bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geothermal potential area analysis using Landsat 8 OLI/TIRS and digital elevation model images (case study: Lawu Mount, Central Java)
Authors: Utama P P , Yoni D R , Amalia D , Ulhaq I D , Arya M S F 
Published: May 2024

Abstract
Mount Lawu is one of the volcanoes in Central Java Province with hidden geothermal potential. This research aims to identify geothermal potential areas, especially hydrothermal alteration areas, using Landsat 8 imagery in Mount Lawu, Central Java. Hydrothermal alteration serves as a crucial indicator in the exploration of geothermal potential in an area. Multispectral image processing methods of Landsat 8 are employed to map the distribution patterns of hydrothermal alterations in the study area, together with the anomaly of temperature and heatflux in the surface. This approach involves principal component analysis and spectral alteration indications that combine information from various image channels. Lithology and lineament density analysis strengthen the delineation and analysis of the geothermal potential area. The western-northwestern part of Mount Lawu is the most potential region for geothermal resources based on the distribution of hydrothermal alteration areas and the high density of faulted regions, which are also supported by geothermal manifestations such as hotspring sites in the area.
Source rock characterization based on geochemical observations using Well BO-1, Central Sumatra Basin
Authors: Herlienda Elizabeth K.G. , Sutadiwiria Yarra , Setiaji Ronoatmojo Imam , Cahyaningratri P.R. , Ali Jambak Moehammad , Livsey Andy 
Published: May 2024

Abstract
The Central Sumatra Basin, characterized as a tertiary back-arc basin, stands as one of Indonesia’s foremost hydrocarbon-producing basins. Consequently, in the pursuit of hydrocarbon exploration endeavors, a comprehensive analysis of the potential source rocks within this region becomes imperative. The focal point of this study is the BO-1 well, situated within the Pematang Formation. Geochemical analysis methods, specifically leveraging Total Organic Carbon (TOC) and Rock-Eval Pyrolysis data, were employed to assess the quality, quantity, and maturity of the source rock. The research findings reveal a noteworthy organic material content at a fair-to-good level, registering an average TOC value of 0.69% and a Potential Yield of 1,994 mg/g, both falling within the fair-to-good classification. The Hydrogen Index value designates the source rock as type III kerogen, indicating a propensity for gaseous product generation. Maturity evaluation places the source rock within an immature to mature range, with a maximum temperature range of 383-452°C. In summary, the analysis discerns the source rock within the research area as an effective type, characterized by a substantial organic material abundance at a fair-to-good level and a mature maturity level. This conclusion is reinforced by the lithology of the research area, predominantly comprising mudstone, recognized for its richness in organic material.
Depositional system of Halang Formation from Ci Mande and Panaruban River outcrop: an interpretive based on lithofacies and trace fossil
Authors: Herdiansyah Firman , Helman Hamdani Ahmad , Muljana Budi , Burhannudinnur Muhammad , Jambak Ali , Syavitri Dewi , Deva Ananta Adistayana Putu 
Published: May 2024

Abstract
This paper focuses on confusing various theories of Middle to Late Miocene sedimentary rocks, especially the Halang Formation in the CiMande and Panaruban River Banyumas Central Java. Previous studies revealed miscellaneous conclusions regarding the depositional system of this formation. This research was conducted with field observations, consisting of 2 measured stratigraphy section. Lithofacies and trace fossils are identified by making detailed vertical records of outcrops. The lithofacies association are: B1 is Massive Sandstone, B2a is Parallel Laminated Sandstone, B2b is cross-laminated sandstone, C2 is interbedded sandstone and shale, D1 is Siltstone, E1 is Mudstone, and F2 is Coherent deposits. Four variations of trace fossils include Thallasinoides, Skolithos, Chondrites and Rhizocorallium. It is classified into Skolithos Ichnofacies and Cruziana Ichnofacies in the lower shoreface. Skolithos and Cruziana ichnofacies association in the submarine fan due to local sediments preserved trace fossils are not ultimately consolidating. Based on the facies association, it has characteristics resulting from the turbidite mechanism, which was deposited in the deep marine fan environment precisely in parts of suprafan lobes on midfan. Conversely, the presence and diversity of trace fossils indicate that these sediments were deposited in shallow marine. The conclusion is that the sediment in which the trace fossils are preserved has been partially lithified, and the deposition reworked by gravity in the suprafan lobes on the midfan.
Study on the Influence of Salinity, TDS, GWL and Land Use in the Coastal Region of Kebumen Regency with a Statistical Approach
Authors: Radityo D , Pratomo S U 
Published: May 2024

