bluuebunny/crossref_metadata_2025_split huggingface dataset:
Self-sustained oscillations of active viscoelastic matter
Authors: Plan Emmanuel L C VI M , Le Thi Huong , Yeomans Julia M , Doostmohammadi Amin 
Published: May 2022

Abstract
Models of active nematics in biological systems normally require complexity arising from the hydrodynamics involved at the microscopic level as well as the viscoelastic nature of the system. Here we show that a minimal, space-independent, model based on the temporal alignment of active and polymeric particles provides an avenue to predict and study their coupled dynamics within the framework of dynamical systems. In particular, we examine, using analytical and numerical methods, how such a simple model can display self-sustained oscillations in an activity-driven viscoelastic shear flow.
Markov chains generated by convolutions of orthogonality measures
Authors: Odake Satoru , Sasaki Ryu 
Published: May 2022

AbstractAbout two dozens of exactly solvable Markov chains on one-dimensional finite and semi-infinite integer lattices are constructed in terms of convolutions of orthogonality measures of the Krawtchouk, Hahn, Meixner, Charlier,q-Hahn,q-Meixner and littleq-Jacobi polynomials. By construction, the stationary probability distributions, the complete sets of eigenvalues and eigenvectors are provided by the polynomials and the orthogonality measures. An interesting property possessed by these stationary probability distributions, called ‘convolutional self-similarity,’ is demonstrated.
Estimating entropy production rates with first-passage processes
Authors: Neri Izaak 
Published: May 2022

AbstractWe consider the problem of estimating the mean entropy production rate in a nonequilibrium process from the measurements of first-passage quantities associated with a single current. For first-passage processes with large thresholds, references (Roldánet al2015Phys. Rev. Lett.115250602; Neri 2022SciPost Phys.12139) identified a ratio of first-passage observables—involving the mean first-passage time, the splitting probability, and the first-passage thresholds—that lower bounds the entropy production rate and is an unbiased estimator of the entropy production rate when applied to a current that is proportional to the stochastic entropy production. Here, we show that also at finite thresholds, a finite number of realisations of the nonequilibrium process, and for currents that are not proportional to the stochastic entropy production, first-passage ratios can accurately estimate the rate of dissipation. In particular, first-passage ratios capture a finite fraction of the total entropy production rate in regimes far from thermal equilibrium where thermodynamic uncertainty ratios capture a negligible fraction of the total entropy production rate. Moreover, we show that first-passage ratios incorporate nonMarkovian statistics in the estimated value of the dissipation rate, which is difficult to include in estimates based on Kullback–Leibler divergences. Taken together, we show that entropy production estimation with first-passage ratios complements well estimation methods based on thermodynamic uncertainty ratios and Kullback–Leibler divergences.
Characteristics of moringa leaf powder as fortification and consumer acceptance
Authors: Handayani Y , Aminah S , Yanis M , Waryat  
Published: May 2022

Abstract

Moringa Oleifera is not only rich in nutrients but also has functional properties with efficacies and benefits for human health. Moringa leaf powder as an intermediate product can be used as a fortification to enrich nutrition in food products in an acceptable concentrate for consumers. This study aims to determine the physical and chemical characteristics of Moringa leaf powder and the level of consumer acceptance of the fortification product. The research included the process of making Moringa leaf powder until the preeminent temperature and drying time were obtained and the use of Moringa leaf powder as a fortification in ice cream. Fortification of ice cream used four treatments of the powder concentration in 0.5%, 1%, 1.5% and 2%. The results showed the yield of the powder was 25%, with a 7.80 % water content at a temperature of 47° – 50 °C for five hours. The level of consumer acceptance of fortified ice cream shows the same acceptance of color, aroma, texture, except taste. Consumers prefer formulas with a concentration of 1% Moringa powder, 5% creamer, 15% sugar, 0.5 % CMC, and 78.5 % milk. Moringa aroma and taste have an impact on consumer acceptance of Moringa ice cream.
The effect of land cover forest on fluctuations in availability of water in the Batutegi Dam, Lampung, Indonesia
Authors: Artika E , Yuwono S B , Banuwa I S , Setiawan A , Bakri S , Wahono E P 
Published: May 2022

