bluuebunny/crossref_metadata_2025 huggingface dataset:
Consumer’s Motivation to Purchase Frozen Food in Kathmandu
Authors: Dabadi Sunita
Published: March 2021

The purpose of the current study is to identify the motivating factors in purchasing frozen food in Kathmandu. Frozen food is considered one of the growing food industry, and bears the ability to sustain itself in today’s market. The research used casual-comparative and descriptive research design with a quantitative and qualitative approach to get an in-depth understanding of the subject matter. The convenience sampling technique was to collect the data where 156 samples were collected using a survey questionnaire from the consumer who bought frozen food from the department store in the Balaju area of Kathmandu. Along with this in-depth interview was taken with the store representative to find out the highly preferable frozen food. A test of ANOVA was run to understand the relationship between demographic variables and motivation factors and purchase intention. The correlation coefficient was used to test the relationship between dependent and independent variables. Research findings reveal that there is no significant relationship between age, gender, and employment status on motivation factor and purchase intention, however, the finding revealed that there is a significant relationship between education and purchase intention. Similarly, the research uncovered that the consumer’s motivation in regards to purchasing frozen food is highly dependent on intrinsic factors (taste, ingredients, nutritional value, value for money), and extrinsic factors (brand, advertisement, convenience, education). Along with this study also revealed on a household, the most purchase frozen food product is frozen MO: MO and on industrial related with the restaurant and hotels, the most purchased frozen food product is the frozen green peas, French fries, and sweet corn.
Adsorptive removal of Pb(II) ions from aqueous solution by activated carbon prepared from cabbage waste
Authors: Paneru Keshav Raj , Jha Binay Kumar
Published: March 2021

The present study deals with the adsorption of Pb(II) from an aqueous solution on activated carbon obtained from cabbage waste. Such activated carbon was prepared by pyrolysis of cabbage waste powder at 700 °C for 1 hour in three different atmospheres, namely open air (CWAC-O), nitrogen (CWAC-N) and nitrogen with steam (CWWAC-NW). The specific surface areas of thus obtained three types of activated carbons were determined by methylene blue adsorption method and found for CWAC-O, CWAC-N and CWAC-NW as 59, 169 and 310 m2/g, respectively. Due to the highest specific surface area of CWAC-NW, the adsorption of Pb(II) experiments was performed onto CWAC-NW only. The influence of various parameters like pH, adsorbent dose, contact time and different initial concentrations of metal ion on adsorption of Pb(II) were studied. The equilibrium data for adsorption was analyzed by using Langmuir and Freundlich isotherm models. The Langmuir adsorption isotherm model was found the best fit for the experimental data. The maximum adsorption capacity was 54.945 mg/g. Kinetics results were described by a pseudo second order model with the rate constant value 0.055 g/(mg∙min). The main mechanism of the adsorption process was physicochemical adsorption and was not solely intraparticle diffusion.
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.
Diversity of pollinators in marigold (Tagetes erecta L.) in a core area of Kathmandu Valley, Nepal
Authors: Gurung Sandhya , Koju Neel Kamal , Koju Narayan Prasad
Published: March 2021

Insect pollinators provide crucial ecosystem services in the urban environment but are under threat and lack comprehensive study and Pollinators’ interaction to change urban land use. Marigold is an important nectar provider for many insects, plays a major role in ecosystem services, and holds a strong cultural and economic value. Therefore, it is important to learn the diversity of insect pollinators in marigolds in an urban environment and assess the impact of urbanization on pollinators. This study aimed to study pollinator diversity, visit frequency, and shift-wise distribution in the core urban area of Kathmandu valley. A total of 21 species of pollinators were recorded from fourteen families and four orders: Hymenoptera, Diptera, Lepidoptera and Coleoptera. Lepidoptera accounted for the highest diversity index of 1.87 followed by Diptera. Furthermore, the study recorded the highest species diversity and abundance during the daytime compared to the morning and the evening hour. The highest diversity of Diptera and Lepidoptera suggests that the urban area is a suitable foraging area whereas, the absence of wild bees further suggests the urbanization as a threat to the wild bee population and demand urgent policy or action for the conservation of pollinators for the conservation of biodiversity and growth in agricultural production.
Pengendalian Kualitas Produk Tekstil Menggunakan Metoda DMAIC
Authors: Lestari Feby Ayu , Purwatmini Nining
Published: March 2021

