bluuebunny/crossref_metadata_2025 huggingface dataset:
ОЦІНКА СОРТІВ КАРТОПЛІ ЗА СТІЙКІСТЮ ДО ПОСУХИ В УМОВАХ ЦЕНТРАЛЬНОГО ПОЛІССЯ УКРАЇНИ
Authors: ПИСАРЕНКО Н.В. , СИДОРЧУК В.І. , ЗАХАРЧУК Н.А. , ОЛІЙНИК Т.М.
Published: April 2023

Мета досліджень. Оцінити сорти картоплі різних груп стиглості вітчизняної селекції у різних середовищах та виділити генотипи з високою продуктивністю і стійкістю до посухи з подальшим використанням їх в селекційній практиці. Матеріали і методи. Дослідження проведені впродовж 2018–2019 і 2021–2022 рр. в польових умовах селекційної сівозміни лабораторії селекції Поліського дослідного відділенні Інституту картоплярства НААН України. Об’єктом досліджень слугували 26 сортів картоплі різних груп стиглості. Методи досліджень польові, селекційні і математично-статистичні. Результати досліджень. Для диференціації сортів картоплі за реакцією на стійкість до посухи було використані індекс сприйнятливості до посухи, індекс толерантності до посухи, індекс стабільності урожаю, індекс урожайності, індекс толерантності до стресу, індекс посухостійкості, відносний індекс посухи, індекс продуктивності в стресових і сприятливих умовах. За результатами досліджень встановлено, що за період 2018–2019 рр. за комплексом вищого значення показників індексів до середнього групи стиглості проявили сорти: в групі ранніх – Серпанок, Вигода, Бажана, Світана і Радомисль; серед середньоранніх – Партнер, Межирічка 11, Фанатка, Сонцедар і Опілля; поміж середньостиглих – Базалія, Чарунка і Володарка; в середньопізній групі – Червона рута, Олександрит і Роставиця. Досліджено, що в період 2021–2022 рр. найвище значення індексів посухостійкості продемонстрували сорти: серед ранньостиглих – Серпанок, Тирас, Світана, Взірець і Радомисль; в середньоранніх – Партнер, Межирічка 11, Сонцедар і Левада; поміж середньостиглих – Базалія, Чарунка, Явір, Альянс і Іванківська рання; в середньопізніх – Червона рута і Олександрит. Висновки. Використання в селекційній практиці індексного підходу з оцінки посухостійкості значного обсягу генотипів картоплі дозволяє виділити високоврожайний матеріал в умовах стресу і його відсутності. В подальшому виділені стійкі до посухи сорти картоплі можна рекомендувати для вирощування в менш сприятливих ґрунтово-кліматичних зонах України та використання їх в селекційних програмах зі створення стресостійких генотипів.
СОРТИ ФУНДУКУ ЯК ДЖЕРЕЛО ОТРИМАННЯ ЦІННИХ ХАРЧОВИХ ЕЛЕМЕНТІВ В УМОВАХ ПІВНОЧІ СТЕПУ УКРАЇНИ
Authors: СІМЧЕНКО О.О. , НАЗАРЕНКО М.М.
Published: April 2023

У світі продовжується активний дискурс щодо питання забезпечення повноцінним харчуванням людства, перш за все з урахуванням потреб в деяких критично важливих мікроелемента (селен, цинк, кобальт, тощо) та вітамінах. Традиційні, широко розповсюджені сільськогосподарські культури не забезпечують надходження їх в необхідній кількості. Мета. Метою досліджень було показати цінність за окремими необхідними в харчуваннями корисними речовинами горіхів фундуку сортів, на основі котрих можливе створення промислових насаджень цієї культури (з метою інтродукції в зону нестійкого зволоження) для вирішення проблеми повноцінного харчування. Методи. Досліджували чотири сорти фундуку Барселонський, Каталонський, Косфорд, Галле на придатність до впровадження в промислові насадження на Півночі України. Визначення вмісту мінеральних речовин проводилося з використанням атомно-емісійного спектрометра з індуктивно-зв’язаною плазмою Agilent 5110 за інтенсивністю емісії світла з характерними довжинами хвиль. Результати. Таким чином за вмістом цінних органогенних елементів та мікроелементів відзначився сорт Косфорд (вміст кальцію, сірки, магнію, калію, молібдену, кобальту, марганцю, насичені жирних кислот та вітаміну Е, але з достовірно нижчим вмістом міді за всі інші сорти), другим є сорт Галле (вміст сірки, цинку, насичених жирних кислот, харчових волокон, вітамінів А та С), потім сорт Каталонський (вміст фосфору, цинку, марганцю, вітаміну С) і найгіршим комплексно сорт Барселонський (високий вміст міді та вітаміну С). Не знайдено суттєвої варіативності за вмістом вітаміну РР. Фактор генотипа був значущим в більшості випадків, тобто вміст усіх елементів крім вітаміну РР, котрий не варіював в залежності від сорту. Кліматичні умови значимо не вплинули, за виключенням вмісту калію. Посадки сорту Косфорд з компенсацією за рахунок додаткових посадок сорту Галле слід визначити більш перспективним поєднанням. Жоден сорт не забезпечую харчової повноцінності в комплексі. Висновки. За підсумком можна відзначити найбільш вдалим за комплексним вмістом речовин, цінних для харчового раціону людини сорт Косфорд, органічно доповнює йото сорт Галле. Вирощування сорту Каталонський з огляді на формування високого рівня харчової цінності фундуку під питанням, вирощування сорту Барселонський недоцільне.
МАТЕМАТИКО-СТАТИСТИЧНИЙ АНАЛІЗ СВІТОВОЇ ПРАКТИКИ ЗАСТОСУВАННЯ МІНЕРАЛЬНИХ ДОБРИВ НА ПОСІВАХ М’ЯТИ ПЕРЦЕВОЇ
Authors: ВОЖЕГОВА Р.А. , ЛИХОВИД П.В. , ПІЛЯРСЬКА О.О.
Published: April 2023

