bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Circuit Design of a Rowing Electric Installation with a Distributed DC Bus of a Port Icebreaker
Authors: Romanovskiy V V , Bezhik A S 
Published: May 2020

Abstract
Currently, there is a steady trend in increasing the volume of electrical equipment used in shipboard needs. At the same time, the primary electric power system of ships has long been based on an alternating current system. However, due to the changing and increasing requirements for the quality of the generated electric energy, the marine industry is developing more and more promising directions for the development of electrical systems. Thus, the most efficient and environmentally friendly shipboard power distribution system is the direct current (DC) system, which was adopted for a single power plant installation in combination with an alternating current network. This article discusses the current topic of electric propulsion on ships. The circuit design of a rowing electric installation with a distributed DC bus of a port icebreaker is considered. The expressions used to calculate the static load and build an electromagnetic model of a permanent magnet synchronous motor are given. Computer models for calculating the load in static and dynamic modes are shown.
Experience of Use High-Precise Position Systems for Inland Waters
Authors: Karetnikov V , Pashchenko I , Kozlov V , Butsanets A 
Published: May 2020

Abstract
Real Time Kinematic (RTK) is a differential method of object positioning using GNSS in which code corrections are supplemented by phase ones and transmitted from a base station (with precisely known coordinates) to a movable receiver in real time [1]. Having a series of advantages over classical differential methods of object positioning the most essential of which is centimeter precision of positioning, the method has found wide use in various spheres. Networks providing RTK solutions in real time on a commercial basis, and also free of charge in certain countries within the frameworks of state geodetic networks cover considerable areas with a field of high-precision corrections.
EDM Process by Using Copper Electrode with INCONEL 625 Material
Authors: Yuvaraj N. , Arshath Raja R. , Palanivel Prakash , Kousik N.V. 
Published: May 2020

Abstract
Electrical discharge method (EDM), based on the thermo electrical energy of the workpiece and the mechanical electrical machining, are non-traditional machining methods. Current development of the nano mixed dielectric discharge device has the latest trends in tough and soft materials finishing. This research assesses the impact on nano-particle mixed electric discharge extraction of the inconel 625 product by means of a copper electrode of the material removal frequency (MRR), device wear level (TWR), and superficial surface roughness. In contrast to dielectric fluid are the output parameters such as current, period and frequency, and nano-substances of titanium carbide. During this phase, a sequential, separate discharges between the electrode and the workpiece contribute to the product removal electro thermally. The method quality largely depends on the Electrode content, the production of the electrode workpiece product. Appropriate electrode choice may reduce machining costs. Die-Sinker EDM with the copper electrode is therefore able to provide for improvement of output parameters and reduction of production costs. In case of surface roughness, a copper electrode has improved efficiency and is better suited for nano powdered dielectric medium.
Progress on Pine Derivative Products as Fuel Source in Indonesia
Authors: Setyawan H Y , Sunyoto N M S , Wijana S , Pranowo D 
Published: May 2020

Abstract
Pine resin is a non-wood forestry product in Indonesia that can be converted into a much higher value product. Pine resin traditionally is converted into rosin and turpentine. Due to the scarcity supply of fossil fuel, turpentine has been studied as fuel for diesel substitution. Pinene, the highest component found in pine resin is the primary fuel source candidate. Pinene dimer, modified pinene using catalysts or ozone have a heating value similar to that of JP-10, a tactical fuel for rockets. This paper discussed the technological development of pinene and pinene dimers as a fuel. The opportunity and challenge for producing pine based fuel in Indonesia were also addressed.
Improvement of Heat Sink Performance by Using Graphene Nanosheets Coated by Chemical Spray Method
Authors: Jaafar A. A. , Al-abassi S. A.W. , Alhattab H. A. , Albaghdad M.A. , Mosa A. A. , Al-Musawi H.K. , Abo Gneem L.M. 
Published: May 2020

