bluuebunny/crossref_metadata_2025_split huggingface dataset:
DFT study of structural, electronic, thermoelectric and elastic properties of KPdX3 (X = F, Cl, Br, and I) perovskites
Authors: Shafiullah Muhammad , Haq Saeed Ul , Muhammad Raz , Faizan Muhammad , Laref Amel , Derafa Wassila , Sohail Amir , Khesro Amir , Samad Abdus 
Published: April 2023

Abstract
Over the last two decades, perovskites have attracted researchers’ attention due to their fascinating physical properties for different components in the electronic industry. Here, we have investigated the electronic structure and thermoelectric properties of KPdX3 (X = F, Cl, Br, I) perovskites using Density Functional Theory (DFT). Initially, the structure of all the compounds was relaxed, and the optimized lattice parameters were obtained using the PBE functional. The phonon dispersion spectrum obtained for all compounds indicated a dynamically stable nature for these perovskites. The analysis of the electronic band structure showed metallic nature for KPdX3. The calculated elastic properties offer elastic stability and ductility for KPdX3. The appropriate values of thermoelectric parameters show the potential of these KPdX3 for thermoelectric applications. Moreover, the thermoelectric performance of these compounds can be further improved by tuning the thermal conductivity by selecting an appropriate cation as a dopant. The thermoelectric properties of KPdX3 can guide future experimental and theoretical studies.
Weak electron-phonon renormalization effect caused by the counteraction of the different phonon vibration modes in FeS2
Authors: Li Yunxiu , Ning Jinyan , Xi Jinyang , Wang Shenghao , Yang Jiong 
Published: April 2023

Abstract
Fluctuations on operating temperatures of solar cells may change the electronic structures of absorption layer materials, which will have a profound influence on the photoelectric conversion efficiency. Based on the electron-phonon renormalization (EPR) method, we investigate the temperature dependence of the band gap of optoelectronic pyrite FeS2. The zero point renormalization (ZPR) on the band gap of FeS2 is less than 100 meV, while the vibration-induced band gap reduction is even less than ZPR within the temperature range 0 ∼ 600 K. The fitted Varshni coefficients have agreement with the experimental result. The relatively small reduction of the band gap by the vibrations can be rationalized by the counteraction of the different phonon modes with opposite influences on the EPR effect. By analyzing the mode-decomposed EPR, we reveal that the shortening of the S-S bond caused by the tilting of FeS6 octahedral (A

g
phonon mode) is responsible for the increase of the band gap. On the other hand, the change of the Fe-S bond length (T

u
phonon mode) reduces the band gap value. Our work reveals the theoretical understanding of the weak EPR effect in pyrite FeS2.
Module representatives for refining gene co-expression modules
Authors: Mankovich Nathan , Andrews-Polymenis Helene , Threadgill David , Kirby Michael 
Published: April 2023

Abstract
This paper concerns the identification of gene co-expression modules in transcriptomics data, i.e. collections of genes which are highly co-expressed and potentially linked to a biological mechanism. Weighted gene co-expression network analysis (WGCNA) is a widely used method for module detection based on the computation of eigengenes, the weights of the first principal component for the module gene expression matrix. This eigengene has been used as a centroid in a k-means algorithm to improve module memberships. In this paper, we present four new module representatives: the eigengene subspace, flag mean, flag median and module expression vector. The eigengene subspace, flag mean and flag median are subspace module representatives which capture more variance of the gene expression within a module. The module expression vector is a weighted centroid of the module which leverages the structure of the module gene co-expression network. We use these module representatives in Linde–Buzo–Gray clustering algorithms to refine WGCNA module membership. We evaluate these methodologies on two transcriptomics data sets. We find that most of our module refinement techniques improve upon the WGCNA modules by two statistics: (1) module classification between phenotype and (2) module biological significance according to Gene Ontology terms.
Impact of asymmetric activity on interactions between information diffusion and disease transmission in multiplex networks
Authors: Xie Xiaoxiao , Huo Liang’an , Zhao Laijun , Qian Ying 
Published: April 2023

