abstract
The chosen, typical causes of quality defects of cast-iron „alphin” rings embedded in aluminum cast are being presented in this paper. Diffusive joint of those inserts with the pistons casts is being used, due to extreme work conditions of destructive influence of the fuel mix and variable thermo-mechanical loads, which reign in the combustion motor working chamber.
Effect of Vanadium and Molybdenum on the Crystallization, Microstructure and Properties of Hypoeutectic Silumin
Authors: Szymczak T. , Gumienny G. , Pacyniak T. 
Published: October 2015

Abstract
The paper presents the results of hypoeutectic silumin 226 grade and silumin produced on its basis through the addition of V and Mo. Vanadium and molybdenum were added as the preliminary alloy AlV10 and AlMo8 in an amount providing the concentration of 0.1; 0.2; 0.3 and 0.4% V and Mo. TDA curves of tested silumins were presented; regardless of the chemical composition there were similar thermal effects. Pressure castings microstructure research revealed the presence in silumins with the addition of V and Mo phases do not occur in silumin without these additives. These phases have a morphology similar to the walled, and their size increases with increasing concentration of V and Mo. The size of the precipitates of these phases silumin containing 0.1% V and Mo does not exceed 10 microns, while 0.4% of the content of these elements increases to about 80 microns. Tests of basic mechanical properties of silumins were carried out. It has been shown that the highest values of tensile strength Rm = 295 MPa and elongation A = 4.2% have silumin containing approximately 0.1% V and Mo. Increasing concentrations of these elements causes a gradual lowering of the Rm and A values.
The Effect of Shell Thickness, Insulation and Casting Temperature on Defects Formation During Investment Casting of Ni-base Turbine Blades
Authors: Raza M. , Irwin M. , Fagerström B. 
Published: October 2015

Abstract
Turbine blades have complex geometries with free form surface. Blades have different thickness at the trailing and leading edges as well as sharp bends at the chord-tip shroud junction and sharp fins at the tip shroud. In investment casting of blades, shrinkage at the tip-shroud and cord junction is a common casting problem. Because of high temperature applications, grain structure is also critical in these castings in order to avoid creep. The aim of this work is to evaluate the effect of different process parameters, such as, shell thickness, insulation and casting temperature on shrinkage porosity and grain size. The test geometry used in this study was a thin-walled air-foil structure which is representative of a typical hot-gas-path rotating turbine component. It was observed that, in thin sections, increased shell thickness helps to increase the feeding distance and thus avoid interdendritic shrinkage. It was also observed that grain size is not significantly affected by shell thickness in thin sections. Slower cooling rate due to the added insulation and steeper thermal gradient at metal mold interface induced by the thicker shell not only helps to avoid shrinkage porosity but also increases fill-ability in thinner sections.
Quantitative analysis of arbutin and hydroquinone in strawberry tree (Arbutus unedo L., Ericaceae) leaves by gas chromatography-mass spectrometry / Kvantitativna analiza arbutina i hidrokinona u listovima obične planike (Arbutus unedo L., Ericaceae) plinskokromatografskom metodom uz detekciju masenim spektrometrom
Authors: Jurica Karlo , Karačonji Irena Brčić , Šegan Sandra , Opsenica Dušanka Milojković , Kremer Dario 
Published: October 2015

Abstract
The phenolic glycoside arbutin and its metabolite with uroantiseptic activity hydroquinone occur naturally in the leaves of various medicinal plants and spices. In this study, an extraction procedure coupled with gas chromatography-mass spectrometry (GC-MS) was developed to determine arbutin and hydroquinone content in strawberry tree (Arbutus unedo L., Ericaceae) leaves. The method showed good linearity (R2>0.9987) in the tested concentration range (0.5-200 μg mL-1), as well as good precision (RSD<5 %), analytical recovery (96.2-98.0 %), and sensitivity (limit of detection=0.009 and 0.004 μg mL-1 for arbutin and hydroquinone, respectively). The results obtained by the validated GC-MS method corresponded well to those obtained by high performance liquid chromatography (HPLC) method. The proposed method was then applied for determining arbutin and hydroquinone content in methanolic leaf extracts. The amount of arbutin in the leaves collected on the island of Koločep (6.82 mg g-1 dry weight) was found to be higher (tpaired=43.57, tc=2.92) in comparison to the amount of arbutin in the leaves collected on the island of Mali Lošinj (2.75 mg g-1 dry weight). Hydroquinone was not detected in any of the samples. The analytical features of the proposed GC-MS method demonstrated that arbutin and hydroquinone could be determined alternatively by gas chromatography. Due to its wide concentration range, the method could also be suitable for arbutin and hydroquinone analysis in leaves of other plant families (Rosaceae, Lamiaceae, etc.).
Environmentally Sustainable Apparel Acquisition and Disposal Behaviours among Slovenian Consumers
Authors: Žurga Zala , Hladnik Aleš , Forte Tavčer Petra 
Published: October 2015

