bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effect of Soil Chemicals on Cocoa Productivity in West Sulawesi
Authors: Baja S , Harli  , Asrul L , Padjung R , Neswati R. 
Published: December 2021

Abstract
As Indonesia is one of the largest cocoa producing countries in the world, cocoa plays an important role in the Indonesian economy. However, cocoa bean production has continued to decline since 2012 in several cocoa producing regions in Indonesia, including West Sulawesi. The main problem for cocoa in Indonesia is the low productivity of the plants. The average productivity of cacao cocoa plants in West Sulawesi in 2019 was only 797 kg/ha/year. The productivity of the cocoa plants can reach 2,000-3,000 kg/ha/year. One of the causes of the low cocoa plant productivity of their cocoa plant is the mismatch between plant needs of and with soil chemical properties. This study uses quantitative methods with a deductive approach. Theis research took place in four districts in West Sulawesi, namely : Polewali Mandar, Majene, Mamasa and Mamuju Regencies. The determination of the 30 sampling point stations to provide representative profiles was based on cocoa productivity data. The results showed that there was a significant correlation between cation exchange capacity (CEC) and cocoa productivity. The amount abundance of exchangeable bases cations (Ca+, Ma+ and K+) hads a significant effect on cocoa plants in the high productivity category . There was a negative correlation between salinity for and cocoa plant productivity in the high (1500-2500 kg/ha/year) and low (<800kg/ha/year) productivity categories productivity category (1500-2500 kg / ha / year. Higher salinity causes lower productivity of cocoa plants. Likewise in the low productivity category (<800kg/ha/year). There was no correlation between pH H2OH2O pH with and cocoa productivity at all the representative profile points stations. There was a positive correlation between pH H2O pH and four other soil chemical characteristics, namely: C-Organic carbon, salinity, base saturation and the abundance of the number of exchangeable base cations can be exchanged.
A petrographic study of bauxite of Kenco area, Landak District, West Kalimantan Province
Authors: Nurhawaisyah S R , Jafar N , Bakri S , Artiningsih A , Widodo S 
Published: December 2021

Abstract
Lateritic bauxite are the products of intense weathering of rocks. It is largely controlled by bedrock type, time, climate (rainfall), and geomorphology. It is located in Kenco area, Landak district, West Kalimantan Province which the rest of the development of Cretaceous volcanism consisting of the island of Borneo Volcanic Formations Mensibau with unit members Granodiorite, quartz diorite and diorite, and the Formation of the Kingdom Volcanic Andesite-trachite units and Formations of alluvium and swamp sediment quarter. Bauxite deposits of Kenco area in Landak are investigated to determine the characteristics of rocks using petrographic analysis. Petrographic analysis aims to determine mineral content and type of source rock based on Travis classification (1955). The results of 15 thin sections showed that aluminum-bearing minerals consisted of orthoclase, plagioclase, and biotite which are the type of source rock are granodiorite, granodiorite porphyry, gabbro porphyry, and basalt porphyry based on Travis classification (1955).
Management Strategies to Protect Coastal Areas from Oil-Polluted Seawater (A Case Study of Coastal Areas in Bekasi Regency)
Authors: Agustine P , Parung H , Davey P , Frid C 
Published: December 2021

Abstract
Following an oil spill in the western Java Sea, in July 2019, the issue of oil pollution has received heightened interest. More and more people in Indonesia are increasingly aware that environmental damage will be a severe threat to the sustainability of ecosystems and environmental services. Given that oil pollution does endanger not only the aquatic ecosystem but also the surrounding terrestrial ecosystem, it is essential to encourage the involvement of stakeholders to contribute to efforts to prevent and minimize the impact of oil pollution in coastal areas that may arise in the future. Thus, since oil pollution is extremely harmful not only to aquatic ecosystems but also terrestrial ecosystems, coastal management strategies are urgently required to minimize the impact of oil pollution in the future. The overall aim of this research is to provide recommendations for policy formulations that may be adopted by the relevant local government to protect coastal areas from seawater contaminated with oil. This research uses both qualitative and quantitative approaches, including Statistical analysis, Strength-Weakness-Opportunity-Threat (SWOT) analysis and Analytical Hierarchy Process (AHP). The type of data collected will be primary data and secondary data which are sourced from experts and agencies engaged in the management of the coastal and marine environments.
Interactions of Growth Environmental and Application of GA3 Concentration On Shallot Productivity
Authors: Handayani A R , Syam’un E , Ulfa F 
Published: December 2021

