bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pyroreflectometry as a technique for the accurate measurement of very high temperatures in molten materials
Authors: Turquais Benjamin , Sans Jean-Louis , Davoust Laurent , Delacroix Jules , Journeau Christophe , Piluso Pascal , Chikhi Nourdine 
Published: September 2022

Experimental research into severe nuclear accidents often requires the accurate measurement of high temperatures of molten materials. Measurements of very high temperatures (1500–2500 °C) in liquid materials using standard pyrometry can entail uncertainties in the order of 5%–10%. Pyroreflectometry is a powerful technique with the potential to significantly reduce these uncertainties. A method is proposed to optimize pyroreflectometry temperature measurements in the 1500–2500 °C range and to allow more easily the detection of the solid–liquid phase transition. The originality of this research essentially relies on the use of pyroreflectometry based on two wavelengths (1.3 and 1.55 μm) and its application to liquid materials at high temperature, which implies to adapt technological elements and metrological procedures. The proposed procedure first requires temperature calibration, which is undertaken using three eutectic fixed-point cells, reducing temperature uncertainty. Second, precise settings are adopted to enable reflectivity measurements on specular surfaces, such as the surfaces of molten metals. Pyroreflectometry measurements on liquid surfaces have been validated on an iron sample. Subsequently, the application of pyroreflectometry at very high temperatures was validated on various materials: metal (iron and 18MND5 steel), oxide (alumina), and carbide (rhenium–carbon eutectic). For each of these samples, the uncertainties of temperature measurements in the 1500–2500 °C range were estimated in the range of 1%–2%, performing well against standard pyrometry measurements. The principal difficulties encountered during the pyroreflectometry characterization were the fine-tuning of parameters (optical head orientation and lens focusing) to enable measurements on highly specular surfaces and ensuring inert interactions between the samples and the crucible.
The open Haldane–Shastry chain: thermodynamics and criticality
Authors: Finkel Federico , González-López Artemio 
Published: September 2022

Abstract
We study the thermodynamics and criticality of the su(m|n) Haldane–Shastry chain of BC

N
type with a general chemical potential term. We first derive a complete description of the spectrum of this model in terms of BC

N
-type motifs, from which we deduce a representation for the partition function as the trace of a product of site-dependent transfer matrices. In the thermodynamic limit, this formula yields a simple expression for the free energy per spin in terms of the Perron–Frobenius eigenvalue of the continuum limit of the transfer matrix. Evaluating this eigenvalue we obtain closed-form expressions for the thermodynamic functions of the chains with m, n ⩽ 2. Using the motif-based description of the spectrum derived here, we study in detail the ground state of these models and their low energy excitations. In this way we identify the critical intervals in chemical potential space and compute their corresponding Fermi velocities. By contrast with previously studied models of this type, we find in some cases two types of low energy excitations with linear energy-quasimomentum relation. Finally, we determine the central charge of all the critical phases by analyzing the low-temperature behavior of the expression for the free energy per spin.
Variation of Saturation Indices (SIcal) with respect to Calcite Mineral at Kalisirah and Jumbleng Springs, South Gombong Karst, Central Java, Indonesia
Authors: Mahrizkhal D S , Priambada A P , Al-Ghozali M Q , Rahmawati A I , Cahyadi A , Haryono E , Adji T N 
Published: September 2022

Abstract
This research was conducted in two main springs, namely Kalisirah and Jumbleng springs, located on the north side of the South Gombong karst area, Central Java, Indonesia. The objective of this study was to determine the temporal variation of the saturation indices with respect to the mineral calcite in the two springs. Water samples were taken 24 times at each spring during dry, rainy, and flood events. Electrical Conductivity (EC), pH, temperature, calcium (Ca2+) and bicarbonate (HCO3
−) were measured directly in the field, while other major elements such as Mg2+, Na+, K+, SO4
2−, Cl− were analyzed in the laboratory. Furthermore, the calculation of the Saturation Indices with respect to the calcite mineral (SIcal) and carbon dioxide partial pressure (logPCO2) was carried out. The analysis results show that temporally, the SIcal value is generally higher during low discharge (dry season) and decreased during high discharge (rainy season). When compared, Jumbleng Springs has a stronger relationship between decreased discharge and an increase in SIcal. Meanwhile, the variation of SIcal increase (during the dry season) is also followed by a decrease in log PCO2, which indicates the dominance of the calcite precipitation process when the carbon dioxide content in the water is minimal.
Flood hydrograph parameters in the Pindul underground river, Gunungkidul, to characterise the release of stored water from karst aquifers
Authors: Tastian N F , Adji T N , Cahyadi A 
Published: September 2022

