bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fatigue Life and Microstructure after Multiple Remelting of A359 Matrix Composites Reinforced with SiC Particles
Authors: Klasik A. , Maj M. , Pietrzak K. , Wojciechowski A. , Sobczak J. 
Published: January 2017

Abstract
The article presents the results of fatigue life tests and microstructure examinations of A359 alloy matrix composites (F3S.10S and F3S.30S) containing 10 and 30wt% of SiC particles, subjected to multiple remelting by conventional gravity casting. Mechanical characteristics were determined in a modified low cycle fatigue (MLCF) test, enabling rapid estimation of fatigue life and other mechanical parameters in practice of any material. Qualitative and quantitative metallographic examinations were also carried out. The quantitative evaluation of microstructure was performed by computer image analysis. A set of geometrical parameters of the reinforcing particles, pores and eutectic precipitates present in the metal matrix was determined. The relationships between the mechanical parameters, structural characteristics and the number of remelting operations were presented. It was found that up to the fourth remelting, the mechanical characteristics, including fatigue life, are slightly deteriorated but decrease gradually in the subsequent operations of remelting. The observed effect is mainly due to the shrinkage porosity occurring as a result of gravity casting. To eliminate this defect, the use of squeeze casting process was recommended. It has also been shown that multiple remelting can be an easy and economically well-founded alternative to other more expensive recycling methods.
Investigation of the Results of Combined Reclamation on the Particular Stages of Grain Matrix Recovery
Authors: Łucarz M. , Dańko R. , Dereń M. , Skrzyński M. 
Published: January 2017

Abstract
In this article, there were presented the results of research on combined mechanical and thermal regeneration of waste moulding sand with furfuryl resin originated from one of national foundries manufacturing aluminium alloys castings. Attempts of mechanical reclamation were led on the REGMAS reclaimer enabling to realize preliminary and primary reclamation with use of two modes of mechanical interactions on waste moulding sand. In the first attempt the reclaimer worked without any additional regenerating elements, and as the second solution, the reclaimer operated with additional crushing and abrasive elements to increase the result of primary reclamation. Thermal reclamation was led in the prototypic thermal reclaimer, enabling to fully control the process of grain matrix recovery. As a result of completed investigations the small efficiency of mechanical reclamation was determined. However, use of combined regeneration allowed for obtaining grain matrix of high purity. Thermal regeneration was conducted in prototypic thermal reclaimer. Evaluation of reclaim (reclaimed material) quality was carried out in the way of iginition losses and grain-size analysis, surface morphology and also by executing of strength testing of moulding sand prepared on obtained grain matrix for the particular reclamation operations.
Prediction of Microstructure in ADI Castings
Authors: Guzik E. , Sokolnicki M. , Królikowski M. , Ronduda M. , Nowak A. 
Published: January 2017

Abstract
Tests were carried out on samples of low-alloy ductile iron with additions of Ni, Cu and Mo, subjected to austempering heat treatment. The samples were austenitized at 850, 900 and 950 °C, and then austempered at T = 210, 240, 270, 300 and 330 °C. The ausferritizing treatment was carried out in a salt bath for the time τ = 2 - 8 hours. Additionally, tests and studies covered samples subjected to the ausferritizing treatment at 270 °C with the time of holding castings in a bath from 2 to 24 hours. Evaluation covered the results of the ADI microstructure examinations and hardness measurements. The ADI matrix morphology was identified counting the average number of ausferrite plates and measuring their width and spacing. The regression equations HB = f (τ, T) and τ = f (HB, T) were derived to establish the, so-called, “process window”, allowing obtaining a priori the required microstructure of ADI and, consequently, the required mechanical properties, mainly hardness, shaping the functional properties of castings, abrasion wear resistance – in particular.
Parallel communicating grammar systems with context-free components are Turing complete for any communication model
Authors: Wilkin Mary Sarah Ruth , Bruda Stefan D. 
Published: January 2017

