bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Lead (Pb) and Cadmium (Cd) heavy metals in cow’s milk in Central Java, Indonesia
Authors: Rachmawati Siti , Candraningtyas Callista Fabiola , Putra Chandra Digta Hanggara , Fadhilah Ririn Nur , Muazulfa Tsalatsun Ikhwa , Firmansyah Fathoni , Suryadi Iwan 
Published: March 2024

Abstract
The need for animal food is increasing because of its nutritional content. Foodstuffs needed to meet daily needs must be healthy and free from harmful substances, including heavy metals. Fresh cow’s milk is an animal-based food that is consumed by many people because it is very easy to find at an affordable price. This study aimed to determine the levels of heavy metals Pb (Lead) and Cd (Cadmium) contained in fresh cow’s milk and to find recommendations if they exceed a predetermined threshold. The method used is laboratory analysis of heavy metal content in fresh cow’s milk from a cattle farm in Boyolali Central Java. Analysis of Pb and Cd content was carried out by Atomic Absorption Spectroscopy (AAS). Data analysis was carried out by comparing the content of heavy metals in fresh cow’s milk with SNI 3141.1: 2011 concerning quality requirements for fresh cow’s milk and SNI 7387: 2009 concerning the maximum limit of heavy metal contamination in food. Laboratory test results on fresh cow’s milk had a heavy metal Pb content of 96.67 mg/kg and a heavy metal Cd content of 4.45 mg/kg. It is known that the maximum limit for heavy metal contamination in food is 0.02 mg/kg. It can be concluded that the heavy metal content in fresh cow’s milk has exceeded the existing quality standard threshold. Previous research revealed that the metal lead content in cow’s milk that has been processed is lower than in cow’s milk that has not been processed.
Land management without burning and corn productivity enhancement during long dry season in West Kalimantan, Indonesia
Authors: Hatta M , Widiastuti D P , Warman R , Haloho J D 
Published: March 2024

Abstract
In long dry season (El Nino), thousand hectares of agricultural land in Indonesia to experience drought, and sometimes wildfires occur naturally. Land management without burning and environmentally friendly agricultural cultivation needs to be done in the long dry season. It is not recommended to use crop residue that is burned on the land, since the residue can be composted into organic matter which later is returned to the agricultural land as organic fertilizer. Currently, about 40% farmers use local corn varieties. Corn farming lands in Indonesia are generally deficient in nitrogen. Consequently, drought tolerant new superior corn varieties complemented with right dose fertilizer based on plant needs, especially N fertilizer, are needed to increase corn productivity in the dry season. This research aimed to ascertain adaptive hybrid corn varieties and right N fertilizer rate on the growth and productivity of corn planted on the land without burning. The experimental design was Randomized Complete Block Design consisting of 2 factors. The first factor was corn varieties, namely Bima 19, Nasa 29, and JH 21; whereas, the second factor was N fertilizer rate, namely 64, 86.5, 109, and 131.5 kg ha-1. The combination of the two factors consisted of 12 treatments, which were repeated 3 times. The results showed that there was an interaction between the new high yielding varieties and the N fertilizer rate on corn productivity. Greater yields were performed in Bima 19 with N rate of 109 and 131.5 kg ha-1 and Nasa 29 with N rate of 131.5 kg ha-1 i.e., 8.45, 7.94, and 8.04 t ha-1, respectively. Bima 19 and Nasa 29 are drought tolerant high yielding corn varieties.
Trekking tourism in the ancient Bengawan Solo valley based on ecological preservation and safety risk management
Authors: Nugroho Purwanto Setyo , Winarto Yosafat 
Published: March 2024

