bluuebunny/crossref_metadata_2025 huggingface dataset:
Aircraft icing nowcasting technique
Authors: Zuev V V , Mordus D P , Pavlinskii A V
Published: December 2020

Flight safety depends on a number of meteorological factors, including icing. Forecasting of aircraft icing implies taking into account only the meteorological conditions; therefore, “icing possibility” is forecasted. The next step in forecasting techniques is a technology of predicting the current state of weather — nowcasting. This technology requires continuous input measurement data with small time steps. These requirements can be met by using atmosphere remote sensing. A new methodology is proposed for detecting possible aircraft icing areas, which is based on remote measurement of air temperature profiles in the lower kilometer layer and the total vapor content of the atmosphere. The total vapor content is measured using an RMS-1 radiometric system. The data series of air temperature profiles and the total vapor content of the atmosphere in the area of St. Petersburg airport (Pulkovo) are analyzed for the period from November 2018 to March 2020. The distribution patterns for temperature and total vapor content typical for the onset of icing are determined.
Horizontal Structure of Banda Eddies and The Relationship to Chlorophyll-a During South East Monsoon in Normal and ENSO Period on 2008-2010
Authors: Horhoruw Selfrida Missmar , Fadli Muhammad , Atmadipoera Agus , Lekalette Johanis , Nugroho Dwi Y. , Tatipatta Willem M. , Kainama Ferdimon
Published: December 2020

Banda Sea is part of Indonesia Fisheries Management Area (WPP 714) which famous for Tuna fisheries. In addition to being influenced by Indonesian Through Flow (ITF), the Banda Sea also influenced by eddies. Banda eddies and the relationship to chlorophyll-a were studied by using the output of ocean circulation model produced by INDESO (Infrastructure Development of Space Oceanography) project in Ministry of Marine Affair and Fisheries. Data from 2008 to 2011 during normal phase of South East Monsoon period (June-August 2008), El Nino phase (June-August 2009), and La Nina phase (June-August 2010) were used. The model results showed two clockwise eddies in the northern of Banda Sea and three counterclockwise eddies in the southern of Banda Sea. The clockwise eddies were found at 20 meter depth and induced upwelling in south water of Buru Island, Ambon Island and Lease Island (Haruku, Saparua and Nusalaut Islands). Otherwise, counterclockwise eddies in the southern of Banda Sea (north of Wetar Island and Yamdena Island) generate the downwelling. High vorticity value of the eddy was found in the northern of Wetar Island. The presence of Banda Eddies on South East Monsoon period play an important role to maintain the water mass balance in the Banda Sea. Eddies also have strong influence on nutrient sinking from the surface of water. In addition, the eddies vorticity increased during the La Nina period and lead to low surface chlorophyll-a in the surface of the Banda Sea.
Nutrient, Macroalgae, and Echinodermata distribution in Northern Ambon coast during 2017 until 2018
Authors: Prasetyo Dhimaz Galih , Abdul Malik S. , Ikhsani Idha Y. , Rajab Abdul W. , Arfah Hairati , Putri Mutiara R. , Purnaningtyas dan Dayu W.
Published: December 2020

Northern Ambon Coast has a unique characteristic in term of biodiversity, including Macroalgae and Echinodermata. This research aims to determine the distribution of nutrients in the territorial waters of North Ambon in 2017 and 2018 and their effects on the distribution of Macroalgae and Echinodermata. Seawater samples were obtained in 26 sampling points in 2017 and 18 sampling points in 2018. Chemical parameters from seawater samples were determined by using a UV-Vis spectrophotometer and pH meter. The results of the analysis show that the average concentrations of NO3, PO4, and SiO2 in the study area in 2017 were 0.090 mg/L; 0.042 mg/L; and 0.330 mg/L with an average DO and pH content of 5.83 mg/L and 8.19. The average concentrations of NO3, PO4, and SiO2 in the sampling area in 2018 were 0.028 mg/L; 0.021 mg/L; and 0.129 mg/L with an average DO content and pH of 7.54 mg/L and 7.64 mg/L. The results shows that nutrients concentration on the Northern Ambon coast exceeds the maximum threshold that has been determined by 2004 Decree of the State Minister of the Environment No.51, but still sustains the life of the biota. Decrease concentration of the nutrients leads to the variability of macroalgae and Echinodermata observed in the study area in 2018 when compared to 2017. The Macroalgae classes that can be found in this area are Rhodophyceae, Phaeophyceae, and Chlorophyceae. Furthermore, the Echinodermata classes found in this area are Holothuroidea, Ophiuroidea, Asteroidea and Echinoidea.
Identification of Thermal Front in Indonesian Waters During 2007 – 2017
Authors: Jatiandana Afif Prabowo , Nurdjaman Susanna
Published: December 2020

