bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flexural Behavior of Steel Beam Strengthening by Prestressing Strands
Authors: Mohammed M. Rasheed Dr. , Ali F. Atshan Mr. , Kamal Sh. Mahmoud Mr. 
Published: April 2019

Seven simply supported steel beams were tested to explain the effect of strengthening by external prestressing strands. All of the beams have the same steel section, clear span length and the strengthening samples which implemented by two external prestressing strands. The tested beams are divided into two categories according to existing of external prestressing strands, the first category consists of one steel beam as a reference, while, the second group deals with steel beams strengthening by external prestressing strands and consists of six steel beams divided according to the eccentricity location of prestressing strand with jacking stress (815 MPa). From experimental results, it was found that the moment curvature curves behavior for the tested beams are stiffer and with less ductility than the reference beams and the ultimate moment capacity is increased with increasing the eccentricity location. While, the maximum radius of curvature at bottom flange decreases with increasing the eccentricity location as compare with the reference beam.Â Â Â
Evaluation of Separating Process for Different Materials by Thermal Stress Cleaving Technique
Authors: Mohd Saman Alias , Furumoto Tatsuaki , . . 
Published: April 2019

This paper aims to evaluate the separating process of brittle materials by thermal stress cleaving technique. This process is suitable for separating thin brittle materials such as sapphire and silicon wafer, which are sensitive to force. Both materials were used largely in microelectronics, solar cells and micro-mechanical industries that require precise machining. Finite element method was used to evaluate a steady state thermal stress by considering the temperature transient during laser irradiation process. The heat source was assigned according to the laser energy absorption characteristics of the materials. Stress intensity factor was analyzed to determine the starts of separation process. The results show that CO2 laser energy was absorbed on the surface of the sapphire material as compared proportionated absorption of Nd:YAG laser energy on silicon material. Due to thermal stress generated by the laser beam, material separation was start. Fracture begins at the bottom surface of sapphire wafer compared to fracture initiation at the prepared groove for silicon wafer. The material separation can be controlled when it begins at the groove. Hence, better surface finished can be achieved.
Identification of Axle-Box Bearing Faults of Freight Cars Based on Minimum Entropy Deconvolution and Squared Envelope Spectra
Authors: Mykhalkiv Serhii , Ravlyuk Vasyl , Khodakivskyi Andrii , Bereznyi Viktor 
Published: April 2019

Purpose: To improve the performance of vibration spectral methods in identification of bearing element faults of freight car axle-boxes.Approach: An algorithm for simulating the expected vibration signal of outer race bearing was implemented. The autoregressive filter and minimum empirical deconvolution method was applied to identify the ball pass outer-race fault frequency and its harmonics on the envelope spectra and squared envelope spectra which were extracted in the proper frequency band.Results: The simulated vibration signal of a faulty bearing shows suitability of the autoregressive filter and minimum empirical deconvolution method, envelope and squared envelope spectra for outer race fault identification. There were observed a lower amount of features and their impulse sharpness in outer race faults in the bearing test rig than on the spectra in the wheelset test rig.Conclusions: The deterministic components are removed in the residual signal after using the AR filter and the impulse and noise components that decrease the kurtosis value remain in it. The MED technique additionally enhances the magnitude of increased BPFO components after using the AR filter and, together with it, provides satisfied performance and increases the efficiency of vibration diagnostics.
Development of the Method of Formation of the Architecture of the Innovation Program in the System "Universityâ€“Stateâ€“Business"
Authors: Piterska Varvara , Rudenko Sergey , Shakhov Anatoliy 
Published: April 2019

