bluuebunny/crossref_metadata_2025_split huggingface dataset:
Identification of Thermal Front in Indonesian Waters During 2007 – 2017
Authors: Jatiandana Afif Prabowo , Nurdjaman Susanna 
Published: December 2020

Abstract
Indonesia is a region that is directly adjacent to the Pacific Ocean and the Indian Ocean which allows a thermal front phenomenon. The purpose of this study was to identify the presence of thermal fronts based on seasonal variations and inter-annual variations in Indonesia waters. The data used in this study were Sea Surface Temperature (SST), Ocean Nino Index (ONI), and Dipole Mode Index (DMI) from January 2007 - December 2017 (11 years). The SST data was a level 3 Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) satellite image data with a resolution of 4 km. SST data was analysed using remote sensing techniques and Geographic Information System (GIS). The results of this study indicated that the distribution of SST and thermal fronts were influenced by seasonal variations and inter-annual variations. The highest average thermal front event in Indonesian waters occurred in a combination of El-Nino and Positive Indian Ocean Dipole (IOD) conditions. The highest average thermal front incidence in Indonesian waters also occurred during the East Season, while the smallest average occurred during the Transition Season II. During West Season, Transition Season II, and East Season, the largest number of thermal fronts was found in Western Indonesian Waters. Meanwhile, in the Transition Season I, the largest number of thermal fronts was found in Central Indonesian Waters. Thermal fronts were often found when the SST of Indonesian waters were cooler than normal conditions. The cooler condition made the SST more heterogeneous and formulated the thermal front phenomenon.
Reverse logistics of municipal solid waste------Study on the Location of transfer stations
Authors: Hu Yajie , Yang Wensheng 
Published: December 2020

Abstract
Reverse logistics optimization design for recyclable municipal solid waste is a social and economic problem. This paper mainly studies the location problem of reverse logistics network transfer station, which involves how to select the most effective location from the set of points to be selected. In this paper, an improved P median location selection model is proposed on the premise of minimizing the impact on residents, and greedy extraction heuristic algorithm is adopted to solve the model. Finally, the effectiveness of the model in the construction of MSW reverse logistics site selection is illustrated through an example analysis, and theoretical reference is provided for the actual site selection problem.
Power quality monitoring system based on IEC61850
Authors: Yan Tingwu , Bai Tian , Jin Haipeng , Liuand Tao , Gao Ming 
Published: December 2020

Abstract
Power quality monitoring system is an important means to find and evaluate power quality problems in time. A service-oriented browser / server (B / S) mode active power quality real-time monitoring system is designed and implemented, which provides the real-time monitoring function of power quality in the process of active power distribution network absorbing distributed power generation layer by layer, and focuses on observing the impact of the change of power flow direction on the level of power quality. Based on IEC 61850 standard, the system establishes the power quality information model, and uploads the real-time monitoring data of power quality on site to the master station for analysis and storage in the real-time database through MMS. The client communicates with the server through windows communication base (WCF) service to obtain real-time monitoring data, and realizes the global real-time monitoring function of power quality of active distribution network combined with the main wiring diagram, so as to achieve the integrated display effect of data graph.
Study on analytical calculation method of water inflow in the tunnel of oblique crossing layered aquifer structure
Authors: Zhixiong Zhang , Yang Liu , Mo Xu , Yunhui Zhang , Yun Lin 
Published: December 2020

