bluuebunny/crossref_metadata_2025 huggingface dataset:
Spectral and temporal atomic coherence interaction in Eu3+ : NaYF4 and Eu3+ : BiPO4
Authors: Feng Zhou , Imran Muhammad , Nadeem Faisal , Fan Huanrong , Yan Jin , Ahmed Irfan , Lau Condon , Zhang Yanpeng
Published: December 2023

Atomic coherence interactions have become a hot research, which seriously affect the properties of quantum entangled states. We study interactions based on fluorescence and spontaneous four-wave mixing from Eu3+ doped into NaYF4 and BiPO4.
Magnetic studies of ultrafine CoFe2O4 nanoparticles with different molecular surface coatings
Authors: Mosiniewicz-Szablewska Ewa , Figueiredo Leandro Carlos , da Silva Atailson Oliveira , Sousa Marcelo Henrique , de Morais Paulo César
Published: December 2023

Pioneering evidence that undercooling CoFe2O4 nanoparticles evolve from an interacting superparamagnet, through the cluster-glass state, to the spin-glass state.
Morphologies and magnetic properties of α-Fe2O3 nanoparticles calcined at different temperatures
Authors: He Xue-Min , Chen Duan-Qing , Su Kun-Yu , Yu Zhen-Fei , Zhang Yi , Zhong Wei
Published: December 2023

SEM images of α-Fe2O3 nanoparticles calcined at different temperatures.
High tunneling electroresistance in ferroelectric tunnel junctions based on two-dimensional α-In2Se3/MoTe2 van der Waals heterostructures
Authors: Lei Leitao , Zhou Yan-Hong , Zheng Xiaohong , Wan Wenqiang , Wang Weiyang
Published: December 2023

Ferroelectric polarization-controlled band alignment can be realized in van der Waals heterostructures (vdWHs), which can be used to create new types of ferroelectric tunnel junctions (FTJs).
Thermal transport properties of graphene aerogel as an advanced carrier for enhanced energy storage
Authors: Song Jieren , Xu Xianghua , Liang Xingang
Published: December 2023

This study explores the thermal transport in sulfur/octadecane-graphene aerogel composites for energy storage, using molecular dynamics and heat transport models.
Cooperative activation of carbon–hydrogen bonds by heterobimetallic systems
Authors: Lachguar Abdelhak , Pichugov Andrey V. , Neumann Till , Dubrawski Zachary , Camp Clément
Published: December 2023

The activation of C–H bonds by heterobimetallic compounds is a rich area of research that has recently received increased attention. This perspective highlights recent advances and aims to guide the reader in this rapidly evolving field.
Metal–ligand synergy driven functionalisation of alkylene linked bis(aldimine) on a diruthenium(ii) platform. Cyclisation versus oxygenation
Authors: Biswas Mitrali , Dey Sanchaita , Dhara Suman , Panda Sanjib , Lahiri Goutam Kumar
Published: December 2023

Redox-induced cyclisation or oxygenation of bis(aldimine) derived ligands on a selective {Ru(acac)2}2 platform was conceived based on the alkylene conformation.
Electrification of gasification-based biomass-to-X processes – a critical review and in-depth assessment
Authors: Dossow Marcel , Klüh Daniel , Umeki Kentaro , Gaderer Matthias , Spliethoff Hartmut , Fendt Sebastian
Published: December 2023

How can direct or indirect electrification of BtX (eBtX/PBtX) processes contribute to more efficient and greener biofuel production?
Highly efficient sustainable strategies toward carbon-neutral energy production
Authors: Huang Jingbin , Hu Bin , Meng Jiashen , Meng Tao , Liu Wenxin , Guan Yiting , Jin Lin , Zhang Xingcai
Published: December 2023

Strategies to improve the electrocatalytic OER selectivity and stability in seawater electrolysis.
Particulate matter exposure may increase the risk of irritable bowel syndrome: a large-scale prospective study based on the UK Biobank
Authors: Ran Yan , Lei Jian , Li Laifu , Wang Lianli , Sun Yating , Mei Lin , Ye Fangchen , Dai Fei
Published: December 2023

Long-term exposure to PM10 and PM2.5 increases the risk of IBS, especially PM2.5.
Facile and green synthesis of a hydrophilic imprinted resin in a deep eutectic solvent–water medium for the specific molecular recognition of tumor biomarkers in complex biological matrices
Authors: Wang Mingwei , Zhou Liang , Qiao Fengxia , Yan Hongyuan
Published: December 2023

A novel and environmentally friendly strategy was developed to synthesize a hydrophilic molecularly imprinted resin in a deep eutectic solvent–water medium, achieving exceptional molecular recognition of tumor biomarkers in complex biological sample.
Asymmetric structural tuning of industrial MnO2 arrays on a hierarchical lead-based anode for manganese metallurgy
Authors: Tang Binyuan , Yang Fan , Chen Chaoyi , Shi Changping , Wang Bo , Li Junqi , Zhang Dongdong
Published: December 2023

We provide a hierarchical structural tuning method for producing asymmetrical MnO2 with stable catalysis by preventing Pb toxicity as a long-lasting oxygen evolution selective layer on a commercial lead-based anode for manganese electrowinning.
Advancing very high temperature thermoelectric performance of Yb4Sb3 through dual-substitutions: a combined experimental and theoretical study
Authors: Bouteiller Hugo , Pelletier Vincent , Le Tonquesse Sylvain , Fontaine Bruno , Mori Takao , Halet Jean-François , Gautier Régis , Berthebaud David , Gascoin Franck
Published: December 2023

