bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estimation of magnetocaloric effect by means of phenomenological model in La0.67Ca0.33-xSrxMnO3 (x=0.035, 0.065) perovskite manganite
Authors: Cha Jongchol , Li Fenghua , Jon Jinhyok , Kim Jongchol 
Published: June 2022

Abstract
The magnetocaloric effect in the perovskite manganite La0.67Ca0.33-xSrxMnO3 with x=0.035, 0.065 have been investigated. Using Hamad’s phenomenological model, we have estimated the important magnetocaloric properties, for example, the thermal magnetization, the change of magnetic entropy and the relative cooling power. Considerable and tunable magnetocaloric effect in these compounds is advantageous to applications in near-room-temperature magnetic refrigeration. Therefore, these compounds are good candidates for working materials in magnetic refrigeration.
Investigation into mechanical properties of PBT propellant under accelerated aging at alternating temperature and constant strain
Authors: Ye Guanlin , Zhou Weiyong , Shen Zhibin 
Published: June 2022

Abstract
Solid propellants are typical viscoelastic materials that are subject to chemical ageing and mechanical damage under whole life cycle conditions. Through high and low temperature cycling tests on PBT propellant specimens under constant strain conditions, the effects of mechanical damage and temperature ageing on the mechanical properties of PBT propellant are simulated and analysed during the motor delivery, storage and operational duty cycles of PBT propellants subjected to environmental loads. The tests show that: during the ageing process of PBT propellant in the simulated natural environment, the tensile strength will gradually increase due to the influence of temperature load and manoeuvring load, and the initial modulus will increase due to the influence of internal stresses generated by curing and cooling, which will reduce the tensile strength, both of which will jointly affect the mechanical properties of the propellant. The force-thermal coupling accelerated ageing experiment can simulate the ageing process of solid motor pillars under natural conditions and predict their mechanical properties at various time stages.
Research on Flaw Detection Experiment of Ultrason
Authors: Zhong Haotian , Zhang Li , Shi Yipeng , Xia Zhenbiao , Duan Jingwen , Shi Bowen , Shi Huiyun , Li Yanjun 
Published: June 2022

Abstract
With the progress of modern science and technology, people have developed a special equipment to detect whether there is damage inside metal and non-metallic materials.Ultrasonic nondestructive testing detector is a portable industrial nondestructive testing detector, which cannot damage the detection object under the premise of the internal structure of the comprehensive detection object, but easily forms blind spots in the area of 2-3mm on the material surface and the nearby surface.Ultrasonic phased array nondestructive testing detector can compensate for this disadvantage and have high detection flexibility.This paper analyzes the advantages and disadvantages of the ultrasonic flaw detector and the ultrasonic phased array flaw detector.
Hole taper control in femtosecond pulsed laser drilling of silicon carbide ceramic
Authors: Wang Hong-Jian , Yang Tao , Wu Xiao-Xue , Deng Fu-Qin 
Published: June 2022

Abstract
Femtosecond pulsed laser drilling of silicon carbide (SiC) ceramic was performed to investigate effects of spiral scanning turns on hole taper control. Experimental results indicated that positive cone, cylinder and negative cone could be processed by adjusting spiral scanning turns. Although hole taper presented a decreasing trend as spiral scanning turns increased, it increased slightly at the condition of more dense paths. The changes of laser energy, debris and plasma caused by the change of spiral scanning turns were analyzed. It was worth mentioning that more spiral scanning turns meant longer drilling time, which would not only prolong the interaction between laser and materials, but also reduce the efficiency of laser drilling. On the premise of meeting the hole taper requirements, less spiral scanning turns were the preferred processing parameters. Differences of microstructure and elemental contents at hole wall were analyzed and discussed. Results indicated that contents of Si and O were higher, content of C was lower near the exit than that near the entrance.
Accounting for socioeconomic constraints in sustainable irrigation expansion assessments
Authors: van Maanen Nicole , Andrijevic Marina , Lejeune Quentin , Rosa Lorenzo , Lissner Tabea , Schleussner Carl-Friedrich 
Published: June 2022