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 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

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

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

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.
The measurement of customer satisfaction towards the service quality at xyz wholesale by using fuzzy service quality method
Authors: Fajri Hasibuan Chalis
Published: December 2020

The service quality is the most important factor for the company, in order for the company can keep running and developing. The ways to improve service quality are to find out and understand the customers’ desires. The quality service happens when the services or products meet the customers’ expectations. This research was conducted at XYZ wholesaler to find out the quality service level and propose the attributes that need to be improved the quality of services. Furthermore, based on the gap value per attribute that needs to be prioritized by the grocery to being improved was the support facilities distance and the shopping area obtained the highest gap value of -4.08. Whereas the lowest gap value was in grocery location is 2.33. This matter showed that the grocery location was the attribute rated by the customers better than the other attributes. While based on the value per dimension, the dimension that needs to be prioritized by the grocery to being improved was the empathy dimension which obtained the highest gap value of -2.20. Whereas the lowest gap value was the assurance is 0.05. It showed that customer’ assessments towards the assurance dimension better than the others dimension
Effect of passenger presence towards driving performance level using kss and cnc indicators
Authors: Mahachandra M , Prastawa H , Mufid A H
Published: December 2020

Passenger presence does affect car driver performance while driving. However, a different type of conversation between driver and passenger might bring different effects on the performance. This car driver’s performance can be measured by the level of sleepiness and the number of accidents experienced by the driver while driving. The level of sleepiness was obtained from the measurement of the driver’s alert level using the Karolinska Sleepiness Scale. Furthermore, the number of accidents was obtained from the measurement of the performance level using the Crash-No Crash indicator. This study applied three experiments on a car simulation, i.e., drive alone, drive with a passive passenger, and drive with an active passenger. Results showed that driving alone experienced the highest level of sleepiness than others while driving with active passengers experienced the highest number of accidents than others.
Detection system and security monitoring of the storage room of liquid oil gas with zoning method
Authors: Syofian Suzuki , Guswan  , Setiyaningsih Timor
Published: December 2020

Fires often occur due to leakage of the Liquid Petroleum Gas (LPG). Fuels in gaseous forms produce layers due to condensation with a negative effect when evaporated in free air. Fire usually starts with a small spark before inflaming largely. The frequent fires in homes and industrial sites that use LPG gas leads to huge losses of material and life. Therefore, cellular communication technology helps to facilitate the provision of information associated with the fire quickly. Communication is through voice and video calls, as well as via chats using the Telegram application, which provides bot system features from various cellular devices. With the zoning method, each signal sample of the communication is converted and characterized into a data vector with a fast calculation process. The result showed that the input data in the form of captured signals, extracted and processed, produces an output in the form of a warning or notification. Therefore, the application is expected to minimize the occurrence of fires.
Design of planning model for ERP system in warehouse management: an empirical study of public hospital in Indonesia
Authors: Utami F D , Puspitasari W , Saputra M
Published: December 2020

Public Hospital is one of the complicated information in the healthcare industry. ERP provides a concept that integrates a whole series of business processes, so they are mutually sustainable as part of business management to achieve the goals of an organization. In line with the hospital’s information system, ERP provides a solution for managing data information that runs in hospitals. As one of District Government Hospitals in Indonesia that provide health services, RSUD XYZ does not have an independent information system that manages the hospital’s vital data specifically in warehouse management yet. Procurement and management of goods on a regular basis without a system managing in terms of inventory bring through redundancy, ineffective, and inefficient management of data in the warehouse. This research focuses on the planning model system for the public hospital in inventory management business processes, developed using OpenERP at Inventory Management module and QuickStart method. The results of this study is a design of a planning model for inventory management system in the public hospital. This research explains how the ERP system can help improve health services in the public hospital under business processes that should be in the healthcare industry.
Study the use of shared power supply in mobile telecommunication station in Indonesia
Authors: Budiman B , Farizal F , Gabriel D S
Published: December 2020

