Miracle-dz/UniFAR-FTUs huggingface dataset:
Comparison of physical-chemical attributes in different areas with gullies from Brazil Novo municipality – PA, Brazilian Amazon

With the agricultural activities occurrence developed in Brazil Novo municipality, Pará, in the Brazilian Amazon, the soils show degradation and compaction, deriving from the inappropriate management of this natural resource. The objective of this research was to evaluate through the data systematization of physical and chemical atributes from studies carried out, involving Permanent Preservation Areas, Pasture and Natural Regenaration, in areas with gullies presence in the Brazil Novo county – PA. Deformed and undeformed samples were collected in all the studied areas to determine the physical and chemical properties of the soil in Pasture (A – high area), Permanent Preservation Area (B – low area) and Natural Regeneration (C – intermediate area), in all points (A, B and C) land’s topography (slope) and vegetation cover was considerated. In the statistical analysis it was observed that there is no significant difference for Research, Society and Development, v. 10, n. 5, e56810515267, 2021 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi. org/10.33448/rsd-v10i5.15267 2 the studied layers (0-20 and 20-40 cm), when evaluated the two studied gullies for the three areas, accepting in this way the nullity hypothesis (H0). The soils were classified as halics with low content of organic matter in Natural Regeneration areas. It is noteworthy that the isolation action of Gully 1(V1) contributed to the natural regeneration, while in Gully 2 (V2) it is necessary anthropic intervention, since it was not made any mitigation procedure from the environmental impacts promoted to the soil natural resource.
Taxation and Dividend Payout: The Case of the Republic of Serbia

* Corresponding author: Stefan Vržina, e-mail: stefan.vrzina@kg.ac. rs Research Question: The paper investigates the relationship between taxation and dividend payout decisions of companies in the Republic of Serbia. Motivation: Including taxation in dividend policy discussion may allow for better understanding of decisions of companies to pay dividends. Prior worldwide research results on the impact of taxation on dividend policy are inconclusive, often contradicting and cannot be universally accepted. Despite abundant research in previous decades, the key drivers of dividend policy of companies are still unknown and there exists a so-called dividend puzzle. In addition, the research on dividend policy of companies in transition countries (including the Republic of Serbia) is relatively scarce. On the other hand, research in transition countries is important as transition countries have a significantly lower level of capital market efficiency and liquidity, having a lower number of joint stock companies and a lower number of companies that regularly pay dividends. Idea: Since tax burden may be a significant obstacle for companies to pay dividends, it may be relevant to research into whether corporate income tax burden has an impact on dividend payout ratio of companies, as well as the impact of dividend tax that shareholders have to pay on the dividend payout. Data: The study captured 23 companies listed on the Belgrade Stock Exchange between 2013 and 2018 that paid dividends in at least one year. In total, the research involved 92 dividend payouts. Research data have been retrieved from the Business Registers Agency of the Republic of Serbia. Tools: Research hypotheses are tested using EViews and IBM SPPS software. Statistical methods included descriptive statistics, correlation and regression analysis, as well as non-parametric statistical tests for independent samples. Findings: The analysis shows that corporate income tax does not impact a dividend payout ratio of companies, indicating that companies do not consider the corporate income tax when deciding on dividends, mostly due to the effective tax rates being considerably lower than the statutory tax rate of 15%. Also, statistical tests show that the dividend tax does not impact the dividend payout ratio, as there is no significant difference in the dividend payout ratio between companies whose largest shareholder is high taxed and companies whose largest shareholder is low taxed. Contribution: Research results may be of interest for company management when designing the dividend policy as well as for investors when deciding on shares investment in accordance with their tax preferences.
Sulfonated alumina: A suitable catalyst for furfural biomass building-block valorization through multicomponent reactions

Sulfonated alumina was synthetized and tested for the first time in furfural valorization through a multicomponent reaction for the preparation of a nitrogenated heterocyclic compound containing the furan substructure. Ten polysubstituted heterocycles, belonging to the dihydropyrimidinones (thiones) and 1,4-dihydropyridines, were obtained with very good yields (70% 85%) using the tandem methodology and green reaction conditions. The catalyst was easily separated from the reaction medium, giving a high yield in the reusability studies. Green metrics were analyzed in order to consider the reaction suitability.
The extracted sulforaphane from cabbage ameliorates liver functions in rats with diethyl nitrosamine induced hepatotoxicity