Abstract
This study investigates the impact of salinity levels, total dissolved solids (TDS), groundwater levels (GWL), and land use patterns in the coastal region of Kebumen Regency, employing a statistical approach. Coastal areas are often vulnerable to salinity variations, which can significantly affect the surrounding ecosystems and land utilization. The research aims to discern the correlation between TDS, salinity levels, GWL and land use practices in this specific region, employing statistical analysis as a means of quantifying and understanding these relationships. Total dissolved solids (TDS) represent the concentration of inorganic salts, minerals, and ions in water bodies and play a crucial role in the overall water quality of coastal areas. Salinity levels, on the other hand, directly affect TDS and are influenced by factors such as tidal patterns and freshwater input. Groundwater levels affect salinity and TDS. Land use practices, including agricultural, residential, and industrial activities, profoundly impact coastal ecosystems and are often influenced by salinity levels. This study utilizes statistical methods to analyze the complex interplay between TDS, salinity, GWL, and land use in the Kebumen Regency coastal region. By examining data related to TDS, salinity, GWL, and land utilization, this research seeks to contribute valuable insights into the sustainable management of coastal environments. The findings of this study are expected to inform decision-making processes for the benefit of local communities and ecosystems, guiding future policies and practices for the preservation and balanced development of coastal areas in Kebumen Regency
Formulating flood mitigation through public participation, remote sensing analysis, and flood genetic understanding: study case Samarinda City flood January 2020
Authors: Rachman M G , Kurniawan O , Nugraha A 
Published: May 2024

Abstract
Samarinda, a city characterized by its unique topography and proximity to major rivers, has been grappling with recurring and escalating flood events. The frequency and severity of these floods have been well-documented in numerous past academic studies, underscoring the pressing need for innovative flood mitigation strategies. In response to this challenge, this study employs a multi-faceted approach by incorporating public participation, remote sensing analysis, and flood genetic understanding. To facilitate a comprehensive flood mitigation strategy, we initiated the collection of real-time reports from the public during flood events. The participation of the local community in this data collection process has provided critical insights into the dynamics of flood occurrence and its impacts. The integration of crowdsourced data has been instrumental in augmenting our understanding of the local flood patterns. In parallel, we harnessed the capabilities of the Sentinel-1 satellite to conduct remote sensing analysis, enabling us to identify and map inundated areas during specific flood events. This approach, utilizing Sentinel-1, has been validated in prior flood studies. Our research further combines these datasets, merging live reports with remote sensing flood mapping to detect and assess affected areas. We introduce a novel categorization system based on flood genetics, dividing the floodprone region into three distinct zones according to hydrogeological condition of each water catchment area. We divided the area into three zones based on its genetic. This model guides us to the innovative approach enriching our flood mitigation strategy based on those valuable insights. The culmination of our study is the formulation of tailored mitigation plans for each of the three identified flood genetic zones. Incorporating public participation, remote sensing, and flood genetic understanding, our study provides a holistic framework for flood mitigation in the flood-prone city of Samarinda. By harnessing the collective intelligence of the community, leveraging cutting-edge technology, and integrating advanced scientific concepts, we present a comprehensive approach to address and mitigate the ongoing flood challenges in the region.
The Prospect of Typhoon Landfall Observation Utilizing L-band InSAR
Authors: Setiawan Naufal , Arief Syachrul , Furuya Masato , Heki Kosuke 
Published: May 2024

