bluuebunny/crossref_metadata_2025_split huggingface dataset:
Yield maximization of direct sown rice (Oryza sativa l.) under water constraint situation
Authors: Kalyanasundaram D. , Arthi E , Senthil Kumar K. P. , Harini Sri S. , R Augustine. 
Published: March 2021

More efficient water management practices need to be adopted for better sustainable rice production grown under traditional areas due to increased water scarcity. Among the different water management practices, efficient new generation water-saving chemicals and organic products were used to conserve water under field condition. An experiment was conducted to evaluate the yield maximization in direct sown CO51 rice (Oryza sativa L.) under water constraint situation. The main plot treatments comprised of three levels of irrigation viz., Conventional irrigation (M1), Tensiometer based irrigation (M2) and Deficit irrigation (M3), respectively and were tested with four different water conservation practices in sub-plots viz., soil application of water-saving crystals (WSC) @ 5 kg ha-1 (S1), foliar application of drought shield @ 3 litres ha-1 (S2 ), soil application of humic granules @ 2.5 kg ha-1 (S3) and soil application of FYM @ 12.5 t ha-1 (S4). Experimental results indicated that Tensiometer based irrigation with soil application humic granules @ 2.5 kg ha-1 M2S3) recorded higher number of panicles m-2 (411) and number of filled grains panicle-1 (108.16) in direct-sown rice. However, M2S3 recorded significantly maximum grain yield (6352 kg ha-1) and minimum (3940 kg ha-1) in (M3S4) deficit irrigation applied with FYM @12.5 t ha-1 in the year 2018 Sornavari season, respectively. Thus the Tensiometer based irrigation with soil application of humic granules @ 2.5 kg ha-1 can be a feasible approach for increasing grain yield and conserve water in north eastern region of Tamil Nadu, by promoting water use efficiency method in direct rice cultivation areas.
Biodiversity and monthly density fluctuations of water mites in Khankra gad, a spring-fed tributary of river Alaknanda, Pauri Garhwal in Uttarakhand, India
Authors: Negi Shailza , Dobriyal A. K. , Bahuguna Pankaj 
Published: March 2021

Hydrachnidia is an important group of aquatic invertebrates. They play an important role in regulating other invertebrate populations, thus influencing the composition and functionality of river ecosystems. The present study aims to assess the habitat ecology, density and diversity of aquatic mites in the Khankra gad, Rudraprayag district for a period of two year on a monthly basis, from July 2018 to June 2020. The Khankra gad is a perennial spring-fed stream originating from the Bansoun peak in district-Rudraprayag of Garhwal Himalaya (800 m asl). A total of 2537 Hydrachnidia samples were collected, belonging to 6 families viz, Torrenticolidae, Sperchontidae, Feltriidae, Hygrobatidae, Lebertiidae and Aturidae. Sperchontidae, Torrenticolidae and Hygrobatidae were the common families recorded in both spots, whereas Feltriidae was recorded in Spot-1, Lebertiidae and Aturidae were recorded in Spot-2. The highest numbers (1842) of Hydrachnidia were collected from Spot-2. A total of 19 aquatic mite species were recorded in Spot-1 and 25 species in Spot-2 throughout the study period. Aquatic mites showed maximum density (177 units.m-2 in Spot-1 and 274units.m-2 in Spot-2) in December and minimum (11 units.m-2 in Spot-1 and 17 units.m-2 in Spot-2) in July. Various ecological parameters of our study indicated that Khankra gad is a good habitat for aquatic mites.
Biological clock vs Social clock conflict in Adolescents
Authors: Verma Pragya , Yadav Arjita , Rani Sangeeta , Malik Shalie 
Published: March 2021

