bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Development of Smart Irrigation System With IoT, Cloud, and Big Data
Authors: Badrun Burhanuddin , Manaf Murshal 
Published: October 2021

Abstract
Irrigation management in several developed countries now uses modern technology by utilizing the capacity of the Internet of Things and Big Data for leak detection, water measurement, planning, monitoring and distribution. The Internet of Things provides new solutions for the irrigation sector and helps improve irrigation management and reduce operational costs associated with maintaining infrastructure. One of the biggest problems facing smart irrigation systems in Indonesia is the inability of stakeholders to convert available data into in-depth and accurate information that can be used in decision making. The purpose of writing this article is to prepare the concept of building a smart irrigation system for the sustainable use of water for stakeholders. Analysis and approaches are carried out by reviewing the development of smart irrigation systems from the perspective of Industry 4.0 (big data and internet of things), identifying the use of IoT-based technology, innovation and data-science best practices that can transform organizations and institutions, irrigation users become more data-centered centric artificial intelligence. The results of this study propose innovative simple semantic solutions to help irrigation users or farmers to measure humidity, rainfall, wind speed, soil temperature and solar radiation in real-time through mobile application information to the water user community.
The Evaluation of The use of Palm Shell Ash Waste to Polymer Modified Asphalt Mixture
Authors: Bethary Rindu Twidi , Intari Dwi Esti , Fathonah Woelandari , Andika Solehan 
Published: October 2021

Abstract
The palm oil industry’s development has a strategic role in Indonesia’s economy because Indonesia is the largest country and the largest exporter of palm oil globally. On the other hand, a new problem arises from increasing palm oil ash waste. This has encouraged the use of palm oil ash as filler mix asphalt. In this study, an evaluation of the asphalt mixture’s performance on the surface layer (AC-WC) will be carried out by utilizing palm ash waste as a filler using Starbit E-55 polymer asphalt. Testing the asphalt mixture’s performance using the Marshall method with asphalt content of 6% ± 0.5 and variations in the percentage of palm ash filler used, namely 3, 4, 5, and 6%. Samples are prepared and tested to obtain the stability and volumetric values of the mixture. Based on the results, it was found that the addition of palm ash waste as a filler could increase the stability performance at 3% filler content but there was a decrease in the filler content of 4, 5, and 6% in the test object without the addition of palm ash filler, the highest stability was obtained, namely 2358, 4 kg while the test object with the addition of 3% palm ash filler has a stability of 2503.03 kg at each asphalt content of 6.5%. The flow parameter in the test object continues to decrease along with the increase in the addition of oil palm ash filler, this is in line with the increase in the Marshall Quotient parameter which causes the mixture to become stiffness, this indicates that the mixture can withstand deformation due to traffic loads and shows that this oil palm ash potentially suitable for use as a filler in asphalt mixtures.
Synthesis of Composite Membrane Based Biopolymer Chitosan With Silica From Rice Husk Ash For Direct Methanol Fuel Cell Application
Authors: Purwanto Mochammad , Widiastuti Nurul , Saga B. H. , Gusmawan Heldy 
Published: October 2021

Abstract
A membrane chitosan with silica from rice husk ash was fabricated as alternative membrane electrolyte for direct methanol fuel cell (DMFC) application. Chitosan is made from shrimp shell powder which is processed through deproteination, demineralization and deacetylation steps. Furthermore, the phase diversion technique was used to synthesis membranes by mixing chitosan and silica in acetic acid solution. The resultant membrane characterized with FTIR, water and methanol uptake, ion exchange capacity, and methanol permeability. FTIR analysis showed that chitosan and silica was successfully synthesized. Water uptake for the chitosan-silica membrane increased with increasing silica loading, but the methanol uptake value decreased. The chitosan-silica with 15 wt% silica loading exhibited the best ion exchange capacity and methanol permeability which were 1.290 meq/gram and 2.42 x 10−4 cm2/s, respectively. All the result obtained from this studi shown that chitosan-silica membrane is a promising electrolyte membrane for direct methanol fuel cell application.
Determination of Weathered Layer Thickness Around the Landslide Zone using the Seismic Refraction Method
Authors: Hadi Arif Ismul , Brotopuspito Kirbani S , Pramumijoyo Subagyo , Hardiyatmo Hary C 
Published: October 2021