Abstract
Parallel Communicating Grammar Systems (PCGS) were introduced as a language-theoretic treatment of concurrent systems. A PCGS extends the concept of a grammar to a structure that consists of several grammars working in parallel, communicating with each other, and so contributing to the generation of strings. PCGS are usually more powerful than a single grammar of the same type; PCGS with context-free components (CF-PCGS) in particular were shown to be Turing complete. However, this result only holds when a specific type of communication (which we call broadcast communication, as opposed to one-step communication) is used. We expand the original construction that showed Turing completeness so that broadcast communication is eliminated at the expense of introducing a significant number of additional, helper component grammars. We thus show that CF-PCGS with one-step communication are also Turing complete. We introduce in the process several techniques that may be usable in other constructions and may be capable of removing broadcast communication in general.
Jet browser model accelerated by GPUs
Authors: Forster Richárd , Ágnes Fülöp 
Published: January 2017

Abstract
In the last centuries the experimental particle physics began to develop thank to growing capacity of computers among others. It is allowed to know the structure of the matter to level of quark gluon. Plasma in the strong interaction. Experimental evidences supported the theory to measure the predicted results. Since its inception the researchers are interested in the track reconstruction. We studied the jet browser model, which was developed for 4π calorimeter. This method works on the measurement data set, which contain the components of interaction points in the detector space and it allows to examine the trajectory reconstruction of the final state particles. We keep the total energy in constant values and it satisfies the Gauss law. Using GPUs the evaluation of the model can be drastically accelerated, as we were able to achieve up to 223 fold speedup compared to a CPU based parallel implementation.
Satellite image fusion using fuzzy logic
Authors: Kumaraswamy Suda , Srinivasa Rao Dammavalam , Naveen Kumar Nuthanapati 
Published: January 2017

Abstract
Image fusion is a method of combining the Multispectral (MS) and Panchromatic (PAN) images into one image contains more information than any of the input. Image fusion aim is to decrease unknown and weaken common data in the fused output image at the same time improving necessary information. Fused images are helpful in various applications like, remote sensing, computer vision, biometrics, change detection, image analysis and image classification. Conventional fusion methods are having some side effects like assertive spatial information and uncertain color information is an usually the problem in PCA and wavelet transform based fusion is a computationally in depth process. In order to overcome these side effects and to propose alternative soft computing fusion approach for conventional fusion methods we exploit image fusion using fuzzy logic technique to fuse two source images obtained from different sensors to enhance both spectral and spatial information. The proposed work here further compared with two common fusion methods like, principal component analysis (PCA) and wavelet transform along with quality assessment metrics. Exploratory outputs demonstrated in order that fuzzy based image fusion technique can actively retains more information compared to PCA and wavelet transform approaches while enhancing the spatial and spectral resolution of the satellite images.
Convergence Analysis of a Three Step Newton-like Method for Nonlinear Equations in Banach Space under Weak Conditions
Authors: Argyros Ioannis K. , George Santhosh 
Published: January 2017

Abstract
In the present paper, we study the local convergence analysis of a fifth convergence order method considered by Sharma and Guha in [15] to solve equations in Banach space. Using our idea of restricted convergence domains we extend the applicability of this method. Numerical examples where earlier results cannot apply to solve equations but our results can apply are also given in this study.
A new design and a weighting strategy of a survey on tourist activity of the Croatian population
Authors: Gligorova Lidija , Kožul Marijana 
Published: January 2017