Alteration of day and night is one of the essential circadian rhythms that build the phenomenon of sleep/wake in humans and other animals. Daily rhythms impact different individuals differently. Light exposure and an individual's circadian response are two aspects that create diversity in phenotype. These diverse phenotypes are called chronotypes. Chronotype varies over the life history stages. Chronotype is seen as morning type in children, evening type in adolescents, and again reverts back to the morning type in adults and old-aged individuals. It is observed that adolescents being evening types have bedtime later in comparison to children and adults. Adolescent physiology/ body clock does not allow them to sleep early and school routine/social clock does not let them sleep till late. Thus, their night phase is shrunk and sleep hours are reduced, which hinders their day-time functioning, including mental tasks such as cognition, learning and memory-based exercises, and physical tasks such as physical presence during field and athletic events. These days sleep debt is a critical health concern in the adolescent population. The current review focuses on the adolescent sleep-needs and various factors affecting their healthy sleep. This also encompasses the understanding of biological clocks, their misalignment, disrupters, causes and impact. The present study would be helpful in finding out the difference between the biological clock and social clock of the adolescent population, elaborates the need for sleep education and suggests a solution to this alarming problem of sleep debt in teens.
The ways of forming the Old Church Slavonic lexical fund
Authors:   Institute of Slavic Studies, Russian Academy of Sciences, Efimova Valeriya S. 
Published: March 2021

In the monograph, the ways of forming the Old Church Slavonic lexical fund are analyzed with the use of new research methods. The author puts forward a hypothesis concerning St. Cyril’s translation strategies in different areas of nomination – derivation, compounding, transfer of the Greek superlatives by Slavonic means, etc. Attention is paid to poorly investigated nominations by substantivized participial forms and multi-word nominations. The new data confirm the considerations expressed earlier by the author of the monograph that there is a fundamental difference between the procedure of compounding and the procedure of formation of single-root derivatives, and that morphemic calquing as a word-formation procedure in the Old Church Slavonic needs special revision.
Factors Influencing Investment Decisions of Nepalese Investors
Authors: Shrestha Purna Man 
Published: March 2021

The study focuses on the factors influencing investment decisions of Nepalese investors in the stock market, with a sample size of 110 respondents of Surkhet Valley. The data are collected using structured questionnaire containing yes/no response questions, multiple choice questions, ranking questions, and Likert scale questions. The survey was conducted in June, 2018. The factors influencing investing decision are grouped into three main variables i. e. company related variable (CRV), risk and return related variable (RRV), and market related variable (MRV). In company related variable factors such as management team, financial performance, size, EPS, DPS are included, in risk return related variable expected return, past return, risk of the company, liquid securities etc. are included, and in market related variable factors such as market information, market price per share, dividend growths etc. are included.
This study concluded that majority of investor prefer to by stock from primary market, investor analyze the company before making investment decision, investor monitor their portfolio occasionally, and most of the investor use own saving for making investment in stock.
Finally, this study concluded that investment decision of Nepalese investor is more influenced by company related variable (CRV) than market related variable (MRV) and risk and return related variable (RRV). Positive and significant coefficient of company related variable (CRV) is observed in all regression models. It can, therefore, be concluded that the Nepalese investor makes investment decision observing the company related variable of Nepalese companies.
Socio-Demographic Factors in Predicting Organizational Commitment of Nepal Telecom Employees
Authors: Jain Bandana Kumari , Lamichhane Krishna Kumar 
Published: March 2021

The study intends to assess the 3-dimensional organizational commitment and its effects on socio-demographic factors such as gender, age, and tenure of Nepal Telecom employees. Random sampling method proportionately to the job position level had been harnessed to collect primary data with survey method and ultimately, 322 samples were gathered. Analysis tools t-test, ANOVA, post hoc analysis harnessed to examine the objectives.
The study results that age and work experience are significantly associated to employees’ normative commitment while higher working years of employees are different from less experiential employees in terms of overall commitment and continuance commitment.
Effects of weather on breeding success of Ashy prinia (Prinia socialis) in Manigram of Tilottama Municipality, Nepal
Authors: Adhikari Shova , Sharma Hari Prasad , Gautam Ramji , Basaula Rajendra 
Published: March 2021

