bluuebunny/crossref_metadata_2025 huggingface dataset:
Precise physical parameters of three late-type eclipsing binary giant stars in the Large Magellanic Cloud
Authors: Rojas García G. , Graczyk D. , Pietrzyński G. , Gałan C. , Gieren W. , Thompson I. , Suchomska K. , Kałuszyński M. , Soszyński I. , Udalski A. , Karczmarek P. , Narloch W. , Górski M. , Wielgórski P. , Zgirski B. , Miller N. , Hajdu G. , Pilecki B. , Taormina M. , Lewis M.
Published: November 2024

Context. Detached eclipsing binaries (DEBs) allow for the possibility of a precise characterization of their stellar components. They offer a unique opportunity for deriving their physical parameters nearly independent of a model for a number of systems consisting of late-type giant stars. We aim to expand the sample of low-metallicity late-type giant stars with precisely determined parameters.

Aims. We determine the fundamental parameters, such as the mass and radius, or the effective temperature for three long-period late-type eclipsing binaries from the Large Magellanic Cloud: OGLE-LMC-ECL-25304, OGLE-LMC-ECL-28283, and OGLE-IV LMC554.19.81. Subsequently, we determine the evolutionary stages of the systems.

Methods. We fit the light curves from the OGLE project and radial velocity curves from high-resolution spectrographs using the Wilson-Devinney code. The spectral analysis was performed with the GSSP code and resulted in the determination of atmospheric parameters such as effective temperatures and metallicities. We used the isochrones provided by the MIST models based on the MESA code to derive the evolutionary status of the stars.

Results. We present the first analysis of three DEBs composed of similar helium-burning late-type stars that pass through the blue loop. The estimated masses for OGLE-LMC-ECL-29293 (G4III + G4III) are M1 = 2.898 ± 0.031 and M2 = 3.153 ± 0.038 M⊙, and the stellar radii are R1 = 19.43 ± 0.31 and R2 = 19.30 ± 0.31 R⊙. OGLE-LMC-ECL-25304 (G4III + G5III) has stellar masses of M1 = 3.267 ± 0.028 and M2 = 3.229 ± 0.029 M⊙ and radii of R1 = 23.62 ± 0.42 and R2 = 25.10 ± 0.43 R⊙. OGLE-IV LMC554.19.81 (G2III + G2III) has masses of M1 = 3.165 ± 0.020 and M2 = 3.184 ± 0.020 M⊙ and radii of R1 = 18.86 ± 0.26 and R2 = 19.64 ± 0.26 R⊙. All masses were determined with a precision better than 2% and the precision for the radii is better than 1.5%. The ages of the stars are in the range of 270–341 Myr.
A tell-tale tracer for externally irradiated protoplanetary disks: Comparing the [C I] 8727 Å line and ALMA observations in proplyds
Authors: Aru M.-L. , Maucó K. , Manara C. F. , Haworth T. J. , Ballering N. , Boyden R. , Campbell-White J. , Facchini S. , Rosotti G. P. , Winter A. , Miotello A. , McLeod A. F. , Robberto M. , Petr-Gotzens M. G. , Ballabio G. , Vicente S. , Ansdell M. , Cleeves L. I.
Published: November 2024

The evolution of protoplanetary disks in regions with massive OB stars is influenced by externally driven winds that deplete the outer parts of these disks. The winds have previously been studied via forbidden oxygen emission lines, which also arise in isolated disks in low-mass star-forming regions (SFRs) with weak external UV fields in photoevaporative or magnetic (internal) disk winds. It is crucial to determine how to disentangle external winds from internal ones. Here, we report a proxy for unambiguously identifying externally driven winds with a forbidden line of neutral atomic carbon, [C I] 8727 Å. We compare for the first time the spatial location of the emission in the [O I] 5577 Å, [O I] 6300 Å, and [C I] 8727 Å lines traced by VLT/MUSE-NFM with the ALMA Band 7 continuum disk emission in a sample of 12 proplyds in the Orion Nebula Cluster (ONC). We confirm that the [O I] 5577 Å emission is co-spatial with the disk emission, whereas that of [O I] 6300 Å is emitted both on the disk surface and on the ionization front of the proplyds. We show for the first time that the [C I] 8727 Å line is also co-spatial with the disk surface in proplyds, as seen in the MUSE and ALMA data comparison. The peak emission is compatible with the stellar location in all cases, apart from one target with high relative inclination with respect to the ionizing radiation, where the peak emission is located at the disk edge in the direction of the ionizing radiation. To verify whether the [C I] 8727 Å line is detected in regions where external photoevaporation is not expected, we examined VLT/X-Shooter spectra for young stars in low-mass SFRs. Although the [O I] 5577 Å and 6300 Å lines are well detected in all these targets, the total detection rate is ≪10% in the case of the [C I] 8727 Å line. This number increases substantially to a ∼40% detection rate in σ-Orionis, a region with higher UV radiation than in low-mass SFRs, but lower than in the ONC. The spatial location of the [C I] 8727 Å line emission and the lack of its detection in isolated disks in low-mass SFRs strongly suggest that this line is a tell-tale tracer of externally driven photoevaporative winds, which agrees with recent excitation models.
The influence of turmeric supplementation in feed on the growth performance of Asian Redtail Catfish (Hemibagrus nemurus)
Authors: Rahmadani Siagian Desi , Suharman Indra , Fatmawati Riska , Rangkuti Putra
Published: November 2024