Abstract
Until 2014, the sample for the statistical survey Tourist Activity of the Population of the Republic of Croatia, shortly named as TADS, was a quota sample. The sample selection and the data collection for the survey in the Computer Assisted Telephone Interviewing (CATI) mode were conducted by a hired marketing research agency. In the summer of 2014, the Croatian Bureau of Statistics (CBS) set up its own call centre for CATI surveys. At the beginning of 2015, the CBS started developing a new probability sample design and a weighting strategy of TADS. The surveys of all the four quarters of 2015, fully conducted by the CBS, were treated as test surveys. The purpose of this paper is to describe and evaluate the finally accepted overlapping dual-frame survey design and a weighting procedure based on the sample data collected in all the quarters of 2015. The paper shows how the new design is incorporated in the existing circumstances in which surveys are conducted. The overlapping dual-frame survey design of TADS produces survey estimates related to the whole survey population based on two independent samples from two overlapping sampling frames (the first sampling frame consists of landline phone numbers from the phone book and the second one consists of mobile phone numbers from the phone book). In spite of a large undercoverage of the survey population in the phone book, using both phone types in TADS improves the total coverage of the survey population and relieves a problem of coverage and response bias. The applied weighting procedure is described systematically. The probability sampling allows calculating quality indicators such as standard errors of survey estimates and helps optimizing the survey process.
Anthomyzidae (Diptera) of Iturup Island (Russia: Kuril Islands)
Authors: Roháček Jindřich , Przhiboro Andrey 
Published: January 2017

AbstractNew records of Anthomyzidae (Diptera) from the Iturup Island (Kuril archipelago, Far Eastern Russia) are presented based on the material collected by the expedition to this island in 2011. Five species of Anthomyza are recorded, including three species new to the local dipterous fauna, viz. A. collini Andersson, 1976, A. elbergi Andersson, 1976 and A. flavosterna Sueyoshi & Roháček, 2003; moreover, A. collini is recorded from the E. Palaearctic region for the first time. Distribution and biology are reviewed for each of the seven species of Anthomyzidae known from the Iturup I. with the new information obtained. Biodiversity of Anthomyzidae in the Iturup I. is discussed with respect to the faunas known from adjacent areas.
New records of Gypsophila perfoliata (Caryophyllaceae) in Poland
Authors: Pliszko Artur 
Published: January 2017

Abstract
The paper presents two new records of alien Gypsophila perfoliata in Poland. It was found on 16 September 2016 in Bodzanów and Łapczyca, Lesser Poland Voivodeship, southern Poland, growing on roadside slopes and in roadside ditch. The updated map of distribution is presented using the ATPOL cartogram method, and the pathways of introduction and spreading are discussed.
Automated Metabolic P System Placement in FPGA
Authors: Kulakovskis Darius , Navakauskas Dalius 
Published: January 2017

Abstract
An original Very High Speed Integrated Circuit Hardware Description Language (VHDL) code generation tool that can be used to automate Metabolic P (MP) system implementation in hardware such as Field Programmable Gate Arrays (FPGA) is described. Unlike P systems, MP systems use a single membrane in their computations. Nevertheless, there are many biological processes that have been successfully modeled by MP systems in software. This is the first attempt to analyze MP system hardware implementations. Two different MP systems are investigated with the purpose of verifying the developed software: the model of glucose–insulin interactions in the Intravenous Glucose Tolerance Test (IVGTT), and the Non-Photochemical Quenching process. The implemented systems’ calculation accuracy and hardware resource usage are examined. It is found that code generation tool works adequately; however, a final decision has to be done by the developer because sometimes several implementation architecture alternatives have to be considered. As an archetypical example serves the IVGTT MP systems’ 21–23 bits FPGA implementation manifesting this in the Digital Signal Processor (DSP), slice, and 4-input LUT usage.
TCP Performance in Multi-Polling Game Theory-Based IEEE 802.11 Networks
Authors: Cuzanauskas Tomas , Anskaitis Aurimas 
Published: January 2017

AbstractEasy usage and integration with various applications made IEEE 802.11 one of the most used technologies these days, both at home and business premises. Over the years, there have been many additional improvements to the 802.11 standards. Nevertheless, the algorithms and Media Access Control (MAC) layer methods are almost the same as in previous Wi-Fi versions. In this paper, a set of methods to improve the total system capacity is proposed – such as efficient transmit power management based on Game Theory with a custom wireless medium protocol. The transmit power management and wireless medium protocol is verified by both simulation and real application scenarios. The results conclude that the capacity of the proposed wireless medium protocol is overall 20 percent higher than the standard 802.11 wireless medium access protocols. Additional TCP Acknowledgment filtering, which was tested together with the proposed wireless medium access protocol, can provide up to 10-percent-higher TCP throughput in high-density scenarios, especially for asymmetrical traffic cases. The conducted research suggests that efficient power management could result in lighter transmit power allocation rules that are currently set by the local regulators for current Wi-Fi devices. Thus, better propagation characteristics and wireless medium management would lead to an overall higher wireless system capacity.
The Interdependence of Leader-Member Exchange Relation and the Leadership Style: Research in Serbian Organisations
Authors: Stojanović Aleksić Vesna , Stanisavljević Milena , Bošković Aleksandra 
Published: January 2017