Abstract
The Sekampung Hulu watershed has an important role in Lampung Province, as a catchment area for the Batutegi Dam with the main function as a supplier of irrigation water therefore it is very dependent on the availability of water (inflow). The inflow fluctuation is one of the indicators to determine the hydrological condition. The relationship between forest cover and inflow fluctuations was obtained from forest cover analysis on Landsat images using the object-oriented classification (OOC) method and inflow fluctuation analysis, followed by regression analysis between them. The results showed that the total inflow value in 2005 - 2020 is fluctuated with the lowest total inflow value of 6862.243 m3/S in 2015 and the highest value of 9296.141m3/S in 2020. Inflow fluctuation from 2005-2020 was included in the low and moderate category. The condition of forest cover in the Sekampung Hulu watershed in 2005-2020 has increased and decreased in each period. Analysis of the relationship between forest cover and inflow fluctuations is a significant with a p-value of 0.092 with a 90% confidence level. The results showed that the condition of forest cover greatly affects the stability of the water availability of the Batutegi Dam.
Adaption strategy of fisherman to climate change: A case study from Limau Sub-District, Tanggamus Regency
Authors: Mutolib A , Rahmat A , Listiana I , Yanfika H , Widyastuti R A D , Riantini M 
Published: May 2022

Abstract
Climate change is a natural phenomenon that occurs all over the world and has a negative impact on many sectors, one of which is the fishery sector. One of the communities that are most vulnerable to the impact of climate change is the fishing community in coastal areas. Fishermen depend on the availability of fish in the sea, as well as the weather and other aspects related to climate and nature. This study aims to identify the fishermen's efforts and adaptation strategies towards climate change. Data collection was carried out from July to August 2020 in Limau Sub-District, Tanggamus Regency with a total respondent number of 80 fishermen households. Respondents were determined through the approach of simple random sampling. The data collected consisted of both qualitative and quantitative data. Data collection was performed through the method of survey, Focus Group Discussion (FGD), and interviews with key informants. Data collected was analyzed using the Qualitative Descriptive approach. The results of the study show that fishermen in Limau Sub-district have made some adaptations to climate change in coastal areas through income diversification, diversification of fishing gear, migration, and social network development among fishermen
The estimated total area of forest fire in Siak Regency, Riau Province during the early period of COVID-19 outbreak
Authors: Mustofa M H , Syaufina L , Puspaningsih N 
Published: May 2022

Abstract
Forest fires in Indonesia are more prominently caused by human factors rather than natural factors. In 2020, the COVID-19 outbreak resulted in social distancing policies which leads to the restriction and limitation of human activities. This research aims to compare the forest fire areas and the number of cases between the early period of the COVID-19 outbreak and the normal period before the outbreak. In this research, we used Sentinel-2 images for further analysis through visual method and Normalized Burn Ratio method. Additionally, the ground check was also carried out in the burnt area. The estimation based on the visual analysis resulted in a total burnt area of 459.71 ha with 4 counts of cases. While based on the NBR result, it was 302.79 ha. For comparison, during the same period in 2019 in the same focus research area, there are 7 forest fire cases with a total burnt area of 1,236.80 ha. These results indicate that in terms of total burnt area and count of cases, there are fewer burnt areas in 2020 compared to the burnt areas in 2019. In conclusion, restrictions on human activity are suspected to be the cause of the reduced area of the fire.
Bird’s species response to the ex-coal mining reclamation stages
Authors: Atmoko T , Nugroho A W , Mukhlisi  
Published: May 2022

Abstract
Birds played an essential role in the life cycle. This study aimed to determine the bird diversity in coal mining reclamation areas with different ages of reclamation plants: one, four, and eight years old, located in East Kalimantan, Indonesia. The bird diversity was determined using two methods: direct observation and capture-released using mist nets. The birds captured by mist nets were identified, and morphometric measurements were conducted. The results showed 26 species of birds found in this study. Birds species were dominated by Blue-throated bee-eater (Merops viridis), Yellow-vented bulbul (Pycnonotus goiavier), Asian-glossy starling (Aplonis panayensis), and Javan myna (Acridotheres javanicus). The bird’s diversity in the reclamation area with four years of reclamation plants was higher than the other areas. However, the number of birds in the reclamation area with eight years of reclamation plants was the highest. Differences in habitat conditions in the three research areas might cause a low similarity index of bird diversity. Javan myna and Yellow-vented bulbul were found in all research sites. In conclusion, pioneer bird species were observed during the early process of post-coal mining reclamation. The existence of cover crops was essential as a source of food for the birds and nests.
Effectiveness of using of brown algae alginate to immobilize the indigenous bioremediation bacteria for reducing waste water from shrimp culture
Authors: Setyawan A , Supono  , Wijayanti A , Anti UT 
Published: May 2022