Asian redtail catfish farming faces challenges with low seed production, necessitating improved feeding strategies to boost production. Antioxidants, such as those found in turmeric, are considered crucial feed ingredients. This research investigated the impact of turmeric-enriched feed on the growth performance of Asian redtail catfish. Five experimental treatments were formulated with varying turmeric concentrations: P1: 0.0 g kg-1 feed, P2: 0.5 g kg-1 feed, P3: 1.0 g kg-1 feed, P4: 1.5 g kg-1 feed, P5: 2.0 g kg-1 feed; each treatment had three replications. 20 juveniles of Asian redtail catfish were reared in 10-liter aquariums. The study duration was 55 days. Fish were fed to satiation three times a day (8:00 AM, 1:00 PM, 6:00 PM). Turmeric-supplemented diets resulted in increased final body weight, greater absolute length, higher specific growth rate, enhanced feed intake, and improved feed conversion ratio. Meanwhile no significant differences were observed in feed efficiency and survival rate. The study demonstrates that incorporating turmeric into the feed can effectively promote growth in Asian redtail catfish. These findings suggest that turmeric supplementation could be a valuable strategy for improving production in Asian redtail catfish culture.
Characterization of temperature and quality changes in african catfish (clarias gariepinus) during domestic refrigeration
Authors: Pamungkas Amin , Fauzi Ahmat , Pranoto Indro , Sedayu Bakti Berlyanto , Hakim Arif Rahman , Herawati Ervika Rahayu Novita , Waluyo Joko , Sugiharto Sugeng Pondang , Siregar Zaenal Arifin
Published: November 2024

Fish is now one of the most popular and nutritious foods. In Indonesia, fish consumption has risen by 7.4% annually, from 38.14 to 54.5 kg per capita between 2014 and 2019. African catfish (Clarias gariepinus) is one of the most commonly consumed fish, often stored in household refrigerators. However, detailed studies on the temperature and quality changes of fish during refrigeration are limited. This study aims to explore the characterization of the temperature and quality changes of African catfish during storage in household refrigerators. In this experiment, the fish were stored in three compartments of the refrigerator: freezing (R1), chilling 1 (R2), and chilling 2 (R3), for a duration of three days. The temperature of both the fish and the refrigerator compartments was measured every 15 seconds. Additionally, electrical current was monitored to assess energy consumption. The quality of the fish, including total volatile basic nitrogen (TVB-N), moisture content, protein content, and mass (weight loss) was analyzed before and after the storage period. The refrigerator was also subjected to door-opening treatments to observe any impact. The study provides detailed insights into the temperature dynamics of African catfish, the room temperature inside the refrigerator, cooling times, fish quality changes (TVB-N, moisture, protein, mass), energy consumption, and the effect of refrigerator door openings.
Evaluation of mangrove area and density changes in the North Rupat Regional Marine Reserve Conservation Area, Riau, Indonesia
Authors: Volcherina Darlis Viny , Oktorini Yossi , Prianto Eko , Fatmawati Riska , Miswadi Miswadi , Rahmatdillah Rahmatdillah , Jhonnerie Romie , Nofrizal Nofrizal
Published: November 2024

Mangrove ecosystems in coastal regions provide vital ecological, protective, and socio-economic benefits. This study analyzes mangroves’ spatial distribution and density changes in the North Rupat Regional Marine Reserve Conservation Area (KKPD), Riau, Indonesia, over 34 years (1989-2023). The research utilized Landsat satellite imagery with Random Forest classification methods and applied Normalized Difference Vegetation Index (NDVI) calculations to categorize mangrove canopy density. An innovative mathematical approach assessed changes in mangrove distribution and density. Results show a decrease in mangrove area from 10,822.84 hectares in 1989 to 10,613.38 hectares in 2023. Canopy density analysis reveals dominance of stable low-density areas (4,311.27 hectares) and significant degradation (3,651.57 hectares). NDVI analysis demonstrates a drastic degradation in mangrove quality, with mean NDVI values dropping from 0.309873 in 1989 to -0.03113 in 2023, indicating severe vegetation stress. Complex change patterns and succession followed by degradation indicate mangrove ecosystem dynamics influenced by natural and anthropogenic factors. This research highlights the importance of targeted conservation strategies and long-term monitoring for sustainable mangrove management in the North Rupat KKPD.
Immune response of saline tilapia (Oreochromis niloticus) to feed enriched with probiotic Bacillus amyloliquefaciens at high salinity
Authors: R Rahmi , Indahyani Fitri , A Akmal , Dwinhoven Ifhan , Mundayana Yuani , Syaichudin Muhammad , Suryanto S Hidayat , Insana S Nur , Nisaa Khairun
Published: November 2024