Yb4Sb3 and substituted derivatives were investigated through combined experimental and theoretical investigation for very high temperature thermoelectric applications.
Recent progress of heterogeneous catalysts for transfer hydrogenation under the background of carbon neutrality
Authors: Chen Guangyu , Ma Jun , Gong Wanbing , Li Jiayi , Li Zheyue , Long Ran , Xiong Yujie
Published: December 2023

This review summarizes the recent advances of heterogeneous catalysts for catalytic transfer hydrogenation using CO2-derived formic acid and methanol as the hydrogen sources.
Deformation mechanisms in high entropy alloys: a minireview of short-range order effects
Authors: Rasooli Novin , Chen Wei , Daly Matthew
Published: December 2023

The effects of short-range order (SRO) on defect behaviors in high entropy alloys with examples of vacancy migration and dislocation slip. SRO introduces excess energies that are not present in random alloys which impacts the defect metallurgy.
Protein-guided biomimetic nanomaterials: a versatile theranostic nanoplatform for biomedical applications
Authors: Zhang Da-Gui , Pan Yu-Jing , Chen Biao-Qi , Lu Xiao-Chang , Xu Qin-Xi , Wang Pei , Kankala Ranjith Kumar , Jiang Ni-Na , Wang Shi-Bin , Chen Ai-Zheng
Published: December 2023

This article reviews the general principles and strategies for constructing protein-mineralized nanomaterials (PMNMs). Subsequently, the progress of PMNMs in bioimaging, anti-tumor, anti-bacterial, and anti-inflammatory therapies is summarized.
Graphene quantum dot-mediated anchoring of highly dispersed bismuth nanoparticles on porous graphene for enhanced electrocatalytic CO2reduction to formate
Authors: Cheng Yi , Yang Ruizhe , Xia Lu , Zhao Xiaoli , Tan Yuwei , Sun Ming , Li Suming , Li Fei , Huang Ming
Published: December 2023

A strategy employing GQDs for deposition was devised to synthesize highly-dispersed bismuth nanoparticles on porous graphene, yielding excellent CO2RR activity.
Influence of hydrophilic block length on the aggregation properties of polyglycidol–polystyrene–polyglycidol copolymers
Authors: Otulakowski Łukasz , Kasprow Maciej , Gadzinowski Mariusz , Slomkowski Stanislaw , Makowski Tomasz , Basinska Teresa , Forys Aleksander , Godzierz Marcin , Trzebicka Barbara
Published: December 2023

Aggregation of precisely synthesised polyglycidol–polystyrene–polyglycidol copolymers is presented. The relationship of CMC vs. composition of copolymers has been shown. π-stacking between benzene rings in micelles cores has been observed.
Synthesis and structural characterization of l-prolinol derived chiral eutectic mixtures as sustainable solvents in asymmetric organocatalysis
Authors: Ñíguez Jose A. , Burlingham Sarah J. , Chinchilla Rafael , Pérez Juana M. , Fernández Ignacio , Alonso Diego A.
Published: December 2023

New l-prolinol derived chiral liquids in asymmetric organocatalysis.
Critical Thinking: A Program Review of Doctor of Audiology Students
Authors: Hurley Annette , Guidry Megan , Majoue Megan , Hebert George
Published: December 2023

Purpose:

Critical thinking is a crucial component of health care, and its importance has been recognized in training medical professionals. This study reports critical thinking skills for entering doctor of audiology (AuD) students and the trajectory of the change in critical thinking skills measured 2 times over a period of 3 years.

Method:

This longitudinal, descriptive, and exploratory design was implemented for programmatic review. Critical thinking skills were measured using the Health Sciences Reasoning Test (HSRT; Insight Assessment) upon entering the program and compared to measurements during the final month of academic coursework. Descriptive statistics, exploratory analyses of the HSRT scores among cohorts, the relationship of the HSRT to the graduate record examinations (GREs), and changes in the HSRT over time using a repeated measures multivariate analysis of variance were conducted.

Results:

There were no significant differences in critical thinking skills between any of the cohort years. There was a significant correlation between the GRE verbal scores and OVERALL HSRT. Improvements in critical thinking skills were found between the time the students entered the graduate program and their final academic semester. Greater gains were reported for students who initially scored below the 50th percentile on the OVERALL HSRT.

Conclusions:

This program review showed improvement in the critical thinking skills of AuD students during their academic training program. Information regarding critical thinking skills may be useful for programs to monitor students' clinical thinking skills and possibly include clinical and didactical activities to promote critical thinking skills.
A Systematic Review of Pharyngeal High-Resolution Manometry Normative Data
Authors: Walters Rameen K. , Gudipudi Rachana , Gordis Tamar , Davidson Kate , Nguyen Shaun A. , O'Rourke Ashli K.
Published: December 2023

Purpose:

The utilization of high-resolution pharyngeal manometry (HRPM) in the evaluation of pharyngeal dysphagia has been increasing; however, standardization of its use has lagged behind. Without standardization using normative values, it is difficult for clinicians to adopt this emerging technology into meaningful use. Our goal is to map and compare the published normative values for common HRPM metrics in order to help establish consensus reference values.