Abstract
The thickness of the weathered layer in the landslide zone can be determined by the seismic refraction method. This study aims to determine the thickness of the weathered layer based on the primary wave velocity (P-wave or Vp
). Data acquisition is taken around the landslide zone, namely above the landslide, parallel to the landslide, and perpendicular to the landslide. The data were collected using a digital seismograph 16S24. Furthermore, the data obtained in the field is processed to obtain a 2-D model. The results showed that the thickness of the weathered layer above the landslide was 2.15 m - 4.59 m with a Vp
value equal to 185 m / s. For the thickness of the weathered layer parallel to landslides is 0.80 m - 4.11 m with a Vp
value equal to 300 m / s and the thickness of the weathered layer perpendicular to landslides is 0.01 m - 2.35 m with a Vp
value equal to 300 m / s. Meanwhile, the bedrock layer under the weathered layer has Vp
of between 517 m / s to 1065 m / s in the form of sub-consolidated clay to very dense clay lithology.
Vessel Classifying and Trajectory Based on Automatic Identification System Data
Authors: Damastuti Natalia , Aisjah Aulia Siti , Masroeri Agoes 
Published: October 2021

Abstract
Nowadays, the development of the of Automatic Identification System (AIS) device has continuously increased. It was initially used to send information on the whereabouts of ships to avoid collisions, but with stored data, it is used for monitoring waters. Therefore, this study was carried out using AIS data to classify ships in Indonesian waters. Based on features such as length, width, and weight, it classified them into 9 types of vessels. The data mining process was used to characterize each type with the ensemble method. Furthermore, data processing was carried out to determine the ship’s trajectory pattern. In this study, 80% of training data was used while the rest were testing data. The results showed that an accuracy value of 99.8% was obtained with a Root Mean Square Error (RMSE) value of 0.12.
Preliminary result of electrical resistivity and electromagnetic methods to determine the bedrock
Authors: Paembonan Andri Yadi , Febriansanu Dicko Rizky , Huseina Angga Ahya , Sigalingging Asido Saputra , Nathania Edlyn Yoadan , Andika Putu Pradnya 
Published: October 2021

Abstract
Infrastructure development such as buildings, especially in multi-story buildings, really requires strong foundation support. In the construction of a multi-story building, usually using a pile that is embedded into a zone that has a hard rock arrangement or bedrock to support the building above it. This is a challenge for multistory buildings in areas of volcanic deposits or pyroclastic deposits. The rock layer below the surface in this area is dominated by less dense rocks such as tuff. This rock layer has more challenging when using for building foundations because it tends to be permeable, so a special method is needed to obtain information on hard rock or bedrock for building foundation needs. In other hand, the presence of weak zones, below the surface can cause sudden land subsidence which of course will damage the buildings on it. This study aims to determine the depth of the bedrock zone, in the pyroclastic deposit area using the integration of geophysical methods, resistivity and electromagnetic (EM) method. The resistivity method is more sensitive for areas that have large types of resistance or areas that are resistive, such as rocks that have low porosity and permeability such as igneous rocks. Meanwhile, the EM method is more sensitive in layers that have high porosity and permeability values or in conductive areas such as sediment layers. Nevertheless, the conductor layer is also influenced by the mineral content in the rock, so a good understanding of geology is needed in matching the data and conditions in the field. This is expected to be a reference in designing building structures, especially in pyroclastic deposit.
An Experiment of Determining Buried Channel Using ERP and IP
Authors: Paembonan Andri Yadi , Fattah Erlangga Ibrahim 
Published: October 2021

