bluuebunny/crossref_metadata_2025_split huggingface dataset:
Operator workload analysis on coconut tree climbing using portable coconut climbing equipment
Authors: Dhafir M , Idkham M , Safrizal  , Munawar A A , Azrial P 
Published: December 2021

Abstract
Recently, the work of climbing coconuts, especially in Aceh Province Indonesia still uses traditional methods, namely by climbing coconut trees directly. Traditional climbing is very high risk because it can fall which threatens the safety of life. Besides that, this job is also a heavy work category because it requires a lot of energy to do it. Therefore, the analysis of operator workload on climbing coconut trees using portable coconut climbing equipment is expected to be useful for developing tool designs and methods for climbing coconuts that are safer, more comfortable and more effective. The calculation of the operator’s workload is based on heart rate measurements, where three operators have their heart rate data taken during coconut tree climbing activities, either manually or using portable climbing tools. The workloads analyzed are qualitative and quantitative workloads. The results of the workload analysis indicate that climbing is traditionally classified as a “medium” job with an average IRHR value of 1.45, while using portable climbing equipment is classified as heavy work with an IRHR value of 1.54 The traditional climbing energy consumption rate is 3.29 kcal/hour.kg-ow (kilocalories per hour per operator’s weight), while using a portable climbing equipment is 3.82 kcal/hour.kg-ow. The high level of operator workload is largely determined by the operator’s habits in doing climbing as well as skills that must be trained in operating the tool. However, in terms of operator safety, the use of portable equipment has a higher level of security because there are footrests and handrails as well as seat belts.
Design of floating photovoltaic system for fish pond lighting
Authors: Arimufti G S H , Sunanda W , Gusa R F 
Published: December 2021

Abstract
The floating photovoltaic panel is increasingly being used. This is one of the ways to reduce temperature rise in photovoltaic panel. The floating photovoltaic panel is used for lighting at the fish pond. A unit of 8-watt lamp for lighting supplied by 1 unit of 50 Wp photovoltaic panel and 1 unit of 12 V/3.5 Ah battery. The heatsink attached to the bottom of the floating photovoltaic panel transfers heat from the panel to the fish pond water. Sensors are connected to Arduino to measure photovoltaic panel output voltage and current, solar irradiance, photovoltaic panel temperature and fish pond water temperature. From the measurement, the voltage generated from the floating photovoltaic panel is 12.71 – 14.71 V and the current is 0.15 - 1.17 A. While the solar irradiance value is 71 W/m2 to 396 W/m2, the surface temperature of photovoltaic panel is 26.9°C - 32.4°C and fish pond water temperature is 27.1°C - 30.2°C.
Quantifying the perceptions of the 2018 Palu earthquake survivors on the use of light bricks as a wall material of simple house
Authors: Tunas I G , Asrafil  , Parwati N M S 
Published: December 2021

Abstract
The construction of new housing for rehabilitation and reconstruction purposes must minimize the risks that may occur due to earthquakes, one of which is by using light materials (light bricks) as wall construction. However, the use of light bricks is often misunderstood by earthquake survivors because they are considered to have insufficient strength as a construction material. This paper intends to introduce light bricks to exposed communities and further quantify their perceptions of the application of this material to the rehabilitation and reconstruction of their buildings. The introduction of the material is done through socialization by displaying the results of laboratory tests of compressive strength and showing evidence of the application of this material in other places. The perceptions of the impacted community were analyzed from questionnaire results to 50 respondents with ten questions as the measurement reference. The results of the analysis show that almost all respondents show fairly good acceptance of light brick applications with a score of 3.70 of 5. Based on perception, the use of light bricks as a wall material has the opportunity to be applied for residential rehabilitation and reconstruction as a result of the 2018 Palu earthquake.
Analysis of linkage type sea wave power plant design through motion study and 3D printed modelling
Authors: Prayitnoadi R P , Wibowo B S , Pamungkas A , Islamiyah A , Lestari M , Putri R , Ridwan R F , Rosa F 
Published: December 2021