Abstract
Disease is a serious threat to human society. Understanding the characteristics of disease transmission is helpful for people to effectively control disease. In real life, it is natural to take various measures when people are aware of disease. In this paper, a novel coupled model considering asymmetric activity is proposed to describe the interactions between information diffusion and disease transmission in multiplex networks. Then, the critical threshold for disease transmission is derived by using the micro-Markov chain method. Finally, the theoretical results are verified by numerical simulations. The results show that reducing the activity level of individuals in the physical contact layer will have a continuous impact on reducing the disease outbreak threshold and suppressing the disease. In addition, the activity level of individuals in the virtual network has little impact on the transmission of the disease. Meanwhile, when individuals are aware of more disease-related information, the higher their awareness of prevention will be, which can effectively inhibit the transmission of disease. Our research results can provide a useful reference for the control of disease transmission.
Design and testing of an electromechanical engine for a small solid-propellant rocket using non-metal materials
Authors: Olivar C V , del Rio J L 
Published: April 2023

Abstract
In this paper an engine prototype of 2 degrees of freedom from a work still in progress that helps a solid fuel rocket to stay vertical during motor operation is presented. One of the philosophies of this paper consists in using cheap and accessible materials, as well as avoiding the use of industrial machinery for its manufacture. This paper describes the procedure to generate solid fuel from a mixture of sugar and potassium nitrate. Subsequently, the design of the engine and tests conserning reusability with the prototype are presented. The design is based solely on obtaining the torques required to keep the prototype rocket moving in a vertical direction. The corresponding equations are written and after linearization, the transfer function is presented and the system is simulated using a PID control. The electromechanical system (ES) as well as the solid fuel motor were manufactured, and even though the ES is not coupled to the motor so the control actions are not evaluated, the performance of the rocket motor is measured using different design options and the propulsion times were evaluated. To measure the orientation and position the BMP280 and MPU6050 sensors were selected, and their stabilization time after turning them on was evaluated. It was found that the materials can be reused at least once for tests up to 23 grams of solid fuel, and that the selected electronic devices must have a stabilization time before ignition.
Teletraffic analysis and simulation on FSO systems: the traffic generators approach
Authors: Gutiérrez-Montor M , Yañez-Casas G A , Enríquez-Ortiz C E , Hernández-Gómez J J 
Published: April 2023

Abstract
Free Space Optical Communications (FSO) has become an interesting topic to researchers in recent years since the amount of data generated by devices is growing, and it is necessary to use data links that support high bandwidth to transmit them from one device to another. This technology is used to establish not only terrestrial links but also space links.
A CubeSat satellite is generally deployed in the Low Earth Orbit (LEO) region. To maintain the altitude, the satellite must have a high orbital speed. For that reason, the time to transmit data between a particular ground station and the CubeSat satellite is limited. On the other hand, the volume, mass, and energy storage capacity are restricted in a CubeSat. The greater the bandwidth capacity of radio frequency links, the greater the demand for volume, mass, and energy they require. For that reason, to transmit a significant amount of data, traditional radio frequency links are not suitable and are becoming replaced by FSO as technology improves.
Despite research in physical layer technologies on FSO (modulation schemes, error mitigation techniques, pointing and tracking systems), there is very little research in the literature about data link layer protocols for FSO. Secondly, there is little research to measure the data traffic demand on CubeSat satellites so that a certain data link layer protocol can be selected or adapted to be implemented in an FSO system.
This paper presents research to address the issue of teletraffic through the use of traffic generators. The result is the design and development of a traffic generator for a discrete event simulator that will later be used to observe the behavior and to measure the performance of the Selective Repeat ARQ protocol in a simulated satellite FSO link, in order to propose improvements to adapt the protocol to this scenario.
Identification of lithological characteristics on glacial sediments using a micromechanics approach
Authors: Meléndez-Martínez J 
Published: April 2023

