bluuebunny/crossref_metadata_2025_split huggingface dataset:
The internet of things (iot) for flood disaster early warning in dki jakarta: prospect and community preparedness
Authors: Wicaksono A , Herdiansyah H 
Published: March 2021

Abstract
Flooding is the most frequent disaster in the last ten years in Jakarta and has occurred since the colonial era. Jakarta’s geographical location is partly below sea level, and its dense population causes Jakarta’s vulnerability increases. The study aims to determine the potential of use and development of IoT in flood disaster mitigation systems as an early warning to the public through cell phones, that have become the needs of the urban community to reduce material and non-material losses. This study uses data elaboration methods, using secondary data from the Central Statistics Agency (BPS) on the Information and Communication Technology Development Index (ICT Development Index) published in 2018, survey data from the Indonesian Internet Service Providers Association (APJII) on internet user profiles in Indonesia published in 2015. The results of this study indicate that internet penetration reaches up to 56%, the highest compared to other regions in Indonesia. The ICT Development Index shows that DKI Jakarta is the highest ICT Development Index, with 7.41 out of 10. It indicates that IoT based on flood disaster mitigation has the potential to be applied in DKI Jakarta.
Survival of urban people: lesson learn from kampung pahandut people, palangkaraya city
Authors: Hamidah N , Santoso M 
Published: March 2021

AbstractThe sustainability development is current issue in Indonesia. This research related to sustainability development that is focuses on how survival of urban people. Most of settlement in urban area occupied by urban people with location close to the river. River is a main living orientation of urban settlement for transportation, and daily needed. The riverside area is a first settlement of people before a city grow rapidly with million houses. It proved that urban settlement give many contribution in a city development. The objective of this research is to identify how urban people survival to contribute for city development. The location of research is old Kampung namely Kampung Pahandut closed to Kahayan riverside area, Palangkaraya City, Central Kalimantan Province, Indonesia. Research method used qualitative method based on three phase: preparation, field observation, post field observation. The output of research is a descriptive analysis by key person interview of urban people living in Kampung Pahandut. Three aspects have been analysed by physical, economic, and social aspects of urban people survival in Kampung Pahandut, Palangkaraya City. The research found that urban people can stable living in urban settlement of city center due to three aspects (physical, economic, and social aspects).
Deviant behaviour in the slum community of Palembang city
Authors: Sukmaniar  , Pitoyo A J , Kurniawan A 
Published: March 2021

Abstract
This research aims to describe the phenomenon of social deviation of slum dwellers in the city of Palembang. The research method is a qualitative phenomenological method for 64 informants living in slums and five key informants who came from the related field. The data analysis technique is done through three stages, namely data reduction, data display, and conclusion. The research results show the number of juvenile delinquency, including drugs, breathing hard glue and losing consciousness, getting drunk, fighting, and so on. Adults mostly do thuggery. Factors that trigger thuggery include difficulties in getting a job, low education, and poverty. Environmental events also occur in the slum community.
Potential development strategy of Gumeng tourism village, Jenawi District, Karanganyar Regency
Authors: Kuninggar M D , Muryani C , Yusup Y 
Published: March 2021

AbstractThis study aims to determine the development strategy of Gumeng Tourism Village, Jenawi District, Karanganyar Regency. Data collection was conducted through field observations, documentation, and interviews with stakeholders, and tourists in the Gumeng Tourism Village Area. Data analysis used qualitative descriptive analysis and SWOT accompanied by analysis of tourism development 6A attractions, activity, accessibility, amenities (basic facilities and infrastructure), ancillary services and available packages available tour packages as props) as supporting data. The result of this study indicates that the potential of tourism objects contains of 3 tourist objects including highly potential class, possibly potential class and less potential class. Based on the SWOT analysis, the strategy in managing Gumeng Tourism Village includes: 1) Creating Regional Regulations on Tourism Village Management by Regional Government. 2) Creating a grand design of tourism village development by the government. 3) Mapping of village potential and development of tourism villages based on the tourism cluster model and village potential base. 4) Increasing the use of information technology by utilizing social media for promotion. 5) Collaborating between Tourism Awareness Group and the travel bureau owners. 6) Improving the quality of training and coaching with constant training for tourism agents in Gumeng Village.
Analysis of dissolved carbon sequestration potentials at several springs in karst landscape, wonogiri regency
Authors: Wijayanti P 
Published: March 2021