Abstract
Fibre production and textile processing comprise various industries that consume large amounts of energy and resources. Textiles are a largely untapped consumer commodity with a strong reuse and recycling potential, still fibres and fibre containing products ends up in landfill sites or in waste incinerators to a large extent. Reuse and recycle of waste clothing results in reduction in the environmental burden. Between 3% and 4% of the municipal solid waste stream in Slovenia is composed of apparel and textiles. This exploratory study examines consumer practices regarding purchase and the disposal of apparel in Slovenia. Data were collected through structured online survey from a representative random sample of 535 consumers. Responses to online questionnaire indicated the use of a variety of textile purchase and disposal methods. The influence of different sociodemographic variables on apparel purchase, disposal and recycling behaviour was examined. Moreover, the differences in the frequency of apparel recycling between consumers with and without an apparel bank available nearby were explored. This research was conducted, since it is crucial to analyse the means by which consumers are currently disposing their textile waste in order to plan the strategies that would encourage them to further reduce the amount of apparel sent to landfills.
A Note On The First Class Approaches Of Massive P-Forms
Authors: Sararu S. C. , Udristioiu M. T. 
Published: October 2015

Abstract
The problem of quantization of the massive p-forms is considered in the framework of the Batalin-Fradkin (BF) approach based on path integral. The quantization procedure relies on the path integral of a first-class system equivalent with the original theory. This first-class system is constructed using the BF method.
Calculation Of The Crystal Field Parameters For Eu3+ Doped In SrAl2O4 And SrIn2O4 Spinels
Authors: Stanciu M. L. 
Published: October 2015

Abstract
Strontium aluminate (SrAl2O4) and the indium aluminate (SrIn2O4) spinels have been proven to be efficient host materials, which offer the possibility of generating broadband emission after doping with rare earth trivalent ions. The present work is devoted to the calculation of the crystal field parameters and the energy levels of the trivalent europium doped in SrAl2O4 and SrIn2O4 spinels, using the superposition model of the crystal field. Using the intrinsic parameters for Eu3+-O2− bonds, and the geometry structure of the each crystal, we modeled the CFPs and simulated the low-lying energy levels schemes. The obtained results are compared with the experimental data and discussed.
Evaluation of Emotiv EEG neuroheadset
Authors: Wójcik Grzegorz M. , Wierzgała Piotr , Gajos Anna 
Published: October 2015

Abstract
Electroencephalography (EEG) has become more popular, and as a result, the market grows with new EEG products. The new EEG solutions offer higher mobility, easier application, and lower price. One of such devices that recently became popular is Emotiv EEG. It has been already tested in various applications concerning brain-computer interfaces, neuromarketing, language processing, and detection of the P-300 component, with a general result that it is capable of recording satisfying research data. However, no one has tested and described its usefulness in long-term research. This article presents experience from using Emotiv EEG in two research projects that involved 39 subjects for 22 sessions. Emotiv EEG has significant technical issues concerning the quality of its screw threads. Two complete and successful solutions to this problem are described.
Trends and Opportunities in Computer Science OER Development
Authors: Dichev Christo , Dicheva Darina , Agre Gennady , Angelova Galia 
Published: October 2015

Abstract
The world is embracing an open education model. The success of this process implies an adequate awareness, an assumption that is inconsistent with recent reports and statistical facts. Despite the major advances in recent years, Open Educational Resources (OER) are still not in the mainstream of Computer Science course development. Motivated by the need to fill this gap, this paper analyzes the evolution of the OER development and the emerging trends relevant to Computer Science education. The aim is to raise the awareness and promote a practical transition process towards an adequate model that aligns the interests of all stakeholders.
Parameter Selection of a Support Vector Machine, Based on a Chaotic Particle Swarm Optimization Algorithm
Authors: Dong Huang , Jian Gao 
Published: October 2015

