bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Fe doping on structural, optical and magnetic properties of CdS quantum dots
Authors: Moslem Shymaa S , El komy G M , El-Khawas E H , Azab A A 
Published: January 2025

Abstract
Pure CdS nanoparticles and Fe-doped CdS quantum dots (Cd1−xFexS, where x = 0.0, 0.03, 0.06, 0.09, and 0.12) were successfully synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis confirmed the cubic phase structure of CdS without additional peaks, indicating the effective incorporation of Fe ions into the CdS lattice. The crystallite size exhibited a gradual increase with increasing Fe content. High-resolution transmission electron microscopy (HR-TEM) revealed a well-defined spherical morphology for pure CdS, while Fe doping induced notable agglomeration in the quantum dots. X-ray photoelectron spectroscopy (XPS) confirmed the formation of the CdFeS composition and provided insights into the valence states of Cd, Fe, and S. UV–vis diffuse reflectance spectroscopy (DRS) demonstrated a decrease in the optical band gap from 2.29 eV to 2.18 eV with Fe doping, indicating a modification of the electronic structure. Magnetization studies revealed a transition from diamagnetic behavior in pure CdS to ferromagnetic behavior in Fe-doped samples. Additionally, Fe doping significantly influenced the magnetic parameters, including saturation magnetization, remanence, and coercivity. These results highlight the structural, optical, and magnetic properties of CdS can be tuned through Fe doping, making these materials promising candidates for optoelectronic and spintronic applications.
Non-self-similar collapse of three point vortices in a generalized two-dimensional fluid system
Authors: Iwayama T , Yajima T , Watanabe T 
Published: January 2025

Abstract
In this study, we investigate the non-self-similar collapse of three vortices in a point vortex model of a generalized two-dimensional (2D) fluid system. In the classical point vortex model, the existence of the self-similar collapse of three vortices has been well known from Gröbli (1877 Vierteljahresschr. Naturforsch. Ges. Zürich
22 129). Moreover, the non-existence of the non-self-similar collapse of three vortices in the classical point vortex model was proved by Hernández–Garduño and Lacomba (2007 J. Math. Fluid Mech.
9 75) and Hiraoka (2008 Nonlinearity
21 361). In this study, we apply a method similar to that of former authors to the point vortex model of the generalized 2D fluid system, which includes a real parameter α, where

0
<
α
⩽
3

. We present proofs for the possible existence of the non-self-similar collapse of three vortices for

0
<
α
<
2

and for the non-existence of such collapse for

2
<
α
⩽
3

. Furthermore, as an application, we analyze in detail the self-similar and non-self-similar collapses of three point vortices in the symmetric case of the surface quasi-geostrophic system (α = 1). A close relationship between the self-similar and non-self-similar collapses of the three vortices is identified.
Utilization of geospatial technology to monitor vegetation recovery after forest and land fires in 2023 in the Bromo Volcano Area, Indonesia
Authors: Purba Sejati Sadewa , Nuraini Sekarsih Fitria 
Published: January 2025

Abstract
This study was conducted to identify the condition of savannah fields after forest and land fires in parts of the Bromo Volcano area, East Java, Indonesia, in September 2023. The research was conducted through remote sensing technology and integrated geographic information systems. The data used is remote sensing multitemporal data in the form of Sentinel 2 imagery. Sentinel 2 imagery is remote sensing data generated from Sentinel satellite recording. Sentinel 2 imagery was used in this study because it has excellent spatial and temporal resolution. The spatial resolution of Citra Sentinel is 10 meters, and its temporal resolution is ten daily. The data were analyzed using spatial and temporal approaches to determine the condition of the savanna before and after forest and land fires. The software used to analyze the data and visualize spatial information is Google Earth Engine (GEE) and Arc Map Version 10.6. The data analysis methods used include changes in the detection of burned areas using the normalized burn ratio (NBR) method, making fire class classifications based on the U.S. Geological Survey (USGS), post-fire monitoring using the normalized difference vegetation index (NDVI), and monitoring vegetation recovery from post-NDVI values—fires by comparing in different years in the same month using the fishnet method. The temporal months chosen to analyze the recovery process are September, October, November, and December 2023. Based on the study’s results, it is known that in September and October 2023, there has been no vegetation recovery. Vegetation began to look restored in November and December 2023.
The study of temporary rubbish dumps places based on regional zoning in Kupang City
Authors: Theo Tomi Pamungkas Bella , Rahmawati Arfita , Samin Mikael , Hale Manek Agustinus 
Published: January 2025

