bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulation research on large capacity power supply technology suitable for distribution transformer short-circuit withstand capability test
Authors: Gu LingYun , Wu Yan , Yin Hui , Chen Jie , Zhou FeiYan , Bai XueFeng , Bai ZhiXin 
Published: December 2022

Abstract
The existing transformer short-circuit test equipment and technology have several limitations. The purpose of short-circuit test is to simulate the test of high-voltage equipment under the short-circuit fault condition of the power system, usually, a large capacity test such as transformer burst short-circuit test, circuit breaker dynamic heat stability test, to verify the reliability and stability of related equipment under extreme working conditions. At present, the large capacity test generally uses methods of power grid dedicated line power supply and short-circuit testing alternator group. However, these two methods have difficulties in construction approval, high investment costs, complex site requirements, a large impact on the power grid, and low control accuracy. Theoretical studies on equivalent simulation verification method of short-circuit withstand capability test of distribution transformer demonstrated the feasibility of using modern power electronics and advanced energy storage technology to replace conventional power grid dedicated line power supply, short-circuit testing alternator and other short-circuit impact test equipment. It could complete the transformer short-circuit impact test specified by (IEC60076-5) with lower cost and higher efficiency, verify the short-circuit impact resistance of the transformer, and improve the test capacity.
Application research of large-screen visualization technology based on improved k-means in power grid system
Authors: Shi Jinping , Wan Xiang , Gou Yi , Huang Yuan , Fan Yana , Huang Xing 
Published: December 2022

Abstract
With the advent of the era of smart power, the scale of power systems continues to expand, and a large amount of data generated during power operation cannot be analyzed and shared on time. Aiming at this problem, this paper proposes an improved K-means clustering algorithm, and it performs cluster analysis on a large amount of data generated by the power grid. And a large-screen visualization real-time monitoring platform has been established, and the real-time operating status of the distribution network can be obtained through the cluster analysis of a large amount of data. The results show that the improved K-means algorithm in this paper has a better clustering effect. The real-time large screen visual monitoring platform can effectively monitor, warn and control the running state of the power grid. The visualization technology effectively improves the efficiency of real-time monitoring and safety control of the power system.
A fellow-following-principle based group model and its application to fish school analysis
Authors: Zhou Ziye , Liu Jincun , Pan Jie , Wang Jian , Yu Junzhi 
Published: December 2022

Abstract
Group models based on simple rules are viewed as a bridge to clarifying animal group movements. The more similar a model to real-world observations, the closer it is to the essence of such movements. Inspired by the fish school, this study suggests a principle called fellow-following for group movements. More specifically, a simple-rules-based model was proposed and extended into a set of concrete rules, and two- and three-dimensional group models were established. The model results are intuitively similar to the fish school, and when the group size increases, the milling phase of both the model and fish school tends from unstable to stable. Further, we proposed a novel order parameter and a similarity measurement framework for group structures. The proposed model indicates the intuition similarity, consistency of dynamic characteristics, and static structure similarity with fish schools, which suggests that the principle of fellow-following may reveal the essence of fish school movements. Our work suggests a different approach for the self-organized formation of a swarm robotic system based on local information.
The costs of Arctic infrastructure damages due to permafrost degradation
Authors: Streletskiy Dmitry A , Clemens Sonia , Lanckman Jean-Pierre , Shiklomanov Nikolay I 
Published: December 2022

Abstract
Climate change has adverse impacts on Arctic natural ecosystems and threatens northern communities by disrupting subsistence practices, limiting accessibility, and putting built infrastructure at risk. In this paper, we analyze spatial patterns of permafrost degradation and associated risks to built infrastructure due to loss of bearing capacity and thaw subsidence in permafrost regions of the Arctic. Using a subset of three Coupled Model Intercomparison Project 6 models under SSP245 and 585 scenarios we estimated changes in permafrost bearing capacity and ground subsidence between two reference decades: 2015–2024 and 2055–2064. Using publicly available infrastructure databases we identified roads, railways, airport runways, and buildings at risk of permafrost degradation and estimated country-specific costs associated with damage to infrastructure. The results show that under the SSP245 scenario 29% of roads, 23% of railroads, and 11% of buildings will be affected by permafrost degradation, costing $182 billion to the Arctic states by mid-century. Under the SSP585 scenario, 44% of roads, 34% of railroads, and 17% of buildings will be affected with estimated cost of $276 billion, with airport runways adding an additional $0.5 billion. Russia is expected to have the highest burden of costs, ranging from $115 to $169 billion depending on the scenario. Limiting global greenhouse gas emissions has the potential to significantly decrease the costs of projected damages in Arctic countries, especially in Russia. The approach presented in this study underscores the substantial impacts of climate change on infrastructure and can assist to develop adaptation and mitigation strategies in Arctic states.
The diversity of the Polypodiaceae in University green space
Authors: Susilowati A , Ginting I M , Rachmat H H , Elfiati D , Sucipto T , Nadeak H 
Published: December 2022

