bluuebunny/crossref_metadata_2025 huggingface dataset:
A review on Data Mining & Big Data Analytics
Authors: Tummala Yashasree , Kalluri Dr. Hemantha Kumar
Published: April 2019

The time of enormous information is presently progressing. Be that as it may, the customary information investigation will most likely be unable to wrench such huge amounts of information. The inquiry that emerges now is, the way to build up an elite stage to effectively examine huge information and how to plan a suitable mining calculation to locate the helpful things from enormous information. To profoundly talk about this issue, this paper starts with a concise prologue to information investigation, trailed by the exchanges of enormous information examination.
Optimal Placement of DG for Optimal Reactive Power Dispatch Using PSO Algorithm
Authors: O Dsnmra , Kumar Dr.Niranjan
Published: April 2019

In the safety and economic point of view, Reactive Power is the most problematic thing during the operation of the electrical network. Reactive Power supply completion has nonlinear, equality and inequality constraints. Proposed work is carried out, to find the solution for reactive power supply issue, Particle Swarm Optimization (PSO) process as well as MATPOWER 5.1 implement package are developed in this process. PSO is an excellent optimization technique that is also having effective finding ability. One of the best assets of PSO is that its capacity is fewer sensitive than complication of the independent function. MAT POWER 5.1 is an undeveloped basis MATLAB implement package, concentrating the power flow issues findings. Suggested technique diminishes active power damage in the conventional power system and decides the optimum location of a newly setup Distributed Generator (DG). The IEEE 14bus arrangement is utilized to find the performance and test outcomes shown the perfectness of the recommended method.
Tactile Sensor for Manipulation of Deformable Object
Authors: A.Ayub Muhammad. , A.Jaafar Rabiatul. , Abdul Latif Amir , . .
Published: April 2019

The variable physical property of deformable objects, which are very flexible, soft and viscoelastic, causes the design of reliable automated handling system relatively difficult. In fact, most of these objects tend to be handled manually during the handling process. Therefore, a new optical tactile sensor for an intelligent handling of the non-rigid materials is presented in this paper. Mathematical modelling and control algorithm are developed and the tactile sensor is calibrated in this research. Based on the results that have been recorded, the surface characterization with the respect to normal force applied to the object is attained. A gripper handling system is used to accommodate variable physical properties of the deformable materials, which are very flexible, soft and viscoelastic. In addition to that, the gripper needs to handle the materials with the minimum deformation so that less distortion, and higher accuracy of manipulation can be achieved. Efficient and accurate modelling of deformations is crucial for grasping analysis.
Wake Modifications in Confined Flows Due to the Presence of a Downstream Cylinder in Staggered Arrangement
Authors: H. A Hamid Ahmad , H. Jamaludin Mohd , H. M. Noh Mohd , A. M. Sapardi Mohd
Published: April 2019

In the present study, confined flows around two square cylinders in staggered arrangement were numerically investigated. Cross-flow and streamwise center-to-center spacings of one- and three-cylinder diameters, respectively, were considered. Simulations were carried out at Reynolds numbers Re = 50,100,150 and 180, where the resulting wakes are laminar and periodic. Results indicate that the presence of the downstream cylinder tends to reduce the Strouhal number, amplitude and the time-averaged lift coefficient of the upstream cylinder relative to the single cylinder cases. Furthermore, the time variations of upstream cylinder’s lift coefficient behave similar to that of a single cylinder.
Hand Dominance Effect During right (Accelerator) Throttle Gripping in Riding Simulation
Authors: Nasir Nursalbiah , Hakimi Azmi Asyraf , Rashid Helmi
Published: April 2019

This study investigated the difference in muscle activation of the muscles in right handed (RH) and left handed (LH) participants during riding of motorcycle simulator. Five participants (3 RH and 2 LH) with average age of 24.2±0.447 years old were recruited and they were requested to ride the simulator for certain period of times for three days. Two surface electromyogram (sEMG) electrodes were attached to right flexor carpi radialis (RFCR) and left flexor carpi radialis (LFCR) of the participants forearm. Electromyography (EMG) of flexor carpi radialis (FCR) are measured at both hands during the task. The results showed that muscle activation during first 5 minutes of riding task in day 1 of experiment (percentage of maximum voluntary contraction, %MVC) for RFCR in LH (non-dominant) participants was 97.4% and 87.7% in RH (dominant) participants. Therefore, this result indicates that non-dominant person needs to activate more muscle than RH person during control the accelerator throttle while riding.
The Effect of Palm Oil Fly Ash Reinforcement on Recycle Aluminium via Sand Casting
Authors: Hafiz Mohd Noh Mohd , Ismail Azzura , Hussein Abdul Hamid Ahmad
Published: April 2019

