bluuebunny/crossref_metadata_2025_split huggingface dataset:
Substantiation of laboratory facilities set to study physico-mechanical properties of coal-gas-moisture composites
Authors: Rostovtsev VI , Kulagin OR , Sivolap BB 
Published: July 2020

Abstract
Intensive development of coal deposits along with introduction of advanced high-performance machinery leads to higher number of fire- and explosion-hazardous events induced by gas dynamic phenomena at mines. Mass media regularly inform on tragic events concerning the combustible gas explosions and loss of lives at collieries in Russia and abroad. The main subject is development of a composite on the basis of solid coal and rock particles, gasses (methane, hydrogen) and moisture, prone to penetrate into mechanisms, initiating catastrophic dynamic processes in course of mining operations. The present research objective is foundation of a laboratory base to develop coal-gas-moisture composites in the form of coal cores, experimental investigation into their physico-mechanical properties. The special stand for development and investigation into coal-gas-moisture composites was designed. The relationships of variations in physico-mechanical properties of cores versus pressure were obtained experimentally on various materials (coal, limestone, graphite, etc) at the new-designed stand. The long-flame coal of different coarseness were used to establish specific variations in temperature, deformation of briquetted mass, its density under increase in pressure up to 200 MPa. It is demonstrated that temperature of a coal briquette increases by maximum 14 °C under atmosphere pressure and 10 °C in vacuum. The test stand allows physical modeling of coal and rocks with account for their material composition. The scientific novelty involves development of composites simulating mineral coal and rocks under prescribed physical and mechanical conditions.
Stress state of underground opening support considering its interaction with rock mass
Authors: Seryakov VM 
Published: July 2020

Abstract
This study addresses stress state of support systems in underground mine openings when the boundary of an opening is incompletely relaxed from forces commensurable with the initial stress state of rock mass. The calculation algorithm is based on the stiffness matrix composed of mechanical characteristics of intact rock mass. The features of the stress state of underground mining opening support in various modes of deformation of the opening boundary are determined.
Automatic detection of number-plate and traffic infractions of motorcyclists by Intelligent Transportation Systems
Authors: Valencia J F , Ramírez-Guerrero T , Castañeda L F , Toro M 
Published: July 2020

Abstract
Public Transportation Strategic Systems are a digital transformation for the urban transportation service in the Colombian medium-size cities, from 200,000 to 600,000 inhabitants. The implementation of the urban public transportation services has not started in many cities; as a result, this cities in Colombia have an increase of illegal motorcycle taxis, which cause a high number of road accidents. The main method for controlling illegal motorcycle taxis is by giving the drivers transit fines. In order to give such transit fines, transit police have several control points in medium-size cities. In this article, we developed a mobile application to detect three types of transit infractions usually committed by motorcycle taxi drivers. The purpose of this application is to be a tool for the transit police agents to disincentivize the use of motorcycle taxis. The mobile application detects a possible transit infraction, saves the photo, motorcycle plate number, date, and time. Afterwards, the application generates a support for the transit infractions that will be issued by the transit police officer. We performed an experiment using this mobile application in the city of Valledupar, Colombia. The mobile application captured 40 possible transit infractions.
Development of a High Performance Remote Terminal Unit (RTU) of Wireless SCADA System for Monitoring Performance of Micro Hydro Power Plant
Authors: Salahuddin  , Bakhtiar  , Yusman  , Fadhli  
Published: July 2020

Abstract
Remote Terminal Unit (RTU) is one part of SCADA system that functions to collect data from the plant, RTU itself is a unit of minicomputer that is equipped with a standalone system with a smaller physical size. The main objective of this research is to develop a high performance RTU for the wireless SCADA system that is applied to monitoring the performance of microhydro power plants (MHPP). Remote terminal units are built using Arduino Uno as a control center that will regulate analog data traffic from sensors connected to the system. The Remote Terminal Unit processes data from sensors that are converted into digital data and then sent via communication devices to the Main Terminal Unit (MTU) section that is located in the remote control center. The data received from sensor consist of voltage, current, frequency and turbine rotation of a MHPP. The Remote Terminal Unit (RTU) has been able to properly acquire data received by the sensor and then send it to the Main Terminal Unit via an AX.25 protocol based communication device.
Inhibition of Free Fatty Acids generation in Crude Palm Oil during storage by using UV-C Light treatment
Authors: Said S D , Maimun T , Asnawi T M , Muslim A 
Published: July 2020