Abstract
Polypodiaceae is one of the fern families by the highest number species and plays an important role in the ecosystem. The polypodiaceae family is also known for its pharmacological properties. The University of Sumatera Utara campus, as one of green spaces in Medan, has a various variety of plants from undergrowth to higher plants. However, no information on the diversity of Polypodiaceae epiphytic species on the USU campus has not been recorded. The aim of the research is to identify and evaluate the diversity of Polypodiaceae species on the USU campus. For those purpose an inventory method in all green spaces on the USU campus. Species identification was accomplished by morphological identification of founded epiphytes. The relative density and dominance values have been used to calculate species diversity (H'). The study revealed the presence of 6 (six) Polypodiaceae epiphytic species on the USU campus, namely Microsorum diversifolium, Microsorum pustulatum, Pyrrosia piloselloides, Phymatosorus scolopendria, Pyrrosia eleagnifolia and Pyrrosia lanceolate. The highest diversity index was found in Pyrossia piloselloides with an H' value of 0.345 and the lowest diversity was found in Microsorum pustulatum with an H' value of 0.001.
Evaluation on the growth pattern and biological conditions of Sembilang (Plotosus canius) in East Aceh
Authors: Samad A P A , Jamil M , Gustiana C , Anzitha S , Mahyuddin T , Baihaqi B 
Published: December 2022

AbstractSembilang (Plotosus canius) is a delicious and nutritious fish that belongs to the family of Plotosidae and has great demand in coastal communities. Therefore, this research aimed to examine the data on growth patterns, morphometric and meristic measurements, and feeding habits of sembilang in the East Aceh mangrove area. The data collection included growth patterns, fish and fin length, and body width, and then the meristic measurements were carried out by counting the number of fin rays. The results showed that the length and weight of the fish ranged from 22-43 cm and 86-296 gr, respectively. Furthermore, the correlation coefficient r is 0.986 and the regression equation is W = 0.024L2.410. Its main diet is shrimp, with an IP rate of 47%, and they also consume feeds such as worms, small fish, crabs, and pieces of leaves. In conclusion, the growth pattern of sembilang (Plotosus canius) in the East Aceh mangrove area was negative allometric.
Feed management and health condition of Sumatran Elephant (Elephas maximus sumatranus) in Conservation Response Unit (CRU), Tangkahan, Langkat, North Sumatra
Authors: Berliani K , Patana P , Azmi W 
Published: December 2022

Abstract
The present study investigates the feeding management and health condition of elephants through a descriptive and field observation approach by interviewing the mahouts and clinical workers in Tangkahan CRU, Langkat Regency, North Sumatra. The ex-situ conservation unit promoted two feeding strategies namely the natural or grazing activity in the forest and additional feed (food stocks) collected or purchased by the workers in the form of coconut fronds, elephant grasses, bananas, watermelons, and etc. In addition to the collected fruits or crops, the CRU workers also prepared concentrates or pudding made from a mixture of palatable crops including rice, sticky rice, green beans, sugars to increase the food supply for the elephants. The clinical workers in the form of Vesswic is a team of veterinarians, paramedics and administrative personnel who focus on animal health including the Sumatran elephants. The Tangkahan CRU was then proven to promote the welfare of elephants through a series of effective feeding and health management.
Identification of gastrointestinal endoparasites in sheep (Ovis sp.) at various ages in Arjuna Farm, North Sumatra
Authors: Napitupulu S M S , Tanjung M 
Published: December 2022