Abstract
This study aimed to analyze the potential of dissolved carbon sequestration in several springs distributed over the Wonogiri Karst area – a carbon sink. It employed a survey method and collected momentary data at eight sampled springs. The main parameters were calcium, alkalinity, and discharge. The springs varied in discharge, ranging from 1 L/s to 140 L/s, and were found into two classes, namely class 3 and class 5. These springs showed the characteristics of perennial flows. The alkalinity and calcium content was distributed almost uniformly, except for Nampu Spring that had small levels in both parameters. The potentials of dissolved carbon sequestration in the eight springs varied between 4.3 x 108 and 9.3 x 109 mg/year, with the smallest level found in Nampu Spring and the largest one in Kakap Spring.
Water conservation based on local wisdom in Cikondang traditional village community
Authors: Hasanah S , Yani A , Setiawan I 
Published: March 2021

Abstract
The purpose of this study was to analyze the role of local wisdom on water conservation in Cikondang traditional village community. This study use qualitative-descriptive analytical methods, data collection using observation, interview, and documentation techniques. Primary data is obtained from the results of in-depth interviews with informants selected purposively, while secondary data is obtained from local government documents and related institutions, as well as from articles that are in accordance with this study. The data is then analyzed through the stages of data reduction, data presentation, and drawing conclusions. The results of this study indicate that with the ritual of water that routinely carried out every year and followed by the traditional village community of Cikondang can provide knowledge of the importance of preserving water sources, communities with high awareness participate in maintaining the water source area . There is also the concept of prohibited forest, where with certain rules the community cannot freely enter the forest, this is one of the local wisdom that can protect the environment, especially the availability of water. The implication of this research is local wisdom needs to be conveyed to future generations because it is quite effective in water conservation efforts.
Energy Efficiency Analysis in a Textile Company Using DMAIC Approach
Authors: Sakti S , Sopha B M , Saputra E S T 
Published: March 2021

Abstract
Textile industries generally consume a significant amount of electricity in their business operations, hence, efforts to reduce their consumption is necessary. This study assesses the energy consumption and energy saving opportunities in a textile company in Indonesia. A structured energy audit using Define-Measure-Analyze-Improve-Control (DMAIC) was implemented in the Spinning department. The evaluation indicates that 80% of the Specific Energy Consumption (SEC) are dominated by the factory air conditioner and chiller which is corresponding to 515 kWh/kg and 219 kWh/kg respectively. The Coefficient of Performance (COP) of the plant cooling system is 7.41 which conforms to the COP national standard. Further energy-saving opportunities include closing the door and other gateways of the air, replacing the refrigerant material from Freon R-134 to Musicool Mc-134, and installing inverter on mist nozzle motor, evaporator pump, condenser pump, and cooling tower.
Development of an Electronic Reverse Logistics Network Model: A Literature Review
Authors: Sari D P , Masruroh N A , Aasih A M S 
Published: March 2021

Abstract
The rapid development of technology and economy makes consumption of electronic products increased, so the potential for electronic waste will also increase. However, the high potential of this flow has not been matched by good waste management, especially in developing countries. One concept that can be applied to manage end-of-use products is reverse logistics (RL). Still, the RL concept, especially for electronic waste has not been practiced optimally. Therefore, it is necessary to have an RL management network on electronic waste to reduce the environmental impact and increase the economic value of waste. This study aims to explore the research progress of RL networks and recommended opportunity areas for further research using bibliometric analysis and systematic literature review (SLR). The output of bibliometric analysis is research trends on the topic of reverse logistics. The search process of bibliometric analysis is still limited to the keywords has not been done in-depth study of the contents of each article, so it needs to be continued with SLR. Articles obtained from bibliometric analysis are reviewed and analyzed using SLR so that the articles will be filtered and the numbers become smaller, so research opportunities in RL for electronics product can be identified.
A Cut-Off Grade Optimization Model in Open Pit Mining Considering Reclamation Cost and Revenue
Authors: Baidowi N , Rosyidi C N , Aisyati A 
Published: March 2021