Abstract
Geophysical methods became an important technique for engineer since several decades. They have been used to study the engineering problem which has to be solved urgently. Detecting underground water channels is one of the most important issues in prevention and mitigation of water surge hazards in underground engineering. In this research, we use electrical resistivity profiling (ERP) and induced potential (IP) as the guide is proposed. By applying different configurations and varied electrode spacing, the water channel can be analysed by its resistivity and chargeability variation. The ERP method is sensitive to resistive layers which indicates the empty channel while IP can detect the presence of water. This is seen from both synthetic and measured data, where the resistivity of 60 Ω.m approximately implies that the channel is not filled with water, while in the area with moderate chargeability, ranging from 15 to 25 ms, indicates that water exists shrouding the channel. By understanding the known underground channel well, we can expand the study for other engineering problems and as references to apply the method in similar cases, such as the underground cavity which can be very important for infrastructure.
Petrophysics Evaluation for Determining Porosity of Shale Reservoirs
Authors: Hutami Harnanti Yogaputri , Winardhi Sonny , Priniarti Tiara Larasati , Handoyo  , Andara Muchammad , Christian Yoopy 
Published: October 2021

Abstract
Indonesia is known for its large potential of shale resources, yet the character of their physical properties remains unclear. This study focuses on how to assess the petrophysical properties of shale using conventional wireline logs. Shale has been largely known as a host rock producing hydrocarbon in the conventional petroleum system due to the amount of kerogen trapped during the depositional process. The kerogen or continuously called Total Organic Carbon (TOC) behaves like a porosity to a density log and this will be misleading to the higher porosity than the actual shale rock. Prior investigation evaluates the physical properties in shale rock, including shale porosity, TOC, and matrix mineralogy, at a certain limited depth. A solid rock is presumed to consist of a shale matrix and TOC. Meanwhile, shale porosity is contained only in water. TOC responses to sonic wave, density, and porosity logs. We calculated the experimental data to estimate the volume of TOC at the limited depth to obtain the correlation of available logs. Shale porosity is then computed using a density log with the TOC-influence removed. The results show that the shale porosity is to be TOC-free with a value range of 3-14%.
Authentication of Six Indonesian Ground Roasted Specialty Coffees According to Variety and Geographical Origin using NIR Spectroscopy with Integrating Sphere
Authors: Suhandy D , Yulia M 
Published: October 2021

Abstract
Several factors such as type of bean (Arabica or Robusta), geographical origin (elevation, soil type, temperature, and solar radiation), and agronomic/postharvest practices (fertilization, bean processing, fermentation, and type of roasting) have a great influence on the quality of final taste of the coffee. In this research, an authentication of six Indonesian ground roasted specialty coffees according to different in variety and geographical origin using NIR spectroscopy with integrating sphere was evaluated. A total of 70 coffee samples of Arabica and Robusta coffee from different geographical origins were used as samples. NIR spectral data in the range of 1175.79 nm to 1651.222 nm were obtained using a portable NIR spectrometer equipped with an integrating sphere. The unsupervised classification was performed using PCA and supervised classification was conducted using the SIMCA method. The result of PCA shows that the samples were well clustered according to variety and geographical origin along the PC1 and PC2 axis both using original and preprocessed spectra. The SIMCA performed good results both for original and preprocessed spectral data, most of the testing sample set were properly classified to their corresponding classes.
Chemical Compounds and Antioxidant Potential in Hot Water Extract of Cultivated Agarwood (Aquilaria malaccensis) Lamk Leaves
Authors: Batubara R. , Wirjosentono B , Siregar A H , Harahap U , Tamrin  
Published: October 2021