Breeding success of species, including nest construction to chick fledgling, is a major determining factor for the conservation of bird species. Ashy prinia (Prinia socialis), a small-sized, insectivorous bird, which is widely distributed in South East Asia is less explored for its breeding ecology. This study was performed in natural habitats of Tilottama municipality, Nepal, and the data such as nest characteristics, clutch size, activities of parents on nest were collected with regular monitoring of nest from the beginning of its construction to chicks fledgling. Ashy prinia constructed nests on bushes of shrubs and grasses using materials like grass, nylon threads, small twigs, cotton swag and some threads. The clutch size was four; and the average length and breadth of eggs were 1.6 cm and 1.2 cm, respectively. The nest was able to fledge chicks successfully, and their breeding success was 75%, determined by the activities of parents, local weather conditions mainly cloud cover, temperature and wind. In addition, the breeding success of the Ashy prinia might be due to monogamous parental cares in which both parents maintained the microclimatic condition of the nest from incubation period to chick fledgling.
Analysis of Students' Understanding of Mathematical Concepts in Solving Comparative Problems
Authors: Puspithasari Hafifah Debby , Pujiastuti Heni 
Published: March 2021

The purpose of this study is to analyze the students 'concept and students' mistakes while solving the comparison task. This experiment used qualitative descriptive methods. The Subjects of this experiment were the students in Daan Mogot Junior High School grade. Data were collected by observation method. The result shows that the percentage of students' concept understanding while solving the Comparison is 67.18%, the result of object clarification according to another character is 37.69%, giving sample and non-sample is 99.04%, presenting concept by the right form mathematical representation is 90,38%, developing the need-qualification and enough-qualification concept is 14,1%, using the benefit and choosing the certain procedure is 73,46% and applying concept and algorithm to solve the problem is 41.15%. The students' mistakes while solving the Comparison task are: conceptual mistake, calculation mistake, using the wrong logic to conclude, using the wrong theorem, not checking the task. Some indicators such as the students don't understand enough about the abstract question, conceptual proof, how to start the proof, they get difficulties to remember the definition in conceptual proofing and use them to construct the proof, the students are not paying attention while reading the question, and they are having less confidence to answer the questions are the causes of the students' mistake while solving comparison.
Keywords: Conceptual Understanding, students' mistake, Comparison
Implementing Class Wide Peer Tutoring to Enhance Students' Mathematical Reasoning Ability in Understanding Absolute Value Equations and Inequalities
Authors: Gradini Ega , B Firmansyah , Wahyuni Septia , Mailinda Meri 
Published: March 2021

This article aims to determine the effectiveness of Class Wide Peer Tutoring (CWPT) implementation to improve students' mathematical reasoning abilities. This research is experimental research with a mixed-method approach. The research sample was determined through cluster random sampling. Data were collected through mathematical reasoning tests arranged according to indicators of mathematical reasoning ability. Data were analyzed using inferential statistics with the stages of normality, homogeneity, and hypothesis testing. The result shows that the implementation of CWPT enhances students' mathematical reasoning on Equations and Inequalities of an Absolute Value. Mathematical reasoning test results show that the 10th grader score of mathematical reasoning is 76.75 (Good). The indicator of mathematical reasoning that is the most difficult for students to master is "drawing logical conclusions" with the acquisition of a mathematical reasoning score of 35.81 (poor), while the easiest mastered by students is "Presenting mathematical statements or premises in writing, drawings or graphics" with mathematical reasoning score of 80.14 (Very Good). The students' mathematical reasoning ability on the indicator "compiling an analogy or explanation of the problem and its solution" is 74.09 (Good). The mathematical reasoning ability of students on the indicator "mathematical manipulation" is 42.10 (fair).
Keywords: Mathematical Reasoning, Students’ ability, Class Wide Peer Tutoring
The Influence of Contextual Approach on the Mathematical Understanding and Communication Abilities as Seen from Students' Initial Mathematical Abilities
Authors: Sari Siti Maryam , Nindiasari Hepsi , Santosa Cecep Anwar Hadi Firdos 
Published: March 2021