Abstract
This research was conducted in the Pindul underground river, a cave tubing tourism site in Gunungsewu Karst, Indonesia. The purpose of this study is to identify flood hydrograph parameters that can be used to characterise how karst aquifer release groundwater storage. The recording of water level fluctuations was carried out with the installation of HOBO U20L-02 (November 2020-August 2021). The discharge measurement was carried out 20 times to create a stage-discharge rating curve. Furthermore, eleven flood events were selected to calculate the recession constant of diffuse (Kb), fissure (Ki), conduit (Kc), time to peak (Tp), and time to baseflow (Tb). The results of the calculation of the hydrograph parameters show the number Kb=0.996, which indicates the slow release of groundwater storage supported by the Tb value = 20.72 hours (long enough). Compared with Kb and Tb values in other karst springs in Java, the Pindul underground river has a slightly slower than average releasing of groundwater storage, although its Tb value is shorter than the average for other karst springs. Meanwhile, based on the Kc value (0.429), the Pindul underground river is faster in releasing its conduit flow which is strengthened by a reasonably short Tp data (3.1 hours).
Assessment of Aquifer Systems for The Sustainable Development of Groundwater Use in The Batutua Groundwater Basin
Authors: Syafarini Hane , Hendrayana Heru , Winardi Sarju 
Published: September 2022

Abstract
Groundwater exploration is an alternative to meet raw water needs because of the increasing water demand and the dwindling surface water availability. Water use continues to increase along with the rate of population growth in the Rote Ndao Regency. Therefore, an initial assessment of the presence of groundwater can be carried out by identifying the groundwater basin area. Batutua is one of the groundwater basin areas occupied by the most population because it is the capital of Rote Ndao Regency. This study aims to identify aquifer systems and flow patterns as the basis for groundwater exploration in the Batutua groundwater basin area. The method used in this groundwater aquifer system study is the Vertical Electrical Sounding (VES) method. The VES method is a geoelectrical method used to investigate the layers of an aquifer by interpreting the current that penetrates the soil using two electrodes and the potential response. Geoelectrical investigations were carried out at 8 points in the Batutua groundwater basin area. The aquifer is found in water-containing coral limestone areas where water flows through fractures as secondary permeability. The groundwater flow direction was obtained by measuring the groundwater levels in 14 dug wells and 24 springs. The research’s area aquifer system is formed by upper shallow aquifer as an unconfined aquifer with a thickness less than 20 m and lower shallow aquifer as a semi-confined aquifer that has clay or marls on upper layer and limestone in below with the flow direction from the East to the West and the North part of the study area.
Flood water hydrogeochemistry characteristics in Pindul Cave, Gunungsewu Karst Area, Indonesia
Authors: Tastian N F , Adji T N , Cahyadi A 
Published: September 2022

Abstract
Pindul cave located in Gunungkidul Regency, Gunungsewu Karst Area, Indonesia has a unique characteristic which is dominated by surface rivers (allogenic recharge) and groundwater (autogenic recharge). The main purpose of this study is to analyze temporal variation of flood water hydrogeochemistry in Pindul Cave. Water sampling for flood hydrogeochemistry analysis is taken in the wet season for three selected flood events. Parameters of hydrogeochemistry analysis consist of major dissolved element (Ca2+ and HCO3
−); conductivity; total dissolved solid; SI calcite; log PCO2; and pH. The result shows that there was correlation between flood discharge and hydrogeochemistry parameters. The hydrogeochemistry of flood events in Pindul Cave typified by a low value of calcium and bicarbonate and high CO2 gas content in water that indicated the dillution by precipitation processes. Pindul Cave also show the negative value of calcite during flood event which mean that groundwater is unsaturated, so it becomes aggressive towards calcite. According to the flood water hydrogeochemistry characteristics, Pindul Cave is dominated by conduit flow from the large-fracture that already developed.
Aquifer connectivity assessment using stable isotope and hydrochemical analysis in the Raimanuk and its surrounding area on the Timor island
Authors: Bukhari A M W , Hendrayana H , Setiawan H 
Published: September 2022

