bluuebunny/crossref_metadata_2025_split huggingface dataset:
Simulations of CO2 multi-temperature vibrational kinetics on the basis of new relaxation time models
Authors: Kosareva A , Kustova E , Mekhonoshina M 
Published: July 2021

Abstract
Vibrational relaxation of a single-component carbon dioxide in adiabatic thermal bath is studied in multi-temperature approaches using several models for the vibrational relaxation time. The energy production terms in two- and three-temperature vibrational energy relaxation equations are written in the frame of the common Landau-Teller model as well using corrections based on introducing multi-temperature relaxation times for various vibrational energy exchanges within and between CO2 modes. For the relaxation time evaluation, two theoretical models for the transition probabilities are implemented: the first-order perturbation theory and the forced harmonic oscillator model; several experimental data sets are also assessed. It is shown that the forced harmonic oscillator model provides satisfactory agreement with experimental relaxation times in a wide temperature range. Solutions obtained using the two theoretical models for the transition probabilities show essentially different trends, incubation time and relaxation rate.
An exact solution for a partially clamped rectangle with a crack
Authors: Kovalenko M D , Menshova I V , Kerzhaev A P 
Published: July 2021

Abstract
The article deals with a boundary value problem for a rectangle whose horizontal sides are rigidly clamped, and the ends are free. In the centre of the rectangle, a vertical cut is made on which a discontinuity of the longitudinal displacements is given. An exact solution to the problem is constructed in the form of series in Papkovich–Fadle eigenfunctions. First, the corresponding boundary value problem for an infinite clamped strip is solved, then the solution for a rectangle is superimposed on this solution, with the help of which the boundary conditions at its ends are satisfied. Examples are given in which discontinuities of three types are considered which differ in the smoothness of the discontinuity contour near its ends.
Investigation of shock wave structure in CO2based on the continuum and DSMC approaches
Authors: Kustova E , Alekseev I , Tan L 
Published: July 2021

AbstractA comparison is made between the continuum and kinetic approaches in studying the shock wave structure in argon, nitrogen, and carbon dioxide. Using the kinetic-theory methods, one-temperature and two-temperature fluid-dynamic equations are derived and closed. Calorically non-perfect gas model is applied, with vibrational energy explicitly calculated. The algorithm for the calculation of transport coefficients including bulk viscosity is implemented. For argon and nitrogen, a good agreement of the solutions obtained using both the continuum approach and direct statistical simulations (DSMC) with experimental results is shown. For carbon dioxide, the one-temperature Navier-Stokes equations do not reproduce non-monotonic temperature behaviour. The two–temperature model yields the results qualitatively similar to those given by DSMC; quantitative discrepancies are however significant. The DSMC relaxation rate strongly depends on the vibrational collision numbers in various CO2modes.
Experimental study and molecular dynamics simulation of carbon nanotubes diffusion
Authors: Rudyak V Ya , Belkin A A , Krasnolutskii S L 
Published: July 2021

Abstract
The diffusion of single-walled carbon nanotubes was studied experimentally and by the molecular dynamics method. The experiments used the dynamic light scattering method. Distributions and average values of diffusion coefficients of molecules of surfactants and nanotubes in nanofluids based on water were obtained. It was found that these distributions, even at low concentrations of nanotubes, can have two maxima corresponding to tubes of different sizes. The effect of centrifugation on the size distribution of nanotubes has been studied. The diffusion of one-dimensional and three-dimensional models of nanotubes in water has been studied by the molecular dynamics method. The velocity autocorrelation functions of of nanotubes of different lengths have been calculated. The presence of a negative region of these functions for small nanotubes has been established. The dependencies of the diffusion coefficient on the length are determined for both models used.
Approaches and collisions of asteroids with the Moon and planets
Authors: Sokolov L L , Balyaev I A , Kuteeva G A , Petrov N A , Eskin B B 
Published: July 2021

