bluuebunny/crossref_metadata_2025_split huggingface dataset:
Clarifying the atomic origin of electron killers in β-Ga2O3 from the first-principles study of electron capture rates
Authors: Suo Zhaojun , Wang Linwang , Li Shushen , Luo Junwei 
Published: November 2022

Abstract
The emerging wide bandgap semiconductor

-Ga2O3 has attracted great interest due to its promising applications for high-power electronic devices and solar-blind ultraviolet photodetectors. Deep-level defects in

-Ga2O3 have been intensively studied towards improving device performance. Deep-level signatures E
1, E
2, and E
3 with energy positions of 0.55–0.63, 0.74–0.81, and 1.01–1.10 eV below the conduction band minimum have frequently been observed and extensively investigated, but their atomic origins are still under debate. In this work, we attempt to clarify these deep-level signatures from the comparison of theoretically predicted electron capture cross-sections of suggested candidates, Ti and Fe substituting Ga on a tetrahedral site (TiGaI and FeGaI) and an octahedral site (TiGaII and FeGaII), to experimentally measured results. The first-principles approach predicted electron capture cross-sections of TiGaI and TiGaII defects are 8.56 × 10–14 and 2.97 × 10–13 cm2, in good agreement with the experimental values of E
1 and E
3 centers, respectively. We, therefore, confirmed that E
1 and E
3 centers are indeed associated with TiGaI and TiGaII defects, respectively. Whereas the predicted electron capture cross-sections of FeGa defect are two orders of magnitude larger than the experimental value of the E
2, indicating E
2 may have other origins like CGa and Gai, rather than common believed FeGa.
Bulk GaN-based SAW resonators with high quality factors for wireless temperature sensor
Authors: Lv Hongrui , Shi Xianglong , Ai Yujie , Liu Zhe , Lin Defeng , Jia Lifang , Cheng Zhe , Yang Jie , Zhang Yun 
Published: November 2022

Abstract
Surface acoustic wave (SAW) resonator with outstanding quality factors of 4829/6775 at the resonant/anti-resonant frequencies has been demonstrated on C-doped semi-insulating bulk GaN. The impact of device parameters including aspect ratio of length to width of resonators, number of interdigital transducers, and acoustic propagation direction on resonator performance have been studied. For the first time, we demonstrate wireless temperature sensing from 21.6 to 120 °C with a stable temperature coefficient of frequency of –24.3 ppm/°C on bulk GaN-based SAW resonators.
The impact of disposable mask waste pollution in peat soil
Authors: Mentari Alvi Eka , Khoironi Adian , Hadiyanto  
Published: November 2022

Abstract
The abundance of plastic waste in Indonesia has increased due to the contribution of disposable masks waste during the COVID-19 pandemic. The improper waste management causes the habit of dumping waste in the soil system to still frequently occur. The secondary microplastics from disposable mask waste has the potential to damage soil quality and soil capillary water. Therefore, this study was conducted with the aim of understanding the effects of disposable mask waste in peat soil. The research was conducted by setting up 3 reactors containing peat soil with disposable mask waste buried in it and some plants being grown on it. For 45 days, observations and samples were taken, both filtrate water and soil for analysis. The analysis results showed significant changes in soil properties with changes in the concentration of inorganic matter, organic matter, porosity, bulk density, and water content. Further research needs to be done to see the effects of disposable mask waste in the soil system in real conditions where several confounding variables cannot be controlled.
Upcycle strategy on tree branches to improve eco-efficiency towards a circular economy using life cycle assessment
Authors: Hartini Sri , Rumita Rani , Huda Muhammad Hafidz Al 
Published: November 2022