Recycle aluminium has been mixed with palm oil fly ash based on fraction weight of overall weight of palm oil fly ashes to aluminium recycle. The ratios discussed on this paper are 0%, 3% 6%, 9%, 12% and 15%. The samples have been developed via sand casting method. The result shows that the best composition has been achieved when we added 3% of palm oil fly ashes, with the new composite aluminum have a highest hardness with the value of 119.7HV, with the Modulus of raptured of 7.71Mkg/m2
A Review of Stratigraphic Foward Models (Sfm) for Carbonate Platform
Authors: Rosli Redwan , Poppelreiter Michael C. , Jamaludin Siti Nur Fathiyah
Published: April 2019

Stratigraphic forward modelling (SFM) is a numerical method that simulates the key factors that control depositional processes. A few models have been developed over years for different geological environment (fluvial, turbidite and carbonate). The model for carbonate system is particularly more complex compared to others. This is due to fact that carbonate system is controlled by the interplay between carbonate productivity, eustasy, subsidence/uplift. Carbonate platform’s morphology also strongly influenced by hydrodynamic factors (Wind and Waves). SFM has been used to test the hypothesis on factors that controlled the evolution of carbonate platforms. This technique also a reliable tool for hydrocarbon exploration and development. SFM has been used to predict carbonate facies distribution, petrophysical properties, and architecture of carbonate platforms. In this review paper, four SFMs namely CARB3D+, GPM CARBONATE, DIONISOS, SEDPAK are discussed.
Design of Algorithm for Identification of Locomotive Electrical Machine Unit During Repair
Authors: Puzyr Volodymyr , Datsun Yurii , Obozny Oleksandr
Published: April 2019

The purpose of this article is the design of an algorithm for identification of locomotive electrical machine unit by robotic cleaning facility during repair. The recognition and identification of objects is affected by several random factors and is the probabilistic process. the Johnson criterion was used as the criterion that allows making decision on fulfilment of the identification task with the specified degree of reliability. The diameter of locomotive fuel and oil pump motor fittings was adopted as the critical minimal dimension of the object to be identified. It was calculated that for identification of locomotive electrical machine unit the digital image should have dimensions of 80х80 pixels. The identification of 80х80 two-dimensional vector requires larger memory space and longer system learning time. The decrease of input data amount is possible by image additional processing. In order to decrease the unit identification system input data amount the algorithm foreseeing input vector of values generation using summarization of pixel binary codes over lines was developed. The unit identification system was built on the basis of the multilayer perceptron and was modeled in Neural Network Toolbox MATLAB package. The best learning error magnitude result was shown by the network with 40 hidden layers.
Principles of the Feedback Action in Local Elements of Rail Yard Interaction
Authors: Yanovsky Petro , Yanovska Victoriia , Lytvynenko Sergiy , Nesterenko Halyna , Lytvynenko Larysa
Published: April 2019

Achievement of high-quality servicing level of cargo owners should be carried out under unconditionally effective use of rolling stock of railways and technical means. The real transport process should be implemented based on logistic cargo supply chains by types of connections for each shipment. The practice of railway operation shows that there is a significant shortage of train locomotives as a result of which the departure of ready trains at rail yard is often not carried out. In such cases, a feedback effect in local elements of interaction of these stations occurs. Due to delay in departure of trains, sending of already formed trains from rail yards is delayed; furthermore, because of the overflow of rail yard tracks, the sorting process on marshalling humps can be slowed down and delay of prepared trains for dismantling at arrival yard may occur. As a result of feedback action, downtimes of rail cars are increasing and movement of inventories is slowing down. In order to mitigate feedbacks effects in local elements of interaction, the principles of their operation, consideration of which will enable acceleration in passage of the rail car and cargo traffic through the railway network in practical activity, were formulated.
Rationalization of the Use of Alternative Rolling Stock for Transportation of Vegetable Cargo with Insufficient Number of Grain Hoppers
Authors: Lavrukhin O , Zapara V , Baulina H , Zapara Y , Kyman A
Published: April 2019

The main problems of transportation of vegetable cargo by the Ukraine railway transport are considered. It was established that as grain export grows rapidly and subject to the current technical condition of the railway, the number of special rolling stock â€“ grain hoppers â€“ is insufficient. The article proposes using an alternative rolling stock â€“ a covered car. The use of metal door panels in the car has been proposed to ensure the car loading without restrictions on the height of loading in the doorway space and the complete safety of the cargo with the increased use of the load capacity of covered cars. The influence of loading density of the loaded cargo on the degree of use of loading capacity and loading volume of the car was investigated when standard wooden door panels are used vs. proposed metal door panels. The study have proved significant economy of the covered car fleet during transportation of vegetable cargo with the use of metal door panels in the loading density range of the cargo from a minimum to 610 kg/m3.Â Â
A Method of Experimental Studies of Heat Transfer Processes between Adjacent Facilities
Authors: Nizhnyk Vadym , Shchipets Stanislav , Tarasenko Olexandr , Kropyvnytskyi Vitalii , Medvid Bogdan
Published: April 2019