Abstract
The purpose of this study was to evaluate the combination of technology using GA3 and agro-climate-based growing environment to increase shallot production in the lowlands. The study was designed with a nested factorial design, where the replicates were nested in an agro-climatic environment. The growing environment used consists of three conditions, namely open nature (e1), screen house (e2), UV plastic (e3). Meanwhile, the GA3 concentration (g) factor used consists of 4 levels, namely 0 ppm (g0), 100 ppm (g1), 200 ppm (g2) and 300 ppm (g3). This research design will be repeated 3 times for each treatment, so that the total experimental plot is 36 experimental units. The characters observed consisted of six characters, namely the number of leaves, absorption, reflection, tuber fresh weight, tuber diameter and tuber production. The results of this study indicate that GA3 treatment and UV application are very influential in increasing the productivity of shallots. The combination of 200 ppm GA3 concentration with the use of UV is the recommended technology in shallot cultivation. The fresh weight character of the tuber is a recommended secondary character in evaluating the potential of shallot cultivation technology. Hasanuddin University, Jl. Perintis Kemerdekaan No. KM.10, Tamalanrea Indah, Kec. Tamalanrea, Kota Makassar, Sulawesi Selatan 90245.
Analysis mixed characterization of Kalimantan coal and mangrove wood charcoal character as briquette raw material
Authors: Rahman R , Azikin B , Tahir D , Widodo S 
Published: December 2021

Abstract
This study using three types of coal from East Kalimantan and South Sulawesi Mangrove Wood Charcoal which consisted of various compositions. In sample analysis using analysis, namely: proximate, ultimate, and calorific value. Proximate analysis: ash content, volatile matter, moisture content, fixed carbon; ultimate analysis: carbon and sulfur content and the calorific value using the bomb calorimeter method. The results of the proximate analysis showed that the fixed carbon content was obtained in the mixture of MWC 75% + KJA 25% = 52.45%, while the lowest was obtained at IC 100% = 32.86%; The highest volatile matter was obtained at KJA 100% = 44.23%, the lowest was at MWC 75% + KJA 25% = 31.90%, the highest ash content was IC 100% = 9.14% the lowest was at MWC 75% + KJA 25% = 5.94% and the highest moisture content was seen at IC 100% = 15.17% but MWC 75% + IC 25% = 9.52%. The results of the ultimate analysis showed that the lowest sulfur content was in the mixed variation of MWC 75% + KJA 25% = 0.168%, while the highest sulfur content was obtained at IC 100% = 0.874%. However, it was still in the low sulfur category <1. The highest calorific value is obtained by varying the composition at MWC 75% + IC 25% = 5919 cal/gram, while the lowest was obtained at KJA 100% = 4913 cal/gram. So based on this research, the addition of mangrove charcoal is very good for increasing the calorific value.
Multi-Disaster Management Strategy in Indonesia
Authors: Maulana A 
Published: December 2021

Abstract
Managing natural disasters amid the Covid-19 pandemic needs a special strategic approach. Indonesia, as a natural disaster-prone country, is now facing a problem due to areas with high vulnerability and a lack of disaster literacy. A multi-disaster e.g., the occurrence of natural disasters in the middle of Covid-19) management strategy is badly needed to face up to this situation. This paper offers a multi-disaster management strategy based on empirical experience as a reference for stakeholders, especially government at all levels. Five strategies are offered to overcome the impacts of a multi-disaster event, especially in natural disaster-prone areas with high Covid-19 case rates. Strengthening government institutions is the first priority to be addressed as coordination among government at all levels (from central to regency and city governments) will minimize the casualties. Logistic and infrastructure arrangements should be well managed to avoid any panic and chaos during multi-disasters. Recruitment of volunteers could be very helpful during the emergency response stage. Provision of evacuation sites and temporary shelters that meet the Covid-19 requirements is a must to prevent virus spread during evacuation and emergency response stages. Last but not least, increasing individual disaster literacy should be considered an essential component of a multi-disaster management strategy. Finally, well-managed coordination between all stakeholders is paramount, especially in natural disaster-prone areas with a high level of Covid-19 spread.
Rainwater Harvesting to Increase Freshwater Carrying Capacity on Small Islands (A Case Study of Pramuka Island)
Authors: Girdayanto P , Davey P , Munir A 
Published: December 2021

