bluuebunny/crossref_metadata_2025_split huggingface dataset:
Measure distance locating nearest public facilities using Haversine and Euclidean Methods
Authors: Maria E , Budiman E , Haviluddin  , Taruk M 
Published: March 2020

Abstract
The application of finding the nearest public facility using 2 methods to measure the distance between 2 points, i.e. the Euclidean Method and the Haversine Formula. Euclidean is a heuristic function obtained based on direct distance without obstacles such as to get the value of the length of a diagonal line on a triangle. Whereas Haversine is an equation that looks for the distance of an arc between two points on longitude and latitude. The results of the calculation of the average distance Euclidean deviations with an average value of data 2.539764, and Haversine 2.536912. This shows that the comparison of the measurements of the distance between Euclidean and Haversine has a difference of 0.002852 or the percentage of the distance between the two methods is 99.89 percent. Of the two methods, which yield values almost by measurements on Google maps is Haversine. For Euclidean, it is used to measure the distance between two points on a flat plane so that the results have differences when compared to the Haversine formula.
Applied optical flow algorithm (OFA) in automatic target tracker system to control weapon movements in the warship
Authors: Sidi P , Adhitya R Y , Khumaidi A , Syaiin M , Endrasmono J , Sutrisno I 
Published: March 2020

Abstract
This research has made a tracking system to track the target, the purpose of this prototype is being able to be applied in the warship cannon guns. The system principal is tracking the targets that have been chosen to be targeted by the operator. This device works with the camera as the main sensor, the camera works to provide visual data, the visual data as an object was selected and processed to be targeted. The visual data is processed using the Optical Flow Algorithm (OFA) method by calculating the brightness intensity of the reference. The next step is finding the centroid value as the centre point for distance measurement. These results were converted into a microcontroller program that will move the direction of the tracker to follow the target which captured by the camera. The results of the object tracking test on this tool from 10 attempts can detect objects with an average accuracy of 100 percent at a distance of 1 to 9 meters. For testing the target lock, this system can reach the set point value within 2 seconds with the steady state error of 0.625 percent and the selection of the best proportional constant of 0.2.
The effect of Theobroma Cacao peels extracts inhibitors on mild steel fatigue behaviour
Authors: Yetri Y , Rakiman  , Gunawarman  , Hanif  
Published: March 2020

AbstractThis research relates with polar extract ofTheobroma cacaopeels as an inhibitor for corrosion to improve the fatigue properties of steel. The polar extract of cacao added varies from 5 percent to 2.5 percent, with 1.5M HCl corrosive media, and 32 days immersion time. To see the effect of corrosion, the steel is immersed in solution of HCl which has been added corrosion inhibitors. The results obtained were characterized by AFM, SEM, Energy Dispersive X-Ray, and fatigue strength testing using the ASTM E4662002 procedure. The results of adsorption during immersion showed that inhibitors were able to reduce the corrosion rate and increase inhibitory efficiency, thereby increasing the fatigue properties of mild steel. Surface analysis shows that surface topography looks smoother, because of adsorption on the surface in the form of a film layer that can decrease the corrosion attack. This smooth surface seems effective to avoid initiation of cracks on the surface of steel. Immersion of steel for 32 days in solution HCl 1.5M with 2.5 percent addition of cacao peels polar extract of are very effective to minimize corrosion attacks on surface of steel, then is able to recovery the fatigue properties of mild steel.
The effect of changing superheat degrees on energy consumption in a split air conditioning
Authors: Ardita I N , Wirajati I G A B , Sudirman  
Published: March 2020