Increasing need of telecommunications and fierce business competition makes telecommunication tower providers try to continue the improvement of their competitive advantage. Improving telecommunications services by providing telecommunications towers or base transceiver stations, is something that must be improved in order to meet the communication needs in Indonesia. Hence, improving network infrastructure is something that must be done to meet the changing times. Of course, in the context of improving network infrastructure, investment costs are one of few significant factors. Each telecommunications company must continue to innovate, so that network infrastructure can be improved with lower investment costs. In this study, we propose infrastructure sharing model of its power supply in order to reduce capital expenditure for Mobile Network initial investment. It is expected that the proposed model can be useful as a new business scheme for tower providers and operators for business development in the field of telecommunications infrastructure, particularly in accelerating the growth of BTS devices in Indonesia. In addition, the purpose of this research is to meet the increasing needs of telecommunications network users in Indonesia and to improve the business competitiveness of each network infrastructure provider and to improve the quality of Indonesian people in communication.
Evaluation of power plant reliability using index loss of load in the Suralaya power plant
Authors: Ferro Ferdinant Putro , Nurdiana Laila , Irman Ade
Published: December 2020

Suralaya Power Plant (SPP) is the largest capable electricity generation company in Indonesia, with a total installed capacity of 3400 MW. As the largest power plant in Indonesia, SPP holds a great responsibility as a supplier 17% of the electricity needs of the Java, Madura and Bali (JAMALI) systems. This makes the SPP also one of the national vital objects (Obvitnas). This paper will calculate the reliability index of the generator using the method of loss of load probability (LOLP) and loss of load expectation (LOLE) based on the value of the force outage rate (FOR). Based on data on failure and daily expenses in 2019, the reliability index of SPP for units 1-4 is 4,23 days per year or 1,23%. The higher values LOLP/LOLE are in 2019 are possibility of SPP has lost its burden for 2 days in a period of 2019 because of force majeure (blackout) which causes a reduced load. To improve power plant is that the electricity load in West Java can be fulfilled with the electricity flow.
Sentiment analysis of tokopedia application review to service product recommender system using neural collaborative filtering for marketplace in Indonesia
Authors: Meifitrah Restu , Darmawan Irfan , Nurul Pratiwi Oktariani
Published: December 2020

Tokopedia is one of the leading e-commerce companies in Indonesia and ranks second in the top 10 e-commerce in Indonesia in 2018 based on Statista data. Large companies like Tokopedia need to find out what users think of the products or services offered. User opinions on the Tokopedia application can be seen in the review column on the Google Play Store, but processing a review is not easy. To overcome this we need a sentiment analysis method or technique. Sentiment analysis is performed using the Naive Bayes algorithm. The results of positive sentiments obtained are used as a reference to maintain service quality and the results of negative sentiments can be used as an evaluation material in improving Tokopedia services and applications.
Food production performance measurement system using halal supply chain operation reference (SCOR) model and analytical hierarchy process (AHP)
Authors: Fauziyah I S , Ridwan A Y , Muttaqin P S
Published: December 2020

Food and beverage companies should be able to maintain and measure their performances to survive while the business competition condition is very dynamic. This study was conducted to design a performance measurement system for food production that combines the halal factors in its business process. Halal means authorized, legal, permitted, and allowed to any object or activity that is used or implemented in Islam. Therefore, designing and measure the performance in this study will use the Supply Chain Operation Reference (SCOR) model and Analytical Hierarchy Process (AHP). By using the SCOR model, we will get performance metrics that serve as indicators to observe and maintain the company’s performance. Meanwhile, by using AHP, we will get the importance weight of each metric toward the company’s performance score. The results of this study obtained 15 metrics with 3 halal metrics. The 15 metrics are divided into three performance attributes, which are 5 metrics in the reliability attribute, 9 metrics in the responsiveness attribute, and 1 metric in the cost attribute. The results of the overall performance score is 72.73. Those metrics are useful to maintain and improve the company’s performance.
Framework of risk priority and risk mitigation approach for palm sugar reverse supply chain
Authors: Ummi N , Marimin  , Noor E , Iskandar A
Published: December 2020