A method of experimental studies of heat transfer processes between adjacent facilities during fire was developed. Equipment necessary for the experimental studies was determined. A new specimen type for studies was created in order to perform experimental studies. Configuration of the specimen for the studies allows simulation of a building fragment with filler structures which is affected by heat radiation emitted by fire. Points of placement of the specimens for studies relative to the heat flux source when conducting experimental studies were substantiated. It was revealed that height of the specimen installation shall be determined so that the test specimen is located below the flame tip in order to take into account the most severe impact of heat radiation coming from the fire bed and to exclude any possibility of irradiation from the ground surface. It was proposed that the test specimens are placed at the level of the lower edge of the window opening of the building fragment at the distances of2 m,4 mand6 mfrom the building fragment. The sequence of conduction of experimental studies of heat transfer processes between adjacent facilities during fire was developed.Â
Formulation of the Problem of Maximum Clique Determination in Non-Oriented Graphs
Authors: V. Listrovoy S. , V. Golovko O. , M. Butenko V. , V. Ushakov M. , . .
Published: April 2019

In the train traffic organization, large amount of information should be processed in real time. Thereby in complicated dispatching systems, rational use of resources is needed. To perform this work a model of a management system is constructed and it is represented as a sparse graph. Further optimization of the model requires solving the Maximum Clique Problem (MCP) for the less time than the exponential time. This article contains two procedures for solving the task for subexponential time. Procedure B accurately estimates the size of the maximum clique in the graph and performs the sorting of the vertices, in such a way that the vertices that are not exactly in the maximum clique can be rejected. Procedure A, in fact, finds cliques of the maximum size in a given graph, using the procedure B. The main advantage of this method is that using it is expedient in real time for sufficiently large graphs, which in turn is important for the construction of control systems.Â Â
Carrying Out Energy Audits to Determine Measures to Save Energy Resources
Authors: Vasilenko O. , Shkrehal O. , Kletska O. , Onyshchenko A. , Voznenko S.
Published: April 2019

It is important for a modern consumer of thermal energy to know and be able to reduce the consumption of thermal energy, for which purpose an energy audit should be conducted. Today, three types of energy audit of residential buildings are used in Ukraine. The first one is development of the energy performance certificate of the building. The obtained energy performance certificate will give an idea of the level of thermal losses of the building and identify the main areas where measures to reduce the consumption of energy resources should be taken. The second method involves carrying out experimental studies to determine the class of air permeability of enclosing structures, which also makes it possible to assess the level of heat losses of the building and the condition of the ventilation system of the building. The third type of energy audit involves carrying out thermal imaging of the building envelope for the subsequent analysis of infrared images. A methodological approach has been developed for processing multiple infrared images. An energy inspection of a residential house has been conducted on the basis of which an energy performance certificate was compiled. The premises of the residential building have been tested for air permeability. Considering the main types of energy audit, its advantages and disadvantages have been determined both for the consumer and for the employees who conduct the audit.Â Â
Energy Efficiency of Binder Application in Concrete
Authors: Vinnichenko Varvara , Ryazanov Alexander
Published: April 2019

Theoretical calculation of the thermal effect of formation of minerals of binders is carried out. The dependence allowing calculating the thermal effect of formation of minerals of lime, gypsum, slag cement, portland cement, dolomite cement is presented. The formula also takes into account the effect of organic components in the mixture. A comparative analysis of the energy efficiency of different types of binder in concrete is carried out. It is shown that the use of slag cement in the production of concrete mix is twice as effective as portland cement. This is due to the presence in the slag of calcium oxide, which does not need energy to carry out the endothermic decarbonization reaction. Lime in the concrete composition has a rate of energy consumption is five times greater. This means, industrial waste which contains calcium oxide (slag, ash and others) can replace natural materials with high efficiency.Â Â
Institutional Support of the Renewable Energy Industry in Ukraine
Authors: Nataliia Riazanova , . .
Published: April 2019

The article considers the institutional aspect of the renewable power industry development in Ukraine as a complex of formal and informal institutions, certain rules that actively influence the development and implementation of technologies. The development of the renewable energy industry through institutional transformations should be at the highest hierarchical level. The factors hindering the development of renewable energy sources (RES) are highlighted and systematized. In order to eliminate these factors, significant institutional changes that can not be carried out outside targeted state policies are needed, including financial support for the industry, the elimination of regulatory barriers, and the formation of demand for equipment by the strengthening of environmental norms and other tools for stimulating the development of renewable energy power industry and coordination of energy market participants. Key segments that influence the development of RES are formulated. Certain institutional transformations are needed for qualitative development of renewable energy power industry in Ukraine. Necessary institutional changes in energy supply, and now the state needs to systematize and harmonize the RES-policy. Institutional transformations are reduced to the problems of the development of renewable energy power industry in Ukraine, the ways of their solution are determined. The actions of economic entities in the economic space with the distribution (regulation) of each of them for the stable functioning of the system, which are the basis of the institutional relationship of renewable energy sources in Ukraine for the purpose of energy saving, are presented.Â Â
Increasing the Traction Properties of Locomotives for the Account of Improvement of Body and Bogies Connexions
Authors: Gerlici Juraj , Kravchenko Kateryna , Gorbunov Mykola , Lack Tomas
Published: April 2019