Abstract
Sustainable irrigation expansion over water limited croplands is an important measure to enhance agricultural yields and increase the resilience of crop production to global warming. While existing global assessments of irrigation expansion mainly illustrate the biophysical potential for irrigation, socioeconomic factors such as weak governance or low income, that demonstrably impede the successful implementation of sustainable irrigation, remain largely underexplored. Here we provide five scenarios of sustainable irrigation deployment in the 21st century integrated into the framework of Shared Socioeconomic Pathways, which account for biophysical irrigation limits and socioeconomic constraints. We find that the potential for sustainable irrigation expansion implied by biophysical limits alone is considerably reduced when socioeconomic factors are considered. Even under an optimistic scenario of socio-economic development, we find that additional calories produced via sustainable irrigation by 2100 might reach only half of the maximum biophysical potential. Regions with currently modest socioeconomic development such as Sub-Saharan Africa are found to have the highest potential for improvements. In a scenario of sustainable development, Sub-Saharan Africa would be able to almost double irrigated food production and feed an additional 70 million people compared to 2020, whereas in a scenario where regional rivalry prevails, this potential would be halved. Increasing sustainable irrigation will be key for countries to meet the projected food demands, tackle malnutrition and rural poverty in the context of increasing impacts of anthropogenic climate change on food systems. Our results suggest that improving governance levels for example through enhancing the effectiveness of institutions will constitute an important leverage to increase adaptive capacity in the agricultural sector.
Weather Variation and Accuracy of Weather Prediction During Dry Season 2021 in The Jabotabek Using Voluntary Weather Observation Based on Social Media
Authors: Giarno  , Munawar  , Ferdiansyah E , Arifianto F , Pratiwi A , Yulianti S 
Published: June 2022

Abstract
The dynamics of rain events in Indonesia are very high, which causes variations in the accuracy of predictions and in situ rainfall observations or remote sensing rainfall estimates. Observations of the several extreme weather events show that rain fall occurs unevenly, especially in the city areas of Jakarta, Bogor, Tangerang, and Bekasi, commonly abbreviated as the Jabotabek. This region is a vulnerable area to hydro-meteorological disasters and evaluate how the influence of rain variations on the accuracy of weather prediction is constrained by the scarcity of in situ precipitation data. Then, the purpose of this study was to promote voluntary weather observations and to get an overview of the variation in the incidence of rain in the Jabotabek area through the STMKG Weather Care program. This team designed form of observation as easy as possible for respondents to understand, simple, and not time-consuming and spreaded using Google Forms and disseminate via WhatsApp as the most popular social media today. The results of the form filling indicate that social media has the opportunity to be developed to support the collection of weather data. Based on the evaluation of the form filling, it shows that the form is sufficient so that the respondents make relatively few mistakes. Moreover, the respondent’s error is generally in filling out the district’s name. The results of this voluntary weather observation can be used for the analysis of weather variations and the evaluation of weather predictions. The results of the analysis show that the higher the variation in weather conditions, the higher the difficulty of prediction, as the Bogor area has an accuracy of only 25%. Meanwhile, places, where the weather tends to be homogeneous, have an effect with high accuracies, such as in Bekasi Regency, which reaches 85%.
Decision Support System Determining Types of Food Crops Based on Soil Content Using the SMART Method (Simple Multi Attribute Rating Technique) and McCall
Authors: Yumarlin MZ , Bororing J E , Rahayu S , Haryanto E 
Published: June 2022

AbstractUtilization of decision support systems as a tool for decision makering that integrates directly with computer in providing information and solutions. This research implements the method of SMART (Simple Multi-Attribute Rating Technique), to calculate the criteria that become the benchmark for determination of the type of plant is appropriate based on the content soil. In building a Decision Support System using six criteria, namely hummus, regosol, alluvial, grumusol, andosol, and nitrogen. Testing the decision support factors to determine the type of plant-based on the soil as measured by McCall’s quality using 3 aspects of measurement. From the results 15 respondents obtained for the aspect of correctness with a value of 71.33%, the aspect of reliability with a value of 71.33%, reliability aspect with a value of 67.1%, and aspects of usability with a value of 48.27%. Overall, the test results from the 3 test aspects results obtained are 62.37%, which indicates this system has a good category and is worth to use.
Environmentally friendly cycling habit behaviour: could social influence, hedonic motivation and psychological needs develop it?
Authors: Setianan A R , Putri W H , Kresnanto N C , Sulistiastuti E 
Published: June 2022

