bluuebunny/crossref_metadata_2025 huggingface dataset:
A Note on the Paper ”Fractional Order Pettis Integral Equations with Multiple Time Delay in Banach Spaces” by M. Benchohra and F.-Z. Mostefai
Authors: Cichoń Mieczysław
Published: May 2018

On a recent paper Benchohra and Mostefai [2] presented some existence results for an integral equation of fractional order with multiple time delay in Banach spaces. In contrast to the classical case, when assumptions are expressed in terms of the strong topology, they considered another case, namely with the weak topology. It has some consequences for the proof. We present here some comments and corrections.
Application of Discrete Cross-Correlation Function for Observational-Comparative Navigation System
Authors: Matuszewski Jan , Grzywacz Wojciech
Published: May 2018

The article presents navigation system project operating on the principle scene matching area correlation (SMAC), using a digital camera, an MEMS e-compass sensor and an ultrasonic ranging module. Systems of this type are used as a component of advanced integrated navigation systems in view of its autonomy and capability of localizing aircrafts with high accuracy and precision. Steering and display of information are implemented using a computer application designed in Matlab programming environment. The object’s location is fixed, using discrete cross-correlation function through matching of the registered terrain image to digital orthophotomap.

The article describes operations directly related to digital image processing, its implementation methods, a structural system design with explanations of each of the functional elements and presents devices used to build a complete integrated measurement unit model. It was used for the effectiveness measurement of determining the location of an object depending on the changes of angle and height of the flight as well as the luminance and noise level in a registered image. The measurements methodology was described which also includes an analysis of the results, an effectiveness evaluation and potential development directions of the designed system.
Horizontal Accuracy Issues During MBES Surveys
Authors: Iwen Dominik
Published: May 2018

High-resolution Multibeam Echosounder shallow water surveys should not be performed with DGPS (Differential Global Positioning System), especially where feature detection is a priority. Despite the fact that International Hydrographic Organization most demanding Special Order Specification allows for 2 meters horizontal positioning level, it poorly interacts with horizontal centimetric level nadir footprint, causing degradation of bathy-metric data.
The BICS — Advanced Method of the Electronic Ship Reporting for the RIS Centre
Authors: Lisaj Andrzej , Smacki Andrzej , Uriasz Janusz
Published: May 2018

The article presents principles of transmission and processing of the data in electronic reporting of river ships used in inland navigation. The new standard of electronic reporting of ships was shown — system Barge Information and Communication System (BICS). Results and analysis of surveys of real duplex transmission of data in BICS system for purpose of RIS Centre were presented.
The Modernization of the Mrzezyno Seaport. Applying Simulation Studies to Define the Variants of the Expansion of the Entrance Breakwater
Authors: Boć Renata , Gucma Lucjan , Bąk Andrzej
Published: May 2018

Objective reasons, such as climatic changes, larger vessels, sometimes the impracticality of the current solutions, determine the interest of decision-makers in rebuilding the existing ports and breakwaters. Tested simulation models allow for a thorough analysis of the possible modernization variants taking into account the variability of basic parameters. The article presents research results related to the optimization of the Mrzezyno seaport with respect to navigation safety and the possibility of larger vessels calling at the port after its modernization.

In the paper, real time simulation methods based on manoeuvre simulators were applied. Two different variants that can be implemented from the technical point of view were studied. Following a multidimensional analysis that took into consideration increased comfort of ship manoeuvres in the port and navigation safety, one variant was indicated as the optimum. The aim of the research results is to help design new solutions in the case of the modernization of the Mrzezyno seaport.
Application of IGS Products for Air Navigation
Authors: Jafernik Henryk , Ćwiklak Janusz , Krasuski Kamil , Kozuba Jarosław
Published: May 2018

Single Point Positioning (SPP) method is widely used in air, marine, and land navigation to determine the user’s position in real time and post factum. A typical accuracy for this method of determining the user’s position in the static mode is approximately 10 meters. In air operations, the SPP method accuracy can be several times lower and that may cause problems with precise positioning of an aircraft. The authors of this article presented preliminary results of research concerning aircraft positioning in the kinematic mode based on GPS observations. For this purpose, an in-flight experiment, in which a Cessna 172 aircraft was used, was performed at the airport in Mielec, Poland. The aircraft was equipped with a dual-frequency Topcon TPS HiperPro receiver, which was recording satellite observations with 1-second interval. The aircraft position was determined using the least-squares method (LSM) in the RTKLIB (RTKPOST module) software. Two research tests were performed within the scope of the experiment, i.e. in test I the aircraft position was determined on the basis of raw GPS observations and the broadcast ephemeris data whereas in test II precision products of the IGS were used, such as: precise ephemeris SP3, DCB hardware delay, clock bias data of GPS satellites and receivers in the CLK format, data of the ionosphere maps based on IONEX format, and phase center calibration of GPS satellites and receivers in the ANTEX format. The use of the IGS precision products improved the accuracy of the X coordinate to 1 m, Y to 0.7 m and Z to 1.3 m. On the basis of tests I and II, an additional RMS-3D parameter was determined, whose mean value was 4 m.
Investigation of exhaust gas temperature distribution within a furnace of a stoker fired boiler as a function of its operating parameters
Authors: Krawczyk Piotr , Badyda Krzysztof , Szczygieł Jacek , Młynarz Szczepan
Published: May 2018