Abstract

Bacillus coagulans T1.2, an indigenous bacterium from shrimp ponds in East Lampung, has been found to reduce total ammonia nitrogen (TAN). The purpose of this study was to know the effectivity of immobilization of bacterial by sodium alginate from marine brown algae to reduce wastewater pollution from shrimp culture. The brown algae, Sargassum sp. and Padina sp., were collected from Pesisir Barat and Ketapang beach, Lampung. Alginate was extracted from both Sargassum and Padina by alkali method. The bacterial immobilization beads were made by mixed Bacillus coagulans suspension with alginate (1:3 v/v) and formed beads by 1,5 ml syringe without needle. In the in vitro study, the immobilized bacteria were submerged in artificial wastewater (2 beads ml-1) and incubated for 20 days. The control group includes the same bacteria without immobilization. The TAN was measured and the viability of bacteria was evaluated after the incubation period. The results showed that using alginate from Sargassum sp. and Padina sp. as a matrix of immobilization indigenous bacterial Bacillus coagulans effectively and significantly reduce the content of Total Ammonia Nitrogen (TAN) in wastewater. The viability of bacteria immobilized with the alginate of Sargassum sp. and Padina sp. better than the bacterial treatment without immobilization.
Study of Rhodamine B Dyes Content in Snacks of Karuwisi Traditional Market Makassar, South Sulawesi, Indonesia
Authors: Ridjal Andi Tilka Muftiah , Kasma Andi Yulia , Aminullah  , Basri  
Published: May 2022

Abstract
Snack is food that is purchased in a ready-to-consume form and is widely preferred because of its relatively cheap price, easy to obtain, attractive and varied appearance. Rhodamine B dye is one of the colouring substances prohibited for food and is declared as hazardous substance according to Regulation of Health Minister Indonesia No. 722/Menkes/Per/IX/1988 regarding dyes that are declared dangerous and prohibited in Indonesia as well as in the Decree of the Directorate General of POM No. 239/Menkes/Per/V/1985 regarding certain dye stuffs declared as hazardous materials. This study aimed to recognize the levels of Rhodamine B dye in snacks traded. This was descriptive survey research with laboratory examination by analysing Rhodamine B dye on snacks by the results of UV-Vis spectrophotometric method. Population in this study were all snacks marketed in Karuwisi Traditional Market, while the sample was nine snacks consisting of: chili sauce, layer cake, red chocolate cream, red curly crackers, cassava chips, red jelly, red popcorn, cassava crackers, and macaroni crackers because the nine samples were physically identical to Rhodamine B colouring agent, namely the use of a striking red or pink colour. The sampling technique was total sampling. The results revealed that of the nine samples, only one sample was positive for Rhodamine B, namely cassava cracker containing 7.960μg/g. It concluded that red cassava cracker was a wholesale snack at Karuwisi Traditional Market which is positive for Rhodamine B.
Authentication of pure and adulterated Sumbawa monofloral honey using ultraviolet-visible spectroscopy
Authors: Suhandy D , Kusumiyati  , Kuncoro S , Rahmawati W , Yulia M 
Published: May 2022