Abstract
In open pit mining industry, cut-off grade has an important roles in affecting the total profit that will be earned by the company. In this research, cut-off grade optimization model is developed for open pit mining industry to maximize the total profit. We consider the environmental aspect in this model which consists of reclamation cost and reclamation revenue. We also consider the revenue of sales and valuable wasted materials revenue, and also the cost of selling stage, processing cost, mining cost, waste removal/rehabilitation cost and fixed cost. The results show that the model is able to determine the optimal cut-off grade and total profit that will be earned by the company can be estimated. Besides that, we can also estimate the completion time of mining project and the value of Net Present Value (NPV) and Return on Investment (ROI). The application of the model can be illustrated using numerical example that given in this study.
A Truck Allocation Optimization Model in Open Pit Mining to Minimize Investment and Transportation Costs
Authors: Isnafitri M F , Rosyidi C N , Aisyati A 
Published: March 2021

Abstract
In this research we developed an optimization model to determine truck allocation in open pit mining. The objective function is to minimize a total cost consists of investment and transportation costs. Investment cost is the purchase price of truck in early mining project according to the number of truck needed in each route. The transportation cost consists of fix cost for operators’ wages and variable cost in the form of fuel cost of trucks and shovels. The selection of truck types with different specifications is an important factor in the continuity of materials transportation by considering the costs incurred The model is solved using Oracle Crystal Ball Software for 5000 iterations. The result of optimization shows that Truck 75570 is selected to transport for route 1 and Route 4, Truck 75174 is selected to transport for Route 2, Truck 772 is selected to transport for Route 3, Truck 777F is selected to transport for Route 5, and Truck 7547 is selected to transport for Route 6. The total cost resulted from the optimization is IDR 295,783,073,068.69.
Development Models of Personality, Social Cognitive, and Safety Culture to Work Accidents in the Chemical Company
Authors: Sari R N , Dewi D S 
Published: March 2021

Abstract
Mental errors caused by anxiety, attitude, fear, stress, personality, or emotional state can cause accidents. To prevent workplace accidents, understanding the workers’ personality that reflect the pattern of psychological characteristics, thought, emotion and behavior is important. Personality is a basic human characteristic that is influenced by the social and cultural environment called socio-cognitive. A safety culture approach to the reducing accidents emphasizes the role of social forces in organizations regarding safety. This study aims to determine the relationship of personality, social cognitive, and safety culture to workplace accidents in the chemical company. The data was collected by distributing questionnaires to 73 workers, including the production area and the field workers in a chemical factory. The data is statistically tested by using PLS-SEM. The PLS-SEM used to determine the relationship between personality traits and safety culture (H1), the relationship between social cognitive and safety culture (H2), and the relationship between social cognitive and personality traits (H3) in chemical company. The test results show that the three hypotheses were accepted. This lead to the conclusions that personality traits have a positive relation to the safety culture; social cognitive have a positive relation to safety culture; and social cognitive have a positive relation to personality traits. In conclusion, personality traits, social cognitive, and safety culture are interrelated.
Design a Mechatronic System (Robot) to Transfer Table Tennis Balls
Authors: Rahman Md M , Yahya W J , Mondal K 
Published: March 2021

