bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of personal integrated sterilization machine for new normal phase preparation of the 2019-nCoV outbreak
Authors: Hariono B , Mahanani R S , Nusantoro S , Kautsar S 
Published: April 2021

Abstract
The disease outbreak caused by the 2019-nCoV virus is growing so rapidly that the WHO has categorized this outbreak as a pandemic. In Indonesia, as of March 24, 2020, there were 686 patients who tested positive for the 2019-nCoV virus with 55 deaths. This has made the government extend the disaster period of the Coronavirus outbreak until the end of May 2020. Various efforts have been made by the Indonesian government, such as: opening emergency hospitals, implementing social distancing, and preventing viruses by spraying massive disinfectants. Disinfectant spraying is carried out using the help of a fire engine or using a spray device. Spraying of disinfectant is carried out on public roads and public spaces. Indonesia is starting to prepare for the new normal phase in the midst of the coronavirus pandemic which continues to infect millions of people in the world. The government has instructed that this new phase of normality can be well prepared. For the readiness of the new normal corona, the Ministry of Health and the Task Force for the Acceleration of Handling Covid-19 have compiled health protocols such as washing hands, maintaining distance, coughing, and sneezing ethics, and wearing masks. Based on the problem, an integrated sterilizer machine was developed. It can be used for workers during the New Normal phase. The machine is equipped with an automatic handwashing device, an automatic temperature gauge, and a UV booth for sterilizing goods carried by workers at Politeknik Negeri Jember.
The agronomy performance and resistance to brown planthopper on superior rice varieties in bali province, indonesia
Authors: Suastika I B K , Aryawati S A N , Suryawan I B G , Sari A R K 
Published: April 2021

Abstract
Research was conducted in Subak Guama, Selanbawak Village, Marga District, Tabanan Regency from January up to April 2017 and Subak Dlod Sema, Sading Village, Mengwi District, Badung Regency from January up to May 2017. This study aims to understand the growth, productivity and resistance to brown planthopper pest in superior rice varieties cultivated in Bali Province, Indonesia to substitute Ciherang variety utilization. Research were arranged by using Randomized Block Design with some superior rice varieties as treatment namely Inpari 30 and Inpari 40 for research in Tabanan Regency. And also, Inpari 16, Inpari 24, Inpari 28, Inpari 30, Towuti and Situ Bagendit for research in Badung Regency. Meanwhile, Cigeulis and Ciherang were utilized as comparison. Each of treatments were replicated for 5 times. Variable observed consisted of performance of agronomy and productivity namely plant height, number of tillers, number of grains per panicle, 1000 grains weight and yield. Besides that, resistance to brown planthopper pest also observed by evaluation of damage per plant caused by brown planthopper with using six scale standard of scoring. Results showed that Inpari 40, Inpari 28 and Situ Bagendit were resistant to pest of brown plathopper according to their percentage damage were 1%; 9% and 1% with scoring rate were 1; 3 and 1 respectively. Inpari 40 and Inpari 30 can be considered as candidate to substitute Ciherang according to their agronomy performance and productivity in Bali Province were closest similar to Ciherang variety meanwhile Inpari 40 was most suitable to substitute Ciherang variety according to its agronomy performance, productivity and resistance to pest of brown planthopper.
Exploration of agricultural waste as biochar to increase soil fertility of udipsamments in Jember district
Authors: Sugiyarto  , Salim A , Firgiyanto R 
Published: April 2021

AbstractThe problem in agricultural production activities that have been found in Jember district is the existence of agricultural land function experts with characteristics of productive land with good irrigation channels for various uses. Therefore, it is necessary to use marginal lands for agricultural extension activities, for example by utilizing coastal land with the Udipsamments soil type which has various eradicating factors for agricultural cultivation through the provision of soil amendment material in the form of biochar by utilizing agricultural waste. The purpose of this research is to obtain biochar raw material with high absorption power to store nutrients and a place to develop microorganisms; know the physical and chemical properties of biochar from agricultural waste. This research activity will be carried out from May to November 2020. This research activity begins by looking for agricultural waste that has the potential to be used as a biochar material. Through the pyrolysis process, selected agricultural waste is processed into biochar and then tested for its physical and chemical properties. The analysis results show that the selected agricultural waste can be used as biochar with sufficient quality as an ameliorant for Udipsamment soil.
Supporting organic rice exports: the success story of West Java organic rice exports
Authors: Saliem H P , Susilowati S H , Ariningsih E , Agustian A , Muksin  
Published: April 2021