AbstractThe Ancient Bengawan Solo Valley (Lembah Bengawan Solo Purba/LBSP), located in Wonogiri Regency, Central Java, Indonesia, has the potential to be developed for nature tourism. With its beautiful landscapes, unspoiled karst caves, and diverse culinary and cultural arts, the valley is becoming an increasingly popular destination for adventurous travelers and nature enthusiasts. However, to ensure a memorable and safe experience for visitors, and to maintain the sustainability of tourism activities, careful planning is essential. In this article, we explore the importance of safety risk assessment in the process of planning trekking routes for the Bengawan Solo Ancient Valley tour. Qualitative descriptive method is used in the discussion and analysis. The development of the Bengawan Solo Ancient Valley tourism trekking route needs to apply Safety Risk which is in line with the concept of environmental preservation
Sustainable development study of the post-disaster housing resettlement case in Yogyakarta Province, Indonesia case study: Nglepen Village and Pagerjurang Village
Authors: Setyonugroho Gregorius Agung , Maki Norio 
Published: March 2024

Abstract
According to Government Regulation No. 21 of 2008, chapter 67, article 3, the Government of Indonesia promotes community involvement in the post-disaster housing recovery act. The resettlement case in Nglepen Village and Pagerjurang Village is categorized as a rapid and massive recovery based on a contractor-based strategy due to limited land availability, budgetary constraints, post-disaster emergency conditions, and the government’s responsibility to provide large numbers of sufficient housing units. In specific circumstances, the condition of the relocation houses will typically not be able to meet the needs of most residents. This study emphasized the sustainable development of the two case studies and highlighted different private residential housing types: 1) a dome-shaped reinforced structure house in Nglepen and 2) a conventional reinforced concrete structural frame house in Pagerjurang. The two different structural housing system types will affect the sustainable development of the housing condition. Field surveys and interviews were conducted in 2022–2023 to collect the primary data, and study of literacy was used to support the findings and analyzed through a descriptive qualitative method. The sustainable development in the case study relocation area is mainly influenced by aspects such as the economic sector, development priorities related to the residents’ activities and needs, and the adaptive design strategy between old and new buildings. According to the disaster management law and derivative regulations, the Government of Indonesia has sought ideal conditions for disaster-affected residents in the relocation and reconstruction processes. The study’s conclusions suggested that the government, beneficiaries, and all stakeholders must collaborate to improve post-disaster housing and settlement relocation planning and reconstruction in the future by involving the residents in the process of deciding on the location, managing the development, and creating comprehensively sustainable development guidelines for the people’s houses and its living environment.
The study of soil organic carbon rate in Gunungsewu Karst Area, Pracimantoro District
Authors: Rafi F M , Danardono  
Published: March 2024

Abstract
Karst landscape has a notable role in carbon cycles. The role isn’t merely through the karstification (solutional) process but also on soil since Soil Organic Carbon (SOC) is the biggest terrestrial organic carbon stock. The purpose of this research was to discover characteristic and calculate organic carbon within rainfed paddy, dry land seasonal crops, shrubland, and homogenic forest in Gunungsewu Karst, Pracimantoro District. The soil sampling method was determined by purposive, then computed through a laboratory test to figure out the soil texture, permeability, bulk density, particle density, porosity, and organic carbon percentage. C-organic assessment refers to the calculation by National Standardization Agency. Permeability is the obvious parameter that was discovered. Soil permeability in the agricultural land uses has a higher value than in non-agriculture land uses. This matter is caused by soil tillage as a human agriculture activity. The result of the SOC assessment is that non-agriculture land use has a higher rate than agriculture land use. SOC within the homogenic forest was the highest rate (30,03 tonnes ha-1), and the dry land seasonal crops was the lowest rate (18,9 tonnes ha-1), whereas the rainfed paddy and shrubland, respectively 21,63 tonnes ha-1 and 23,62 tonnes ha-1. It caused by the litter on the agriculture land use was slightly than the litter that piled up on the non-agriculture land use because the land was tillage and cleaned as an agriculture activity. Research like this should be undertaken in order to gain information about soil or karst roles within carbon cycles as a mitigation to climate change.
Landslide risk reduction for sustainable land use direction in Tawangmangu District, Karanganyar Regency year 2023
Authors: Nugraha Setya , Utomowati Rahning , Saputra Aditya Eka , Saputri Arlina Bunga 
Published: March 2024

