bluuebunny/crossref_metadata_2025_split huggingface dataset:
Genetic Variation and Genetic Advance of Three Elite Cassava (Manihot Esculenta Crantz) Clones Under Wet Dry Climate of Lampung
Authors: Setiawan K , Paresta R , Hadi MS , Utomo SD , Karyanto A , Najib MF 
Published: April 2022

Abstract
Waxy cassava having high amylopectin content could contribute and increase genetic background. Unfortunately, the genetic parameter information of three elite cassava clones as Waxy, UJ-5, and BW-1 is still limited. Consequently, the objective of this study was to evaluate the genetic variation and genetic advance of three cassava clones. This study was conducted on the Integrated Field Lab of Lampung from December 2019 to October 2020. Treatment was arranged by a single factor in RCBD with two replications. There were three cassava genotype clones, as Waxy, UJ-5 (originally Kasetsart), and BW-1 (originally Huay Bong-60). Genetics parameters were analyzed by using Minitab programs (Version 17). Variables observed were plant height, leaf number, attached leaf number, internode number, root number, tuber number, tuber fresh weight, tuber dry weight, stem dry weight, attached leaf dry weight, petiole dry weight, starch content, starch weight, and harvest index. The results showed that most variables had high genetic variation and heritability value except for starch content. Starch content showed a medium heritability value as 50%. Moreover, the genetic advance of starch content and weight were 14 and 18%, respectively. It could be concluded that an environmental factor influenced starch content.
Feed Intake and Feed Conversion Ratio of Broiler Supplemented with Herb Extract
Authors: Irwani N , Zairiful  , Habsari I K 
Published: April 2022

Abstract
Traditional ingredients from herbal plants can be used as antioxidants because they contain curcumin compounds that can affect the metabolic processes of the livestock body. Herbal are obtained from several rhizomes such as turmeric, ginger, lemongrass, and Curcuma. This study investigated the effects of herbal ingredients added to drinking waters. The variables observed in this study were Feed Intake, increase in body weight, and Feed Conversion Ratio. One hundred DOC of two strains were randomly assigned to four treatment groups with five replicates of 10 birds each: control (0 addition of herb ingredients), Treatment 1 (100 mg/kg BW doses of addition), Treatment 2 (200 mg/kg BW doses of addition), and Treatment 3 (300 mg/kg BW doses of addition). The data obtained were analyzed using ANOVA and Duncan’s multiple distance test. The results showed that combining the three herbs applied in drinking water improved feed intake and feed conversion ratio in broiler strains CP 707 and MB 202. However, the 5% Duncan test did not find the best interaction. Based on the results, it can be concluded that the addition of herbal ingredients (turmeric, ginger, and temulawak) affects increasing broiler productivity in different strains, both in the value of feed intake, body weight gain, and feed conversion ratio. However, the best interaction between the two broiler strains has not been obtained.
Morphological Responses of Edamame Soybean and Sweet Corn Planted in Intercropping with Combinations of Plant Populations on Three Varieties of Sweet Corn
Authors: Saputra H , Mutaqin Z 
Published: April 2022

Abstract
The intercropping pattern is a plant cultivation system that is very suitable for increasing productivity on marginal dry land with relatively low fertility levels. The regulation of plant population density and the selection of appropriate varieties can minimize the negative influence of competition between sweet corn and edamame soybeans to optimize the growth of both plants. The purpose of this study was to (1) determine the best plant population density in the intercropping pattern of sweet corn and edamame soybean (2) determine the best varieties in the intercropping pattern of sweet corn and edamame soybean and (3) determine the combination of plant population density and the best crop varieties in the intercropping pattern. The treatments were arranged in a factorial consisting of 2 factors. The first factor was the population density of edamame soybeans which consisted of three levels: 1 row of edamame soybeans between rows of sweet corn (B1), 2 rows of edamame soybeans between rows of sweet corn (B2), and 3 rows of edamame soybeans between rows of sweet corn (B3). The second factor is three sweet corn varieties, namely the Secada variety (V1), the Exotic variety (V2), and the Golden Sweet variety so that there are nine treatment combinations. The results showed that (1) the plant population density model of 2 rows of edamame between rows of sweet corn and sweet corn varieties Secada can produce the best sweet corn growth by increasing the wet weight of sweet corn, (2) sweet corn varieties that have the most suitable for intercropping in this research model is the Secada variety, based on plant height, the number of leaves, stem diameter, and plant wet weight, (3) edamame soybean produces relatively the same morphological growth in all population density models and sweet corn varieties used.
Minapadi Media Design for Fish and Rice Cultivation Systems in Dry Land
Authors: Nursandi J , Verdian A H 
Published: April 2022