Abstract
Sustainable energy generation is becoming increasingly important because of the expected limitations in current energy resources and for reducing pollution. Wave energy generation has seen significant developments in recent years. This research has produced a linkage-type PLTGL design that utilizes ocean waves to raise and lower the float lever and move the linkage mechanism which then causes a back and forth movement of the rack gear which will rotate the pinion and cause the dynamo drive shaft to rotate. Using ocean wave data in the waters of Tanjung Berikat, Bangka Tengah, and with the help of the SolidWorks application, this design is then simulated to determine the resulting movement and rotation. The rotation generated through the simulation can reach 532 Rpm with the assumption that it does not involve friction forces and material loads that exist in the PLTGL design. This design was made in 3D using the CR-10 V3 type 3D printing machine which produced a model with a scale of 25% of the original design. The model is used as a discussion material for designers to improve the design.
The air quality index based on measurements of mobile air quality monitoring station at the waste-to-energy incineration plant PLTSa Bantargebang
Authors: Kristyawan I P A , Wiharja  , Shoiful A , Hendrayanto P A , Santoso A D , Suwedi N 
Published: December 2021

Abstract
Ambient air quality monitoring at waste-to-energy incineration pilot plant PLTSa Bantargebang is performed using a mobile monitoring station. The mobile monitoring station is equipped with meteorological and emission (CO, O3, NO2, PM10, PM2.5, and SO2) measurement. The monitoring was performed for 24 hour with 1 minute intervals. The emission measurement data was analyzed using Indonesian Air pollution standard index regulation (PermenLHK P.14/2020). The CO, O3, NO2, PM10, and SO2 index were in good category (1-50), while the PM2.5 index was classified as moderate (65.992). The results show that the air quality at PLTSa Bantargebang is still acceptable for human health.
Distillation-Adsorption of Bioethanol Using Natural Kaolin
Authors: Sari F I P , Wibowo B S , Irwanto R , Sarfita S 
Published: December 2021

Abstract
Bioethanol has been known as one of the alternative energy sources to replace petroleum. The use of bioethanol as a fuel has requirements that must meet fuel standards or refer to as Fuel Grade Ethanol (FGE). Further refining is required to achieve this qualification. The distillation method is the most commonly used method in bioethanol purification, but the results are less than optimal and sometimes the ethanol produced will be more volatile. Distillation-adsorption method using clay-based materials was developed to solve this problem. The purpose of this study is to purify bioethanol and determine the physical characteristics of the bioethanol produced and to assess the % purity of bioethanol from adsorption distillation. Characterization of activated natural kaolin as adsorbent, determination of the optimum contact time in the distillation-adsorption process, determination of the optimum mass of kaolin used and determination of the physical properties of bioethanol have been carried out. The results showed that 1 hour adsorption distillation could increase the ethanol content from 7.9% to 29.33%. In the study of the effect of the mass of kaolin, the optimum result was 25.25% ethanol using a mass of 5 grams. physical properties test of bioethanol obtained a density of 0.8211 gr/cm3 and a viscosity of 2.096 cps.
Advanced Yield Trial of F7 Upland Rice Lines with Lodging Resistance in Bangka Regency, Bangka Belitung Islands Province, Indonesia
Authors: Mustikarini E D , Prayoga G I , Santi R , Sari N P E 
Published: December 2021

Abstract
Upland rice with a high yield becomes a priority in rice breeding activities. High yield can be obtained if the rice plant has lodging resistance. This study aims to determine the yield and selection of F7 upland rice lines as the candidate for superior varieties with lodging resistance. The research was conducted in ultisol land, Bangka Regency, Bangka Belitung Islands Province. The study used the experiment method with randomized block design (RBD) with three replications. The treatment used F7 upland rice lines and 5 genotypes as check varieties. The five of F7 lines used were 19I-06-09-23-03, 21B-57-21-21-23, 23F-04-10-18-18, 23A-56-20-07-20 and 23A-56-22-20-05. The five check viarieties used were Danau Gaung, Inpago 8, Inpago 12, Rindang and Situ Patenggang. Data was analyzed using ANOVA and Least Significant Increase (LSI) test. The results showed that 2 lines had a higher yield than the comparison genotypes were 23A-56-22-20- 05 and 23F-04-10-18-18. Hence, the recommended lines as the candidates for superior varieties with lodging resistance are 23A-56-22-20-05 for red rice type and 23F-04-10-18-18 for white rice type.
Vocational high school as a part of Indonesian photovoltaics supply chain
Authors: Budiarto R , Effendy N , Aliyah F , Novitasari D , Mubarok I A , Arruzi R K , Fikriyadi Z A , Handayani T P , Adudu H H 
Published: December 2021