Abstract
Due to the complicated geological environment and karst hydrogeological conditions, water-inrush accidents often occur in the construction of tunnels in southwestern China. At present, there are many methods to predict tunnel water inflow, including analytic method and conventional hydrodynamic research method. There is a big discrepancy between calculated water inflow value and actual situation. Our research focused on the layered aquifer medium characteristics of water-bearing structure and movement characteristics. On the basis of existing tunnel gushing water inrush characteristics, the crossing relationships between tunnel and layered aquifer structure are divided into three categories, (I) tunnel longitudinal through layered aquifer structure, (II) tunnel through layered aquifer structure, and (III) tunnel obliquely crossing the layered aquifer structure. The revised formula of tunnel water inflow theory and experience in this study is inferred from steady-flow formula considering the boundary conditions. Inhomogeneous layered aquifer structure is considered as homogeneous structure, calculated by theory and experience formula. Next to the heterogeneity on one side of heterogeneity interface, the permeability coefficient of different strata can be fitted for a unified Kv; when crossing the layered water-bearing structure laterally, it is still calculated according to the original formula. When oblique crossing a layered water-bearing structure, the total flow rate is decomposed into two directions: transverse crossing and longitudinal crossing. The flow rates in the two directions are calculated respectively, and then superposed into the flow rates in oblique crossing.
Design of Internal Resistance Detection System for Retired Lithium-ion Batteries
Authors: Yang Haoyuan , Yang Shengbing , Liu Yihui 
Published: December 2020

Abstract
Aiming at the echelon utilization of retired lithium-ion battery, an internal resistance detection system based on pulse discharging was designed. Taking STM32F103ZGT6 as the MCU of the lower computer, the collection circuits of voltage and current are designed, and the internal resistance of the battery is estimated by the collected information. The upper computer operation software is compiled, and the test results are stored in the database, which is convenient for management and query.
A Low Frequency Oscillation Disturbance Source Positioning Method Based on Oscillation Phase Difference
Authors: Li Duo , Chen Xiaodong , Zhang Jun , Yu Hao 
Published: December 2020

Abstract
In the face of voltage sag which causes power quality problems, combined with the common short circuit fault types in power system, how to locate disturbance source quickly and accurately is an important problem in low frequency oscillation monitoring and control. The mechanism of the disturbance source affecting the unit in the network is analyzed. A low frequency oscillation source location method based on oscillation phase difference is proposed. Firstly, the electrical data of the dominant oscillation mode are extracted by empirical mode decomposition, then the oscillatory phase with physical meaning is calculated by Hilbert transform. According to the network information criterion, the location of the disturbance source can be traced, according to the power plant. The ground information criterion can check the specific disturbance source unit. The principle of the method is clear, only one electrical quantity is needed to participate in the calculation.
Research on Energy-saving Process Control Method of Bulk Cargo Terminal Based on Frequency Control Technology
Authors: Lu Dongqi , Shi Hankun , Wang Xuelin 
Published: December 2020

Abstract
The bulk cargo terminal conveying system has the problems of low equipment efficiency and high energy consumption during operating conditions such as no-load starting, ship loader shifting, and ship unloader clearing. In this paper, combined with the full frequency conversion control technology, the research on the frequency conversion control mode of the bulk cargo terminal and the energy saving effect test are carried out, and the optimized control method for the energy saving process is proposed. Under various common working conditions, the bulk cargo terminal can control the belt conveyor to run at low or zero speed according to the actual situation on the spot, so as to minimize energy consumption.
Voltage Adjustment of Distribution Network Including Distributed Power Based on Wide Area Information
Authors: Wang Mingjin 
Published: December 2020

Abstract
With the access of distributed generator, it changes the trend of the distribution network flow and voltage distribution. And the output power of the DG has the characteristics of randomness and interval, which can affect the control strategy of the transformer substation. In order to improve the influence of the distributed power on voltage, in this paper, based on the typical chain-shaped radiative distribution network, the influence of voltage distribution after the access of distributed generator is studied. On this basis, a coordinated control strategy based on wide-area information “bus voltage priority regulation, distributed power supply coordination regulation” is proposed, which takes full-line voltage reaching the standard as the optimization goal. Through the simulation of the improved IEEE 33-node distribution network, it is verified that the coordinated control strategy can effectively improve the power quality of the distribution network, and control the voltage deviation within the allowed range.
Wind speed spatial estimation using geostatistical kriging
Authors: Wang Yu , Wang Deji , Zhao Jianghai , Zhu Changan 
Published: December 2020