Мета. М’ята перцева є однією із найбільш важливих лікарських та ефіроолійних культур в Україні та світі, тому вивчення особливостей формування її продуктивності є важливим завданням сучасної аграрної науки. У статті представлено результати математичної аналітики ефективності застосування різних доз мінеральних добрив NPK на посівах м’яти перцевої з огляду на врожайність сирої надземної біомаси культури. Методи. Узагальнені результати наукових досліджень, виконаних у різних куточках світу, було оброблено методами множинної регресії для побудови моделі врожайності культури залежно від доз NPK та апроксимації результатів математичного моделювання. Додатково було виконано перевірку гетероскедастичності вхідних даних моделі, та розраховано рангові кореляції. Результати. У результаті статистичних розрахунків за більшістю критеріїв нормальності розподілу даних та гетероскедастичності було відкинуто нульову гіпотезу щодо впливу мінеральних добрив на врожайність м’яти перцевої. Розраховані величини коефіцієнтів рангових кореляцій дозволяють стверджувати про визначальну роль фосфорних мінеральних добрив у продуктивності культури, у той час як роль калійних добрив є мінімальною та за окремими статистичними критеріями може бути описана як неістотна. Множинна регресійна модель урожайності м’яти перцевої залежно від доз внесення NPK мінеральних добрив має середню адекватність вхідному набору даних, але прогностична точність моделі є низькою. Коефіцієнти регресії множинної моделі підтверджують високу роль фосфорних добрив у формуванні продуктивності м’яти перцевої. Висновки. Таким чином, перспективними є подальші польові та вегетаційні досліди щодо формування продуктивності культури за внесення саме азотно-фосфорних мінеральних добрив, у той час як застосування калійних добрив на посівах м’яти перцевої з високою вірогідністю не матиме позитивного ефекту з огляду на продуктивність та економічні показники вирощування лікарської сировини.
АНАТОЛІЮ ВЛАЩУКУ ВИПОВНЮЄТЬСЯ 65 РОКІВ
Authors: ВОЖЕГОВА Р.А.
Published: April 2023

АНАТОЛІЮ ВЛАЩУКУ ВИПОВНЮЄТЬСЯ 65 РОКІВ
Kết hợp tách tín hiệu và lựa chọn anten cho hệ thống STBC-OFDM đa người dùng
Authors: Đức Lê Quang , Tâm Bùi Thanh , Nam Trần Xuân
Published: April 2023

OFDM  and  MIMO  are  the  two transmission  technologies  which  are  recently  being studied intensively. Combination of both technologies enables  higher  transmission  rates  over  frequency selective fading channels. Alamouti’s STBC is one of MIMO technologies selected for mobile radio systems. This  paper  presents  a  method  of  multiuser  detectionfor  combined  radio  systems  STBC-OFDM.  By  using the  antenna  selective  technology  proposed  in  the paper,  the  signal  detection  quality  is  enhanced considerably.  The  paper’s  results  also  present  those two  methods,  SNR-based  and  MSE-based  antenna selection, providing the best performance.
Một giải pháp suy diễn câu trả lời trong hệ thống hỏi đáp thông tin
Authors: Tươi Phan Thị , Thành Nguyễn Chánh
Published: April 2023

Question  Answering  (QA)  is  an important research field that research groups focuson to develop useful QA system for many languages in the world (English, Chinese, Japanese …) but just few for Vietnamese. One of most difficult processings in QAis the  answer  reasoning  applying  to  natural  language question, especially Vietnamese. The paper introduces an  approach  of  reasoning  answers  for  Vietnamese question  based  on  Graph  Theory  and  Artificial Intelligence (AI). The experimentation, which is done for  Vietnamese  questions  in  initial  phase,  shows  that the proposed approach is feasible for Vietnamese and it can be upgraded more for other languages in future.
Morphological and anatomical characterization of extrafloral nectaries of Opuntia streptacantha and Ferocactus recurvus (Cactaceae)
Authors: Sandoval Molina Mario , Morales-Rodríguez Simón , Janczur Mariusz
Published: April 2023

