bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Size Measurement Method of Underwater Parts Based on Machine Vision
Authors: Zhong Chaochun , Ma Qingliang , Ma Tingting 
Published: September 2024

Abstract
In order to measure the deformed parts under pressure, a size measurement method of underwater parts based on machine vision is proposed, whereas the relative position between the camera and target parts remains basically unchanged. Firstly, the imaging theory of the underwater camera is analyzed, and the mathematical relationship between the size of the target object and the number of pixels is established; Then, the underwater parts measurement system based on machine vision is built, and the image processing algorithm is studied to extract the target size; Thirdly, the genetic algorithm is studied to calibrate the camera measurement system; Finally, the relevant experiment is conducted on the underwater parts measurement system. Through the analysis of the results, the measurement uncertainty of the system is 0.0355mm, and the relative error is 0.1%. The underwater parts measurement system has practical value.
Development of a strip-shaped X-ray mapping system for 9-cell superconducting cavities
Authors: Kuriyama Y. , Iwashita Y. , Fuwa Y. , Tongu H. , Hayano H. , Geng R.L. 
Published: September 2024

Abstract
Electrons emitted via field emission during superconducting
(SC) radio-frequency (RF) cavity tests at vertical test stands often
collide with the iris region inside the cavity, generating X-rays at
these locations. In 1.3 GHz 9-cell SC RF cavities designed for the
International Linear Collider (ILC), stiffener rings located outside
the iris region between cells can interfere with X-ray detection,
complicating the precise identification of field emission sites.
Hence, we developed a high-density strip X-ray mapping systems
(sX-map) that can be inserted into the iris region of ILC-type
9-cell SC RF cavities. This sX-map facilitates efficient and
accurate detection of X-rays generated near the irises, unaffected
by the presence of stiffener rings. The sX-map consisted of 32
sensors per strip, with sensors spaced approximately 10 mm apart.
It was deployed in every iris of the 9-cell cavity, using a total of
320 sensors. A multiplexer was employed to facilitate the readout of
a large number of detectors using a minimal number of signal lines,
connecting the strips inside within the vertical test cryostat. In
a vertical test conducted at Jefferson Lab (JLab), we demonstrated
the capability of sX-map to detect X-rays despite the presence of a
stiffener ring. This paper presents the detailed design of the
sX-map and the results from the vertical test at JLab.
Observational constraint on climate model projections of global compound hot–dry events and the socioeconomic risks under climate change
Authors: Yao Lei , Leng Guoyong , Yu Linfei , Tu Haiyang , Qiu Jiali 
Published: September 2024

Abstract
The frequency of compound hot–dry events (f
HD) is projected to increase significantly with future warming, yet associated uncertainties remain considerable and poorly constrained. In this study, we constrain future projections of f
HD (2070–2099) using observations of recent trends in temperature (T) and precipitation (P) (1980–2014) during the warm-seasons. The physical mechanism is that the variance of f
HD across climate models is dominated by their projected changes in P (ΔP), which can be constrained by recent trends in T and P. Compared to the raw projections, the observationally constrained f
HD is reduced by 9.68%–18.74%, with uncertainty narrowed by 3.79%–10.66% under the high emission scenario. The highest decline of f
HD is located in regions with low population and gross domestic product (GDP), and globally, population and GDP exposures to f
HD are reduced by 6.02%–10.73% and 6.51%–12.03%, respectively. The observationally constrained f
HD with lower uncertainty provides more reliable information for risk management under climate change.
A numerical study of the generalized Steklov problem in planar domains
Authors: Chaigneau Adrien , Grebenkov Denis S 
Published: September 2024

Abstract
We numerically investigate the generalized Steklov problem for the modified Helmholtz equation and focus on the relation between its spectrum and the geometric structure of the domain. We address three distinct aspects: (i) the asymptotic behavior of eigenvalues for polygonal domains; (ii) the dependence of the integrals of eigenfunctions on domain symmetries; and (iii) the localization and exponential decay of Steklov eigenfunctions away from the boundary for smooth shapes and in the presence of corners. For this purpose, we implemented two complementary numerical methods to compute the eigenvalues and eigenfunctions of the associated Dirichlet-to-Neumann operator for planar bounded domains. We also discuss applications of the obtained results in the theory of diffusion-controlled reactions and formulate conjectures with relevance in spectral geometry.
Enhancement of gaseous toluene removal by photocatalysis using hydrothermal synthesis carbon nanodots/TiO2 combined with zeolite ZSM-5
Authors: Thuan N M , Nhan N V H , Hieu T L M , Oanh N T K , Linh N T M , Phuong N T T , Duong N T H , Long N Q 
Published: September 2024