Abstract
The cyclonic phenomenon, particularly typhoons within the 100° E to 180° E longitude region, bring significant devastation through intense rainfall and strong winds, causing secondary effects like landslides and floods upon landfall. This results in infrastructural damage and loss of life, ranking storm-related disasters, including typhoons, second only to earthquakes in casualties, emphasizing the need for a robust observation system. While higher income countries benefit from established radar and meteorological stations for continuous monitoring, this study highlights the critical necessity for an additional monitoring system in lower income countries. We investigate the applicability of Interferometric Synthetic Aperture Radar (InSAR) during typhoon landfall, particularly in densely vegetated areas where longer wavelengths like L-band (for instance, the Advanced Land Observing Satellite (ALOS/PALSAR) and ALOS-2/PALSAR-2) are suitable. By analyzing typhoon occurrences and confirming landfall using weather radar from 2007 to 2011 (ALOS/PALSAR observation period) and 2014 to 2023 (ALOS-2/PALSAR-2 observation period), our study successfully identifies the landfall of the Jebi typhoon on September 4, 2018. InSAR processing reveals significant phase gradients linked to dense water vapor during landfall, corroborated by comparisons with sea-level Zenith Wet Delay (ZWD) from Global Navigation Satellite System (GNSS) data and hourly precipitation rates from the Automated Meteorological Data Acquisition System (AMeDAS). The concurrence of InSAR results with ZWD values and rainfall data from meteorological stations validates the potential of L-band InSAR in observing typhoon landfalls.
Analysis of scale problem using acidizing stimulation in field Z Kalrez Petroleum (Seram) LTD.
Authors: Subekti Henk , Idrus Sumina 
Published: May 2024

Abstract
The annual decrease in production at well Z occurs due to scale deposits that impede fluid flow. Scale is a production problem due to the mixing of two types of water with different properties so that the solubility limit of the compound in the formation water is exceeded. To overcome the scale, stimulation is carried out with an acidizing method using a type of acid (HCL 10%). Evaluation was conducted to determine the effect of acidizing stimulation on scale based on productivity index (PI), inflow performance relationship (IPR) curve and comparison of stimulation methods. Evaluation of test results after acidizing stimulation of well Z experienced an increase in production. Productivity Index increased from 4.748 bpd/psi to 9.036 bpd/psi. Based on the IPR curve before acidizing, the maximum flow rate (Q max) = 324.107 bpd, increased to Qmax = 769.021 bpd. Based on the Cost Benefit Analysis (CBA), the Acidizing Stimulation method (10% formic Acid) was chosen to overcome the scale problem because the B/C ratio >1 or 1.9 means that for every 1 US$ invested in the Acidizing Stimulation method (10% formic Acid), a savings ratio of 1.9 will be obtained. So it is very reasonable to decide that the Acidizing Stimulation method (10% formic Acid), is feasible and more useful and efficient.
Evaluation of the application of the Havlena-Odeh method for determining reservoir OOIP with dual pressure maintenance
Authors: Kumala Sari Alvita , Taufiq Fathaddin Muhammad , Prakoso Suryo 
Published: May 2024

Abstract
Reservoir “X” produced since 2009, it has a very high level of complexity that is not found in other reservoirs in Indonesia at this time. This level of complexity can be seen in the dynamics/behavior aspect of the reservoir and the integrated dual pressure maintenance system. The update of subsurface data completes the level of confidence in calculating the estimated reserves of the reservoir. Havlena-Odeh’s Classic Material Balance approach has not been able to accommodate the uncertain aquifer (We) behavior (changing with time, complex unsteady state). This study intends to evaluate the applicability of the Havlena-Odeh material balance model in predicting original oil in place (OOIP) of reservoir with dual pressure maintenance. Based on the calculation results, Havlena-Odeh method was modified for this reservoir types to determine OOIP. This modified We formula is successful to represent in place counting of Havlenah Odeh Rules. A convergent original oil in-place estimate of 1,299,002,483.24 barrels of Oil is obtained
Laboratory study on the performance of AOS surfactant in increasing oil recovery
Authors: Pauhesti P , Satiawati L , Yasmaniar G , Saputra A K , Kalasnikova A 
Published: May 2024