Abstract
The area of agricultural and fishery land will decrease in the future. One of the potential efforts to be developed in increasing the area of agricultural and fishery land is the conversion of dry land into rice fields which is also a medium for aquaculture (minapadi). This study aims to obtain an applicable Minapadi design applied in dry land so that it can increase land productivity, expand agricultural land and efforts to increase food in the form of plants and fish. The stages of the research carried out consist of: (a). designing and building the Minapadi system (b). Minapadi system performance test (c) fish and rice cultivation (d). Conclude and provide system recommendations for fish and rice cultivation. The minapadi system starts from designing the minapadi media for dry land made by scribbling the soil, covering the pond with plastic tarpaulin, inserting the rice planting media into the pond, and arranging the air space as a place for fish to live. The performance test of the Minapadi system on dry land that has been made shows good results, namely being able to change dry management into rice fields that work as a place to grow rice while raising fish. The rate of evaporation of air in this dry land mining system is 0 - 90 liters/day, the design of the system measuring 3 m x 3 m x 0.5 m can be used as a medium for cultivating catfish, tilapia and betta with densities of 55, 22 and 11 fish, respectively/m2. The growth of rice planted on the media is quite good with the advantage that the planting media can be moved to adjust the space for fish to move. The final recommendation given is that this system has the advantage of being able to become a medium for cultivating various types of fish and possibly for growing various plants, worthy of being the choice of an integrated system model to be applied to Indonesian society in the future.
Internet of Things (IoT) Device Management in Rural Areas to Support Precision Agriculture
Authors: Mulyana Agus , Wahjuni Sri , Djatna Taufik , Sukoco Heru , Rahmawan Hendra , Nidya Neyman Shelvie 
Published: April 2022

Abstract
Internet of Things (IoT) devices have an important role in supporting precision agriculture systems, namely acting as the first layer consisting of several nodes in a limited network group as a producer of land, environmental and plant parameter data that will be processed at the next level. This node is an embedded system consisting of sensors, microcontrollers, power supplies and wireless communication media. The challenge that arises is when the number of new nodes that will be connected to the concentrator in a limited network group is quite large and is still done manually by the user, so that it has the potential to cause complexity and errors in configuration. The purpose of this research is to design a self-registration scheme from each new node to the concentrator in a restricted network group automatically. The method used by new nodes for self-registration is to read the RSSI (Received Signal Strength Indicator) value from the concentrator, then exchange metadata according to the OCF (Open Connectivity Foundation) standard. The concentrator will refer to the maximum number of nodes allowed to join the group and check the metadata of the new node. If the registration process is successful, the new node will gain access rights to communicate with the concentrator and its closest neighbours in the network group. This mechanism will help farmers in rural areas to be able to configure Internet of Things (IoT) devices easily and provide benefits in supporting precision agriculture.
Staple Food Price Information System in Bandar Lampung City Using JSON (Javascript Object Notation)
Authors: Sahlinal D , Maulini R 
Published: April 2022