Distribution of the exhaust gas temperature within the furnace of a grate boiler greatly depends on its operating parameters such as output. It has a considerably different character than temperature distributions in other types of boilers (with pulverised or fluidised bed), as it varies considerably across the chamber. Results presented in this paper have been obtained through research of a grate-fired hot water boiler with a nominal rating of some 30 MW. Measurements have been taken by introducing temperature sensors into prearranged openings placed in the boiler side walls. Investigation has been carried out for different output levels. Tests involved thermocouples in ceramic coating and aspirated thermocouples. The latter were used to eliminate influence of radiative heat transfer on measured results. Values obtained with both methods have been cross-checked.
Possibility of using adsorption refrigeration unit in district heating network
Authors: Grzebielec Andrzej , Rusowicz Artur , Jaworski Maciej , Laskowski Rafał
Published: May 2018

Adsorption refrigeration systems are able to work with heat sources of temperature starting with 50 °C. The aim of the article is to determine whether in terms of technical and economic issues adsorption refrigeration equipment can work as elements that produce cold using hot water from the district heating network. For this purpose, examined was the work of the adsorption air conditioning equipment cooperating with drycooler, and the opportunities offered by the district heating network in Warsaw during the summer. It turns out that the efficiency of the adsorption device from the economic perspective is not sufficient for production of cold even during the transitional period. The main problem is not the low temperature of the water supply, but the large difference between the coefficients of performance, COPs, of adsorption device and a traditional compressor air conditioning unit. When outside air temperature is 25 °C, the COP of the compressor type reaches a value of 4.49, whereas that of the adsorption device in the same conditions is 0.14. The ratio of the COPs is 32. At the same time ratio between the price of 1 kWh of electric power and 1 kWh of heat is only 2.85. Adsorption refrigeration equipment to be able to compete with compressor devices, should feature COPads efficiency to be greater than 1.52. At such a low driving temperature and even changing the drycooler into the evaporative cooler it is not currently possible to achieve.
Analysis of nodalization effects on the prediction error of generalized finite element method used for dynamic modeling of hot water storage tank
Authors: Wołowicz Marcin , Kupecki Jakub , Wawryniuk Katarzyna , Milewski Jarosław , Motyliński Konrad
Published: May 2018

The paper presents dynamic model of hot water storage tank. The literature review has been made. Analysis of effects of nodalization on the prediction error of generalized finite element method (GFEM) is provided. The model takes into account eleven various parameters, such as: flue gases volumetric flow rate to the spiral, inlet water temperature, outlet water flow rate, etc. Boiler is also described by sizing parameters, nozzle parameters and heat loss including ambient temperature. The model has been validated on existing data. Adequate laboratory experiments were provided. The comparison between 1-, 5-, 10- and 50-zone boiler is presented. Comparison between experiment and simulations for different zone numbers of the boiler model is presented on the plots. The reason of differences between experiment and simulation is explained.
Experimental and numerical investigation of thermal flow meter
Authors: Cebula Artur
Published: May 2018

The paper presents analytical and numerical model calculation results of the temperature distribution along the thermal flow meter. Results show a very good conformity between numerical and analytical model. Apart from the calculation results the experimental investigations are presented. The author performed the test where a temperature of duct wall surface was measured. The relation between mass flow rate in terms of the duct surface temperature difference was developed.
Biogas Production Based On Miscanthus × Giganteus (Miscanthus Sinensis Anderss.) Within Dry Fermentation Process
Authors: Porvaz Pavol , Gaduš Ján , Tóth Štefan , Jóvér János
Published: May 2018

“Dry fermentation“ technology may be used for energy recovery of phytomass substrate which has dry matter content from 20 to 60%. In agriculture sector, while only rarely used, it is a very perspective technology at such types of biomass – phytomass which is not recommended to be processed within “wet fermentation” (process is energetically and operationally very costly). For detecting the suitability of Miscanthus × giganteus phytomass to biogas for production through dry fermentation process, as well as determining the biogas yield, at the Slovak university of Agriculture (SUA) there has been developed an experimental device enabling the pilot plant trials, which is installed at the biogas station within the area of the VPP SPU Ltd. in Kolíňany. A pilot plant experiment of biogas production based on Miscanthus × giganteus (Miscanthus sinensis Anderss.) phytomass within dry fermentation process was carried out at the period from 25 February to 25 March 2013. The monitored production of biogas was based on the substrate mixture of components formed as follows: the biomass from preceding cycle (farmyard manure) and ensilage from Miscanthus phytomass. In these experiments the amount of produced biogas, analysis of biogas and the input substrate were materialized by standard methodology. On base of the obtained results, we can formulate the conclusion: the tested substrate mainly consists of Miscanthus phytomass and manure was suitable for biogas production technology and anaerobic dry fermentation process. The yield of Miscanthus substrate in our experiments was around 117 litres of biogas per 1 kg of dry matter silage. For assurance of the continuity and uniformity in the production of biogas by dry fermentation process, the multiple-fermentation chamber is needed, which must be saturated gradually with dosing interval. This dosing interval is caused by residence time and the number of chambers. For example, at the residence time of 28 days and 4 chambers, the need of the substrate change will be on weekly base in each chamber.
Influence of Cow Dung Application on the Yield and Yield Components of Two Groundnut (Arachis hypogaea L.) Varieties in Sokoto, Semi-arid Zone of Nigeria
Authors: Musa Mukhtar , Singh Ajit
Published: May 2018