AbstractThe interdependence of leader behaviour, leadership styles and interpersonal relations with followers suggests a need to investigate various aspects of leadership from the perspective of a follower, which is the main subject of the paper. The study aims to determine the quality of leader-member exchange (LMX) in order to reach a conclusion on whether the perception of followers on the quality of LMX affects the leadership style and which style is the most commonly used. The empirical research was conducted in 2015, in the Republic of Serbia, on a sample of 100 respondents, employees in 12 organisations, using the survey method. The results show there is the highest positive correlation between high quality LMX and participatory leadership style. In the opinion of the followers, achievement-oriented style is the most common, regardless of the fact that there are high quality LMX in the majority of companies in the sample. The importance of research is in highlighting the role of followers in the process of organisational leadership, as active and equal participants. Practical contribution is reflected in giving guidance for leaders for more active involvement of followers in the decision making process and adapting leadership style to specific traits of followers and the situational circumstances. Studies of this type are not often in the local organisational theory and practice.
Between Urban and Rural: Sustainability of Small Towns in the Czech Republic
Authors: Vaishar Antonín , Zapletalová Jana , Nováková Eva 
Published: January 2017

AbstractThe paper analyses the position of small towns in the Czech settlement system. It deals with the definition of small towns, their geographical positions, demographic characteristics and functions in the national settlement system. A typology of small towns aimed at individual pillars of their sustainability is one of the results of the paper. The article discusses the position of small towns as part of the urban world and their position as a part of the countryside. It concludes that small towns are functionally important as rural centres. However, differences between urban and rural seem to be less important than differences among individual types of the Czech countryside (suburban, intermediate, inner periphery, borderland).
An overview of maritime pine private non-industrial forest in the centre of Portugal: A 19-year case study
Authors: Alegria Cristina , Canavarro Teixeira Maria 
Published: January 2017

Abstract
Portuguese national policies for forests were developed considering related themes such as climate change, forest health, fire and the protective functions of forests. In Portugal, maritime pine forest is mainly private non-industrial and its area is in decline. Therefore, the aim of this study was two-fold: first, to assess maritime pine forest characteristics over a 19-year period; second, to analyse forest cover change over that period. In the end, the implementation of state policies was explored. A study area highly forested by continuous areas of naturally regenerated maritime pine in the centre of Portugal was used. To assess maritime pine forest characteristics, two sets of inventory data collected in previous studies (1991-1996 and 2007-2010) were used. To analyse forest cover change, the official land cover maps for 1990 and 2007 were used. This study findings highlighted that study area’s trends over the past years were the following: first, the decrease of maritime pine forest areas and its management decline (stands less stable, under-stocked, with large amounts of small-diameter poles and enlarged tree size variability); second, the increase of scrubland areas; third, the increase of eucalyptus afforestation with no regard for protection areas; and fourth, the absence of native oaks or introduction of other broadleaves as recommended by the state policies. Therefore, it is argued that there is a need for effective field monitoring actions with regard to the implementation of state policies. Additionally, selective incentives are key to mobilise private non-industrial forest to achieve the goals of state forest policies.
Root biomass of Fagus sylvatica L. stands depending on the climatic conditions
Authors: Grygoruk Dorota 
Published: January 2017