Abstract
Agarwood (Aquilaria malaccensis Lamk) leaves has potential as a source of antioxidants because in the hot water extract contains secondary metabolite compounds. This research aims to observe the chemical compounds and antioxidant potential in hot water extract of cultivated agarwood leaves. Agarwood leaves are processed into simplicia, and extracted with hot water. Several tests conducted in this research, including phytochemical screening in order to observe the chemical compounds in hot water extract of agarwood leaves; GC-MS test to observe the chemical constituents, and DPPH method to observe the antioxidant activity. Agarwood leaves hot water extract positively contained of flavonoid, triterpenoid, tannin and glycoside compounds. The identification result of agarwood leaves hot water extract using GC-MS test showed 9 compounds, they are Undecane, Benzene 1.3-dichloro-2-methoxy-, 1.alpha.- (Angeloxy)-6.beta-(isobutyroxy)-9-oxo-10.alpha.Hfuranoeremophilane, Methyl (6-Methyl-3-pyridazinyl) Ketone, 1-Heptyl-1H-(1,2,3)-triazole-N-{[2′-(hydroxyethoxy)ethylamino] ethyl}-4-carboxamide, 1-Heptyl-1H-(1,2,3)-triazole-N-{[2′-(hydroxyethoxy)ethylamino]ethyl}-4-carboxamide, Borane. [2-(dimethylphenylsilyl)-1-, ethyl-1-propenyl]diethyl-, (E)-, Hexadecanoic acid, methyl ester, and 1-Phenyl-5,5-dimethyl-4,6-dioxa-5-sila-8-nitrooct-1-ene. The antioxidant activity of agarwood leaves hot water extract is categorized as the very strong antioxidant activity.
Pitch angle control of a wind turbine using fuzzy logic control
Authors: Santoso Dian Budhi , Pangestu Adam Bagus , Latifa Ulinuha , Fauzi Ahmad , Zahro Latifa 
Published: October 2021

Abstract
Electricity is one of the primary needs, so we can be sure that the need for electricity for the Indonesian people is very large. This causes the need for development in empowering new and renewable energy power plants, one of which is wind turbines. Currently, technological developments are increasingly advanced, by following existing technological developments, a wind turbine must have more modern controls to make it easier to control the electrical power output generated by wind turbines. In this research control wind turbine blades using pitch angle with fuzzy logic control method, where this control will focus on adjusting the wind turbine blades because the performance coefficient of the wind turbine is very dependent on the wind turbine pitch angle. The fuzzy control is set to be able to maintain the stability of the wind turbine power output at 20KW, it is evident from the simulation results obtained with an average difference of only 0.77%.
The Application of Tactical Urbanism in Public Space on COVID-19 Transmission Prevention
Authors: Pradifta Fachmy Sugih , Puspitasari Gina , Indratno Imam , Fadhilah Faisal 
Published: October 2021

Abstract
Tactical urbanism (TU) is frequently used as an interim or low-cost solution to tackle a design-related problem in public space. As the importance of good-designed public open space for mental health now realized significantly during the pandemic, the need for a tool to keep health protocol followed in public space is imperative. The modification of public spaces is applied in several cases to guide people’s behaviour and interaction within public space under health protocol submission. This paper tried to analyse the application of TU to combat COVID-19 transmission on public space by using case study and systematic literature review from applied cases worldwide. The cases are categorized based on the problem identification and interventions conducted on urban design elements. It is found that the application of TU can be assembled into health protocol requirements-driven and accommodation of COVID-19-related policies externalities. The outcome of this paper could be used as an issue-based urban design precedent on COVID-19-related tactical urbanism interventions.
Study of Cultural Landscape Character in Pekon Hujung, Lampung Barat
Authors: Pratiwi R A , Nabilah R , Wijayanti G M 
Published: October 2021

Abstract
Lampung is a province on Sumatra Island, which has a variety of traditional settlement characteristics. One of the traditional settlements in Lampung is Pekon Hujung or “Ujung village”, located in Belalau District, West Lampung Regency. The houses in Pekon Hujung are still built from local wood materials and are referred to as ‘lamban’. Urban development that occurs quickly can shift the cultural values that exist in traditional settlement and its environment. Development will inevitably have an impact on the environment, both having a positive impact and a negative impact. One of the possible negative impacts is the loss of values and cultural characteristics that are unique to a traditional settlement area. This research was directed to identify the landscape elements that formed the landscape character so ita can be used to determine the right conservation actions. This research was conducted using the Landscape Character Assessment (LCA) approach to identify and to describe the elements and unique characteristics that formed the landscape. LCA method also can be used to make a significant contribution to environmental protection and sustainable development. The result shows that Pekon Hujung cultural landscape, as a traditional settlement is formed and depended on its natural resources and environment. Pekon Hujung still maintains tradition and culture in the form of settlement and the people activities.
Antagonistic activity screening of Bacillus siamensisLDR against fungal associated with crop contamination
Authors: Pertiwi M , Santoso I , Fadhilah Q G 
Published: October 2021