The purpose of this research was to determine the effect of a contextual approach on students' mathematical understanding and communication abilities in terms of their initial mathematical ability (KAM) in the Pythagorean Theorem class VIII material. This research was conducted at MTs Al Ihsan Serang City in the academic year 2019-2020 even semester. Methods The research method used is a quasi-experimental, data collection techniques, namely the ability to test mathematical understanding and communication, hypothesis testing using a two-way manova with a significance level of 5%. Before testing the hypothesis, the analysis prerequisite test was carried out, namely the multivariate normality and homogeneity test, the test results were the data were normally distributed and homogeneous. From the results of the analysis test using MANOVA, it can be concluded that: there are differences in the mathematical understanding and communication abilities of students who get a contextual approach with students who get a scientific approach, there are differences in the mathematical understanding and communication abilities of students who get a contextual approach with students who get a scientific approach between high KAM and low, and there is no interaction between learning approaches and KAM on students' mathematical understanding and communication skills
Keywords: Contextual Approach, understanding, mathematical communication, KAM
Maple 13 Assisted Problem Based Teaching in Vector Calculus Course
Authors: A T. Tutut Widiastuti , Kariadinata Rahayu 
Published: March 2021

The purpose of this study was to obtain learning outcomes by looking at the differences between classes learning of maple 13 application assisted by problem based teaching materials with convensional learning question and answer. The method used in this research is an experimental method with random sampling. The result of thi research are: (a) validation was carried out by competent expert lecturers to assess the feasibility of calculus vector questions to obtain good and very good criteria, so the valid test items were used for research, (b) from the validation results of the test items, 5 questions were used. The research (experiment) of 8 questions was tested, (c) the normality test was carried out on the N-gain and the postest score of class A (experiment), namely the class using Maple 13 application learning assisted by problem-based teaching materials and class B (control class ) by using learning with lectures and questions and answers, obtained a class A posttest score with a sig. 0.03 <0.05 means that class A (experimental) comes from a population that is not normally distributed, then the next test is the average difference test using the Mann Whitney test, (d) the average difference test between class A (experimental), namely the class using learning Maple 13 application assisted with problem-based teaching materials and class B (control class) using learning with lectures and questions and answers obtained from the Mann Whitney test with Asymp. Sig. (2-tailed) = 0.475> 0.05 means that between class A and class B have different averages but have the same level of achievement or there is no difference for the level of achievement of the average increase.
Keywords: The Maple 13 Application Assisted By Problem-Based Teaching Materials, Calculus Vector
The Effect of Learning Styles on Students' Mathematical Communication Ability
Authors: Tahir Tahir 
Published: March 2021

This research is motivated by the low mathematical communication skills of students, where there are many factors that influence this, one of which is the student's learning style. This study aims to determine the effect of learning styles on students' mathematical communication skills. This type of research is ex-post-facto research and was conducted at SMA Negeri 1 Mawasangka using a sample of 52 students. From the results of the analysis carried out, it was found that there was a relationship between student learning styles and students' mathematical communication abilities. This was because rhit > rtab (0.38> 0.27), the relationship formed was a positive one-way relationship because of the positive rhit value. In addition, from the one-way ANOVA, it was found that Fcount> Ftable, it was concluded that there were differences in students' mathematical communication skills when viewed from their learning styles and this difference was significant. So it can be concluded that the learning style has an effect on students' mathematical communication skills, and this influence is a positive influence.
Keywords: learning styles, mathematical communication skills, influence.
Improve Creative Thinking Ability of Vector Material Through Problem Posing Type Pre Solution Posing at SMAN 3 Semarang
Authors: Nuhariyani Tri Martini 
Published: March 2021

In learning process, students often appear reluctant to read mathematics books. So that the students do not understand the meaning and concept of the material they have heard and recorded. This research offers a pre-solution posing type of problem posing model. Students make questions according to the situation given by the teacher and then it solve by themselves or finish them as discussion materials. The research objective is to examine, to describe the increase in creative thinking skills which have the effect of increasing learning achievement through the pre-solution posing type of problem posing model. The research was conducted at X-MIPA 2 SMAN 3 Semarang on vector material. Research variables are creative thinking skills and learning achievement. Data on creative thinking abilities were taken using observation sheets, data on learning achievement were taken by tests. The obtained data were scored, processed and presented descriptively. The results showed, the number of students completed, respectively, on the creative thinking variable was 57% and 86%, while the learning achievement was 60% and 91%. The increase that occurs shows the application of improved learning actions on vector material with the pre-solution posing type of problem posing learning model.
Keywords: Creative Thinking, Pre Solution Posing, Learning Achievement, Problem Posing
Use of Microsoft Teams and Youtube in the Application of E-Learning to Improve Student Learning Outcomes in Three-Dimensional Material
Authors: Sugiarto Wahyu 
Published: March 2021

