bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimation of Rock Mechanical Parameters Using Well Log Data in the Well Poseidon 1, Lower Cretaceous, Browse Basin, Northwest Shelf, Australia
Authors: Peña Cerón K L , Surjono S S , Indrawan I G B 
Published: October 2023

Abstract
This work implements a well-logging approach to evaluate the rock Elastic Parameters, basic Rock Mechanics, and in-situ Stresses in an interval of the Well Poseidon 1 located in the offshore Browse Basin in the Timur Sea of Australia. For this aim, there were used several correlations for the Young’s Modulus, Uniaxial Compressive Strength; one formula for Poisson’s Ratio and one for Angle of Internal Friction, and the Poroelastic Model with tectonic strains for the horizontal stresses with calibrations from logs. All these estimations were compared to a homologous section with triaxial test laboratory data and with previous studies. The results reached indicates that the chosen correlations can replicate under the adequate considerations the values of the rock mechanics and they give also good estimations for in-situ stresses in the interval studied. Moreover, these can be used to model the Young’s Modulus, Uniaxial Compressive Strength, Internal Friction Angle with fair precision. This methodology can be used in order to create geomechanical models by estimating the basic parameters needed, these models can be applied to Improved Oil Recovery, Enhanced Oil Recovery, Carbon Capture and Storage, and Carbon Capture Utilization and Storage projects.
Study of The Impact of Convectively Coupled Equatorial Kelvin and Rossby Waves on Rainfall Extremes in Sulawesi, Indonesia
Authors: Zibrah Muhammad Subhan Al , Sagita Novvria 
Published: October 2023

Abstract
This study examined the impact of Equatorial Kelvin and Equatorial Rossby (ER) waves on rainfall extremes over Sulawesi Island, Indonesia. Impacts are assessed by changes in the probability of rainfall events that exceeded extreme value and changes in the fraction of wet days. Using Asian Precipitation – Highly Resolved Observational Data Integration Towards Evaluation (APHRODITE) rainfall data and Outgoing Longwave Radiation (OLR) from NOAA, impacts are quantified with the respect to wave’s local phase grouping. The local wave phase is based on the standardized OLR anomalies and their temporal tendency. Results showed that Kelvin and ER wave can modulate daily rainfall extremes over Sulawesi Island. Kelvin wave has the strongest impact with changes in the probability of extreme rainfall by up to +100% (-70%) in phases 5 and 6 (1 and 2) and increases the value of wet day fraction by up to > 0.04. Followed by the ER wave with changes in the probability of extreme rainfall by up to +50% (-50%) in phase 4 (1 and 2) and increases the value of the wet day fraction by up to 0.05. The superposition between ER and Kelvin wave occurrence increases the possibility of extreme rainfall occurrence by up to 100 % in almost every part of Sulawesi island in phases 4,5 and 6. The results suggest that Kelvin and ER waves can be another important source of predictability for extreme rainfall on Sulawesi Island.
Subsurface Structure Evaluation Beneath the Sileri Crater’s East Flank Using the Misfit Function Gradient of the Full Waveform Modeling
Authors: Ramadhan D P D , Paninggar P A , Darmawan H , Irnaka T M 
Published: October 2023

Abstract
Sileri crater is one of the prominent craters in Dieng Volcanic Complex. It is one of the craters in the area with the highest activity of phreatic eruption. This type of eruption is characterized by a minimal to no precursor beforehand, making mitigation more challenging. Previously, there is minimum number of research which tries to understand the subsurface properties of the crater. Therefore, in this research, we integrate two methodologies to understand Sileri crater’s characteristics better. An Unmanned Aerial Vehicle (UAV) survey was conducted in parallel with the surface seismic survey. The UAV data was then processed, yielding a Digital Elevation Model (DEM) and orthophoto for surface analysis. The ground seismic survey on the east flank of the crater was processed to obtain the gradient with respect to the misfit function. The obtained gradient information can be used to interpret the tendency of the subsurface velocity model. Through this process, a vertical shape positive gradient anomaly is detected at the crater’s northeast flank, which may correspond to the hot spring activity. The constant positive gradient anomaly layer throughout the model, which corresponds to the alteration zone, is also detected. Another 10 m depth positive anomaly is also found in the model’s southeast part, which corresponds with the new potential geothermal activity. The location of the anomalies in our investigation indicating a continuous tendency in the east which correspond to the possible eastward expansion of the crater. This finding is important to better monitor and mitigate the future activities and eruption of the Sileri crater.
Formal-Informal Employment and Poverty Dynamics: A Case Study of Mentawai Islands Regency, 2019-2021
Authors: Putri R F , Sarajwati M K A , Aini F A N , Setiacahyandari H K , Dairina I , Dewi A K 
Published: October 2023