Background: The Cactaceae family displays remarkable diversity in the morphology of extrafloral nectaries (EFNs). Despite their taxonomic, ecological, and evolutionary significance, their anatomy and morphology are poorly understood. Questions: How are the morphological and anatomical attributes of extrafloral nectaries in Opuntia streptacantha and Ferocactus recurvus?Studied species: Opuntia streptacantha Lem. and Ferocactus recurvus (Mill.) Borg.Study site and dates: Helia Bravo Hollis Botanical Garden, Zapotitlan Salinas, State of Puebla, México, during 2017.Methods: EFNs samples were collected from the plants, fixed in glutaraldehyde, and processed for analysis using scanning electron microscopy and light microscopy.Results: In both species, EFNs are modified spines adapted for nectar secretion. In F. recurvus, they are elongated and blunt, and epidermal cells are wrinkled, forming a lump at the tip. In O. streptacantha, EFNs possess an apical secretory cone where nectar is stored and exuded. This region has globular and imbricated, bag-shaped epidermal cells without stomata. We distinguished three regions in these nectaries: an apical secretory cone, a middle elongation section, and a basal meristematic region. The apical secretory cone has globular epidermal cells that surround a lignified region of the spine. We could not detect vascularization in the extrafloral nectaries of O. streptacantha.Conclusions: This study reports, for the first time, the existence of EFNs in O. streptacantha and sheds light on the histological and morphological characteristics of EFNs in F. recurvus.Keywords: microscopy, nectar secretion, nectaries, secretory spines.
Presentación
Authors: Periodicos Portal
Published: April 2023

Presentación
O Fim da Civilização Moderna e o Percurso Formativo da Humanidade no Mundo Pós-Apocalíptico Imaginado pela Literatura Ocidental (1800-1950)
Authors: Buogo Igor de Mattia , Carola Carlos Renato
Published: April 2023

A modernidade ocidental é associada à imposição de novos valores ligados à religião, Estado, indivíduo, e também à imposição de fronteiras entre cultura e natureza. Ao longo do século XVIII e XIX, a hegemonia da sociedade moderna vislumbrou seu ápice. Nesse contexto histórico de transformações culturais, surgiram textos literários do gênero “pós-apocalíptico”, imaginando o fim do mundo não por elementos divinos associados à escatologia religiosa, mas através da ideia de “Natureza” e suas potencialidades destrutivas, como desastres ambientais e epidemias. O presente trabalho aborda algumas visões presentes em tal literatura como fruto de ansiedades para com o futuro e leituras críticas do mundo moderno. Nossa hipótese é de que o “apocalipse secular” literário representa, sobretudo, o fim do moderno, de seus valores e crenças, quando levados à exaustão. Pensamos a literatura pós-apocalíptica na perspectiva da História Ambiental e da Ecocrítica, visando explicitar a percepção crítica da civilização moderna e a projeção de um futuro ambiental do planeta em que a natureza selvagem restaura sua hegemonia, conforme imaginado por escritores de língua inglesa, em obras escritas entre os anos 1800 e 1950.
Memória, Natureza e o Ensino da Educação Ambiental
Authors: Souza Juliana da Costa Gomes de
Published: April 2023

Book Review
Ely Bergo de Carvalho, Ensino de História e Educação Ambiental, 1a ed. (Belo Horizonte: Fino Traço, 2021). 185p. ISBN-13 978-65-89011-34-7.
Migración, Medioambiente, y Formación Estatal en la Bolivia Post-Revolucionaria
Authors: Soliz Carmen
Published: April 2023

Book Review
Landscape of Migration: Mobility and Environmental Change on Bolivia’s Tropical Frontier, 1952 to the Present. By Ben Nobbs-Thiessen. Chapel Hill: University of North Carolina Press, 2020, p. 342
Miradas no Antropocéntricas a las Pandemias por Venir: Parentesco y Topofilia
Authors: Rodríguez Gabriela Alejandra Vázquez
Published: April 2023

La pandemia causada por el covid-19 es una manifestación de la crisis ecológica en la que nos encontramos, y cuyo origen último puede rastrearse en la ontología basada en el excepcionalismo humano. Este texto se hace eco de la perspectiva de las humanidades ambientales y aborda dos conceptos pertinentes, el parentesco y la topofilia, para resignificar la interdependencia de la humanidad con el resto del entramado de la vida y los elementos abióticos que la sustentan. Asimismo, se propone al duelo como un elemento que puede acercarnos a este entramado vital mediante el restablecimiento del parentesco y el arraigo. Se concluye que la prevención de las pandemias futuras necesita de la extensión del parentesco a lo no humano.
From Fenben to Digital Dunhuang Material Pool: Innovations in Art Production through Transformation of Producing Media
Authors: Ren Ruiqi
Published: April 2023

Fenben was an indispensable medium for the ancient Dunhuang artisans before painting the wall. While Digital Dunhuang·Material Pool, which relies on 3D laser scanning, digital storage, and blockchain, is a new medium for art production in the advanced technological context. Combining desk research and case studies, using Fenben and the Digital Dunhuang·Material Pool as examples, this research focuses on the medium's origin, content, form, and application to practical art production, analyzing the prescriptive nature of the different mediums and their corresponding shaping of art production patterns. In conclusion, the research argues that the Digital Dunhuang·Material Pool echoes Fenben in an inter-temporal way while transforming the “readable”  world of the Buddha on the wall into the “writable”  cultural object on the blockchain, thus providing a compliant medium for cultural enthusiasts to create secondary artworks around Dunhuang, which is a vivid practice in the democratization of art production through the development of contemporary media.
Precarity and Struggles of Employment: A Case Study of Undergraduates in Hong Kong
Authors: Cheng Shuk Ling , Kubanychbekova Aigerim
Published: April 2023