Abstract
In this paper we discuss the characteristics of possible collisions of the asteroid Apophis with the Earth. We use the initial conditions published in mid-January 2021 (the nominal orbit NASA), i.e. new observations for Apophis. Estimates of the probability of collisions of dangerous asteroids with planets and the Moon were obtained using the Monte Carlo method.
Forecasting deforestation in the Brazilian Amazon to prioritize conservation efforts
Authors: Jaffé Rodolfo , Nunes Samia , Filipe Dos Santos Jorge , Gastauer Markus , Giannini Tereza C , Jr Wilson Nascimento , Sales Marcio , Souza Carlos M , Souza-Filho Pedro W , Fletcher Robert J 
Published: July 2021

Abstract
As Amazon deforestation rates reach the highest levels observed in the past decade, it is extremely important to direct conservation efforts to regions containing preserved forests with a high risk of deforestation. This requires forecasting deforestation, a complex endeavor due to the interplay of multiple socioeconomic, political, and environmental factors across different spatial and temporal scales. Here we couple high-resolution land-cover maps with Bayesian hierarchical spatial models to identify the main drivers of recent deforestation in the Brazilian Amazon and predict which areas are likely to lose a larger proportion of forest in the next 3 years. Recent deforestation was positively associated with forest edge density, the length of roads and waterways, elevation and terrain slope; and negatively associated with distance to urban areas, roads, and indigenous lands, area designated as protected or indigenous territory, and municipality GDP per capita. From these variables, forest edge density and distance to roads showed the largest effect sizes and highest predictive power. Predictive accuracy was highest for shorter time windows and larger grid sizes. Predicted deforestation was largely concentrated in the North-Eastern portions of the Brazilian Amazon, and amounted to roughly 3, 5, and 6 million hectares for 2020, 2021, and 2022, respectively. About 50% of this predicted deforestation is expected to occur inside protected areas or indigenous lands. Our short-term forecasts can help plan preventive measures to limit deforestation while meeting the specific needs of local areas.
Research on Power Generation and Energy Storage Problems in the Field of Electrical Engineering
Authors: Li Guosheng , Shen Qing , Wang Yang 
Published: July 2021

Abstract
This paper begins with a brief introduction to the “HECT” technology, analyzes the main problems existing in the field of electrical engineering with the “HECT” methods, or from the perspective of “HECT” technology, or by means of “HECT” and some key measures and methods to solve the problems are pointed out. At the same time, many new ideas on power generation and energy storage are put forward. The paper opens up a new channel for the development of electrical engineering technology and its management, which is very creative and eye-opening.
Ganoderma boninense control in palm oil plantations using Trichoderma harzianum in various Media
Authors: Sukariawan Aries , Febrianto Eka Bobby , Sakiah  , Ridho Muhammad , Karnando Doli 
Published: July 2021

Abstract

Ganoderma boninense is a pathogen that can attack palm oil plants. This fungus can cause death, causing a decrease in the number of stands and palm oil production. One alternative to control Ganoderma boninense in palm oil is using the biological agent; ‘Trichoderma harzianum’. This research aimed to examine the inhibition of T. harzianum in various media on different spear leaves accumulations on G. boninense in palm oil plants. The research was arranged in a factorial randomized block design. The first factor was T. harzianum application with different media, the second factor was the accumulation of spear leaves on palm oil trees. The data from the observations were analyzed using the analysis of variance, followed by the DMRT at 5% level. The results of statistical tests showed that the application of T. harzianum in various media had no significant effect on the number of spear leaves at 1.5 months after application (MAA) and G. boninense mycelium at 3 MAA, but had a significant effect on the number of spear leaves at 3 MAA, G. boninense mycelium at 1.5 MAA, T. harzianum mycelium at 1.5 and 3 MAA and also significantly affected the root length at 1.5 and 3 MAA. The accumulation of spear leaves significantly affected at 1.5 and 3 MAA but had no significant effect on the observation of G.boninense mycelium, T. harzianum mycelium and the root lengths at 1.5 and 3 MAA. The interaction between T. harzianum in various media and the accumulation of spear leaves had a significant effect on decreasing the number of spear leaves at 1.5 MAA but had no significant effect on G. boninense mycelium, T. harzianum mycelium and the root lengths at 1.5 and 3 MAA. The application of T. harzianum, which was cultured in various media, was able to reduce the accumulation of spear leaves after 3 months of application. The lowest number of spear leaves was found in T. harzianum application with 25% OPEFB + 75% cow dung compost. The best of T. harzianum media in stimulating palm oil’s root growth was 50% OPEFB + 50% cow dung compost.
Evaluation of the Value of the Defective and Taste of Arabica Coffee (Coffea Arabica L) West Sumatera
Authors: Fadri Rince Alfia , Kesuma Sayuti K , Nazir Novizar , Suliansyah Irfan 
Published: July 2021