The article presents the results of a research of the reserves for the realization of tractive and braking forces of a rail vehicle. Two target functions have been developed that show the evaluation of the design and identify opportunities to increase the efficiency of using the locomotive. On the basis of the objective functions, technical solutions have been proposed and patented in the crew part of the locomotive. The analysis of the factors that affect the traction and coupling qualities of the locomotive was carried out. A mathematical modeling of the starting from the place of the shunting locomotive TEM103 was carried out. The redistribution of loads from wheel pairs to rails is shown depending on the speed. The change in the wheel-rail contact area when the load of the shunting locomotive TEM103 changes is estimated. The work of the proposed finish loading device in different modes of operation is described. Efficiency of work is shown.Â Â
Specifics of Participation of Industrial Companies of the Railway Transport in Ukraine in Functioning of Innovation-Oriented Industrial Logistic Clusters
Authors: Dikan Olena , Polyakova Olena , Ustenko Marina , Shramenko Olena , Rekun Anna
Published: April 2019

The article reveals the specifics of participation of industrial companies of the railway transport of Ukraine in the process of functioning of innovation-oriented industrial logistic clusters. The interpretation of the concept of a cluster and definition of its main components has been studied. The problems and prospects of development of industrial companies of railway transport of Ukraine have been studied. It has been determined that the new model of economic development of industrial companies of the railway industry should be based on interaction of all the participants involved at all stages of the life cycle of creating innovative products by forming innovation-oriented industrial-logistic clusters. It has been noted that innovation engineering centers that initiate and develop innovations and coordinate the entire innovative process of product creation are the core of innovation-oriented industrial logistic clusters.The main problems that hinder the use of the cluster approach in management of regional systems in Ukraine have been revealed and active participation of the state in creation of conditions for development of innovations, cooperation of the state, science and business and creation of the national innovation infrastructure has been justified.Â Â
The Strategic Framework of Cost Management for Production Competitiveness: World Experience
Authors: Dubovaya Valentina , Komelina Anna , Hassan Ismail Shamila
Published: April 2019

Purpose of the article is to analyze the concept of production competitiveness and develop framework of cost management. A variety of cost management techniques requires the identification of their relationship with the requirements of operations management. Identified seven key concepts of operations management, analyzed their essence, information requirements. Systematized cost management techniques accordance with modern concepts of operations management such as: standart-costing, break-even analysis, direct-costing, life-cycle costing, target costing, value analysis, functional analysis, activity-based costing, sensitivity analysis, JIT-costing, kaizen costing, activity-based cost management, value-chain analysis. The aim of the article is the establishment relevance of costing methods with the key concepts of operations management companies.Â Â
Development of the Viable System Model of Partner Relationship Management of the Company
Authors: Fedotova Iryna , Shynkarenko Volodymyr , Kryvoruchko Oksana
Published: April 2019

This paper considers the main instruments for relationship management between the company and different partners. The purpose of the study is to improve the theoretical foundations of the development of a system of total relationship management of the company with the main groups of interaction actors, taking into account relationships with all groups of partners of the company. The model of the relationship management system of the company on the basis of methodical apparatus of cybernetic modeling of viable systems is proposed. The model of the relationship management system of the company is presented as an entity (a metasystem) and an object of management (operating element), which is proposed in the form of relationship management processes with main groups of partners. The system of inter-company interactions, which reflects the development of individual relationship with a certain partner, is presented. Based on the structural-level and metasystem approaches, key levels and structure of enterprise relationships are identified. Five levels of relationship between the company and its partners â€“ element, component, subsystem, system-wide, and metasystem levels are identified. These levels are presented in the form of recursive structure of the viable model of relationship management system of the enterprise.Â Â
Modern (Financial and Innovative) Formation Determinants of Enterprise Logistics Management Under the Influence of Global Challenges
Authors: Komelina Olha , Komelina Anna , Galinska Tatyana , Ashyru Ismayli Kashasira
Published: April 2019