Abstract
Pramuka Island is a small island that is covered with dense settlements, inhabited by 1,715 people, and experiencing rapid population growth with increasing visits by tourists every year ]. As a result, there is a high demand for freshwater, leading to a large-scale exploitation of groundwater on the island. Yet, a research conducted by [1] had indicated that groundwater on Pramuka Island is below the minimum standards for drinking water. This report discusses the effectivity of a rainwater harvesting system as a solution to the freshwater carrying capacity of Pramuka Island. The discussion involves analysis of freshwater carrying capacity based on water balance calculations between freshwater supply with rainwater harvesting and potential freshwater demands for domestic usage, tourism, and other activities. The results revealed that the scenario of the whole island as a rainwater catchment area is enough to supply local freshwater demand for approximately 27 years.
Evaluation of potential liquefaction based on Cone Penetration Test (CPT) data
Authors: Amaliah R , Harianto T , Muhiddin A B 
Published: December 2021

Abstract
An earthquake can inflict a liquefaction hazards which can damage buildings and infrastructure. Furthermore, earthquakes are difficult to predict when and where earthquakes will occur and happen suddenly without being preceded by signs. Therefore, we must do a geological investigation before building a construction to evaluate the potential liquefaction in that area. Evaluation of the potential liquefaction using Cone Penetration Test (CPT) is one method can be used because repeatable, provided a continuous profile, and economic. This method needs peak ground acceleration (amax) value at an interval of 0.1 g to 0.6 g and earthquake magnitude of 6.2 scale richter. Based on the results of the research was obtained in this research area, there were potential liquefactions when the peak ground acceleration (amax) value was above 0.3 g.
Permeability Measurement of Hot Mix Cold Laid Containing Asbuton as Porous Asphalt
Authors: Tumpu M , Gusty S , Tjaronge M W , Parung H 
Published: December 2021

Abstract
Porous asphalt is a pavement layer structure with aggregate gradations with a coarse fraction greater than 70-85% of the total weight of the mixture so that the resulting structure is more open and porous, which prevents water from stagnating on the road surface reduces water splash and makes the road less slippery. This study aims to analyze the permeability properties of a mixture of hot mix cold laid containing Asbuton in the form of porous asphalt. The research used was an experimental laboratory method. This study used Buton granular asphalt (Buton granular asphalt) with variations in BGA content of 4.5%, 5%, 5.5%, 6%, and 6.5%. The use of BGA is aimed at improving the performance of porous asphalt mixtures without using oiled asphalt. Manufacture of test objects through permeability tests. The results showed that the permeability value for the BGA content of 4.5% was 0.05 cm/s, the BGA content of 5% was 0.06 cm/s, the BGA content of 5.5% was 0.06 cm/s, the BGA content was 6%. is 0.03 cm/s and the BGA content of 6.5% is 0.02 cm/s.
Volumetric Characteristics of HRS-WC Mixed Using Petroleum Bitumen Grade 60/70 as Binder
Authors: Irianto  , Tumpu M , Parung H 
Published: December 2021

Abstract
This study aims to determine the volumetric values consisting of VIM, VMA and VFB on the binder layer mixture using HRS-WC gradation using petroleum bitumen as a binder. The method used in this research is experimental method in laboratory. In this study, variations of asphalt content used were 5.5%, 6.0%, 6.5%, 7.0% dan 7.5%. These variations were obtained from the calculation of effective asphalt level of 5.9%. The results show that the VIM values decreases along with the increase of bitumen content used. VIM values obtained were 6.69%, 5.82%, 5.18%, 4.42% and 3.34%, respectively. The VMA values obtained were 18.12%, 18.38%, 18.84%, 19.21% and 19.30% for each bitumen content. Besides that, the value of VFB is also taken into account and the values obtained for each quality of bitumen content are 63.10%, 68.41%, 72.57%, 76.99% and 82.71%.
The Effect of Loading Rate on Fracture Toughness of Concrete using Type I Fracture Toughness Test Flattened Brazilian Disc (FBD) Mode
Authors: Yaqin A , Djamaluddin  , Qaidahiyani N F 
Published: December 2021