Abstract

Bacillus spp. are potential biocontrol agent that commonly used to reduce contamination on crop caused by microorganism, especially fungi. The purpose of this research is to investigate the antagonistic activity of B. siamensis LDR towards fungal crop contaminant (Aspergillus flavus AHM, Aspergillus clavatus ABH, and Aspergillus tamarii KCP). Antagonist assay was conducted using the dual culture method, streak and pour plate technique. The streak technique showed B. siamensis LDR can inhibit the A. flavus AHM, A. clavatus ABH, and A. tamarii KCP with percent inhibition of 42.75 %, 58.89 %, and 28.46 %, respectively. Meanwhile, the pour plate technique represented higher percent inhibition of A. flavus AHM, A. clavatus ABH, and A. tamarii KCP, 89.28 %, 87.32 %, and 66.35 %, respectively.
Pore type-based carbonate reservoir characterization using rock physics modeling of “RF” field North Sumatera Basin
Authors: Harahap R F , Riyanto A , Haidar M W 
Published: October 2021

Abstract
Heterogeneity and Complexity are the main reasons why carbonate reservoirs offer a great challenge for its characterization compared to siliciclastic reservoirs. Carbonate reservoirs are known for its variable pore type and this variability can affect the Vp value up to 40 %. Pore type can vary depending on its depositional environment and diagenetic processes and these pore types are highly correlated with permeability. Differential Effective Medium is used to model the elastic modulus of effective medium that takes into account the effect of complexity of rock pore type. This complexity, in modeling, is divided into three geophysical pore types, which are stiff pore, interparticle pore, and microcrack. The resulting rock physics model is then used to calculate the value of Vs. Pore type inversion shows that the dominant pore types in this study area are interparticle and microcrack. The results of 1D modeling are then distributed to seismic volume to map the spatial distribution of pore type. Sensitivity analysis shows that acoustic impedance, shear impedance, and porosity have a good correlation with pore type. Therefore, Probabilistic Neural Network is used to distribute 1D pore type to seismic volume by using acoustic impedance, shear impedance, and porosity as a training data. The resulting volume is then used to interpret the zones with best permeability
Residential relocation for landslide prone residences in the upper Ciujung watershed
Authors: Arbenta R , Marko K 
Published: October 2021

Abstract
Lebak Regency, which is in Banten Province, is an area in Indonesia that has many years affected by the landslide disaster. Banten Province itself is a disaster-prone area. In Indonesia, Banten Province is a province with a fairly high hazard rating according to BNPB in the Indonesian Disaster-Prone Index book. Landslide disasters often occur in regions of Indonesia that have diverse topographies. Landslides can cause various kinds of losses like physically, socially, and economically. In early 2020, Lebak Regency experienced flash floods which leads to many residential areas especially areas on the upper ciujung watershed to be affected by landslide. From this disaster that happened on 1st January 2020 alone, 20 bridges were damaged in the 6 affected sub-districts. The analysis in this study used the Spatial Multi-Criteria Evaluation (SMCE) method and an overlay. This study aims to produce locations which have the potential to be relocation areas for landslide prone residences in the Upper Ciujung Watershed which includes 5 district, Cipanas District, Lebakgedong District, Sajira District, Muncang District, and Sobang District. From this research, it was found that areas that have the potential to be the location of residential relocation are only in 4 of the sub-districts within the research areas with a total area of 88.12 Ha which is in the eastern part of Cipanas District, southeast of Lebakgedong District, and also in the western part of Muncang District.