A methodological approach is developed in the construction of enterprise logistics management and its business processes. It is substantiated that under current conditions the effectiveness of the formation of the enterprise's logistics system of determines the influence of innovative and financial determinants. The expediency of taking into account the influence of the risks group on the development of the enterprise and its logistical system, which arise in conditions of increasing global challenges and accompanied by changes in the national environment, is substantiated. The content of innovative financial management that takes into account the peculiarities of the logistics system of the enterprise, provides for the optimal way of financial flows, is based on the concept of the value chain, allows to model the chain of activity of the enterprise and manage it for the purpose of supplying a product or service to the market.Â Â
Quality Management of Transport Services: Concept, System Approach, Models of Implementation
Authors: Ðšryvoruchko Oksana , Shynkarenko Vladimir , Popova Nadezhda
Published: April 2019

The article proposes a conceptual approach to transport services quality management. It is based on the principles of logistical management, management of relationships with consumers, harmonization of the enterprise management system based on the quality and the use of principles of a synergetic systemic approach. The synergetic systemic approach presupposes the formation of a self-organizing quality management system for transport services (cybernetic adaptive, in which the accumulation of experience, the memorization and structuring of information is expressed in a change in the structure of the system and the level of its organization). The scientific novelty of the proposed approach to transport services quality management consists in the integration of the principles of the TQM concept and logistics, the application of a variable approach to selecting technologies for improving the processes of transport and logistics services; comparison of consumer assessment of motor transport services with an evaluation of the quality of processes of its formation. The proposed methodological approach to evaluation takes into account the influence of integrated processes on the final result formation, as well as the effectiveness of each process execution. The implementation of this approach will provide a reasonable choice of methods for providing and improving the quality of transport services, the effectiveness of creating/improving the management system.Â Â
Ensuring Development of the Production Potential in Terms of Implementation of Strategic Initiatives of the Railway Transport
Authors: Ovchynnikova Viktoria , Tolstova Anna , Obruch Hanna , Ostroverkh Hanna
Published: April 2019

The article determines importance of forming production strategy for railway transport that takes place under the influence of internal and external factors. It has been established that the most significant influence is caused by internal factors, which are caused, first of all, by the specific features of the main activity of the railway transport, transformational conditions of operation, in particular processes of reforming in the railway industry, and existing state of the production potential. It has been determined that formation of the production strategy of the railway transport is to ensure effective use and development of its own production potential.Based on the use of a combined approach that stipulates combination of resource, process and reserve components of the production potential, and states the goals and results of operation, the authors provide their understanding of the essence of the production potential of railway transport as ability and capabilities of the available resources and business processes to ensure the main business activities of the railway transport companies to achieve their planned results and established goals in terms of operation of the railway industry.Â
Application of the Sequential Control for Increasing Competitiveness of Agricultural Products
Authors: Puzik Vladimir , Puzik Ludmila , Lyubymova Nina , Pankova Oksana , Sakhatsky Vitalyi
Published: April 2019

The competitiveness of agricultural enterprises on the international market depends directly on the professional and timely implementation of decisions of control. Its function stipulates for a number of actions, work out methods and tools which aimed at conservation the quality of agricultural products in the period of its storage and transportation in accordance with the consumerâ€™s requirements.Construction of control by a recycling pattern is one of the practical ways to increase the effectiveness of control, when an object that is recognized as fit is subject to repeated checks. The major tasks in the construction of a statistical model of measurement control have been analyzed, a typical monitoring system, a sequential control structure, and its characteristics have been submitted. The suggested control significantly reduces the reject rate in the total mass of products.The obtained result of analytical dependencies is convenient for engineering calculations of other types of numerical control.An example of the application of sequential control of broccoli cabbage in its storage with helping with antiseptic preparations is given. The influence of various antiseptics on different varieties of broccoli cabbage is considered. Such a study helps the manufacturer find the best opportunities to improve the competitiveness of its products.Â Â
Innovation as a Factor of the Development of Territorial Communities
Authors: V. Varuk V , O. Kramarenko A , A. LunovÐ° V , S. Parkhomenko O
Published: April 2019

The purpose of the paper is to substantiate the need for the introduction of innovations in the activities of business entities and territorial communities. Analyzing, systematizing and generalizing the scientific work of many researchers, it was discovered that innovation is one of the factors of successful decentralization. As a result of the study, the essence of the concept of innovation is shown, which can be considered as the introduction of something "new and improved" or activity that requires a person or community to do something different than before. Elements of innovation capacity are singled out. The peculiarities of investment activity formation in Ukraine are outlined. The basic principles and functions of management of effective work in the field of innovations are determined. The factors of implementation of innovations in the branches, organizations and territorial communities are presented.Â
Benchmarking of the Transport Market with Hierarchical Clustering of Rail Companies
Authors: I.Zorina O , V.Neskuba T , M.Mkrtychyan O , A.Volokhov V
Published: April 2019