Despite having acquired an education that should prepare them for the workforce, many fresh graduates are facing difficulties in securing gainful employment in Hong Kong. Drawing on the concept of “employment precarity”, this study examines the predicaments that fresh university graduates encounter in Hong Kong in relation to social identity transition and job-seeking barriers. Using Critical Discourse Analysis, the researchers adopt a qualitative methodology to examine the written reflections of eight undergraduate students at a university in Hong Kong. (1) The findings reveal that students experience frustration, anxiety and uncertainty during the transition, indicating a need for improvement in the current pedagogical policies. (2) Recommendations are offered for higher education policymakers and universities to help alleviate these hardships. New sets of pedagogical strategies are developed to mitigate graduates’ exposure to employment precarity and to enhance their employability.
Probing the Role of Writing Tasks in Furthering Self-directed, Self-Corrective Problem-Solving Skills among Undergraduate Students
Authors: Sharadgah Talha A. , Sa'di Rami A. , Yaseen Maha S.
Published: April 2023

Problem-solving skills are of paramount importance in university education, and they are used as some of the salient parameters to gauge learning outcomes. In this vein, this quasi-experimental study seeks to assess and evaluate the relationship between the writing tasks that college students perform in class and their higher-order thinking skills such as critical thinking and problem-solving (PS) skills. The chief concern of this article is to find out to what extent problem-solving skills, including analysis, evaluation, explanation, and deduction, among university students can be expedited through writing tasks aimed at addressing and tackling problems and obstacles facing students on campus. 196 students from the College of Applied Studies at Al-Kharj (CASK) in Saudi Arabia are the subjects of this study. The subjects were split at random into two groups: control group (n=98) and intervention group (n = 98). The research method used was both quantitative and qualitative. Students in the two groups took a pre-test and a post-test. The researchers assessed the PS skills against the Facione and Facione (1994) scoring parameters. The findings show that there is a strong connection between writing tasks on topics of problems and obstacles and PS skills. The statistics showed a significant improvement in PS skills among the intervention group as opposed to the control group in analysis, evaluation, explanation and deduction. This study recommends that more research be conducted on the correlation between writing tasks aimed at addressing problems/dilemmas and other higher-order thinking skills.
Tourism Growth and Financial Sector Development Nexus: Evidence from Selected African Economies
Authors: Kapaya Saganga , Mugobi Thereza Israel
Published: April 2023

This article tests the tourism growth and financial sector development nexus. Data came from the World Bank and IMF for the years 1995-2020 from 43 selected African economies. We applied System GMM and dynamic CCEMG to estimate short–run effects and JKS Granger non-causality test for causality, FMOLS and FGLS to estimate long–run effects and sets of co-integration tests for co-movements. The findings support mutual reinforcing effects for both inbound tourism growth and financial sector development. Outbound tourism should be monitored and controlled for its negative effects; inbound tourism should be facilitated and promoted for its positive effects. Political stability and trade openness policies should be a priority for both sectors, while foreign direct investments should be monitored and controlled for their ambiguous impacts. In this work, we are able to show that increases in international tourism activities and developments in the financial sector mutually impact each other.
Climate Change and Corporate Regulation in Angola: Reforming the Regulatory Framework for Climate Change Mitigation
Authors:   Law School, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.  Email: k.o.kila@hud.ac.uk, Kila Kikelomo Oluwaseun
Published: April 2023

Angola, like many African countries, continuously suffers the deleterious impacts of climate change despite its minimal global carbon contributions. Despite this, it has not taken active steps to institute a climate change regulatory framework or established any strong regulatory regime to aid the regulation of corporate activities and participation in mitigation projects in the country. This article examines the regulatory landscape of climate change and corporations in Angola and assesses the country’s ability to tackle the challenges posed by climate change. It examines the country's position in the international climate change arena and scrutinizes the contribution of corporations to Angola's carbon emissions. The absence of legislation on climate change in Angola creates a void which allows corporations in the country to avoid any responsibility for mitigation projects and activities. This article, therefore, analyses the strengths and weaknesses of the alternative regulatory frameworks such as judicial, market, and surrogate regulation that can operate to fill this void and the extent to which they curtail corporate excesses in climate change and incentivise participation in mitigation activities. In scrutinising the deficiencies of Angola’s climate change regulatory framework, the article adopts the dilute interventionism model which employs both prescriptive and facilitative measures to regulate corporations and mitigate the impact of climate change. It highlights the structure of the legislative framework, regulator, and technical expertise necessary for the successful implementation of the said model. Additionally, the article argues in favour of adopting a veto firewall protection to maintain the independence of the proposed sole independent regulator to be responsible for regulating the climate change activities of corporations in Angola.
An Exploration of the Occupational Needs of College Students
Authors:   , Gabon Christian , Brady Jennifer , Antonio Kaela Jules , Lehnen Kayla Twite , Go Beatriz
Published: April 2023