Abstract
The purpose of this research is to get information on the value of defectives, water content, taste, and the overall acceptance of Arabica coffee derived from 20 coffee producers in West Sumatera. Taste testing involves trained q grader. The Data of research results analyzed descriptively. The results showed that the quality defectives of coffee is at a quality level from 3 to 5 and 70% quality of coffee in accordance with SNI (Indonesian National Standards) 01-2907-2008. The type of defective in coffee beans is the rupture seeds, brown seeds, black seeds then followed by perforated seeds. Taste of coffee Brew are Excellent Aroma and complex coffee flavor, good acidity and thickness of seeds. Vanilla flavor and taste of fruits and spices. The color of the Arabica coffee powder varies from brown, black and color like cinnamon, As well as overall acceptance kinda like. This indicates the need to implement standard operational procedures to improve the quality of coffee in West Sumatera Framework
Application of Trichoderma as an Alternative to the use of Sulfuric Acid Pesticides in the Control of Diplodia Disease on Pomelo Citrus
Authors: Silvia Mei , Sutarman  
Published: July 2021

Abstract
This study aims to determine the ability of Trichoderma asperellum Tc-Pjn-02 compared to sulfuric acid pesticides in controlling the disease stem rot Diplodia on Pomelo citrus (Citrus maxima) caused by Botryodiplodia theobromae Pat. The research was conducted at Balai Penelitian Tanaman Buah Tropika Kebun Percobaan Kraton-Pasuruan, East Java Province, and the Laboratory of Microbiology and Biotechnology of Universitas Muhammadiyah Sidoarjo in February-April 2020. Trichoderma and sulfuric acid were applied in an aqueous paste formulation each of 10 units of diseased plants with rotten stems which were randomly selected as samples. The data from the observations were tested using the t-test at the real level of 5%. The results showed that Trichoderma sp. had a higher ability in suppressing pathogen attack compared to sulfuric acid which was able to heal rotten wounds on the stalks affected by 41.95% and 26.74%, respectively.
Reproductive characters of hampala fish (hampala macrolepidota kuhl & Van Hasselt, 1823), correlation with body length
Authors: Suryaningsih Suhestri , Sukmaningrum Sri , Amurwanto Adi , Rofiqoh Aswi Andriasari 
Published: July 2021

Abstract
Hampala macrolepidota Kuhl & van Hasselt, 1823, known as Hampala barb or Hampala (Java), have habitat in rivers, lakes and reservoirs. Hampala barb is a member of Cyprinid family, that has an economical value, but it has not been cultivated, its entirely catch from their natural habitat. To anticipate the over need excessive exploitation of domestication efforts. The success of these efforts require a lot of information, one of which is the character of reproduction. This study aims to determine the analysis of multiple characters that include the reproduction of fish trough Gonado Somatic Index (GSI), and fecundity correlated with total length. The research method is survey, fish samples obtained every month, with a simple random sampling technique. The data are carried out by statistical analysis of the correlation between Somatic Gonado Index fund fecundity, with the total length. The results showed that the correlation between IGS male with a body length were positively correlated (r = 0.602), as well as on the female were positively correlated (r = 0.696). Fecundity ranged from 39240-256080 eggs, between fecundity with total length were positively correlated (r = 0.729).
Microbial fuel cell based biocatalyst from traditional market waste water for energy production
Authors: Mardiana Ummy 
Published: July 2021