Abstract
Split air conditioning is the most widely used in the community for both commercial and domestic purpose. But it can cause inefficiency or waste of energy use by the system. For this reason, it is very important to keep the system working in optimum conditions to prevent wasteful use of energy by the air conditioning system. This research will re-investigate the effect of the superheat degree of refrigerant coming out of the evaporator on the system’s energy consumption. This research is conducted by analytical methods and experimental methods whose implementation includes; designing and manufacturing of experimental equipment, installation of measuring instruments experimental data retrieval, data processing and yield analysis. Data processing is done by using thermodynamic methods to get the desired quantities such as; compressor power consumption, refrigeration effects and coefficient of performance (COP). The results were carried out by quantitative descriptive method, namely by analysing changes in the superheat degree of compressor energy consumption. Based on the analysis results show that if degree of superheat is increased, compressor energy consumption increases for all refrigerants used. Whereas COP system decreases for R22 refrigerant, is relatively constant for R410a refrigerant and raises an increase for other refrigerants tested.
The effect of addition of carbon nanoparticles on gasoline to power and fuel consumption
Authors: Suarta I M , Rahtika I P G S , Sunu P W , Ngafwan  
Published: March 2020

AbstractThe concerns about the continuity of energy supply have sparked the idea of many people to find things that can be used to save fuel use. One of the popular ways developed at this time is the addition of carbon nanoparticles. Carbon nanoparticles are carbon particles with a range size of 1/1, 000, 000, 000 m. Rice hust nanoparticle carbon with chemical characteristics (magnesium, aluminium, silica, potassium) are non-ferrous metal elements. The addition of carbon nanoparticles in the fuel serves as a catalyst (conductor of heat) in the burning process of the fuel. The carbon chemical content will add carbon to the fuel. The mass of rice hust carbon nanoparticles is which dissolved in gasoline fuel, causing molecules in the fuel to increase mass concentration and make sorter distance between molecules. Carbon nano additives can create micro explosions in the combustion process. Micro explosions will increase the pressure produced in the combustion chamber, also the micro explosion will accelerate the combustion process. With increasing pressure and combustion speed will increase the power produced.
Experimental analysis of fluids discharge in cooling tower condenser distillation model
Authors: Adiaksa I M A , Wibolo A 
Published: March 2020

Abstract
The application of traditional cooling distillation devices is carried out naturally where hot steam is left in the condenser tube. The heat transfer occurs depends on outdoor temperatures (20-25 degree C). The heat transfer is also felt to be ineffective because the time needed is quite long (2-3 hours). Based on these problems, we design a heat exchanger by applying cooling tower model to distillation condenser. Tests are carried out by experimental methods on devices designed to obtain the required temperature data. It is expected to obtain an effective heat transfer rate in terms of the amount of cooling fluid flow. Good difference from average heat transfer rate of 153.276 W/m degree C at discharge 2 l/min to an average of 168.758 W/m degree C at discharge 4 l/min. Increased heat transfer rate is 10.1 percent when fluid discharge is added 2 l/min. The increase in heat transfer rate is 13.7 percent when the fluid discharge is added to 4 l/min from the initial discharge of 2 l/min. The test results show that cooling water fluid discharge influences the rate of heat transfer that occurs because the cooling fluid can be more in contact with cooling area.
Design and fabrication of a CNC router machine for wood engraving
Authors: Bangse K , Wibolo A , Wiryanta I K E H 
Published: March 2020

Abstract
The purpose of this research was to designing and fabrication a Computer Numerical Control (CNC) based router machine for wood engraving machine. The idea behind this research was to help the traditional woods craft men in Bali to make a craft more productive and more efficient. The router machine that is made is driven by the driver in the form of a stepper motor, with a 3 axis motion so that the results of wood engraving obtained are precision and homogeneous. G-code program used on CAM processing uses MACH 3 software. The workspace of the machine was 800 mm x 500 mm. The stepper motor driven with TB 6600 driver and combined with ball screw on linear bearing to make the motion more precisely. The test result showed that the machine accuracy is about 99.5 percent for X and Y axis and 96 percent for Z axis.
Balinese green building model emphasizing on criteria of energy efficiency and conservation
Authors: Santosa I D M C , Arsana M E , Sukadana I B P , Sunu P W 
Published: March 2020

