bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental investigation on ballistics resistance of UHMWPE fiber laminates
Authors: Zhou Nan , Zhu Jingwei , Jiang Jing , Zhou Guixue 
Published: June 2022

Abstract
To study the application of ultra-high molecular weight polyethylene fiber (UHMWPE) laminates in light protection field, the ballistic test was used to study the ballistic resistance of UHMWPE fiber materials. In the experiment, 9mm standard bullets were launched by a revolver pistol and 92 type pistol to penetrate the fiber laminates respectively, and the initial velocity of the bullet was recorded by the infrared tachometer. The influence of the areal density, the number of layers, the incident angle and the initial velocity on the protective properties of the fiber laminates were discussed, meanwhile, the microscopic characteristics of the failure mode of the fiber laminates were studied by stereomicroscope. The results show that the areal density and the layer number have obvious influence on the ballistic resistance of the fiber laminates, and the influence of the two materials should be taken into account. In the non-penetrating condition, the total deformation of the fiber laminates is large and the failure of the fiber bundle is the main failure mode. And when penetrated completely, the tensile fracture of fiber laminate material is the main failure mechanism. The study of this paper provides experimental reference for the structural design of UHMWPE fiber laminates.
The effect of solvents on the morphology of NTO crystal by molecular dynamics
Authors: GE Ming , CHEN Kun , LI Lijie , HUANG Lun , NING Liyuan , LIU Qiaoe 
Published: June 2022

Abstract
In this paper, a molecular model for adsorption of NTO surface-solvent was constructed, and the effects of different solvents on the morphology of NTO crystal were simulated by molecular dynamics. The selected solvents included ethanol, water, acetone, N-methylpyrrolidone (NMP), ethyl acetate and N,N-dimethylformamide. Pure solvents and two co-solvents including NMP/water and ethanol/water were studied to provide theoretical guidance for the selection of solvent systems for NTO recrystallization. In pure solvents, the results show that the crystal morphology of NTO can be effected by all solvent and in NMP solvent is the best. In co-solvents, when the mass ratio of ethanol to water is 9:1, the best morphology of NTO crystals is found . In ethanol/water system, the morphology of NTO crystals changes from near-cube to cuboid with the decrease of ethanol mass fraction, and the aspect ratios of NTO crystals increase. In NMP/water system, the decrease of the mass fraction of NMP makes the crystal morphology deteriorate. This is manifested as the crystal develops towards a narrow needle shape, and the value of the aspect ratio increases.
Tackling climate risk to sustainably intensify smallholder maize farming systems in southern Africa
Authors: Nelson William C D , Hoffmann Munir P , May Carlotta , Mashao Frederick , Ayisi Kingsley , Odhiambo Jude , Bringhenti Thomas , Feil Jan Henning , Yazdan Bakhsh Sara , Abdulai Issaka , Rötter Reimund P 
Published: June 2022

Abstract
Sustainable intensification (SI) of low input farming systems is promoted as a strategy to improve smallholder farmer food security in southern Africa. Using the Limpopo province South Africa as a case study (four villages across a climate gradient), we combined survey data (140 households) and quantitative agronomic observations to understand climate-induced limitations for SI of maize-based smallholder systems. Insights were used to benchmark the agroecosystem model Agricultural Production System sIMulator, which was setup to ex ante evaluate technology packages (TPs) over 21-seasons (1998–2019): TP0 status quo (no input, broadcast sowing), TP1 fertiliser (micro dosing), TP2 planting density (recommended), TP3 weeding (all removed), TP4 irrigation, TP5 planting date (early, recommended), and TP6 all combined (TPs 1–5). An additional TP7 (forecasting) investigated varying planting density and fertiliser in line with weather forecasts. Input intensity levels were low and villages expressed similar challenges to climate risk adaptation, with strategies mostly limited to adjusted planting dates and densities, with less than 2% of farmers having access to water for irrigation. Simulations showed that combining all management interventions would be expected to lead to the highest mean maize grain yields (3200 kg ha−1 across villages) and the lowest harvest failure risk compared to individual interventions. Likewise, simulations suggested that irrigation alone would not result in yield gains and simple agronomic adjustments in line with weather forecasts indicated that farmers could expect to turn rainfall variability into an opportunity well worth taking advantage of. Our study emphasises the need for a cropping systems approach that addresses multiple crop stresses simultaneously.
Detection of differentiated thyroid carcinoma in exhaled breath with an electronic nose
Authors: Scheepers Max H M C , Al-Difaie Zaid J J , Wintjens Anne G W E , Engelen Sanne M E , Havekes Bas , Lubbers Tim , Coolsen Marielle M E , van der Palen Job , van Ginhoven Tessa M , Vriens Menno , Bouvy Nicole D 
Published: June 2022