Abstract
To identify the lithology present along the 1138 m length of the AND-2A drillcore; compressional wave velocity Vp
and wet bulk density ρWBD
data sets acquired on the drillcore are portrayed on density-velocity Rock Physics Templates (RPTs) constructed using a Self-Consistent (SC) micromechanics approach. The three most abundant minerals present in the drillcore— quartz, calcite, and mixed clays —as well as the pore fluid (brine), served as the initial values for the SC model. Results are then compared with the lithology that is identified using Gardner density-velocity cross plots. Thus, the principal lithologies found in the AND-2A drillcore have already been mentioned in the scientific works, and results from both the Gardner and SC approaches show a good correlation with these lithological features. When compared to the lithology of six specific rock specimens that were acquired at various depths along the AND-2A drillcore, our findings likewise match up well. These findings imply that the suggested SC technique may be useful for identifying lithology in boreholes where downhole physical characteristics could exist during intervals when the drillcore was not recovered in whole. Additionally, the SC approach is helpful even when physical properties are derived from measurements because lithology can occasionally be problematic to estimate from visual examination alone, and supplementary evidence from the evaluation of the physical properties could offer further understanding.
Spatial distribution of socio-demographic and housing-based factors in relation to flash and slow-rise flooding hazards in the U.S
Authors: Oke Oluwatobi , Dougherty Erin , Rasmussen Kristen L , Morrison Ryan R , Carter Ellison 
Published: April 2023

Abstract
Previous studies have drawn attention to racial and socioeconomic disparities in exposures associated with flood events at varying spatial scales, but most of these studies have not differentiated flood risk. Assessing flood risk without differentiating floods by their characteristics (e.g. duration and intensity of precipitation leading to flooding) may lead to less accurate estimates of the most vulnerable locations and populations. In this study, we compare the spatial patterning of social vulnerability, types of housing, and housing tenure (i.e. rented vs. owned) between two specific flood types used operationally by the National Weather Service—flash floods and slow-rise floods—in the floodplains across the Contiguous United States (CONUS). We synthesized several datasets, including established distributions of flood hazards and flooding characteristics, indicators of socioeconomic status, social vulnerability, and housing characteristics, and used generalized estimating equations to examine the proportion of socially vulnerable populations and housing types and tenure residing in the flash and slow-rise flood extents. Our statistical findings show that the proportion of the slow-rise flooded area in the floodplains is significantly greater in tracts characterized by higher percentages of socially vulnerable. However, the results could not confirm the hypothesis that they are exposed considerably more than less vulnerable in the flash flooded floodplains. Considering housing-occupancy vulnerability, the percentage of renter-occupancies are greater in the flash flood floodplains compared to slow-rise, especially in areas with high rainfall accumulation producing storms (e.g. in the Southeast). This assessment contributes insights into how specific flood types could impact different populations and housing tenure across the CONUS and informs strategies to support urban and rural community resilience and planning at local and state levels.
Thermally driven elastic membranes are quasi-linear across all scales
Authors: Steinbock Chanania , Katzav Eytan 
Published: April 2023

Abstract
We study the static and dynamic structure of thermally fluctuating elastic thin sheets by investigating a model known as the overdamped dynamic Föppl–von Kármán equation, in which the Föppl–von Kármán equation from elasticity theory is driven by white noise. The resulting nonlinear equation is governed by a single nondimensional coupling parameter g where large and small values of g correspond to weak and strong nonlinear coupling respectively. By analysing the weak coupling case with ordinary perturbation theory and the strong coupling case with a self-consistent methodology known as the self-consistent expansion, precise analytic predictions for the static and dynamic structure factors are obtained. Importantly, the maximum frequency

n

max

supported by the system plays a role in determining which of three possible classes such sheets belong to: (1) when