Abstract
Many studies have been conducted to produce composite materials that possess the ability to transform volatile organic compounds (VOCs) to other nontoxic forms economically and environmentally by means of photocatalytic method. However, the main drawbacks of these materials include restricted surface area, low affinity towards organic molecules, and wide band gap energy which dramatically inhibit their performance. In this research, a composite material that surpasses the above disadvantages has been successfully synthesized from TiO2 - carbon nanodots (CDs) - zeolite ZSM-5. Particularly, CDs synthesized by bottom-up method were coated on TiO2 before being uniformly distributed on zeolite ZSM-5. The powder samples with varying CDs/TiO2 and zeolite ZSM-5 content were tested for their photocatalytic oxidization capability to determine the appropriate ratio. The results revealed that samples with higher zeolite content improved photocatalytic activity. Under other survey conditions such as low toluene flowrate, high relative humidity as well as high UV intensity, the photocatalytic performance was enhanced notably. The newly produced material has corrected most disadvantages of traditional photocatalysts, however, further researches need to be made to improve the removal stability.
Radionuclide characterization and handling strategy of irradiated Fission Product Material (FPM) capsule waste from molybdenum-99 production
Authors: Aisyah  , Artiani P. A. , Rachmadetin J. , Parjono  , Saputra D. L. I. , Setiawan R. , Heriyanto K. , Ratiko  , Wati  , Purwanto Y. , Nurliati G. , Mirawaty  
Published: September 2024

Abstract
Irradiated FPM Capsule waste is one of the types of radioactive waste generated from Molybdenum-99 (99Mo) production. This 99Mo is a 99mTc parent radionuclide that is used for the diagnosis of human organ disorders. In its production, the capsule is used for the emplacement of uranium target for irradiation in the GA Siwabessy Reactor. Since the beginning of production until now, the irradiated FPM capsules waste are still being stored in the hot cells because no data on their characteristics and handling systems that are necessary for their treatment. However, long-term storage of the FPM capsules waste in the hot cells shall be avoided because it can disrupt the production process of 99Mo and pose radiation risk to workers. The objectives of this research are to characterize radionuclides composition in the FPM capsule waste and identify its appropriate handling system. The radionuclides characterization was carried out using ORIGEN 2.1 software whereas the selection of the handling system was based on the suitability or modification of the available facilities at Radioactive Waste Management Installation (RWMI)-BRIN. The characterization results show that up to a decay time of 50 years, an FPM capsule waste contains activation product radionuclides such as 55Fe, 59Ni, and 63Ni with a total specific activity of 7.11x106 Bq/g. Three FPM capsule waste handling systems were identified that can be implemented at the RWMI facility, namely by using a 350 -liter concrete shell and then storing in an interim storage for low and intermediate-level waste, using a 60-liter stainless-steel canister which is then stored in the interim storage pit for high-level waste, or by modifying the interim storage pit for high-level waste. Radionuclide characterization and appropriate handling systems are required for the safe management of irradiated FPM capsule waste. This FPM capsule waste management is important for human and environmental protection.
Facile room temperature synthesis of MIL-100(Fe) from magnetic zircon tailing and its application for methylene blue removal
Authors: Karelius K , Ediati R , Santoso E , Santoso U T , Atmaja L , Kulsum U , Faaizatunnisa N , Agnestisia R 
Published: September 2024