Penelitian ini bertujuan mengamati efektivitas penerapan metode DMAIC (Define, Measure, Analyze, Improve dan Control) sebagai model pengendalian kualitas pada bisnis distribusi tekstil. DMAIC merupakan bagian dari pengendalian kualitas menggunakan six-sigma. Pada umumnya DMAIC digunakan oleh para produsen barang untuk mengendalikan kualitas. Kualitas merupakan elemen penting, baik bagi produk maupun bagi proses. Penetapan standar kualitas disesuaikan dengan keinginan konsumen. Oleh sebab itu, dibutuhkan pengendalian terhadap kualitas yang dilakukan oleh perusahaan. Tujuan dari pengendalian kualitas barang jadi adalah untuk memastikan kualitas yang akan dirancang dan digunakan oleh perusahaan selaras dengan keinginan konsumen. Penelitian dilakukan di PT Distribusi Tekstil menggunakan teknik analisis data secara deskriptif kuantitatif, berdasarkan hasil observasi dan wawancara. Metode yang digunakan dalam penelitian pengendalian kualitas adalah metode DMAIC dengan alat kendali berupa seven tools pada total quality control, namun tidak semua alat kendali (tools) dari seven tools pada total quality control digunakan dalam metoda DMAIC. Alat kendali yang digunakan hanya brainstorming, SIPOC (supply, input) diagram, check sheet, serta Pareto diagram. Alat-alat digunakan oleh PT Distribusi Tekstil sebagai alat-alat yang digunakan oleh tim QC (Quality Control) PT Distribusi Tekstil dalam menginterpretasikan data QC pada suatu periode tertentu.
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.
Minorities into Migrants: Making and Un-Making Central and Eastern Europe’s Ethnic German Diasporas
Authors: Ohliger Rainer , Münz Rainer
Published: March 2021

Modern German history was shaped by a number of peculiarities and unique developments. One such peculiarity was the continuous flux of territorial as well as ethno-political borders and the strong politicization of policies towards internal and external ethnic minorities. The divergence between state(s) and ethnic nation provided for constant conflicts that were at the basis of changing borders and shifting identities. Not least of all, it created a German diaspora, in particular in Central and Eastern Europe. A crucial event in this process was the establishment of the first German nation-state in 1871. After its establishment, a considerable number of ethnic Germans continued to live outside the state’s borders, most of them in the Austro-Hungarian Empire and in czarist Russia. Territorial and border changes in the aftermath of two world wars intensified (but paradoxically also alleviated) tensions between state, ethnic nation, and their divergence. Contested belonging opened the field for diaspora politics and homeland migration. Namely, the 1919 peace treaties of Versailles, Saint-Germain, and Trianon, which formally ended World War I and reshaped European political geography, left large numbers of the German-speaking population living outside the borders of Germany and Austria. The establishment of new borders led to the creation of new ethnic German minorities in Poland, Czechoslovakia, Yugoslavia, Romania, France, and Italy.
Alevism Online: Re-Imagining a Community in Virtual Space
Authors: Sökefeld Martin
Published: March 2021

Just like physical space, cyberspace, the cultural and social space evolving on the basis of computer-mediated communication, has differentiated into a number of different landscapes (Kollock and Smith, “Communities in Cyberspace”), such as electronic bulletin boards, discussion lists, chat rooms, and homepages, each offering its respective resources, lines of communication, and ecological niches to a rapidly increasing number of users or “cyber-citizens.” Within these landscapes, social and cultural aggregates are developing, connecting people and creating cultural meaning systems almost independent of the constraints of real time and space. By now, a vast literature discussing these issues exists.
Composing Lusophonia: Multiculturalism and National Identity in Lisbon’s 1998 Musical Scene
Authors: Sieber R. Timothy
Published: March 2021