The objectives of this study were (1) to increase the motivation to learn the mathematics of students of XII MIPA-2 with three-dimensional material through the application of E-learning using Microsoft Teams and Youtube, (2) to increase the mathematics learning achievement of students of XII MIPA-2 with three-dimensional material through the application of E-learning using Microsoft Teams and YouTube. The method used is classroom action research. Data collection through tests and non-tests. The test technique is to determine learning achievement using the items while the non-test technique is to determine the development of learning motivation using observation sheets. Data analysis used comparative descriptive for learning achievement data and qualitative descriptive for learning motivation data. The results of this classroom action research showed that the students 'motivation to learn mathematics increased from low to high and the average score of students' mathematics learning achievement increased by 20.85% from 65.05 to 78.61 with an increase in completeness level of 57.88%, namely from 52, 78% to 83.33%, so theoretically and empirically through the application of E-learning using the Microsoft Teams and Youtube application it can improve the results of motivation and achievement in learning mathematics in three-dimensional material for students of class XII MIPA-2 SMA Negeri 1 Jepara in the odd semester of 2020 -2021.
Keywords: E-learning, Microsoft Teams, Youtube, three dimensions.
Anticipation of Student Ideas In Designing Sierpinsky Square Batik Using Maple
Authors: Yudianto Erfan 
Published: March 2021

This research is motivated by the importance that students have the ability to anticipate. The anticipation skill is needed by students to complete fractal batik designs (Sierpinsky) by using maple so that the resulting ideas matches the original expected ideas. The purpose of this research is to enable students to use maple to design Sierpinsky square batik. Data in this research were collected by tests, interviews and observations. The results showed that students frequently used analytical and exponential anticipation skills.
Keywords: Analytic Anticipation, Exploratory Anticipation, Sierpinsky, Sierpinsky Batik.
Optimal parameters of blood flow restriction and resistance training on quadriceps strength and cross-sectional area and pain in knee osteoarthritis
Authors: Mahmoud Waleed S. , Osailan Ahmad , Ahmed Ahmed S. , Elnaggar Ragab K. , Radwan Nadia L. 
Published: March 2021

BACKGROUND: Knee osteoarthritis (KOA) is one of the most common chronic diseases impacting millions of elderly people. OBJECTIVES: The study compared the effects of two intensities of partial blood flow restriction (BFR) with low-intensity resistance training on quadriceps strength and cross-sectional area (CSA), and pain in people with knee osteoarthritis (PwKOA). METHODS: Thirty-five PwKOA, aged 50–65, participated. Quadriceps CSA was measured by ultrasonography, quadriceps strength – by isokinetic dynamometry and pain by VAS. These outcome variables were obtained at the beginning of the study and re-evaluated eight weeks after the intervention. RESULTS: An interaction effect was present for quadriceps CSA ([Formula: see text] 0.042) and quadriceps strength ([Formula: see text] 0.006), showing that using 70% of total occlusion pressure with 30% 1RM had a more significant effect. Knee pain improved significantly through the main effect of BFR ([Formula: see text] 0.001), and low-intensity resistance training ([Formula: see text] 0.011). Pain improved more at 70% of total occlusion pressure, with 30% of 1RM (2.5 [Formula: see text] 1.06) than 50% total occlusion pressure with 10% of 1RM (5.77 [Formula: see text] 1.46). CONCLUSION: A combination of 70% of total occlusion pressure with 30% 1RM could be beneficial in PwKOA in improving pain, and increasing the quadriceps strength. The changes in the quadriceps strength could be a predictor for knee pain.