Abstract
A circular economy (CE) is considered capable of being a solution to reduce the use of natural resources and reduce waste without harm. A circular economy system uses products and materials at maximum value and function. Various strategies were developed for this purpose. However, these efforts often require additional energy and materials to create more valuable products. Does the increase in value-creation mean more than the energy consumption and materials to make it happen? This study conducted a study of efforts to increase wood branch waste, which is usually only used for firewood, which is processed into hanger products with an upcycle strategy. This study uses the eco-efficiency method to determine the increase in value in the economic aspect compared to the environmental impact it causes. The cost of environmental impact is calculated using a life cycle assessment with Simapro software. The findings from this study are that upcycle efforts can increase product eco-efficiency. The eco-efficiency index (EEI) of hanger products is 4.512 and the EEI of firewood is 3.816.
Quality of surface water due to sand mining activity: a case study from the Progo River, Daerah Istimewa Yogyakarta Province, Indonesia
Authors: Trisnaning P T , Zamroni A , Sugarbo O , Prasetya H N E , Sagala S T , Hardiansyah M Y 
Published: November 2022

AbstractDue to sand mining, the study objective is to assess water quality in the Progo River, Daerah Istimewa Yogyakarta Province. It is beneficial to evaluate the physicochemical parameters of the Progo River and to appraise water quality for drinking purposes based on the Indonesia Minister of Health regulation No: 492/ Menkes/Per/IV/2010. The physicochemical parameters used in this study included pH, EC, TDS, DO, SO42-, NO3-, and PO43-. The pH decrease is thought to be due to the opening of sand deposits around the river so that minerals such as feldspar, hornblende, and quartz dissolve and mix in water. The TDS increase was estimated due to the increase in the riverbed and bank erosion associated with sand mining at the mining and downstream sites. In addition, sand mining activities affect higher DO because bubbles aerate flowing water in fast-moving water as it churns over rocks and falls into hundreds of tiny waterfalls. Meanwhile, other parameters, such as EC, SO42-, NO3-, and PO43-are influenced by natural factors, such as seawater mixing and soil erosion. Almost all parameters are permissible for drinking purposes, except for Station 3 at the downstream which TDS and SO42-- values are.
An environmental impact assessment of geothermal tourism: A case study of Awit Sinar Alam Darajat, Garut-Indonesia
Authors: Munfarida I , Nilandita W , Auvaria S W 
Published: November 2022

AbstractGeothermal as one of the potential environmental services in conservation areas is increasingly being taken into account. According to the Government Regulation No. 25 of 2021 on the Implementation of the Energy and Mineral Resources Sector, geothermal can be used directly or indirectly. The geothermal tourism of Awit Sinar Alam Darajat is an example of the direct utilization of geothermal energy for tourism. This study aims to assess the impact of geothermal tourism on the environment and develop environmental management and monitoring. The analysis was carried out utilizing a qualitative and quantitative methods approach. Data were collected from secondary data and analyzed to develop environmental management and monitoring. The result showed that the environmental impact of geothermal tourism includes the change of land use, the decrease in geothermal quantity and the generation of quality, and solid waste. We recommend environmental management, such as setting the minimum standard for the Green Base Coefficient of 70%, geothermal conservation, providing the geothermal treatment plant, and solid waste management. Environmental monitoring should be applied when calculating the Green Base Coefficient and the quantity and quality of geothermal and solid waste generation to achieve the standard.
Learning from Contextual Material Practices in Architecture: Exploring Nature-Based Materials in Indonesia and Thailand
Authors: Paramita Kristanti Dewi , Atmodiwirjo Paramita , Sinuraibhan Soranart 
Published: November 2022