AbstractMicrobial Fuel Cell (MFC) based on bacteria from Cikurubuk Traditional market waste water has been applied for energy production. We have been observed that there were some potential of microorganims could be applied as renewable source of energy in term of electricity production. A traditional market plays a major role in socio-economics and constitutes a significant aspect of Indonesian culture. One of the major contributors to domestic pollution is a pollution from wastewater traditional market which is containing organic substance and nutriens. This conditions if not properly solved can causes seriously harm the human health and environment. The objective of this study is to develop the waste water treatment technology without energy supply by using the potential activities of microorganism through microbial fuel cell system. We have been determined some biocatalysts from biofilm at the surface of anode. To provide the results some characterizations have been conducted usingChronoamperometry. The optimization of anode conditions have been also studied to maintenance the long performance of MFC. Results confirmed that the biocatalyst activities could be a promising renewable source for energy production and very suitable as an alternative technology based green chemistry technology.
Lithofacies Association of Fluvial Deposit, Walat Formation in Cibadak Area West Java
Authors: Hafiz S D , Firman H , Ramadhan A , Koesmawardhani W T 
Published: July 2021

Abstract
Heterogeneities in fluvial sediment sufficiently vary characteristics based on the sedimentology aspect. The sedimentology analysis is the most important parameter to interpret fluvial architecture. Texture variations and sedimentary structures can define and describe where this sediment was deposited. Walat Formation is one of the fluvial deposit is situated in West java. Based on the observation locations that were carried out, it can be seen the outcrop profile, texture, and sedimentary features of this formation. The first observable lithofacies in this area is facies Gm, wherein this facies comprises pebble or cobble gravel with graded bedding, gravel imbrication, and ripple mark. The second one is facies Gp which comprises gravel stratified with planar cross-beds. The third is facies St, medium to very coarse-grained sandstone with laminae and cross-bed. The fourth is facies Sm, which consists of very fine to coarse-grained sandstone with ripple mark and climbing ripple. Furthermore, facies F1 and C comprises interbedded of sandstone, silt shale, and coal with bioturbation, ripple, and undulatory bedding. The fifth, facies Sh which consists of very fine to very coarse sandstone with sedimentary structures is horizontal lamination. The last but not least, facies Ss comprises fine to coarse sandstone with sedimentary structures small scale scours and cross stratification.
Climate Village Program for Climate Change Adaptation and Mitigation for Green Villages
Authors: Herdiansyah Herdis 
Published: July 2021

Abstract
Climate change has become an issue that is hotly discussed by all countries in the world. Indonesia is included in it and has committed to adapt and mitigate this issue, and specifically set a target of reducing greenhouse gas emissions by 29% from business as usual levels. One of the priority areas for climate change adaptation and mitigation is Jambi Province. Floods and droughts are a few examples of the impacts of climate change. In addition, waste management and inaccurate waste are one of the factors that trigger climate change and public health problems. As an adaptation and mitigation effort on these problems, it is necessary to strengthen and disseminate community resilience to face climate change. Furthermore, community knowledge and skills capacity building for climate change adaptation and mitigation is carried out. Activities are carried out in efforts to adapt and mitigate climate change by holding several activities. These activities include socialization of strengthening community resilience to climate change, strengthening village policies in the context of climate change mitigation, mentoring and training in rainwater harvesting and water saving, tree planting and urban farming, and strengthening the concept of “zero waste” in waste or solid waste management. The purpose of these activities is to provide assistance and training to communities in Tangkit Village, Sungai Gelam District, Muaro Jambi Regency, Jambi Province to increase the capacity of knowledge and skills in adaptation and mitigation efforts to create a green village.
Soybean production response: A study of Jambi’s acreage response under policy program
Authors: Edison  , Renate Dharia 
Published: July 2021