Abstract
During the lengthy storage of crude palm oil (CPO), free fatty acid (FFA) concentration generated in the oil tends to increase which will affect the quality of CPO as the result of lipase enzymatic degradation of triglycerides. Currently, the conventional thermal processes in CPO storage tanks still applied to reduce the FFA formation. However, the thermal method is not very effective in reducing FFA for prolonged heat exposed due to deteriorate the CPO quality and high energy consuming. The alternative UV-C light technique gives some advantages compare with thermal treatment i.e less energy consumption, simple method, cheaper investment and low-cost operation. This study is aimed to evaluate the effects of UV-C light on inhibiting FFA generation in CPO during storage. The evaluation of UV-C light effect on the inhibition of FFA generation was conducted by irradiating CPO samples with various UV-C light exposure time. The FFA level of CPO samples was analyzed by using sodium hydroxide solution before and after treatment. The results show that UV-C light has the ability to deactivate lipase enzyme and consequently inhibit FFA generation in CPO.
Optimization Design of Electrochemical Machining Process of SKD11 Tool Steel Using Weighted Principal Component Analysis (WPCA)
Authors: Lusi N , Pamuji D R , Afandi A , Prayogo G S 
Published: July 2020

Abstract
This research was carried out on electrochemical machining (ECM) process using a workpiece material of SKD 11 tool steel and electrode of brass. Three process variables, i.e., voltage, electrolyte concentration and gap width with three levels for each process variables investigated. Based on the number of process variables and its level, an orthogonal array of L9 and two times replications employed in the design of the experiment. Setting a combination of significant machining parameters to maximize the material removal rate and minimize the surface roughness of the workpiece based on the results of optimization using the Taguchi method and weighted principal component analysis is a combination of voltage factors at level 3 of 48 V, electrolyte concentration at level 2 of 150 g/l, and gap width at level 1 of 1 mm. Machining parameter that has the greatest contribution is an electrolyte concentration which is 41.98%, then the contribution of voltage of 32.33%, and the gap width is 5.63%. Based on the results of confirmation experiments reveal that principal component analysis can effectively acquire the optimal combination of cutting parameters.
Development of Web Based Real Time Remote Laboratory for Teaching and Learning
Authors: Mahmud Faisal , Zubir Mohd Nashrul Mohd , Ahmad Mohd Yazed Bin , Abdullah Zuraidah Binti , Kadri Nahrizul Adib Bin , Obaidellah Unaizah Hanum Binti , Amin Faisal Tousif 
Published: July 2020

Abstract
A concept has been developed that utilizes the internet to conduct live laboratory exercises under remote condition. The idea about remote laboratory is based on Human-Computer Interaction (HCI) philosophy, controlling system and communication. The integration of these three components plays an important role in making the facility accessible and operational online. In order to realize this concept, an open-source development tool called Node-RED which links the user and the remote facility via a web interface platform has been adopted. Node-RED is a programming tool for connecting hardware, Application Programming Interface (API) and online services in various ways. The node-red dashboard allows users to carry out remote experiments. This strategy would also allow users to leverage internet resources to implement laboratory exercise by eliminating relevant time and space limitation problems. An experimental setup was created to demonstrate the above-mentioned remote laboratory model. Various types of sensors and actuators were used to replace physical interaction between the end-user and the laboratory deployment. A microcontroller was employed to process and relay the data between the host computer and the equipment. It was shown that the communication between the web and remote infrastructure was successfully established and the facility was able to be accessed and operated via the web-based interface using internet protocol. This endeavor serves as an important milestone towards realizing internet-based education particularly in science, technology and engineering streams which primarily involves physical laboratory exercise.
Lateral Control of Functionally Graded Composite Beam under Static Load by using Piezoelectric Layer
Authors: Toudehdehghan Abdolreza 
Published: July 2020