Abstract
This proof-of-principle study investigates the diagnostic performance of the Aeonose in differentiating malignant from benign thyroid diseases based on volatile organic compound analysis in exhaled breath. All patients with a suspicious thyroid nodule planned for surgery, exhaled in the Aeonose. Definitive diagnosis was provided by histopathological determination after surgical resection. Breath samples were analyzed utilizing artificial neural networking. About 133 participants were included, 48 of whom were diagnosed with well-differentiated thyroid cancer. A sensitivity of 0.73 and a negative predictive value (NPV) of 0.82 were found. The sensitivity and NPV improved to 0.94 and 0.95 respectively after adding clinical variables via multivariate logistic regression analysis. This study demonstrates the feasibility of the Aeonose to discriminate between malignant and benign thyroid disease. With a high NPV, low cost, and non-invasive nature, the Aeonose may be a promising diagnostic tool in the detection of thyroid cancer.
Tourism Mitigation Among Crisis, A Case Study from Borobudur in Environment, Economic and Social Perspectives
Authors: Kresnanto N C , Putri W H 
Published: June 2022

Abstract
The tourism industry is a significant GDP contributor to almost all countries globally (10.4% on average in 2019). For every four new jobs that appear, it is recorded that one job is from the tourism sector. But on the other hand, this industry is also an industry vulnerable to the effects of crises such as economics, politics, disasters, and pandemics. Next, to determine how much influence the economy, politics, disasters, and pandemics have on tourism, it is necessary to conduct a comprehensive study of these effects by taking lessons from various events. Furthermore, the study will also discuss Borobudur in-depth and see the possible tourism growth trend after the crisis. Borobudur tourism has experienced good growth in a polynomial function, has slumped due to the Covid-19 pandemic by more than -75%. Lesson learned from the previous crisis, conditions will return to normal 3-4 years from the first impact of the pandemic. If growth is calculated from the lowest position during the pandemic, it is estimated that Borobudur tourism conditions will return to conditions in 2017 (peak conditions) in 2029.
Economic Analysis of Urban Land Use in Yogyakarta City
Authors: Raharti R , Burhanudin  , Kartinah  , Jebarus B 
Published: June 2022

Abstract
This study aims to analyze the use of urban land in the city of Yogyakarta economically. The analytical method used in this research is multiple linear regression with Ordinary Least Square (OLS). This library uses secondary data, namely economic growth, population density, migration, and land use. The formulation of the research problem is how the impact of economic growth, population density, and migration on urban land use in the city of Yogyakarta. The results showed that economic growth, population density, and migration positively and significantly affected urban land use in Yogyakarta. The Yogyakarta City Government needs to increase economic growth by encouraging investment in sectors to increase regional income. Investment incentives can cover various aspects affecting the increase in GRDP. In addition, the city of Yogyakarta should encourage increased income growth to optimize the region’s potential to support economic growth.
Public Trust Doctrine in Indonesia: Expectation and Prospect
Authors: Hapsari M A , Suswoto  , Ariyani N 
Published: June 2022

Abstract
Public Trust Doctrine (PTD) is a principle that states the government holds the trust of natural resources for public interest or public use above all interest, even if it is already a private-owned property. A similar clause can be found in Article 33 (3) of Indonesia’s 1945 Constitution that states all of the vital natural resources are under the control of the State and used for the maximum benefit and prosperity of the people. On the contrary to its Constitution, Indonesia’s government enacted many unfortunate regulations that promote unsustainable exploitation of natural resources and tossing aside public interest and welfare. The research described how other countries perceive PTD and its practices and then follows the possibilities and prospects of conducting PTD in Indonesia’s law perspective. The research is a qualitative research conducted in doctrinal legal method with a comparative and analytical approach. From the arguments and analysis conducted, PTD can be adopted and integrated in Indonesia environmental scenes with amendment and conformation to current applied law.
Reproduction performance of corydoras fish Corydoras paleatus spawned with different male to female ratio
Authors: Maulana F , Carman O , Putra A K 
Published: June 2022