Abstract
Sumbawa monofloral honey is one of the most expensive honeys in Indonesia. In this present study, ultraviolet-visible (UV-vis) spectroscopy was utilized to discriminate between authentic pure Sumbawa monofloral honey and its adulterated one. The adulterated honey samples were created by intentionally mixing pure authentic Sumbawa monofloral honey with high fructose corn syrup (HFCS) at a level of 10% (v/v). A total of 50 samples of pure and adulterated samples were prepared. The UV-vis spectral data of each sample were obtained by using a UV-vis spectrometer in the range of 190-1100 nm. The result of PCA (principal component analysis) using the first two PCs with the CEV (cumulative explained variance) of 93% shows that the pure and adulterated Sumbawa honey samples could be separated. All pure samples lied in the negative of PC1 (PC1<0) and all adulterated samples were in the positive of PC1 (PC1>0). In conclusion, this result suggested us the possible application of UV-vis spectroscopy for authentication of Sumbawa honey adulterated with HFCS in a simple and low-cost method.
Business models on peatlands to prevent land and forest fires
Authors: Yuniati D , Khotimah H , Lisnawati Y , Meinas H 
Published: May 2022

Abstract
Peatlands nowadays, most of it has been degraded due to land and forest fires. The Indonesian government through The Peatland Restoration Agency has attempted to carry out peat restoration through three pillars. Revitalization is one of the restoration pillars besides rewetting and replanting, it seeks to improve the community livelihoods. The objectives of this study are to identify business models that have developed in the community and to analyze the mechanisms that occur in those business models in preventing forest and land fires. The research was conducted at the Peat Hydrological Unit of Mendahara-Batanghari, Jambi Province. In-depth interviews were conducted with respondents who were obtained by the purposive sampling method. Data and information then were analyzed descriptively qualitatively. Based on the field research this study found that the business models which can prevent forest and land fires are the rice field and horticulture business model, areca nut cultivation and utilization, liberica coffee agroforestry, pineapple cultivation, honey/beekeeping, jelutong agroforestry, ecotourism, and carbon trading. This study concludes that these business models have similar characteristics in preventing forest and land fires, namely land use adjusting the peat depth zoning with native peat species, non-timber forest products, and agroforestry patterns; intensive land management; utilization of biomass so that it does not become fuel during the dry season; maintaining peatlands in humid conditions through water management, and maintaining forest cover.
Community preparedness against the threat of abrasion and tidal floods in Padang City
Authors: Sari Putri Nilam , Purba Yulina Wahyuningrum , Alfian Azyyati Ridha 
Published: May 2022

Abstract
The tidal wave in Padang City resulted in 674 potentially eroded houses by sea abrasion over the next five years. Therefore, it is essential to improve community preparedness. This study aims to analyze the preparedness of coastal communities for the threat of abrasion and tidal flooding. This study used a cross-sectional study design, conducted from January to July 2020. The respondents were 74 inhabitants in Pasie Nan Tigo Village. The results showed that more than a half of the respondents were less prepared to face abrasion and tidal flooding (64.9%), having low knowledge of disaster preparedness (41.9%), low awareness of policies and guidelines concerning abrasion and tidal flooding (77.0%), having low emergency response plans (33.8%), having low disaster warning system (43.2%), and having low resource mobilization (44.6%). The statistical test results showed a relationship between knowledge, emergency response plans, disaster warning systems-resource mobilization, and preparedness. Meanwhile, there was no relationship between policies, guidelines, and preparedness. This study showed that the level of preparedness of coastal communities in the face of abrasion and tidal flooding is still unprepared, the society and government need to improve their disaster readiness by increasing their knowledge of abrasion and tidal floods preparedness in seminars, training, and providing sufficient facilities.
The diversity of plant species in the proboscis monkey’s habitat as a species reference for habitat restoration
Authors: Atmoko T 
Published: May 2022

Abstract
Most of the Proboscis monkey (Nasalis larvatus) habitat is outside the protected area, so the potential for destruction is high. One of the efforts to improve its habitat is habitat restoration. This study aims to determine plant species for proboscis monkey habitat restoration based on reference habitats. The research was conducted at eight locations in East Kalimantan, Indonesia i.e. Kuala Samboja, Mahakam Delta, Suwi River, Ohong River, Berau Delta (mangrove and riverine), Sungai Wain, and Kutai National Park. Vegetation analysis with line-plot sampling method with a total sample of all locations of 11.7 ha. The results showed that the habitat included three main types: mangrove, riverine, and riverine-near coastal. A total of 152 tree species, 41 of which were potential proboscis monkey feed. The highest plant species diversity value was in the riverine forest-Berau Delta of 1.25, while the lowest was in the mangrove forest-Berau Delta of 0.54. Species that are a food source and have good adaptation in riverine habitat are Vitex pinnata, Dillenia excelsa, Garcinia spp, Heritiera littoralis, Ilex cymosa, Cerbera manghas, Hevea braziliensis, and Sonneratia caseolaris. Whereas in mangrove habitat are Avicennia alba, A. officinalis, Bruguiera gymnorrhiza, B. parvifolia, Rhizophora apiculata, and S. alba. They are recommended for habitat restoration.
The potential of kabuyutan sacred natural site towards a sustainable landscape management in Indonesia
Authors: Dahlan M Z , Fukamachi K , Shibata S 
Published: May 2022