Method:

A systematic review was conducted on prospective and retrospective studies that included HRPM metrics, defined by an international working group consensus, in healthy adult populations. Data on the following variables were extracted when available: contractile integrals of the pharynx (PhCI), velopharynx, mesopharynx, and hypopharynx, as well as the upper esophageal sphincter (UES) integrated relaxation pressure (IRP), relaxation time (RT), maximum admittance, and hypopharyngeal intrabolus pressure.

Results:

Thirty studies were included. Significant variation existed in the technique and equipment used to perform procedures between the different studies. Lower PhCIs and UES IRPs were seen in younger compared to older individuals. Higher UES RTs were found in individuals in the upright position compared to the supine position and in those using larger boluses sizes or smaller catheters.

Conclusions:

Due to the wide variety of protocols, catheter configurations, manufacturers, and software used in the existing literature, it is difficult to formulate consensus on HPRM normative values using pooled data. Prospective studies adhering to standardized HRPM protocols for specific catheter configurations and manufacturers with larger cohorts of normal individuals are necessary to establish proper reference values for HRPM metrics.

Supplemental Material:

https://doi.org/10.23641/asha.24843753
Image‐based crop row detection utilizing the Hough transform and DBSCAN clustering analysis
Authors: Zhao Richeng , Yuan Xianju , Yang Zhanpeng , Zhang Lei
Published: December 2023

More accurate methods for crop row detection benefit intelligent operation of agricultural machinery, especially avoiding mishandling or crushing crops. For achieving such a target, a traditional method combining the ExGR exponents, Otsu algorithm, Canny method, Hough transform and DBSCAN clustering analysis is proposed so that centerlines of crop rows can be detected effectively without manual intervention. Specifically, ExGR exponents are first adopted to gray green plants. The threshold of binarization will be further obtained by the Otsu algorithm. Further adopting the edge detection algorithm (Canny), edges of crops can be determined. Finally, combining the Hough transform and DBSCAN clustering analysis, the crop row detection is effectively available. Utilizing these methods, numerical simulation and their comparisons with existing methods are also achieved. For example, the Canny algorithm is relatively accurate than the Suzuki algorithm as well as their combinations with a geometric center extraction method if the density of weed is high. Compared with the K‐means clustering method, the DBSCAN algorithm is more suitable to characterize crop rows optimally in more complex conditions. It is validated from experiments that the combination of Canny algorithm, Hough transform and DBSCAN clustering is better than other mentioned traditional methods.
ICAROGW: A python package for inference of astrophysical population properties of noisy, heterogeneous, and incomplete observations
Authors: Mastrogiovanni Simone , Pierra Grégoire , Perriès Stéphane , Laghi Danny , Santoro Giada Caneva , Ghosh Archisman , Gray Rachel , Karathanasis Christos , Leyde Konstantin
Published: December 2023

We presentICAROGW2.0, a purepythoncode developed to infer the astrophysical and cosmological population properties of noisy, heterogeneous, and incomplete observations. The code has mainly been developed for compact binary coalescence (CBC) population inference with gravitational wave (GW) observations. It contains several models for the masses, spins, and redshift of CBC distributions and it is able to infer population distributions, as well as the cosmological parameters and possible general relativity deviations at cosmological scales. Here, we present the theoretical and computational foundations ofICAROGW2.0 and describe how the code can be employed for population and cosmological inference using (i) only GWs, (ii) GWs and galaxy surveys, and (iii) GWs with electromagnetic counterparts. We discuss the code performance on GPUs, finding a gain in computation time of about two orders of magnitude when more than 100 GW events are involved in the analysis. We have validated the code by re-analyzing GW population and cosmological studies, finding very good agreement with previous results.
eRASSU J060839.5–704014: A double degenerate ultra-compact binary in the direction of the LMC
Authors: Maitra C. , Haberl F. , Vasilopoulos G. , Rau A. , Schwope A. , Friedrich S. , Buckley D. A. H. , Valdes F. , Lang D. , Macfarlane S. A.
Published: December 2023

Context. During four all-sky surveys (eRASS1–4), eROSITA, the soft X-ray instrument aboard Spektrum-Roentgen-Gamma (SRG) detected a new supersoft X-ray source, eRASSU J060839.5−704014, in the direction of the Large Magellanic Cloud (LMC).

Aims. We arranged follow-up observations in the X-ray and optical wavelengths and further searched in archival observations to reveal the nature of the object.

Methods. Using X-ray observations with XMM-Newton we investigated the temporal and spectral behaviour of the source.

Results. We discover pulsations at 374 s with a pulse profile consistent with 100% modulation. We identify two other periodicities in the eROSITA data, which we establish as aliases due to the sampling of the eROSITA light curve. We identify a multi-wavelength counterpart to the X-ray source in UVW1 and g, r, i, and z images obtained by the optical/UV monitor on XMM-Newton and the Dark Energy Camera at the Cerro Tololo Inter-American Observatory. The timing and spectral characteristics of the source are consistent with a double degenerate ultra-compact binary system in the foreground of the LMC. eRASSU J060839.5−704014 belongs to a rare class of AM CVns, which are important to study in the context of progenitors of SN Ia and for persistent gravitational wave detection.