Abstract
Advancement of technology and human needs has contributed to the convergence of multiple engineering disciplines. Mechatronics engineering is an applied discipline that focuses on the design and study of complete engineering systems including mechanical, electrical, electronic, and control systems. This paper is concentrated on design a mechatronic system (robot arms) to transfer Ping-Pong balls. The aim of this paper is to explain the design process of producing a robot that will compete in a competition. The robot will be operated either wired or wireless within its designated area in performing the ball collection during a two-round match. Duration of 10 minutes is going to be allocated for every round. Top two teams that collect most balls between the 2 rounds will proceed to subsequent round (if quite 4 teams are competing). The performance evaluations will be in terms of number of Ping-Pong balls successfully placed inside the collection buckets.
Simulation of Thermal Dispersion in Location of Development of Diesel Power Plant Using Computational Fluid Dynamics Methods
Authors: Suryo M.S.K.T. , Yohana E. , Restiana T. , Gunawan R. , Rozi K. 
Published: March 2021

Abstract
Electrical energy is one of the important energy needs in human life. To meet the electricity needs in the North Maluku area, it was planned to build a diesel power plant (PLTD) in the coastal area of Halmahera. In the activity of the power plant, it produces heat wastewater from the rest of the radiator cooling process. This study, conducted a numerical simulation to determine the thermal dispersion pattern of waste heat from PLTD cooling water in Halmahera waters. Modeling the dispersion of heat waste temperature of PLTD cooling water is carried out using the Ansys CFD (Computational Fluid Dynamics) method in 3D. The input data are in the form of heat water discharge of 4,000 tons/hour, with heat wastewater temperature 37.5 °C. Ambient seawater temperature is 30.5 °C and seawater density is 1022 kg/m3. Hydrodynamic modeling of oceanic currents is modeled with two variations, namely constant current of 0.4 m/s and UDF current. UDF currents have different current values for each depth with a current velocity of 0.005 m/s up to 0.4 m/s. The simulated results of a constant current show the spread of heat to the environment occurs as far as 210 m to the north of the discharge outlet. The highest temperature value is 37.14°C, the lowest is 30.8°C. For these UDF current models, the heat spread is 210 m to the north of the discharge outlet with the highest temperature value is 37.13°C the lowest is 30.61°C.
Utilization of Bamboo Fiber in the Development of Environmentally Friendly Composite – A Review
Authors: Pramudi G , Raharjo W W , Ariawan D , Ubaidillah  , Arifin Z 
Published: March 2021

AbstractThis paper will review the parameters that affect the tensile strength of the use of bamboo fibres in thermoplastic composites. Natural fibres considered to be more environmentally friendly and easily degraded than synthetic fibres. Bamboo has a tensile strength that is not inferior to synthetic fibres. The tensile strength of bamboo fibres influenced by the parameters from the original physical properties of bamboo. The parameters that influence are species, age, and bamboo parts. This difference generally caused by lignin content in bamboo fibres. Lignin content will reduce the tensile strength of fibres. Therefore, bamboo fibre treatment applied as an effort to reduce lignin levels. Various treatments with chemical solutions have bee proven to reduce lignin levels. The selection and proper treatment of bamboo fibres will increase the tensile strength of the fibre. There will also affect the bond between the fibre and the matrix. However, in general, the relationship between natural fibres and thermoplastic matrices is bad. There is because there is no match between natural fibres and thermoplastic matrices. So, the selection of a matrix that matches the characteristics of the fibre must be considered. Pure and recycled matrix have very different characteristics and tensile strengths. In this paper, We have reviewed various sources of bamboo fibres, mechanical properties, modification of bamboo fibres, and effects of treatment on bamboo fibres. The main applications of bamboo have bee summarized as well as effective use as reinforcement for composite polymers.
The Characteristics of LPG Detonation Wave Propagation Behind Porous Media Model
Authors: Sentanuhady J , Tuasikal J A , Prasidha W , Majid A I 
Published: March 2021