Abstract
As an international tourist destination, Bali becomes an island which has thousand tourist accommodation. Energy consumption for the accommodation getting increased year by year. This study was examined the energy efficiency and conservation for some commercial building and hotel in around Bali using green building standard approach. Firstly, auditing energy has been done and analysis to get energy consumption index comply with green building standard. Secondly, the energy efficiency model and conservation has been developed based on audit data, standard, references, and Balinese green philosophy “Tri Hita Karana (THK)”. As a result, obtained that Balinese green Building emphasizing on energy efficiency and conservation aspect have some criteria including, inhabitant’s behaviour, energy regulation, energy saving appliances/devices, building aesthetic and energy consideration, renewable energy, and VAC load control. This aspect was examined in this research. This aspect involved 13.59 percent weighting from overall assessment point which are including: energy conservation campaign, simple commissioning, MVAC control, lighting power density and control, energy monitoring and control, electrical equipment and appliances. These criteria have average similar weight point and integrated one and each other. The next goal for this model implemented is net zero energy building technology.
Drain water heat recovery horizontal for energy conservation and reduction of CO2 emissions
Authors: Sudirman  , Sudana I M , Ardita I N , Baliarta I N G 
Published: March 2020

Abstract
One of methods to reduce energy consumption for hot water heating is install of Drain Water Heat Recovery (DWHR) units. The purpose of using this device is to take the thermal energy of the warm drainage water and transfer it to incoming cold water. Many DWHR systems work optimally in a vertical position. Due to the waste water flow in drain pipes. But these requirements are prohibitive to be applied on a large scale of this technology, as many buildings do not have enough space to accommodate the vertical DWHR in their sewage drainage system. This paper presents testing and analysis of the horizontal DWHR system. The result of the test showed the level of effectiveness of the horizontal DWHR unit created by 25.54 percent. Implementation of this technology in regional area, is one of the potential opportunities for energy saving, and reduce CO2 gas emissions.
Thermogravimetric investigation of Reutealis Trisperma (Blanco) airy shaw and iron sand as bed material at different heating rates pyrolysis
Authors: Rajendra I M , Winaya I N S , Ghurri A , Wirawan I K G 
Published: March 2020

Abstract
This study observed the effect of bed material in the pyrolysis process. Also, other parameter such as the heating rate have been observed. The biomass studied is Sunan Candlenut cake. This biomass is a potential commodity as a producer of biodiesel. Through the method of mechanical press and esterification, it will leave waste in the form of a cake that still contains crude oil. Trapped oil can be converted into bio-oil through the pyrolysis technique. Parameters that affect the pyrolysis process include the addition of bed material and heating rate. Pyrolysis of this candlenut cake has been tested to determine the amount of activation energy. Heating rates are varied to 5, 10 and 20 K per minute and bed material used is iron sand. The testing instruments uses Thermogravimetric Analysis (TGA). The results show that the lowest activation energy of 15.497 [KJ/mol] is achieved when added iron sand at the heating rate of 10 K per minute.
On-site study the influences of load factor on power consumption and performance of air conditioning system for a commercial building
Authors: Suamir I N , Arsana M E , Sudirman  , Temaja I W , Wibolo A 
Published: March 2020

Abstract
On-site study was held to investigate the influences of load factor on power consumption and energy performance of water-cooled air conditioning (WCAC) system. A comprehensive measurement has been conducted to a WCAC plant of a supermall building located in West Java, Indonesia. Hourly and daily power consumption and performance characteristics of the WCAC system at varied load factors for a period of one year were evaluated. Regression analyses were developed to evaluate the influences of load factor on the WCAC power consumption and performance. The WCAC system was found to operate with varied load factor ranging from 70 percent to 100 percent. Power consumption of the system was strongly influenced by the load factor. Power consumption boosted when the power factor increased. The increase of load factor was also found to significantly improve the cooling capacity but reduce the coefficient of performance (COP). The best potential performance of the investigated WCAC system could be obtained at load factor between 70 percent and 85 percent.
The influence of coconut sap heating temperature on the content of alcohol elements in arak distillation process
Authors: Sudana I M , Waisnawa I G N S 
Published: March 2020