Following Portugal’s post-1974 transition to democracy and entry into the European Union in 1986, state reformulations of national identity increasingly stressed Portugal’s expertise in multicultural, especially international, affairs. By the 1990s, almost all discourses of national culture, history, and identity asserted Portuguese people’s historic facility in promoting dialogue and communication among the world’s cultures and nations and emphasized a history of mediation and brokerage, cross-cultural exchange and fusion, hybrid forms, and multiculturalism. Political and cultural leaders pointed to the existence of a wider lusophone or Portuguesespeaking world, stretching across Europe, South America, Africa, and Asia, as concrete evidence of past and continuing Portuguese global leadership in this domain.
Mobile Motherhood: Armenian Women’s Labor Migration in the Post-Soviet Period
Authors: Ishkanian Armine
Published: March 2021

With the lifting of the Iron Curtain, the citizens of the former Soviet Union had to imagine and construct new lives for themselves; unlike before, these lives could be imagined and lived practically anywhere in the world. While conducting research in Armenia, I learned about men and women who had taken jobs in toy factories in Portugal, canneries in Spain, and factories in Germany. Many people I met in Armenia talked about how they, too, would emigrate to these places to live and work if they could. In this article, I examine the causes of the post-Soviet temporary labor migration of Armenian women to the United States and the experiences and the discourses of self-representation by post-Soviet Armenian transnational migrants whom I studied in Los Angeles area (including Orange County) and in the San Francisco Bay Area. The migrants are physically and culturally living in and between two locations: Armenia and the United States. Their experiences in one location shape and influence their experiences, perceptions, behaviors, and thinking in the second location. Their transnational existence is such that even though they live and work in the United States, they think and feel as if they were still in Armenia; most importantly for the purposes of this article, Armenia remains the center of their moral universe.
Theorizing Africa in Black Diaspora Studies: Caryl Phillips’ Crossing the River
Authors: Goyal Yogita
Published: March 2021

Theorists in cultural studies routinely invoke diaspora as a syncretized configuration of cultural identity: shifting, flexible, and invariably anti-essentialist. This notion pointedly revises an earlier definition of diaspora structured by a teleology of origin, scattering, and return. While these older conceptions of diaspora posited an organic link to Africa, and imagined both symbolic and actual returns to the homeland, the new one focuses on displacement itself, maintaining that the lack of mooring in national or racial certitudes generates anti-essentialist identities. Theorists of diaspora contend that nationalist discourses (such as négritude and Afrocentrism) failed to combat racist binaries of good and evil, black and white—they merely inverted the categories. By placing great value on hybridity, these thinkers often claim that their work transcends such binaries.1 In “Cruciality and the Frog’s Perspective,” for instance, Paul Gilroy argues that the “essentially symbolic” value of the term diaspora lies in its emphasis on “the fact that there can be no pure, uncontaminated or essential blackness anchored in an unsullied originary moment” (309). At the heart of the Black Atlantic, Gilroy argues in a more recent work, is the “desire to transcend both the structures of the nation state and constraints of ethnicity and national particularity” (Black Atlantic19) in favor of a “more difficult option: the theorization of creolisation, métissage, mestizaje, and hybridity” (2). Gilroy’s definition of the Black Atlantic is thus closely linked to the influential concept of hybridity, as both connote an anti-essentialist, split, or agonistic subjectivity. In his view, hybridity enables cultures to avoid replicating the binary categories of the past and to develop new models of cultural exchange by resisting the notion of pure, homogeneous cultures.
Transnationalism and Its Discontents during the 1948 Arab—Israeli War
Authors: Mandel Maud
Published: March 2021

In recent years, scholars have become increasingly interested in the concept of “transnationalism.” Thanks to the progressive globalization of political and economic structures and communication networks, previous constraints on the extent to which individuals can participate in more than one society have diminished. Such shifts have had a profound impact on how scholars have conceptualized minority identities. Thus, while those who worked on immigrant communities once focused primarily on “distinctions between the here and the there, the center and the periphery, black and white…. such analyses are being supplemented by a whole set of new, unbounded concepts … [including] multiplicity, border crossing, disjunction and ethnoscapes, cultural hybridization, porousness, webs, and transnational communities” (Goldin 2).
Where Do We Go from Here? Marxism, Modernity, and Postcolonial Studies
Authors: Dirlik Arif
Published: March 2021