Abstract
Accurate wind speed prediction plays an important role in the planning and development of wind power plant. Wind speed prediction can reduce the impact of wind power grid connection and improve the control of wind power systems. In this study, wind speed is considered as a geographical variable. We firstly used exploratory methods to examine the spatio-temporal dependence on wind field. The variogram was taken into account in analysing the spatial structure in the rectangular grid. Then the exponential model was adopted to fit the anisotropic feature of variogram. The de-trended data have been computed by using a geostatistical kriging estimator. The results were compared with the leave-one-out cross-validation (LOOCV) method. The accuracy of the proposed method was verified to obtain the best estimated results.
Temporal and spatial distribution characteristics of ozone in Taiyuan City in 2018
Authors: Chuhan Wang , Yiluo Cai 
Published: December 2020

Abstract
To understand the spatial-temporal characteristics of ozone in Taiyuan, the ozone concentration data of Taiyuan National Control Point in 2018 were analyzed. The results show that, in 2018, the data of ozone as the main pollutant in Taiyuan did not exceed the annual average standard. The monthly distribution of ozone was inverted “V” and the highest average concentration appeared in July. The diurnal variation of ozone didn’t show an anti-weekend effect. In terms of spatial distribution, the difference between all the eight points was not obvious.
RETRACTED: Research on Operating Modes and Strategies for Creative Enterprises in Jilin Province to Resolve Survival Crisis in the Big Data Age
Authors: Ge Yingying , Yang Chen , Zhang Yichao , Zhu Hua 
Published: December 2020

Abstract
Creative enterprises are the backbone of the development of cultural and creative industries. This paper analyzes the current situation and crisis of creative enterprises in Jilin Province in the construction of cultural creativity and design service market in the era of big data, and puts forward some strategies to solve the crisis of enterprises so as to improve the core competitiveness of independent intellectual property rights of enterprises, to achieve the cultural and creative industry and other industrial integration and development, and accelerate the industrial transformation.
The effect of post-curing temperature on mechanical properties of coconut coir fiber reinforced polyester composite
Authors: Rizal S , Junaidi A , Gunawan I , Taufiqurrahman  , Nasution J D , Mataram A , Ilham A B , Afriansyah  
Published: December 2020

Abstract
This study used post-curing training as a method of strengthening. The smoking process was a process carried out in the form of heating the specimen at a certain temperature to improve the properties possessed by the composite. The purpose of this study was to study the effect of post-curing temperature on the impact strength of coconut coir fiber composites with temperature variations of 600ºC, 700ºC, 800ºC, 900ºC, 1000ºC. Specimens were prepared using a mixing method for mixing ingredients and a hand lay-up where in the composite volume fraction is prepared according to each specimen, which is 70% polyester and 30% coconut coir fiber. Each specimen is heated for 60 minutes in a conventional oven. Average impact strength and impact energy per unit area increases with the increase in post-curing temperature due to the fact that the movement of composites as well as the reduction of holes in the composites and adhesion to one another (suturing) can improve mechanical testing. The highest strength values obtained in the specimen with an increase in T = 100°C, ie 18,509 J for the average impact energy and 0,1434 J/mm2 for impact energy per unit area average.
Effect of gas pressure on conduit plasma atomization for fabricating spherical stainless steel powder
Authors: Dharmanto  , Supriadi Sugeng , Sunar Baskoro Ario , Suharno Bambang 
Published: December 2020