Abstract
Fine root biomass of forest trees is a recognised indicator of environmental changes in the conditions of global climate change. The present study was carried out in six old-growth beech forests (112-140 years) located in different climatic conditions on the range border of Fagus sylvatica L. in Poland. The root biomass was investigated by soil coring method in the upper soil layers (0-5 cm, 5-15 cm and total layer 0-15 cm). The significantly greater total root biomass was found in the beech stands, which characterised by higher average precipitation and lower average annual temperatures in the period 2000-2005. The share of roots of diameter > 5 mm increased with increasing depth of top soils. Biomass of fine roots (diameter ≤ 2 mm) decreased with increasing depth of upper soil layers. The average biomass of fine roots ranged from 175.36 to 418.16 g m-2 in the soil layer 0-15 cm. The significant differences of fine root biomass were found between studied stands in the soil layers 0-5 cm and 0-15 cm. Also, it was found significant positive correlation between fine root biomass in the soil layer 0-15 cm and precipitation during the growing season in 2006. Precipitation in the study period was connected with very high rainfall in August 2006, repeatedly exceeding the long-term monthly levels. Regional climatic conditions, in that extreme weather events in growing seasons can significantly to affect changes of fine root biomass of forest trees, consequently, changes of relationships between the growth of above- and below-ground of the old-growth forest stands.
The local Langlands conjecture for p-adic GSpin4, GSpin6, and their inner forms
Authors: Asgari Mahdi , Choiy Kwangho 
Published: January 2017

Abstract
We establish the local Langlands conjecture for small rank general spin groups

GSpin
4

{\mathrm{GSpin}_{4}}

and

GSpin
6

{\mathrm{GSpin}_{6}}

as well as their inner forms. We construct appropriate
L-packets and prove that these L-packets satisfy the properties expected of
them to the extent that the corresponding local factors are available. We are also able to
determine the exact sizes of the L-packets in many cases.
Variable exponent Herz type Besov and Triebel–Lizorkin spaces
Authors: Xu Jingshi , Yang Xiaodi 
Published: January 2017

Abstract
We establish the boundedness of the vector-valued Hardy–Littlewood maximal operator in variable exponent Herz spaces, which were introduced by Samko in [33].
We also introduce variable exponent Herz type Besov and Triebel–Lizorkin spaces and give characterizations of these new spaces by maximal functions.
Multi-Objective Optimal Operation for Transmission Systems Considering Voltage Stability
Authors: Furukakoi Masahiro , Howlader Harun Or Rashid , Shigenobu Ryuto , Senjyu Tomonobu 
Published: January 2017

Abstract
Due to the liberalization of electric power market, many power producers are entering into the power market. Most of electric power company have been introduced renewable energies that might increase the power system uncertainty. Therefore, it is expected that rise might the likelihood of voltage instability and voltage collapse. In addition, fluctuations in supply and demand are increased by the introduction of a renewable energies. However, by using the Energy storage systems (ESS), the power fluctuations can be reduced. On account of this, we suggest the optimal operation method of the generator and the ESS by considering the voltage stability in this paper. The effectiveness of the proposed method is verified by simulation results in the Matlab/simulink.
Modeling of Tea Infusion Kinetics Incorporating Swelling Kinetics
Authors: Farakte Raosaheb A. , Yadav Geeta U. , Joshi Bhushan S. , Patwardhan Ashwin W. , Singh Gurmeet 
Published: January 2017

Abstract
Mathematical model to predict tea infusion kinetics which accounts for swelling kinetics of tea granules is presented. Swelling kinetics of tea granules has never been taken into account for models developed so far. Differential equations (DEs) for concentration of tea constituents inside tea granule with respect to radius and time were derived. Solution methodology for these DEs is developed based on Crank-Nicholson scheme. Tea infusion profile is obtained using this model by knowing the swelling kinetics, partition constant and initial contents in tea granules. Diffusivity and product of interfacial area (As
) and backward rate constant (k
−1) are the fitting parameters. Model prediction is fitted to the experimental data published previously (R
2 = 0.90–0.98). The fitted diffusivity (3.33 × 10−10 m2/s) and Ask
−1 (2 m3/(kg.s)) predicted the infusion profile of other sized tea granules very well. This model predicts the infusion during initial stage very accurately without any empirical parameter.