Groundnut (Arachis hypogaea L.) is a valuable crop for millions of small scale farmers around the tropics. Despite its importance, the production of the crop in semi-arid tropics is constrained by shorter rain duration and low soil nutrient status. The present studies was carried out during the 2007 and 2008 rainy seasons to study the influence of cow dung application on the yield and yield components of two groundnut varieties in the region. Treatments consisted of factorial combination of two groundnut varieties (Ex-Dakar and RMP-12) and three cow dung levels (0, 15 and 30 t ha−1) making a total of six treatment combinations. The treatments were laid out in a randomized complete block design replicated three times. The findings of this research revealed that Ex-Dakar variety performed better than RMP-12 in all the parameters measured. Application of cow dung increased the number of pods plant−1, pod yield and grain yield of the crop and was optimum at the rate of 15 t ha−1. Thus, Ex-Dakar variety could be suggested for increased groundnut production in the study area. Application of cow dung at the rate of 15 t ha−1 was optimum for groundnut production in the study area.
Probiotic Yoghurts From Ultrafiltered Concentrated Milk
Authors: Kozludzhova Siyka , Goranov Bogdan , Boyanova Petya , Yanakieva Velichka , Dushkova Mariya , Dinkov Kolyo
Published: May 2018

In this paper, yoghurts from ultrafiltered concentrated whole milk with a volume reduction ratio 0, 2 and 3 with three different probiotic yoghurt starters were obtained. Their physiological, microbiological and rheological properties were examined. The concentrated probiotic yoghurts had high concentration of viable cells of the probiotic strain Lactobacillus delbrueckii ssp. bulgaricus (over 1010cfu/cm3). For the preparation of concentrated probiotic yoghurts the most appropriate volume reduction ratio was 2. The probiotic yoghurts with starters MZ2 and 1CM had the best structure. The concentrated probiotic yoghurts with all starters are functional foods.
Influence of Tool Balancing in High Speed Machining
Authors: Bašovská Klaudia , Peterka Jozef
Published: May 2018

The high speed machining (HSM) is now considered as one of the key manufacturing technologies for higher throughput and productivity. HSM used higher rotational speed of the spindle (40,000 min-1 and higher). With increasing high speed spindle rotations raises a number of dynamic forces. Even a small mass unbalance in the spindle and tooling generates tool vibration. Tool vibration shortens tool life and lowers the quality of the machined surface. It is necessary to minimize this vibration by balancing tool and tool holder. The balancing process improves the mass distribution of a cutting tool and its holder, allowing the combination of the two to rotate with the minimum amount of unbalanced centrifugal forces. Machining with balanced tool will provide better surface quality, accuracy and less tool and machine wear. In this study is focused on unbalance cutting tools, definitions, balancing techniques, sources, effects, processes and machineries. The aim of this article was to examine the relationship between unbalance and tool holders used in high speed metalworking machine tools
Experimental Researches Regarding the Distribution of the Deformations on Incremental Formed Parts
Authors: Chera Ionuţ Moise , Bologa Octavian
Published: May 2018

The goal of this research is to present results regarding the variation of the deformations on the surface of the incremental formed parts. The experiments were performed on a custom layout by means of a KUKA industrial robot and the measurement of the sheet metal deformations was done using ARAMIS optical measurement system. The custom layout allows for the measurement of the deformations to take place during the actual forming process
Odel of Dynamic Integration of Lean Shop Floor Management Within the Organizational Management System
Authors: Iuga Virginia , Kifor Claudiu
Published: May 2018

The key to achieve a sustainable development lies in the customer satisfaction through improved quality, reduced cost, reduced delivery lead times and proper communication. The objective of the lean manufacturing system (LMS) is to identify and eliminate the processes and resources which do not add value to a product. The following paper aims to present a proposal of further development of integrated management systems in organizations through the implementation of lean shop floor management. In the first part of the paper, a dynamic model of the implementation steps will be presented. Furthermore, the paper underlines the importance of implementing a lean culture parallel with each step of integrating the lean methods and tools. The paper also describes the Toyota philosophy, tools, and the supporting lean culture necessary to implementing an efficient lean system in productive organizations
Research on Application of Neural Networks in Organizational Management
Authors: Marinescu Simona-Ioana
Published: May 2018