Abstract
In this study, spherical stainless steel powders are produced using the conduit plasma atomization. Parameters of the conduit plasma atomization process with gas variations of 1.5 bar pressure, 2 bar pressure, 2.5 bar pressure with 316L stainless steel raw material with a current of 25 Amperes, feed speed of 2 mm3/s. The results of stainless steel powders were observed using a digital microscope (Dino-Lite AM4115), scanning electron microscopy (SEM-FEI-Inspect F50), and energy dispersive spectroscopy (EDS). To ensure the purity of the resulting 316L stainless steel spherical powder, EDS was used for qualitative and quantitative elemental analysis. The results showed that the 316L stainless steel spherical powder particles varied in size from 35 µm to 140 µm, making them ideal for powders metallurgy application. The effect of gas pressure on the powder weight percentages for particle sizes 50 µm – 100 µm for 1.5 bar pressure, 2.0 bar pressure, and 2.5 bar pressure were 67.14%, 78.71%, and 81.73%, respectively. It is possible that this could happen because to break down molten metal into smaller size droplets, it is needed the kinetic energy of larger gas pressure. So that large gas pressure can produce more small particle size compared to small gas pressure.
Battery energy storage system as the optimal solution for underdeveloped, remote, outermost region: Pasi island study case
Authors: Yoesgiantoro Donny 
Published: December 2020

Abstract
Underdeveloped, remote and outermost (3T) regions are areas that are becoming the priority of development by the Government of the Indonesian Republic in strengthening national security. However, the constraints to development in the 3T region are immense, ranging from great distances, isolated areas to its geographical location in the mountainous area of even in small islands. Pasi Island is home to three villages that fall into the 3T area category. Battery ESS is an energy storage system in the form of giant batteries with many advantages, such as inexpensive, mobile, has a large capacity, long life cycle, easy to operate and zero waste. Seeing the advantages offered by the battery ESS so that it has the potential to be an optimal solution to meet the electrification ratio in the 3T region. Cost-benefit analysis is chosen because the results can provide a clearer picture of the costs and benefits going forward. So that the calculation of the resulting cost-benefit is more optimal then two calculation scenarios are used using the basic difference in electricity sales rates. In the first scenario, it uses BPP tariff for the Selayar Regency area of Rp 2,445, and in the second scenario, it uses the BPP tariff of Rp 3,041 for small subsystem areas. The calculation results indicated that the second scenario provided immense benefits with a short payback time. The NPV value generated by scenario II is 116.5 billion rupiah with an IRR percentage of 100.33% and a cost-benefit ratio of 9.332.
Numerical and experimental analysis of drag force in medium speed train design
Authors: Mario Jean , Halfina Beny , Bahtera Dimas , Shalahuddin Lukman , Windharto Agus 
Published: December 2020

Abstract
Aerodynamic drag is the highest portion of the overall resistance force in a high speed train. More streamlined design will have lower coefficient of drag. Therefore, improving the mask of car and carbody is essential to minimise the drag force. This study aims to obtain the value of the drag coefficient on the design of Indonesia’s Medium Speed Train which has an operational speed of 160 km/h by the numerical method and then to validate it with the wind tunnel experimental test. In the initial stage, two designs was developed using a 3D CAD software. Subsequently, a CFD simulation was performed to determine the value of the drag coefficient. Two test models were built with a scale of 1:25, then both were tested in a wind tunnel. Based on the test results, the coefficient of drag of both models have relatively similar value. The graph data from the CFD simulation results then compared to the wind tunnel results. In addition, the wind speed variations was conducted to observe the effect of the Reynolds number on the drag coefficient.
2-D modelling of effect of free-stream turbulence on trailing edge vortex
Authors: Syaiful  , Restue Saputra Anggie , Sinaga Nazaruddin , Yunianti Bambang 
Published: December 2020