Abstract
The lack of rubbish dump capacity has led to the emergence of illegal rubbish dumps in Kupang City. Temporary rubbish dumps as transit locations for waste from sub-districts to final disposal places make the role of temporary rubbish dumps. Therefore, to study temporary waste disposal sites in Kupang City. This research examines temporary waste disposal sites based on the zoning of parts of the city area (BWK). This research is quantitative and qualitative. Qualitative data collection techniques used interviews through group discussion forums. Evaluation analysis of temporary waste disposal sites using geographic information systems (GIS) with IDW. The research results show waste accumulation in 2023 in Kupang City will be 2876714.5 L/day. The number of waste piles with the capacity of temporary rubbish disposal sites included in the appropriate category is in BWK I. The very insufficient category is in BWK II, BWK V, and BWK VII. There is a need to build 366 rubbish dumps with a container type with a volume of 6 m3 and 122 rubbish dumps with a permanent type with a volume of 1.5 m3 to overcome the shortage of rubbish dumps capacity in the next five years.
Utilization of Unmanned Aerial Vehicle (UAV) Technology for The Development of Tourism at Larangan Indah Beach Tegal Regency Indonesia
Authors: Rozaq A. , Wibowo A. A. , Anna A. N. , Pramono W. T. , Taroyo  
Published: January 2025

Abstract
Larangan Indah Beach is one of the tourist attractions on the north coast of Tegal Regency, Central Java Province. Based on the 2012-2032 Tegal Regency RTRW regional regulations, the northern coastal area in Tegal Regency is included in the district’s strategic area and has great potential for development, including Larangan Indah Beach. The current condition has not been developed optimally. This research aims to 1) mapping Larangan Indah Beach, 2) determine the internal and external potential found in the coastal area of Larangan Indah Beach and 3) carry out a development plan for Larangan Indah Beach. The research method used in this research is a survey research method by processing aerial photo data, then interpreting aerial photos using field observations and analyzing spatial data for coastal mapping and planning tourism development based on existing potential using internal and external potential scoring. The results of scoring Larangan Indah Beach get a score of 39 which is included in the medium category, showing a good balance between attractions and tourists by making the basis for developing beach tourism areas. Development is carried out by adding attractions such as windmills and ATV rides, as well as improving amenities such as homestays, information centers, parking lots, souvenir stallss and adding road signs.
Suitability analysis of the distribution final evacuation sites for Mount Merapi based on GIS
Authors: Iswidiantono  , Sari D. N. , Taryono  , Mukasyaf A. A. 
Published: January 2025

Abstract
Mount Merapi is a very active volcano and eruptions often occur on a scale that is difficult to predict, thus endangering people on the slopes of Mount Merapi. FES (Final Evacuation Site) and evacuation routes are one of important things to reduce casualties due to eruptions, therefore its location must be in a safe area or outside the DPA (Disaster Prone Area). The objectives of this research are 1) GIS-based disaster vulnerability class modeling in Mount Merapi area. 2) Analyzing the distribution of FES (Final Evacuation Sites) and determining evacuation routes during the eruption of Mount Merapi based on the hazard class zone. The methods used are buffer analysis to model the DPA class, network analysis to determine the fastest route to the nearest residential evacuation site, and overlay to combine the three. DPA zone modeling is based on BPBD rules. The results obtained are maps of evacuation routes and the suitability of FES to DPA. The distribution of FES on the slopes of Mount Merapi covers the entire study area with two FES that are still very close to Kali Putih.
Fish biodiversity in the Kampar watershed: an overview of the potential, threats, and management strategies
Authors: Rusdianto Rusdianto , Haryono Haryono , Gustiano Rudhy , Wahyudewantoro Gema , Hidayatullah Irwan , Anggorowati Rahayu Dwi 
Published: January 2025