Since there is no clear definition of the terms "neural network" and "neuronal network", this paper is aimed primarily to establish the difference between them by a range of comparative research. Using a chart, the three parts that make up the structure of a neuron will be compared with the structure of an organization to determine who does in terms of role, in order to reproduce the neuron in the structuring level of an organization and give a meaning to the term of "organizational neuron."
Study of the Influence of Cutting Regime Parameters on Grinding Forces in Processing Tungsten Carbide Dk460uf
Authors: Vulc Silvia
Published: May 2018

This paper presents a study on grinding tungsten carbide DK460UF, through experimental investigation using diamond grinding wheel with 54 μm grain size. Different sets of experiments were performed to study the effects of the independent grinding parameters such as grinding wheel speed, feed and depth of cut on cutting forces. Test results showed that the feed and depth of cut influence significantly the cutting forces. The research was lead to optimize the process parameters for reducing cutting forces. In this way, for different parameters of cutting regime, it were measured the values of the components of the grinding force, tangential component, Ft and normal component Fn. The results of the experiment showed that it is better to use great speeds and small feed rate and depth of cut in grinding tungsten carbides, such as DK460UF
Identification of new superwarfarin-type rodenticides by structural similarity. The docking of ligands on the vitamin K epoxide reductase enzyme’s active site
Authors: Ferencz László , Muntean Daniela Lucia
Published: May 2018

The rodenticide brodifacoum is highly toxic to mammals and birds, and extremely toxic to fish. It is a highly cumulative poison due to its high lipophilicity and extremely slow elimination. For this reason, it may be interesting to find similar compounds in order to enlarge the spectrum of vitamin K epoxide reductase enzyme inhibitors used today in pest control. We used the Similar Compounds search type of the Chemical Structure Search of the PubChem Compound Database to locate records that are similar to the chemical structure of brodifacoum, using pre-specified similarity thresholds. Using the threshold ≥ than 95% for the similar structures criteria, we found 14 compounds (from over 30 million entries) that meet this criteria. Two of these compounds have a better binding affinity to vitamin K epoxide reductase enzyme than brodifacoum, but the binding energy of the other 12 substances is also high, having identical or lower lipophilicity; consequently, they will eliminate faster, possibly lacking a part of the adverse effects.
A historical survey of the Corunca Castle, Romania, based on the military survey maps and present-day measurements
Authors: Kovács Lóránt
Published: May 2018

Corunca is situated at 4.5 km SE from Târgu-Mureș, near the Salt Stream, the Bozeni Stream, and the Vațman Stream. Its area is inhabited from ancient times. Both prehistoric and Roman findings were reported to have been found within the village boundaries. Its neighbouring medieval village, Sárvári, perished in the 16th century, while Kisernye was devastated by Turkish troops in 1661. The settlement was first recorded in 1332 as Korunka. The Reformed Church was built between 1769 and 1778, while its spire dates from 1793. The earlier church was surrended by high protective walls, which were demolished in 1769.

The extremely ruinous castle with its neoclassical façade and a couple of neighbouring farm buildings appear on the left side of the European route E60 travelling from Târgu-Mureș to Sighișoara. Today, this is a barren place, although once it was surrounded by a grove the size of 120 cadastral acres [2].

During the reign of John Sigismund Zápolya, Prince of Transylvania and ruler of a part of the Kingdom of Hungary, the village belonged to Thomas Mihályfy. The castle was ravaged in 1562 by the revolted Szeklers. After the fall of the Mihályfy family, the Chancellor of Transylvania, Farkas Kovacsóczi owned the estate, which later came down to the Tholdalagi family. The Tholdalagi family belongs to one of the great magnate families of Transylvania, with nicknames deriving from Ercea and Iclod, but originating from Toldal, Mureș County, Romania – their ancient demesne from the 16th century. Mihály I. Tholdalagi (1580–1673), one of the wisest diplomats in the Principality, reshaped the original building to an impressive castle in the 1630s, whose size and adjoining buildings are described in the Inventory dating from 1680. The first members of the Tholdalagi family came to Transylvania from Hungary. According to the family traditions, and also mentioned in their Certificate of Count, their ancestor is the extinguished Alaghi family member, András, who obtained Toldalag settlement together with its neighbouring Ercse in 1453; hence the nickname “Ercsei”. Thus, Mihály Tholdalagi’s parents were Balázs from Gáldtő and Borbála Bessenyei [1].
Rural Youth, Agriculture, And Entrepreneurship: A Case-Study of Hungarian and Romanian Young Villagers
Authors: Olah Şerban , Flora Gavril
Published: May 2018

This paper analyses the involvement of Romanian and Hungarian young villagers in the local agriculture and entrepreneurial activities. The first part provides an outlook on the historical evolution and the current situation of agriculture and rural development in Romania and Hungary from the perspective of theoretical positions formulated within economics and the sociology of entrepreneurship as well as rural sociology. The second part discusses the results of a cross-border research and social intervention project conducted in the period of 2012-2013 in ten rural localities from the shared Hungarian–Romanian border region. The questionnaire included questions regarding rural youth integration in the labour market, agriculture, and involvement in entrepreneurial activities as well as social and religious participation. The research has found significant differences between Romanian and Hungarian young villagers with respect to the examined questions.
‘Malenkey Robot’ in the Carpathian Basin, in Hungary – Data, Facts, Interpretations, Connections
Authors: Bognár Zalán
Published: May 2018