Abstract
Some of the dominant minerals found in the magnetic separation of zircon tailing are minerals containing iron (Fe). These materials have the potential to be processed into adsorbents. One of the materials synthesized using iron compounds as a precursor is MIL-100(Fe). The aim of this research was to obtain MIL-100(Fe) by utilizing magnetic zircon tailing, and applied as an adsorbent for methylene blue. The synthesis of MIL-100(Fe) was initiated by destruction of magnetic zircon tailing with HCl, followed by reacting the destruction filtrate with trimesic acid (H3BTC) for 24 hours at room temperature, in which the H3BTC was dissolved in NaOH with a molar ratio of 1.5 Fe : 1 H3BTC : 3 NaOH, prior to the reaction. A reddish orange precipitate obtained was then washed, dried, and characterized by using FTIR, XRD and SEM. Characteristics of FTIR spectra, XRD pattern and SEM images was similar with MIL-100(Fe) reported. The best-fitting model for the adsorption mechanism was the pseudo-second order. The most suitable adsorption isotherm was the Langmuir model. The maximum adsorption capacity of MIL-100(Fe)-W (222.89 mg/g) was higher than that of MIL-100(Fe)-C (151.59 mg/g). The result indicated that iron content in magnetic zircon tailing can be used as precursor for synthesis of MIL-100(Fe).
Synthesis of ferrate by electrolysis of iron at extreme pH for remediation of aquatic environments from dye and antibiotic wastes
Authors: Gunawan  , Prasetya N B A , Wijaya R A 
Published: September 2024

Abstract
The presence of dyestuffs and antibiotics in aquatic environments creates toxic contaminants and microbial resistance, which are harmful to human health and require special handling methods. The Advanced Oxidation Process method with ferrate (Fe(VI)) oxidising material has the potential for effective degradation of water pollutants, is environmentally friendly, and is easy to prepare. Therefore, in this study, ferrate synthesis from the electrolysis of iron at extreme pH for the remediation of the aquatic environment from waste dyes and antibiotics has been successfully carried out. Electrolysis was performed in a 14 M NaOH electrolyte using iron and zinc plates as anode and cathode electrodes, respectively. The effects of synthesis parameters such as time, NaOH concentration, and ferrate stability were observed. In addition, ferrate was applied to degrade the dyes methylene blue and the antibiotic ciprofloxacin. The degradation mechanism and application parameters such as pH, dosage, and time were also observed. The success of the synthesis was confirmed by the presence of FeO(OH) groups and the Na2FeO4 peaks characterised using FTIR, XRF, and XRD. Ferrate application for dyes obtained the best results on methylene blue degradation of 98% at pH 8 and a contact time of 70 minutes. The optimum ciprofloxacin degradation of 86.7% was obtained at pH 7 and 120 minutes. Dye degradation occurs through the breakdown of the C-S=C and azo (N=N) bonds. In contrast, in antibiotics, it occurs through the reaction of HFeO4
−/H2FeO4 with the active site of the piperazine ring. This shows that ferrate can potentially produce water remediation from dye and antibiotic waste for a better environment.
Mercury absorption using rice husk charcoal inoculated with five resistant bacteria
Authors: Efadeswarni  , Akhadi D H , Suyanti S , Herlina S , Amandita F Y , Suryati T , Andriyani R , Gafur N A , Apriyana A Y , Zulaikha S , Hidayati N , Ambarsari H 
Published: September 2024

Abstract
The use of biosorption for the rehabilitation of polluted water and soils has recently gained popularity. Biosorption is a low-risk method that immobilizes harmful compounds by employing organic waste. Mercury contamination in Indonesia requires an immediate remedy that is both inexpensive and applicable in rural regions where pollution sources are concentrated. The current study aims to investigate the usage of various organic materials, namely rice husk charcoal, compost, coco dust, and zeolite, as biosorption agents for mercury remediation through collaboration with mercury-resistant bacteria. Five previously examined bacteria strains were shown to be viable only in compost and rice husk charcoal after 30 days of observation. Further research on rice husk charcoal has shown that it might reduce mercury contamination in liquid medium with and without the inclusion of microorganisms. At 24 hours, the partnership of rice husk charcoal and mercury-resistant bacteria was shown to be more successful in absorbing the mercury by up to 66 percent. In contrast, biochar alone can only absorb mercury by up to 31 percent. This suggests that the activity of the bacteria can boost biochar’s capability to immobilize the mercury compound. Thus, the utilization of rice husk biochar amended with mercury-resistant bacteria is valuable and should be further studied as a possible mercury bioremediation agent.
From waste to an added-value commodity: challenges in valorization opportunity of tin-residual sand for silica-based industry
Authors: Sulista S 
Published: September 2024