I have chosen as my subtitle the title of the volume that I review and reflect upon in what follows; hereafter, I will refer to it as MMP. My title is a question that comes from the concluding lines of the introduction to the volume by one of its editors, Crystal Bartolovich. I do not intend to take up the discussion where she leaves off, but it seems an appropriate point of departure for further reflection. Perhaps wisely, neither the editors nor the other contributors to the volume make a serious effort to provide an answer to the question. Bartolovich follows up the question with a description of the volume that is worth quoting at some length, as it successfully captures the sense of the book and equally successfully dodges the question she raises:
Электронные тесты по общей геологии. Минералы и горные породы: учебное пособие, [электронное издание сетевого распространения] / А.И. Гущин, А.М. Фетисова, Н.И. Косевич; под ред. Н.В. Короновского. – М.: «КДУ», «Добросвет», 2021. – 47 с.
Authors: Александр Иванович Гущин , Анна Михайловна Фетисова , Наталья Игоревна Косевич
Published: March 2021

Электронное пособие содержит тесты по минералам и горным породам.
Маршруты Крымской учебной практики по Общей геологии: учебное пособие, [электронное издание сетевого распространения] / Под общей редакцией Р.В. Веселовского, М.А. Романовской, Н.И. Косевич и А.И. Гущина. – М.: «КДУ», «Добросвет», 2021. – 215 с. –
Authors: Г.В. Брянцева , Р.В. Веселовский , А.И. Гущин , Н.В. Короновский , Н.И. Косевич , И.В. Латышева , М.С. Мышенкова , В.М. Назарова , М.Ю. Промыслова , М.А. Романовская , А.Н. Стафеев , Т.В. Суханова , Н.С. Фролова
Published: March 2021

Пособие представляет собой путеводитель по избранным маршрутам Крымской учебной практики по Общей геологии, которую проходят студенты 1 курса геологического факультета МГУ имени М.В. Ломоносова. Пособие адресовано, в первую очередь, преподавателям геологических специальностей, которые проводят геологические практики на Крымском полуострове, а может быть интересно тем, кто интересуется геологией Крыма.
Lexical Elaboration and Typographical Enhancement: Their Discrete and Combined Impact on Incidental Vocabulary Learning
Authors: SOHBATİ Amir Hossein , BOROUMAND Mohsen , KHAKZAD ESFAHLAN Farzaneh
Published: March 2021

The present study examined two input modification techniques, namely lexical elaboration (LE) and typographical enhancement (TE), and the combination of these two (LE & TE) to seek the difference among them as far as incidental vocabulary learning through reading is concerned. Ninety six Iranian EFL students whose reading proficiency was at intermediate level were divided into four groups and respectively read texts which were (a) lexically elaborated, (b) typographically enhanced, (c) both lexically elaborated and typographically enhanced, or (d) unmodified baseline. Right after reading, their incidental vocabulary learning was assessed by means of a modified version of Paribakht and Wesche’s (1997) Vocabulary Knowledge Scale (VKS). Results of the ANOVA demonstrated a significant difference among the four groups. In order to pinpoint where the differences exactly lay, a multiple comparison was done through the application of post-hoc Scheffe Test. The results suggested that students performed significantly different and better on a text that had undergone both modification techniques (i.e. double-treatment). However, lexical elaboration alone did not have a statistically significant effect on incidental vocabulary learning through reading. More interestingly, there was no significant difference between the double-treatment and typographical enhancement groups although their mean scores were highly gapped.
A Specific Implementation of Reflective Journals in Self-Regulating Academic Presentation Skills
Authors: BALBAY Seher
Published: March 2021

Reflection journal writing is recognized as an effective learning activity in facilitating learners’ self-regulative skills and abilities and their academic performance in the literature. It is evident that self-regulation is of vital importance in learning. Hence, this study aims to investigate self-reflective journal writing on university students’ self-regulation strategies in a scope of academic presentation and speaking course. An exploratory mixed-method research design was adopted. The participants were selected with convenience sampling method and included 94 undergraduate students studying at a prominent English-medium instruction public university. The data was collected through an online questionnaire, and students’ reflections on the ‘Reflection Journal’ task, which aimed to develop their awareness of the strategies that work for their own learning. Students were assigned to videotape their two main presentations during a required language course, and to keep a journal to reflect on certain points predetermined by the course instructor. The study aims to both investigate the perceptions of students about self-regulated learning in presenting, and the effectiveness of the journal task in promoting their learning. The findings indicated that the majority of students benefited from the task which helped them to reflect on their own micro-level presentation skills. This study concluded that reflective journal keeping could facilitate students’ self-regulation and learning performance when developing academic presentation skills.
Shared Pathogenesis in Depression and Cancer Depicting the Anti-cancer Properties of Anti-depressants
Authors: Faye Abhijeet
Published: March 2021