Tilapia is a widely favoured fish due to its substantial meat content and appealing taste. The incorporation of probiotics in tilapia farming can enhance the fish’s immunity against diseases. Additionally, probiotics can increase the total protein content of the feed and maintain the balance of digestive microbes. This study aimed to investigate the immune response of saline tilapia fed a diet enriched with the probiotic B. amyloliquefaciens at a salinity level of 10 ppt. The research focused on various blood parameters in tilapia, including total erythrocytes, leukocytes, and hematocrit levels, as well as the food conversion ratio (FCR) and specific growth rate (SGR). The rearing method involved maintaining approximately 100 g of tilapia fry for 45 days, with four treatments and three replications. The treatments included a control without B. amyloliquefaciens and additions of the probiotic at concentrations of 103, 105, 106, and 107 CFU/mL. The study results indicated no statistically significant differences (P>0.05) in FCR values (1.16–1.24) and SGR (2.03–2.24% BW/day). However, the addition of B. amyloliquefaciens at a concentration of 107 CFU/mL led to an increase in erythrocyte count and hematocrit levels during the study period, with no observed effect on leukocyte count in saline tilapia reared at high salinity.
Assessment of the utilization status of fourfinger threadfin (Eleutheronema tetradactylum) in the waters of Dumai City, Riau Province
Authors: Pradini Ulfa Rizki , Feliatra Feli , Effendi Irwan , Warningsih Trisla
Published: November 2024

One of the local fish species exploited in the waters of Dumai is fourfinger threadfin (Eleutheronema tetradactylum). The purpose of this research is to analyze the maximum sustainable yield, optimal efforts, and utilization levels of fourfinger threadfin. Data on catches and efforts were collected from the annual reports of the Department of Fisheries Dumai City over a period of ten years. The results of the analysis using the Walter-Hilborn model indicate that the maximum sustainable yield of fourfinger threadfin is 234 ton year-1, and the optimal effort (Eopt) is 404 unit year-1. The average utilization rate of fourfinger threadfin from 2014 to 2023 is 28 percent. The resource is currently moderately exploited (25-75%), indicating that the stock has been harvested close to its maximum sustainable yield value. It is advisable to increase fishing efforts without compromising the sustainability of fourfinger threadfin in the waters of Dumai City.
Increasing The Economic Value of Coconut Milk Factory Waste In Malaysia
Authors: Widodo Aris Slamet , Widodo  , Syamsia  , Qomariah Puji , Hashim Muhammad bin , Ulum Barhul
Published: November 2024

Coconut dregs are a by-product of coconut processing into coconut milk. Coconut dregs contain protein, fat and crude fiber so that they can be used as products with high economic value. One way is to process it into flour that can substitute the use of wheat in making various foods. This community service activity aims to provide education to coconut milk processing groups in utilizing coconut dregs into flour and processing it into high-fiber foods that have economic value such as coconut flour cakes. This activity uses the methods of socialization, training, and mentoring to the Kampung Parit Baru Malaysia coconut milk production group for three months from March to May 2024. The results of this activity provide knowledge and skills to partners about the potential use of coconut dregs as flour, how to make flour and process it into cakes that contain high fiber. The level of satisfaction and assessment of community service activities through the utilization of coconut dregs waste for making flour in the Kampung Parit Baru Malaysia coconut milk production group is in the very satisfactory category.
Strengthening Production with Liquid Organic Nano Fertilizer Technology in Ornamental Plant Business in the Sekar Sempol Farmer Group
Authors: Sutrisno  , Mulyono  , Wibowo Sigit , Rozaki Zuhud
Published: November 2024

The ornamental plant business is increasing due to the high demand of this plant. This program solves production of ornamental plant problems. Sekar Sempol Farmer Group is one the who produce the ornamental plant. The production problems that were resolved were poor growth and performance of ornamental plants and damaged greenhouses because they were made of bamboo. Production problems were resolved by training and treatment in liquid nano organic fertilization technology to produce good ornamental plant performance. Increasing the production of ornamental plants is also carried out by changes the greenhouse. The output of this program is improving the skills of ornamental plant farmers in using liquid organic nano fertilizer to improve ornamental plant production. Experimental research for using nano organic fertilizer supporting to better ornamental plant performance. A modern and stronger greenhouse made of galvalume material to be standardizer greenhouse make more conducive microclimate to ornamental plant growth.
Enhancing Engine Performance and Environmental Sustainability Through Innovative Exhaust Design
Authors: Anggoro Sotya , Nurisna Zuhri , Safitri Meilia
Published: November 2024

This research investigates and demonstrates the potential benefits of material innovation and exhaust design in enhancing vehicle performance and being more environmentally friendly. The pursuit of optimal vehicle efficiency has driven the exploration of alternative materials. Galvanized materials have emerged as a significant factor, highlighting the potential for increased agility and fuel efficiency. With this material, the new exhaust design results in an extraordinary weight reduction of 3.2 kg compared to the original exhaust at 6.450 kg. Additionally, the new exhaust design has yielded significant improvements in performance metrics. The peak power output of the original exhaust is 12.4 HP at 7336 RPM, increasing to 13.3 HP at 7695 RPM, showing a power increase of 7%. The maximum torque of the original exhaust is 12.99 N.m at 6186 RPM, increasing to 13.81 N.m at 5501 RPM, showing a torque increase of 6%. The power-to-weight ratio calculation shows a substantial shift in efficiency, with the original exhaust having a value of 0.09 HP/Kg and the new, more efficient exhaust having 0.10 HP/Kg, an efficiency increase of 11%. Furthermore, the noise produced by the original exhaust at a maximum of 8000 RPM is 90.2 dB, while the new exhaust at a maximum of 8000 RPM is 88 dB. From these results, it can be concluded that the new exhaust design enhances motorcycle efficiency and is more environmentally friendly.
Increasing Student Productivity and Learning Motivation through Training and Implementing MIT App Inventor Software at SMP 7 Muhammadiyah of Yogyakarta
Authors: Muzamil Sanupal , Loniza Erika , Apriyanto Noor Pratama , Maryanto Irvan Eko Kris , Yudhanto Ferriawan
Published: November 2024