AbstractMentawai Islands Regency is part of the frontier, remote, and underdeveloped regions in West Sumatera. Participation in the labor force is often considered a key to ensuring a good income and resources, which can help people escape or avoid poverty. The absorption of labor shown by the Labor Force Participation Rate (LFPR) in this regency shows the highest value within West Sumatera i.e 82,57% in 2021. However, its poverty rate was 14,84%, whereas West Sumatera’s rate was only 6,63%. This study aimed to analyze the dynamics of poverty and employment in Mentawai Islands Regency using secondary data from BPS Indonesia with descriptive and comparative approaches. The results show that 79,4% of the working population and 67.8% of the poor are involved in the informal sector. The high proportion of the poor workers in the informal sector can be influenced by numerous variables, including the lack of education. Even though the sector utilizes many workers, informal workers’ average monthly net income in Mentawai Islands Regency is among the lowest in West Sumatera. Therefore, despite the high number of LFPRs, not all forms of work are equally sufficient to avoid poverty, and employment does not guarantee a way out of poverty.
Study of Regional Economic Resources Potential at the Former Residency of Banyumas
Authors: Setiawan R 
Published: October 2023

Abstract
Resources are assets as well as important capital owned by each region. Resources can be a determinant in the success of the development. The former Banyumas Residency is an area that includes the Regencies of Banyumas, Banjarnegara, Cilacap, and Purbalingga. Every year the value of GRDP for each regency always increases even though there is still inequality. The GRDP of the Cilacap Regency is much higher than other regencies because of the high value-added and dependence on the manufacturing sector. Development in the former Banyumas Residency requires efforts to focus on sectors that can develop. This study aims to examine the leading sectors that become potential economic resources and the pattern and structure of economic growth in each regency from 2015 to 2019. The method used is the Sectoral Contribution Index (IKS), Location Quotient (LQ), Classic Shift Share, and Klassen Typology. The leading sectors in each regency are different. Construction is the leading sector in Banyumas Regency; agriculture, forestry, and fishery sectors in Banjarnegara and Purbalingga regencies; and the manufacturing sector in Cilacap Regency. The pattern and structure of sectoral growth in each regency also differ based on the Klassen typology.
Analysis of Social and Environmental Vulnerability Against Landslides Using Scoring and Weighting Methods at Probolinggo District
Authors: Pribadi Cherie Bhekti , Himawan Farhan 
Published: October 2023

Abstract
Landslides phenomena majority occur in area which is adjacent with mountain or hill where the soil and rock structure move down the slopes. It is caused by land instability such as loss of plants or trees in highland which have function of binding soil grains while maintaining pores of soil beneath. Based on data from the Regional Disaster Management Agency (BPBD), one of districts/cities in East Java is categorized as prone against landslides is at Probolinggo District where 108 disaster occurred over 2021. Landslide disasters certainly have an impact on the environment and social aspects in vicinity. Therefore, this research aim to assess areas which has prone level against landslides in terms of social and environmental vulnerabilities through analysis of potential for landslide disasters in Probolinggo District. The research using weighting parameter methods in order to obtain the level of social and environmental vulnerability. It is divided into four categories namely low, medium, high, and very high. Maron sub-district become the largest area with very high level of social vulnerability about 33.7% of the area of one sub-district. Meanwhile, in area of environmental vulnerability which is dominated by very high levels of vulnerability is at Krucil sub-district about 88.5% of the area of one sub-district.
Land transportation influence on the spatial distribution of Lead (Pb) in urban soils of Yogyakarta, Indonesia
Authors: Magno J L , Budianta W 
Published: October 2023