Abstract
Tawangmangu District, Karanganyar Regency has an area of 7,002.94 Ha consisting of 10 villages. Topographically located on the western slope of Mount Lawu with a predominantly steep slope, which has an altitude between 655 m and 3,265 meters above sea level. The development of agribusiness-oriented dryland agriculture, natural tourism destinations, and the establishment of residential buildings that increasingly provide job and business opportunities so that there is an increase in government income and surrounding communities. This condition impacts population pressure on land, so the risk of landslides is thought to be higher. Areas prone to landslides are in the central part of Bandardawung Village, Along Village in the west and central regions, Plumbon Village in the middle and east, and Tengklik Village in the west. The study’s purpose, located in Tawangmangu District, Karanganyar Regency, is to determine the reduction of landslide risk for sustainable land use. Descriptive quantitative research methods include determining area function, vulnerability, vulnerability, and landslide risk using scoring and weighting of observation data. The results of the research show that villages that have a high risk of landslides are areas that have a high risk of landslides, namely Blumbang Village, Kalisoro Village, and Tawangmangu Village.
Subsurface structures identification at Bandung Basin based on gravity data
Authors: Koesuma Sorja , Hamida Izzuki , Handayani Lina 
Published: March 2024

Abstract
One of the metropolitan areas in Indonesia, Bandung Basin, is also known to have a high risk of disaster due to geological conditions and fault structures. In order to identify subsurface structures and fault locations, a study was carried out using the gravity method. By utilising TOPEX satellite data, subsurface modelling is performed using the forward modelling method. Based on the modelling results, the Bandung Basin is known to be dominated by young volcanic products such as tuff and lava with a density of 2.2 to 2.65 gr/cm3. However, sedimentary rocks with a density of 2.4 to 2.7 gr/cm3, such as sandstone, clay, and breccia, dominate in the western region of the basin. It is also known that there are indications of the presence and types of faults that cross the basin area based on the residual anomaly of gravity and also 2D modelling
Exploring green office buildings at Sebelas Maret University: A study on students’ perception
Authors: Subarno A , Winarno  , Ninghardjanti P 
Published: March 2024

AbstractIndoor environmental quality (IEQ) can positively influence occupant satisfaction levels in green-rated buildings. IEQ determines how occupants perceive the interior environment. This study investigated students’ perceptions of green office buildings at Sebelas Maret University. Sixty-eight respondents were involved, consisting of 15 male and 53 female students. Four green office building indicators, namely building features, financial support and commitment, health and well-being, and image and branding, were used as predictor variables, while corporate social responsibility was the dependent variable. Pearson correlation was used for the validation test, and Cronbach’s alpha was used for the reliability test (α = .05). The data were analyzed using multiple regression, taking into account prerequisite tests including normality, linearity, heteroscedasticity, multicollinearity, and autocorrelation. All items were valid and reliable, and all prerequisite tests were met. The results showed that the four independent variables simultaneously have a significant influence on corporate social responsibility (F = 25.78, p < .05). Partially, three predictor variables have significant correlations with the dependent variable: building features (t = 2.86, p < .05), health and well-being (t = 2.03, p < .05), and image and brand (t = 5.16, p < .05). The variables of financial support and commitment have no significant effect on the dependent variable (t = -.32, p > .05). The adjusted R squared value is 0.60, which means that the four independent variables affect the dependent variable by 60%, and 40% is influenced by other variables not included in this study.
Thermal comfort and the influence of dress culture analysis based on temperature humidity index in Pontianak
Authors: Arini A C , Harjanti D T , Apriliyana M I 
Published: March 2024