1 Biochemistry division, Department of Chemistry, Faculty of science, Zagazig University, Egypt 2 Department of Chemistry, Faculty of science, Zagazig University. Egypt 3 Department of Chemistry, Biochemistry division, Faculty of science, Tanta University. Egypt 4 Department of Biochemistry, Faculty of science, King Abdulaziz University, Jeddah, Saudi Arabia A R TI C L E I N FO A B S TR A C T Article history: Received : 21/2/2021 Accepted : 6/4/2021 Available online :
Reproductive and cost assessment of a seasonal breeding program with Bos indicus in tropical Mexico

Objective. To compare the reproductive performance of postpartum and open Bos indicus cows and to study the cost effectiveness of retaining non-pregnant animals after a short breeding season in tropical region of Mexico. Material and Methods. A total of 128 Bos indicus were included, 87 postpartum cows (PP) with ≤90 days after calving and 41 open cows (OC) with >90 days open. The study was divided into three phases: 1) Estrus synchronization followed by FTAI (day 0-10), 2) Estrus detection and AI (day 11-45) and 3) Natural mating (day 46-90). For the first phase, all animals were synchronized and AI at fixed time (day 10). Cows displaying overt signs of estrus (day 11-45) were AI. Open cows during the previous two phases were exposed to the bull. Results. Pregnancy in phase 1 was different (p<0.01) for PP and OC groups, 58.6% and 34.1%, respectively. Overall pregnancy percentage over the second service was 42.5% (p>0.05). No differences (p>0.05) were observed at phase 3, average 44.2%. By the end of the breeding season, the cost of OC, was 3 times more than PP cows. Conclusions. Pregnancy rate at first phase was higher in PP cows than OC cows. At the end of breeding season, a pregnancy rate of 80% was found. Incorporation of open cows from previous breeding season was more expensive than PP cows in all phases of the breeding program. Retaining an open cow for rebreeding one year or more could not be economically feasible.
Students’ and teachers’ attitude towards online classes during Covid- 19 pandemic: A study on three Bangladeshi government colleges

In this paper, students, and teachers' attitudes towards shifting to an entirely online learning environment were assessed due to COVID-19. The main objective of the study was to investigate the students’ and teachers' attitudes towards Online learning during the COVID-19 situation in Bangladeshi Government Colleges. Findings revealed that cost and time-effectiveness, safety, convenience, and improved participation were the most frequently cited positive aspects of the online learning experience, while distraction and reduced focus, heavy workload, problems with technology and the internet, lack of ICT knowledge, and poor network infrastructure, limited availability of educational resources, low attendance of learners, uncooperative learners and insufficient support from instructors and colleagues were the most recurrent negative aspects. The qualitative and quantitative research method was adopted, with semi-structured interviews conducted via Zoom with 10 College teachers and Focus group discussion conducted via Zoom with 18 and survey 100 college students via Google platform from three Bangladesh renowned Government College from Hons 1st year to masters’ level located in Rajshahi divisional district town of the country. A sample of these essays was analyzed using open coding. The findings of the study help instructors and institutions understand students’ and Teachers' attitudes regarding online teaching & learning under abnormal circumstances. Several recommendations informed by the interpretation of the participants’ feedback are offered to assist instructors, administrators, and policymakers improve future online learning experiences. After conducting the whole study, it can be said that though have some problems adapting to online classes in three regarding BGCs colleges affiliated to the National University of Bangladesh, they are slowly becoming accustomed to it. © 2021 by the authors. Licensee SSBFNET, Istanbul, Turkey. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Life Stress Relationship to Adolescents' Bullying Behavior