AbstractThe price information system for Staple Food Prices is very helpful to the public by providing information on raw food prices for the Bandar Lampung markets. This information system allows the public to determine the price of food raw materials according to grouping: by product, by market and prices at a specific time. Investigation of information systems using data matrices and objects as alternative databases using JSON (JavaScript Object Notation), one of which applies information technology in the use of information systems with matrices and objects as others alternative databases. The results obtained are the monitoring of prices for the basic needs of the population to support the information system on the prices of basic foods. In general terms, how to monitor the price of community staples in support of the basic food price information system to capture the prices of basic community needs in each market. It is possible to use a database system with JSON in addition to an existing database, for example a relational database.
An Application of Coast Effect Correction to Magnetotelluric Data from Jailolo Geothermal Prospect Area, on the Island of Halmahera
Authors: Fahmi Fikri , Daud Yunus , Aswo Nuqramadha Wambra 
Published: April 2022

Abstract
Several geothermal prospect areas are situated near coastal regions. One of them is Jailolo geothermal prospect area located on the island of Halmahera. Magnetotelluric (MT) data obtained in the vicinity of the coast may be suffered from coast effect. Boundaries between ocean and land may induce severe distortion of electrical fields due to its extremely high conductivity contrast. The effect mostly distorted MT data in low-frequency and may produce some artifacts in deep parts of resistivity inversion model. In order to get a reliable subsurface resistivity model in Jailolo, a 3-D inversion of acquired MT data was carried out by including an oceanic model, which was set as a prior model, to overcome coast effect distortion. Before that, to examine coast effect influence on acquired MT data, 3-D forward modeling of a simple synthetic model was performed using a similar 3-D inversion mesh grid. Conductive seawater around survey area was also built in the mesh grid and adjusted to bathymetry data. Furthermore, synthetic MT data were then inverted in two schemes with and without oceanic model. Based on inversion results, use of oceanic model can significantly improve inversion result and give a more comparable inversion model with a synthetic model. Meanwhile, 3-D inversion of real MT data, which was carried out with a similar approach, successfully produces a representative subsurface resistivity model to describe geothermal system in study area.
Surface Thermal Manifestation Mapping in Kamojang Geothermal Field, West Java, Indonesia
Authors: Yuda Kencana Aditya , Rina Herdianita Niniek 
Published: April 2022

Abstract
Kamojang Geothermal Field is located in Bandung, West Java, Indonesia. Since 1978, this field has been producing electricity with total capacity about 235 MWe. Surface thermal manifestation monitoring is a powerful tool to monitor changes of reservoir condition. The investigation aimed at mapping new thermal manifestations and ground temperatures in Kamojang crater. The method employed is field mapping using drones and tracking. Ground temperatures were acquired directly in the field by measuring at 20 cm depth. Geologically, Kamojang Crater area is dominated by volcanic rocks such as andesite lava, pyroclastic breccia, tuff, and lapilli. It has undergone moderate to very strong alteration into clay, silica, iron oxide, and anhydrite minerals. The main geological structures that play a role in Kamojang area are Kendang, Patengteung, and Citeupeus Fault systems. Surface manifestations discharged in Kamojang area consist of mud pools/vents, hot springs/pools, steaming ground, and steam vents that are controlled by Citeupeus and Pateungteung Faults with a NE-SW orientation. The area was later referred to as Kamojang Crater, which consists of Manuk, Berecek, Sakarat, Kamojang, Kereta Api, Cikahuripan, Hujan, Loutak, Baru, Saar, and Inactive Craters. Several new hot spots have not been mapped in detail by previous research, including Timur Crater, Mud Pool Complex, and Tengah Crater. Meanwhile, an Inactive Crater to the north of study area indicates activity shown by boiling and bubbling hot pool. The thermal manifestation has a high temperature of 50.4 to 94.7°C. Manifestations in the form of liquids (mud and water) have an acidic fluid, with a pH ranging between 1.30 and 5.50. Ground temperatures in Kamojang Crater area range from 17 to 95°C. High temperature areas of 80 - 95oC are associated to thermal manifestations.
Reservoir Dynamics Monitoring in A Liquid Dominated Geothermal Field Based on Surveillance Data and Tracer Flow Test
Authors: Arif Wijaya Basuki , Berian Pratama Heru , Ashat Ali , Sutopo  , Dawud Hidayaturrobi Abu 
Published: April 2022