Abstract
This paper outlines pedagogical strategies in architectural design studio to construct awareness of local material practices towards architecture which rooted in its environmental context. Current architectural discourse perceives the notion of material as something separate from its environmental context. Through a joint design workshop conducted between Universitas Indonesia and Kasetsart University, this paper explores existing material practices happening in the local context of Indonesia and Thailand and how it informs material-driven architectural programming. In a group, students were tasked to reconstruct their understanding of materiality, and develop collections of material practices from both countries which revealed various local knowledge, spatiality, and environmental understanding. The workshop then demonstrates important lessons in the ways material triggers programmatic relation between architecture and its surrounding environment. Among these relations are shown in the way nature-driven community events triggers specific material craftsmanship, the connection between material utilisation in the community’s spaces and natural cycles of seasons, and the interdependence between material practices and different geographical positions. Strategies in reconstructing the material knowledge towards material-based programming cross-culturally enables students to reflect on the unique material possibilities, as well as build awareness of local community strategies toward sustainable and material-driven architecture.
A comparison of rap-tourism method and multi attribute aggregation in sustainability assessment of tourist destination
Authors: Putri A A A , Purwaningsih R , Hartini S 
Published: November 2022

Abstract
The development of the tourism industry causes emergence of positive and negative impacts on tourist destinations. The development of the tourism industry has led the government to implement the concept of sustainable tourism. To assist the implementation of sustainable tourism, it is important to know the sustainability status of tourist destinations. The measuring tools used for calculated sustainability index values and identification of sensitive indicators. The method used must be easy to use and provide accurate results. This study compares between the rap-tourism and the multi attribute aggregation method. The aim is to choose which method better in measuring sustainability status when the objects of measurement are a lot of tourist destinations, better means easy to use and represent indicators condition briefly. The results of the assessment using both methods obtain the same sustainability status but there are differences in the sustainability index value. These two methods also use different approaches in determining sensitive indicators that should be improved to increase the sustainability index of tourist destinations.
Tracing flow directions of the Pentung Allogenic River in Gunungsewu Karst Area, Gunungkidul, using artificial tracer test
Authors: Cahyadi A , Adji T N , Haryono E , Widyastuti M , Agniy R F 
Published: November 2022

Abstract
Previous studies in the Gunungsewu Karst Area categorized the Pentung Allogenic River catchment that drains to the Sawah Ombo Pond as the upper part of the Bribin Karst Drainage Basin (KDB). However, more detailed results from natural isotope studies after 2010 have provided reasons to postulate that the groundwater does not flow from the catchment to Bribin KDB. Therefore, the research aimed to trace the direction of Pentung’s groundwater flows in Gunungsewu’s karstic hydrogeological system. To achieve this, an artificial tracer test was used. There were two fluorescent dye injection namely uranine and tinopal. The results confirmed that the allogenic river’s catchment supplied groundwater to Beton KDB instead of Bribin KDB. While the artificial tracers were not detected in the water at Gilap Cave and Bribin Underground River, they appeared in Jomblangan Cave and Sriti Spring, parts of Beton KDB.
The Seafarer’s Level of Understanding on Ballast Water Management Convention
Authors: el Husna Iksiroh , Wahdiana Dian , Nasri  , Wijinurhayati Anissofiah Azise , Putri Widya 
Published: November 2022

Abstract
Due to practical and economic considerations, the sea transportation is increasingly in demand as a means of transporting world trade activities. The ships without cargo will use ballast water as a stabilizer. Ballast water is often carried by various foreign microorganisms that harm the ecosystem. IMO promulgated the 8 September 2017 Ballast Water Management (BWM) Convention to prevent the spread of harmful pathogenic microbes. This study aims to determine the understanding of seafarers of the provisions of BWM. The descriptive-analytical method used a cross-sectional approach using questionnaires and in-depth interviews. The sample consisted of 47 seafarers; 3 samples were removed because they did not meet the requirements. The results show that most respondents do not understand the provisions of BWM correctly. None of the respondents knew when the BWM was enacted. In some questions, less than 10% of the answers are correct. However, on the importance of handling ballast water, there is 43.18% answered correctly, meaning that there is a concern for respondents about the dangers of it, and it is essential to address it immediately. We suggest that socialization among seafarers can be through seminars or special training on ballast water.
Study of environmental carrying capacity in Pemalang Regency
Authors: Kahfi A H , Samadikun B P , Sarminingsih A 
Published: November 2022