Conclusions. We identify eRASSU J060839.5−704014 as a new double degenerate ultra-compact binary located in the foreground of the LMC.
Integrating gender mainstreaming in disaster risk reduction through providing geospatial information to create community resilience in Muntuk Village, Bantul Regency
Authors: Alfarizi M. Zaky , Sonia Nada Salsabila , Isti’adatul Fitriyah , Alia Fajarwati
Published: December 2023

Muntuk Village, Bantul Regency has a high multi-risk disaster potential, in the form of earthquakes and landslides. This is due to the location of Muntuk Village which is in the Bukit Batur Agung formation and is directly connected to the Opak Fault. The implications of these threats result in high disaster vulnerability. The focus of this research is to examine aspects of social vulnerability with the main subject being women, especially since the number of victims of the 2006 Bantul earthquake was dominated by women. This research seeks to integrate the development of Prima Village to increase the resilience of women's communities. The method used is a concurrent mixed method using questionnaires, interviews, and observations, as well as mapping data processing. The results of the analysis produced several outputs, including Sex Ratio Map, Economic Resilience Index Map, Prima Village Feasibility Standard Map, Landslide Prone Area Map, Logistics Warehouse Coverage Effectiveness Map, Logistics Warehouse Development Plan Map, and policy recommendations. It is hoped that this output can be used as input in designing regional disaster planning policies, both pre-disaster, during a disaster, and post-disaster, especially for women to improve community empowerment programs to achieve the goals of Prima Village.
VEVCC program for concatenation of volcanic events based on cross-correlation analysis
Authors: Dairoh Dairoh , Fauzi Masykuri Anas , Setyo Yuliatmoko Rahmat , Rakhman Afif , Saroji Sudarmaji , Ashari Ahmad , Suryanto Wiwit
Published: December 2023

Volcanic eruptions pose a significant risk to communities located near active volcanoes. Disaster mitigation and risk reduction efforts rely on detecting and monitoring volcanic activity as early as possible. This article introduces VEVCC, a MATLAB-based application designed to precisely identify and extract volcanic seismic events from continuous data streams. VEVCC's primary objective is to facilitate the creation of an Excel file containing the arrival times of detected events, which can then be used for various purposes, such as early warning disaster mitigation and automated event identification via machine learning techniques. VEVCC utilizes cross-correlation algorithms to identify volcanic seismic events. It separates these events from background noise and other sources of seismicity, allowing for the construction of a clean and informative dataset. The extracted data is a valuable resource for estimating the frequency of volcanic events and evaluating patterns of volcanic activity. VEVCC's time-stamped event data is indispensable for improving early warning systems, real-time surveillance, and automated event identification. We tested the program on the Merapi volcano datasets during a 1998 campaign for a broadband experiment with the capability to extract the events automatically. Further machine-learning models and algorithms enhance the automatic recognition of volcanic events.
Detection and mapping abandoned areas of artisanal and small-scale gold mining (ASGM) using multi-sensor data on Google Earth Engine: A case study of Kuantan Singingi, Riau
Authors: Amri Ikhwan , Saringatin Siti , Ruslanjari Dina
Published: December 2023

Artisanal and small-scale gold mining (ASGM) activities in Kuantan Singingi, Riau have been operating over a decade without proper permits and using unsafe procedures for the environment. Mercury releases and degraded land have been the leading factors in the decreased environmental functions. ASGM activities are nomadic and secluded, posing a considerable challenge in detecting their location and extent. The aims of this study are to provide a method for detecting and mapping ASGM footprints utilizing multi-sensor data on cloud computing platforms. The detection method is performed using a supervised random forest algorithm. The result successfully mapped an ASGM footprints, estimating an area of 10,044.38 ha with 89.23% accuracy through Sentinel-1 data and an area of 12,308.57 ha with 87.25% accuracy through Sentinel-2 data. The spatial distribution of ASGM footprints is scattered over the streams and tributaries across all regions. These maps are pivotal in establishing regulatory measures for environmental restoration and preventing further expansion of degraded land.
Structural map of Sulawesi derives from gravity data and its implications for geothermal systems
Authors: Umar Emi Prasetyawati , Harijoko Agung , Setianto Agung , Suryanto Wiwit
Published: December 2023

Gravity satellites are one of the alternatives to conducting preliminary surveys because the cost of exploring a large area using conventional gravity methods is very expensive and takes a lot of time. Therefore, this study on Sulawesi Island uses a gravity satellite to identify fault contact boundaries. The methodology in this study consists of several steps, starting with a literature study, data collection through ICGEM, and then processing and analysis by compiling the gravity anomaly with the Sulawesi regional geological structure map, further interpreted using the classification of rock density variations from a geological perspective. The regional gravity anomaly values for Sulawesi Island and its surroundings range from -270.9 mgal to 320.8 mgal, averaging 78.99 mgal. High anomalies are estimated to be between 180 mgal and 360 mgal, dominated by land with a lithology predominance of igneous rocks, while low anomaly areas are identified in the Batui thrust subduction zone. This study concludes that the convergence of high and low gravity anomalies characterizes the fault contact boundary in the study area. This has implications for the geothermal system on Sulawesi Island, which has a significant impact as a medium for the release of hot fluids from the subsurface.
Employment analysis of North Kalimantan Province 2018-2020
Authors: Kusumawardhani Ekky Elfira , Girsang Michelle Ruth Boru , Nurjanah Siti , Fiore Katyusha , Pitoyo Jendra Satria , Putri Ratih Fitria
Published: December 2023