At SMP Muhammadiyah 7 Yogyakarta, Information and Communication Technology (ICT) classes have been implemented for a long time, but the motivation and productivity of ICT students still needs to be improved because the school is still focused on understanding and practicing using ICT media. Therefore, MIT App Inventor software design training to control robot movement (arm- robot) was carried out to increase motivation and learning productivity for students at SMP Muhammadiyah 7 Yogyakarta. This training is carried out face to face directly to students in the classroom. Students are divided into 7 groups, where each group consists of 7 students. Each group had several laptops and was given the MIT App Inventor software design module to access the application, start designing, create a layout, create block coding, integrate the MIT App Inventor program into Android and connect Android as a face-to-face controller to move the Arm-robot. In this training, students succeeded in enthusiastically creating software from the general introduction to design stage, creating layouts and coding blocks to being able to connect and control the arm- robot. Apart from being able to improve ICT skills, this training is also able to boost students’ enthusiasm and productivity in learning.
Implementation of Power Assist Wheelchair Technology at Elderly Integrated Health Posts
Authors: Nurisna Zuhri , Anggoro Sotya , Rizqiea Noerma Shovie
Published: November 2024

The increasing elderly population presents significant mobility and quality of life challenges. This study aims to develop an electric wheelchair specifically designed to meet the needs of the elderly, focusing on comfort, safety, and independence. The developed electric wheelchair features a suspension system that provides a comfortable and secure ride by absorbing shocks and vibrations on uneven surfaces. Testing results indicate a significant improvement in the independence and mobility of elderly users and reduced injury risks from falls or collisions. The suspension system has proven effective in enhancing user comfort, reducing fatigue, and providing a smoother and safer riding experience. This study concludes that an electric wheelchair designed with the specific needs of the elderly in mind, including innovative suspension features, can significantly improve their quality of life.
Enhancing Knowledge and Skills in Identifying the Transition from Primary to Permanent teeth: A Preventive Measure Against Tooth Crowding
Authors: Utari Tita Ratya , Lydianna Trianita , Puspita Sartika , Mahardika Cristina , Syavira Nevlein
Published: November 2024

Knowledge about the transition process from primary teeth to permanent teeth is crucial. Parents are expected to know when deciduous teeth will erupt, will fall out, and when permanent teeth will grow to replace primary teeth. In this way, permanent teeth will grow in the right place, thereby preventing crowding of teeth, which will become difficult to clean, causing cavities and gum damage. This community service activity aimed to increase knowledge by providing education and skills in detecting the process of changing primary to permanent teeth. The method used was promotive and preventive efforts through outreach to the community. Forty- two teenagers and young parents in Botokan Hamlet, attended educational activities using PowerPoint presentations accompanied by interesting pictures and videos. Before and after activity, participants worked on ten pre and post-test questions. To make it easier for the public to remember the material presented, leaflets and pocketbooks were distributed regarding the process of changing primary teeth to permanent teeth. The t-test results revealed significant differences, which means that this activity effectively increased knowledge and skills. Parents’ knowledge and their ability to monitor the teeth transition process will provide enormous benefits for their children’s dental health, thereby preventing unexpected tooth decay.
Detection of Dental and Oral Diseases Using the Oral Hygiene Index-Simplefied (OHI-S) to Enhance Public Health
Authors: Febria Nyka Dwi , Femilian Afryla , Arinawati Dian Yosi , Ranum Sari Multia , Azizah Nurul
Published: November 2024

The dental community widely recognizes that the buildup of dental plaque on teeth can lead to gingivitis, which may advance to chronic periodontitis in some instances. It is imperative to address plaque accumulation early through early detection and prevention of dental and oral issues. Regrettably, routine dental check-ups and good dental hygiene are frequently neglected by the general populace. The main purpose of the examination is to increase public awareness of the importance of dental health, provide the knowledge and skills necessary to maintain dental health, and facilitate access to high-quality dental care. Dental and oral hygiene examination was conducted on 18 people using the OHI-S (Oral Hygiene Index-Simplified) method, which revealed that a large number of them had OHI-S scores in the moderate range, indicating the need for the community to prioritize the promotion, prevention, and rehabilitation of dental health. The follow-up actions taken were to provide dental health education and referrals for dental care.
Improvement of Knowledge in Reproductive Organ Cancer Prevention and Anticancer Herbal Compounding in Ambarketawang
Authors: Astuti Yoni , Joko Priambodo Wahyu , Indrayanti Indrayanti
Published: November 2024