Abstract
Mining activities in open pit and underground mines will always be associated with rock breaking or stripping activities (both mechanical and blasting), so that this can affect the structure and strength of rocks. The strength of the rock is strongly influenced by the presence of initial cracks (pre-existing cracks) and rock anisotropy conditions associated with discontinuous plane conditions. Fracture mechanics is a science that illustrates how a fracture can occur and propagate during applied stress on material. The main parameter in fracture mechanics is called fracture toughness which shows the resistance of the material to propagate the crack. There are several mode in determining type I fracture toughness, one of which is type I fracture toughness Flattened Brazilian Disc (FBD) mode. Type I fracture toughness test is carried out using a compression machine in a laboratory and is conducted on concrete samples consisting of 3 (three) various samples, with a ratio of cement and sand composition of 1:1, 1:2, and 2:1. This test also uses different loading rate values, namely 2.50 mm/min, 2.70 mm/min, and 2.83 mm/min. The results of the type I fracture toughness value from each loading rate will be compared to determine the effect of the loading rate on the value of type I fracture toughness. The obtained fracture toughness value is also related to the physical and mechanical properties of the samples. Based on the results of tests, it can be seen that the loading rate affects the value of fracture toughness, the increase in fracture toughness value is followed by the higher loading rate. In addition, it can be seen that the fracture toughness value is directly proportional to the uniaxial compressive strength value and the indirect tensile strength value. The average correlation value obtained is R2 = 0.9884 (indicating a strong relationship).
Spatial Mapping of Aedes Sp. Densities and Endemicity Level of Dengue in Three Villages in South Sulawesi, Indonesia
Authors: Ishak H , Mallongi A , Birawida A B , Syahribulan  
Published: December 2021

AbstractThe study aim to analyze the spatial map of the density ofAedessp., several measurement methods, and the relationship between environmental factors with mosquito density in Makassar City, Maros and Gowa Cities. The research method used an ecological study design. In this study, surveys of larvae, ovitrap and Lighttrap were be used to measure the density ofAedessp. Data processing using SPSS version 22 and Arview GIS 10.5. The results that spatial analysis showed a random pattern or spread of density of larvae, ovitrap and adult mosquitoes. the Larva and Ovitrap survey methods were specific measured the density of Dengue vectors (larvae, eggs and adult mosquitoesAedes aegypti) while the Light Trap method was not specific. There was a significant relationship between temperature, humidity and egg density andAedes aegyptimosquitoes in three DHF endemic sub-districts; except humidity and mosquito density was not significant in Bontoa Village of Maros Regency (p> 0.05). There was no significant relationship between the wire netted ventilation factor and the density ofAedes aegyptimosquitoes in the three DHF endemic sub-districts except for the mosquito density there was a significant relationship in Bontoa Village, Maros Regency.
Application of Bacillus subtilis on red onion (Allium ascalonicum)
Authors: Gau A D T , Syam’un E , Ulfa F 
Published: December 2021

Abstract
The increase of public consumption of red onion urge the increased production in order to meet consumer needs. To increase red onion production, it is necessary to formulate cheap and easy technology. This study aims to examine the effect of Bacillus subtilis on the growth and production of red onion (Allium ascalonicum). The research was conducted at the Laboratory of Plant Diseases, Department of Plant Pests and Diseases and Experimental Fam Land, Faculty of Agriculture, Hasanuddin University Makassar. The study was conducted from February to April 2020. 80-days old red onion were treated with Bacillus subtilis bacteria consisting of 4 levels, namely control (p0), 104 density (p1), 108 density (p2), and 1012 density (p3). The results showed that the application of Bacillus subtilis affected the number of leaves, number of stems (tillers), number of bulbs, bulbs diameter (mm), and bulbs wet weight per plant (grams) with the best treatment at a density of 108 (p2). The rate of sprouting was not affected by the application of Bacillus subtilis.
Marketing Efficiency In Rice Commodity Supply Chain Management In Kalukku District, West Sulawesi Province
Authors: Said S A , Darma R , Tenriawaru A N 
Published: December 2021