Abstract
The decline in oil recovery in the oil and gas field is a problem that must be faced along with increasing energy needs. Efforts are made to increase oil recovery reserves with advanced methods, namely Enhanced Oil Recovery. In this study, an AOS (alpha olefin sulfonate) surfactant solution was used. Tests were conducted with varying concentrations at a salinity of 7,000 ppm. Phase behavior tests were also conducted for 7 days at 80 °C. The oil recovery value of the surfactant solution was also investigated. The testing stages carried out were density, interfacial tension, and core flooding tests. After making the surfactant solution sample, a density test was conducted at 30 and 80 °C. Finally, the core flooding test. The IFT results of the surfactant solution reached the critical micelle concentration (CMC) point so that it could reduce the interfacial tension well between oil and formation water in the reservoir with an interfacial tension value of 0.8212087 dyne/cm. Core flooding results are based on surfactants that reach the CMC point. There is a surfactant with a concentration of 1% Salinity 7,000 ppm at the CMC point with a recovery factor of 7.2727%.
Study of CO Gas Dilution in Forcing Ventilation System at Ramp Down KKRB 4 Utama, Pongkor, West Java
Authors: Yulianti R , Hartami P N , Aryanto R , Herdyanti M K , Suliestyah  , Pattiruhu D L 
Published: May 2024

Abstract
CO is a hazardous gas formed from the reaction of explosives that lack oxygen balance. These explosives have the potential to generate toxic gases, including CO. It is crucial to minimize CO concentration at the work site by ensuring proper air circulation. This study aims to examine the impact of varying ducting distances on CO gas dilution, using the gas diffusion coefficient value as a basis. The research method employed is observational, involving the assessment of CO gas dilution in the tested tunnel at varying distances from the working front to the sensor. The research was conducted on the Ramp Down KKRB 4 Utama. Result of the research is the most ideal carbon monoxide reduction time at RD KKRB 4 Utama is shown at sensor placement distance 1 using the blow system, where A Sensor takes 2.21 hours and B Sensor takes 1.06 hours to reach a concentration level below the TLV (Threshold Limit Value) 50 ppm.
The advances in the recovery process for precious metals from nickel slag, a review
Authors: Fadliah  , Raya I , Taba P , Burhanuddinnur M , Gaffar M , Dahani W , Palit C , Putri T W , Nur A 
Published: May 2024

Abstract
The creation of nickel-smelting products including important metals like nickel, cobalt, and copper is a persistent issue in the nickel mining business. Another secondary source of precious metals is nickel slag. In addition, the massive amounts of nickel slag generated by the nickel smelter sector will pollute the environment, particularly the soil, since the smelting slag contains hazardous materials. This study examines techniques for recovering precious metals from nickel slag by reviewing publications from Springer Link, Google Scholar, MDPI, ScienceDirect, Membrane Journal, and other authors. The two types of metal recovery techniques from nickel slag that were examined were hydrometallurgical and pyrometallurgical techniques. This review article describes a pyrometallurgical method that involves roasting and selective reduction. In the meantime, the hydrometallurgical techniques were examined in the high-pressure oxidative acid leaching process, the atmospheric acid leaching method, and the bioleaching process. A roadmap for research designs that can be used to recover valuable metals from nickel slag sustainably has been created due to the completed literature evaluation.
Geotourism of Telomoyo Volcano complex: an in-depth analysis for future development
Authors: Yudiantoro D F , Afrilita  , Pambudi S , Subandrio A , Choiriyah S U , Aryanto N C D , Apriniyadi M , Al Farizzi M I , Lukita A D , Santosa W B , Riyadurrizqy M S 
Published: May 2024