Interpretation problems related to the notion of ‘malenkaya rabota,’ POW, internee, GULAG and GUPVI. Ways of classification of the victims of ‘malenkaya rabota' in the Carpathian Basin, various groups and types. Determination of the effective number of the groups, and of the total number of those deported as civilians from the 14.7 million inhabitants of the Hungary of the time, based on different data, and the difficulties of definitions. The interpretation and implementation of the central Soviet commands. The connections between the deportations. Similarities and differences between the deportations as internee and as POW. Manageability of the data, interpretation of Soviet and Hungarian archive data and the reasons why they are different. The real value of Soviet archival sources. The determination of the losses attributed to ‘malenkaya rabota’.
Exerting the Principle of Collective Guilt against the Transcarpathian Hungarians and Germans (Carrying into Effect the Decisions of the Military Council of the 4th Ukrainian Front in the Light of the NKVD1 Reports)
Authors: Dupka György
Published: May 2018

In his paper, Gyorgy Dupka deals with the tragic fate of the Transcarpathian Hungarians and Germans deported for ‘a three-day labour’ in the period of 1944-1946. During the past twenty years, he succeeded in collecting and, in some measure, publicizing sufficient archival materials to open up the facts of the anomies committed by the Soviet military authorities in the fall of 1944 and at the beginning of 1945. All these facts are supported by cogent data and concrete names of the perpetrators. In his paper, the author shows primarily how in the light of the reports conceived by the NKVD and other Soviet central military administrations Order 0036 of the Military Council of the 4th Ukrainian Front was carried into effect.
A result regarding monotonicity of the Gamma function
Authors: Kupán Pál A. , Márton Gyöngyvér , Szász Róbert
Published: May 2018

In this paper we analyze the monotony of the function

ln
 
Γ
(
x
)

ln
 
(

x
2

+
τ
)
-
ln
 
(
x
+
τ
)

${{{\rm{ln}}\,\Gamma ({\rm{x}})} \over {{\rm{ln}}\,({\rm{x}}^2 + \tau) - {\rm{ln}}\,({\rm{x}} + \tau)}}$

, for τ > 0. Such functions have been used from different authors to obtain inequalities concerning the gamma function.
Neural Flows in Hopfield Network Approach
Authors: Ionescu Carmen , Panaitescu Emilian , Stoicescu Mihai
Published: May 2018

In most of the applications involving neural networks, the main problem consists in finding an optimal procedure to reduce the real neuron to simpler models which still express the biological complexity but allow highlighting the main characteristics of the system. We effectively investigate a simple reduction procedure which leads from complex models of Hodgkin-Huxley type to very convenient binary models of Hopfield type. The reduction will allow to describe the neuron interconnections in a quite large network and to obtain information concerning its symmetry and stability. Both cases, on homogeneous voltage across the membrane and inhomogeneous voltage along the axon will be tackled out. Few numerical simulations of the neural flow based on the cable-equation will be also presented.
Analysis of Metal Content in Soil in Timis County
Authors: Stefu N. , Neculae A. , Turcu L. , Balint A.
Published: May 2018

The paper reports on the presence of various metals in soil in Timis county. A set of 18 samples were collected from different points of interest. The metal content of the samples was investigated using a handheld XRF Niton XLp 300 GOLDD analyzer. Special attention was paid to the metals with harmful potential to humans. Based on the obtained results, a set of conclusions on the environment’s health was drawn.
On The Information-Theoretical Entropy for Some Quantum Oscillators
Authors: Popov Dušan , Pop Nicolina , Șimon Simona
Published: May 2018

The information-theoretical entropy, also called the “classical” entropy, was introduced by Wehrl in terms of the Glauber coherent states (CSs) | z > , i.e. the CSs corresponding to the one-dimensional harmonic oscillator (HO-1D). In the present paper, we have focused our attention on the examination of the information-theoretical entropy, i.e. the Wehrl entropy, for both the pure and the mixed (thermal) states of some quantum oscillators.
The Aharonov-Bohm Effect and Transport Properties in Graphene Nanostructures
Authors: Lungu Mihai , Giugiulan Raluca , Lungu Antoanetta , Bunoiu Madalin , Neculae Adrian
Published: May 2018

This paper investigates the possibility to improve the filtering process of flue gas by separation of suspended nanoparticle using dielectrophoresis. The study focuses on the particles having an average radius of about 50-150 nm, that cannot be filtrated by classical techniques but have a harmful effect for environment and human health. The size distribution nanoparticles collected from the flue gas filters of a hazardous waste incinerator plant were evaluated. Based on obtained experimental data and a proposed mathematical model, the concentration distribution of nanoparticle suspended in flue gas inside a microfluidic separation device was analyzed by numerical simulations, using the finite element method. The performances of the device were described in terms of three new specific quantities related to the separation process, namely Recovery, Purity and Separation Efficiency. The simulations could provide the optimal values of control parameters for separation process, and aim to be a useful tool in designing microfluidic devices for separating nanoparticle from combustion gases.
Improving The Accuracy of the Empirical Clear Sky Solar Irradiance Models
Authors: Mares Oana , Vizman Daniel , Paulescu Marius
Published: May 2018