Abstract
Kampar Watershed is one of the major rivers in Indonesia, which is divided into Riau and West Sumatra Provinces. Kampar watershed has a high diversity of fish species and has long been utilized to meet the needs of clean water, aquaculture, agriculture, plantations, as well as hydropower generation. This article presents data related to fish biodiversity, its status, utilization, potential and threats in the Kampar watershed summarized from various scientific literatures. Fish biodiversity was recorded as many as 125 species from 36 families. A total of 92.8% of the species are native, while 7.2% are introduced. 36% of fish species were utilized as consumed and 22% as ornamental fish. There are 11.2% that can be classified as economically important fish, two of which are C. lopis and S. formosus. A total of 8% species are threatened. Threats to the Kampar watershed include water resource issues such as the increasingly widespread conversion of land to agriculture, the narrowing of natural forest areas, the expansion of floating net cages, illegal logging, and waste pollution. The data and information presented are expected to be one of the scientific references in developing strategies for managing and utilizing fish biodiversity in the Kampar watershed.
Food crops agricultural land development plan in Semarang Regency
Authors: Yoga Nurpratama Dhafa , Dwi Astuti Khristiana 
Published: January 2025

Abstract
Developments that occur in an area or region are always followed by an increase in the need for space which is a spatial manifestation of population growth which then encourages an increase in space utilization. The development of built-up land tends to convert non-built-up land, one of which is food crop agricultural land. Semarang Regency as an agriculture-based growth area needs a direction for agricultural land development, considering that Semarang Regency is the Kedungsepur development area which is the planned National Activity Center (PKN). Semarang Regency’s food crop agricultural land decreased by 203 hectares from 2018 to 2023, indicating a decline in food security efforts in Semarang Regency. The purpose of this research is to provide recommendations for the direction of food crop agricultural land development that considers the condition of agricultural land and built-up land. This research uses spatial data analysis and processing by combining the priority of food crop agricultural land, the suitability of food crop agricultural land, and the development of built-up land. This research produced a map of food crop agricultural land development directions in Semarang Regency. The direction of food crop agricultural land development in Semarang Regency is located in the eastern region of Semarang Regency, namely Suruh Subdistrict, Pabelan Subdistrict, Kaliwungu Subdistrict, Susukan Subdistrict, Bancak Subdistrict, and Bringin Subdistrict with the existence of more extensive land and relatively flatter natural physical conditions than the western region of Semarang Regency.
Urban heat island analysis in Blora Regency using multispectral images from 2013 to 2022
Authors: Mulyani S. , Sunariya M. I. T. , Anggani N. L. , Raharjanto B. 
Published: January 2025

Abstract
UHI is the increasing surface temperature higher than the surrounding area: high temperatures and low vegetation cause the high UHI. Blora geographically has conditions that often experience severe drought and has very high drought with temperatures >40oC. Based on the above conditions, this study aims to determine the relationship between vegetation index and surface temperature to UHI. After obtaining multitemporal Landsat 9 OLI and Landsat 8 OLI image data from 4 different years spanning three years, NDVI was analysed with LST to produce UHI and a moment product correlation to determine the relationship between NDVI and LST. The results of this study found that the value of the vegetation index decreased in 2019 to the temperature distribution, which also experienced anomalous increases in 2019 compared to the previous year. In correlation, the NDVI value is inversely proportional to LST. The coefficient of determination from 2013 was r2 = 98%, 2016 was r2 = 99%, 2019 was r2 = 80%, and 2022 was r2 = 98%. The quadratic coefficient of determination above shows that the range of years has a perfect relationship (r2).
Utilization of setinel-1 imagery for inundation flood mapping in Northern Part of Java Island
Authors: Lan Bagja Izzatur , Pangi P. , Warasambi Mispaki Syachril , Rahayu Sri 
Published: January 2025