Cervical cancer and breast cancer are cancers of the female reproductive organs. The aim of the study was to improve the knowledge of participants in preventing exposure to female reproductive cancer and herbs high in antioxidants as well as enhancing the skills of combining or choosing anti-cancer herbs. The method used is lectures and discussions. Analysis using pre-post-test and correlation tests. The result of this study is there’s a 17.38% increase in decay and ability to select anti-cancer herbal ingredients. However, differences in education and age do not indicate any relationship. In conclusion, lectures and discussions on cancer, herbs and combination training of herbs can enhance the knowledge and skills of participants. Age and level of education have no influence on efforts to improve knowledge. The future research needs to test the daily beverages to the participants and their family.
Improving the Knowledge of Elderly Cadres in Providing Adequate Phytoestrogen Intake to Reduce the Progression of Osteoporosis
Authors: Astuti Yoni
Published: November 2024

Aging is an inevitable physiological process in life. In women, the aging process will be greatly affected by decreased production of the estrogen hormone so that the metabolism mediated will also experience higher disturbances than in men. Osteoporosis in women is much faster, so to cope with it can be slowed down with a rich intake of phytohormone estrogen. Several studies have proven that many plants have phytoestrogenic properties around us but not many people know about it. The aim of this study is to raise public awareness of bone health through the preparation skills of phytoestrogen-rich food intake. The methods used were lectures, discussions, demonstrations. The results showed an improvement in understanding and skills of 0.6 points. The Conclusion, lecturing and discussion were able to raise awareness despite still very low. However, there is great hope that this knowledge will be passed on through practice to make use of the plant resources available in the surroundings. The future study should modify the method to treat the elderly respondent, also need more time to understand the knowledge better.
Plastic Waste Pyrolysis Reactors with Integration of Rocket Stove and Advanced Heat Transfer System: An Analysis of its Design
Authors: Wisnujati Andika , Rachmawati Putri , Maarif Syamsul , Althaaf Andika Daffa , Farizan Munajat Nur
Published: November 2024

The development of efficient and sustainable pyrolysis reactors is critical for advancing bioenergy technologies and waste management. This study presents the design and stress analysis of a pyrolysis reactor incorporating a rocket stove and an advanced heat transfer system, using Autodesk Inventor 2016. The integration of a rocket stove ensures efficient combustion and high-temperature stability, while the advanced heat transfer system maximizes thermal distribution within the reactor, enhancing the pyrolysis process. Stress analysis revealed critical stress points and informed design optimizations to ensure durability and safety. This innovative design approach, validated through advanced simulation tools, offers a significant advancement in the development of sustainable and efficient pyrolysis reactors. The safety factor is defined as the ratio of maximum allowable stress to equivalent stress. The permissible stress value for stainless steel components used in pyrolysis tubes is 187.5 MPa. The stress analysis test revealed that the reactor tube experienced a maximum equivalent stress of 17.72 MPa. The reactor’s design, incorporating materials capable of withstanding high temperatures and stresses, ensures safe and reliable operation. Stress analysis and the implementation of appropriate safety factors play a critical role in maintaining the reactor’s structural integrity.
Comparison Study of Water Quality and Organoleptic Analysis of Catfish (Clarias sp.) From Conventional Pond and Aquaponic Systems
Authors: Yudhanto Ferriawan , Anugrah Rinasa Agistya , Triwijayani Ade Utari , Ogah Ogah Anselm , Omar Mamdouh Ahmed
Published: November 2024

Catfish is one of the most popular in Indonesia because it is easy to maintain. Catfish can be cultured in ponds or together with plants, known as an aquaponic system. This study aimed to compare water quality and the quality of catfish cultured using conventional systems in concrete ponds and an aquaponic systems in plastic fiber ponds. This study has the results of water quality testing showing a difference in the ammonia value of 3 ppm in concrete pond using conventional system and 0.5 ppm in plastic fiber ponds using an aquaponic system. Meanwhile, the results of organoleptic test show that catfish cultured using an aquaponic system provide higher value comparison to the conventional system. Catfish cultured with an aquaponic system is better than conventional systems in ponds.
Design of Waste Management and Accounting Information System (SITAMPAH 35) Based on Android at BERSERI 35 Waste Bank
Authors: Susilawati Desi , Kusumastuti Wardana Linda , Dewi Wulaningrum Puspita , Subagyo Untung , Umayra Hafizah , Sri Wahyuni Heni
Published: November 2024

One of the achievements of the Sustainable Development Goals (SDG’s) is Sustainable Consumption, which means managing waste residu from consumption. Waste management that is less than optimal will result in environmental, pollution, and poor public health. Therefore, strategic efforts are needed to empower sustainable waste management to reduce the volume of waste with awareness of applying the 5M concept, namely reducing, sorting, utilizing, recycling, and saving waste; increasing the role of the waste bank;and focusing on the nature of self-reliance. Berseri 35 carries out weighing and waste management administration activities without using an integrated information system which is manual. Customer members are not yet able to obtain information regarding the amount of savings in real time. In addition, the Waste Bank Management has difficulty reporting the amount of organic and inorganic waste management Environmental Department every month. Nowadays is technology era to facilitate access requires a Technology System and Waste Social Capital. The right technology system requires knowledge transfer and technology transfer as social capital engineering such of waste literacy knowledge. The aims of this program is creating an Integrated Information System application for managing organic and inorganic waste (My Waste For Berseri SITampah 35 to provide waste reports in a timely manner. Waste bank administrators can report the amount of managed waste in a timely and accurately. Strengthening the Waste Bank Institution in order to increase human resource skills for sustainable waste management. This research findings is an application of the accounting information system of for waste management digitally that will support financial recording that closure is more effective and efficient namely SITAMPAH 35.
Application of Biopori Technology for Sustainable Management of Household Organic Waste
Authors: Rahayu Lestari , Kamardiani Diah Rina , Nurusman Arief Abdillah
Published: November 2024