Abstract
The COVID-19 pandemic has created new habits for the people of Indonesia. Cycling has become a more popular habit and hobby in some society members during mandatory work from home. Self Determination Theory, which explains the human motivation, personality development, and behavioural self-regulation, will be used in this research context to develop a research model. This research examines how hedonic motivation and psychological needs as inner resources for behavioural decision making and social influence as external coercion influences environmentally friendly behaviour. We used multiple regression analysis and found that hedonic motivation and psychological needs influence environmentally friendly behaviour. It can be concluded that environmentally friendly behaviour is more straightforward to develop with inner motivation than external coercion.
Synthesis and Effectiveness of Snake Fruit (Salacca zalacca) Seed Charcoal Bio-Adsorbent in Reducing Remazol Brilliant Blue
Authors: Rahmayanti A , Firdaus A , Tamyiz M , Hamidah L N , Oktavia L , Rosyidah E , Widiyanti A 
Published: June 2022

Abstract
The manufacture of adsorbents by utilizing biomass waste continues to be developed to obtain alternative materials with high effectiveness. Adsorbents should be made from easily available materials, have low operating costs, have easy manufacturing processes, and be environmentally friendly. Snake fruit seeds have economic value to be used as activated carbon in the adsorption method for the reduction of Remazol Brilliant Blue. Snake fruit seed charcoal already has a high activated carbon. The activated carbon pores were widened through acid activation, to increase the adsorption capacity of Remazol blue. The purpose of this study was to determine the effect of bio-adsorbent concentration of snake fruit seed charcoal in absorbing Remazol Brilliant Blue levels. Snake fruit seed charcoal has been activated with 1 M HCL to become a bio-adsorbent of snake fruit seed charcoal with various stirrings of 3, 4, 5, 6, 7, rpm. Characterization of bio-adsorbent of snake fruit seed charcoal has been carried out by spectrophotometry UV-VIS, FTIR, SEM, and SEM-EDX. Snake fruit seed was a carbon source that can be used as a base material for activated carbon and adsorbent for Remazol Brilliant Blue dye. So, it has reduced the impact of textile dye waste pollution.
Disaster Management Using a Contingency Approach in the Special Region of Yogyakarta
Authors: Koenti I J 
Published: June 2022

Abstract
The purpose of this study is to examine the disaster management system with a contingency approach by involving community participation in the Special Region of Yogyakarta. Disaster is a state of severe disruptions in the functionality of any society or county. Knowledge management is a vital part of disaster preparedness in reducing the disaster impacts. A case study method based on qualitative data was used to conduct legal research. The findings show that, contingency planning and regional planning have a reciprocal relationship. Contingencies are currently only used in particular sorts of calamities. Currently, the application of contingencies is still limited to certain types of disasters. Therefore, disaster management with a contingency approach is essential, especially in the Special Region of Yogyakarta. It is necessary to regulate through Regional Regulations in using a contingency approach for disaster management adequately, effectively and, responsibly.
Effectiveness of LED light spectrum exposure on growth performance and color quality of juvenile polka dot grouper (Cromileptes altivelis)
Authors: Nirmala K , Hastuti Y P , Ghukos T P 
Published: June 2022