Abstract
Graphene nanosheets were fabricated on a metal (Al) substrate by using a chemical spray method. Annealing process has been applied to reducing the concentration of carbon and to increase the sheet hardness. Surface morphology measured by metallurgical microscope Device Corporation, X 1600. Thermal camera was used to measure the performance of coated heat sink. The temperature was measured from the two sides, one from heat sink side, and the other one is from power transistor side. The results showed that the temperature of the transistor was decreased by about 4.3 °C in the case of heat sink coating with 80 μm layer thickness while decreased by 6.9 °C in the case of the heat sink coating with 120 μm layer thickness.
Steel Corrosion Behaviour in Acidic Solution for Application in Petrochemical Distillation Systems
Authors: Fajobi M A , Loto R T , Oluwole O O 
Published: May 2020

Abstract
The electrochemical reaction response of austenitic 316L stainless steel and carbon steel was examined through weight loss analysis in 1M, 2M and 3M of HCl acid. The results show that austenitic 316L has high corrosion resistance than carbon steel for the test analyzed with the lowest corrosion rate of 0.0018mm/y at 1M of HCl and highest at 0.0053mm/y when compared with carbon steel which has the lowest corrosion rate of 0.0003mm/y for 1M of HCl and highest at 0.0013 mm/y of 3M of HCl solution all at ambient temperature conditions. General corrosion was displayed on the surface of the carbon steel but austenitic 316L was not affected due to the presence of chromium alloy and other alloying elements.
Temperature Effect on the Deformation of the Recycled Hot-Mix Asphalt Concrete with Nano Crumb Rubber as an Added Material with Wheel Tracking Machine
Authors: Hadiwardoyo S P , Aryapijati R H , Sumabrata R J , Iskandar D 
Published: May 2020

Abstract
The use of materials for the construction of roads can be done by recycling asphalt concrete mixtures that have reached fatigue or aging conditions. The results from stripping the asphalt concrete layer on the surface layer can be reused after processing by recycling the material. The recycling process is often intended to preserve the environment from natural damage due to the processing of material for asphalt concrete mix. To improve the performance of the recycled mixture, additives have been widely used and the use of building materials as additives can also be obtained from building material waste. One of the waste that continues to increase is the waste of vehicle tires. In this research used tire waste that has been mashed up to Nano size. The use of finer used tire sizes is intended to facilitate the process of mixing with asphalt. Recycling performance of hot mix asphalt concrete on deformation performance has been used rutting test using Wheel Tracking Machine at a temperature of 27°C, 40°C and 60°C. The test results showed a decrease in the rate of deformation in the asphalt concrete recycle mixture using Nano crumb rubber added material.
Analysis and Research on the Working Parameters of Colloidal Spraying for the Thermal Insulation Layer of Rocket Tank
Authors: Xue Haiyang , Xu Haibo , Qian Yingkun 
Published: May 2020

Abstract
In this paper, the working parameters of DW-1 type colloid spray coating for rocket tank insulation are analysed and studied, and the optimal working parameters are determined. Firstly, a flow field simulation analysis model of thermal insulation layer DW-1 colloid spray is established, the spray flow field simulation of different spraying working parameters is performed. Then the relationship between the flow field characteristics such as spray speed and atomization uniformity and the spraying working parameters are initially determined. After that, an analytical model of droplet impact is established to study the influence of spraying speed on the impact dynamics and spreading quality of the droplet, and the optimal working parameters of colloidal spraying are determined.
Dynamic Behavior Analysis of Feed Drive System Using Linear Guideways with Different Ball Diameters
Authors: Tanaka Kazuma , Yamazaki Takanori 
Published: May 2020

Abstract
The feed drive system for machine tool consist of rolling elements such as ball screw and linear guides. It is well known that in the positioning of linear guides using steel ball rolling, the contact surface has nonlinear spring characteristics. This phenomenon is deteriorating the accuracy of the machine tool. In this study, we have manufactured a feed drive system in which the physical contacts are only linear guides by using a linear motor as actuator. At first, we measured the responses to some fine feed amount for feed drive system. Next, the same experiment was performed by changing the linear guideways. This paper presents the transition of nonlinear spring characteristic region by considering the response to linear guides under different conditions.
Vibration Compensation of Checkweigher Using Acceleration Sensor
Authors: Tsuzura Akinori , Yamakawa Yuji , Yamazaki Takanori 
Published: May 2020