The article deals with the hierarchical clustering of operating rail national companies as the main stage of the benchmarking of Europeâ€™s rail transport market, which was proposed for the first time. It was established that at Euro integration the results of taxonomy make it possible to determine efficient areas of cooperation and provide a sufficient competitive level in the rail industry both for European counties and Ukraine. And an optimal criterion for cluster analysis, as was established, is the efficiency indices. Hence, the basic result in hierarchical clustering is division of rail companies into groups with similar performance characteristics. It will allow revealing the main competitors in the industry for each company on the basis of technical, geographic and economic conditions in a particular country. Detailed research of clusters with the k-means method made it possible to obtain more detailed information on characteristics of division and influence of factors on clusters. For accurate identification of characteristics for each cluster a single-factor dispersion analysis was performed. The analysis established the average value of an indicator for the clusters, standard deflection, maximal and minimal values. This information is required for development of the priority areas to improve the operating efficiency and ensure a sufficient competitive level in the rail industry of the EU countries.Â Â
The Financial Aspects of Innovative Development of the Railway Transport in Ukraine
Authors: Kravchenko Olha , . .
Published: April 2019

The implementation of the strategy of re-industrialization of national economies is now the main trend in both Europe and Asia. In this context, railways are of great importance, as a mode of transport, capable of carrying large volumes of cargo and passengers with a sufficiently high speed. Special attention is paid to the innovative development of transport corridors connecting Europe and Asia to a single transport network. Mainly this paper is devoted to the financial aspects of the development of Ukrainian railway infrastructure, which has a significant transit potential. It is shown that underfunding of renewal of fixed assets of railways leads not only to the intensification of current problems, but to the formation of problems that will have a decisive influence in the future. The high cost of projects related to the innovative development of the railway infrastructure necessitates the attraction of private capital. The types of public-private partnership models as a mechanism for investment financing are considered. It has been determined that for the railway transport the most feasible are the BOT (build-operate-transfer) and BOOT (builtâ€“ownâ€“operateâ€“transfer) models, which allow to ensure the innovative development of strategic infrastructure sites and maintain its integrity, by keeping it in state ownership.Â Â
Financial and Economic Stability of Railway Sector in the Context of Globalization and Integration
Authors: Steshenko Olena , Masalygina Viktoriia , Salenko Olena
Published: April 2019

This paper is dedicated to the study of financial and economic security of the railway sector in the context of globalization and integration through the example of PJSC Ukrzaliznytsia. The study covers theoretical and methodological approaches to identification of criterion for assessment of financial and economic security of the railway sector.It provides the proof of the increasing competition, diversity of internal and external risks and uncertainty in conditions of contemporary integration processes. The paper offers the cause-and-effect analysis through the â€œTree of Problemsâ€. Key indicators of financial and economic security of the railway enterprises are singled out of the overall system of threats (risks). Each indicator is assessed for impact on the overall value of the Pareto-efficient integral risk and the equation for calculation of the integrated risk value is formulated.Findings of the study confirm that monitoring of the existing and potential threats determines the operating and prognostic goals of functioning of the financial and economic security, which allows to formulate the relevant mechanisms and tools for the attainment thereof.Â Â
Organization of Financial Reporting in Accordance with Requirements of the IFRS Taxonomy
Authors: V. Сhebanova N. , I. Yefimenko T. , M.  Orlova V. , N. Korolova N.
Published: April 2019

The authors of the article exposed the methodical questions of introduction, new for the registration process of Ukraine of the phenomenon. It is taxonomy of the financial reporting (ТFR). At the same time continued consideration of questions of the use of the financial reporting for the acceptance of administrative decisions.Essence of ТFR is exposed in the context of classification and systematization of ingredients of the financial reporting. It in itself informative system and connections between the constituents of such system. Authors suggested to attribute ТFR to the mathematical determined models. The construction of such models  requires the clear plan of actions in three steps: a mathematical model - an algorithm of calculation - computer program. The purpose of researches: of one times  to prove that introducing in economic science of exact knowledge, enables to limit the intuitional acceptance of administrative decisions and extend the limits of application of rational methods. It will be realized on condition of the use of different methods, methods and approaches - from nonlinear, stochastic models to the modern  programming languages .
Application FCM in Modelling DIR for Selangor Using Negative Binomial GAM
Authors: Mohamad Nazeera , Him Norziha Che , Rusiman Mohd Saifullah , Sufahani Suliadi , Jamil Siti Afiqah Muhammad
Published: April 2019

This study attempts to obtain the best fitted model among two clusters which describe the relationship between dengue incidence rate (DIR) and relevant covariates such as climatic and non-climatic variables. The significant variables include amount of rainfall and number of rainy days with lag 0 until 3 months, number of locality and population density. Fuzzy C-Means clustering (FCM) was applied in clustering DIR data based on the value of membership function. The boundary of membership function has been set as 0.5. There are two clusters identified in this study with Cluster 1 consist of 569 data and Cluster 2 consist of 43 data. Then, this study developed models to predict future dengue incidences in Selangor by using negative binomial Generalised Additive Model (GAM). The result shows that the model able to be one of tools for future development in controlling and reducing the number of dengue cases particularly in Selangor, Malaysia as well as other states.
Design of Mathematics Student Worksheet based on Realistic Mathematics Education Approach to Improving the Mathematical Communication Ability Students of Class VII Junior High School in Indonesia
Authors: Handayani Ruri , Man Supar
Published: April 2019