Abstract
Land transportation is a vital component of urbanization to promote economic activities in the society. But land transportation is also one of the major contributors of Lead (Pb) contamination in urban soils that might affect the health of the population. This study aims to look at the perspective of land transportation influence to spatial distribution of Pb in metropolitan Yogyakarta. We obtained 168 unique samples in grid manner and quantified its Pb concentration using ICP-AES. In relation, Inverse distance weighted (IDW) geostatistical technique is utilized to produce a spatial distribution map of Pb concentration and correlated to road density, traffic points, and transportation points perspective as a context of influence. The findings show that Yogyakarta City as highly urbanized and more land transportation activities compared to Sleman and Bantul regencies is a place of Pb contamination hotspots. Traffic areas, and Transport areas (e.g., fuel station, terminals, stopover hubs) are amplifying components of land transportation in the context of influence. Thus, land transportation sustainable urban planning is critical to address its growing influence in Pb spatial distribution in urban that might lead to population health issues upon circulating through food, air-breathing, or drinking.
The water balance analysis of several land uses in Tinalah sub-watershed, Kulon Progo
Authors: Amalia M , Kusumandari A 
Published: October 2023

Abstract
Tinalah sub-watershed has vulnerable to the threat of erosion and landslides. Erosion in the upstream watershed can trigger catastrophic flooding in the area below it. In addition, the problems that occur every year in the Tinalah sub-watershed are drought during the dry season and flooding during the rainy season. The water balance was analyzed by using Thornthwaite and Matter. The result shows that the dry index increased from June and the highest is in August. The highest runoff is in June (0.93). Mostly the land uses have deficit water during 4 months that are June to September, except the mixed planting has 3 months of deficit, whereas the area of the settlement has a longer deficit until 5 months. The simulation of land use in an agroforestry system shows the decreasing value of the deficit which then it will affect the value of the Drought Index (Ia) which also decreases.
Contribution of the Agricultural Sector in Green Space Sleman Regency
Authors: Harini Rika , Dairina Isnaini , Widantara Khrisna Wasista , Setiawan Ragil , Ayu Marinda Mustika , Ichsan Dimas Maulana 
Published: October 2023

Abstract
Sleman Regency is the largest producer of agricultural commodities in Yogyakarta Province. This study aims to examine the development of the agricultural sector’s contribution, identify the spatial distribution of the agricultural sector as part of green space, and analyze the trend of the agricultural sector’s contribution to the area of green space in Sleman Regency. The data used is secondary data in the form of GRDP data from BPS and land use area from BAPPEDA. The results show that income from the agricultural sector has increased. Still, its contribution to GRDP has decreased, as evidenced by the analysis of location quotients (LQ) as a non-basic sector. The area of agricultural land, including shrubland, vacant land, irrigated rice fields, rainfed rice fields, gardens, forest, and moor area, has decreased to 58.51% of the total area. This change has been caused by population growth and massive urbanization over the last few years and shows that the role of the agricultural sector in green space has decreased but still does not exceed the limit set by law.
Use of Sustainable Transport System Approach in Tourism Zone Development at Kupang City
Authors: da Costa Don Gaspar Noesaku , Naikofi Mauritius Ildo Rivendi , Manubulu Christiani Chandra 
Published: October 2023

Abstract
The augmentation of high scale social-economic activities usually triggers a great number of small-scale derived activities. However, the presence of such activities has been ignored in traffic impact analysis. The crowded traffic produced surround it then became a laten issue. This study aim is to determine the effect of roadside friction to road capacity and to provide adequate parking zone. Subsequently, this research also discusses the possible implemented solution based on land use availability and/or road environmental condition. Therefore, the traffic volume and geometrical survey have been carried out, and the road segment capacity was calculated using Indonesian Highway Capacity Manual, whereas the effect of varying roadside friction level to road capacity were simulated under 3 conditions, i.e.: 1) without on street parking, 2) with one side on street parking, and 3) with two side of on street parking. It was found that: 1) high level of roadside friction due to the existing on-street parking vehicle and pedestrian as well as entry-exit vehicles produced strongly influenced road capacity, degree of saturation 2) since only one side on street parking is allowed, then the authority should provide additional parking zone by convert potential land into off-street parking zone.
Analysis of Rainfall Variability and Shifts in Season in Relation to the Rice Cultivation Period in Sleman Regency
Authors: Firdauzi L B , Suarma U 
Published: October 2023