Abstract
The sex ratio in spawning can affect the efficiency and success of hatchery activities because sex ratio in spawning affects the number of eggs, the degree of fertilization, and the degree of hatching of eggs. Until now, there is limited research conducted in Corydoras paleatus fish spawning thus this study aims to determine differences in the reproductive performance of C. paleatus with different male sex ratios. This study uses three treatments, which are the ratio of fish male and female (1:1), (2:1), and (3:1). Each treatment uses one female fish. The vessel used in fish spawning is an aquarium with a size of 50 × 25 × 30 cm3. Spawning lasts for seven days and eggs are collected every day at 08.00. The number of eggs and larvae produced was not significantly different between treatments. Larvae produced by C. paleatus were 2,154 fish or 538 fish per female per week. The ratio (1:1) was considered an appropriate ratio in spawning C. paleatus fish because it has a high efficiency value.
Protogynous sex change in ricefield eel Monopterus albus (Zuiew, 1793) by hormonal induction using javanese chili extract (Piper retrofractum Vahl)
Authors: Soelistyowati D T , Arfah H , Maulana F 
Published: June 2022

Abstract
The ricefield eel Monopterus albus (Zuiew, 1793) is a protogynous hermaphrodite that undergoes sex change from female at the beginning of its life cycle to becoming male after going through the intersex phase. This study aims to evaluate the sex status of ricefield eels measuring 18–55 cm and the development of protogynous sex change by hormonal induction using Javanese chili extract (Piper retrofractum Vahl) through injection. One hundred and twenty eels averaged 24.86 ± 0.76 cm of length and 10.65 ± 0.83 g of weight was used in this research. A completely randomized experimental design consisted of four treatments (different doses of Javanese chili extract) and three replications were applied in this research. The dose of Javanese chili extract given was 187.5 g.kg-1 fish (P1) and 375 g.kg-1 fish (P2) compared to the control with injection using NaCl 3 mL.kg-1 fish (P0) and without injection (K). Injections through intramuscular were given 5 times with an interval of 7 days and observations of sex status were carried out every 14 days based on the development of the gonads. In the normal conditions, the sex status of ricefield eels measuring 20-33 cm in length indicates females, while intersex has a length ranging from 33–43 cm, and males with a length range of 43–55 cm. Hormone induction by injection of Javanese chili extract at a dose of ECJ 375 g.kg-1 fish produced a sex change percentage of eels with 75% male sex status and 25% intersex with an average length of 24.88 ± 0.35 cm and a weight of 10.22 ± 0.14 g.
Catching trial around portable Fish Aggregating Devices (FADs) at Belitung Waters
Authors: Yusfiandayani Roza , Mulyono  , Nugroho Sahrin 
Published: June 2022

Abstract
Belitung Regency is an administrative area in the Bangka Belitung Islands Province. Handline is one of the most popular fishing gear in Belitung Island. However, the production value of handline fishing gear has decreased recently. This decrease was caused by the lack of fishing technology in handline fishing which potentially threatened the sustainability of small-scale fishing industry in the region. The use of portable Fish Aggregating Devices (FADs) technology was expected to increase the productivity of handline fishing gear. This study aims to compare the composition of handline catch, productivity, and fishers total income using portable FADs and without FADs. Sixteen experimental fishing trips were conducted to collect data. The results showed that the dominant catch of handline using portable FADs was threadfin breams (Nemipterus hexodon) (50.7%), greater lizardfish (Saurida tumbil) (27.4%), yellow stripe threadfin bream (Pentapodus aureofasciatus) (10.7%), grouper (Epinephelus bleeker) (4.6%), monocle bream (Scolopsis sp.) (4.2%), yellow jack (Caranx bartholomei) (2.1%), and mackerel (Acanthocybium solandri) (0.2%). The number of catches using portable FADs was 521 of fish (37%), while the one without FADs was 888 of fish (63%). However, based on its weight, the operation using portable FADs resulted in 84.4 kg (58%) and those without FADs was 61.6 kg (41%). The productivity of handline fishing with portable FADs was higher, 1.32 kg / trip, compared to its counterpart which was 0.91 kg / trip. Based on the Kruskal-Wallis test, it showed that the use of portable FADs has a significant effect on handline fishing. Additionally, the total income of fishermen with portable FADs was higher than those without portable FADs.
Spatio-temporal of mangrove vegetation based on the analysis of multi-temporal sentinel-2 satellite imageries at Jepara Regency, Indonesia
Authors: Hayati Arif Noor , Afiati Norma , Supriharyono  , Helmi Muhammad 
Published: June 2022