Mathematics communication is a way of sharing ideas and clarifying comprehension. The Realistic Mathematics Education (RME) approach can improve mathematical communication skills. The student worksheet is used because it is shorter, more comfortable and summarizes the material along with the questions to be able to assist students in the ability of mathematics communication. This study aims to develop teaching materials in the form of student worksheets based on Realistic Mathematics Education Approach to improve students' mathematical communication skills. This research is development research with ADDIE development model, that is analysis, design, develop, evaluation implementation. The subject of this research is the students of the first grade of VII. Instruments used in the form of validation sheet, mathematics communication ability test, and interview guidance manual. The validation sheet is addressed to material experts and media experts. The test to determine students 'mathematical communication skills is done before and after the use of student worksheet so that it is known whether there is an increase in students' mathematical communication ability. Interview guides are conducted with teachers and students to find out the curricula and character of students in the school. Data analysis techniques in this study using data reduction, presentation, and conclusion. The resulting student worksheet design based on the RME approach that matches the characteristics, curriculum, and student tasks. This research can be developed to the stage of development, implementation, and evaluation.
Effect on Silicon Nitride thin Films Properties at Various Powers of RF Magnetron Sputtering
Authors: Mustafa M K , Majeed U , Iqbal Y
Published: April 2019

Silicon nitride thin films have numerous applications in microelectronics and optoelectronics fields due to their unique properties. In this work, silicon nitride thin films were produced using radio frequency (R.F.) magnetron sputtering technique at various sputtering powers. The prepared thin films were characterized with XRD, FE-SEM, FTIR, surface profiler, AFM and spectral reflectance techniques for structure, surface morphology, chemical bonding information, growth rate, surface roughness and optical properties. The results showed that silicon nitride thin films were amorphous in nature. The films were smooth and densely packed with no voids or cracks at the surface. FTIR characterization informed about Si-N bonding existence which confirmed the formation of silicon nitride films. The sputtering power showed the impetus effect on growth rate, surface roughness and optical properties of produced films.
Development of Students Worksheet based on Realistic Mathematics Education in Indonesia
Authors: Maulana Monif , Man Supar
Published: April 2019

A concept of mathematics is one of the essential goals in learning mathematics. Providing an understanding that the material taught to students is not only as a recitation but also as the concept of the subject matter itself. This study aims to develop student worksheet based on realistic mathematical approach. The method used in this study is the stages of 4-D development research which consists of defining, designing, developing, and disseminating. This study employed two data collection instruments. The first is expert validation which was used to measure the validity. Meanwhile the second is questionnaire which was used to measure studentsâ€™ practicality and to get product development assessment from experts and students. The results showed that the developed worksheet is valid with the validity level of 3.67 for the content aspect, 3.60 for the constructed aspect, and 3.50 for the language aspect. The worksheet was tested to 21 students of grade VII in MTs N 2 Gunungkidul Indonesia. The test results stated that the worksheet received a good response from students. Therefore, it can be used in the process of learning mathematics in class.
Empirical Investigation on Breakdown Characteristics of Air â€“ CO2 Gas Mixtures Under AC and DC Voltages
Authors: Azizol N. , Kamarudin M. S. , Yousof M. F. M. , Jamail N. A. M. , Rahman R. Abd. , Othman N. A. , Baharom M. N. R. , Wari J. M.
Published: April 2019

For years there have been countless efforts to find an environmental-friendly gas or gas mixtures to minimize SF6. Researchers have been ongoing to find its alternatives where there are few gasses used to minimize SF6, such as carbon dioxide (CO2) and air. This paper aimed to study the effects of field uniformity towards breakdown characteristic of air-CO2 gas mixtures under AC and DC voltage. Two types of electrodes were used in this experiment which are sphere-sphere electrode (D=5cm) and the rod-rod electrode. Other than that, there are five level of gap distances (0.5cm-2.5cm) with three mixing ratios (100% airâ€“0% CO2, 70% airâ€“30% CO2, 50% air-50% CO2) in 2 bar (abs). The results show the breakdown voltage (U50) of the sphere-sphere electrode is higher than the rod-rod electrode under AC and DC voltage. Besides, as the U50 goes higher, the Emax will be decreasing in any mixing ratio under AC and DC voltage. As for the results, the sphere-sphere electrode is more uniform field than the rod-rod electrode. Moreover, the sphere-sphere electrode has shown the highest withstand capacity of breakdown since they have provided less stress to the field gaps.
Determination of Optimum Machining Condition for Surface Roughness Using Historical Data
Authors: Ruslan Mohd Shahfizal Mohd , Rahman Haniff Abdul , Ghani Jaharah Abdul , Haron Che Hassan Che , Kassim Mohd Shahir , Othman Kamal
Published: April 2019