Pathogenesis of depression is similar to that of cancer in many aspects. Important mechanisms include effects on hypothalamo-pituitary-adrenal axis (HPA axis), functions of prostaglandins, inflammatory markers and cellular immunity. Anti-depressants must have the actions through above mentioned mechanisms when used to treat depression. Literature has mentioned the effects of various anti-depressant agents in reversing or modifying the pathogenic changes that occur in cancer too. It’s worth exploring the anti-cancer properties of anti-depressants and utilize those for the treatment of cancer whenever used for treating associated depression or other psychiatric conditions. Long term studies are needed to prove this less researched aspect of antidepressants.
Association between Preoperative Leukocytosis and Pathological Features of Colorectal Cancers
Authors: Hajebi Reza , Ahmadi Amoli Hadi , Zabihi Mahmoudabadi Hossein , Rahimpour Ehsan , Najjari Khosro , Nazar Elham
Published: March 2021

Background: Using hematologic profiles including leukocyte count have been considered as prognostic factor for some cancers. We have been assessed the predictive value of leukocytosis before surgery in colorectal cancers.Methods: This cross-sectional study has been conducted on patients with colorectal cancer who underwent surgery from 2017 to 2019 in Sina hospital, Tehran. The patients were divided in two groups based on high and low leukocyte count before surgery. Results: A total of 84 patients were studied with colorectal cancers including 46 males (55.4%) and 37 females (44.6%) with the average age of 55.2 (± 13.63) years. 36.1% of patients had leukocytosis in laboratory data before surgery. There was a significant association between tumor’s grade and the incidence of leukocytosis before surgery (P <0.001). The existence of leukocytosis is highly associated with poorly differentiated tumor. Also, the relationship between the location of the tumor and leukocytosis was seen which the location was distal, the possibility of leukocytosis decreased significantly (P <0.005). Conclusion: Our findings suggest that the location of the tumor and its degree of tumor differentiation are related with leukocytosis. This current study by considering leukocytosis before surgery aimed to use this variable as a prognostic factor in patients with colorectal cancer alongside with other variables.
Impact of Covid-19 Pandemic on the Treatment of Cancer Patients Registered at a Tertiary Care Centre in Eastern India
Authors: Ghosh Arnab Kumar , Chhatui Bappaditya , Swetha Bhukya , Bandyopadhyay Anis , Roy Niladri , Basu Abhishek , Choudhury Alakananda , Mondal Janmenjoy
Published: March 2021

Background: Cancer care has suffered during the covid-19 pandemic due to diversion of manpower to treat covid patients and introduction of lockdown measures. Delay in treatment is detrimental to cancer patients. During the national lockdown, many patients were not able to visit our treatment facility. We conducted this study to evaluate the detriment caused by the pandemic on cancer care in terms of disease progression and the socio economic factors associated with delay in presentation.Materials and Methods: Patients visiting our OPD who were being treated at our department and could not visit the facility during the lockdown were selected. Present status of the disease was assessed using clinical examination and radiological tests. Psycho social distress was assessed using PO BADO SF questionnaire. Disease progression, cause of delay was assessed against various factors like per capita family income, cost of transportation etc. Appropriate statistics was used to analyse and represent the data. Results: 50% patients had disease progression. “High cost of transportation” was the most common response given by patients for not visiting the treatment facility during the lockdown. Most patients being treated with radiotherapy (69%) had responded either “high cost of transportation” or “lack of proper accommodation” as cause of delay (p 0.065). Patients with treatment gap of 80 days or more had higher per capita family income, higher cost of transportation during the lockdown and larger distance between residence and treatment facility. 77.5% patients had psycho social distress according to assessment by PO BADO SF questionnaire.Conclusion: COVID 19 pandemic control measures have impacted cancer care in resulting in disease progression, treatment delays and psycho-social distress. A number of factors may have contributed to the treatment delays like high cost of transportation during the lockdown, longer distance between residence and hospital.
Ore treatment hydrogen peroxide during heap leaching of gold
Authors:   The Branch of the RSE «NC CPMS RK» State Scientific-Industrial Association of Industrial Ecology «Kazmekhanobr», Almaty, Kazakhstan, Yessengarayev Ye.K. , Surimbayev B.N. ,   Al-Farabi Kazakh National University, Almaty, KZ, Baimbetov B.S. ,   Satbayev University, Almaty, Kazakhstan, Mamyachenkov S.V. ,   Head of Chair, Department of Non-Ferrous Metallurgy, Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russia, Kanaly T.S. ,   Laboratory of physical and analytical methods, Almaty, Kazakhstan
Published: March 2021