Abstract
As a part of its national policy, Indonesia significantly increases its photovoltaics (PV) role in its energy mix. As investment in PV grows significantly, there is also demand to increase benefits in new jobs creation. Meanwhile, the dependence on imported components and support for the operation and maintenance of the system is still a big challenge. There is a strong demand in increasing capacity of the national industry to provide support in various aspects. This capability in all parts of the Indonesian PV supply chain needs to be improved. This study explored the opportunity to more intensively integrate the vocational education system into the PV supply chain to answer the problem related to the PV application in Indonesia. The research was focused on the Vocational High School (VHS). The analysis is conducted on various data of the VHS: its number, its spatial distribution, and its program to develop the student’s expertise. The study shows that VHS has opportunities to play a significant role in developing the PV industry in Indonesia. It can be realized systemically not merely for skilled labor provision but also to increase the production capacity of various PV system components.
The effect of bioethanol mixture of raw coconut roomie (Cocos nucifera) with Pertamax (RON 92) and Pertalite (RON 90) fuels on the performance of a gasoline motor
Authors: Puspawan A , Supardi N I , Suandi A , Samosir H R , Indarto  
Published: December 2021

Abstract
Bioethanol is ethanol produced from glucose fermentation followed by the distillation process. The purpose of this study was to examine the performance of gasoline-fueled motors using bioethanol fuel mixed with pertamax (RON 90) and pertalite (RON92) fuels with a mixed percentage of B0%, B5%, B10%, B15%, and B20%. In this research, bioethanol is made from basic ingredients of coconut roomie (Cocos nucifera), which is fermented then continued with the distillation process to obtain bioethanol with a purity level of 80%. Bioetahnol is used as a fuel mixture using a gasoline fuel motor. The results of testing the mixture of bioethanol B20% and pertamax (RON 90) fuel with the highest torque is 11.94 Nm at rotation 2600 rpm. Bioethanol B20% and pertalite (RON 92) fuel with the highest torque is 11.79 Nm at rotation 2600 rpm. Bioethanol B20% and pertamax (RON 90) fuel the highest initial power is 4.58 hp at rotation 2900 rpm. Bioethanol B20% and pertalite (RON 92) fuel’s the highest power is 4.52 hp at rotation 2900 rpm. Bioethanol B20% and Pertamax (RON 90) fuel shows that the lowest specific fuel consumption is 0.28 kg/hp.h. Bioethanol B20% and pertalite (RON 92) fuel the lowest specific fuel consumption pertalite is 0.29 kg/hp.h. The greater the percentage of in pertamax (RON 90) fuel and pertalite (RON 92) fuel, the specific fuel consumption will be more efficient. In the mixture of pertamax (RON 90) fuel and bioethanol B20% is the largest value torque and power, but specific fuel consumption is the lowest.
Marine debris: Sources, characteristics, and environmental impact on Baturusa River, Bangka Belitung
Authors: Syari I A , Manik J D N , Akhrianti I , Pamungkas A 
Published: December 2021

Abstract
Seas are highly susceptible to pollution from marine debris. Baturusa River at the Bangka Belitung Islands province may be a major source of marine debris. Anthropogenic activities such as urban settlements, ports, and coastal tourism contribute to marine debris which threatens the environment. This study located at Koala and Pasir Padi Beach and the mangrove ecosystems surrounding the Baturusa estuary. The sampling and analyzing methods were based on NOAA and MoEF guidelines which categorize debris into macro-sized and meso-sized. In terms of weight, plastic dominated the macro and meso marine debris samples from Pasir Padi Beach with 60% and 100% respectively, and from Koala Beach with 30% and 56% respectively. The density of the debris samples mostly came from plastic with 3.4 pcs/m2 for macro, and cork with 0.76 pcs/m2 for meso. The source of the marine debris is assumed to be households and tourism, where waste is deposited in the river and is carried to the estuary where it threatens the mangrove ecosystems. The Mangrove Health Index of the Baturusa estuary is moderate, with 41.44% and 39.42% respectively. This study will be a fundamental data for formulating the most suitable regulation of waste management in Bangka Belitung.
The effectiveness of filtration and phytoremediation with combination of aquatic plants in wastewater treatment of Sasirangan industry
Authors: Ilmannafian A G , Kiptiah M , Darmawan M I 
Published: December 2021