Employment is one of the important factors in national development. This study aims to analyze the employment conditions of North Kalimantan Province, from the workforce to the unemployment rate. The average LFPR (Labour Force Participation Rate) in North Kalimantan Province in 2020 is 66.51. Especially in the district which has many coal and mineral industries, the initial LFPR was 75.04 in Malinau Regency. Kalimantan Province's EPR based on age group shows that in 2018, 2019, and 2020 there are not too many differences in EPR (Employment to Population Ratio) levels. The lowest EPR is always in the 15-19 age group with an EPR of 22.94%; 17.95%; and 24.73%. Tarakan City has a higher TPT (Open Unemployment Rate) value than other districts, even compared to North Kalimantan Province with 5.89%, 5.3%, 5.86%, and 4.14%. North Kalimantan experienced a decrease in the underemployment rate of 0.37% in 2018—2019. Then in 2020, all districts/cities in North Kalimantan experienced an increase in the underemployment rate.
Material and child health analysis and its intercourse to the availability of health facilities in Papua province
Authors: Siahaan C.A. , Sumunar A.A.K. , Pratama D. , Mustikaningrum M. , Srihadini T.N. , Puti R.F.
Published: December 2023

Community access to health in Papua is still inadequate compared to other provinces in Indonesia. This condition has a significant influence on the level of maternal and child health in Papua. This study aims to determine the health conditions of mothers and children and their relationship with the availability of health facilities in Papua. Secondary data from the Ministry of Health and the Central Statistics Agency were adopted for this study. Infant mortality rate (IMR), the maternal mortality rate (MMR), the percentage of mothers who gave birth to live births in health facilities and medical assistance, and the number of available health facilities are the variables used in this study and analysed using descriptive statistical quantitative methods with related references. IMR in Papua still fluctuates due to several causes such as low birth weight, asphyxia, and diarrhea. On the other hand, maternity services show good progress. However, the MMR in Papua Province is still high due to high cases of bleeding from pregnant women and the uneven distribution of health facilities. This study shows a directly proportional relationship between the number of facilities and the health conditions of mothers and children.
Analysis of Groundwater Vulnerability to contamination in Wonosari Basin and Gunungsewu Karst Transition Zone, Yogyakarta, Indonesia
Authors: Astabella Relinda Dewi , Widyastuti Margaretha , Adji Tjahyo Nugroho
Published: December 2023

The Wonosari Basin and the Gunungsewu Karst Transition Zone have enormous groundwater resources but are hydrogeologically vulnerable to contamination. To achieve sustainable groundwater protection and management, it is imperative to study groundwater vulnerability. Th e research aimed to determine the spatial distribution of groundwater vulnerability in both areas. The COP method, which integrates the concentration of flow (C-Factor), overlaying layer (O-Factor), and precipitation (P-Factor), was used to assess the groundwater vulnerability. Based on the analysis, the groundwater was lowly to very highly vulnerable to contamination. The moderate vulnerability was dominant in both areas. The v*ery low vulnerability was concentrated in the basin, while the low vulnerability was distributed both in the basin (40.43%) and the transition zone (32.79%). High (12.53%) and very high vulnerabilities (5.48%) were found in the Gunungsewu Karst Transition Zone, especially in swallow hole recharge area (< 1 km2). The karst transition zone was more highly vulnerable to contamination than Wonosari Basin, a non -karst area. Various known contaminants are by-products of human activities, including nitrates from chemical fertilizers and domestic wastes. To prevent contamination, local governments should actively address the potential sources of contaminants while considering current groundwater vulnerabilities, particularly in the high and very high vulnerability zones.
Hydrogeochemistry of Epikarst Spring During Rainy Seasons in the Ponjong Hydrogeological Subsystem, Gunungsewu Karst Area, Indonesia
Authors: Kurniatillah Aulia Nisa , Cahyadi Ahmad , Adji Tjahyo Nugroho , Riyanto Indra Agus , Satrio Fahry Adhi , Singgih Akhmad , Acintya Rasyiida , Azizah Wafiq Nur
Published: December 2023

Gedaren Spring is an important source of clean water and irrigation water that is located in the transition zone between the Gunungsewu Karst and the Wonosari Basin. Limestone dissolution is the dominant process influencing this epikarst spring’s dynamics, but there has been no temporal hydrogeological testing on its ion content. This hydrogeochemical study was intended to determine the characteristics and quality of Gedaren Spring water during the rainy season. The methods used in the chemical analysis were Schoeller, Piper, and chemographic diagrams, and the results were correlated with spring discharge measurements and rainfall. The chemical analysis showed a positive correlation between discharge and rain, the temporal presence of dominant ions, and temporal correlation patterns between variables. Ca2+ and HCO3- were the dominant cation and anion. The spring water was classified as calciumenriched, calcium, bicarbonate, Ca2+ + Mg2+, and HCO3--type groundwater and as unpolluted groundwater, suggesting good water quality. Chemographic patterns indicated that Mg2+, Cl-, and SO42- ions positively correlated with discharge and rainfall, while Ca2+, HCO3-, Na+, K+, pH, EC, temperature, and TDS negatively correlated with the two variables. Overall, Gedaren Spring has good chemical characteristics and quality during the rainy season has a dominant process of calcium enrichment and is of the type Ca2++Mg2+ and HCO3-.
Water Quality Status of Omang Pond in Gunungsewu Karst Area, Gunungkidul, Indonesia
Authors: Kusumawati S. , Widyastuti M.
Published: December 2023