Abstract
Research purpose was to analyse effect of agricultural business in soybean crop. Effect government policy program has be seen through high trend of soybean production in Jambi for three decade (1986-2018). Those policy programs include support price, also input subsidy programs. Differentiation on input acreage, yield, also output has been affected by input price like fertilizer price. Successfulness policy programs can be seen through crucial indicator among important coefficients of policy programs. In some research result, it can be found some policy implications. The first policy implication stated that price support policy is much credible also important for program improvement. Impact of this program of soybean is crucial to analyse response production. In analysing acreage response, method of measuring price expectation is used when variation of market phenomena was affected by price support. Then, results also found that if support price is low from riel price, truncation effect has no effect and price support program has low effect on acreage decisions. On other hand, if price support rate is high, truncation effect is getting higher, and it is much better impact to make acreage decisions. Price soybean elasticity was 0.091 also 0.105 for short-run acreage response and long run respectively. Moreover, it was acceptable on economic and statistical aspects.
The Development of Communication Model for the Empowerment of Highly Poor Villages in Pangandaran Regency, West Java, Indonesia
Authors: Yustikasari Y , Gemiharto I , Ayuningtyas F 
Published: July 2021

Abstract
Indonesia, as a developing country, still faces a never-ending problem of poverty. The effects of various development programs aimed at reducing poverty levels of Indonesia are only temporary. The number of poor in Indonesia has been fluctuating from year to year. It suggests that a new approach to overcoming poverty, especially in rural areas that estimated 67 percent of the poor in Indonesia, is required. The Government of Indonesia pays special attention to villages with high poverty levels or Highly Poor Villages. Reducing poverty in Highly Poor Villages requires different approaches because the population of each highly poor village is economically fragile and only depend on the government’s assistance. This study seeks to examine how a communication model for community empowerment is more suitable for residents in Highly Poor Villages. The purpose of this study is to determine and analyze how the communication model for community empowerment is more ideal for residents in the Highly Poor Villages, particularly in Pangandaran Regency. This study employed a descriptive qualitative method. The data collection techniques of this study were in-depth interviews and literature studies. Meanwhile, Focus Group Discussions (FGD) was used to validate the findings in the field. The informants of this study were all stakeholders, village government officials, and the poor affected by the community empowerment policy. To analyze the data, this study employed three steps: data reduction, data presentation, and conclusion drawing. This study concludes that the empowerment of the highly poor people can be conducted independently by several existing community groups, such as majelis taklim, PKK cadres, Posyandu cadres, etc. in various training and skills activities such as cooking class, craft production, sewing, and micro-businesses management initiated from the training results.
The government policy on the covid-19 handling viewed from environmental and biodiversity perspectives
Authors: Akhmaddhian Suwari , Supartono Toto , Yuhandra Erga , Budiman Haris , Rahmat Diding 
Published: July 2021

Abstract
This legal analysis aims to analyze the government policy on the Covid-19 handling viewed from the environmental and biodiversity perspectives. This study applied a normative juridical research method. The results showed that Large-Scale Social Restriction policy makes the environment and biodiversity better as the industrial and economic activities stop temporarily and the production activities stop exploiting the environment. Finally, it can be concluded that the government policy in the form of Large-Scale Social Restriction has positive impacts on the environment and biodiversity in several places, especially in urban areas, so that the policy can be applied in the future.
The effect of maggots lentera flies (hermetia illucens) growing media as the solution of using organic waste
Authors: Herlina Nina , Nurdin  , Yudayana Bambang , Nasihin Iing , Nurlaila Ai 
Published: July 2021

Abstract
Waste is not only a complex problem in big cities, but in several villages it can become an environmental problem that must be addressed immediately. Organic waste that has not been managed properly will result in a source of pollution. However, several ways can be done to deal with this problem, including activities to recycle organic waste with the method of decomposing waste using maggot larvae (BSF). This study aims to determine the growth off maggot by treating different types of waste media and containers on maggot growth. The method used was an experimental method with completely randomized design with 3 levels of treatment of the size the container used. The results showed that the highest weight of maggot was produced from container 2, namely a mixture of organic waste and tofu dregs of 4,250 grams with an average of 1,417 grams. The type of waste media had a significant effect on the maggot weight (P=0,001), while the size of container had no significant effect on the maggot weight (P=0,387)