Abstract
The Northern part of Java Island is the center of community activities in Indonesia. Urban centers are located along the Northern Part of Java, such as DKI Jakarta, Cirebon City, Tegal, Semarang, and Surabaya. As a center of urban activity, the Northern Part of Java Island has a relatively high threat of inundation such as flood. The flat topography and most of these cities are in river deltas or upstream of large rivers, causing the threat of flooding to be relatively high and coupled with climate change and increased hydrometeorological disasters. The government has conducted various disaster management and reduction efforts, as well as NGOs and the community. This study utilized remote sensing technology for inundation flood identification and mapping in the Northern Part of Java Island from the backscatter threshold value from Sentinel-1 data indicating water. The threshold value is used as a reference for determining flood inundation from each scene of sentinel-1 imagery. The result showed that the northern part of Java Island has an inundation hazard with an inundated area of 380,23 Km2. The distribution of inundation areas in several provinces such as the most inundated is in West Java with an area of 235,57 Km2, then central Java with an area of 85,95 Km2 holds the second place, then East Java with an area of 34,66 Km2, Banten with 22,28 Km2, and Jakarta with 1,77 Km2. Based on the result, the use of Sentinel-1 imagery for inundation flood mapping is effective due to the ease of obtaining data and simple processing to detect an inundation.
The Sustainability Alternative Energy Utilization for Public Street Lighting (PSL) in Purworejo
Authors: Setyawati Dewanti Diah , Aulia Rahma Firda 
Published: January 2025

Abstract
Alternative energy plays a crucial role in human life, contributing to environmental sustainability. Energy, the primary need for human life, has been facing a crisis for the past few decades. The deterioration of global oil prices is the most compelling reason to increase the utilization of alternative energy. Public street lighting (PSL) is a crucial component of public infrastructure, ensuring safety and comfort. This study aims to analyze the impacts of solar energy utilization for public street lighting in Purworejo regency. Recently, Tegakuning villagers expressed that using solar energy for PSL had positive effects, prompting the local government to develop this program. We selected 412 households as the study’s sample and conducted a questionnaire that focuses on the utilization impact. The independent variables are working time, environment awareness, ownership, lighting characteristics, and community attractiveness. The study has carried out multiple regression analysis to fulfill its aim. We passed the validity test (R measurement more than 0.113), the reliability test (Cronbach’s alpha 0.740), and the data quality assessment (normality and multicollinearity test). The lighting characteristics (0.119) and community attractiveness of the program (0.522*) have a positive effect on the utilization of solar energy in PSL. The F-test indicates that the utilization of alternative energy for PSL in Tegal Kuning villages, Purworejo, simultaneously influences the independent variables.
Analysis of Ecotourism Strategy in Alas Purwo National Park Towards Balanced Tourism
Authors: Wahono Puji , Agustin Pratamasari Dewi , Bara Berutu Meta , Poernomo Djoko , Prasetya Agustian B. , Binti Gulabdin Shaierah , Bin Madli Faerozh 
Published: January 2025

Abstract
This study aims to analyse the development of a balanced-tourism strategy in Alas Purwo National Park in Banyuwangi, Indonesia. Ecotourism is often used as a strategy towards balanced-tourism, although in practice the economic motive (tourism) is more dominant than the conservation motive (ecology) itself. This raises the question of whether ecotourism is the right way to achieve balanced-tourism in national parks. The research method used is qualitative, starting with field observations, in-depth interviews with managers, local government (tourism office), and visitors. Data were obtained through in-depth interviews and focused discussions with relevant stakeholders. Data analysis was conducted systematically from data collection, data reduction, interpretation, and conclusion drawing, borrowing the Miles and Huberman framework. The results concluded that there is a need for institutional strengthening related to the achievement of a balanced-tourism strategy pursued through ecotourism. Maintaining ecological, economic and social balance is an important thing that can be achieved through cooperation with residents around the national park area, as well as increasing awareness of tourists who will enter the national park area.
Study of Drinking Water Supply System (SPAM) regulations after the enactment of Law Number 6 Year 2023 About Job Creation
Authors: Widiyastuti Sri , Rachmawati  , Rohani Siti , Puspitasari Devina , Lolita  
Published: January 2025