Abstract
Polka dot grouper (Cromileptes altivelis) is a saltwater ornamental fish that has a characteristic of black spots on the surface of its body. Polka dot grouper has a slow growth rate and color quality that fade in captivity. The purpose of this study was to evaluate the growth performance and color quality of polka dot grouper under exposure to different light-emitting diode (LED) spectrums in a recirculating system. Polka dot grouper was maintained in a 50×40×40 cm3 aquarium with a recirculating system for 30 days. This study used a randomized block design with five treatments and three groups. The treatments consisted of control (room light) and four types of the LED light spectrum with different wavelengths, i.e., red, green, blue, and white. The results showed that the best values for growth performance, physiological response, and color quality were found in the treatment of red LED light. Using a red LED light spectrum exposure in a recirculating system can improve the growth performance and color quality of the polka dot grouper.
Effects of different stocking densities on growth performance of Tor soro fingerlings under recirculation aquaculture system
Authors: Haser T F , Supriyono E , Nirmala K , Widanarni  , Prihadi T H , Budiardi T , Azmi F , Nurdin M S 
Published: June 2022

Abstract
Intensive aquaculture is an attempt to farm fish at a high stocking density. High stocking density in Tor soro can affect growth, survival, and feed efficiency. Therefore, intensive aquaculture usually adopts several technologies and one of them can be found in the form of a recirculation aquaculture system. This study aimed to examine optimal stocking density supporting Tor soro performance under the recirculation aquaculture system. Four different stocking densities were used as treatments: 2 fingerlings/L, 3 fingerlings/L, 4 fingerlings/L and 5 fingerlings/L. The experiment followed a completely randomized design experiment with four replications. Tor soro fingerlings sized 4-5 cm were reared in a 48 × 48 × 30 cm3 recirculated aquarium, with a water debit of 40 L in each tank for 60 days. Growth and survivals of fingerlings differed significantly between high and low stocking densities. The highest growth occurred to fingerlings at 4 stocking densities per liter (1.67±0.06) and the lowest growth occurred to the group with 5 fingerlings/L (0.34±0.56). Stocking density also significantly affected fingerling survivals where the first group attained 100% survivals, followed by a group of 4 fingerlings/L with (96±4.00%). Results from this study recommend stocking the fingerlings at a density of 4/L to maintain optimal growth conditions.
Determination of hub and feeder: as a concept to integrate fishing ports in Indonesia
Authors: Srialdoko Jonet , Supriatna Ateng , Hendrawan  
Published: June 2022

Abstract
In the National Medium-Term Plan 2020-2024 on marine and fisheries sector, the government has set a work plan to integrate several fishing ports. The integration of fishing ports connects all fishing ports in Indonesia in an integral part and a system that supports each other which can be connected to domestic and international markets. The scoring system has been applied in 22 fishing ports to determine the fishing ports as a hub (center), sub-hub, feeders, and sub-feeders. The score value 3.50 above is determined for the fishing port as a hub, while the Sub-Hub has a scoring value 3.50 to 2.60. Scoring value <2.60 is designated as feeder ports. From the analysis and scoring results on 22 fishing ports in Indonesia, there are 4 Hub ports, namely PPS Belawan, PPS Nizam Zachman Jakarta, PPS Bitung, and PPS Kendari. While for the feeder port, were set in 9 fishing ports namely PPN Sungai Liat, PPN Tanjung Pandan, PPN Karangantu, PPN Kejawan, PPN Pengambengan, PPN Kwandang, PPN Ambon, PPN Tual, and PPN Teluk Batang. In order, for Sub-Hub, determined 9 fishing ports (PPS Bungus, PPS Cilacap, PPN Sibolga, PPN Pelabuhanratu, PPN Pekalongan, PPN Prigi, PPN Brondong, PPN Pemangkat, and PPN Ternate. To optimize and increase the operational services of its fishing ports in an integrated system, the government should revitalize the fishing ports to increase and rehabilitate all facilities based on national and international standards.
Northern Coast of java grouper fishery characteristics: an analysis of time series landing data
Authors: Hudaya Yaya , Besweni  , Budiarto Aris , Natsir Mohamad , Yulianto Irfan 
Published: June 2022