In the distribution of the palm sugar Supply Chain (SC) from producers to consumers, there are many palm sugar products quality damage, so a Reverse Supply Chain (RSC) activity is needed to minimize the loss and possible rocessed. There are some risks that occur in the RSC activities of palm sugar agricultural industry. The purpose of this study was to design a risk priority framework and risk mitigation as a reference for implementing RSC risk management in the palm sugar industry. The steps in the implementation of this research were the data and information collection, descriptive analysis, category selection, content evaluation and subsequently creating a framework. Approaches and methods for minimizing RSC risk based on the order of risk priorities and risk mitigation strategies were done by using Hybrid Interpretive Structural Modeling (ISM) - fuzzy Decision Making Trial and Evaluation Laboratory (DEMATEL) and House of Risk (HOR) 2. The results showed that the risk priority framework and the risk mitigation strategy are carried out through four stages starting from risk identification, risk classification, risk priority determination, and risk mitigation strategies.
Risk factors for rear-end collision: a systematic literature review
Authors: Saffanah Didin Fatin , Iridiastadi Hardianto
Published: December 2020

Crash accidents on Indonesia toll road in 2019-2020 as much as 61% of accidents were a type of rear-end collision. That occurs at least two vehicles that act as crashing cars and cars in the hit, resulting in economic and social losses. There is not much research in Indonesia that discusses related to the disaster behind the run. The purpose of this review is to investigate human aspects while driving and gain potential development possible to reduce the rear-end collision. Search engine in this study is Science Direct, PubMed, Taylor & Francis Online, and IEEE. Once obtained, 826 articles carried out the process of checking, and the appropriate characteristics in this study, the result was 13 articles, further conducted a thorough review. Rear-end collision happened because of the contributions of one or all of the risk factor groups factors that have strong evidence (p < 0.001 or OR> 3), including drivers, vehicles, and the environment. This study will increase alertness to the risk factors of rear-end collision on toll roads. Future research intervention can use music, and the traffic density of the driver’s domicile provides an effect on the behavior of drivers who drive with the type of minibus vehicles.
Exploiting online customer reviews for product design
Authors: Pasmawati Yanti , Edy Tontowi Alva , Hartono Budi , Wijayanto Titis
Published: December 2020

Online customer reviews (OCRs) are the text features of a consumer feedback on the crowdfunding platform. Utilization of OCRs as online survey provide an opportunity to obtain extensive and fast data about product information, experience of use and services. OCRs can be important information to identify consumer desires for a product design. This research proposes to utilize OCRs as input in developing products for start-up product. The object of this research is technology products. 34,006 OCRs were collected by scraping from kickstarter website. Opinion pros and cons are classified so as to produce 26,993 positive reviews and 13,203 negative reviews. extracted data use text pre-processing and Term Frequency-Inverse Document Frequency (TF-IDF) is used to select words through the classification of product design attributes. Our results show that the functional attributes and followed by aesthetics to be an important role in product design because these attributes have high reviews that customers consider when choice and buying products. More than that, the pros and cons based on relative value of product design reviews contained in online customer reviews are consideration for maintain and evaluate product design attributes. So that technology product produced by startup product can be successful in the online market.
Performance evaluation of yarn raw materials supplier using fuzzy data envelopment analysis approach (case study Batik Fabric Company in Sleman)
Authors: Indah Pratiwi Annisa , Sayuti Muhamad , Sukriyadi
Published: December 2020