Abstract
The process of making wine by distilling coconut sap through the process of condensation of steam that is heated so that it becomes alcoholic wine. Prototype distillation of coconut juice by heating using a gas stove. The results of the study showed that there was an effect of heating duration on alcohol content in coconut juice, at 85 Degree Celsius, 90 Degree Celsius and 95 Degree Celsius, the time taken was 0 minutes, 10 minutes, 20 minutes and 30 minutes. The average alcohol content at 85 Degree Celsius, 0 minutes with 72 percent, 10 minutes with 69 percent, 20 minutes with 66 percent, and 30 minutes with 63 percent. For a temperature of 90 Degree Celsius, 0 minutes are 56 percent, 10 minutes are 54 percent, 20 minutes are 51 percent and 30 minutes are 49 percent. While the temperature of 95 Degree Celsius, 0 minutes by 34 percent, 10 minutes by 32 percent, 20 minutes by 29 percent and 30 minutes by 22 percent. Significance probability value is 0.00. Greater than 0.05 then the hypothesis is rejected, meaning there is a significant difference in the heating time to the alcohol content for 0 minutes to 30 minutes.
Solar photovoltaic system with self-consumption in villa
Authors: Sugiartha N , Sugina I M , Widiantara I B G , Tri Putra I D G A , Indra I B P 
Published: March 2020

Abstract
Grid-tied photovoltaic (PV) installations equipped with net metering devices become significant interests among villa owners in urban areas. Such devices can help to make sure of exporting excess power to the grid as well as to favor the self-consumption ratio. The self-consumption means that the owners directly utilize PV power production. This paper is aimed at simulating the energy and economic performances of a 3.24 kWp grid-tied PV system applied in the villa. The case study is a private villa located at Tibubeneng, Bali Province, Indonesia. The Sunny Design Web simulation tool is used for the PV system assessment. The simulation results reveal that the energy yield of the PV system is 4, 653 kWh/year, out of which 300 kWh/year is feeding to the grid. The self-consumption and self-sufficiency ratios are 93.5 percent and 35.6 percent, respectively. The PV system also delivers a performance ratio of 81.4 percent, the specific energy yield of 1, 436 kWh/kWp, and the payback period of 9.3 years.
Experimental and numerical optimization on chilled water configuration for improving temperature performance and economic viability of a centralized chiller plant
Authors: Suamir I N , Sudirman  , Ardita I N , Santanu G 
Published: March 2020

Abstract
This research aimed to simulate and optimize chilled water circuit system of a central air conditioning plant applied for a five-star hotel in Bali Island, Indonesia. This optimization was performed because temperature of chilled water distributed to the loading system could not satisfy room temperature requirement. Detailed measurements have been taken on the AC system included refrigeration system of the chillers, chilled water and cooling water distribution, cooling load, heat rejection and pumping systems. Thermodynamic analyses on the system energy performance were carried out. Numerical simulations were also established to evaluate chilled water flow rate in the primary and secondary circuits. The measurement and simulation results showed there was unbalanced chilled water flow rate between primary and secondary circuits and the chilled water flow rate did not comply with rule of flow ‘primary flow must always be equal to or greater than secondary flow’ resulted in the cooling load coils lost their cooling capability. Optimization on the chilled water flow rate between primary and secondary circuits by implementing variable speed pumping system incorporated balancing valve was estimated to be potentially improve temperature performance and economic viability of the chiller plant operation.
Optimization of electricity generation from marine sediment of Kendari Bay using stacked sediment microbial fuel cell
Authors: Sudarman R , Zaeni A , Usman I , Alwahab  , Hidayatulloh I 
Published: March 2020