Abstract
Extensive tin mining activities produce sand piles with high silica, leaving vast environmental and economic responsibilities. The circular economy implementation can address these problems by valorizing quartz sand as industrial sand. Therefore, the study assesses the quartz sand left over from tin mining and processing activities on Bangka Island to become a valuable product within the CPQvA Framework consisting of classification (C), potential utilization (P), quantity and viability (Qv), and application (A). The criteria comprise 12 weighted questions to define the criticality indices categorized as easy, moderate, and difficult. With complex purification technology, quartz sand can be used as silica sand for ceramics, foundry mould, refractory bricks, glass, and solar cells. The quantity is large and feasible for a factory scale with expensive investment and operational costs. The product performance shows good quality from a technical aspect. Due to impurities content and its complex purification technology, the valorization of quartz sand produces a difficult criticality index for the solar cells, a moderate criticality index for the glass and ceramics industry, and an easy criticality index for the glaze, refractory brick, and foundry mold industries. Therefore, proven and efficient purification technology is crucial for further research.
Enhancing aquaponic cultivation in Indonesia: A comparative study of bioball biofilters with different additives
Authors: Taufikurahman Taufik , Tri Astutiningsih Novi , Shofiyah Ulfa Nanda , Aliyyatussaadah Izma , Izzurahman Thoriq 
Published: September 2024

Abstract
The development of aquaponic cultivation in Indonesia remains limited despite its potential to significantly boost farmers’ and communities’ income. In aquaponics, fish are regularly fed, while plants solely rely on nutrients derived from leftover feed and fish waste, without external supplementation. Biofilters play a crucial role in aquaponic systems, providing a growth medium for microorganisms that convert fish feces’ ammonia into nitrates, essential for plant nutrition. In general, biofilters use bioball material, so as to optimize the biofilter, this study compares the effectiveness of different materials, namely activated charcoal, shells, and coconut fiber, when incorporated into bioball biofilters within aquaponic systems. The research was conducted on an aquaponic installation featuring an NFT system utilizing PVC pipes. The experiment involved 45 tilapia fish, each measuring 7-11 cm and weighing 10-15 grams, alongside red lettuce plants planted in 10 holes per pipe, with 6 replications. After 45 days from planting, the plants were harvested, and observations were made on both plant and fish growth. The growth of red lettuce plants in the biofilter installation with shells addition (BS) showed the best results based on parameters such as plant height, leaf width, plant dry weight, and shoot:root ratio. The installation with coconut fiber addition (BS) showed the best results in terms of number of leaves. BA installation with activated carcoal addition (BA) showed the best results in terms of number of Leaf chlorophyll. The highest percentage of survival for Nile tilapia was observed in the BS and BA installation with a rate of 88.89%, followed by 78.57% in the BC installation, and 60.46% in the BB installation.
PLTBg investment analysis from agricultural organic waste to produce electrical energy: preliminary potential analysis study and investment in the Caringin Main Market, Bandung
Authors: Priantoro E A , Butar Butar E S , Sembiring T 
Published: September 2024

Abstract
Biogas is a product of the decomposition of organic matter by microbial decomposers under anaerobic conditions. Biogas consists of various gases, especially methane, carbon dioxide, hydrogen, H2S and other gases as impurities. Biogas can be converted into fuel or electrical energy. One of the potential biogas raw materials is agricultural organic waste. This article and study are based on a survey of the potential for agricultural organic waste produced by the Caringin Main Market. Bandung and the amount of organic waste production reached 84 tons/day, resulting from the trading process in the market. The waste produced by the market is suitable to be used as biogas with an organic content of more than 97.7%; the remaining 2.3% is inorganic waste. Based on the economic and financial analysis, the NPV value was 356,487,559,415.34 and the IRR was 23%, which means it was higher than the interest rate set by the bank, while the PBP value was 5.8 years, much lower set by investors for 10 years and Profitable Index of 4,2 so that this project is declared economically and financially feasible.
Investigating the potential of deep eutectic solvents for metal recovery from spent lithium-ion batteries
Authors: Widya Aryani M , Manaf Azwar , Bahfie Fathan , Sapto Handoko Anton , Prasetyo Erik 
Published: September 2024