The Gunungsewu Karst Area has a unique hydrological system with limited surface water resources, especially in dry seasons. Karst ponds, thereby, play an essential role in meeting the local water needs. Omang is a karst pond used intensively for bathing and washing, which is thought to decrease water quality. The research objectives were (1) to determine the characteristics of the pond, (2) to analyze the pond water quality, and (3) to assess the water quality status. Water quality analysis was conducted at several points selected by purposive random sampling. Temperature, pH, DO, and TDS were measured directly in the field, while nitrate, phosphate, turbidity, BOD, and fecal coliform were tested in the laboratory. Also, the National Sanitation Foundation-Water Quality Index (NSF-WQI) was employed to assess the water quality status. Results showed that the pond has a shallow depth, making the bottom sediment prone to mixing, and a volume of 4,706.09 m3. Per Governor Regulation Number 20 of 2008, DO, BOD, nitrate, phosphate, and pH exceeded their respective upper limits for class II purposes. In contrast, temperature, turbidity, TDS, and fecal coliform met the recommended standards. Based on the NSF-WQI values, the status of the pond water quality was moderately polluted.
Bankability challenges for the construction of micro hydro power plants utilizing state-owned dams (case study: Pandanduri dam, West Nusa Tenggara-Indonesia)
Authors: Pangarso Suksmo Satriyo , Alexando Bryan , Aminata Jaka
Published: December 2023

Power supply business plan (RUPTL) of PT. PLN (Persero) year 2021-2030 states that there is an electric potential of 337.1 MW that can be generated from 60 dams owned by the Government of the Republic of Indonesia through the Ministry of Public Works and Public Housing. The tender process for several locations has already been implemented. One of them is the Pandanduri micro hydro power plant which utilizes the outlet of the Pandanduri Dam, West Nusa Tenggara. The purpose of this study is to analyze the challenges of the Pandanduri microhydro project in obtaining funding from financial institutions. Assessment of aspects of bankability (character, capacity, capital, collateral, condition of economy) with regard the construction of Pandanduri microhydro shows that the role of sponsors is very significant in providing equity portion, providing guarantees and to mitigate the potential risk of cost overrun, delay in commercial operation date and cash deficiency.
Geopedology in complex landform setting: A case study in eastern Parangtritis Village, Indonesia
Authors: Amri Ikhwan , Insani Anugrah Aditya , Hibatullah Muhammad Fikri , Dairina Isnaini , Wijaya Alfi Wira , Adinugraha Ariel Seto
Published: December 2023

The structural mountain range of Baturagung continue to undergo soil development, influenced by various factors, including landform, geomorphological processes, and land use management. This research is grounded in the potential of soil resources based on landform, demanding precise land management and conservation. The study involved transecting and soil sampling across different landform features in the eastern part of Parangtritis Village. The delineation of these features was aided by the modification of the topographic position index-based landform classification. Research data revealed that the landform types encompass shoulders, backslopes, footslopes, toeslopes, depressions, and floodplains. Each of these landform features exhibits distinct soil characteristics concerning depth, color, texture, and mottling, as well as organic matter, manganese, and carbonate content. These characteristics also represent soil problems that require special management, including shallow soils, steep soils, Vertisols, and anthropogenic soils experiencing compaction. Proper soil management is essential to mitigate land degradation. Therefore, investigating the variations in soil characteristics based on geomorphology is crucial for comprehending their formation and development processes and for factoring them into land management decisions.
Settlement quality assessment based on physical and non-physical aspects: A study case in Prenggan, Kotagede District
Authors: Aulia Nayla Syifa , Putri Luthfiana , Rohmah Nabilah Luthfatur , Arfian Muhammad Dwi , Putri Ratih Fitria
Published: December 2023

The settlements’ quality is closely tied to the degree of ability of a settlement in accessing the inhabitant’s needs. If this matter is not considered, it might cause other problems, such as the formation of slum areas. This research contains data based on various aspects, which include economics, accessibility, physical buildings characteristic, sanitation, and living environment. The data were obtained from interviews with 23 respondents in the study area, processed using the Sturgess formula to classify each aspect, and subsequently analyzed using scoring analysis. This research aims to determine the settlement’s quality in Prenggan with the results of various aspects including physical and non-physical from the cluster random sampling interviews. The results from this research regarding settlement quality assessment in part of the Prenggan based on economic aspect is dominated by moderates (60,9%), most of the scores on accessibility aspect are low (52,2%), the sanitation aspect is dominated by moderate (52,2%), the building characteristics aspect where most of the samples lived were classified as high (56,5%), and mostly the living environment aspect is high (52,2%). This data can be used as a benchmark for the government in designing some development programs that can reduce the area of slums.
The Growth of Urban Heat Island Effect Monitored in a Rapidly Developing City of Lombok Island
Authors: Restuaji Yadug , Nurkhalifah Azizah , Estiono Meru Sigit , Tampubolon Anastasya Clara Srinila , Sekaranom Andung Bayu
Published: December 2023