This paper is focused on improving the quality of nowcasting solar irradiance by enhancing the clear sky component of the model. A simple linear correction for the average atmospheric transmittance is proposed. The correction is based on the most recent measurements recorded prior the forecasting moment. The proposed procedure was tested against data measured on the Solar Platform of the West University of Timisoara. Overall results demonstrates a notable improvement in the clear sky model accuracy.
Pre-
performance routines followed by free throw shooting accuracy in secondary basketball players
Authors: Phelps Ashley , Kulinna Pamela
Published: May 2018

Study aim: The purpose of the current study was to determine whether existing pre-performance routines had an effect on free throw shooting accuracy in high school pupils as compared to shooting without a pre-performance routine.

Materials and methods: Participants were 34 freshman high school basketball players. Twenty male (n = 20) and fourteen female (n = 14) of various ethnic backgrounds were randomly assigned to a condition and were asked to implement a pre-performance routine in one condition and a non-pre-performance routine in another condition for free throw shooting. A within subjects crossover design was used to analyse the data based on a pre-performance routine and a non-pre-performance routine framework. The pre-performance routine conditions were considered the experimental conditions. A Missed-Made Shots table was used to track performance (miss-made shots) for the shots in both conditions.

Results: There were differences between the experimental condition (pre-performance routine) and the comparison condition (non-pre-performance routine) Z(22) = –4.61, p < 0.01 with the experimental condition’s median scores out-performing the comparison condition scores; however the differences were very small.

Conclusions: These findings suggest that there were differences between the experimental condition (pre-performance routine) and the comparison condition (non-pre-performance routine). Results suggest that there may be additional relevant factors in addition to pre-performance routines that should be considered in helping youth develop closed motor skills (e.g., mental imagery, physical exertion, outside factors – audience).
Regulation of Unmanned Aerial Systems and Related Privacy Issues in Lithuania
Authors: Pūraitė Aurelija , Bereikienė Daiva , Šilinskė Neringa
Published: May 2018

In the past few years the use of unmanned aerial vehicles in Lithuania has significantly increased. However, enjoying the advantages of this technology, which improves society’s socio-economical safety (public safety in a broad sense), raises some privacy concerns. This article analyses European Union and national legal regulations regarding the use of unmanned aerial vehicles as well as legal tools for defence of the right to privacy or prevention from its breaches in the Republic of Lithuania. Unmanned aerial vehicles have become popular only recently; thus, legislation regarding their use has not yet become a common topic among lawyers. Furthermore, case law of the Republic of Lithuania is silent about it. Thus, the authors model a situation of breach of privacy using an unmanned aerial vehicle and analyse possible defence mechanisms.
Corporate Forms Facilitating Non-Profit Networking: Formalizing the Informal
Authors: Jakulevičienė Lyra , Valutytė Regina
Published: May 2018

Cooperation and networking among a variety of organisations for the purpose of research, projects, and other activities ranges fromad hocto long term organisational relationships, formalised or based on informal cooperation. Although informality is frequently much valued and drives organisations to partner on substance rather than bureaucracy, formalisation of networks and cooperation might be indispensible for effective partnerships and activities, as well as representation of mutual interests beyond the national level. How shall such networks be formalised at European and/or national levels so that they are flexible enough, involve minimum bureaucracy, and engage the maximum scope of possible activities? This article focuses on the analysis of possible legal structures facilitating the work of a group of entities and individuals engaged in cross-border activities. This study examines the potential of national legal opportunities in five countries: Belgium, Estonia, Lithuania, Poland and the Netherlands, and the proven legal form of EEIG in reducing the barriers for cooperation, as well as the advantages and disadvantages of these legal forms for a formalized network and the purposes it serves.
Latent Cell Mortality After Short-Term Exposure Of Nitellopsis Obtusa Cells To Copper Oxide Nanoparticles
Authors: Gylytė Brigita , Manusadžianas Levonas , Sadauskas Kazys , Vitkus Rimantas , Jurkonienė Sigita , Karitonas Rolandas , Petrošius Rimantas , Skridlaitė Gražina , Vaičiūnienė Jūratė
Published: May 2018

The effects of 5 s–24 h exposure to CuO nanosuspension (nCuO) and CuSO4 on mortality of Nitellopsis obtusa cells within 48 days were investigated. Based on LED50 kinetics, a toxicological endpoint of lethal exposure duration that induces 50% cell mortality, it was shown that mortality response of 10-min treated cells (by 3.2 and 24–79.9 mg Cu/l, respectively CuSO4 and nCuO) did not differ after 12th day rewash in control medium. Larger amount of total Cu (in mg/g cell DM) was measured in charophyte cells exposed to nCuO (79.9 mg Cu/l) than to ionic Cu (3.2 mg Cu/l). The lower nCuO-induced mortality than that of Cu2+ during earlier rewash period could be related to the sorption of nanoparticles on the cell wall, which was confirmed by scanning electron microscope images and energy dispersive X-ray spectrum data. Effect threshold, the shortest exposure duration that induces cell mortality significantly different from the control during a post-exposure period, comprised 30 s in 24 mg Cu/l of nCuO, however, it could not be identified and was less than 5 s in 79.9 mg Cu/l of nCuO.
Contribution To The Lichen Flora Of South East Greenland. III. The Coastal Area Between 63° And 65° N
Authors: Hansen Eric Steen
Published: May 2018