Abstract
To achieve sustainable development goals, the environment is one of the aspects that is taken into account. Environmental problems such as population growth, changes in land use, climate change lead to a decrease in the carrying capacity of the environment for the community. Pemalang Regency is included in the administrative area of Central Java Province, Indonesia. This writing aims to determine the extent of the Environmental Carrying Capacity in Pemalang Regency in the sector of water resources and land availability, as well as the resilience of the Environmental Carrying Capacity to the projected population growth in Pemalang Regency. This study found that the water resources sector has deficit since the first year of projected population growth in 2020. While in the land availability sector, it was found that the surplus condition occurred in the first year of projected population growth from 2020 to 2022
Business Model Innovation: Lesson Learned From EV Ecosystem In Indonesia
Authors: Amir M T , Prabawani B 
Published: November 2022

Abstract
Although relatively developed in advanced countries, the electric vehicle (EV) industry in Indonesia is still in the early stages of development. Designing a business model with an ecosystem perspective is critical for relevant stakeholders because there are still many uncertainties to be faced, including the unclear structure of the industry. This study examines the case of how an e-bus company creates a business model by taking into account the important role of stakeholders in their ecosystem. Top management of a manufacturing company and its parent company were in-depth interviewed. The roles and critical challenges of regulators, battery manufacturers, and assembly plants are explored. The practice of creating business models will be compared with applying business models in the literature. The discussion will focus on the need of the focal company in creating value through approaching regulators, collaborating with battery manufacturer, and creating communication as the innovations. The findings in this study are expected to be input for e-bus business actors for sustaining the development stage and stakeholders in the existing ecosystem, including the government or regulators.
Adaptation Strategies of Grobogan Regency Farmers in Face of Climate Change
Authors: Esariti L , Nida R S , Handayani W , Rudiarto I 
Published: November 2022

Abstract
The advent of climate change in Grobogan Regency is marked by the lengthy dry season, prevalence of rat attacks and changes in the growing season due to weather instability. This article aims to explore adaptation strategies for farmers in dealing with the problem of declining crop productivity due to climate change. Based on observations, expert interviews, and questionnaires delivered to the population, it was concluded that the strategies implemented among the farmers were aimed at maintaining livelihoods. The survey results indicated that there were different agricultural patterns in the western and eastern parts of Grobogan Regency and, as such, the farmers employed different adaptation strategies respective to their locations. In West Grobogan, focus was put on managing farmland with irrigation sourced from the Glapan dam. Meanwhile, in East Grobogan, rainfed agriculture, particularly for corn and soybean commodities, was customary. Analysis of the exploratory research suggested that 2 adaptation strategies are implemented by the farmers. First, the farmers commonly migrate and seek supplementary jobs to ensure income stability. Second, the farmers use planting techniques and seeds with superior quality and short harvest periods, which they invented.
Comparative study of upconversion and photoacoustic measurements of Er3+/Yb3+ doped La2O3 phosphor under 980 nm
Authors: Sarkar Minarul I , Mishra Neeraj Kumar , Kumar Kaushal 
Published: November 2022

Abstract
The Er3+/Yb3+doped La2O3 phosphor samples were synthesized by the combustion method and then photoluminescence and photoacoustic spectroscopic studies were done. Prepared samples were annealed at 800 °C, 1000 °C and 1300 °C and all samples were found in pure hexagonal phase as confirmed by XRD analysis. From FE-SEM images it is found that particle size increases with increase in annealing temperature. The frequency upconversion emission spectra of samples were recorded by exciting the sample with 980 nm diode laser and maximum emission intensity is obtained for the sample annealed at 1000 °C for 2 h. A photoacoustic cell was designed and wavelength dependent photoacoustic spectra were measured. The effect of sample storage time on radiative and non-radiative emission properties of sample was checked by measuring upconversion emission and photoacoustic spectra, simultaneously. It is observed that the emission intensity and photoacoustic signal both decreases with time. The maximum photoacoustic signal is obtained around 974 nm wavelength and it indicates its potential for photo-thermal therapy using infrared excitation.
A study of the processing and characterization of RSM optimized YSZ-Inconel625 wear-resistant TIG weld cladding
Authors: Kamboj Neeraj , Thakur Lalit 
Published: November 2022