The current analytical study investigated the relationship between life stress and adolescents' bullying behavior. The study tackled two main themes: life stress and adolescents' bullying behavior. It was applied to a sample of secondary and technical schools students. Results proved statistically significant differences between the mean score of the bullying and nonbullying students on the life Stress Scale and its dimensions, statistically significant differences between the mean score of the bullying students at secondary schools and technical schools on the life Stress Scale and its dimensions and statistically significant differences between the mean score of the bullying and nonbullying students on the Bullying Scale and its dimensions.
Effect of static stretching pre-pliometric exercise on indirect markers of muscle damage

Introduction: Static stretching is commonly used as part of routine exercise preparation, however, its influence on inhibition and/or reduction of muscle damage caused by eccentric exercise is still controversial. Aim: To analyze the effect of the use of a static stretching protocol with duration of 5 min (5 x 60 s) pre-exercise on the response of creatine kinase concentration ([CK]) and delayed onset muscle soreness (DOMS) 24 and 48 hours after plyometric jumping exercise. Methods: This is a counter-balanced quasi-experimental study of repeated measures and the sample consisted of ten healthy volunteers who underwent two experimental sessions: 1) without pre-exercise stretching (control); 2) with static stretching prior to exercise (static stretching). In both sessions the participants underwent a plyometric jumping exercise to induce muscle damage. Prior to the experimental sessions and 24and 48-hours post-exercise the [CK] was measured, as well as DOMS 24and 48-hours post-exercise. Results: There was no significant difference for [CK] and DMIT when compared to the experimental sessions, control and static stretching, (p > 0.05). In addition, both had peak [CK] 24 hours post-exercise, and DMIT was classified as irritant for both sessions. Conclusion: The protocol of static stretching with a duration of five minutes (5 x 60s) prior to the exercise of plyometric jumps did not generate minimization or inhibition of muscle damage associated with the eccentric actions evaluated by [CK] and DMIT.
The Impact of Structure from Motion on Archaeological Fieldwork Practice: Experiences of the Via Consolare Project in Pompeii

The last decade of advances in Image-Based Modeling (IBM) data acquisition based on Structure from Motion (SfM) have made it possible as never before to record excavated archaeological deposits, historical architectural remains, artifacts, and geographical surroundings in the field. Armed only with digital cameras and low-cost or open-source software, researchers can now produce accurate point clouds of millions of points, capturing archaeological information in high-resolution detail. But what changes will IBM really bring to the standards, requirements, and expectations of practical field methodology for projects operating on shoe-string budgets? Since 2010, the Via Consolare Project, a small archaeological research project from a State level University, has employed an entirely open-source and “free for academic use” IBM pipeline to record a variety of archaeological features in Insula VII 6 and the “Villa delle Colonne a mosaico” in Pompeii. Ranging from surviving architecture, to rubble fill layers, to the interiors of inaccessible cisterns and drains, this work has been carried out in preparation for the eventual coordination of these data into a 3D GIS of all recorded stratigraphy. Rarely were sufficient resources available for dedicated equipment or personnel to be devoted to this task. While practical implementation, even in a low-budget excavation environment, has confirmed that this technology can indeed augment archaeological field documentation and provide investigation opportunities that would otherwise be impossible, it failed to replace traditional handdrafted recording techniques and was found to present significant challenges and a number of hidden costs. This emphasizes a need for appropriate and cautious planning in implementation, especially in projects with limited means.
Dietary B vitamins and methionine intakes and risk for colorectal cancer: a case-control study in China.