Magnesium alloy is one of the lightest materials with a high strength to weight ratio and excellent machinability, which makes it attractive and suitable for various industrial applications such as automotive and aerospace components. For these particular industrial components, the end products require a mirror-like finish. This article details a statistical analysis about the effect of milling parameters on the surface roughness of Magnesium alloy AZ91D in the dry milling process. The historical data approach in the response surface methodology (RSM) was utilized to determine the cause and effect relationship between the input variables and output response. The effect of milling parameter studied was cutting speed (900 â€“ 1400 m/min), feed rate (0.03 - 0.09 mm/tooth), and radial depth of cut (0.2 - 0.3 mm). The results confirmed that the interaction between feed rate and cutting speed is the primary factor controlling the surface evolution. The responses of various factors were plotted using a two-dimensional interaction graph and the cubic empirical model was developed at 95% confidence level. The optimum condition for achieving the minimum surface roughness was a cutting speed of 977 m/min, a feed rate of 0.02 mm/tooth, and an axial depth of cut of 0.29 mm. With this optimum condition, a surface arithmetic roughness of 0.054 Î¼m is expected. This study confirmed that by milling AZ91D at high speed cutting, it is possible to eliminate the polishing process to achieve a super mirror-like finishing.
Comparative Study on Structural, Electrical Transport and Magnetic Properties of Cr-Doped in Charge-Ordered Pr0.75Na0.25Mn1-Xcrxo3 and Nd0.75Na0.25Mn1-Ycryo3 Manganites
Authors: Zawawi Rabiatul Adawiyah , Khairulzaman Nurul Nasuha , Shamsuddin Suhadir , Ibrahim Norazila
Published: April 2019

Cr doping in charge-ordered Pr0.75Na0.25Mn1-xCrxO3 and Nd0.75Na0.25Mn1-yCryO3 have been synthesized using conventional solid-state method to investigate its effect on structural, electrical transport and magnetic properties. X-ray diffraction (XRD) analysis for both compounds showed that the samples were crystallized in an orthorhombic structure with Pnma group. The unit cell volume valueÂ Â Â Â Â  decrease as the Cr-doped increased indicating the possibility of Mn3+ ion was replaced by Cr3+ due to the different of ionic radius. The temperature dependence of electrical resistivity showed an insulating behavior down to the lower temperature the both parent compound (x = 0 and y = 0). Successive substitution of Cr at Mn-site in Pr0.75Na0.25Mn1-xCrxO3 manganites induced the metal-insulator (MI) transition temperature around TMI~120 K and TMI~122 K for x = 0.02 and x = 0.04 samples respectively suggestively due to the enhancement of double-exchange (DE) mechanism as a result of suppress the CO state. Analysis of resistivity data of dlnÏ/dT-1 vs. T in Nd0.75Na0.25Mn1-yCryO3 manganite, showed a peak around 210 K and 160 K for y = 0 and 0.02 samples respectively while no peak was observed for y = 0.05 sample indicate the charge-ordered (CO) weakened. AC susceptibility, Ï‡â€™ measurements in Pr0.75Na0.25Mn1-xCrxO3 exhibits paramagnetic to ferromagnetic-like with curie temperature, TC increases from 132 K for x = 0.02 to 141 K for x = 0.04 with Cr content indicate the suppression of CO state meanwhile in Nd0.75Na0.25Mn1-yCryO3 showed paramagnetic to anti-ferromagnetic transition as Neel temperature TN increases from 115 K for y = 0.02 to 125 K for y = 0.05.
Preliminary Observations of Zooplankton in Pulau Tinggi, Marine Park, Johor, Malaysia
Authors: Shuaib Nasir , Mohammad Maryati , Peralta Hazel Monica Matias- , Rusiman Mohd Saifullah , Sanusi Shuaibu Babaji
Published: April 2019

Zooplankton was studied in Pulau Tinggi, Marine Park, Johor, Malaysia for their abundance and species diversity. Water samples were collected within three months, April, June and October 2015.Ten sampling stations were established during the study period. A total of 54 species of copepods from 29 genera and 22 families were identified. An average of 86.70 % copepods and 15.84% non-copepods were recorded among the zooplankton groups. The water quality parameters such as depth, dissolved oxygen, pH, temperature, turbidity, and salinity were measured in situ.Â  The present study was taken to observe the abundance and diversity of zooplankton in Pulau Tinggi, Johor. This research will be helpful for fisheries authorities and marine controlling departments. The effect of different physico-chemical parameters on the biomass and density of zooplankton will be discussed in the coming paper.