Abstract
Controlling the deflection of a composite cantilever beam under concentrate static force at the free end is investigated. The composite beam is made of ceramic and metal, which gradually change from ceramic to the metal in thickness coordinate. This kind of composite is called Functionally Graded Material (FGM). In FGM, material properties are presumed to differ as an exponential function. The governing equation of the rectangular composite beam is based on Euler-Bernoulli deformation theory. Two control models are considered in this article. First, two piezoelectric actuators are attached to the two sides of the composite beam which each of these actuators is applied the voltage separately. To control the deflection of each point of the composite beam, the difference between the two voltages is considered constant. Second, a piezoelectric actuator is attached to the free end of the composite beam, which also provides a relation to control any desired point of the composite beam. By comparing the two models, the superiority of the second model is proven.
Synthesis of Castor Oil-Based Polyols Reinforced with Organoclay-Chitosan as Nanocomposite Polyurethane Coatings in The Application of Environmentally Friendly Medical Equipment
Authors: Rihayat T , Putri K Y , Yunus Y , Riskina S 
Published: July 2020

Abstract
In this research, castor oil is used as raw material for making polyols. This review provides an overview of polyurethane coatings for the application of anti-bacterial medical devices. The anti-bacterial properties used in this review are chitosan. Chitosan is an amino polysaccharide that has a great structural tendency to produce bioactive materials with innovative properties and a variety of applications, especially in the biomedical field. To improve the physical and mechanical properties of polyurethane such as heat resistance, modifications were made with the addition of bentonite. This study with a variation of polyurethane/bentonite/chitosan ratio of 2, 3 and 4 (% w / v), as well as tests conducted in the form of FTIR, TGA, and anti-bacterial tests. The results obtained for the best level of thermal stability in polyurethane / bentonite / chitosan 4%: 4% with a temperature of 600.94 °C and remaining weight 7.5 mg, while the anti-bacterial test obtained the largest inhibitory zone in polyurethane/bentonite/chitosan 4%: 4% for Staphylococcus Aureus bacteria at 7.66 mm and Escherichia Coli bacteria at 5.8 mm.
Travel Time Estimation for Destination In Bali Using kNN-Regression Method with Tensorflow
Authors: Murni  , Kosasih R , Fahrurozi A , Handhika T , Sari I , Lestari D P 
Published: July 2020

Abstract
On a tour activity, travel time estimation is needed so that the travel itinerary goes according to the plan. Travel time estimation is very important so we can estimate the time needed to arrive at the destinations in the travel itinerary. Therefore we need a method that can estimate travel time from one place to another. In this study, we propose the k-Nearest Neighbors Regression (kNN-Regression) method with Tensorflow to construct an estimation model. The proposed number of features in our estimation model is 8 features, i.e. zone information, time information, day information, weather information, temperature information, wind speed information, humidity information, and precipitation information. The data obtained from travel information from Ngurah Rai airport to Kuta Beach using GPS and weather information using weather application in real-time. We divide our data into two groups: a historical group consisting of 177 data and a testing group consisting of 51 data. In the testing stage, kNN-Regression will find the historical data closest to the testing data, so that the estimation value of the travel time of some testing data is not much different from the value of the nearest historical data. As a result, our proposed model gives the Mean Absolute Error (MAE) of 2.196078, Root Mean Square Error (RMSE) of 2.977036294 and accuracy rate 88.1819%.
The Effectiveness of Coffee Bean Processing Machines in the Rezeki Farmers Group in Takengon, Central Aceh
Authors: Amri  , Salahuddin  , Rizka Muhammad 
Published: July 2020