Abstract
Most of Sasirangan fabric industry in South Kalimantan have not carried out an optimal wastewater treatment effort. In order to improve the quality of the waste, a combination of filtration and phytoremediation using the symbiosis of water hyacinth and Jeringau plants were applied. This study aimed to analyze the effectiveness of the filtration and phytoremediation processes using a combination of the two aquatic plants. The method used in this study was an experimental method with the treatment of a comparison of water hyacinth and Jeringau, namely 1: 3, 1: 1, and 3: 1 (w/w). The research stages are the acclimatization of the two aquatic plants for ten days, filtration with sand, gravel, and coconut fibers, and phytoremediation. The parameters tested in this study were BOD, COD, and TSS. The results showed that the combination of filtration and phytoremediation with the combination of the two water plants was able to improve the quality of sasirangan’s effluent. The best treatment for BOD and TSS was the combination of water hyacinth and Jeringau 1:1 (w/w) with the effectiveness obtained was 75.57% for BOD; and 63.93% for TSS, and the combination of water hyacinth and Jeringau at 3:1 (w/w) for COD with the effectiveness of 87.20% for COD.
The application of artificial neural network for quality prediction of industrial standard water
Authors: Muharni Y , Kulsum  , Denisa A , Hartono  
Published: December 2021

Abstract
Industrial Standard water is a source of water before being distributed in industry and household in a certain area. For the sake of health, quality water is a must to fulfill and control. Quality of water having several variables as indicators. One indicator, namely, Turbidity. It is defined as the level of cloudiness of water due to the presence of particles, mud or microorganisms. The highest of turbidity value meaning the index of water quality is low. In this study, we apply the Artificial neural network method for predicting the turbidity value. Three input variables are engaged, PH level, color spectrum, and electrical conductivity. As much of 827 data were collected during six months. Seventy percent are used for training and the rest thirty percent were used for testing. The ANN architecture consists of 3-6-1 configuration, 3 input variables, 6 hidden layers, and 1 output variable. The training was set into 1000 epoch and the MSE shows 0,0013, meaning that the ANN has the power of prediction. The prediction of turbidity level has a managerial implication as supporting information for purchasing decision of material in water processing
Solution combustion method to synthesize magnetic Fe3O4 as photocatalytic of Congo red dye and antibacterial activity
Authors: Salni  , Said M , Hariani P L , Apriani I 
Published: December 2021

Abstract
Fe3O4 has been synthesized using the combustion solution method using glycine as fuel. The Fe3O4 was used as a catalyst in the photocatalytic degradation of Congo red dye. The Fe3O4 were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS), UV-Vis spectroscopy, and vibrating sample magnetometry (VSM). The characterization showed that Fe3O4 has an inverse spinel structure with a crystalline size of 35.6 nm. Fe3O4 has an optical band gap of 2.16 eV, and a saturation magnetization of 83.76 emu/g. The study showed that the highest photocatalytic degradation was at 90 min of irradiation time using visible light irradiation, the concentration of Congo red dye of 10 mg/L, and pH solution of 5, with a photocatalytic degradation efficiency of 97.70%. The experiment indicated that the photocatalytic degradation of the Congo red dye by Fe3O4 followed a pseudo-first-order. Fe3O4 is effective as an antibacterial against gram-positive bacteria (Streptococcus aureus) and gram-negative bacteria (Escherichia coli).
Improved the quantity of DMM calibration services by speeding up the quality of the measurement method
Authors: Sardjono H , Wijonarko S , Wahono D R 
Published: December 2021