Abstract
Gastrointestinal endoparasite is an infection that causes a decrease in the productivity level of sheep so that it detriments to the farmers. The purpose of this study was to compare the type, the prevalence and the intensity of endoparasites in each age group. Samples were taken as many as 7 fresh feces from each group of lamb, virgin, and adult from a total of 21 sheeps. Fecal samples were examined and prepared using the E.P.M Mc Master Protocol while endoparasites were identified under microscopical examination. The results showed 5 species of gastrointestinal endoparasites, i.e Eimeria sp., Dicrocoelium sp., Haemonchus sp., Strongyloides sp., and Capillaria sp. Eimeria sp. showed a prevalence of 85.7% in commonly category and intensity of 2216.6 or super infection category. Haemonchus sp. had a prevalence of 85% (common), an intensity of 671.4 (very severe), and the Strongyloides sp. had a prevalence of 85% (common) and an intensity of 200 (very severe). The lambs were found to be infected by Eimeria sp. with a prevalence of 100% (common) and an intensity of 2871.4 (super infection). Haemonchus sp. had a prevalence of 100% (common) and an intensity of 1200 (super infection), Strongyloides sp. had a prevalence of 71% (usual) and an intensity of 860 (very severe) and the Dicrocoelium sp. had a prevalence of 14% (often) and an intensity of 400 (very severe). The adult sheeps were found to had Eimeria sp. with a prevalence of 100% (common) and an intensity of 371.4 (very severe). The Haemonchus sp. had a prevalence of 14% (often) and an intensity of 200 (very severe). Strongyloides sp. had a prevalence of 57% (frequent) and an intensity of 200 (very severe) and the Capillaria sp. had a prevalence of 14% (often) and an intensity of 100 (severe). The prevalence and intensity of endoparasites in sheeps at Arjuna Farm was classified as very high.
Optimization of green open space in Ambon City
Authors: Selanno F M , Sitanala M R , Santoso P , Arinah H 
Published: December 2022

Abstract
The increase in population in Ambon City has resulted in increased space requirements and impacts the conversion of green areas into built-up areas. This indirectly impacts the decline in environmental quality, marked by an increase in the concentration of greenhouse gas (GHG) emissions in the air. The Green Open Space (GOS) arrangement program involves efforts to reduce GHG emissions in Ambon City. However, in reality, the allocation of space to develop green open space in Ambon City still does not meet the 30% standard or is still lacking 737.8 ha. This study aims to obtain information about the arrangement of green open spaces in Ambon City. The interview method was conducted in a structured manner with a questionnaire. SWOT analysis was used to analyze internal factors and external factors. The results showed that the critical strategies in optimizing Ambon City's green open space were to improve the quality of green open space by planting plants that have high GHG emissions absorption potentials, such as Samanea saman, Pterocarpus indicus, and Acacia mangium. Conduct harmonization and socialization with other institutions such as the Ambon City Satpol PP and green open space users to increase the supervision of green open space. Using the basic green coefficient as the primary condition for obtaining a Building Permit (IMB). The present study recommended that future research on green open spaces in Ambon City should focus on other influencing elements including geography, climate, socio-culture, and so on.
Identification of ornamental plant species in the Martelu Purba Nature Reserve, North Sumatra
Authors: Rambey R , Permana J 
Published: December 2022

Abstract
Indonesia has a fairly high biodiversity, both flora and fauna. One of the biodiversity in Indonesia is various species of ornamental plants found in the wild. One of the locations that has a diversity of ornamental plant species is the Martelu Purba Nature Reserve. The purpose of this study was to identify the species of ornamental plants found in the Martelu Purba Nature Reserve. The method used in this research is the roaming method, namely by exploring the Martelu Purba nature reserve and then noting the species of plants that have the potential to be ornamental. The results obtained indicate that there are 19 species of ornamental plants at that location. The species of ornamental plants include the family Araceae, Orchidaceae and species of ferns. There are plants that live Epiphyte and several other species grow terrestrially.
Effect of gamma iradiated seeds of Jabon Merah (Neolamarckia macrophylla (Wall.) Bosser) to genetic diversity
Authors: Larekeng S H , Qalbi N , Rachmat A , Iswanto I , Restu M 
Published: December 2022