Over the past century, many problems have been focused on the problems of low leaching rate of gold and methods have been developed to intensify the leaching of gold. Among these methods, the use of hydrogen peroxide to accelerate the leaching of gold is known. In order to intensify the leaching process, the indicators of cyanide leaching of gold from ore using hydrogen peroxide were studied. This article presents the results of assay-gravimetric, chemical, and mineralogical analyses of gold-bearing ore from the Sari Gunay Deposit (Iran). The content of sulfide sulfur ore belongs to the category of low-sulphide, by oxidation of sulphur (50.70%) to the category of oxidized ores. Thermodynamic analysis of possible reactions of ore components with hydrogen peroxide is carried out. Laboratory studies on cyanide leaching of gold have shown that the maximum recovery of gold is 52.92% at a concentration of hydrogen peroxide of 0.5%, the recovery of gold without ore treatment is 52.03%. The results of laboratory and column tests with and without treatment with hydrogen peroxide (H2O2–0.5%) were compared. Treatment of gold-bearing ore with hydrogen peroxide during heap leaching of gold increases gold recovery by 1.2% and amounts to 55.89%, without treatment - 54.69%. This increases the consumption of sodium cyanide by 0.04 kg/t.
Study of biohydrometallurgical technology used to recover gold from ore at a gold-recovery plant
Authors:   Satbayev University, Institute of Metallurgy and Beneficiation, Koizhanova A.K. , Sedelnikova G.V. ,   JSC Rosgeologia, Erdenova M.B. ,   Satbayev University, Institute of Metallurgy and Beneficiation, Berkinbaeva A.N. ,   Satbayev University, Institute of Metallurgy and Beneficiation E.M. Kamalov, Kamalov E.M. ,   Satbayev University, Institute of Metallurgy and Beneficiation
Published: March 2021

The article contains the results of the studies performed for the biochemical eхtraction modes for mineral raw materials using thionic bacteria Acidithiobacillusferrooxidans of a certain strain capable to oxidize sulfide minerals. A representative sample of mineral raw materials was taken, and its physical and chemical studies were performed. The optimal conditions to leach mineral raw materials with biochemical solvents based on various factors (temperature, S:W) were established. Modern physical and chemical methods of analysis were used during the study: X-ray fluorescence, X-ray phase, mineralogical, electron probe, chemical analyzes, IR methods to study the phase composition of ores and changes in the structure of minerals. The chemical composition of the ore sample quartered and crushed up to a size of -0.074 mm is as follows, wt. %: SiO2 - 60.11; Al2O3 6.2; Zn 0.016; Cu 0.10; Fe - 2.5; S 0.50; Au - 3.67 g/t and Ag - 3.2 g/t. This paper discusses various options for agitational leaching with acid pre-wash, bacterial dissection and oxidative decomposition of minerals using sodium hypochlorite. The results obtained showed that the most effective method to increase the gold recovery is to perform bacterial oxidation of ore using acidophilic bacteria At. Ferrooxidans preliminarily adapted to the material composition of the test sample, followed by treatment with sodium hypochlorite solution and cyanidation. Biohydrometallurgical ore processing provides high gold recovery (78.1%).
Granular magnesia compositions
Authors:   Rudny Industrial Institute, Miryuk О.А.
Published: March 2021