Evaluating supplier performance by measuring supplier performance is an important thing by the company to optimize costs and time. This study aims to evaluate supplier performance and determine the best supplier based on predetermined criteria. This research was conducted on Batic Fabric company by taking research object suppliers of raw material for 40 CD and 50 CM yarn. This study used 4 criteria and 3 month period data. Evaluation of supplier performance using the Fuzzy Data Envelopment Analysis (DEA) approach, the Fuzzy method is used to carry out linguistic assessments, while for the assessment efficiency is used by the DEA method. The result analysis was concluded that the efficient suppliers for 40 CD yarns were suppliers PTX1, PMT1 and AG1. PMT1 is the best supplier which has the highest super efficiency value of 10.01565 while the 2nd rank is occupied by the PTX1 supplier with a super efficiency value of 1.633666 and the third rank is AG1 supplier with a super efficiency value of 1,488659 and other suppliers are inefficient: PMT1, SC1, PDT1 and AR1. For 50 CM yarn, the best supplier is PTX2 which has an efficiency value of 1, while other suppliers are inefficient: PMT2, DLT2, and DLR2.
Analysis and strategy of supply chain risk mitigation using fuzzy failure mode and effect analysis (fuzzy fmea) and fuzzy analytical hierarchy process (fuzzy ahp)
Authors: Lintang Trenggonowati Dyah , Ulfah Maria , Arina Faula , Lutfiah Chisti
Published: December 2020

PT XYZ is a company engaged in steel manufacturing and technical assistance. An example of the risk that occurs in supply chain activities in this company is that 8% of the total items experience delays in the Request Order (RO) to Purchase Orders (PO) in 2019. Currently, PT XYZ does not have supply chain risk management to identify and mitigate the risks that occur within the company. Therefore, this study aims to identify risks, determine priority risks and provide priority risk mitigation strategies that occur in the supply chain at PT XYZ. The method used is Supply Chain Operation Reference (SCOR), Fuzzy Failure Mode and Effect Analysis (Fuzzy FMEA) and Fuzzy Analytical Hierarchy Process (FAHP). The results of the study found 29 risk events and 4 priority risk events. Based on 4 prioritized risk events, the criteria which have the highest weight are the lack of the process of checking the raw material to be produced have a weight value 0.650 with the mitigation strategy carried out on the criteria is the lack of the process of checking raw materials to be produced is to adjust the demand documents and raw materials available. For the supplier performance criteria is not good to have a weight value 0.265 with the mitigation strategy carried out is conducting direct inspection to supplier company. The criteria for lack of coordination between companies and suppliers have a weight value 0.085 with the mitigation strategy carried out is to coordinate with suppliers. The lowest weighting criteria is the absence of project demand / tonnage forecasting processes with weights 0,000 and mitigation strategies carried out is to carry out project demand / tonnage forecasting processes.
Increased productivity using lean service (Case study: regional drinking water company x)
Authors: Kulsum  , Irman Ade , Anwari A.
Published: December 2020

Constraints found at the stage of requesting new connection services in regional drinking water company X is the slow administration and process of connecting pipes. This is following the average length of the new connecting service time of 8 working days from the target of 6 working days. The existence of these obstacles affects the productivity of the company. One indicator of increased productivity can be seen from the value of the Process Cycle Efficiency (PCE). The results of the PCE evaluation before the proposed improvement obtained the results of the current state PCE value of 14.98% and the percentage of PCE after the proposed improvement of 25.46%. after the proposed improvement is carried out, it reduces the processing time of the New Connection which was originally 10242 minutes to 6013 minutes.
Effect of Catalyst-Assisted Hydrothermal/Organosolv Process for Fractionation of Parawood
Authors: Srisuwansakda Araya , Srinophakun Penjit , Champreda Verawat , Suriyachai Nopparat
Published: December 2020

Fractionation of lignocellulosic components is a pre-requisite in biorefineries in order to separate the main compositions of raw material for further maximum utilization to biofuels, chemicals, and materials. Generally, a single step process is often insufficient to assure full availability of polymeric sugars from raw material. Therefore, the purpose of this study is to investigate two-step fractionation comprising hydrothermal and organosolv processes for the efficient separation of lignocellulosic biomass with a promising recovered yield in terms of quality and quantity. In this study, the effects of acids and bases concentration were studied in the two-step fractionation process, since they play different important roles in separation process. It was observed that the optimal condition of hydrothermal process was performed at 180°C for 60 min in the presence of 3.3%(w/w) of H2SO4 followed by organosolv process at 200°C for 60 min with 5%(w/w) of NaOH, resulting in the efficiency of hemicellulose and lignin removal of 87.96% and 46.39%, respectively. In addition, the high recovery of hemicellulose as pentose sugars were observed. The remaining cellulose was obtained with 80.22%. These results demonstrated the successive hydrothermal and organosolv process for fractionation of Parawood.