We investigated the mechanisms of increase of efficiency of innovative activity on the basis of methodology of management of projects and programs of sustainable development on the basis of the GPM Global P5 standard as well as the triple helix model "Universityâ€“Stateâ€“Business". This method takes into account the current trends of program and project management of innovation. The mechanism of target distribution for universities 1.0, 2.0, 3.0, 4.0 is investigated. Suggested model of the innovation program management is based on the model of the triple helix interaction and allows to take into account the interests of all groups of stakeholders. The mechanism of formation of the mission of the innovation program, which allows to determine the strategic goals of the innovation program participants, namely â€“ the competitiveness of the University for higher education institutions, the quality of life of the population for the state and the profit for business. The method of formation of the architecture of the innovation program in the system "Universityâ€“Stateâ€“Business" has been developed with the integration of the interests of all participants of the program. The method of creating an office of management of the innovation program is proposed taking into account the model of the architecture of the innovation program.Â Â
Improvement of the Organizational Technological Model of the Route Made Up of the Groups of Cars of Different Owners
Authors: Panchenko S. , Ohar O. , Kuleshov V. , Kutsenko M. , Kuleshov A. 
Published: April 2019

A route made up of the groups of cars of differentÂ owners can beÂ formed in accordance with the technological processes of the station operation by the transport operator, by the operator that owns the rolling stock, by structural or production units of the railways on the access tracks or on the station tracks which are leased by the branch railway lines to cargo owners. RouteÂ optimisationÂ uses an estimation function that determines the routing cost based on the automatic operating system data bases and enables to control routing efficiency and other characteristics used further in making a route table with defining function costs. The technology of cargo transport logistic services with the operation sequence starting from the moment of arrival of empty and loadedÂ cars is proposed. A model for determining cost savings in transportation of the route with bulk cargoes from a consignor as a two-stage model of stochastic programming with recursion and random right-hand sides of the restrictions at the Ukrainian railways is proposed.Â
Evaluation of the Reliability of Transport Service of Logistics Chains
Authors: Vojtov Viktor , Berezchnaja Natalija , Kravcov Andrey , Volkova Tetiana 
Published: April 2019

The article presents the analysis of approaches connected with solving the problems of increasing the effectiveness of managing the processes of goods movement in the supply chains. The attention has been focused on estimating the qualitative component of transport services, and that is the reliability index. The approaches focused on improving the efficiency of providing transport services have been studied. The main parameters influencing the reliability of transport and logistics services are identified: time, qualitative and quantitative characteristics of the goods, as well as the financial component â€“ the cost of the provided transport service. A new methodical approach to estimating the reliability of goods flows in the supply chains is proposed. It is based on the main principles of the theory of automatic regulation and the determination of the reliability of technical systems. A complex index of reliability of transport services of logistics chains is offered: the readiness coefficient and the technical use coefficient. On the basis of structural and parametric identification of the dynamic model of the logistic system of goods transportation, the considered approach allows identifying a large number of constructive and technological parameters which affect the movement of goods flows in the supply chains. The results of the simulation allow one to analyze the influence of the time constant Â which characterizes the response time of the links in the transport and logistics system, that is, the ability of the transport service participant not to respond to any external influences, and the influence of the time constant Â which is responsible for delays, non-productive time losses occurring during the delivery of the goods, on the dynamics of the transitional processes of the goods flow movement for each link in the supply chains. The elaborated method allows developing managing actions aimed at improving the quality of transport services.Â
The Heat Exchange Mathematical Model of Fire in Cable Tunnel Adequacy Research
Authors: Nuianzin Oleksandr , Samchenko Taras , Kasiarum Serhii , Hryhorenko Kostiantyn , Kryshtal Mykola 
Published: April 2019