Abstract
The market performance measure that is often used is efficiency in marketing. Marketing efficiency can be improved by applying the concept of supply chain management in agriculture. This study aims to analyze the efficiency of marketing in rice supply chain management. The research was conducted in August 2018 in Kalukku District, Mamuju Regency. The sampling method was carried out by purposive sampling, obtained as many as 8 farmers with the criteria of owner or confinement farmers who have farming experience and several farmers who serve as heads and members of farmer groups, where information on farmers, it is known that the flow of products that involve other marketing agencies is also used. respondents in this study were determined by snowball sampling. Data analysis used is marketing efficiency analysis. The results showed that there were 3 rice marketing channels in Kalukku District, Mamuju Regency. The marketing channel has been efficient, where in supply chain channel 1 with an efficiency level of 12.9%, on marketing channel 2 with an efficiency level of 12.2%, and marketing channel 3 with an efficiency level of 13.2%.
The Potential of Hydro Renewable Energy Technology to Electricity Remote Villages in Papua and Maluku Islands, Indonesia
Authors: Sudibyo H , Pikra G , Fudholi A 
Published: December 2021

Abstract
The islands of Papua and Maluku are eastern Indonesia which consists of remote islands and villages. The Papua Islands consist of 3,749 islands divided into two provinces, namely Papua and West Papua, while the Maluku Islands are 1,735 islands into two provinces of Maluku and North Maluku, the number of inhabited islands in Papua and Maluku around 230 islands and around 100 newly electrified islands. The electrification ratio for Papua is 47.69%, West Papua is 89.94%, Maluku is 87.02% and North Maluku is 88.68%. The electrification ratio is still below the national average. Maluku Islands and Papua Indonesia has abundant renewable energy natural resources, namely hydro potential. The total hydro energy potential of Papua and Maluku is 808 MW. To overcome this shortage of electricity, it is necessary to develop a renewable energy generation system according to the potential of the area, namely hydro power. Energy generation technology that is environmentally friendly, efficient, effective, and reliable can be a solution for electrification in Papua and Maluku. Hydro power plants using vortex turbines, picohydro turbines and axial turbines for permanent magnet generators can be a solution to electrify areas or villages remote in Papua and Maluku.
Solar Tracker and Wind Guide Designs to Improve the Energy Conversion in a Hybrid Energy Harvester System
Authors: Ekawati Estiyanti , Gita Putra Gusnul Andria , Reza Muhammad Fahrur , Budi Eko Mursito 
Published: December 2021

Abstract
This study focused on improving the energy conversion of hybrid solar panels and a wind turbine system. The improvement was produced by enhancing the system with a solar tracker and a wind guide. A microcontroller operated the single-axis solar tracker based on a solar elevation database at -6.91N, 107.61E. The wind guide was an Omni Directional Guide Vane (ODGV), designed to support the drag-type Savonius turbine. The ODGV’s inside and outside diameters were 540 mm and 1000 mm, respectively. The wind guide had a 30° polar angle between fins and produced a torque of 0.128 Nm at a wind speed of 4 m/s. The solar tracker increased the system performance by 47% and the wind guide by 166%.
Modeling Radiation Exposure from Normal Release of 137Cs Radionuclide to Groundwater for Post-Closure Assessment of Serpong Near Surface Disposal Demo Facility
Authors: Anggraini Zeni , Rachmadetin Jaka , Shadrina Nazhira , Sucipta Sucipta , Sriwahyuni Heru 
Published: December 2021

Abstract
Near-surface disposal (NSD) has been applied in several countries to dispose of low-level radioactive waste. The demo plant of this disposal type is planned to be constructed in Serpong Nuclear Area, Banten. An assessment of radiation exposure is necessary to ensure the safety requirement of the facility in order to support this program. This study aims to estimate radionuclide migration from the proposed NSD demo facility to the environment and the corresponding total human dose using AMBER mathematical modeling. The representative radionuclide,137Cs, was selected because of its high mobility in the environment and the relatively long half-life in the low-level waste inventory. The scenario considered in the modeling was the normal release to the environment through groundwater. Parameters such as initial radionuclide concentration, soil physical parameters of the study site, and disposal design were entered into AMBER software to be calculated using mathematical formulas. The results show that the radionuclide concentration value in the environment is below the safe limit recommended by the Environmental Supervisory Agency. Likewise, the maximum dose received by the community around the facility is 7.40×10-11 mSv/y, 550 years after the post-closure of the facility, which is also below the regulatory limit of 1 mSv/y for the public.