Abstract
This study will outline the impacts of policy direction changes on the legal structure management of the Drinking Water Supply System (SPAM) and propose the regulatory concepts for the Drinking Water Supply System (SPAM) that should be implemented following the enforcement of Law Number 6 of 2023 concerning Job Creation.
This research is a doctrinal legal study that focuses on examining the legal aspects of Water Supply and Sanitation for Rural and Urban Areas (SPAM) within the Job Creation Law, using a statutory approach and a conceptual approach. The legal materials required for this study include legal instruments and factual data regarding the regulation of SPAM management in the Job Creation Law, employing a triangulation method for the validity of the research materials.
Research findings indicate that the policy of resentralisation of licensing in water resource management will lead to disharmony and inconsistency with the management of Drinking Water Supply Systems (SPAM) based on the concept of regional autonomy, which embodies the principle of State Control in the welfare state doctrine. When the direction of water resource management policy is not aligned with the spirit of decentralisation, it hinders the development of SPAM within the legal framework and management culture from a business entity perspective. Post the enactment of Law Number 6 of 2023, the management of water resources should be followed up with efforts to harmonise it with regulations concerning regional autonomy and technical rules related to the management of drinking water supply systems (SPAM). Considering that the concept of decentralisation embodies the fundamental principle of state control within the framework of a welfare state, the regulation of water resource management and SPAM following the implementation of the Job Creation Law must be designed in accordance with the decentralisation concept to meet the basic water needs relevant to regional characteristics.
Tree Community at the GOS of 45 Banjarsari Monument and the GOS of TMP, Surakarta, Central Java
Authors: Indrawan Muhamad , Dwi Setyawan Ahmad , Abu Nazar Irfan , Sunarto  , Wahyuni Titi , Himawan Widhi , Maulida Ibriza Naila , Hidayat Wahyu , Chairunisa Safira 
Published: January 2025

Abstract
Green Open Space (GOS) has many roles in ecosystem services in urban environments. Banjarsari Monument and TMP (Taman Makam Pahlawan) are part of green open spaces in Surakarta, which have different environmental conditions and functions. The difference in the composition of types, individuals, and infrastructure is an interesting thing to know about the ecosystem services of each of these spaces. Data was collected at GOS Monjari and GOS TMP in July 2024. Vegetation analysis is carried out to determine the number, type, circumference, and height of trees and poles. Furthermore, the calculation of Relative Density (RD), Relative Frequency (RF), and Relative Dominance (RD) was carried out to find out the Important Value Index, in addition to that the Evenness and Diversity Index was also calculated. The research shows that there are 311 individuals consisting of 27 types of trees and poles in the Monjari and 738 individuals consisting of 41 types of trees and poles in the TMP.
Exploring the public space typology of tourist villages from the perspective of digital social media to build sustainable tourism
Authors: Ali Ikhsan Fauzan , Zaky Ramadhan Ikhwan 
Published: January 2025

Abstract
The image of the tourist village space plays an essential role in attracting tourists to visit. Currently, various digital social media platforms can shape the perception of the spatial image of a tourist village to invite tourists to visit the village. This study aims to analyze the public space typology of a tourist village from the perspective of digital social media. The research methodology used is a qualitative approach. Data was collected by web scraping on Instagram social media and continued with content analysis to identify the image of the tourist village public space. The results of this study indicate that the category of public space with external type and internal “quasi” public space is the type of public space that often appears in the Instagram content of tourist villages. These findings are expected to provide a better understanding of how the image of tourist village spaces from the perspective of digital social media so that it can be an input for planners and designers of sustainable tourist village spaces.