AbstractIn recent decades, global warming has resulted in rising temperatures worldwide, including in equatorial regions. Pontianak, situated precisely on the equator, faces environmental challenges such as high rainfall, frequently exceeding comfort tolerances in air temperatures, intense solar radiation, and persistent high humidity, impacting thermal comfort. The primary goal of this research is to evaluating thermal comfort conditions in Pontianak, primarily utilizing the Temperature Humidity Index (THI) as a key indicator. The study also investigates the influence of local dress culture and clothing choices on thermal comfort. To further measure the level of thermal comfort in Pontianak, the Temperature Humidity Index formula developed by Nieuwolt was employed. The analysis revealed that, on average, the THI during daytime was 32.87°C, indicating some discomfort perception. This is consistent with the opinions of the local community, who often express discomfort with the thermal conditions in Pontianak. These conditions also affect the clothing choices of Pontianak’s residents. Factors such as material, size, and color are among the main considerations for selecting clothing. Nevertheless, the selection of clothing ultimately depends on the body’s response to the thermal conditions in Pontianak, aiming to minimize the impact of the prevailing thermal conditions.
Willingness to pay for flood risk mitigation among residents living near river’s confluence in Yogyakarta, Indonesia
Authors: Saptutyningsih Endah , Nursetiawan  
Published: March 2024

Abstract
Both property buyers and owners are concerned about the impact of flooding on residential property price. Although several studies have investigated the possibility of property devaluation in flood-prone areas, there are still few that have looked into the effects of flooding on residential properties in Sriharjo, Imogiri, Indonesia. This study aims to examined housing characteristics such as structure, neighborhood, and environment on residential property value. We also created an interaction variable between flood and structural attributes to see whether the impact of flood inundation on property value varies depending on the age of the building, the size of the building area, and the number of bedrooms. Using the hedonic pricing model, we found that flooding reduces the market value of residential property value. The characteristics of property like land square, building square, building age, and number of rooms have influence on property price. The characteristics of neighborhoods are also influence to property price such as distance to city, distance to main road, distance to school and distance to the river. Only one environmental characteristic which influence to property price is height of flood inundation. We discovered that, on average, a rise in the amount of flood inundation decreased property prices in the research region by.015% by using a two-stage estimating approach to evaluate these associations. We calculated IDR 698,500 as the marginal implicit cost of reducing flood inundation. According to subsequent estimates, homeowners would be ready to pay an extra 0.685 percent for a decrease in flood inundation. The study’s findings will help property owners better understand the elements that contribute to property depreciation due to floods. This paper also suggests flood insurance plans since flooding is a significant issue for real estate owners.
The Influence of Socio-Economic Facilities and Population Density on Landuse Changes in Gunungpati District, Semarang City
Authors: Baskoro Wempy , Amin Choirul , Taryono Taryono 
Published: March 2024

Abstract
Land use still serves as a guide for urban development decisions, even though they are typically independent. Establishing important corporate hubs has made economic considerations a key driver in determining how the city’s land-use structure will be governed. The study investigates the influence of socio-economic facilities and population density on land use changes in Gunungpati district, Semarang City. The data processing technique used in this study was to make a map of the administrative area of Gunungpati District. The following data processing stage digitizes Gunungpati District images in 2011 and 2019 to determine land use. Then carry out the overlay process on the two land use maps of the Gunungpati District to find out changes in land use in 2011 and 2019. Qualitative data analysis was used in this study. The findings of land change map overlays between 2011 and 2019 were used for qualitative data map analysis. The findings demonstrate that settlements, which account for 2,255 hectares of land in Gunung Pati District, dominate land use, with Pakintelan Village having the highest residential land use. At the same time, the most minor land use is in the service sector, namely as much as 590 Ha. Land use in Gunungpati District in 2019 was dominated by residential land, namely 2,388 Ha, where the highest residential land use was in Sekaran Village, namely 250.76 Ha. The slightest use of land is on service land, which is 442.51 Ha, with the highest use of service land in Sekaran Village, which is 58.24 Ha. The dominant factors influencing changes in land use are the increase in social facilities and population density, which encourage land conversion and make it a more productive resource.
Analysis of the spread of dengue hemorrhagic fever with the moran index (Case study of Sukoharjo Regency in 2019)
Authors: Puspita M , Hadibasyir H Z , Renika I , Tilova U D N 
Published: March 2024