The study aims to monitor urban development around Mataram City and the correlation between Urban Heat Island. Also, analyze the vegetation and built-up changes surrounding Mataram City with Land Surface Temperature (LST) growth. The boundary of the study location is a 25-kilometer radius from the Mataram City centroid. The data used in this research is Landsat 8 Surface Reflectance for the period June-September in 2013, 2019 and 2023 obtained from Google Earth Engine. The Random Forest method is used to obtain land use classification with urban, rice fields, dry land, water bodies, and vegetation. NDBI values are processed from Shortwave infrared (SWIR) and Near-infrared (NIR), NDVI from Near-infrared (NIR) and Red, and LST from thermal bands. The data processing results indicate that Mataram City and its neighboring areas are showing growth, marked by rising NDBI and LST values. This growth is characterized by an expansion of built-up areas to the north, east, and south especially rings 4 and 5, simultaneously by higher NDBI values. Additionally, there is a decrease in vegetation cover, particularly in lowland areas within these rings, leading to a decline in NDVI values. Areas with increased NDBI values also show an increase in LST.
Urban mining from a circularity perspective
Authors: Ballesteros Florencio , de Sales Louernie , Yoshida Aya , Terazono Atsushi , Tembresa Justin
Published: December 2023

The transition from considering e-waste as a liability to recognizing it as a valuable resource is pivotal for environmental sustainability. Electronic waste is growing at an alarming rate, and the extraction and recovery of precious metals offer an economically and ecologically sound solution. Furthermore, with the global shift towards electrification, renewable energy, and advanced technologies, the demand for rare earth elements continues to rise. Extracting these elements from e-waste, even through rudimentary methods, can address their scarcity and reduce our reliance on environmentally destructive mining practices. However, the unethical export of e-waste from developed to developing countries remains a critical issue. Furthermore, there is there is the health risks associated with improper dismantling practices in the informal sector. To eradicate this risk a scheme providing proper environmental practices by way of formalizing the informal sector. A cost to benefit analysis was made to study several set ups for a material recovery facility. The project outcomes include a greater awareness of the health risks of hazardous materials in ewaste and an appreciation of the proper waste handling practices. This study's findings underscore the urgency of enforcing international agreements like the Basel Convention, improving working conditions in the informal sector, and implementing safer recycling practices. Moreover, the study serves as a valuable blueprint for replication in other barangays or villages in the country with a vision to offering lessons on how to transform this global problem into an opportunity for sustainable resource management while protecting human health and the environment.
Application of rotating packed bed technology for biogas upgrading
Authors: Joel Atuman Samaila , Isa Yusuf Makarfi
Published: December 2023

Biogas is a renewable energy source consisting mainly of methane, carbon dioxide, and other impurities. A purification process is required to remove the impurities (biogas upgrading and purification) to meet the requirements as an energy source for vehicles. Removal of CO2 from the biogas stream, which accounts for about 40% of the impurities, is necessary to produce biogas (mainly methane) for use in vehicles. Chemical absorption of CO2 using a rotating packed bed was considered due to its high CO2 absorption efficiency and small column size. Aspen Plus and Visual Fortran software were used to develop the model, and monoethanolamine (MEA) was used as the absorbent. The developed model was validated with experimental data, where the relative error is less than 10%. The process analysis performed shows: (a) biogas purity increases with rotation speed. (b) An increase in lean solvent concentration leads to an increase in CO2 capture efficiency and biomethane purity. (c) An increase in biogas throughput leads to an increase in biogas purity. The study may be useful for the design and operation of intensified CO2 capture from biogas streams for vehicle applications.
New challenges for Uzbekistan’s energy sector and the role of the gas industry
Authors: Kuklina Anna , Galkina Anna
Published: December 2023

This article raises an important problem for the Republic of Uzbekistan of the shortage of energy resources caused by the depletion of proven reserves of natural gas, which is the basis of the country's energy balance. Within the scope of this study, utilizing the methodology developed by the Energy Research Institute of the Russian Academy of Sciences for forecasting fuel and energy balances, a projection of primary energy demand in the Republic of Uzbekistan until 2030 has been calculated. This projection is detailed by fuel types. Based on the obtained results, the requirement for natural gas until 2030 has been determined. Furthermore, using data on proven natural gas reserves, a projection of production capacities has been calculated. As a result, a set of measures has been proposed aimed at reducing risks associated with the energy security of the Republic of Uzbekistan.
The role of the gas industry in the energy of the countries of Central Asia and Caspian region
Authors: Darya Yakovleva , Dunaeva Natalia
Published: December 2023

The article provides an analysis of the energy sector of the countries in the region, identifying the current and prospective role of the gas industry within it.
Application of Web Services for Visualization of the Results of Environmental Studies
Authors: Ivanov Roman , Maksakov Nikita , Izhbuldin Alexandr
Published: December 2023