g
≫
1

, the system is mostly linear with roughness exponent ζ = 1 and dynamic exponent z = 4, (2) when

g
≪
2

/

n

max

, the system is extremely nonlinear with roughness exponent

ζ
=
1

/

2

and dynamic exponent z = 3, (3) between these regimes, an intermediate behaviour is obtained in which a crossover occurs such that the nonlinear behaviour is observed for small frequencies while the linear behaviour is observed for large frequencies, and thus the large frequency linear tail is found to have a significant impact on the small frequency behaviour of the sheet. Back-of-the-envelope calculations suggest that ultra-thin materials such as graphene lie in this intermediate regime. Despite the existence of these three distinct behaviours, the decay rate of the dynamic structure factor is related to the static structure factor as if the system were completely linear. This quasi-linearity occurs regardless of the size of g and at all length scales. Numerical simulations confirm the existence of the three classes of behaviour and the quasi-linearity of all classes.
Material Flow and Waste Recovery in a Community-Based Waste Management System in Batu, Indonesia
Authors: Muktiningsih Satwika Desantina , Sekito Tomoo , Rahmaudina Sindi , Dote Yutaka , Prayogo Tri Budi 
Published: April 2023

Abstract
Indonesian government has promoted to establish Community Based Waste Management (CBWM) in Indonesia to increase the resource recovery rate and to reduce the amount of landfilling waste in stead of conventional the waste management. In CBWM, recyclable materials are recovered by neighborhood communities and only the residual waste is landfilled. Although CBWM can contribute to the reduction of green house gas emission and conservation of resources, the effectiveness of CBWM on the reduction of waste is an clear due to a lack of detailed information about CBWM such as economic benefit, waste flow and its sustainability. The aims of this study are to identify the waste flow in common CBWM in Indonesia and to evaluate the effectiveness of CBWM for reduction of MSW carried to a landfill site. The TPS3R Dadaprejo Mandiri (DM-TPS) in Dadaprejo Village, Batu City, Indonesia was investigated as a case of CBWM. Waste composition was surveyed for 8 consecutive days on three separate occasions in 2021 and 2022. Each resource was weighed and measured at each step of the process to analyze waste flow. Monthly data summarizing the amount of each resource separated at DM-TPS was obtained from their records. Information about the amount of waste and resources collected by the 13 waste banks was obtained by interviewing the administrators of those waste banks. The amount of waste carried to DM-TPS during the first, second, and third surveys averaged 5.61, 6.65, and 5.40 t/day, respectively. Of the 9 categories of waste, the largest was the organic waste. Fruits and vegetables made up the largest percentage of resources followed by plastic bags. The average resource recovery rate was approximately 15.2%. However, the composition survey revealed that the potential resource recovery rate was approximately 39.5%. In order to increase of resource recovery rate, the corporation of households on simple source separation at home would be required.
Utilization of quantile mapping method using cumulative distribution function (CDF) to calibrated satellite rainfall GSMaP in Majalaya watershed
Authors: Burnama Nabila Siti , Rohmat Faizal Immaddudin Wira , Farid Mohammad , Wijayasari Winda 
Published: April 2023

Abstract
Flooding is a major problem in Indonesia, with a need for a more data-driven model to understand the sources of floods and potential measures. As ground-based data availability and quality are major sources of uncertainty in flood modeling in such a developing country, satellite-based data is one significant option to complement the drawbacks of ground-based data. The data available from the satellite data still needs to be calibrated with the ground-based observation data. This research uses satellite rainfall data from GSMaP (Global Satellite Mapping and Precipitation) by JAXA and the quantile mapping method to calibrate the satellite rainfall data with local rainfall observation. The quantile method is a bias correction method frequently used for precipitation and temperature variables. This method investigates the bias in regional satellite rainfall data and local rainfall observation. The satellite and ground-based data scales are changed to quantiles or percentiles to calculate the correction factors. The quantile mapping method aims to determine the closely fitted CDF curve between the satellite and the ground-based rainfall data. The study area is Majalaya, one of the regencies in West Java known as the metropolitan city for the textile industry and agriculture center. The Quantile Mapping method successfully calibrated the GSMaP rainfall data in Majalaya with an R2 of 0.996. This research can solve the problem of rainfall data in Indonesia and can further be developed for other purposes, such as flood analysis and prediction.
In Vitro Growth of Dendrobium stratiotes on Various Medium and Growth Regulator
Authors: Purwanto E , Arniputri R B , Handoyo G C , Yunus A , Samanhudi  , Purnomo D , Sakya A T , Rahayu M , Setyawati A , Brimantara F 
Published: April 2023