According to the results of the conducted studies, the adequacy of the mathematical models of cable tunnels for their further use in the study of the temperature regime of the fire was checked. For this purpose, fullâ€“scale tests and findings about the dynamics of temperature change in cable tunnels with known geometrical parameters and fire load were conducted at the experimental test site of the Ukrainian Civil Protection Research Institute (Kyiv).In one of the CFD software systems, a mathematical model of a cable tunnel similar to the actual one was created. A computational experiment was conducted. Based on the results of the computational experiment and field tests, the criteria for adequacy (Student's tâ€“criterion, Cochran's Qâ€“criterion, Fisher's Fâ€“criterion) and the relative error of the experiments were calculated. On the basis of the analysis, the adequacy of the used mathematical models was studied.In this article, further development of the use of computational experiments to study the heat and mass exchange processes during fires in cable tunnels.Â Â
The Use of Heat From the Incineration of Municipal Solid Waste for Processing of Phosphogypsum
Authors: Krot Olga , Vinnichenko Varvara , . . 
Published: April 2019

Municipal landfills and open dumps with industrial waste are global issues which impact on the environment and on the health of populations. The production of phosphoric acid from natural phosphate rock gives rise to an industrial by-product called phosphogypsum, containing mainly dihydrated gypsum. Five tons of phosphogypsum are generated per ton of phosphoric acid production. The technology of roasting of phosphogypsum in a dehydrator, which is a mine, has been described in the article. Such reprocessing of the waste makes it possible to obtain a ready-made high-quality building material. The development of a complex that processes wet and highly adhesive phosphogypsum using the heat of combustion of alternative fuel (municipal waste) is consistent with the synergetic concept of environmentally efficient utilization. Experimental studies identify the most rational parameters of the dehydrator, namely, its operating temperature, have been conducted. The temperature of a heat carrier (air) varied from175 Â°Cto350 Â°Cin the experiment.Â Â
Development potential of Ukrainian maritime enterprises
Authors: Kibik Olha , Khaiminova Iuliia , Kotlubay Viacheslav , Redina Ievgeniia , Belous Ekaterina 
Published: April 2019

The object of the article is research investigation of the development potential of modern maritime industry, including the financial component as essential prerequisites for competitive advantages of modern maritime business-structures in terms of the intensity growth of competition. The components of potential development of maritime transport enterprises are determined. The principles of assessing the potential maritime business enterprise are examined, including its financial component, based on the calculation system of indicators. The financial potential of the Ukrainian Sea Ports Authority is analyzed. The influence of the quality of the pricing decisions on the level of development potential of port enterprises as an important component of the maritime industry of Ukraine is determined. The state and prospects of the development of a national system of port dues is reviewed. The measures to improve the quality of pricing decisions at the example of activities of port enterprises, particularly in the sphere of port dues forming, are proposed. The expediency of introducing incentive tariff approach, which is a prerequisite for attracting additional investments to build and modernize maritime transport infrastructure is established. The basic set of criteria for evaluating strategies of development of maritime transport enterprises is determined.Â Â
Research of the Problems of Financial Support for the Development of Transport Infrastructure in Kharkiv Region
Authors: Bogdan N , Pohasii S , Krasnokutska I 
Published: April 2019

The purpose of the article is revealing the problems of development of transport infrastructure of the region from the financial standpoint, analysing modern approaches to the development of transport infrastructure at the regional level and the financial aspects of its support.It was found that public entities and local authorities have difficulties in financing development of transport infrastructure by state structures and local self-government bodies without any support. It was determined that Kharkiv region is one of the regions with the most developed transport infrastructure, which comprises railways, auto transport, and aviation. The region has a developed system of public transportation. It was justified that in order to maintain and develop the infrastructure of Kharkiv region, the strategic directions of the development of the region should be defined and the plan should be developed to attract investment which will have positive influence on the economy of the region. A number of measures must be taken for solving the problems of the transport infrastructure in Kharkiv region, but these activities require investment in the transport industry that cause difficulties in recessionary environments.The set of targets for solving the problems of funding the development of transport infrastructure of Kharkiv region in the context of the Ukrainian National transport strategy for the period up to 2030 has been developed. The comparative description of sources of financing has been considered. As the results, the best option of financing the transport infrastructure has been selected as the combination of budget resources and other sources of funding (funds from international financial organisations, state guarantee loans, funds of investors, PPP). Detailed elaboration of such a mechanism should be the subject of further research in this area.Â Â
Assessment of Storm Water Quality in Grass Swale by Using Sand Filter Media: a Case Study at UTHM Campus
Authors: Yusoff Mohd. Azlan B. Mohd , Gheethi Adel Al- , Dzain Daniel Aizat B. 
Published: April 2019