This paper analyzes the barriers and supports for Dominican University of California students in meeting their occupational needs and what services might be beneficial to them. To be able to answer this question, we conducted a survey using convenience sampling with twenty-seven Dominican undergraduate students, interviewed staff, and conducted a focus group with the students who participated in the survey. Our results indicated four main themes which include: occupational needs, barriers to meeting occupational needs, supports to meeting occupational needs, and services recommended. For the implications for occupational therapy, we found that OTs are beneficial in several aspects of students’ lives and can be implemented on and around the campus.
PENERAPAN LEISA UNTUK SCALE UP PRODUK DAN PENINGKATAN KAPASITAS KEWIRAUSAHAAN PETANI MELENIAL DESA BALUNIJUK
Authors: Astuti Rufti Puji , Lestari Tri
Published: April 2023

PENERAPAN LEISA UNTUK SCALE UP PRODUK DAN PENINGKATAN KAPASITAS KEWIRAUSAHAAN PETANI MELENIAL DESA BALUNIJUK
Pemberdayaan Masyarakat dalam Upaya Restorasi Lahan Pasca Tambang di Desa Bukit Kijang, Kecamatan Namang, Kabupaten Bangka Tengah
Authors: Hayati Laila , Herdiyanti Herdiyanti , Wilujeng Panggio Restu , Cholillah Jamillah
Published: April 2023

The program aims to tackle the issue related on the low level of participation of the people in the restoration program on the post-mining land. Empowerment program was provided as the solution to increase the participation level of the people. It was expected that the welfare of the society would improve by utilizing the post-mining land. The beneficiary was people in Desa Bukit Kijang who were affected by the mining activities. Socialization approach was applied related with the effort on restoring the post-mining land. The result of the program was that the participation of the people in the activity had increased. Thus, it was suggested that the policy maker could ensure the empowerment program on the restoration of post-mining land should be massive, systematic and sustainable.
Autumn food of rock ptarmigan Lagopus muta: the effect of age, sex, year and location
Authors: Dépré Chloé , Nielsen Ólafur K.
Published: April 2023

We analysed food data for rock ptarmigan Lagopus muta collected during a 10 day period at the end of September and beginning of October 2006–2014 in northeast Iceland or for nine years. The total sample was 679 birds, including 455 juveniles and 224 adults; the annual range was 48–88 birds. To describe the importance of items consumed we used percentage by dry biomass (total 1399 g) and percentage by frequency of occurrence. A total of 80+ species were identified, the most important were Betula nana (27% biomass, 62% frequency), Empetrum nigrum (14%, 63%), Dryas octopetala (11%, 64%), and Salix herbacea (10%, 41%). Important plant parts consumed were berries, woody shoots with buds, buds, catkins, seeds and leaves. Difference in diet, both with respect to species and plant parts consumed, depended on year and altitude of collection site but not on ptarmigan sex, age or sex*age interaction. The only significant age difference observed was that juveniles consumed more seeds and less woody parts than did adult birds. Betula spp. dominated the diet in five years and Salix spp. in four years. Betula and Vaccinium spp. were most important at low and medium elevations but Salix spp. showed an opposite pattern. Berries (E. nigrum and Vaccinium spp.) were the dominant plant parts in the diet for six years and woody parts of Salix and Betula spp. in three years. Berries dominated in the diet at low to medium elevations and woody parts showed an opposite pattern.
Ethnomathematics of Kalimantan Batik in field Geometry learning in elementary school
Authors: Sudrajat Sudrajat , Winarto Andi , Wicaksono Bintang
Published: April 2023

This article examines the use of ethnomathematics in Kalimantan batik in learning geometry in elementary schools. The purpose of this paper is to explore mathematical concepts contained in the Kalimantan batik motifs that can be utilized in the process of learning geometry in elementary schools. This research uses exploratory research and an ethnographic approach. The research data were obtained from literature studies, observations, interviews, and documentation. Based on the results of the study this study obtained 6 types of Kalimantan batik motifs, namely Tidayu batik motif (West Kalimantan), spot yarn motif (Central Kalimantan), Empiek Batik motif (East Kalimantan), clouded motif batik motif (West Kalimantan), Sasirangan batik motif Hiris Pudak (South Kalimantan), Pating Muang batik motif (Central Kalimantan). Geometry concepts for elementary school children in Kalimantan batik motifs are rectangles, circles, triangles, points, lines, minimum and maximum curves, reflection, translation, and fraction numbers. The alternative steps of learning are as follows: (1). Students and teachers carry out learning with the question and answer methods related to Kalimantan batik motifs; (2). Students are asked to observe the Kalimantan batik motif; (3). Students are asked to analyze the shapes contained in the Kalimantan batik motif; (4) Students are asked to present their work.
Ethnomathematical exploration of the “Ompangan” tradition of the Jember Madura community
Authors: Wahyuni Indah , Apriyono Fikri , Anggriani Dita Loka
Published: April 2023