AbstractRaimanuk and its surroundings are a potential agricultural area in Indonesia. Sufficient groundwater in this area was a significant factor for supporting agricultural activities and household needs. Therefore, identifying the aquifer connectivity is essential to determine the groundwater utilization pattern in this area. This research aims to determine the aquifer connectivity based on stable isotopes and hydrochemical from the groundwater and the meteoric water (rainwater). The groundwater samples were taken from ten deep wells, six dug wells, and four springs. While the meteoric water samples were taken from four rainfed locations, samples were analyzed using Los Gatos Research DLT-100, Ion Chromatography Metrohm 830IC, and acid-base titration. The result shows there are four groups of groundwater. Group I is the springs that come from local meteoric water. Group II consists of the dug wells that evaporated and showed a relationship to the meteoric water that falls in higher elevations. Group III was the drilled well groundwater from the local flow system. Furthermore, Group IV is the drilled well groundwater with a more enriched δ18O isotope ratio due to water-rock interaction. Even though they are in a different group, there is a hydraulic connection between Group III and IV.
Analysis of meteorological water availability and water demand in Semarang Regency
Authors: Herdiansyah A R , Zahra R A , Masjoyo Y M , Muhammad A F , Saputra M R , Firdauzi L B , Hafizha K P , Nurjani E 
Published: September 2022

Abstract
Population growths are increasing the demand for water. This can cause an imbalance of water availability to fulfill domestic water demand. Therefore, it is necessary to analyze the water availability and water demand so that water resources are maintained and can fulfill the community needs in the present and future. This research aims to analyze the water availability and domestic water demand in Semarang Regency. The methods consist of calculating monthly rainfall, calculating water balance using F. J Mock model, calculating the water demand regarding to the water availability, and calculating how much water can be obtained from rain harvesting. The results show the highest annual water availability in Semarang Regency is Pringapus district 48,559,764.55 m3/year, while the the lowest is Kaliwungu district 17,352,024.13 m3/year. The highest domestic water demand are in West Ungaran district, East Ungaran district, and Bergas district, while the lowest are in Bancak and Kaliwungu district. The total water demand is 6% of the total water availability, means there is no water deficit in Semarang Regency. The total volume of rainwater harvested is 120,163,412 m3/year which means the volume of rainwater harvested in one year can fulfill the domestic water demand in Semarang Regency.
Urban Heat Island Mitigation Strategy based on Local Climate Zone Classification using Landsat 8 satellite imagery
Authors: Yunita R , Wibowo A , Supriatna  , Rais A F 
Published: September 2022

Abstract
Appropriate strategies on urban climate mitigation should be formulated by considering the physical morphology of the urban landscape. This study aimed to investigate, analyze, and promote possible strategies to mitigate Jakarta’s urban heat island (UHI) phenomena. Jakarta’s local climate zone (LCZ) was classified into 17 classes using Landsat 8 data and the random forest method. Land surface temperature (LST) characteristic in each LCZ class was analyzed from 2018, 2019 and 2020. The result revealed that most of the local climate zone in Jakarta is dominated by LCZ 6 (open low-rise) and LCZ 3 (compact low-rise), which is the typical residential area in Jakarta. However, the mean LST in 2018, 2019 and 2020 showed that LCZ 3 (compact low-rise) and LCZ 7 (lightweight low-rise) are the areas that were most likely causing high surface temperature with the highest UHI intensity. During the COVID-19 pandemic in 2020, LST in Jakarta decreased drastically in some parts of the area, especially in public facility such as airport. However, the LST value in low-rise areas (LCZ 3 and LCZ 7) remains higher than the other LCZ classes. Materials of the building and land cover play a significant role in raising the land surface temperature. Therefore, mitigation strategies for urban heat islands in Jakarta should be focused on such particular areas mentioned.
Trend of The Utilization of COVID-19 Hotline as a Service Provider on Information Regarding COVID-19 in the Special Region of Yogyakarta
Authors: Alfatih M A , Rachmawati R 
Published: September 2022