Abstract
Organic rice has been developed in various regions in Indonesia, where West Java is the largest organic rice producing center. The organic rice market’s development trend has increased significantly from year to year but faces competition from other ASEAN countries. This study aims to formulate an export strategy for Indonesian organic rice, particularly West Java. The research locations are Tasikmalaya and Bandung Regencies. The survey was conducted in March-October 2018. Data and information were collected at the provincial and regency levels through in-depth interviews with respondents related to organic rice development, including farmers, administrators of farmer groups/farmer groups association, and traders. SWOT analysis was employed in processing the data and information. The analysis results show that organic rice exports are in the Strength – Threat (S – T) quadrant, which indicates that the organic rice export strategy has a decisive strength factor but faces significant challenges. The main strategy needed to encourage organic rice exports is to take advantage of the strength of support from the Regional Government in developing organic rice to overcome the threat of expanding organic rice from other producing countries with higher competitiveness.
Toxicity of sphagneticola trilobata extracts against spodoptera litura larva
Authors: Firmansyah E 
Published: April 2021

Abstract

Spodoptera litura is one of the polyphagous pests that cause damage to many agricultural commodities. Chemical control method was known as a major method use by farmers. Application of plant-based insecticide is an effort to decrease the negative effects of using synthetic insecticides. Sphagneticola trilobata is a weeds species which has potential to use as plant-based insecticides material. This study aims to determine the toxicity of S. trilobata extract in S. litura, as an effort to obtain alternative control materials that are more environmentally friendly. The material used is the leaves and flowers of S. trilobata extracted using water. The treatment concentration consisted of control, 20 ml / l, 40 ml / l, 60 ml / l, and 80 ml / l which were repeated 5 times. The application method used is the residual method on the leaves. Mortality data were analyzed using probit analysis to obtain a Lethal Concentration 50 (LC50) value. The results showed that flower extract was more toxic compared to leaf extract with LC50 value of 277.5 ml / l.
Optimization of energy efficiency in natural gas liquefaction process using plantwide control method
Authors: Biyanto T R , Cordova H , Matradji  , Priambodo K , Sarah A Z , Hermantara R C , Sitorus C D 
Published: April 2021

Abstract
The use of hydrocarbon energy is still very dominant, where the most efficient hydrocarbon energy is natural gas. In the process of distribution, natural gas must be cooled first to become liquid or commonly referred to as LNG. The natural gas liquefaction process consists of three parts, namely the propane cooling cycle by sea water, the MCR cooling cycle by propane, and the natural gas liquefaction cycle by MCR. The design of PWC on LNG aims to increase the efficiency of energy consumed so that the maximum profit can be obtained and to increase the plant stability when given disturbances. The results of the PWC design on a 5% increase in feed is able to reduce the energy use by 85,867,151 kJ / hour and increase the profit by 2,010,321,775 rupiah / day. While the 5% decrease in feed can reduce energy use by 96,297,243 kJ / hour and increase the profit by 2,254,511,068 rupiah / day. The application of PWC is able to produce a stable system response when a disturbance test is done, proven by the decrease of settling time and overshoot, also eliminating the steady state errors compared to PID control before using the PWC design.
Method for determining the loads on the deflection module of the push-the-bit rotary steerable system
Authors: Epikhin A. , Zhironkin V. , Szurgacz D. , Trzop K. 
Published: April 2021

Abstract
The article presents a method for calculating the loads on the blades - elements of the deflecting module of the push-the-bit rotary steerable system for directional drilling of oil and gas wells, affecting its reliability. It is shown that the reliability of rotary steerable systems is of particular importance as the development of unconventional oil fields expands - a highcost process that increases attention to specific factors of reliability of drilling equipment. A feature of the method for calculating the loads on the deflecting blades proposed by the authors is the representation of the rotary steerable system as an absolutely elastic rod, which is acted upon by a complex of forces arising from the directional wells with horizontal wavy segments. As a result of calculations, conditions were determined under which the interaction of forces acting on the deflecting blades will create a load close to the maximum permissible values, which increases the risk of failure of the entire bottomhole assembly of the rotary steerable system. The key condition was the change in the drilling segments of directional wells from ascending to descending when drilling a horizontal section with a wave profile, as a result of which there is a multiple load drop on the deflecting blades. Based on the calculated data, with an increase in the axial load, it is recommended to adjust the drilling mode to reduce the risk of failure of the push-the-bit rotary steerable system.
Liquidation of the exploration pit n. 11 from the Rozna uranium deposit, Czech Republic
Authors: Vokurka M. , Molinek O. 
Published: April 2021