Culture is closely related to the lives of Indonesian people, in the current era of technological sophistication, culture is one of the means to study science, one of which is ethnomathematics. Ethnomathematics is a branch of mathematics that uses culture as a means to deepen the knowledge and concepts of mathematics education through the role of culture in society. This study focuses on the ethnomathematical exploration of the “ompangan” tradition of the Jember Madura community in Kalisat with the aim of describing ethnomathematics in the ompangan tradition of the community and formulating the concept of mathematical calculations. This research took place at Jalan Diponegoro Dusun Krajan 1 RT/RW 012/004 Glagahwero Kalisat. This study uses a qualitative method with a descriptive approach, with data collection techniques through interviews and observations. The results showed that the ompangan culture contained mathematical concepts in it that linked culture to the mathematical counting process, namely the concept of worth comparison and a system of linear equations used to determine the number of goods with the same price or value.
The development of Newton’s method by enhancing the starting point
Authors: Nabiyah Ismi Ratin , Salim Opim , Tulus Tulus
Published: April 2023

In general, nonlinear problems cannot be solved analytically. A special theory or method is needed to simplify calculations. Many problems that are too complex, an exact solution is needed to support numerical solution. There are many numerical methods that can be used to solve nonlinear problems, including the Bisection, Secant and Newton methods, also known as the Newton-Raphson method. However, these methods cannot be used for large-scale of nonlinear programming problems; for example the Newton-Raphson method which does not always converge if it takes the wrong initial value. The Newton-Raphson method is widely used to find approximations to the roots of real functions. However, the Newton-Raphson method does not always converge if it takes the wrong initial value. Therefore, it is necessary to develop the Newton-Raphson method without using other methods in order to have a higher convergence. This research is a literature study compiled based on literature references with the initial step of understanding problems that appear from the use of Newton's method, it is base on the problem of divergence or oscillation. Newtonian method was developed without modification of other methods, but took two starting points. Then prove the super-quadratic convergence of the proposed method by extending the Taylor expansion and giving or assuming the error rate. After that, the stability test of the proposed model is carried out and provides an example of the application by solving the root search using Newton's method and the proposed method can be seen as a comparison.
Gumpang Temple as a source of ethnomathematics learning
Authors: Sutrimo Sutrimo , Kamid Kamid , Asrial Asrial , Hariyadi Bambang
Published: April 2023

This study aims to explore the Gumpang Temple as a source of learning mathematics for geometry in junior high school. The form of learning that comes from nature is ethnomathematics. The researcher describes how the Gumpang Temple will be a fun and exciting source of learning. This study uses a qualitative approach. Data collection was obtained by observation and literature sources. The data findings were analyzed using qualitative data analysis with descriptive methods. The results of this study indicate that the wealth of ethnomatematic literature using Gumpang Temple is quite a lot. Various approaches and formulas can be applied to the teaching of geometry. These findings lead researchers to conduct further research to explore the manufacture of teaching materials using different research approaches.
Geology, magmatism and specific features of mineralization of Bakyrchik ore field (Eastern Kazakhstan)
Authors: Mizernaya M. A , Miroshnikova A. P , Mizerny A. I , Zikirova K. T , Chernenko Z. I
Published: April 2023

Purpose. Determination of the features of the formation of gold mineralization within the Bakyrchik ore field and the influence of deep intrusive rocks on the formation of ore bodies. Methodology. Analysis of literature data, interpretation of geophysical studies, field work and laboratory studies on the mineralogical composition of ore bodies and dikes of the Kunush complex (ISP-MS ‒ Agilent 7500cx), study on the main types of mineral associations and zone of alteration (JSM 6390LV)). Findings. Peculiarities of geology, magmatism and ore formation of one of the gold ore deposits of the mesothermal class in the Bakyrchik black shales, located in the West Kalba metallogenic zone (WKMZ) in East Kazakhstan, are considered. Originality. All geological and industrial types of gold mineralization known in the territory of Western Kalba are divided into several levels according to their priority. The most promising, but, despite many years of study, underexplored level is represented by the Bakyrchik ore district. Practical value. The connection of the gold mineralization of the Bakyrchik deposit with zones of tectonically weakened lithosphere and with hidden granitoid intrusions identified by geophysical data is emphasized, which will allow using these data for further exploration within the Western Kalba.
Influence of underground mining activities on the topographic surface, case study of Nui Beo Coal Mine (Vietnam)
Authors: Vu Tien Trung , Pham Hung Duc
Published: April 2023