Abstract
The present investigation focuses on developing a wear-resistant Yttria Stabilized Zirconia (YSZ) reinforced Inconel-625 (IN625) based TIG weld composite cladding on the AISI 304 stainless steel substrate. TIG welding current, scanning speed, standoff distance and YSZ reinforcement % were the primary input process parameters for cladding deposition. For the optimization of process parameters, cladding was deposited at different parametric settings, and their microhardness and sliding wear resistance was calculated as the output responses, according to Box Behnken Design (BBD) under Response Surface Methodology (RSM). Feedstock powders, developed claddings and worn samples were examined to study their surface morphology, microstructure, element composition and different phases using the SEM, Optical Microscopy, EDS, and XRD techniques. The result revealed that welding current and scanning speed are the most significant factors which govern the mechanical and tribological properties of cladding. The cladding was deposited at an optimized welding current 70 A, scanning speed of 192 mm min−1, standoff distance of 2 mm, and 25 wt.% YSZ reinforcement concentration revealed the fine and dense microstructure, resulting in maximum hardness and minimum wear. The microstructure was observed to be columnar dendrites, which grew epitaxially from the substrate. The addition of YSZ particles into the IN625 matrix resulted in the formation of Cr2O3 and ZrO2 stable oxides along with γ-Ni (FCC) phases. The wear test showed that the weight loss in claddings was mainly due to abrasive wear.
The use of dynamic CT imaging for tracking mandibular movements in a phantom
Authors: Huys Stijn E F , Keelson Benyameen , de Brucker Yannick , Van Gompel Gert , de Mey Johan , Vander Sloten Jos , Buls Nico 
Published: November 2022

Abstract

Purpose. The objective of this study was to analyse the possibilities of using 4D CT scanning for the tracking of patients’ mandibles. Methods. A clinical 256-slice Revolution CT was used in obtaining 4D CT scans without table movement, with a novel mandibular phantom, mounted on a programmable six degrees-of-freedom Stewart Platform in motion. The phantom was used to simulate mandibular motions which are combinations of rotations with translations (depression, elevation, protrusion, retrusion and laterotrusion). The phantom was scanned five times during identical motion patterns with a dynamic CT acquisition protocol. An image processing workflow consisting of a pairwise rigid registration and semi-automatic segmentation was developed to extract kinematic parameters (cardan angles and point-of-interest displacements) from the dynamic sequences. Reproducibility was investigated by the 95% confidence interval and the absorbed organ dose to organs of interest in the primary beam were also estimated and compared to those of a standard CT scan of the brain Results. The maximum average 95% confidence interval for the displacement across all time points for the five repetitions was 0.61 mm (Y axis). In terms of rotations, the maximum average 95% confidence interval across all time points for the five repetitions was 1.39° (X axis). The effective dose for the dynamic scan was found to be 1.3 mSv, for a CTDIvol of 63.95 mGy and a DLP of 1023.14 mGycm. The absorbed organ doses were similar to organ doses during a clinical head CT scan. Conclusions. A framework is proposed to use 4D CT scanning as a possible methodology to evaluate the motion of the temporomandibular joint. The scanning protocol allows to visualise the motion by applying a semi-automated segmentation and registration. A graphical representation of all displacements in the three spatial dimensions can depict multiple points-of-interest at once during the same acquisition. A novel type of phantom was also introduced which simulates mandibular movement with six degrees-of-freedom (three translations and three rotations).