Urbanization in Malaysia has contributed to the increased of volume runoff to the drainage system. SUDS (Sustainable Urban Drainage System) / MSMA (Manual Saliran Mesra Alam) has been implement in Malaysia within several of components. Hence, swale is one of the designed and suggested by SUDS or MSMA in order to control the quantity and quality storm water runoff. The present study aimed to determine the quality of storm water runoff in swale and to analyse storm water runoff treatment using sand column as a part of filtration process.Â Water quality parameters tested included COD, BOD5, DO and TSS. The samples was test with sand column on D30, D60, D90 and DMIX. The results revealed that sand column improved the water quality by 4% to 80%. In conclusion, the sand column can be used to improve the storm water quality and can enhance the natural habitat.
Mechanical Properties of the Concrete Containing Porcelain Waste as Sand
Authors: Jamal Mohammed , Noh Mohammad Zaky , Juboor Shihab Al- , Wan Mohd Haziman Bin , Takai Zakiyyu Ibrahim 
Published: April 2019

The demand of concrete have been increases on a daily bases which consume a lot of natural resource such as sand and gravel,Â there is an immediate need for finding suitable alternative which can be used to replace sand partially with another materials with high proportion . Ceramic waste is one of the strongest research areas that include the activity of replacement in all the sides of construction materials. This research aims to improve the performance of concrete using ceramic waste, and demonstrate the performance of mechanical properties to the concrete with partial replacement of sand by using waste porcelain. For these, we analyzed the mechanical properties of the concrete such as compressive strength, split tensile and flexural strength, the specimen were measured based on 10% ,20% ,30% ,40%, and 50% weight ratio of replace sand with waste porcelain at different time under water for 7 days , 28 days , 60 days . The optimum consideration were given to mechanical properties of the concrete, at different amount of ceramic waste as sand.
Effect of Annealing Temperature of Cugao2 thin Films by Using RF Magnetron Sputtering Technique on Optical and Structural Properties
Authors: Yip Lam Wai , Alias Afishah , Awang Asmahani Binti , Rahman Abu Bakar Bin Abd , Mohamad Khairul Anuar Bin , Nayan Nafarizal Bin , Pien Chee Fuei , Abdullah Siti Ashraf 
Published: April 2019

Cu-based conductive oxide such as CuGaO2 is seen to be a promising transparent p-type oxide material. The study of p-type semiconductor CuGaO2 thin films have been carried out to investigate the effects of different parameters in providing the optimum result in achieving good optical transparency and conductivity of the thin film. The CuGaO2 thin films were fabricated on quartz substrate via the Radio Frequency (RF) magnetron sputtering technique with varying substrate temperatures and different annealing temperatures. The p-type thin films were deposited at a temperature ranging from room temperature, 100Â°C, 200Â°C and 300Â°C. The samples were also annealed varying from temperature of 500Â°C, 600Â°C, 700Â°C and 800Â°C. The fabricated sample were characterized using X-ray diffraction (XRD), UV-Visible spectroscopy, and atomic force microscope (afm). XRD showed a peak at 2Î¸ = 36.10Â° (012). The optical transparency values achieved from UV-Vis spectrometer were seen to be approximately 80% and the bandgaps were found to be in the range of 3.34-3.43 eV which is in line with the bandgap value from the research on CuGaO2 thin films.Â From the afm, the mean surface roughness increases with increasing temperature and this is due to the increment of grain size. The highest grain size was observed at substrate temperature of 200Â°C.
Effects of Pulsed Nd:YAG Laser on Pt/Ag Thin Film Metal Contacts
Authors: Bhari Bibi Zulaika , Ali Ahmad Hadi 
Published: April 2019