Abstract
The appropriate technology program in the Community Service Scheme of Science and Technology for the community entitled “Effectiveness of Coffee Bean Processing Machines in the Rezeki Farmers Group in Takengon, Central Aceh” is to assist partner communities in efforts to improve UD Rezeki Group productivity through the application of appropriate technology and training in product diversification skills. coffee preparations. The method in implementing the Community Service Program consists of three activities, namely (1) making Coffee Roasting machines, flour and packaging, (2) training in processing skills for types of coffee beans, Arabica and Robusta and (3) Coffee Packaging Systems. The purpose of this Coffee Grinder Machine Design activity can facilitate the work in large-scale coffee milling. The methods taken in this design include: the survey stage, the planning stage, the implementation phase, post-construction and report making. Through engine performance test results obtained as follows: 70 watt wiper motor capable of rotating a load of 10 kg with a 72 rpm rotational speed. Gear transmission can reduce rotation from 180 rpm to 72 rpm. The temperature control unit can regulate temperatures from 500 C to 2500 C, while the rotation speed control unit can set the speed from 10 rpm to 72 rpm.
Microbottle-Resonator Ethanol Liquid Sensor
Authors: Johari M A M , Rosol A H , Baharuddin N A , Khudus M I M A , Jali M H , Maslinda M S , Jaapar S S , Harun S W 
Published: July 2020

Abstract
This investigation studies the use microbottle resonator (MBR) as ethanol liquid sensor. This resonator made-up from silica fiber SMF28 using process recognized as “soften- and-compress” to form bottle structure with a diaphragm diameter Db = 170μm, stem diameter of Ds = 125μm and bottle length Lb = 180μm. The MBR characterized by via 3μm tapered microfiber and bright to have >104 for the quality factor value (Q-factor). The MBR was formerly used as ethanol liquid sensor for the range between 10% to 100% and compared with non-MBR microfiber for wide-ranging performance. The MBR sensor was initiate to have a sensitivity 0.1756 dB/%ppm with linearity 99.28% and standard deviation of 3.355 dB, which was exceptional compare to the non-MBR microfiber in all limitation measured.
Formulating an Anorganic Membrane Using Clay, Activated Carbon and Micro Zeolite as Filter Media for Peat Water Purification
Authors: Nahar N , Saifuddin S , Sami Muhammad 
Published: July 2020

Abstract
Peat water is surface water in swampy or lowland areas that has a high color intensity, low pH (3-5) and strongly metals’ bonded. In proper treatment, the existence of peat water can meet the needs of the surrounding community. Additionally, keeping clean water or drinking water can be helped by the alternative treatment of peat water. Peat inorganic ceramic membrane which can be in accordance with water quality based on the Regulation of the Minister of Health of the Republic of Indonesia Number: 492 / Menkes / Per / IV / 2010. Ceramic membrane made from clay and modified with activated carbon and zeolite in such way turned out to be able to produce drinking water in accordance with drinkable water standards. This study aims to determine the membrane’s ability to treat peat water and determine the magnitude of turbidity reduction, total dissolved solid (TDS), pH, Fe and Mn and E. coli bacteria. This research was carried out by filtering peat water through the membrane. Membranes was made of tubes with specifications used are 7 cm high and 6.8 cm in diameter and 0.8 cm wide with various mixture of clays, activated carbon and zeolites. The compositions are 80; 10; 10; 70; 20; 10; 60; 30; 10, 50; 40; 10, respectively, and 140 mesh active carbon size variations. After the investigation, it turns out that all of the composition 80; 10; 10 (clay: activated carbon: zeolite) with a combustion temperature of 800°C is the best membrane removal result that produces standards drinkable water content with clear color intensity.
Methodology of ecological and geological assessment of technogenic oil product deposits (on the example of the territory of the Burnakovsky lowland, Nizhny Novgorod)
Authors: Izosimova O S , Podlipsky I I , Zelenkovsky P S , Lebedev S V , Belyaev A M , Dubrova S V , Kriyt V E , Sladkova Yu N 
Published: July 2020