Abstract
LPG-air mixture enriched with oxygen is usually used for generating heat in industry sector. However, it is possible that LPG-oxygen will mix and react independently and the mixture could generate detonation wave. This condition could harm people, environment, and piping system, thus detonation quenching to guarantee safety becomes very important. The present study aims to investigate the characteristics of the detonation wave after propagating through the porous media model. The experiments used a detonation test tube with 50 mm of inner diameter and 6 m of total length. The test tube consists of two sections, 1 m long driver section and 5 m long driven section. The driver section and driven section are separated by Mylar film to prevent mixing between driver gas and driven gas, which consists of different gas mixture with different pressure. The driver section contained a stoichiometric H2-O2 mixture at constant initial pressure, which function as a direct initiator for detonation in the driven section. Besides, the driven section contained a stoichiometric mixture of LPG-oxygen and LPG-air at the initial pressure varied from 20 kPa to 100 kPa with an interval of 10 kPa. The stainless-steel porous media with masses of 15 g and 20 g were inserted in a cylindrical case which had been perforated with small holes on its cross-sectional surface to enable detonation wave to propagate through it. The observation of detonation wave propagation was conducted at upstream and downstream of the model. Two mechanisms of detonation wave propagation were observed in the downstream of the porous media model for combustion of the LPG-oxygen mixture; they are detonation re-initiation and detonation transmission. However, the LPG-air mixture could not generate a detonation wave. Additionally, the 5 g increments of the stainless-steel porous media mass only significantly increase the re-initiation distance of detonation (Dri) for mixture with low initial pressure, 20 kPa up to 50 kPa and did not significantly influence re-initiation distance of detonation for mixture with a high initial pressure of 60 kPa to 100 kPa.
The Effect of T6 Heat Treatment on 7075 Aluminum on its Hardness and Tensile Strength
Authors: Darsono F B , Koin S T 
Published: March 2021

Abstract
This study aimed to determine the effect of T6 heat treatment on 7075 aluminum on its hardness and tensile strength. The T6 heat treatment process was heating the test specimens in an oven at various temperatures of the solution heat treatment (SHT) of 350°C, 400°C, 450°C, and 500°C for 2 hours. This process was then followed by quenching for 45 minutes and an artificial aging process at temperature of 120°C for 48 hours. The tests carried out included: Vickers hardness test, tensile test using ASTM B557-84 standard, microstructure test, and XRD test. The test results showed that the hardness and tensile strength before T6 heat treatment were 59.1 VHN and 235.7 MPa, respectively. After the T6 heat treatment was carried out, the hardness results were 105.8, 87.3, 108.9, and 171 VHN and tensile strength of 318.3, 415, 571.7, and 618.3 MPa, respectively. These results indicated that highest hardness was found in the SHT temperature of 500°C, while the increase in tensile strength was found in the temperature of SHT 500°C. It can be obtained because the formation of precipitate after the artificial aging process was due the formation of Al2CuMg and MgZn2.
Determining Water Content of Non-Surfactant Emulsion Fuel Using Bomb-Calorimeter
Authors: Sugeng D A , Abrori M , Syafrinaldy A , Kadir H A , Saputro F R , Kusdi B H , Bahiudddin I , Yahya W J 
Published: March 2021

Abstract
Non-surfactant Water-in-Diesel emulsion fuel (NWD) has short stability period and tend to separate immediately into water and diesel. NWD needs to be supplied into the diesel engine or combustor as soon as it was formed. Since the combustion and emission performance are closely related to the water content of an emulsion fuel, the immediate water content of NWD needs to be more closely inspected. The ASTM D95 standard provides a method to determine the water content of an NWD, but this method takes a long time to perform (up to 2 hours) and arduous. This paper describes the estimation of water content in a non-surfactant emulsion fuel by bomb-calorimetry, which can deliver quicker results than ASTM distillation. Experiments were performed with samples of emulsion fuel using and void of surfactant. The samples were first homogenized using an ultrasonic bath before they were sent to a bomb-calorimeter. The higher heating value of the emulsion was estimated using the weighted average since the components were deemed to be non-reactive. The bomb-calorimetric results of the non-surfactant emulsion fuel showed a close proximation, while the emulsion fuel with surfactant delivered less conclusive results. It was concluded from this study that an estimation of water content in NWD could be performed using bomb-calorimetry eight times faster than using the ASTM D95 standard with a deviation of maximum 3%.