Abstract
The checkweigher is a device that measures mass continuously and it carries out mass measurement while conveying an object on a belt conveyor. It is a device that operated an active role in various fields such as food, medicine, and industrial products. Although the load cell scale is often used to measure measurement in the checkweigher, due to the structure of load cell, the accuracy is susceptible to environmental vibration. It is difficult to generate low frequency input such as floor vibration with the general vibration exciter. We first manufactured a device that can reproduce environmental vibration. In this study, we present the response of the load cell to excited by the device, moreover consider the vibration compensation using an acceleration sensor.
The technology of using inflatable structures made of special materials to adapt the de-orbiting system for removing spacecraft
Authors: Koryanov V V , Toporkov A G , Kazakovtsev V P , Nedogarok A A 
Published: May 2020

Abstract
We are today facing a huge issue on the concentration of space debris in near-Earth space. More than 15,000 debris have been recorded, and this represents a danger for current and future missions to space. A solution to this issue is to remove these spacecrafts from orbit. One of the ways to do it is to use inflatable device. These braking device can be installed on the landing vehicles on Earth, before their launch, or after they have been labelled as space debris. Studies have already been conducted about inflatable device. The results of these studies show that using an inflatable device on an orbital spacecraft significantly reduces its lifetime (it then does not exceed 25 years in most cases). Using inflatable device instead of rigid device has advantages, such as a small mass and a great compacity, which is convenient to respect the required launching volume.
Structure, luminescence and mechano-optical properties of strontium aluminate doped with europium and dysprosium ions
Authors: Banishev A. A. , Banishev A. F. 
Published: May 2020

Abstract
Photoluminescence spectra and kinetics of mechanoluminescence of finely dispersed powder of SrAl2O4:(Eu2+, Dy3+) and Sr4Al14O25:(Eu2+, Dy3+) phosphor was investigated. Photoluminescence was excited by nanosecond laser pulses with a wavelength of λ = 355 nm and by a group of cw lasers with different wavelengths (λ=355, 404, 440, 530 nm). Photoluminescence of the materials has been revealed in the long-wave (550 to 750 μm) spectral region, which is indicative of the existence of corresponding energy levels of Eu2+ions. It was shown that, at low power density, a single wide broadened line of photoluminescence was observed. As radiation power density is increased, additional photoluminescence lines begin to appear. The microstructure of the powders has been investigated with the scanning electron microscope. It has been found that the powder consists of microparticles (granules) of the sizes up to 100 μm. The microparticles show a granular structure, the grain size being as large as 25 μm. Mechanoluminescence was initiated by an acoustic wave generated by short laser pulses. A mechanism of mechanoluminescence excitation has been suggested. It has been concluded that mechanoluminescence of SrAl2O4:(Eu2+, Dy3+) is excited owing to activation of the traps during their interaction with the electric fields of moving grain boundary dislocations as the result of grain boundary sliding under deformation of microparticles on impact.
The Integration technology of desulfurization, denitration and heat recovery from coke oven flue gas
Authors: Jiang Hui , Li Shun , Ha Jun , Guo Wei , Pan Yixin , Wan Xue , Xie Guowei 
Published: May 2020

Abstract
The main components of coke oven flue gas were SO2, NOX etc. SO2 and NOX were not only harmful to human health, but also seriously polluted the environment. The stricter “Standard for Discharge of Pollutants from coking chemical industry” was introduced. An integration settlement scheme of flue gas desulfurization, denitration and waste heat recovery was put forward. The proprietary core technologies, such as denitration, COG desulfurization and radial heat pipe boiler were researched. The integration settlement scheme can solve the problems of polluting the environment and waste heat without recovery, which had not only significant economic benefits, but also huge social benefits.
Pavement Deterioration Model Using Markov Chain and International Roughness Index
Authors: Sati A S , Abu Dabous S , Zeiada W 
Published: May 2020