Abstract
The research aimed to determine seasonal rainfall variability in Sleman Regency to determine shifts in season in Sleman Regency, and the relationship between the shift in season and rice cultivation period in Sleman Regency. The method was the coefficient of variation to determine seasonal rainfall variability. The shift in season was analysed in 10-year periods. The relationship between the shift in season and the rice cultivation period was analysed using the Chi-Square test. The result of this research showed that the rainfall variability in the dry season was higher than that in the rainy season in Sleman Regency from 1990-2019. The dry season in 2000-2009 came 10 days earlier in 6 subdistricts. The dry season in 2010-2019 was delayed in a period of 10-50 days. The rainy season in 2000-2009 came 20 days earlier in 7 subdistricts, delayed in a period of 10 days in 3 subdistricts. The rainy season in 2010-2019 was delayed in a period of 10 days in 8 subdistricts. The Chi-Square count was greater than the Chi-Square table, meaning that there was a relationship between shift in season and rice cultivation period in Sleman Regency.
Analysis of sanitation system and coliform number in groundwater in Wonosari District, Gunungkidul Regency, Indonesia
Authors: Afifudin  , Widyastuti M. 
Published: October 2023

Abstract
Sanitation visualizes the environment’s health status, comprising housing, sewage disposal, and clean water provision. In general, sewerage can have on-site and offsite sanitation facilities. The research was conducted to characterize the sanitation system for sewage disposal, determine the water quality from biological parameters, and enumerate coliform bacteria in groundwater for every sanitation system observed in Wonosari District, Gunungkidul Regency, Indonesia. These sets of information can help detect groundwater contamination by coliform that reflects the sanitary characteristics of the sewage disposal to be further considered in sanitation management and treatment policies. The research used purposive sampling, field surveys, interviews with a questionnaire, laboratory analyses, and a descriptive-comparative design. The results showed that the sanitation system for sewage disposal at the study site consisted of individual septic tanks and wastewater treatment plants (WWTPs). In terms of quality, the coliform counts exceeded the existing standards, with the highest presence found in groundwater downstream of improperly maintained WWTPs and substandard septic tanks close to other sources of pollutants.
Analysis of the Effect of Land Cover Changes on the Runoff Dynamics Using the HEC-HMS Model in Gajahwong Watershed, Yogyakarta
Authors: Ayumi Nur , Christanto Nugroho 
Published: October 2023

Abstract
The Gajahwong watershed is part of the Opak watershed. The development of urban areas in the Opak watershed is very massive. The development of the urban regions in the Gajahwong watershed is the occurrence of land conversion from non-built land to built-up land. The land cover change will result in changes in the hydrological response of the watershed. The results showed that in the Gajahwong watershed, there was a decrease in agricultural land in the Gajahwong watershed, which was initially 30,209 km2 in 2016, down to 20,204 km2 in 2020. Agricultural land declines due to the conversion of functions to built-up land. Built-up land in the Gajahwong watershed increased by 4,483 km2. This condition resulted in an increase in the CN value in the Gajahwong watershed from the original in 2016 having a CN II of 73 and then increasing to 74. The results show that in 2016, the Gajahwong watershed had a peak discharge of 14.9 m3/s; in 2020, the peak discharge in the Gajahwong watershed decreased to 11.8 m3/s. The volume runoff in the Gajahwong watershed also reduced from 2880.21 mm in 2016 and then in 2020 to 2011,39 mm.
Analysis of Total Maximum Daily Loads of Winongo River, Special Region of Yogyakarta, Using Water Quality Analysis Simulation Program (WASP)
Authors: Indrastuti A N , Widyastuti M , Fadlillah L N 
Published: October 2023