Management of household organic waste is very important, especially in urban areas, because improper disposal causes the environment to become unhealthy. This research aims to determine the adoption and application of bio pore technology for sustainable organic waste management in Sleman Regency, Yogyakarta. The method used is descriptive quantitative using survey techniques, participatory action research (PAR), and focus group discussions (FGD) to determine public perceptions and the effectiveness of technology. The analysis was carried out descriptively using indicators of relative advantage, compatibility, complexity, trialability, and observability of biopori technology. The research results using the Wilcoxon-Rank test analysis showed a significant difference in Knowledge, Attitudes, and Practices (KAP) scores before and after training. The public assesses waste processing using bio-Pori technology based on relative advantage, compatibility, complexity, trialability, and observability very good. Biopori technology is compatible with previous technologies, easy to learn, accepted, applied, and successfully tested. The application of Biopori technology improves soil quality , reduces organic waste, and provides benefits to society both from an economic and technical perspective. The research results have implications for the acceptance and feasibility of bio-Pori technology as a sustainable solution for managing household organic waste of household
Empowering the community through plastic waste management and eco-friendly construction materials in Bangunjiwo Village
Authors: Zaki Ahmad , Yadi Seplika , Mahbubi Khairil , Wira Nindhita Kharisma , Fauzi Amir
Published: November 2024

This study addresses the critical issue of plastic waste management in Bangunjiwo Village, Yogyakarta. With Indonesia generating 22.92 million tons of waste in 2023, and plastic waste constituting 19% of this total, effective management solutions are essential. The program involved socialization through Focus Group Discussions (FGD) and evaluation using questionnaires. The FGD sessions educated 23 community leaders on waste management technologies and the potential use of plastic waste in eco-friendly construction materials. Evaluation results showed that over 57% of participants had a strong understanding and awareness of the negative impacts of plastic waste and the importance of the 3Rs (Reduce, Reuse, Recycle). Additionally, more than 52% strongly agreed on the importance of recycling and innovative plastic waste processing. The high willingness to participate in waste reduction and management initiatives highlights significant potential for implementing plastic waste recycling programs in the village. Continuous education and the provision of appropriate processing technologies can transform plastic waste into valuable, sustainable construction materials, supporting both environmental conservation and local infrastructure development. This study underscores the crucial role of community participation and ongoing education in achieving effective plastic waste management.
Transmutation detectors for fast neutron fluence measurements
Authors: Krechlerová Alena , Viererbl Ladislav , Lorinčík Jan , Elantyev Ivan , Assmann Vratislavská Hana , Klupák Vít , Harut David
Published: November 2024

Transmutation detectors (TMDs) are based on a similar principle as neutron activation detectors (NADs). In both cases, the neutron fluence is estimated from the number of reactions in the detectors. The main differences between these two detectors are the type of product created by the nuclear reaction and the evaluation of the irradiated detectors. In TMD, the transmuted nuclide is stable, and the number of reactions is gained by analytical methods suitable for measuring low concentrations. In NAD, the nuclear reaction leads to the production of radionuclides and the number of reactions is evaluated from the activity measured by radiometric instruments. While TMDs for thermal neutrons can be easily prepared and evaluated due to their high thermal neutron cross sections for isotopes such as 10B, 115In or 197Au, the requirements for fast neutron TMDs are higher. Cross sections for nuclear reactions suitable for the TMD method with fast neutrons are in the range of 1 to 100 mb for the fission spectrum. This leads to concentrations from 0.01 ppm to 1 ppm for fast neutron fluence of 1E19 cm-2. These low concentrations imply requirements for detector material purity and sensitivity of concentration evaluation equipment. Materials for fast neutron TMDs were proposed, where the relevant parameters, such as energy threshold and minimal detectable fluence are known and convenient. An experimental comparison of some TMD and NAD responses was made in the LVR-15 research reactor using secondary ion mass spectrometry to evaluate the concentration of TMDs.
On the effect of the core boundary power distribution on the radiation situation in reactor components
Authors: Košťál Michal , Klupák Vít , Matěj Zdeněk , Mravec Filip , Cvachovec František , Rypar Vojtěch , Losa Evžen , Harut David , Schulc Martin , Jánský Bohumil , Novák Evžen , Czakoj Tomáš , Krechlerova Alena , Juříček Vlastimil , Zaritskyi Sergey
Published: November 2024