Abstract
Two common characteristics changes in the liquid-dominated reservoir because of exploitation are a decrease in temperature in the liquid reservoir zone (due to injection breakthrough) and the development of a steam zone (because of lower liquid water level). Both phenomena are observed by using the tracer flow test (TFT) technique. The comprehensive analysis using enthalpy from TFT data, combined with the data of chloride in brine, NCG in steam, and subsurface temperature (from PT logging), can be used to identify the dynamics of the reservoir processes. The application of the comprehensive analysis is selected for this study by taking those various monitoring of surveillance programs from a liquid-dominated geothermal system. In the selected geothermal field, which the operation began in 1994, an injection breakthrough occurred in the western part of the field. On the other side, the development of a steam reservoir was observed in the eastern part of the field. TFT monitoring is carried out every three months in each active production well as stated in the surveillance program. Other chemical monitoring and (PT) log data are also carried out periodically. Two wells from the studied field are selected, in which one well experience with injection breakthrough and the other one is in steam cap development. Comprehensive analysis results from TFT data, geochemical monitoring data (NCG and Cl), and subsurface temperature are used to understand the dynamics in geothermal reservoirs. Injection breakthrough in production well is indicated by changes in chloride content, decrease in enthalpy and NCG in the steam. Whereas the formation of steam cap will be characterized by an increase in enthalpy and NCG. With a thorough understanding of the changing conditions in the reservoir, recommendations for appropriate surveillance strategies can be formulated to maintain an optimal and sustainable generation process.
A Comparative Study of Cooling Sources in Organic Rankine Cycle for Low-Temperature Geothermal Heat Sources
Authors: Daniarta Sindu , Kolasiński Piotr 
Published: April 2022

Abstract
Geothermal energy refers to ground heat sources exploited for many purposes (for example, generating electricity). A steam power plant, that uses water as a medium and operating on the Rankine cycle, is a prospective technology that can be used to generate electricity utilizing geothermal heat. However, due to the thermal properties of the applied working fluid, the steam power plant has the limitation that may not utilize cold source like liquefied dimethyl ether (DME) at the temperature of around -25 °C or the extreme one, like liquefied natural gas (LNG) at the temperature of around -160 °C. For this reason, it seems that RC using an organic working fluid (so-called ORC) is an appropriate technology to utilize heat sources of extremely low temperatures. Selected ORC working fluids are considered suitable to absorb the cold source. This paper reported the thermodynamic modelling analysis and a comparison of geothermal power systems exploiting air, water, LNG, and DME as the cooling medium of the ORC. The simple scheme of ORC is used for modelling, furthermore, the Trilateral Flash Cycle (TFC) is described as a comparative study. Thanks to the LNG technology, it is already mature enough, and the method of altering the phase into liquefied form is likely to store the energy (i.e., the power to liquid). In the liquefied form, natural gas can be easily distributed and transported at a certain distance. In this model system, the result shows that LNG and DME appear to be excellent options for increasing the operating range of ORC. The modelling result shows that combining propane (a working fluid inside the cycle) and LNG (a cooling source) has a wider operating range and is a good option to exploit low-temperature geothermal heat as a power generation system. Also, using DME for both cooling sources and the working fluid inside the geothermal power system employing ORC outperforms other ones. Taking advantage of using them as a cooling source is significantly boosting the potential deriving from low-temperature geothermal energy (i.e., below 90 °C) as promising sources in the future.
Geothermal Direct Use Alternatives in Mataloko to Increase Public Acceptance
Authors: Haykal Ahmad Azaria , Adityatama Daniel W. , Akram Rusdianto Muhammad , Mintorogo Pradana Gughy , Amanda Beryll Trisha , Vian Prasetyo Pradana , Rachmadani Annisa 
Published: April 2022