Abstract
A total maximum daily load (TMDL) is the amount of a pollutant load that a waterbody can accommodate without exceeding the water quality standard for that particular pollutant. The research aimed to measure pollutant loads in the Winongo River, TMDLs, and pollutant reduction needed if pollutant loads were higher than TMDLs. The Water Quality Analysis Simulation Program (WASP) model was used to determine water quality responses to the potential amounts of pollutants discharged into the river, resulting in information on existing pollutant loads. After testing the water quality parameters, it was found that pH and BOD at points 2–7 and TDS at all the sampling points meet the standards for Class 1 water per the Governor Regulation No. 20 of 2008. The WASP model showed a total pollutant load of 51,78 kg/day and a TMDL of 139,08 kg/day. Segment 1 had the lowest pollutant load of 2.57 kg/day, then the TMDL was 4.56 kg/day. The highest pollutant load measured was found in segment 6 of 20.11 kg/day, then the TMDL was 79.13 kg/day. Based on the results, the Winongo River can accommodate the pollutant loads while maintaining the water quality.
Application of MODIS land surface temperature data on ENSO-based analysis in Kalimantan
Authors: Zahra R A 
Published: October 2023

Abstract
El Nino Southern Oscillation as climate anomaly has been impacted Land Surface Temperature (LST) in Indonesia. Higher temperature during El Nino has been considered to give more risk in fire hazards in Kalimantan, thus, analysis of spatial and temporal distribution of LST became crucial. This study aims to analyze the spatial and temporal distribution of land surface temperature in Kalimantan based on the ENSO phases from 2014 to 2020. MODIS MOD11A1 images and ONI index were used as analysis materials. Image processing was conducted by selecting pixels using the QC band and then processing the LST values using a scale using RStudio software. The result shows the distribution of higher LST values on the southern side of Kalimantan, influenced by low elevation, peat soil, and land use change. The temporal distribution shows a tendency for higher temperatures in the dry months of August to October, with an increase of 4.5 percent during El Nino and a decrease of 0.9 percent during La Nina from 2014 to 2020. This study could contribute to management and mitigation for fire risk in certain area and period as ENSO occurred in Kalimantan.
Macro fungi in Urban Forest of Universitas Gadjah Mada and Their Potential Uses as Medicinal Fungi
Authors: Anggara G , Rahayu S , Nurjanto H H 
Published: October 2023

Abstract
Macro fungi are important ecosystem component, containing carbohydrates, fibers, proteins, vitamins, and have enormous medicinal purposes. Previous study stated some medicinal macro fungi were found on Lawu Mountain. These species can become alternative source of healthy food to increase human’s immunity. Another study found macro fungi growing in the urban forest of UGM, but studies on their medical benefits have not been conducted yet. This research aimed to understand macro fungi which has potential uses as medicinal fungi in urban forest of UGM. Literature review was done to identify the medicinal purposes of macro fungi in urban forest of UGM. The result shows 15 fungus in urban forest of UGM are able to be natural source of medicine, Agaricus, Auricularia, Ganoderma, Mycena, Earliella, Microporus, Poria, Pycnoporus, Trametes, Schizophyllum, Stereum, Tremella, Pleurotus, Tricholoma, and Xylaria. According to this information, urban forest of UGM has potential to be source of medicinal macro fungi which can be developed as a source of high-quality fungal genetics through pharmaceutical research. Moreover, this research can be used as consideration in making management policies of urban forest of UGM so that the medicinal macro fungi can be used as source of food and for advanced research purposes.
The effect of the eruption of mount Hunga-Tonga on density altitude, air pressure and flight operations in eastern Indonesian
Authors: Ismanto Heri , Hidayati Sabitul , Setia Budi Firman 
Published: October 2023

Abstract
There was an eruption of the Hunga Tonga volcano in the Pacific Ocean on January 15, 2022 and produced the phenomenon of Shock Waves in the atmosphere, in addition to sonic booms, and tsunami waves that spread to various parts of the world. Data from the automated weather observing system (AWOS) in several Airports in Indonesia were analyzed to assess the impact of the eruption of Mount Tonga on the Indonesian atmosphere. There are sudden changes in air pressure (QNH) at locations (Airports) including Sorong, Wamena, Ternate, Sumbawa, Biak, Geser, Lombok, Sabu, and Kupang, with a range between 0.6 to 1.9 Mb. These atmospheric waves propagate at a speed of about 1248 km/hour. This drastic change in air pressure is not followed by a significant change in density altitude which affects the effectiveness of the aircraft’s lift, but a sudden change will cause a change in air pressure (QNH) in the altimeter which can cause a change in aircraft altitude. This sudden change has high probability to result in a plane crash due to a stall or undershoot or collision with aircraft.