Abstract

Dendrobium stratiotes is one of orchids that is in demand because its flower diameter is larger than others. But now it is rarely found in nature and least available compared to other orchids. This exacerbated by climate change that supports the scarcity. Therefore, in vitro propagation is one of solution This study aims to evaluate the effect of several types of medium, PGR, and their interaction to in vitro growth. This research was designed in completed randomized design (CRD) with two factors. The first factor is medium type there are VW, ½ MS, Growmore, and AB-MIX. The second factor is the type of PGR there are 0 (without PGR), BAP, IAA, combination of BAP+IAA, BA, NAA, combination of BA+NAA, all with a concentration of 1 ppm. The growth monitoring was conducted for 2 months. The results showed that the use of ABMIX without PGR produce significants effect to plant height, Growmore with NAA produce significants effect to number of roots, ABMIX with BAP+IAA produce significants effect to number of leaves. Medium, PGR, and interaction between the both did not give significant effect on plant weight. The ABMIX without PGR was able to resulted most notable treatment than others.
Use of Trichoderma as an Effort to Increase Growth and Productivity of Maize Plants
Authors: Syamsiyah Jauhari , Herdiansyah Ganjar , Hartati Sri 
Published: April 2023

Abstract
Climate change is one of the obstacles that must be faced in agricultural development because it impacts decreasing soil fertility and agricultural productivity. Therefore, efforts are needed to maintain and even increase productivity, one of which is utilizing microorganisms that function as biological fertilizers to keep the soil environment and support the expected results. This study aims to examine the potential of Trichoderma in increasing the growth and productivity of maize plants. This research was conducted using the Randomized Block Design method, nine treatments (A= Control, B= standard NPK, C=¼ NPK + 1 PT, D=½ NPK + 1 PT, E=¾ NPK +1 PT, F= 1 NPK + 1 PT, G=¾ NPK + PT, H=¾ NPK + PT, I=¾ NPK + PT) with three replications, so there were 27 experimental plots. The results showed that using Trichoderma accompanied by NPK fertilizer affected increasing plant growth (plant height, number of leaves, and stem diameter) and maize plants. The use of Trichoderma at various doses can increase the productivity of maize plants.
Growth and Yield of Black Rice M4 Induced by Gamma-Rays 200 Gy Under Drought Stress
Authors: Purwanto E , Parjanto  , Mustikasari W A , Awanis S 
Published: April 2023

Abstract
Black rice (Oryza sativa L. indica) is a functional food with high anthocyanin and dietary fiber content. Drought conditions due to significant climate change can reduce black rice production. Mutation induction using gamma-rays is among the popular approaches to plant improvement with increased genetic variability for breeding. The research aims to determine the growth, yield, and obtain drought-tolerant mutant black rice. This study used a field experiment method. It planted four selected mutant lines and control plants for each local black rice variety, Bantul, and Boyolali. The results showed that drought stress degraded growth and yield character, such as plant height, shoot dry weight, the number of productive tillers, percentage of filled grain, and inhibited flowering age. Resistance evaluation to drought stress used the stress sensitivity index (SSI). M4-By-200-01, M4-By-200-04, and M4-By-200-04 lines could become short-stemmed black rice and were tolerant to drought stress.