Purpose. Coal mining activities by underground mining method will disrupt the equilibrium of the surrounding rock mass. In underground mining, determining the influence zone of exploiting the longwall on the topographic surface is extremely important.Through analyzing the displacement and deformation of the rock mass when exploiting the longwall 21103 in Seam 11 at Nui Beo Coal Mine, the influence is to be determined of exploiting this longwall on the topographic surface in order to forecast the boundary of the influence zone that may affect the surface works, ensuring the safety of such works. Methodology. To achieve the research results, actual field survey methods, data analysis and numerical modeling methods are used in this article. Findings. Analysis of the results from the numerical model determined that the total height of the collapsed and cracked area when exploiting the longwall 21103 in Seam 11 is about 85 m. The subsidence to the ground is about 10 cm from the center of the subsidence area. The analysis results from the numerical model also show that the roof collapse angle is 69°, thereby determining the area of influence on the topographic surface in the range of 55 m. Results on the cross-sections show that the boundary of the influence of mining on the topographic surface is the closest section 6–6, which is about 12 m. The stability time of the collapsed rock mass is determined to be about 5 months. Originality. On the basis of UDEC (Universal Distinct Element Code) software, the authors have developed a simulation model for the mining process of the longwall 21103 in Seam 11. Analysis of the results from the model has shown the state of displacement and deformation of the surrounding rock mass. In this study, the numerical modeling method is applied to simulate the displacement of the longwall, which is consistent with the actual production of the underground mine. This enabled the authors to assess and identify the affected area with the required degree of reliability. Practical value. The research results of the paper are used as a basis for implementation in actual production at Nui Beo Coal Mine. On the basis of the analysis of the surrounding rock mass displacements and deformations, when exploiting the longwall 21103 in Seam 11 at Nui Beo Coal Mine, the affected boundary of the topographic surface has been determined. At the same time, the stability time of the collapsed rock mass is also calculated. So, this is also the basis for Nui Beo Coal Mine to plan construction works on the site outside the determined affected areas to ensure the safety of such works.
Using nonlinear ultrasonic measurements to estimate parameters of the sedimentation of slurry solid phase in thickener
Authors: Morkun V. S , Morkun N. V , Tron V. V , Serdiuk O. Y , Haponenko A. A
Published: April 2023

Purpose. Improvement of the method for estimating sedimentation process parameters of the slurry solid phase particles in thickener on the basis of measurements of the nonlinear characteristics of ultrasonic waves propagating in a controlled medium. Methodology. The following methods were used: analysis of scientific results and practical developments; methods of mathematical statistics for evaluating the results of experiments; methods of analytical synthesis; methods of numerical modeling for the synthesis and analysis of a mathematical model. Findings. It was established that the nonlinearity of the process of propagation of ultrasonic waves in ore slurry, which is determined by the number and size of crushed ore particles in it, can be estimated by determining the amplitudes of several harmonics of the measured acoustic signal. This approach allows maintaining the productivity of the desliming process in accordance with the characteristics of the ore suspension, without allowing the loss of valuable components. Obtaining real-time information about the characteristics of the particle sedimentation process in the ore suspension at the initial stage enables reducing the duration of transitional processes in the control system. Originality. The method for estimating the parameters of the deposition of the solid phase of the pulp in the thickener has been improved, which is based on the fact that the nonlinearity of the process of propagation of a controlled ultrasonic signal in the thickener; this leads to modulation of the generated ultrasonic packet and, consequently, the appearance of higher harmonics. To obtain a more accurate estimate of the nonlinearity of this process, all the values obtained must be normalized to represent only the relative changes in the acoustic nonlinear response. Practical value. A system for automatic control of the thickener operation is proposed, which uses nonlinear ultrasonic measurements to estimate the parameters of the sedimentation of the solid phase of the pulp in the thickener. According to the results of industrial tests of the system of automatic control of the thickener based on ultrasonic control devices, it was established that its use as part of the automated control system for the technological processes of beneficiation of iron ore raw materials at the ore beneficiation factory of the Northern mining works will allow reducing water consumption by 3.5 % and iron-magnetite losses by 0.6–0.7 %.
Peculiarities of thermomodernization of the heating system of military infrastructure complexes
Authors: Bulhakov R. V , Rabocha T. V , Frolov O. S , Ventsyuk A. V
Published: April 2023

Purpose. To develop a solution for modernization of heat supply systems (HSS) of infrastructure complexes including, in particular, in military towns (MT), the problem of both efficient and effective heating of which is especially important at present. To develop a mathematical model for finding an effective solution to the problem of modernizing heating and detecting leaks of the heat-conductor. Methodology. Special and general methods are used: mathematical formalization – to build mathematical model of the problem of heat supply of MT and detection of heat-conductor leaks; induction and deduction – for choosing and substantiating the expediency of using equipment for HSS of MT; analysis and synthesis – for the development of a schematic solution HSS of MT. Findings. Decision options regarding the choice of heat-generating equipment for the modernization of HSS of MT are substantiated. A combined system using boilers and solar collectors is proposed. For the combined system, a schematic solution for integrating equipment into a single autonomous HSS of MT and an economical option for automatic system control are developed. For boilers of the combined system, it is suggested to use cheap and affordable fuel – pellets. A mathematical model has been developed for finding an effective system solution for HSS of MT and detecting heat-conductor leaks. Originality. Special requirements for HSS of MT were formulated: autonomy; high level of reliability, survivability; flexibility in ensuring the volume of heat supply during the day, week, season; minimizing the cost of equipment and fuel for it; the possibility of inexpensive repair and renewal. Variants of modernization of HSS in MT have been analyzed and a schematic solution of an integrated HSS of MT with combined use of generating equipment has been developed. Practical value. The developed mathematical model and schematic solution of HSS in MT as well as proposed options for using equipment and fuel for it allow ensuring the proper level of fulfillment of special requirements for HSS in MT.
Improving the environmental efficiency of glass furnace chimneys using heat recovery technologies
Authors: Fialko N. M , Navrodska R. O , Shevchuk S. I , Sbrodova G. O
Published: April 2023