The assessment of the neutron flux distribution in nuclear power plant components, like reactor internals and the pressure vessel, is one of the most important parts of their residual lifetime evaluation process because the irradiation damage of these components is strongly dependent on it. The fast neutron fluences in power reactors are generally determined using calculations and verified by measurements. Discrepancies between them sometimes occur, which can be caused by be the inaccuracies in the power distribution used in neutron transport calculations. This paper quantifies the effect of uncertainty in power density on the neutron fluences behind the reactor pressure vessel (RPV). An increase in power density was experimentally simulated by implementing a higher uranium enrichment of certain selected pins. The experiment was also simulated using the MCNP code with the ENDF/B-VII.1 library. Both the experimental and calculational data show a significant local increase in neutron flux. Even behind the RPV, the increase is as high as 25%, while the local power increase in the perturbed pins is about 70–80%, which is approximately equal to the 2 σ power density uncertainties. A good agreement between measurement and calculation was found.
Molten Salt Research Reactor (MSRR) shielding analysis using SCALE/MAVRIC sequence with continuous energy and multigroup cross sections
Authors: Petrovic Bojan , Hirji Rakim , Carberry Kyle
Published: November 2024

It is necessary to verify (and validate when experimental data are available) shielding codes and methodologies for Molten Salt Reactors (MSRs). This paper examines the impact of using a fine and coarse multigroup cross section library vs. the reference continuous energy data. Molten Salt Research Reactor (MSRR) being developed by the NEXT Research Alliance (NEXTRA) is used as a testbed. Shielding analyses are performed in support of MSRR development using the MAVRIC sequence of the SCALE 6.2.4 code package. The sequence uses deterministic forward and adjoint radiation transport calculations with FW-CADIS methodology to generate variance reduction parameters that are used by MONACO, a fixed source Monte Carlo code. Originally, MONACO was developed as a multigroup code, and a 200-group and 27-group neutron shielding-focused libraries were provided as part of the package. While the 200-group library provides adequate accuracy for many applications, it is highly desirable to confirm this for any specific analysis. In SCALE 6.2, continuous energy capability was implemented in MONACO, thus enabling direct and consistent evaluation and quantification of the impact of using a multigroup rather than the reference continuous energy library. This paper examines the impact of multigroup approximation on main radiation environment parameters in MSRR shielding analysis, including the fast flux and dpa.
Secondary source reconfiguration for a Westinghouse four-loop plant
Authors: Amiri Benjamin , Chen Jianwei
Published: November 2024

An approach is described for estimating the excore source range detector count rate for several secondary neutron source configurations. A case in which a Westinghouse four-loop plant considered relocating the secondary source fuel assemblies and switching from secondary source fuel assemblies with six secondary source rods to assemblies with two or four secondary source rods is presented. The excore detector count rate is first estimated computationally, by modeling the secondary source fuel assemblies and excore detectors in MCNP and predicting the detector count rate based on detector sensitivity in cps/nv listed in the detector manual. Since the excore detector response can vary greatly from cycle to cycle even for equilibrium loading patterns due to variations in detector response, benchmarking to actual excore source range detector count rates is presented. A correction factor for each individual source range detector is determined from the benchmark, then applied in the prediction of excore source range detector count rate for the proposed two or four secondary source rod configurations. The approach presented in this paper could also be used to perform an engineering evaluation on the feasibility of elimination of secondary sources.
Development and testing of WEASEL for least-squares neutron spectrum adjustment
Authors: Fischer Greg
Published: November 2024

A new least-squares adjustment program called WEASEL has been developed. WEASEL is implemented in Python and uses standard ASCII interfaces for user input and output, and HDF5 interfaces for cross section, covariance data, and weighting function data. WEASEL allows the user to supply a trial neutron spectrum in an arbitrary group structure. The trial neutron spectrum is re-binned into a group structure consistent with the covariance data using a weighting function that can either be read from the data library or supplied as input by the user. WEASEL performs least-squares adjustments of a single irradiation environment. The adjusted neutron spectrum, covariance matrices, and other derived quantities can then be plotted and interrogated with standard software packages.
Measurements of 235U(nth,f) Spectrum Averaged Cross Sections (SACS) in zero power reactors
Authors: Košťál Michal , Losa Evžen , Czakoj Tomáš , Bílý Tomáš , Schulc Martin , Juříček Vlastimil , Šimon Jan , Mareček Martin , Uhlíř Jan , Krechlerová Alena , Simakov Stanislav , Trkov Andrej , Capote Roberto
Published: November 2024

This paper deals with the measurement of Spectrum Averaged Cross Sections in two different neutron fields formed in zero power reactors. The first was Benchmark Neutron Reference Field in the LR-0 reactor, and the second field was in the center of the vertical channel touching the fuel in the VR-1 reactor. The spectrum averaged cross section differs for both cases as the spectra differ, but after normalization to 235U PFNS using calculated correction, both results are in good agreement, thus confirming the spectra in both cases are similar in the 1 – 14 MeV region. A good agreement between lower threshold reactions averaged in actual reactor spectra and prompt fission neutron spectrum of 235U is reported as well.
Comparison of transport cross-section data generated with BONAMI and TRANSX
Authors: Fischer Greg
Published: November 2024