The paper lists 95 lichen taxa from the coastal area between 63° and 65° N in South East Greenland. Of these, 46 lichens were recorded for the first time from the area. Lecanora symmicta and Ochrolechia tartarea are new to East Greenland. Acarospora badiofusca, Aspicilia annulata and Parmeliella triptophylla are new to South East Greenland.
Intellectual and Barbarian Figures in Film: The Bear and the Devil
Authors: Keevallik Liina
Published: May 2018

The article suggests that cinematic figures can be divided into two basic groups - barbarian and intellectual. The definition is based on the level of the figures’ intelligibility in the works of Jean-Luc Godard and Andrei Tarkovsky. As Claude Lévi-Strauss’ myth analysis shows, there are structural similarities between cinematic figures and myths, the article searches for a closer, more site-specific link, engaging fairy tales, i.e. local myths, as a more efficient way of observing the distinctive features of the figures in specific regions.
2.5D Sound Field Reproduction Using Higher Order Loudspeakers
Authors: Jia Maoshen , Wang Wenbei , Yang Ziyu
Published: May 2018

Using 3-Dimensional (3D) sound sources as secondary sources to 2-Dimensional (2D) sound field reproduction, it is termed 2.5-Dimensional (2.5D) sound field reproduction which is currently drawing broad interest in acoustic signal processing. In this paper we propose a method to reproduce a 2D sound field, using a circular array of 3D High Order (HO) loudspeakers, which provides a mode matching solution based on 3D wave field translation. Using the spherical addition theorem, we first obtain a spherical harmonics representation of a 2D sound field reproduced by an array of HO loudspeakers. Then, the corresponding relationship between the reproduced sound field and the desired sound field is established by spherical/cylindrical harmonic expansions. Finally, the modal weights of HO loudspeakers are designed by using a least squares method. Simulation results show that the proposed method extends the reproduction region and significantly reduces the required minimum number of loudspeakers over the other referenced methods.
Knowledge Model Based on Graphical Semantic Perception
Authors: Jian Liu , Haisong Huang , Weijie Pan
Published: May 2018

Based on knowledge representation in product design, we propose a knowledge model of the product design process based on graphical semantic perception. The ontology semantic of the product is analyzed together with the product design process knowledge. Then the basic element model for knowledge representation of the product design process is built. With the concepts of the extension origin point basic element and extension vector thus defined, knowledge representation, consisting of growth, convergence and optimization is realized. On this basis, the model for case base clustering based on graphical semantics is built. Feasibility verification is performed with the case of appearance design of a machine tool. The highlight of the proposed method lies in the combination of the formalized and quantitative approach for product appearance design.
Three-Dimensional Image Measurement by Pattern Projection Using a Single Observation Image
Authors: Sun Ke , Lu Cunwei
Published: May 2018

Since three-dimensional image measurement allows object surface shapes and dimensions to be obtained quickly and without any contact, it has recently been intensively studied in a wide range of fields, including industry, medicine and security. Three-dimensional image measurement technologies can be broadly classified into passive techniques, such as stereovision and active techniques, such as patterned light projection. Among these, the method of projecting optimum intensity modulated light patterns for three-dimensional image measurement can obtain three-dimensional information on the measured object with a single projection, so it is expected to be highly applicable in practice. Measurement can be performed using a single observation image when the object to be measured has simple colouration or surface reflectivity, but for complex objects, eliminating the influence of colour and surface reflectivity requires a reference image to correct the intensity of the observed pattern. To address this, we propose an analysis method and image correction technology, using a novel colour system for realizing three-dimensional measurements using only one observation image.
Macroblock Importance Based Method for Stereo Video Congestion Control
Authors: Wang Xiaodong , Yao Ting , Li Shaobo , Zhang Lianjun , Wang Chaolin
Published: May 2018

Transporting a stereo video stream over an unreliable channel can degrade severely the video quality. Network congestion is one of the important factors affecting the video quality. To improve the stereo video quality, a stereo video congestion control method, based on the macroblock importance, is proposed. Firstly, the importance of every macroblock is calculated according to its influence on the current frame and future frames. Then, combined with the importance information, all macroblocks of a frame are divided into three levels. Finally, the packets are transported with the help of RTP/RTCP protocol. We discard some not so important packets actively according to the importance levels when a congestion occurs. The results from NS2 simulation platform show that the stereo video quality is improved with the method proposed.
Distributed Consistency Method and Two-Phase Locking in Cloud Storage over Multiple Data Centers
Authors: Lin Fan , Xiahou Jianbin , Huang Qihua
Published: May 2018