Abstract
Jabon merah (Neolamarckia macrophylla (Wall.) as one of the potential industrial forest plantations to meet the need for wood that has a moderate level of genetic diversity. This study aims to analyze the morphological and genetic characters and analyze the stability of genes in explants from red jabon seeds induced by gamma rays at doses of 0 gray, 5 gray, 10 gray, 15 gray, 30 gray, 45 gray and 60 gray, 75 gray, 90 gray, 120 gray and 240 gray. The induced seeds were cultured in vitro. The subculture was started with an initialization on MS0 medium and repeatedly cultured. Finally, the LD50 value was determined using curve fit analysis, explant morphological analysis with SPSS, genetic analysis of explants using RAPD markers and SSR/Microsatellite. The DNA analysis with 9 SSR/Microsatellite and RAPD marker primers showed that most of the induction doses produced more fragments than the control.
Identification of Araceae in Pondok Buluh Training Forest, Simalungun Regency, North Sumatra Province
Authors: Manurung H , Hasibuan M , Rambey R 
Published: December 2022

Abstract
The Pondok Buluh Training Forest is located in Simalungun Regency, North Sumatra, which has a fairly high diversity of flora, one of which is a plant from the Araceae family. Araceae is a family of taro that has potential for ornamental plants, medicinal plants, food and animal feed, therefore it is important to conduct research on Araceae species in this location to determine the diversity and potential of Araceae. From the results of the research, it was found that there were 13 species of Araceae which were included in 6 genera, namely Aglaonema, Alocasia, Diffenbachia, Homalomena, Schismatoglottis and Syngonium. The species are Aglaonema crispum, Alocasia arifolia, Alocasia sp., Alocasia longiloba, Alocasia sanderiana, Alocasia scabriuscula, Dieffenbachia seguine, Diffenbachia amoena, Homalomena cordata schott, Homalomena pendula, Homalomena rubescens, Schismatoglottis calyptrata, and Syngonium podophyllum. The potential of Araceae plants is as a medicinal plant, ornamental plant, vegetable pesticide and animal feed.
Phylogenetic analysis of Shorea Genus in University of North Sumatra Campus, Indonesia, based on matK genes
Authors: Rangkuti A B , Irmayanti L , Harahap S S H 
Published: December 2022

Abstract
Shorea is one of the genera in the Dipterocarpacea family with a very large number of species. Shorea tree species have high economic and ecological value. Currently more than 100 species of Shorea are in the endangered category. Taxonomic aspects as well as information on biological characteristics are one of the important bases of species conservation or restoration activities. The University of North Sumatra campus is one of the green open spaces that can be used as an ex-situ conservation location. This study aims to determine the types of trees of the Shorea genus on the North Sumatra University campus and their kinship based on phylogenetic analysis. It is necessary to identify the Shorea species on the USU campus using the current taxonomic method using phylogeny analysis. Sequences of the identified Shorea species were collected from the NCBI (National Center for Biotechnology Information) web, then edited the data and constructed a phylogenetic tree using Meng X.1. In this study found 4 types of Shorea, namely Shorea parvifolia (Meranti Sarang Punai), Shorea laevis (Bangkirai), Shorea macrophylla (Tengkawang Tungkul) and Shorea leprosula. Shorea leprosula species are separated from other Shorea groups. This indicates that Shorea leprosula is closely related to other Shorea. Meanwhile, Shorea macrophylla and Shorea parvifolia are closely related because they are in one cluster, with a boostrap value of 85%.
Bioinformatics analyses of embryoid genes in oil palm tissue culture (Elaeis guineensis Jacq.)
Authors: Astari R P , Basyuni M , Siregar L A P , Damanik R I M 
Published: December 2022

AbstractOil palm (Elaeis guineensisJacq.) is a beneficial tropical crop that produces oil vegetables, those needs continue to increase. Clone planting on a large scale is one of the possibilities to increase oil palm production. Identification of genotype oil palm embryoid can optimize the efficiency of the culture process. Twenty-six projected embryoid genes with code amino acid from 850 to 936 bp from oil palm tissue culture were collected from the NCBI database. This study clarified the variation and role of physicochemical characteristic, possible peptide transfer and subcellular localization of the oil palm (Elaeis guineensisJacq.) embryoid genes. The similarity of genes in embryoids on phylogenetic trees showed the potential to detect the role of specific embryoid genes to help the breeders optimize cloning processes.
Etlingera elatior extract inhibits early developmental stage of Fasciola gigantica egg in vitro
Authors: Wulandari A R , Nurlaelasari A , Prasetyo D , Pawestri W , Nuraini D M , Cahyadi M , Hamid P H 
Published: December 2022