Abstract
One of the endemic diseases that can be found in tropical areas is DHF or Dengue Hemorrhagic Fever (DHF). Dengue fever can be transmitted through Aedes aegypti mosquitoes that have been infected with the dengue virus. It is estimated that the level of dependence on DHF is always related to the infected area around it. DHF can spread to other people through mosquito bites. Sukoharjo Regency in 2018 recorded 35 cases of DHF sufferers and zero patients died. Increased up to 90% in 2019, there were 317 cases of dengue fever and 10 patients died. Therefore, the purpose of this study is to determine the autocorrelation of the spread of DHF in Sukoharjo Regency in 2019. This study used data on the number of DHF sufferers per subdistrict in Sukoharjo Regency in 2019. The research method used the calculation of the Moran Index. Calculation of Moran’s Index produced a value I = -0.181. Moran’s index value is in the range - 1≤I< 0 so that it indicates a negative autocorrelation. The correlation is classified to be a weak relationship. Negative spatial autocorrelation values indicate locations that are close to each other have values that are not close together. Subdistricts with a high number of sufferers tended to be irregular.
Comparison of the application of HBV and HEC-HMS hydrology models for accessing climate change in the upper Citarum Watershed, Indonesia
Authors: Ningrum Widya , Apip  , Narulita Ida 
Published: March 2024

Abstract
Hydrologically, the upper Citarum watershed was critically damaged. This study propose to compare HBV and HEC-HMS model performance for estimating discharge in upper Citarum watershed. Besides, this study wants to know changes in discharge in the future as a result of climate changes. Discharge simulation was carried out with the HBV and HEC HMS models in the period 2006-2007 as calibration and 2008 as validation. Meanwhile, future discharge changes are calculated in 2045 based on climate model projections output from CORDEX namely MPI, CNRM, EcEarth, and CSIRO. Model performance is calculated based on the value of statistical bias, NSE, and correlation. The results showed that HEC-HMS model has bias, NSE, and corellation value of 6.33, 0.57, and 0.8. Whereas, the HBV values are 3.67, 0.61, and 0.76. Therefore, based on NSE and bias value, the HBV model performs slightly better than the HEC-HMS in upper Citarum watershed. There are an increase in the daily discharge by RCP4.5 scenario. In contrast, the daily discharge by RCP8.5 decreased in upper Citarum.
Micro-Zonation of hot spring manifestation site at Umbul Niti, South Lampung based on microtremor
Authors: Putri Intan Andriani , Paembonan Andri Yadi , Irawati Selvi Misnia , Ekawati Gestin Mey , Yudistira Hadi Teguh , Laesanpura Agus 
Published: March 2024

Abstract
In 2021, an intriguing event unfolded at Umbul Niti village when a resident’s well drilling endeavor unexpectedly yielded to a hot spring, thus transforming the site into a small local tourist attraction that captivates visitors and enhances local economies. However, it is crucial to prioritize the safety of visitors and infrastructure, considering the geological implications of hot springs are related to unstable weak zones that would be severely damaged when an earthquake strikes. Weak zones often exhibit heightened susceptibility to seismic events. Using Horizontal to Vertical Spectral Ratio (HVSR) analysis of micro-tremor data that was recorded for 40 minutes at 25 locations, the Amplification (A
0) and Natural Frequency (f
0) were obtained; then the Seismic Vulnerability Index (Kg
) were calculated. The study area has a dominant frequency of around 4.74 - 9.7 Hz indicating the dominance of hard Tertiary Type I soil from Lampung Formation (QTI). Kg
value ranges from 0.08 - 3.57 interpreted as mostly low hazard level. However, in the NW - SE direction the value indicates a high Kg
value which means a relatively high hazard level, passing through the hot spring location. Thus, the area at the NW-SE zone might require more specific treatment.