Abstract
The development of electric vehicles and portable electronic devices has increased the use of lithium-ion batteries, resulting in increased battery waste. Currently, efficient, and environmentally friendly lithium-ion battery recycling technology is needed to reduce environmental pollution due to LIB waste. Deep eutectic solvent (DES) is attracting attention as an environmentally friendly solvent that can be used in recycling processes. This research aims to obtain Co and Mn elements from recycled lithium-ion batteries using the leaching method using DES. In the DES synthesis process, ChCl is used as a hydrogen bond acceptor (HBA) and oxalic acid as a hydrogen bond donor (HBD) with an HBA/HBD ratio (1/1). Deep eutectic solvent ChCl: oxalic acid is used as a solvent in the process of leaching valuable metals from used lithium-ion batteries. The effect of temperature and time will be investigated on the leaching recovery. These variables include temperature variations (30°C, 55°C and 80°C), time variations (1,3,5,7, and 10 minutes) and S/L 1gr/50ml with a stirring speed of 1000rpm. The results showed that the leaching recovery of Co was 62.88% and Mn was 43.56% at a temperature of 80°C for 10 minutes.
Assessment of the level of heavy metal pollution in the river sediments near the landfill area
Authors: Wardhani E , Manova N A , Irmansyah A Z 
Published: September 2024

Abstract
A landfill creates new problems for the surrounding environment if the landfill is not managed properly. Some of the impacts of a poorly managed landfill can cause on the water and soil, and the potential for pollution to both is also very large. The parameter of heavy metal is one of the lines of landfill operations. The parameters of heavy metals come from the accumulation of organic and inorganic waste decomposition results. This study aims to analyze the concentration of heavy metals in water and river sediments adjacent to the landfill. The research location was carried out at two points: before and after the Sarimukti landfill. Measurement of heavy metal concentrations was carried out at Cipanawuan River by measuring Atomic Adsorption Spectrophotometry (AAS). Based on the research, it can be concluded that no heavy metal concentrations were detected in the water but were detected in the sediment. Compared to the ANZECC standard, the concentration of heavy metals in sediments still meets the standards. How to identify sediment quality is calculated using CF, Igeo, and MPI. The risk of heavy metal content in sediments is analyzed by PERI calculation. Based on the research, it is known that the CF value has a low level of pollution. Based on the Igeo value, it is not polluted to moderately polluted. Based on the MPI calculation, it is not polluted and has low ecological risk.
Building resilience of the green product supply chain in the apparel industry
Authors: Trihastuti D , Gunawan I , Sianto M E , Sagitha B R R 
Published: September 2024

Abstract
Implementing a green supply chain does not necessarily increase supply chain resilience. Industries with green product labels generally face more significant supply chain challenges. These challenges can come from internal or external disruptions. Therefore, building supply chain resilience (SCRes) capability is one strategy to survive and overcome disruptions while practising green business. Resilience is the ability of a system to respond to disturbances that occur due to an event. Strategic SCRes capabilities enable the supply chain to develop survival capacities that can absorb, adapt, and restore to form a new business model. This study investigates the gap between the resilience capability performance in the green supply chain and stakeholders’ expectations. It took place in an apparel manufacturer in Indonesia that supplies and produces for various global fashion brands where high environmental performance is required. A survey was conducted of 45 experts in the apparel supply chain to determine the SCRes’ capabilities. It employs the Importance Performance Analysis (IPA) method to analyze the result. The analysis includes the extent of the SCRes capabilities practices. It also examines the degree of gaps, whether larger or smaller, in positive or negative trends. The research found that the most challenging disruption in the green apparel supply chain is the availability of green material. The result shows that effective communication and coordination are the most significant SCRes capabilities. The second is the supply chain readiness toward demand fluctuation. Furthermore, the IPA results provide recommendations for increasing the resilience performance of the green supply chain in the apparel industry.