AbstractThe use of plants as natural anthelmintic is quite promising for parasite control. In this report, we evaluate the activity ofEtlingera elatiortoFasciola giganticaeggsin vitro. The eggs were collected from naturally-infected bovine in the Ampel Abbatoir, Boyolali, Central Java. The eggs were exposed toE. elatiorethanolic extract in different concentrations i.e., 5%, 2.5% and 1.25%. Fluconix 340 in the equal concentrations was positive control of anthelmintic and distilled water served as negative treatment. The eggs were placed in the dark until 9 days and observed under the light microscope on days 5 and 9. The results showed thatE. elatiorin the concentration of 5%, 2.5% and 1.25% significantly inhibited the initial development ofF. giganticacompared to the negative control (water) on days 5 and 9 treatments (P<0.05). TheE. elatioreffectively inhibits morulation and larva formation. Fluconix 340 5%, 2.5% and 1.25% were possessing higher ovicidal activities compared toE. elatiorsince day 5 of treatment.E. elatiorshowed effective inhibition to the initial development ofF. giganticaeggin vitro.
The effect of extraction methods towards antioxidant activity of ethanol extract of Picria fel-terrae Lour. Herbs
Authors: Dalimunthe A , Pertiwi D , Muhmmad M , Kaban V E , Nasri N , Satria D 
Published: December 2022

Abstract
Antioxidants are molecules that can inhibit or prevent the oxidation reactions of other molecules that generate free radicals. Antioxidants can be synthesized in the body (endogenous) or obtained from food intake (exogenous). Modern pharmacological investigations show that the extract of Picria fel-terrae Lour. Herbs. Effective as an antioxidant because of the high content of flavonoids and phenols. This study aims to analyze the antioxidant activity, total phenol content and total flavonoid content in ethanol extract (EE). The powder was extracted by Soxhletation, percolation and reflux method with absolute ethanol. Antioxidant activity was analyzed by 1,1-diphenyl-2-picrylhydrazyl (DPPH), FRAP, ABTS and CUPRAC. Total phenol content was measured using the Folin-Ciocalteau method and total flavonoid content was measured using AlCl3 reagent using colorimetric method. The best antioxidant activity and the highest total phenolic content were indicated by the soxhlet extraction method with IC50 23.52 ± 0.17 g/mL and 160.77 ± 0.95 mg GAE/g, and the highest total flavonoid content was indicated by the reflux method (1.08 ± 0. 02 mg QE/g). In conclusion, the ethanolic extract of Picria fel-terrae Lour. Herbs Lour with reflux extraction method can be further developed as an antioxidant.
The use of oil palm fruits waste brickets and manure in relationship as groundwater resistance materials to increase plant growth in critical land
Authors: Utomo B , Prasetyo A , Alfin M N , Dalimunthe A , Tamba P 
Published: December 2022

Abstract
The catchment area of Lake Toba geologically has soil properties that are sensitive to erosion because the land is hilly or mountainous with very steep slopes, very shallow soil solum (< 30 cm) to shallow (30-60 cm). Even though the level of rainfall in this area is quite high, the slope of the land causes the soil to easily lose ground water by the earth's gravity. Similarly, the level of erodibility is also high. The purpose of this research is to take advantage of the high potential of oil palm bunches waste which allows it to be used as a water retaining material compared to manure. To facilitate transportation, these two types of organic water retaining materials are used as briquettes. The study was structured using a non-factorial Randomized Block Design (RAK). Where each type of organic matter used 6 treatments with 6 replications, namely without using briquettes (P0) Doses of 0.25 kg, 0.50 kg, 0.75 kg, 1.00 kg and 1.25 kg, with 6 replications. The results shows that the waste briquettes of oil palm fruit bunches have the ability to hold water and increase the growth of Macadamia integrifolia plants which is the same as the ability to use manure.