Abstract
Sacred natural sites have been recognized by International Union for Conservation of Nature (IUCN) as a landscape heritage that contains biological and cultural diversity due to conserved over generations and sacred by indigenous people. This study identified the characteristics and ecological significance of kabuyutan, a sacred natural site perceived by Sundanese people in West Java Province, Indonesia. The observation participant method was used to gain a close and intimate relationship between Sundanese people and their natural and cultural environment, particularly kabuyutan. We identified 33 kabuyutan and found a typical structure compared to the surrounding landscape which is dominantly covered by dense vegetation and marked by sacred trees, springs, ancestor's graves, or stones. Kabuyutan were perceived to have a vital role in conserving land and water, which is proven by their specific land variables, and proposed a watershed-based management concept. However, we found that changes in the buffer zone of kabuyutan into the agricultural or residential area have potentially affected their existence due to the land ownership status. We suggested that empowering custodians and transferring information about the critical role of sacred natural sites are necessary for landscape management to prevent the negative impact of landscape dynamic.
Purification of selenium-containing leachate in wastewater tanks at a tunnel construction site
Authors: Okazaki K , Kurahashi T , Sakakibara M 
Published: May 2022

Abstract
The leachate containing heavy metals which generated from excavated soil and rock in the civil engineering works appropriate measures are required. We conducted indoor and outdoor experiments to purify heavy metal-containing leachate using a water tank, and proposed a method for treating heavy metals using the purification function of plants at civil engineering works. The plant used was Eleocharis acicularis, which belongs to the Cyperaceae family. The results of the indoor tank experiment on selenium indicated a decrease in the selenium concentration in the leachate from 0.093 to 0.008 mg/L in 14 days. The selenium content per kg of Eleocharis acicularis based on dry weight increased from 0.010 to 0.205 mg, indicating that the plant absorbed selenium. The outdoor tank experiment revealed that the selenium concentration in the leachate decreased from 0.090 to 0.007 mg/L in 21 weeks, and the daily absorption of selenium was 0.0005 mg/L. The lead concentration decreased from 0.004 to 0.001 mg/L in one week, and the arsenic concentration decreased from 0.003 to less than 0.001 mg/L in three weeks. Calculation of the leachate purification cost using Eleocharis acicularis under the current outdoor experiment conditions resulted in a 56% treatment cost reduction compared with the regular treatment cost.
Heavy metals concentration in green macroalgae Spirogyra sp. of Way Ratai River Pesawaran Regency Lampung
Authors: Alhafizoh F , Widiastuti E L , Tugiyono  , Susanto G N , Mumtazah D F 
Published: May 2022

Abstract
The Way Ratai River was affected by heavy metals due to gold and tailings processing activities. Certain metals in high concentrations will be dangerous if found in the environment, including the organisms in them, such as Spirogyra sp. Sampling was carried out at 4 observation stations around the Way Ratai River, and this research was conducted in November 2020 – February 2021. Analysis of metal content was performed by using the ICP-OES. The results showed that the heavy metal content in Spirogyra sp. namely, Ag, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn of station A, B, C were above the predetermined quality standards, but Co content was undetectable. In river water, the content of heavy metals Ag in station A, Cu in all stations, Cd and Fe at in station B-D, Pb in station C, Mn and Zn in station D have exceeded the river water quality standards PP RI No. 22/2021 and ANZECC & ARMCANS 2000. Based on calculating bioconcentration factor (BCF) of heavy metals in Spirogyra sp, accumulation of heavy metals was in high to very high category with the highest BCF value of 159381.643 found for heavy metal Mn at station A.