Abstract
The northern coasts of Java (PANTURA) play important roles for Indonesian fisheries development, since a significant number of fishing vessels originated from this area fish in national wide Indonesian waters. One of the economically and ecologically important fish products in Indonesia is grouper and also landed in PANTURA. This study aims to understand grouper fishery that are landed in PANTURA. We utilize a data set from Fishing Port Data Center nationally known as Pusat Informasi Pelabuhan Perikanan (PIPP) of Ministry of Marine Affairs and Fisheries, an integrated national landing data center. A descriptive analysis and linear modeling were performed to understand the fishery. Based on PIPP data from 2016–2020, there were 22 species from four genera dominated by Epinephelus sp., Cephalopholis sp., Cromileptis sp, and Plectropomus sp. The main fishing gears used to catch this group of fish were danish seine or cantrang, mini danish seine or dogol, seine net or payang, and longline or rawai. Based on the analyses, the fishes were caught from eight Indonesia FMAs (WPPN RI) i.e., WPP NRI 571, 572, 573, 711, 712, 713, 715, and 718. Results of linear model employed for four main species of Epinephelids, were found they had stable and decreasing pattern of standardized catch per unit effort.
Coral reefs recovery post bleaching event in Central Tapanuli, North Sumatra
Authors: Siringoringo R M , Abrar M , Sari N W P , Putra R D , Hukom F D , Sianturi O R , Sutiadi R , Arbianto B 
Published: June 2022

Abstract
Temperatures on the west coast of Sumatra, South Java, Bali, and Nusa Tenggara in the Indian Ocean rose dramatically in 2016. The extreme increase in temperature greatly affects sea surface temperature and coral reef ecosystems. Central Tapanuli waters were also the area that could not escape this phenomenon. Coral bleaching has caused damage to coral reefs which is characterized by decreasing live coral’s cover. Observations on coral reef recovery have been carried out at 13 sites in Central Tapanuli waters. Observations were made using the UPT (Underwater Photo Transect) method to determine live coral’s cover. The coral fish density was determined using the UVC (Underwater Visual Census) method. From the observations, coral cover decreased by 57,68% in 2016. Observations were made in 2015, 2016, 2018, and 2021. Observations in 2018 have shown increasing live coral cover by approximately 5%. Meanwhile, in 2021 there was an increase in live coral cover by approximately 8.25% from 2018. Even though coral composition changes and mostly the number of coral decreases, after 5 years, the number of corals starts to increase. The reef health index likewise rises in tandem with these changes. Despite some chronic stress being present at some places, the water quality was favorable for coral recovery.
Isolation and Characterization of Tunicates (Ascidian: Phallusia sp.) associative marine bacteria in agar media with Pb heavy metal addition
Authors: Ismet Meutia Samira , Tera Yan , Sari Anita Edya Melliana , Aryani Anisa Fitri 
Published: June 2022

AbstractTunicates or Ascidian (sea squirt) is a very diverse and cosmopolitan organism, also could live in contaminated environment. Tunicates could harbor various associative bacteria that could produce potential secondary metabolites and adapt to heavy metals. This research aimed to isolate and characterize associative bacteria ofPhallusiasp. (Ascidian) using Sea Water Complete Agar (SWCA) media with Pb heavy metals addition. Associative bacteria were isolated from different parts ofPhallusiasp. body tissue (basal, middle, and apical part), using several concentrations of Pb added to the media. Three different concentration was applied, K-as control (non-added Pb), K+ (0.008 mgL-1 Pb), and P (0.05 mgL-1 Pb). Result showed that total count of associative bacteria from different parts of body tissue was not significantly different, in neither of Pb concentrations (ANOVA, P value of 0.16). There were 24 isolates with different colonies successively found from all media. Most of the isolate’s colony has white pigmentation, dominated by Gram-negative bacteria. Motility assay showed that all bacteria isolate was motile, with 16 isolates could hydrolyse starch. Lipase activity was found in 20 isolates, and all isolates have catalase, and glucose and mannose fermentative activity. There were 21 isolates with cytochrome oxidation activity. Morphological and physiological characterization suggest that associative bacteria belonged to five groups of bacteria, including four different genera (Alteromonas, Bacillus, Deleya, andVibrio). Kruskal-Wallis test result showed that the genus composition between each Pb concentration was insignificantly different, with a P value of 0.878.