In replication management under multi-datacenter cloud storage environments, the problem of a replica being inconsistent across multiple datacenters must be solved. Focusing on data management strategies under multiple datacenters, this paper presents a design of a HDFS-based two Cascading Master-Slave Storage System (2CMSSS), which simplifies the research work of the replication management strategies under multi-datacenter cloud storage environments. On this basis a two-phase locking maintenance strategy for replica consistency is presented to validate and fix the problem of replica inconsistency across multiple datacenters. According to the experiment simulation, this strategy can ensure strong data consistency and maintain low latency for users to access data.
The Role of Geotechnical Monitoring at Design of Foundation Structures and their Verification – Part 1
Authors: Drusa Marián , Vlček Jozef , Orininová Lucia
Published: May 2018

For a long time, design of the square foundations has not posed a problem in engineering practice. Foundations are designed on the basis of determining the bearing capacity of the subsoil, where irregularities in its determination oftentimes affect the efficiency (economy), while possible failures of bearing resistance of foundation soil are rare. More important factor is the resulting deformation of second limit state under consideration - settlement, relative settlement, tilting and excessive deformation. The current pressure on the cost reduction of design preparation and obtaining important data from geotechnical survey often results in many cases into adverse effects of settlement and differential settlement of foundations of the buildings. The question lies in a variety of analytical methods for assessing the service ability of limit states used in European countries as well as the underestimation of the proposal risks. Authors of the article want to document the fact that the most important influence on adequate and safe design is the most accurate determination of geotechnical parameters and the appropriate selection of the calculation method. For the purposes of explanation, Monte Carlo simulation technique was used to test a variety of geotechnical parameters, which will be presented in second part of article. If all construction processes are carried out successfully, rarely are the buildings evaluated once again. However, when the opportunity to participate in the stage of engineering survey and collection of geotechnical parameters as well as the control of the construction process by tools of geotechnical monitoring presents itself, it is valuable to perform the analysis of the entire process for pointing out hidden risks.
3D Modelling, Animation and Simulation of Mammal’s Migration Across Roads
Authors: Talapka Jozef , Hlubík Ján , Kamencay Patrik , Hudec Róbert
Published: May 2018

The presented article is dealing with the new methods which are designated for data collection of mammals migrating across traffic networks. Nowadays, road construction and securing of older roads is usually accompanied by finding new solutions. Because of lack of collected data we have new opportunities how we can collect this input. The article below describes the most efficient method which is suitable for the model creation, process of creation and issues which are connected with the creation of simulations.
Meshless Solution of Incompressible Flow Over Backward-Facing Step
Authors: Mužík Juraj
Published: May 2018

Article presents the use of the meshless method for numerical simulation of incompressible fluid flow. The article presents the implementation of the meshless local Petrov-Galerkin method (MLPG), with Navier-Stokes equation formulated using the local weighted residual principle. The trial function construction process is the most important part of the meshless method implementation. In this article the radial basis functions (RBF) are used for the process of the trial functions construction.
Variability of Surface Reflection Amplitudes of GPR Horn Antenna Depending on Distance between Antenna and Surface
Authors: Komačka Jozef , Porubiaková Andrea
Published: May 2018

The study focused on variability of surface reflections amplitudes of GPR horn antenna in relation to distance between an antenna and a surface is presented in the paper. The air-coupled antenna with the central frequency of 1 GHz was used in the investigation. Four types of surfaces (dry pavement, wet pavement, metal plate and composite layer from gypsum and wood) were tested. The distance of antenna above the surfaces was changed in the range from 37.5 cm to 53.5 cm. The amplitudes of negative and positive peaks and their variability were analysed in relation to the distance of antenna above the surfaces. Moreover, the influence of changes in the peaks of negative and positive amplitudes on the total amplitudes was assessed. It was found out the amplitudes of negative peaks for all investigated surfaces were relatively consistent in the range from 40.5 cm to 48.5 cm and the moderate decline was identified in the case of amplitudes of positive peaks in the range of distances from 37.5 cm to 51.5 cm. This decline influences the tendency of total amplitudes. Based on the results of analysis it can be stated the distance of air-coupled antenna above the surface can influence the value of total amplitude and the differences depend on the type of surface.
The Impact of Potassium Manganate (VII) on the Effectiveness of Coagulation in the Removal of Iron and Manganese from Groundwater with an Increased Content of Organic Substances
Authors: Krupińska Izabela
Published: May 2018

The article presents the results of studies concerning the impact of the method of Fe(II) ion oxidisation (dissolved oxygen and potassium manganate (VII)) on the effectiveness of coagulation in the removal of iron and manganese from groundwater with an increased content of organic substances. The efficiencies of two coagulants were compared: aluminium sulphate (VI) and polyaluminium chloride (Flokor 1.2A). Among the used methods of iron (II) oxidisation, the best effects have been achieved by potassium manganate (VII) because one of the oxidation products was manganese oxide (IV) precipitating from water. Better results in purifying the water were obtained with the use of a prehydrolysed coagulant Flokor 1.2 A than aluminium sulphate (VI).