This work compares the results of radiation transport calculations performed with VITAMIN-B7 cross section data to calculations performed with a similar library prepared with the TRANSX code. The bases for the comparisons include a simplified, one-dimensional PWR model and the industry standard H.B. Robinson Cycle 9 reactor dosimetry benchmark. Comparisons are also made with a modified TRANSX-generated library with enhanced background cross section data. The results show significant differences between VITAMIN and TRANSX-generated libraries through iron media.
A neutron fluence map of the Los Alamos National Laboratory Godiva IV critical assembly
Authors: Roebuck Jesse M. , Redhouse Danielle R. , Goda Joetta M. , Moreno Melissa , Peters Curtis
Published: November 2024

A neutron fluence map and a total ionizing dose map of the Los Alamos National Laboratory Godiva IV fast burst critical assembly was generated using passive reactor dosimetry, comprised of sulfur pellets and thermoluminescent dosimeters. Godiva IV is an unmoderated, fast burst, critical assembly constructed of approximately 65 kg of highly enriched uranium fuel alloyed with 1.5 % molybdenum for strength. [1] The mapping was performed during a single 75.6 ºC temperature rise burst operation, with the top and sides of the cylindrical Godiva-IV Top Hat covered in passive dosimetry. Dosimetry was placed in a symmetric pattern around the Top Hat, with higher concentrations near the control rods and burst rod. A specific portion of the lower quadrant of the burst rod was mapped to confirm a testing region where the neutron fluence varied by no more than ± 5%. The results will be used to assess the neutron, gamma, and total ionizing dose environment in three-dimensional space around the assembly for higher fidelity experiment placement, active dosimetry positioning, and radiation field characterization.
Godiva IV central cavity neutron environment characterization with threshold neutron detectors
Authors: Whitman Nicholas , Pierson Bruce , Weldon Robert , Cutler Theresa , Gooden Matthew , Hutchinson Jesson , Sanchez Rene , Grove Travis , Goda Joetta
Published: November 2024

Godiva IV is a cylindrical fast burst reactor comprised of approximately 65 kg of highly enriched uranium that is operated by Los Alamos National Laboratory and sited at the National Criticality Experiments Research Center at the Nevada National Security Site in Nevada in the United States. Godiva IV is typically operated at delayed critical and in the regime spanning from sub-prompt to super-prompt bursts. Godiva IV is used for sample irradiations, criticality safety demonstrations, dosimetry studies, and for studying super-prompt behavior. In preparation for both an upcoming experiment to reduce uncertainties in the prompt fission spectrum for 235U using threshold neutron detectors, and for future research using Godiva IV, it was desired to exercise the process of the selection of threshold neutron detectors/activation foils, radiation metrology, and the subsequent adjustment of the neutron spectrum. For this exercise, nine high purity threshold neutron detectors/activation foils were irradiated in a Godiva IV burst. The foils were then analyzed using a high-purity germanium detector in the NCERC counting laboratory to determine end of irradiation specific activities for available IRDFF-II reactions. This work summarizes the Godiva IV foil irradiation, radiation metrology results, and adjusted neutron spectrum. The results of this exercise ultimately characterized the neutron environment inside the sample irradiation cavity inside Godiva IV to a higher degree than previously performed, informed decisions for the upcoming larger scale experiment, and will inform future neutron spectrum characterizations at NCERC.
Green metal matrix composites: a multi-faceted study on Al alloy composites with egg shell powder and silicon carbide as reinforcements
Authors: Hatti Gururaj , Naveen Gangarekaluve J. , Koti Vishwanath , Uppin Vinayak S. , Lingaraju Sannananjapla Vageshappa , Janamatti Santosh , Hokrani Vishwanath V. , Pujar Shivanand N.
Published: November 2024

This article is about Green Metal Matrix Composites (GMMCs) produced with aluminum alloys and reinforcements include silicon carbide and eggshell powder. The GMMCs offer a new approach to sustainable materials through the use of ecofriendly reinforcements. A novel class of composites results from a combination of silicon carbide, which has superior mechanical properties, and agricultural waste based eggshell powder. Furthermore, eggshell powder mainly comprised of calcium carbonate lowers its density as well as serves as long-term reinforcement. Silicon carbide enhances their mechanical properties in terms of strength and hardness respectively. This report involves a systematic study using mechanical testing and scanning electron microscopy to explain microstructural evolution and evaluate performance during mechanical loading. Further, wear resistance gives indications on suitability for different industrial applications. Variations in reinforcement contents were done so as to include 3–12% silicon carbide, and 2–8% eggshell powders in the aluminum alloys. Production strictly adhered to guidelines that controlled some variables such as stirring speed and duration which was aimed at achieving exact control. These cast composites were subjected to wear tests, tensile tests, and hardness tests as well as microstructural analysis. EDS-SEM results demonstrate successful incorporation of the reinforcements into the hybrid composites. Unveiling a surprising evenness of distribution of reinforcements throughout the Aluminum matrix through Microstructural examination is amazing. Unique wear behavior trends are presented here. The matrix alloys show mainly adhesive wear while the composites display abrasive wear mediated by reinforcements. This research proposes an eco-friendly method for metal matrix composites, thus advancing sustainable materials and offering hope for strong yet lightweight green materials suitable for aerospace, automotive and other engineering sectors.