Abstract
The present study is devoted to the assessment of hydrogeological conditions in the field of discharge of the water-bearing horizon. The study is carried out on the territory of the Burnakovo Lowland tank farm, Nizhny Novgorod, and the adjacent areas. These areas are potentially adverse areas with disturbed surface runoff conditions. Within these anthropogenically modified areas of megacities, there is pollution due to additional infiltration nutrition. In this case, it is possible to form a layer of liquid oil products on the surface of the water-bearing horizon and subsequent migration of pollutants within the catchment areas of rivers and water bodies.
Problems of evaluating the stressed state of welded joints of offshore fixed platforms of type “jacket” through the example of the Black sea region
Authors: Starokon I V 
Published: July 2020

Abstract
Offshore stationary platforms are actively used for oil and gas production on offshore fields in the world. Thus only in the Gulf of Mexico, approximately 4,500 such structures are used. Actively offshore stationary platforms are used by Norway, Azerbaijan, Iran and other Persian Gulf countries, China, Brazil, the USA and many other countries. The offshore platforms considered in the article are structures welded from pipes of various diameters. These platforms are affected by wind, wave and other loads, which cause them to vary in direction and magnitude of voltage. The article analyzes methods for calculating stress values for welded joints of platforms. Based on these methods, the author carried out numerical and analytical modeling of the stress state of the welded joints of the offshore stationary platform, obtained practical results on the example of a “T” type welded joint
Estimation of efficiency of the thermal diagnostic method for detecting corrosion defects of fixed offshore platforms
Authors: Starokon I V 
Published: July 2020

Abstract
Currently, the world is actively developing offshore fields. This production is carried out using fixed offshore platforms. During operation, offshore platforms are exposed to various influences, including corrosion. As a result of this effect, caverns are formed on the surface of the structural elements of the platform, which are stress concentrators and capable of causing critical overvoltage of the platform elements. To prevent this situation, it is necessary to identify hazardous corrosion defects in a timely manner. The article describes a comparative analysis of modern non-destructive testing methods, as well as the results of a method developed by the author on the basis of experimental studies for assessing the depth of corrosion defects.
Experimental research of electrical loads in residential and public buildings
Authors: Soluyanov Y I , Fedotov A I , Soluyanov D Y , Akhmetshin A R 
Published: July 2020

Abstract
The Association “Roselectromontazh” conducted a study of electrical loads for residential and public buildings in the Republic of Tatarstan showed that actual electrical loads are 1.5 - 2.5 times lower than in regulatory documents. Recently constructed cable networks and transformer substations of 0.4 / 10 kV in fact turn out to be underloaded. Moreover, this underload is such that most of the transformers rarely operate at 30% of their capacity during hours of maximum power consumption. The calculation of electric load is the basis for designing the power supply system of any capital construction facility. According to the open joint-stock company “Network Company” and with the support of the President of the Republic of Tatarstan, the Association “Roselectromontazh” carried out an experimental study on updating the requirements for calculating electricity consumption in public and public buildings of the Republic of Tatarstan. The actualization of electrical loads will lead to a significant economic effect by reducing the declared capacity and accordingly the power and number of power transformers reducing the cross-sections of power cables and consequently, capital costs during construction and operation.
Implementation of wireless data transmission method on wells equipped with sucker-rod pumping units
Authors: Bikbulatova G I , Galeev A S , Valitov M Z , Sabanov S L , Boltneva Y A , Shipilova O A 
Published: July 2020

Abstract
When operating wells equipped with SRP units, the parameters of the products are monitored mainly via a wired communication channel in close proximity to the bottom by means of sensors. In the course of the work, it was found that, despite the large number of proposed scientific and engineering solutions, the objective of creating a reliable wireless electromagnetic channel connecting to the well bottom along with a configuration for its implementation is urgent, especially as far as the practical implementation is concerned. A distinguishing feature of the engineering solution proposed is data transmission via a galvanic communication channel in the course of well operation, involving the electric current excitation in the metal string in a well using the ground generator with one terminal connected to the ground part of the metal string and the other one to the pickup electrode on the well surface; switching dielectric loading, splitting the metal string in the downhole into the top and bottom parts, and data receipt from the well bottom depending on the ripple caused by the switching of the dielectric loading, where the data transfer phase synchronized with the upward lift of the rod string providing the possibility to use the feedback in order to track the cycle duration with a constant voltage on the dielectric splitter.