B vitamins (including folate, vitamin B2, vitamin B6 and vitamin B12) and methionine are essential for methylation reactions, nucleotide synthesis, DNA stability and DNA repair. However, epidemiological evidence among Chinese population is limited. The objective of this study was to evaluate B vitamins and methionine in relation to colorectal cancer risk in a Chinese population. A case-control study was conducted from July 2010 to April 2019. A total of 2502 patients with colorectal cancer were recruited along with 2538 age (5-year interval) and sex matched controls. Dietary data was collected by using a validated food frequency questionnaire. Multivariable logistic regression was used to assess odds ratios (ORs) and 95% confidence interval (CI). The intake of folate, vitamin B2, vitamin B6 and vitamin B12 was inversely associated with colorectal cancer risk. The multivariable ORs for the highest quartile versus the lowest quartile were 0.62 (95%CI 0.51, 0.74; Ptrend < 0.001) for folate, 0.46 (95%CI 0.38, 0.55; Ptrend < 0.001) for vitamin B2, 0.55 (95%CI 0.46, 0.76; Ptrend < 0.001) for vitamin B6 and 0.72 (95%CI 0.60, 0.86; Ptrend < 0.001) for vitamin B12, respectively. No statistically significant association was found between methionine intake and colorectal cancer risk. Stratified analysis by sex showed that the inverse associations between vitamin B12 and methionine intake and colorectal cancer risk were found only among women. This study indicated that higher intake of folate, vitamin B2, vitamin B6 and vitamin B12 was associated with decreased risk of colorectal cancer in Chinese population.
Bioaerosols and atmospheric ice nuclei in a Mediterranean dryland: Community changes related to rainfall

Abstract. Certain biological particles are highly efficient ice nuclei (IN), but the actual contribution of bioparticles to the pool of atmospheric IN and their relation to precipitation are not well characterized. We investigated the composition of bioaerosols, ice nucleation activity, and the effect of rainfall by metagenomic sequencing and freezing experiments of aerosol samples collected during the INUIT 2016 campaign in a rural dryland on the Eastern Mediterranean island Cyprus. Taxonomic analysis showed community changes related to rainfall. For the rain-affected samples, we found higher read proportions of fungi, in particular of Agaricomycetes, which are a class of fungi actively discharging their spores into the atmosphere in response to humidity changes. In contrast, the read proportions of bacteria were reduced, indicating an effective removal of bacteria by precipitation. Freezing experiments showed that the IN population in the investigated samples was influenced by both rainfall and dust events. For example, filtration and heat treatment of the samples collected during and immediately after rainfall yielded enhanced fractions of heat-sensitive IN in the size ranges larger than 5 μm and smaller than 0.1 μm, which were likely of biological origin (entire bioparticles and soluble macromolecular bio-IN). In contrast, samples collected in periods with dust events were dominated by heat-resistant IN active at lower temperatures, most likely mineral dust. The DNA analysis revealed low numbers of reads related to microorganisms that are known to be IN-active. This may reflect unknown sources of atmospheric bio-IN as well as the presence of cell-free IN macromolecules that do not contain DNA, in particular for sizes < 0.1 μm. The observed effects of rainfall on the composition of atmospheric bioaerosols and IN may influence the hydrological cycle (bioprecipitation cycle) as well as the health effects of air particulate matter (pathogens, allergens).
Psychiatric Co-Morbidities in Children with Autistic Spectrum Disorder

Background: Autistic Spectrum Disorder (ASD) is considered a neurodevelopmental disorder, characterized by causing marked decrease in social interaction and communication, conversation skills. The aim of this work was to explore the psychiatric co-morbidities among children with ASD. Methods: This cross-sectional, descriptive study was carried out 55 children less than 18 years old fulfilled criteria for ASD. All patients were subjected to: Psychiatric interviewing and Psychometric tests that included Stanford-Binet test 5th edition, Arabic version of Kiddie Schedule for Affective Disorders and Schizophrenia “K-SADS, Arabic version of Childhood Autism Rating Scale (CARS), Arabic version of Conner’s Scale for ADHD and Arabic version of Screen for Child Anxiety Related Disorders (SCARED) (Child and parent versions). Results: The majority of the studied ASD children were males younger than 13 years old, from rural areas, with mild and moderate intellectual disability, and with severe ASD symptoms. There is statistically significant difference between severity of ASD in studied children measured by CARS, and number of co-morbidities. The most prevalent psychiatric co-morbidities among studied ASD children were anxiety disorders (41.82%), followed by ADHD (36.36%). There is statistically significant difference between severe form of ASD and psychiatric co-morbidities regarding ADHD, Tic disorder, ODD and elimination disorder, While Social anxiety and GAD were more common among children with milder forms. Among the studied children, the specific phobias, ODD and elimination disorders, were more in younger age groups. While social anxiety and psychotic disorders occurred more frequently with older age groups. GAD, somatization and depression were more frequent with females, while ADHD occurred more with males. Conclusion: Presence of comorbid disorders among children with ASD is the rule rather than exception. Male children had more combined subtype and more severe form of the disorder. The most common comorbid psychiatric disorders with ASD are anxiety disorders and ADHD. The early identification and treatment of ASD and comorbid conditions may reduce the likelihood of impairment and persistence into adulthood.
Rollercoaster: An Efficient Group-Multicast Scheme for Mix Networks