Abstract
The island of Flores has a lot of geothermal potentials, so it is often called the geothermal island. However, there have been many rejections on the island of Flores, one of which is in the Mataloko Geothermal Working Area (WKP). This can be problematic if future geothermal development is about to take place in Mataloko. One alternative that has been widely discussed to increase public acceptance is by developing a geothermal direct use facility that can give benefit to the local communities while at the same time give education regarding the geothermal resource and utilisation to them. The purpose of this study is to identify the potential geothermal direct use in Mataloko that can fulfil those objectives. The literature study was conducted, combined with the site visit to verify the desktop study result. Several alternatives for geothermal direct use in Mataloko have been identified based on the geothermal resource, availability of commodities, and the current condition of local communities and industries in the proximity of Mataloko Power Plant. This study is admittedly still in the preliminary stage and a more detailed feasibility study for each of the alternatives is required in the future.
Awi A-4 Comprehensive Well Evaluation for Successful Well Intervention Program
Authors: Dawud Hidayaturrobi Abu , Dwi Yudhistira Ardian , Prameswari Putri Risa , Taha Maulana Dimas , Miryani Saptadji Nenny , Ashat Ali 
Published: April 2022

Abstract
AWI A-4 well has the highest Non-Condensable Gas (NCG) content among other production wells in the Salak field with NCG content 10%-wt. NCG interference study indicated that AWI A-4 has the most substantial connection/interference to several surrounding high NCG wells. AWI A-4 encountered wellbore obstruction (scaling) in 2012, which increased the NCG content of surrounding wells and power plant Unit-4, causing generation loss. Another impact is steam supply reduction by 71.8 kg/s because of maintaining Unit-4 NCG content below its maximum Gas Removal System (GRS) capacity by 2%-wt. Wellbore scale clean out was conducted in 2015 but failed and even plugged the wellbore. A comprehensive evaluation of well AWI A-4 wellbore condition and well characterization was conducted involving a multidisciplinary team (Drilling, Reservoir, Production, Geochemistry) in order to obtain a better understanding of the main cause of well AWI A-4 wellbore plug then develop the proper method to clean the wellbore plug and improve wellbore accessibility. After evaluating well AWI A-4 wellbore condition comprehensively, a new scale clean out program was developed using rotojet Coiled Tubing Unit (CTU) in 2017 which was finally able to improve wellbore accessibility well AWI A-4 including NCG content reduction of surrounding high NCG wells and power plant Unit-4. This successful wellbore accessibility improvement has a positive impact on additional/incremental steam supply by 84.4 kg/s, including other steam supply projects delay and cancellation, so that reduce the company’s operational cost.
Social Impact Management of Land Clearing Process in Dieng 2 Sub-Project, PT Geo Dipa Energi (Persero)
Authors: Rivelino Duta Muhammad Reyno , Pratami Putri Yogandari Agdya , Aunurrofiq Muhammad , Riyan Suryansyah Ahmad , Hendri Hefi , Marza Supriadinata 
Published: April 2022

Abstract
PT Geo Dipa Energi (Persero) “GeoDipa” has planned to expand its electricity generation with additional 110 megawatts (MW), 55 MW at the existing Patuha geothermal plant in Ciwidey, Bandung Districts, West Java and 55 MW at the existing Dieng geothermal plant in Wonosobo and Banjarnegara Districts, Central Java. The Dieng 2 sub-project will construct a new power plant, sub-station, transmission lines and pipelines. The expansion of the existing Dieng geothermal plant will require land in total of 30.83 Ha. Of this, 30.53 Ha of land is already owned by GeoDipa while the remaining 3,010 m2 is privately owned land. This will be required for a 10 m wide and approximately 301 m long corridor to serve as the Right of Way (ROW) the construction of a new pipeline and access road from existing wellpad to the proposed site of the Dieng-2 power plant. This paper focuses on the social impact management of land clearing process, prepared for the proposed site of the Dieng-2 power plant. Approximately for 58,479 m2 area that used to be cultivated by 23 (twenty-three) farmers/croppers; located in Karangtengah Village, Batur Sub Districts, Banjarnegara Districts. Land Clearing means to overtake GeoDipa’s land and make use of it for the construction site of Dieng-2 power plant, and it has triggered involuntary resettlement. GeoDipa has avoided unanticipated involuntary resettlement potentially emerged during the process; and also reduced the social impact. The unanticipated involuntary resettlement was mitigated based on the Indonesia legal framework and lender’s policy.