Abstract
Pavement deterioration leads to drop in serviceability and possibly failure of pavement sections due to initiation and expansion of distresses such as cracks and rutting. This paper aimed at predicting the future condition of pavement sections based on Markov chain model and the international roughness index (IRI). Developing this model can facilitate life cycle analysis and selecting the correct treatment at the right time. The historical IRI data of Canadian pavement sections were collected from Long term pavement performance (LTPP) database. IRI values were used to assess condition of the pavement sections based on the recommended ranges by the Federal highway administration (FHWA). The transition probabilities were estimated using the percentage prediction method based on historical condition data extracted from the LTPP. These probabilities are assembled in a transition probability matrix essential for the Markov chain model. The developed matrix can be used to forecast pavement conditions after any number of transition periods. The developed method assists in predicting pavement performance and facilitates the decision-making process. The method is applied to a real case study to examine its validity. The model can be expanded further by considering additional data from additional pavement networks.
Computer Modeling on the Effect of the Multistep Nanoimprinting Process in Elastic Deformation Recovery of COC (Cyclic Olefin Copolymer)
Authors: Almadani Hamzah , Chen X , Cheng Junfei 
Published: May 2020

Abstract
The effect of the multistep imprint in elastic deformation recovery was studied numerically with more than one roll and different depth ratios. As well as effect hold-on time on the elastic deformation recovery of polymer Cyclic Olefin Copolymer (COC) material was studied using Generalized Maxwell (GM) constitutive model and their parameters in finite element simulation software of ABAQUS were presented. Firstly, the modified Genetic Algorithm (GA) was employed to obtain a Prony series of the viscoelastic model in terms of experimental data of the complex modulus for COC. To evaluate the elastic recovery of the microstructure, the cross-sectional area of micro-channel before and after hot-imprinting was computed and compared numerically. The simulated results were analysed and clearly showed an improvement in the elastic recovery rate of the microstructure area as the multi-step of rolling was employed.
Safety Assessment of Steam Generator in Hydrogen Production Unit under Local Overtemperature Conditions
Authors: Du Liang , Yan He , Zhao Wenjing , Liu Deyu , Chen Yanze 
Published: May 2020

Abstract
A steam generator at the bottom of a radiant chamber of a hydrogen production unit is used to heat the conversion gas of the reformer to the boiler feed water, thus producing medium pressure steam. During the inspection process, the color of the temperature indicating coating was found to be abnormal near the manhole block of the equipment. The maximum temperature of the wall of the device was up to 472.7°C by infrared thermal imager. In this paper, the reason of the overtemperature of the steam generator is analyzed. Secondly, the stress strength evaluation based on the conventional strength checking formula and the finite element numerical simulation analysis method is carried out. Finally, the monitoring suggestion and the follow-up test proposal under the high temperature operating condition are given.
Preliminary Evaluation of Active Tremor Cancellation Spoon for Patients with Hand Tremor
Authors: Ripin Zaidi Mohd , Chan Ping Yi , Alisah Izudin 
Published: May 2020

Abstract
Hand-arm tremor is common in Parkinson’s disease (PD) patients and essential tremor (ET) and can result in difficulty of carrying out daily tasks such as eating and writing. One of the approaches to overcome this is the application active tremor cancellation (ATC) to attenuate the vibration due to the hand tremor on the device hold by the hand. There are several ATC spoons in the market which are meant to help the patient to eat however third-party evaluation of the effectiveness of this technology could not be found in the literature. This study evaluates Liftware, a spoon with ATC by measuring the acceleration performance of the spoon over the frequency range of 1-12 Hz which adequately covers both the PD and ET. In the first part of the study, the device was evaluated on the isolation index throughout the tested range of frequency along the vertical or gravitational, and the horizontal directions, the direction perpendicular to both gravitational and the longitudinal axis. Subsequently, the device was evaluated for the limit at which the food it contains start to spill. Solid food, typically boiled peas and liquid, namely curry was the food tested with the spoon. Ten measurements were carried out for each type of food and the average limits prior to spillage was presented. The results show that the isolation indices in vertical and horizontal directions range from 0.06 to 0.63 and 0.06 to 0.62 respectively at frequency range of 3-12Hz. The limits of the spoon in supporting the boiled peas and curry are 1.4g and 0.9g respectively. However, the preliminary study provides part of the knowledge useful for the potential users and researchers. Further study to subject the device under different conditions, especially in clinical settings is required.
Sound and Vibration Damping Properties of Water Retted Kenaf Bast Fiber (WKF) and Poly (Butylene Succinate) PBS
Authors: Wan Mamat Ali WMA , Ooi L.E. , Thirmizir M.Z.A 
Published: May 2020