Abstract
The DMM standard is a digital multi-function standard measuring instrument used to determine the accuracy of the use of voltage and current values which are important parameters of electrical energy values. This measuring instrument is an intelligent measuring instrument because it is equipped with an intermediary facility to communicate with the control device. Regarding the application of the DMM standard in calibration services, the speed of service can only be carried out by the automatic DMM calibration system. Quality and continuity of calibration services can be obtained respectively by 350 % and 400 % after the establishment of the automatic DMM measurement system in SNSU - BSN.
Biosynthesis and characterization of zinc ferrite (ZnFe2O4) via Antidesma bunius L. fruit extract
Authors: Fabiani V A , Sari F I P , Nur’aini  , Putri S A 
Published: December 2021

Abstract
Biosynthesis of ZnFe2O4 via Antidesma bunius L fruit extract has been carried out. In this synthesis, Zn(NO3)2.6H2O and Fe(NO3)3.9H2O were used which act as precursors of Zn2+ and Fe3+ ions with a coefficient ratio of 1:2 using the coprecipitation method with variations in calcination temperatures of 500 °C, 600 °C and 700 °C. The precursor used is NaOH. XRD data showed that there are diffraction peaks of ZnFe2O4 in all samples but at a calcination temperature of 700,°C the diffraction peaks of ZnFe2O4 with high intensity are more visible at 2Θ = 31.78°, 34.42°, 35.2°, 36.22°, 56.61° this peak corresponds to the peak ZnFe2O4 diffraction (JCPDS 22-1012) in addition there is also a peak of ZnO at 2Θ = 31.7°, 34.4°, 36.2°, 47.5°, 62.8°, 66.5° and 69.2° (JCPDS 36-1451). FTIR analysis showed that the Zn-O stretching group was at wave numbers 837 cm-1, 870 cm-1, 1058 cm-1, 1065 cm-1, and 1350 cm-1. The Zn-O-Zn strain is found at wave numbers 1350 cm-1, 1633 cm-1, and 1634 cm-1, respectively. The appearance of these bonding groups proves that the synthesis of ZnFe2O4 has been formed.
Relationship of plant types to noise pollution absorption level to improve the quality of the road environment
Authors: Yofianti D , Usman K 
Published: December 2021

Abstract
The road conditions with high density and noise levels as well as the limited availability of plants along the road could lead to an increase in noise pollution. The quality of the road environment is influenced by the types of plants planted along the road. This study aims to determine the relationship between types of plants in absorbing noise pollution to improve the quality of the road environment. Data on plant type and noise levels on urban roads are obtain from previous research that has been conducted in several road segments in urban areas. The analysis will show the relationship between certain types of plants in reducing the level of noise pollution along urban roads. The reduced level of noise pollution due to absorption by certain types of plants can increase the comfort of road users in driving. In addition, improving the quality of the road environment can also support the implementation of the Green Infrastructure concept. Therefore, the quality of the road environment can be one of the considerations in planning urban roads.
Geopark Belitong : Environment Based Tourism Branding in Belitung Island
Authors: Zukhri N , Rosalina E , Christianingrum C 
Published: December 2021

Abstract
The Belitong Geopark is a new environmental-based tourism branding. It has been designated for 15 April 2021 in Paris. It has a meeting at UNESCO Global Geopark at the 211th session of the UNESCO Executive Council. This study aims to analyze how the perceptions of the community, tourists, and tourism actors on tourism in Belitung Island. It was establishing Belitung Island as a UNESCO Global Geopark. The study used in this paper is a quantitative study with surveys as the approach. Data collection technique by using questionnaires, interviews, observation, and documentation. The selection of the study was based on the consideration of being able to dig up more detailed information. So, an in-depth analysis could find the formulation. It is an effort to speed up the awakening of the eco-based tourism industry. It was on the island of Belitung. This study finds that the Belitong Geopark is new hope. The new hopes about the revival of Belitung Island’s eco-based tourism. Another finding from this study is that efforts are needed. The effort is to maintain the uniqueness of the Belitong Geopark. It was a combination of geological, biological, and cultural aspects. While still making it a habitat for the island’s flora and fauna in Belitung Island. The results of the study found hope from various parties. Expectations from the community, tourists, and tourism actors about tourist information. Information about landscapes, mystery rocks, minerals, geological processes Other information are tectonics and the process of earth’s evolution in Belitung. That’s all information as a tourist attraction.