Abstract
Mangrove areas in the northern coast of Jepara Regency have been threatened by coastal erosion and changes in land use since 1980. These areas represent coastal ecosystems with significant ecological, biological, and economic importance. The status of these ecosystems needs to be monitored; the latest condition is important to local authorities. Rate of change in mangrove conditions can be used to forecast the future condition of these coastal areas. This study aims to determine the temporal changes in the area and density of mangrove vegetation in Jepara Regency in 2017 and 2020. This study applied analysis of Sentinel 2-A multitemporal satellite imagery and classification using random forest on the Google Earth Engine platform. It was found that the mangrove area shrank from 103 ha in 2017 to 95 ha in 2020. The vegetations showed that changes in mangrove area in Jepara Regency have decreased in the rare and dense mangrove density types. The density of rare and dense mangroves experienced a decrease in area of 6 and 5 hectares, respectively. No mangroves with dense cover were found in 2020. Meanwhile, mangroves with moderate cover experienced an increase in area of 3 hectares in 2020 compared to last year 2017.
Low genetic diversity and a mixing population of the reef Manta ray (Mobula alfredi, Krefft 1868) between three populations across Indonesian seas revealed by Mitochondrial DNA
Authors: Phardana T , Subhan B , Naulita Y , Sani L M I , Madduppa H 
Published: June 2022

Abstract

Mobula alfredi is a critically endangered species of the Mobulidae family that can be found in the subtropics, including Indonesia. However, population connectedness, which is critical for managing and conserving populations, was previously unknown. Based on 614-bp of cytochrome oxidase 1 (COI) mtDNA, this study looked into the genetic structure and genetic diversity of M. alfredi between three major populations in Indonesia (Raja Ampat, Komodo Island, and Nusa Penida). Between April and December 2016, 72 tissue samples were collected using the biopsy during expedition. Komodo Island has the largest haplotype diversity and nucleotide diversity, while Raja Ampat and Nusa Penida had the lowest. Low and non-significant genetic differences were discovered between groups. The genetic variation values from the entire population revealed a greater variety within the population. Individuals of M. alfredi from three populations were mixed over Indonesian seas, as shown by the phylogenetic reconstruction and haplotype network, which was divided into two groups. M. alfredi is vulnerable to environmental change because of its low genetic diversity.
Forecasting the stranded area of marine debris in Indonesian coasts using mobidrift model and floating drifter
Authors: Gautama B G , Rizal A , Rahmania R , Farhan A R , Berlianty D , Priyono B , Siong K , Harjono M R , Voisin J B , Maes C , Dobler D , Dufau C , Lucas M , Fauny O 
Published: June 2022

Abstract
The problem of marine debris became a concern of world scientists that placed Indonesia as the second contributor of the world. Plastic litter that leaked from the land and came through the river is a major source of Indonesia marine debris. This marine debris is a serious threat for ocean and coastal ecosystems. The Ministry of Marine Affairs and Fisheries of Indonesia supports the Presidential Regulation to reduce the plastic litter to 70% by 2025 by developing numerical modeling of marine plastic litter trajectory. Using a user-friendly web portal interface, we can simulate the trajectory of marine plastic litter from different points of source at different seasons. Wind, current, and tide data were used to force the particle on the simulation. The result of the model was compared with the record of the real time movement of twenty drifters that were released from three rivers mouth. The development of this trajectory model will become a useful tool to provide the information of the movement of marine debris in Indonesian sea waters and beyond. Knowing the path and stranded location in each season will improve our policy of planning and mitigate the impact of marine debris.
Development and growth of massive coral Lobophyllia hemprichii transplanted on Pramuka Island, Thousand Islands, Jakarta
Authors: Arafat Dondy , Soedharma Dedi , Subhan Beginer , Madduppa Hawis , Ervina Ayu , Santoso Prakas , Margono Widyarto , Hidayat Silki Anisa , Anggraeny Bunga 
Published: June 2022