Abstract
Nowadays, considerable attention has been paid on the utilization of natural materials to reduce the carbon emission from material synthesis. In this study, the sound and vibration damping properties of natural material based Poly Butylene Succinate(PBS) and Water Retted Kenaf Bast Fiber(WKF) were explored and characterized. The goal is to characterize the sound absorption and damping properties of the PBS and WKF at difference materials percentage. The (material)PBS and WKF are produced by using Compression moulding machine model Gotech GT-7014-H and the sample thickness is 3 mm. The vibration damping measurement of the material is carried out based on the free vibration method technique. It is observed that the damping factor is obtained is 0.0469 for PBS material. The measurement of the sound absorption coefficient of the PBS and WKF is carried out using the impedance tube. The result shows that the maximum sound absorption of 0.305 was observed at a frequency of 642 Hz for PBS material. Whereas Tensile Strength, for PBS material shows 26.33 MPa. These results suggest that the PBS could be a viable candidate for applications which need good sound and vibration properties.
Monitoring of Gear Surface Roughness in Angle Grinder using Vibration Analysis
Authors: Yusuf Z N M , Sidek N S D , Hamid M N A , Teoh P Y 
Published: May 2020

Abstract
This paper aims to provide the relation between surface roughness of angle grinder towards vibration amplitude. Prolong usage of angle grinder over excessive force will affect the performance of angle grinder where it tends to vibrate due to surface roughness of gear and create excessive vibration that will lead to hand-arm vibration system. Therefore, this study is conducted to investigate surface roughness of the gear teeth of angle grinder affects the amplitude of vibration. The amplitude of the vibration for angle grinder is conducted by using LMS data acquisition system. Meanwhile, the roughness of the gear teeth is measured by using Keyence Laser Confocal Microscope. The data was taken by every 100 hours of grinding process. The results show that the surface roughness of the gear teeth is steadily decreasing due to contact between gears and subsequently resulted increasing the amplitude of the vibration. For 500 hours measurement, the correlation of surface roughness of gear teeth with the amplitude of vibration is 93.7% for marked tooth and 86.5% for adjacent tooth, this indicates the strongest possible agreement that when surface roughness of the gear teeth decreasing, the vibration amplitude is higher.
Numerical Analysis on Vibro-acoustic Characterisation of Hybrid Honeycomb Structure with Flow Permeability
Authors: Tee Zhen Wei , Teoh Choe Yung 
Published: May 2020

Abstract
The application of conventional noise attenuating structures was often limited when the exchange of air was required due to the trade-off between their noise attenuation properties and ventilation efficiency. The large physical footprint of conventional noise attenuating structures with flow permeability had also limited their applications. This paper investigated the use of corrugation structure in lightweight honeycomb sandwich panels with flow permeability to improve noise attenuation while preserving ventilation. The vibro-acoustic property of the honeycomb structure with flow permeability at low to medium frequency range (50-3000 Hz) was investigated through numerical simulation. Two different hybrid panel designs with U-shaped and V-shaped corrugations in the honeycomb core had been proposed and were found to exhibit superior sound transmission loss (STL) compared to the honeycomb panel without significantly affecting the flow performance. It was found that in the frequency range of 50-3000 Hz, the unweighted STL of the U-shaped corrugation honeycomb hybrid panel (UCHP) and V-shaped corrugation honeycomb hybrid panel (VCHP) was 19 dB and 25 dB higher than the honeycomb panel respectively with negligible effect on the flow performance. The proposed hybrid panel showed promising noise attenuation applications which involved fluid flows such as in fan and engine noise reduction.