Abstract
Indonesia is located between the three world tectonic plates, the Eurasian Plate, the Indo-Australian Plate and the Pacific Plate. The collision of these three plates creates a series of volcanoes and tectonics activity in various regions, especially the subduction of the Indo-Australian Plate in southern Java. This subduction forming a row of tertiary-aged volcanoes in the south of the island of Java and quaternary in the central part of the island of Java. One of the Quaternary Volcanoes on the island of Java that is extends in a northwest-southeast, the volcanoes are Ungaran - Telomoyo - Merbabu - Merapi. The use of the geotourism analysis method is used to develop the existing geotourism potential in the Telomoyo Volcano Complex by carrying out a geodiversity inventory carried out through field activities to collect geological component data in the research area. The data collected is minerals, rocks, geological and morphological structures or landscapes that include several stages of work include categorization, assessment, evaluation, clustering and determination of geodiversity. This work is accomplished by identifying geoheritage to increase geological diversity into geological heritage through the stages of determining geodiversity and then classified to determine the status, value, meaning and function of geoheritage. The score ranking carried out to determine the geoheritage ranking by comparing the geotourism of the research location with the geotourism of other locations. The Telomoyo Volcano Complex holds a variety of unique and interesting geological phenomena so it had a promising geological conservation-based tourism potential. However, the lack of public knowledge about the potential for geology-based tourism or geotourism has caused the development of this tourism potential to be less than optimal and less desirable. Education, development and good management of the tourism sector are needed so that the potential of geotourism can be recognized by the wider community and can have a good impact, especially for the surrounding community, especially in the economic field.
Biofabrication of 3D adipose tissue via assembly of composite stem cell spheroids containing adipo-inductive dual-signal delivery nanofibers
Authors: Lee Sangmin , Lee Jeongbok , Choi Soomi , Kim Eunhyung , Kwon Hyunseok , Lee Jinkyu , Kim Sung Min , Shin Heungsoo 
Published: May 2024

Abstract
Reconstruction of large 3D tissues based on assembly of micro-sized multi-cellular spheroids has gained attention in tissue engineering. However, formation of 3D adipose tissue from spheroids has been challenging due to the limited adhesion capability and restricted cell mobility of adipocytes in culture media. In this study, we addressed this problem by developing adipo-inductive nanofibers enabling dual delivery of indomethacin and insulin. These nanofibers were introduced into composite spheroids comprising human adipose-derived stem cells (hADSCs). This approach led to a significant enhancement in the formation of uniform lipid droplets, as evidenced by the significantly increased Oil red O-stained area in spheroids incorporating indomethacin and insulin dual delivery nanofibers (56.9 ± 4.6%) compared to the control (15.6 ± 3.5%) with significantly greater gene expression associated with adipogenesis (C/EBPA, PPARG, FABP4, and adiponectin) of hADSCs. Furthermore, we investigated the influence of culture media on the migration and merging of spheroids and observed significant decrease in migration and merging of spheroids in adipogenic differentiation media. Conversely, the presence of adipo-inductive nanofibers promoted spheroid fusion, allowing the formation of macroscopic 3D adipose tissue in the absence of adipogenic supplements while facilitating homogeneous adipogenesis of hADSCs. The approach described here holds promise for the generation of 3D adipose tissue constructs by scaffold-free assembly of stem cell spheroids with potential applications in clinical and organ models.
A comprehensive review of protein-centric predictors for biomolecular interactions: from proteins to nucleic acids and beyond
Authors: Jia Pengzhen , Zhang Fuhao , Wu Chaojin , Li Min 
Published: May 2024

AbstractProteins interact with diverse ligands to perform a large number of biological functions, such as gene expression and signal transduction. Accurate identification of these protein–ligand interactions is crucial to the understanding of molecular mechanisms and the development of new drugs. However, traditional biological experiments are time-consuming and expensive. With the development of high-throughput technologies, an increasing amount of protein data is available. In the past decades, many computational methods have been developed to predict protein–ligand interactions. Here, we review a comprehensive set of over 160 protein–ligand interaction predictors, which cover protein–protein, protein−nucleic acid, protein−peptide and protein−other ligands (nucleotide, heme, ion) interactions. We have carried out a comprehensive analysis of the above four types of predictors from several significant perspectives, including their inputs, feature profiles, models, availability, etc. The current methods primarily rely on protein sequences, especially utilizing evolutionary information. The significant improvement in predictions is attributed to deep learning methods. Additionally, sequence-based pretrained models and structure-based approaches are emerging as new trends.