Abstract
The number of positive cases of COVID-19 in the Special Region of Yogyakarta (DIY) is still increasing every single day. One of the measures which can be taken to reduce the number of positive cases of COVID-19 is to provide credible and valid information services regarding the disease. The information provider service is in the form of an interactive hotline so that people can ask for more detailed information related to COVID-19. The purpose of this study is to identify the provision of information about COVID-19 through the COVID-19 Hotline in DIY and analyze its trend of the utility. The research method used is qualitative with descriptive analysis techniques. There are two types of COVID-19 hotlines operating in DIY managed by the Regional Disaster Relief Agency (BPBD) and the Health Office of DIY. The results obtained from this study are the trend of the number of COVID-19 Hotline users in DIY is fluctuative according to the situation and conditions of the COVID-19 pandemic in DIY. The information submitted to the BPBD DIY COVID-19 Hotline is general information related to the way of handling COVID-19. Meanwhile, more detailed health information and mechanisms for handling COVID-19 can be obtained through the COVID-19 Hotline of the DIY Health Office. Through this research, it can be concluded that the COVID-19 Hotline in DIY can provide the information that the community needs. The most asked category of information was related to health services regarding COVID-19. The trend of the utility of the COVID-19 Hotline can be seen through the spread of incoming calls. The largest number of users is in the city of Yogyakarta. This is due to the highest positive cases of COVID-19 in DIY are in the city of Yogyakarta, so the need for information related to the development of COVID-19 also increases. The difference in the number of COVID-19 calls in DIY in each regency can be caused by the COVID-19 Hotline service at the city and district levels as well.
The Use of Digital Elevation Model in A GIS For Flood Vulnerability: Case Study of Sitiarjo Village Malang District East Java Indonesia
Authors: Hariyono M I , Kurniawan A A 
Published: September 2022

Abstract
The purpose of this research is the use of a Digital Elevation Model (DEM) was used in conjunction with a Geographic Information System to compute morphometric factors influencing flooding vulnerability. These causal factors were subjected to a weighted overlay analysis in order to categorize areas based on their flooding vulnerability. The research location is in Sitiarjo Village Malang District East Java Indonesia. The flood disaster that most harmed the community in Sitiarjo village occurred in 1983, 2003, 2007, 2010, 2013 and 2017. Sitiarjo village is crossed by two major rivers, namely the Panguluran river and the Mbambang river which meet at the river in the southern part of the village.. The results showed that the flood vulnerability of sitiarjo village has a high level in the center of the village (flood plain and fluvial landforms). The greatest flood hazard is at the bottom of the confluence of the Pangluran and Mambang rivers in Rowo Terate Sub Village.
Multi-criteria Decision Analysis for Readiness of COVID-19 Referral Hospital in Jakarta
Authors: Ristiantri Y R A , Susiloningtyas D , Shidiq I P A , Syetiawan A , Azizah F N 
Published: September 2022

Abstract
In early March, Indonesia had reported the first two cases of COVID-19 and this was the beginning for the spread of the COVID-19 outbreak in Indonesia. The need for health services is increasing along with the increasing number of COVID-19 cases in Indonesia. DKI Jakarta is the capital city of Indonesia and is a city with a dense population, causing the transmission of the COVID-19 to be faster than other areas. An assessment of the capacity of health facilities which includes infrastructure and resources is very important to determine the ability of health facilities to manage the rate of spread of COVID-19. This study aims to evaluate the capability of health facilities using the COVID-19 referral hospital readiness index in DKI Jakarta. The data used is the availability of human resources and infrastructure for COVID-19 referral hospitals. Analysis of Geographic Information Systems and Multi-criteria was used to map the readiness index of COVID-19 referral hospitals. The results show that there are no referral hospitals with a high readiness index. There are only 10 referral hospitals with a medium and 92 referral hospitals with a low readiness index. The lack of referral hospitals with a medium readiness index in areas of high vulnerability can have serious consequences in handling COVID-19 cases. Most of the referral hospitals have a low readiness index. However, referral hospitals are capable to reach almost all areas of DKI Jakarta in an emergency condition. It can be concluded that most of the referral hospitals do not have adequate facilities for handling COVID-19 patients.
Questions on integrative framework for environmental protection of full operational status nuclear power plant
Authors: Santosa H , Hadi M , Imarjoko Y 
Published: September 2022