Abstract
This paper proposes a SVM (Support Vector Machine) parameter selection based on CPSO (Chaotic Particle Swarm Optimization), in order to determine the optimal parameters of the support vector machine quickly and efficiently. SVMs are new methods being developed, based on statistical learning theory. Training a SVM can be formulated as a quadratic programming problem. The parameter selection of SVMs must be done before solving the QP (Quadratic Programming) problem. The PSO (Particle Swarm Optimization) algorithm is applied in the course of SVM parameter selection. Due to the sensitivity and frequency of the initial value of the chaotic motion, the PSO algorithm is also applied to improve the particle swarm optimization, so as to improve the global search ability of the particles. The simulation results show that the improved CPSO can find more easily the global optimum and reduce the number of iterations, which also makes the search for a group of optimal parameters of SVM quicker and more efficient.
Solving Multicriteria Optimization Problems with WebOptim Software System
Authors: Staykov Boris 
Published: October 2015

Abstract
This paper is a presentation of a web based decision support system “WebOptim” for solving single and multiple criteria optimization problems. It targets a wide range of user typeseducators, researchers, managers and business people. It also provides two types of communication interfaces user friendly graphical interface for human interaction and programming interface for machine communication with other third party software systems. The interfaces facilitate the problem solving process of different types of optimization problems, mainly single and multi-objective programming optimization problems with continuous or integer variables.
A Voltammetric Technique Using A Modified Carbon Paste Electrode For The Determination Of Aclonifen
Authors: Novotný Vít , Barek Jiří 
Published: October 2015

Abstract
A method for the determination of aclonifen at a carbon paste electrode modified with tricresyl phosphate has been developed. The optimum electrochemical regime proved to be differential pulse voltammetry (DPV) in the negative potential range from −200 to −1600 mV. The optimum pH for the determination proved to be pH = 8. The calibration dependence is linear and the limit of detection achieved for the method was 2·10−6 mol/dm3. The method is fast, reliable and it is suitable for the detection of aclonifen in the concentration range from 2·10−6 to 1·10−4 mol/dm3.
Digital Competences of Maria Grzegorzewska Academy of Special Education Students – Method and Results of a Survey
Authors: Romaniuk Miłosz W. 
Published: October 2015

Abstract
Author analyses the use of new technologies by the pedagogy students from the generation of digital natives focusing on using the functions of mobile electronic devices and basic functions of Internet. Data has been collected with Google Forms. They allow to collect the data very quick, to see the responses immediately and to export the data to a spreadsheet. The aim of the study is to determine the level of student’s competence on the chosen field of information technology. Research shows that students have lower skills than they declare. Author advocates that this situation needs to be improved.
Dimensionality Reduction for Probabilistic Neural Network in Medical Data Classification Problems
Authors: Kusy Maciej 
Published: October 2015

Abstract
This article presents the study regarding the problem of dimensionality reduction in training data sets used for classification tasks performed by the probabilistic neural network (PNN). Two methods for this purpose are proposed. The first solution is based on the feature selection approach where a single decision tree and a random forest algorithm are adopted to select data features. The second solution relies on applying the feature extraction procedure which utilizes the principal component analysis algorithm. Depending on the form of the smoothing parameter, different types of PNN models are explored. The prediction ability of PNNs trained on original and reduced data sets is determined with the use of a 10-fold cross validation procedure.
Investigation Of Chromium-Cobalt Coated Scaffolds On Cell Cultures In Vitro
Authors: Kiradzhiyska Denitsa D. , Mantcheva Rositsa D. , Mileva Detelina L. , Draganova Krasimira I. , Feodorova Yana N. , Sarafan Victoria S. , Draganov Marian M. 
Published: October 2015

Abstract
Introduction: The use of diverse materials for medical purposes is continuously expanding. The modification of materials which are routinely applied in medical practice as well as the development and introduction of new materials require studies on their biological activity. The first steps in this process are the preliminary short-term screening tests for cytotoxicity and biocompatibility performed on cell cultures.
Methods: Coating of stainless steel (316 L) scaffolds with chromium-cobalt was performed by electroplating using the non-standard electrolyte Chromispel. The process was carried through at different cathode current densities and deposition times. The modified surface of the metal scaffolds was studied for cytoxicity and cell vitality on the serum-free McCoy-Plovdiv and the immortalized PDL cell cultures.
Results: Our results indicate no cytotoxic effect of the coated metal scaffolds. Even more, three of the samples stimulated the proliferation and growth of McCoy-Plovdiv cells.
Conclusion: We have strong reasons to believe that chromium-cobalt coatings are promising for future studies and reliable for medical purposes.