AbstractThe aim of this article is to introduce the history, characteristics and liquidation of one of the first exploratory borings of the Rozna deposit in the middle of Czech Republic. Based on available characteristics of the main mine workings and the local geology a design of liquidation was created to fulfill the legislative framework of Czech Republic as well as possible. The design was then executed by backfill with unconsolidated rock material and subsequently by securing the surface pit mouth of the main mine workings by closing sinking platform placed on micropiles. The finishing works included modifying the surroundings of the exploration pit by land machinery and smoothing the previous mining activity down, so that it doesn’t disturb the local morphology.
Improving the control system of concentration plants based on express control of dissemination of magnetic minerals
Authors: Chumakov A. , Prischepov V. , Melekhina K. , Ivannikov A. 
Published: April 2021

Abstract
One of the most important issues of the process control system is the quality control of the ore charge by averaging it over the material composition, which will improve the quality and quantity of the processing plant due to the stabilization of the properties of the raw materials. However, there are no methods for express control of the size of grains of productive minerals, which affect the extraction rates. Obtaining operational information on dissemination will increase the control of the technological process of ore preparation due to the operational control of the grinding process. Obtaining operational disseminated information can be achieved by measuring the electrical and magnetic properties of the ore. This article is devoted to express control of dissemination of magnetic minerals based on a comprehensive measurement of the magnetic characteristics of the ore flow. As the research part of the study was conducted within a training period, some remarks concerning educational value of joined research program are expressed in final remarks.
A rational approach to the management of underground mining in complex hydrogeological and geomechanical conditions based on a risk assessment
Authors: Krasyukova E. , Aynbinder I. , Ivannikov A. 
Published: April 2021

Abstract
The problems that arise during the combined development of vertical and subvertical ore bodies under complex hydrogeological and geomechanical conditions are considered, and their influence on the safety of mining operations is analyzed. In the course of the research, using the example of kimberlite deposits in Yakutia, new mechanisms were identified and spatial patterns were established for the development of processes of deformation, displacement and destruction of ore and rock masses during preparatory excavations and treatment works near surface and underground water bodies, including high-pressure ones. The mechanisms of complex accounting of the structural state of the massif, preliminary technogenic impact, the effect of complicating mining and geological and hydrogeological factors in substantiating the parameters of hazardous zones and barrier pillars are proposed. Risk assessment method based on hazard identification, a qualitative and quantitative analysis of the likelihood of an emergency considering the severity of the consequences when conducting mining in hazardous areas is presented. The application of the method in combination with the timely adjustment of technological processes provides a rational integrated use of geo-resources in the framework of sustainable development of mining system. The experience of training young personnel for scientific research institutes is described. Starting with university education and ending with their participation in real design work.
Preventive measures to minimize natural hazards in the Polish underground mining industry
Authors: Trzop K. , Palka D. , Szurgacz D. , Sobik L. 
Published: April 2021

Abstract
The process of underground hard coal mining and various types of natural hazards are inextricably bound up with each other. The occurrence depends on the response of the rock mass to the disturbance of its balance caused by mining activity determines the occurrence of natural hazards that can lead to a series of events that significantly disturb the safety and efficiency of the entire coal production process. Consequently, there is a constant search for methods that would support the available preventive measures. There are several solutions that can be applied during the mining process designed to either limit the frequency of hazards and/or limit their consequences. The paper reviews the current natural hazards in underground mining with particular emphasis on their consequences. Based on the experience of the authors and the review of papers that deal with natural hazards, possible solutions were analysed to reduce the potential for events associated with these hazards and their consequences. The research team focused mainly on preventive measures. The protection of human health and life was a key priority. It is also important to ensure continuity of exploitation and its economic efficiency, and to reduce the negative impact on the environment, the operation, working conditions, and mining costs. The analysis of the existing hazards and the possible ways of limiting their negative effects should improve work safety and the efficiency of the entire mining industry.
Stope stability assessment by the Mathews–Potvin method: a case-study of open stoping in salt rock mass under conditions of secondary stress field
Authors: Khazhyylai Ch. V. , Kosyreva M. A. , Eremenko V. A. , Umarov A. R. 
Published: April 2021

Abstract
Predicting the stability of open stopes is a challenging task for underground mine engineers. The introductory part of this paper presents main issues related to stability and safety of soil and rock mass in course of large earthworks and underground works. On the basis of former studies, this paper reviews the research findings on stope stability by the methods of Mathews and Potvin in the stoping design for rock salt mines operating at depths greater than 1 km under conditions of secondary stress fields, as well as the rock mass quality assessment by Barton’s method. The conservative stope design has been performed for a few scenarios of design parameters. In conclusions, it is underlined by the stability graph at the given parameters, that in the first case-study scenario, HR is 4.5 m and the Mathews–Potvin stability number is 68 m. It is concluded that the stopes will be stable and preserve their shapes. On the basis of presented case study (stope stability assessment in the test halite–polyhalite–polymineral salt deposit was carried out for a few scenarios at maximal effective stresses and under conditions of jointing), the authors provide the general provisions on salt rock mass assessment at great depths.
Underground hard-coal mine as a hosting facility for a data processing center infrastructure
Authors: Varnavskiy K. , Nepsha F. , Kostomarov R. , Chen Q. G. 
Published: April 2021