This study focused on the effect of laser annealing on Pt/Ag metal contacts deposited on Silicon, (Si) substrates. DC sputtering was used to deposit the metal thin films on the Si. The samples were treated by annealing using pulsed Nd:YAG laser. Then, the samples were characterized based on its morphological, optical, structural and electrical properties. From surface morphological, it is clearly shown that the surface roughness of the laser annealed sample is smoother than the as-deposited sample. The calculated energy band gap was obtained as 1.38 eV. For electrical properties, the resistivity for laser anneal was lower compared to as-deposited sample, which are Â Â Â Â 5.10 Ã— 10-4 ohm-cm and 1.37 Ã— 10-3 ohm-cm respectively. The conductivity increases when the resistivity decreases.
Performance Characteristics of Head-Worn Antenna based on Dielectric Substrate Over WBAN Application
Authors: Mumin Abdul Rashid .O. , Alias R. , Abdullah Jiwa , Abdulhasan Raed A , Dahlan Samsul Haimi , Joret Ariffuddin 
Published: April 2019

Performance characteristics of head-worn antenna based on dielectric substrate for WBAN application with various dielectric constant for square slot patch antenna are demonstrated in this paper. The impact of Electromagnetic (EM) energy from antenna towards human head and on antenna performance changes due to human head proximity are explored in this paper. The human head exposed to 5.8 GHz on ISM frequency band and radiation pattern, return loss, efficiency, and bandwidth and SAR distribution value performance have been thoroughly explored. However, decreasing the antenna size is a great topic ‎of antenna development, which differentiates antenna performance for a small antenna. Multilayered human head phantom having five layers are constructed based on different tissues and these tissues represent human head parts such as (Skin, fat, Cerebrospinal fluid (CSF), bone and brain), all of each tissues are based on their electromagnetic properties and set at 5.8GHz.The proposed antenna with human head model simulated through (FDTD) using CST and variation of parameters of antenna with MATLAB. Antenna with FR4 substrate produces the highest SAR values while antenna with RT5880 substrate has the lowest SAR value 0.206 W/kg and 0.0784 W/kg at 5.8 GHz frequency exposed for 10g tissue respectively. It can be observed that the radiation pattern shows that the antenna gain with substrate of Rogers RT5880 is increased from front –to-back from 7.1 to 7.29 dB in the free space and on human head respectively. A good agreement between simulation and measurements in free space are obtained. The presented prototype has a potential to work for ISM applications.
Preliminary studies of 12S-8P and 12S-14P Hybrid-Excited Flux Switching Machine with FEC in radial direction by using JMAG-designer software
Authors: Rahimi S. Khalidah , Ahmad Md. Zarafi , Sulaiman Erwan , Othman Syed M. Naufal Syed , Soomro Hassan Ali 
Published: April 2019

In this paper, design analysis of Hybrid- Excited Flux Switching Machine (H-EFSM) with 12Slot-8Pole (12S-8P) and 12Slot-14Pole (12S-14P) topologies are presented. H-EFSM has been introduced in which the advantage of Permanent Magnet (PM) machines and DC Field Excitation Coil (FEC) synchronous machines is combined. H-EFSM design proposed less permanent magnet consumption, high to torque/power density and high efficiency. In recent, most of H-EFSM having FEC arranged in theta direction that affect in flux production which cause less flux generation and machines performances. Therefore, a design of 12S-8P and 12S-14P H-EFSM with FEC arranged in radial direction is proposed to prevent flux cancellation and produce high flux linkage. Performance analysis of 12S-8P and 12S-14 H-EFSM such as PM flux, induced voltage, cogging torque and flux distribution are investigated by 2-D Finite Element Analysis (2D-FEA). A design with 12S-14P configuration has achieved the higher torque and power with 220.15Nm and 92.45kW, respectively at maximum field and armature current density