The results of studies of granular materials from magnesia compositions are presented. To obtain the compositions, fillers of various origins were used: sawdust, wheat husk, rubber and cork crumbs, ash microsphere. The formulations of molding mixtures that ensure the production of granules by the method of pelletizing are determined. The factors of influence on the strength of granules at various stages of the technological process are revealed. Methods for reducing the density of magnesia granular materials by combining various types of fillers and introducing a gas-forming agent are proposed. The use of caustic magnesite ensures reliable bonding of the filler particles in the granules. Features of hydrate formation of magnesia binders allows the use of low-temperature processing of raw granules. The expediency of increasing the temperature of the salt recluse to accelerate the hardening of the porous granules is shown. Magnesia granules with a bulk density of 400 – 500 kg/m3 were obtained. The work is aimed at creating a resource-saving technology of non-annealed granular aggregates for light concrete
Radial-shear rolling as a new technological solution for recycling bar scrap of ferrous metals
Authors:   NJSC ", Lezhnev S.N. ,   Rudny Industrial Institute", Naizabekov A.B. ,   NJSC "Rudny Industrial Institute", Volokitina I.E. ,   NJSC "Rudny Industrial Institute", Panin E.A . , Kuldeyev E.I. ,   Satbayev University, “Institute of Metallurgy and Ore Benefication” JSC
Published: March 2021

Waste recycling of both ferrous and non-ferrous metals is a useful process for the economy of any country. This paper proposes a new technology for recycling bar scrap of ferrous metals by rolling it in radial-shear rolling mills by producing a commercial product in the form of bars with an ultrafine-grained gradient structure. Studies have shown that the deformation of bar scrap in the form of pieces of reinforcement made of steel grade 18G2S in a radial-shear rolling mill makes it possible to significantly disperse its structure by producing a gradient ultrafine-grained structure, and this, in turn, leads to the elevating of the mechanical characteristics of this steel grade. Thus, the tensile limit of the 18G2S grade steel deformed on the radial-shear rolling mill was 620 MPa (at the initial value of 365 MPa).
The effectiveness of the use of physical impact on the reservoir to reduce the viscosity and increase oil recovery
Authors:   Satbayev University, Moldabayeva G.Zh. , Suleimenova R.T. ,   Satbayev University, Agzamov A.Kh. ,   Karshi Engineering and Economic Institute, Abileva S.Zh. ,   Satbayev University, Baluanov B.A. ,   Satbayev University, Karimova A.S. ,   Atyrau University of Oil and Gas named after Safi Utebayev
Published: March 2021

This article provides a technical and economic assessment of the effectiveness of the application of physical impact on a productive formation in one of the fields in Western Kazakhstan. The world experience of using the technology of physical stimulation in the fields shows high technological efficiency. Also, in order to optimize oil production, as a result of physical impact, changes in oil viscosity, an increase in oil production and a decrease in water cut were calculated. All the Cretaceous horizons have good reservoir properties, however, the high viscosity of oil and poor consolidation of the rocks composing the horizons do not allow for the full recovery of the product. Determination of phase permeabilities in the oil-water system was carried out in laboratory conditions with joint stationary filtration. According to the calculations performed in order to optimize oil production, as a result of physical impact, the oil viscosity changed to a value of 430 cP from 700 cP, the value decreased almost 2 times. There is also an increase in oil production and a decrease in water cut.
Explanation of the cluster structures melting mechanism and their influence on the molten state’s physical and chemical nature
Authors:   Karaganda Technical University, Shaikhova G.S.
Published: March 2021

There are results of the melts of semimetals and semiconductors of various structural groups research in the article. On the example of simplified regular Bethe lattice one can model destruction and aggregation of structures in clusters and on it’s basis to substantiate the metal melts properties in the form of nanolayers. The variety of compressibility polytherms forms in electronic melts requires typing, since their analysis makes it possible to explain the mechanism of the aggregation and dissolution processes of extended objects in melts. The article contains formulas that allow explaining the mechanism of the dissolution of cluster structures and their influence on the physicochemical nature of the molten state. There is considered the process of cluster fragmentation. Larger fragments of clusters are formed in the process of crushing, and this fact leads to the compressibility that decreases more rapidly, only after passing through the extremum it begins to increase due to the thermal loosening. The study of the function's compressibility for an extremum in the compressibility's temperature dependence also indicates the changing process of the clusters decomposition mechanisms in melts with an increase in temperature and vice versa to aggregation with a decrease in the melt temperature to the melting temperature.