Mix network designs such as Loopix provide strong metadata anonymity guarantees that are crucial across many applications. However, because they limit the rate at which messages can be sent by each user, they incur high delays when sending many messages to multiple recipients – for instance, in decentralised collaborative apps. In this paper we present an efﬁcient multicast scheme named Rollercoaster that reduces the time for delivering a message to all members of a group of size m from O ( m ) to O ( log m ) . Rollercoaster can be deployed without modiﬁca-tions to the underlying mix network, allowing it to beneﬁt from the anonymity set provided by existing users. We further develop an extension that achieves the same asymptotic guarantees in the presence of unreliable group members. While the scheme is applicable to many mix network designs, we evaluate it for the Loopix network, which is the most advanced and practical design to date. For this evaluation we developed a network simulator that allows fast, reproducible, and inspectable runs while eliminating external inﬂuences.
FACTORS AFFECTING ABORTION AND STILLBIRTH AND THEIR EFFECTS ON THE SUBSEQUENT REPRODUCTIVE PERFORMANCE OF COWS UNDER EGYPTIAN CONDITIONS

Abortion and stillbirth are serious problems in cattle breeding, from both economic and animal management standpoints. This study aimed to determine the factors that affect the occurrence of abortion and stillbirth as well as to investigate their effects on the subsequent reproductive performances under Egyptian conditions. The total number of records used in this study was 2098 records. The results showed that the overall incidence of abortion and stillbirth were 3.77 and 5.05%, respectively. Logistical regression analysis revealed that the season and cow parity were the important risk factor for the occurrence of abortion. While cow breed, the season, and cow parity were the important risk factor for the occurrence of stillbirth. The odds ratio showed that the likelihood of occurrence of abortion in cows during the summer was significantly increased (P=0.024) compared to the spring. Also, cows with a parity of 3 or higher were significantly related (P=0.011) to the occurrence of abortion compared to the cows with first parity. In addition, the odds ratio showed that the likelihood of incidence of stillbirth in Friesian cows was increased (P=0.001) by 2.89 times compared to crossbred cows. The summer season recorded the highest incidence of stillbirth compared to the other seasons. The cows parity was significantly (P<0.05) associated with the incidence of stillbirth, cows had 1 st parity was higher than that of 3 rd or higher parities. Cows had significantly longer days (P<0.05) to the first service, days open and calving interval (83.9, 138.9, and 432.7 days, respectively) after abortions and (126.5, 182.9, and 478.0 days, respectively) after stillbirths, compared with those that had normal calving (75.1, 109.4, and 403.2 days, respectively).
Caracterização de areia descartada de fundição como agregado para pavimentação

Recebido: 3 de dezembro de 2019 Aceito para publicação: 28 de fevereiro de 2020 Publicado: 30 de abril de 2021 Editor de área: Francisco Thiago Aragão ABSTRACT Waste Foundry Sands (WFS) are by-products of the steel industry due to the foundry process. The residual material can be used in civil construc on as an aggregate because of its mineral origin. This paper aimed to characterize the WFS obtained at two sources, using laboratory tests that are regularly required in highway engineering specifica ons. The laboratory program showed that the tests results sa sfy the main specifica ons in Brazil. Laboratory tests results also show that WFS has characteris cs that are similar to the manufactured sand that is usually used in asphalt pavement construc on. It is concluded that the WFS could be used in asphalt pavement projects, as a subgrade reinforcement, sub-base or base layer and in asphalt wearing courses.