Abstract
Marine sediments of Kendari Bay has the potential as an alternative source of electrical energy through sediment microbial fuel cell (SMFC) due to the high level of sedimentation. This study aims to optimize the amount of electrical voltage that can be generated through the SMFC system using stacked SMFC in the form of a series connection. The research methods include determining the sampling location, physical-chemical properties measurement of sediments, SMFC assembly (single and stacked SMFC), and electrical voltage measurement. Three station points representing the overall condition of Kendari Bay are determined as sampling locations. The result shows that there was a decrease in the organic matter content of the sediment substrate after the use of SMFC namely organic carbon from 2.78 percent to be 2.68 percent due to microbial activity in sediments. The single SMFC from station 2 (S2) can produce the maximum electrical voltage of 438 mV which then optimized using stacked SMFC in series connection. The maximum electrical voltage of 2.174V can be obtained using stacked SMFC. These results show that marine sediments of Kendari Bay is interesting as an alternative energy source through SMFC and stacked SMFC could optimize the amount of electrical voltage from single SMFC.
Design of assembly tools at woodworking and upholstery workstations with PUGH’s Method to improve productivity
Authors: Silaen D T H , Herdiman L , Susmartini S 
Published: March 2020

Abstract
This study is a research on manufacturing processes field, especially in the assembly process with a single workstation. This research was conducted on the implementation of manufacturing process of making lecture chairs at the Industrial Engineering Department at Sebelas Maret University. In this research, an assembly tool was designed to solve the problem of high time needed to complete the assembly process of the backrest and cushion seat components and work stations that are not ergonomic. The assembly tool design stages are based on a structured approach of Ulrich and Eppinger (2015) so that it’s good to develop new products and concept selection using the PUGH method to find out the concepts with the highest ranking and best fit the design criteria. This research involved 3 stakeholders, namely operator, lecturer, and assistant. The alternative concept chosen using components are pull-push toggle clamp, gas spring, M6 bolt, multiplex, cam buckle tie down, self-aligning ball bearings, aluminum extrusion 3030. Data on work productivity were tested with Paired T-Test at a significance level of 5 percent. The results showed that by using an ergonomic assembly tool design on woodworking and upholstery workstations, assembly cycle time increased significantly by 63.78 percent.
Work facilities design for people with paraparesis at hemming machine work station using TRIZ Method
Authors: Novianto M A , Herdiman L , Susmartini S 
Published: March 2020

Abstract
The number of disability employee in Indonesia increases every year due to traffic accidents, natural disasters, and diseases. It reached 16.81 percent of the total Indonesian workforce until 2017 [1]. According to the law which explains disability, each private company must employ disabled employee for at least 1 percent and state-owned companies must employ disabled employee for at least 2 percent from all employees. In fact, the regulation has not been implemented due to negative society views on disability. Therefore, it is necessary to empower paraparesis people to work independently so that negative views from the society can be eliminated. Empowerment of people with paraparesis at Balai Besar Rehabilitasi Sosial Penyandang Disabilitas Fisik (BBRSPDF) Prof. Dr. Soeharso Surakarta was conducted by training on the development of the hemming machine. Their legs are not able to use pedals, so they need work facilities to accommodate the design of work facilities based on participatory approach to determine user needs. Participatory approach was conducted with distributing questionnaires. Change of operation hemming machine which previously used feet changed using the elbows cause technical contradictions in design of work facilities. Technical contradiction problem can be solved using TRIZ method.
Design of pneumonia and pulmonary tuberculosis early detection system based on adaptive neuro fuzzy inference system
Authors: Santoso M Y , Disrinama A M , Amrullah H N 
Published: March 2020

AbstractThe results of Basic Health Research in 2018 showed the prevalence of pneumonia and pulmonary tuberculosis (TB) in Indonesia 4.0 percent and 0.4 percent, respectively. However, with a minimal number of lung specialists, the handling of lung disease will be too late. There are only 600-700 lung specialists in Indonesia. This amount is very less when compared with existing lung disease cases. The use of ANFIS for early detection of lung disease is growing. However, the system designed is still used for one type of disease. This research will design an expert system based on ANFIS to detect lung disease early, i.e. for pneumonia and pulmonary TB. Subtractive clustering is used for clustering process. The results of the training showed that both models were able to give better performance compared to the model built using conventional clustering methods. The test results show that both models have comparable performance compared to their counterpart.