Abstract
The paper discusses the possibility of using the coal mines infrastructure for hosting the data processing centers (DPCs). Modern technologies allow to consider the power supply system of a coal mine being sufficient to fulfill the high requirements of power supply reliability for DPCs. For this aim, the authors proposed the ”coal - energy resources - information” concept with respective structure of energy supply. As a means of increasing energy efficiency, it is proposed to use cogeneration and trigeneration on coal mine methane which allows to provide power supply to power consumers, heat supply to a coal mine and cold supply to a data center. The technical risks associated with the use of DPCs and trigeneration in coal mines were identified, providing basis for future research. In the conclusion, it was noted that the development of DPCs integrally with coal mines can increase economic efficiency, as well as create new workplaces and become a driver for the development of the IT industry in mining towns.
Method for determining the traction force of the ground cable car drive
Authors: Chezganova D. V. , Muradov I.V. , Zhaglovskaya A. V. 
Published: April 2021

Abstract
The article is devoted to the problem of determining the necessary indicators of the traction force of the ground cable car drive, in the modes of start - up, steady motion and braking when operating them in curved workings with a variable path profile. Therefore, for each case of using a cable car in the mine, the required amount of traction must be calculated based on the specific values of the cable car profile parameters and the curvature of the path in the horizontal plane. The method of determining the traction force given below allows you to calculate the required traction force based on the design data of the ground cable car for specific operating conditions. To calculate the traction force, all the resistances to the movement of the composition of the trolleys and the traction rope are determined.
An overview of torque meters and new devices development for condition monitoring of mining machines
Authors: Zietek B. , Krot P. , Borkowski P. 
Published: April 2021

AbstractCondition monitoring and diagnostics of minerals mining machines is a challenging task for operating companies and their maintenance staff. Conventional approaches based on measurements of vibration, temperature and other parameters are still not widely implemented in the mining industry due to non-stationary loading conditions. Registration of overloading and resonance modes is not sufficient by the electrical motors current in case of heavy mobile vehicles or stationary mounted mining machines having multi-body structure. Telemetric torque measurement tools installed in the drivetrains of mining machines allow accounting the variation of loads and gives valuable information on damages in geared transmissions. This paper represents the different methods of torque measurement and digital telemetry device under development based on strain gauges. The focus is on the functionality required for industrial applicability and issues in course of machines operation and maintenance. The additional features, which the torque meters afford for mining machines diagnostics, are considered.
Analysis of ammonium and phosphates concentration time series in river water
Authors: Drozdov I. Yu. , Aleksakhin A. V. , Aleksakhina Yu.V. , Petrusevich D. A. 
Published: April 2021

Abstract
The Ammonium prediction in river water and the Phosphate prediction in river water datasets (provided by the Ukrainian government) have been handled. The ARIMA (p, d, q) model of low order (p<5 and q<5) and high-order models (p>4 or q>4) have been constructed to describe behaviour of concentration time series at different river stations. Orders and coefficients in the first case are obtained via information criteria minimization. In the second case the ACF and PACF functions analysis is used. The ArDL(p, q) models are used to investigate correlation between concentrations of ammonium and phosphates at different river stations. Dependence of these parameters at the target water station and at other stations is confirmed with statistical tests. Conclusions about water pollution are made.
Methodology for calculate bearing capacity of soft soils under cyclic loading
Authors: Lazcano D. R. Panique , Aires R.Galindo , Maraón C. Olalla 
Published: April 2021

Abstract
The bearing capacity in soft soils under cyclic loading has not been widely studied as the static bearing capacity. In soft saturated soils under cyclic load, the phenomenon of cyclic softening occurs, this consists of an increase in the generation of pore-water pressure due to the cyclic load and a decrease in effective soil stresses. The purpose of this work was to propose a methodology for calculating the bearing capacity in soft soils under cyclic loading. The research is based on the results of monotonic and cyclic simple shear tests carried out with samples from the PRAT port of Barcelona. From an analysis carried out on all the experimental data, an equation for the generation of pore-water pressure is proposed. This formulation was implemented in the FLAC2D finite difference software and is part of the methodology. The methodology of the proposed calculation process consists of 6 stages and verification under two criteria. This process is iterative in case of not meeting any of the two verification criteria. Under this methodology of the calculation process, charts are proposed to calculate the bearing capacity of soft soils under cyclic loading. This application takes into account the properties of the soil, the static bearing capacity (P he), and the effective load outside the foundation (q). Also, an analysis of the parameters that most influence the bearing capacity of soft soils under cyclic loading was carried out.