Abstract
Environmental protection is a big issue of NPP technology. Approaches so far have not conducted adequate assessments for severe accidents. Efforts to correct this deficiency are carried out by utilizing the phenomenon of the Fukushima Daiichi NPP accident that has been documented. Relevant aspects were selected to be contributed to the NPP EIA thereby increasing coverage to severe accidents. Content analysis of accident reports and supporting information from international nuclear institutions as well as expert opinion was carried out. The analysis provides results in the form of eight aspects that are suitable to be contributed to the NPP EIA. The correlation between nuclear power generation capacity and environmental radioactive contamination from its accidents and recovery needs is a knowledge challenge that is still being faced. The idea of making the impact of a nuclear power plant accident easy to recover has the potential to be a direction for the development of knowledge and engineering.
Comparative Study of Determination of Landslide Susceptibility Based on Weighting Methods and Analytical Hierarchy Processes in Pringapus, East Ungaran
Authors: Trisnawati D , Najib  , Hidayatillah A S , Robbany A Z , Pellokila Y A L 
Published: September 2022

Abstract
Landslide is a geological disaster that is still an interesting topic to study its behavior and its management, especially for tropical climate regions such as Indonesia. One form of landslide countermeasures is the mapping of landslide susceptibility. The most commonly used landslide susceptibility mapping method is the GIS-based weighting and classification method. In the weighting method, each parameter and class has a definite weight as in the reference for making vulnerability maps that have been issued by BBSDLP (Center for Agricultural Land Resources) and PVMBG (Center for Volcanology and Geological Hazard Mitigation). However, the exact weight of each parameter sometimes does not match the real conditions in the field, so many researchers modify it. For this reason, this study tries to present an accuracy comparison of mapping the vulnerability of land motslide with the weighting method and the Analytical Hierarchy Process (AHP) method. The research location is in the Pringapus and East Ungaran areas, Semarang Regency. The results showed that the mapping of landslide susceptibility using the weighting method showed an accuracy of 77.58% while using the AHP method showed better accuracy of 84.48%.
Geospatial technology for flood hazard analysis in Comal Watershed, Central Java, Indonesia
Authors: Wibowo Y A , Marfai M A , Hadi M P , Fatchurohman H , Ronggowulan L , Arif D A 
Published: September 2022

Abstract
River flood has become a severe disruption toward the community, and it can trigger loss of life, damage infrastructure and properties, suffer economic, social and cultural, and environmental degradation. Flood hazard analysis downstream of Comal Watershed in Pemalang Regency, Central Java, was designed to generate the flood hazard map to reduce the effects of flood disaster. The flood hazard was simulated for five, 10, 25, and 50 years using HEC-RAS and ArcGIS with HEC-GeoRAS. The data input was discharge, geometry, and roughness. The discharge was obtained from hydrology modelling by utilizing daily rainfall data for 22 years. The geometry data was composed of a topographic map and measured using an echo sounder, while the roughness was from land use along the flood plain. The accuracy and validation were conducted by matching the flood modelling result with the historical data from the Pemalang Disaster Management Agency and in-depth interview results with the community. The results showed the Comal River downstream flood hazard was feasible for disaster risk reduction purposes. The flood hazard levels were generated in five, 10, 25, and 50 years return periods dominated by high and very low levels. In every return period, the rising trend of the inundation width and the flood depth occurred for very high, high, and very low levels.