The paper provides a description of web services for displaying environmental effects when implementing scenarios for the development of energy supply in various territories and categories of energy sources. Scenarios include the transition to environmentally friendly fuels, the introduction of low-carbon technologies, and the use of renewable energy sources. The following indicators were selected as displayed: emissions of pollutants and carbon dioxide into the atmosphere, as well as the amount of ash-and-slag waste generated. The principles of formation of tabular, cartographic and graphic material are presented. The technologies used to create web services are presented. The organization of navigation in the service and updating of information is described.
New conditions for applying surcharges (discounts) to electricity payments for generation and consumption of harmonic component currents
Authors: Chikin Vladislav , Kuznetsov Anatoly
Published: December 2023

Technical means of suppression of harmonic component currents installed in the consumer's electric network are able to reduce the level of harmonic component currents and reduce the harmful effects of their flow. The consumer's interest in installing such means is significantly increased when discounts (surcharges) are applied to the payment for electricity consumed for generation and consumption of harmonic currents. However, the attempt to apply allowances (discounts) has failed in the past. The article proposes to review and discuss new conditions for the application of surcharges (discounts) to the payment for electricity for generation and consumption of harmonic currents, taking into account the unsuccessful experience of use in the past. The article proposes a methodology for calculating and using surcharges (discounts) to the payment for electricity consumption for generation and consumption of harmonic component currents to manage the power quality in the power supply systems of consumers of a grid organization with nonlinear loads.
Markets of Electricity and Heat in the Russian Far East: 30 years of Transformation
Authors: Dyomina Olga , Naiden Svetlana
Published: December 2023

The paper studies transformations in electricity and heat markets of the Russian Far East in 1980-2022. The timeline can be broken down into 4 periods of development in the region: pre-reform (1980-1991), economic reform (1992-1999), electricity market reform (2000-2011), and heat market and institutional reform (2012-2022). Development of electricity and heat markets happened during a period of demand and supply imbalance. High costs of energy supply, deficit of energy, and issues with fuel supply in the pre-reform period worsened in the next period. During economic reforms sharp drop in subsidies, rising costs of energy resources, non-payments for energy, lack of investments caused a massive energy crisis in the region despite sharp drop in demand. From the beginning of 2000s the economy started to recover, with demand of electricity growing. During electricity market reforms the Russian Far East was consolidating assets in electricity and heating industries, forming distinct market segments: non-price zone of wholesale market and retail markets of isolated energy systems. The 2000s continued to be plagued by issues of high deprecation of generators, lack of mass investments for modernization, and high energy prices for consumers. The latter required application of several measures after 2012: special decrees of the President and the Government of Russia to construct new electric power plants, modernize and construct CHP power plants; to provide ready infrastructure for residents of the advanced development territories, financed by the state; the state co-financing network infrastructure and connections for priority investment projects; bringing the tariffs for industrial consumers of certain territories of the region to the level of country average.
Assessment of landscapes transformed during the development of the Verkhne-Taluminskoye field using remote methods
Authors: Nogovitsyn Dmitry , Pinigin Dmitry , Nikolaeva Nadezhda , Sheina Zinaida , Sergeeva Lyudmila
Published: December 2023

Over the past decade, a significant increase in disturbed natural landscapes has been observed on the territory of the Aldan-Chulmansky coal-bearing region. According to our estimates, the area of the quarry-dumping complex here from 2014 to 2022 increased by 50.4% and reached 89 km2. To assess the latest changes in landscapes in this area, the VerkhneTaluminskoye coal deposit was chosen, on the basis of which in February 2018 coal mining began for the first time on the left bank of the river Chulmakan. To establish landscapes, the study area is zoned according to vegetation, which was determined according to satellite images of the Yandex and Mapbox databases. The areas have been divided into types of terrain as well. Thus, it was determined that the largest areas in the study area of the types of terrain are occupied by gentle slopes 46.2 km2 (52.6%), and plateaus are also common 18.1 km2 (20.6%) with elevations of 920-970 m. The contoured layers (vegetation and terrain types) were merged in QGIS3 software to obtain a landscape map of the Verkhne-Taluminskoye field. Further, a layer with the contours of the coal mine as of 2022 was superimposed on it. As a result, a map of the transformed landscapes of the Verkhne-Taluminsky deposit was developed. Quantitative indicators of landscape change in the study area have been established. The most transformed were kurums (rock glaciers) on slopes of medium steepness and gentle slopes 43.5 and 18.3%, respectively, were transformed, as well as closed 27.9% of forests on slopes of medium steepness were transformed. It was revealed that the slopes of medium steepness (10-30°), as well as kurums are disturbed to the greatest extent.
Application of a multi-agent approach to solving problems of development of integrated energy systems
Authors: Stennikov Valery , Barakhtenko Evgeny , Mayorov Gleb
Published: December 2023

Currently, when solving the problems of developing energy systems, it is necessary to take into account the profound changes associated with the transition from consideration of centralized planning and management to a new paradigm of a multilateral process of substantiating decisions and creating mechanisms for their implementation in conditions of uncertainty, multicriteria and a plurality of conflicting interests. The development of modern energy systems requires the use of innovative methods and technologies for their study, which assume the presence of many decision-making centers and take into account the complex structure of these systems. In this paper, to solve the problems of development of integrated energy systems, a multi-agent approach is used, in which solutions are obtained as a result of the interaction between a set of agents. Based on the proposed structure of the multi-agent system, a multi-agent model of an integrated energy system was developed in the AnyLogic software environment. A number of computational experiments were carried out, which made it possible to verify the developed principles of the interaction of objects in an integrated energy system when solving development problems.