Abstract
The condition of coral reefs in Indonesia is declining, one of the efforts to restore the condition is to carry out coral transplants. The method used in this research is fragmentation transplantation. This study was conducted to determine the effect of fragmentation (cutting) on coral species Lobophyllia hemprichii from F1 parent transplants carried out on Pramuka Island, Seribu Islands Jakarta. There were two types of coral cutting treatment, namely L1 (wound 1) and L2 (wound 2), with 14 replications. This study showed that there was no effect on the number of cuttings on the survival (SR) and growth of the sub-massive coral Lobophyllia hemprichii (P>0.05). All coral fragments were alive until the end of the observation (SR=100%) and there was an increase in fragment length every month in 2 treatments. The increase in length over 6 months in corals with 1 wound was 10.17 mm (from 67.48 mm to 79.65 mm) and in corals with 2 wounds was 11.74 mm (from 79.01 mm to 90.75 mm). Coral growth rate was also not significantly different between the two treatments (P>0.05), with a range of 1.54-1.94 mm/month (wound 1) and 1.49-3.16 mm/month (wound 2). The growth rate increased after the corals recovered from wound healing (after 5 months of transplantation).
Applications of edible coating made from sago starchwith essential oil additives on tatihu fish fillet (Thunnus albacares)
Authors: Renur NM , Sutrisno  , Darmawati E , Nurjanah  
Published: June 2022

Abstract
Maluku is famous for its natural resources such as fish, sago, cloves, and nutmeg. Tatihu fish, otherwise known as yellowfin tuna. Essential oils are oils that consist of a mixture of liquid compounds obtained from the distillation of various plant parts. This study aimed to make an edible coating from sago starch with essential oil additives and its application to tatihu fish fillets. The first stage of this research was to isolate the essential oils of cloves and nutmeg, followed by determination of the antimicrobial substances from the essential oils before it was selected for fish spoilage bacteria and applied to the tatihu fish fillet. The extract yielded of the isolation of essential oils was 3.54% clove oil and 1.16% for nutmeg oil. Clove and nutmeg oil antibacterial test results gave positive results for E. coli and S. aureus. The MIC test results for clove oil and nutmeg oil against E. coli bacteria showed bacteriostatic activity with a minimum concentration of 0.195 and 12.5%, and against S. aureus bacteria by 0.098 and 25%, respectively. Edible coating application using 8% clove oil significantly affected the TPC and TVB values for different storage times.
Antibacterial activity of ethanolic Spirulina platensis extract-water soluble chitosan nanoparticles
Authors: Hardiningtyas Safrina Dyah , Putri Febby Amanda , Setyaningsih Iriani 
Published: June 2022

Abstract

Spirulina platensis is a microalga containing bioactive compound as antibacterial activity. The antibacterial compound from Spirulina can be used to treat bacterial infections on the skin such as acne. However, enhancement penetration of bioactive compounds through the skin was needed. The objective of this study was to determine bioactive compounds from Spirulina, synthesize Spirulina extract-water soluble chitosan nanoparticles using the ionic gelation method, and measure the antibacterial activity of Spirulina extract and its nanoparticles. For the synthesis of the nanoparticles, differences of Spirulina extract concentrations were used, including 3.25, 7.5, and 15 mg/mL. The yield of ethanolic Spirulina extract was 13.87±4.16% with the bioactive components of saponins, tannins, steroids, and phenols. The Spirulina extract-loaded chitosan nanoparticles were successfully fabricated with a nano-range size and narrow polydispersity. The amount of loading of Spirulina extract has affected the size and dispersion of nanoparticles. The antibacterial activity of nanoparticles showed higher than pure Spirulina extract only through Staphylococcus aureus and Pseudomonas aeruginosa, classified as moderate inhibition zones (5-10 mm). These suggested that nanoencapsulation could increase extract uptake on bacteria cells. The ethanolic Spirulina extract-chitosan nanoparticles have a potency for antibacterial agents on cosmeceutical products.