Abstract
Abstract Vorticity causes many adverse effects on the area near the surface, both on moving (turbine blade) and fixed objects. Therefore, this study attempts to investigate the effects of free-stream turbulence on trailing edge vortex on the NACA 0015 airfoil profile. This research was conducted using two-dimensional numerical simulations. To determine the interaction of vortex and free stream turbulence, two variations of turbulent intensity were given, namely 0.5% and 4.6% with Reynolds number of 1.6 x 105. The k-ε turbulence model was used in the current study. The angle of attack of the flow towards the airfoil was varied from 0° to 25° in conditions of increase and decrease in the horizontal position of the airfoil. The result was found that there is an agreement between the simulation and the experiment result. Increased turbulent intensity can delay the stall condition, the stall process begins to be observed after the 12° attack angle at 0.5% turbulent intensity while at turbulent intensity 4.6% the stall process was found after the 15° attack angle. From a velocity streamline, it was found that an increase in turbulent intensity can inhibit vortex growth.
Making of nusantara decorative motif creations necklace based on hdpe on type plastic waste
Authors: Nur Indra Kusumawati Desiana , Wibisono Widyo , Wisnu Indra K 
Published: December 2020

Abstract
The problem of HDPE plastic waste from thick inorganic household waste that is difficult to destroy can damage the environment, the need for the utilization of HDPE plastic waste into products that are beneficial to humans. The purpose of this study was to determine the results of ornamental motif necklaces in the archipelago in accordance with the provisions of the aesthetic theory derived from HDPE plastic waste material that produces good quality so that it can attract consumers as users. The method used is a qualitative method based on the collection of literature data and information from the opinions of experts in their field of accessories to provide input or to the archipelago creation creations based on product theory and aesthetics. The results obtained are necklace products that have design elements derived from decorative motifs of the archipelago (Kawung and Tumpal) made from HDPE plastic waste that have benefits in fashion. The conclusion from the analysis based on theory and accessory expert opinion on the archipelago ornamental motif necklace especially kawung motif made from HDPE plastic waste can produce necklace creations that have good aesthetics and quality so that they can attract attention. consumers as users.
Management of information systems, implementation and their importance in Albanian enterprises
Authors: Prifti V , Markja I , Dhoska K , Pramono A 
Published: December 2020

Abstract
Management information system collects and processes data (information) and provides it to managers at all levels who use it for decision making, planning, program implementation, and control. In addition to the global studies of management information system, this paper will analyze similar cases in Albanian enterprises. Albanian enterprises strongly need management information systems and the facilities that they bring to their management ensuring a better functioning and higher performance of different enterprise processes. In this paper was taken the case study of the Microsoft Dynamics NAV system, the implementation in “Infosoft Systems” enterprise in Albania and the impact of NAV system in some of the enterprise departments. Implementation phase of management information system is one of the most important stages which starts with the organization of the information systems management department and ends with the procurement of the relevant software. To get more information we used a questionnaire which was designed and sent to some enterprises in Albania. The purpose of this questionnaire was to learn how many of them use management information systems, what type of information system they use and the advantages or benefits that the implementation of information systems brings to enterprises in Albania. As a conclusion, management information systems have contributed to enterprises to put in place better functionality, which leads to increased enterprise performance, increased profits, simplified work processes in different departments.
The implementation of lean construction and six sigma concepts in light brick installation: A case study in Cordova apartment project
Authors: Utami Handayani Naniek , Agung Wibowo Mochamad , Mustikasari Anita , Wahyu Nurwidanto Ilham , Akbar Dilaga Drajat 
Published: December 2020

Abstract
PT Adhi Perkasa Gedung is a construction company engaged in building construction that is a subsidiary of PT Adhi Karya (Persero). Sustainability has become a significant issue this decade, as well as construction projects. Construction companies are required to be able to manage their resources effectively and efficiently through the completion of environmentally friendly projects. PT Adhi Perkasa Gedung as the construction contractor for the Cordova Apartment, strives to minimize waste in light brick installation. The light brick is used as a bulkhead between rooms in the apartment. The problems that occur are the waiting time of light brick procurement, product defects, material handling, and installation process errors. The purpose of this study is to minimize waste in light brick installation using lean construction and six sigma methods. The results of this study indicate the existence of rework due to installation process errors, material quality.