Purpose. Improving the conditions for dispersing harmful emissions from gas-consuming industrial furnaces based on the development of new complex methods for their greening using modern energy-saving technologies. Methodology. The known methods of heat exchangers and chimneys thermal calculation and methods for dispersing harmful emissions from thermal-energy plants in the environment were used. Findings. Calculative studies were carried out on improving the chimneys operation safety of glass furnaces of regenerative type when using technologies for waste heat recovery of furnace gases using water-heating and air-heating heat exchangers and chimneys of various designs. The influence of design features of chimneys on their operating modes when using heat recovery technologies with water and air heat recovery units has been studied. In order to improve the environmental efficiency and operational reliability of chimneys, it is proposed to use the thermal method of bypassing part of exhaust gases from regenerators past the heat recovery equipment in the heat recovery technologies. The effectiveness of this method for improving the dispersion in the ground-level of harmful emissions from furnaces when using the proposed heat recovery systems has been analyzed. Originality. For the first time, the application efficiency has been investigated of the proposed greening methods to improve the dispersion conditions of harmful emissions of gas-consuming glass furnaces in the environment under the conditions of using heat recovery technologies. Practical value. The results obtained will be used in the development of energy-efficient gas-consuming thermal installations for technological purposes.
ANALISIS FAKTOR KETERLAMBATAN PROYEK KONSTRUKSI DI KOTA BALIKPAPAN
Authors: Dimas Adhitya Putra  , Oryza Lhara Sari  , Raftonado Situmorang
Published: April 2023

Dalam dunia proyek konstruksi, selalu terdapat waktu yang merupakan komponen terpenting dalam keberhasilan suatu proyek. Namun kenyataannya secara umum di lapangan, terdapat banyak proyek yang tidak selesai tepat waktu atau mundur dari waktu yang telah ditentukan sehingga pelaksanaannya mengalami keterlambatan. Dalam hal ini banyak proyek yang biasanya terjadi keterlambatan pada proses pelaksanaannya seperti proyek-proyek yang ada di Kota Balikpapan. Tujuan penelitian ini adalah untuk mengetahui faktor-faktor yang mempengaruhi keterlambatan proyek konstruksi, dan mengetahui faktor yang paling dominan dalam menyebabkan keterlambatan proyek konstruksi di Kota Balikpapan. Metode yang digunakan dalam penelitian ini yaitu dengan menggunakan metode penyebaran kuesioner yang selanjutnya dilakukan analisis data berupa uji validitas, uji reliabilitas dan analisis faktor dengan menggunakan program bantu IBM SPSS V27. Setelah dilakukan analisis diperoleh 7 faktor yang mempengaruhi keterlambatan proyek konstruksi di Kota Balikpapan yaitu kelalaian/keterlambatan pekerjaan oleh subkontraktor (A6), tidak tersedianya bahan secara cukup pasti/layak sesuai kebutuhan atau kekurangan material konstruksi (B1), jumlah material yang datang tidak sesuai (B6), kerusakan peralatan (C2), perubahan desain oleh owner (D1), kesalahan dan ketidaksesuaian desain (D5), dan metode konstruksi/pelaksanaan kerja yang salah atau tidak tepat (E5). Selain itu, dari penelitian ini juga diperoleh faktor yang paling dominan dalam menyebabkan keterlambatan penyelesaian proyek yaitu faktor kesalahan dan ketidaksesuaian desain (D5).
"Everything comes from somewhere"
Authors:   , Mulder Annemieke Christine
Published: April 2023

The emergence and spread of infectious diseases, especially zoonoses, is complex
and depends on various determinants or drivers, including their interrelations
at the human-animal-environment interface (HAEI). This thesis provides novel
insights into the potential role of environmental transmission in the epidemiology
of selected exemplary zoonotic pathogens (i.e. Campylobacter, Shiga toxin-producing
E. coli O157, and non-typhoid Salmonella) that are typically considered as foodborne
pathogens. This was done mainly by studying some of their characteristics in the
environment and the spatial associations between their incidence among human
cases and the level of exposure to local livestock density, using novel methods within
an eco-epidemiological framework. In addition, this thesis explored the potential
human health effects linked to extreme rainfall events and the spatial association
between the urban-rural gradient and the diversity and composition of the human
gut microbiome.

Chapter 2 showed that direct exposure to pluvial floodwater, and activities leading to such exposure, are associated with an increased risk of developing acute gastroenteritis (AGE) and acute respiratory infection (ARI). Chapter 3 showed that surface water is mainly contaminated with Campylobacter originating from meat-producing poultry (i.e. broilers and turkeys) in areas with high poultry densities and from wild birds in recreational waters and WWTP discharge points. The results of Chapter 4 and 5 revealed that human STEC O157 infections can be caused by environmental exposure to small
ruminants besides food, while the route of transmission of Salmonella and Campylobacter
to humans is mainly foodborne. Chapter 6 revealed that bacterial diversity, richness and composition of the adult gut microbiome are associated with the urban-rural gradient in the Netherlands.

This thesis showed that we cannot ignore the role of the environment in mediating the transmission of (foodborne) zoonotic pathogens from livestock and wildlife, and more holistically in shaping the human gut microbiome. However, evidence about specific routes of transmission (e.g. air-borne, via soil or water) and their relative importance, was not provided. To study all interactions between different drivers of zoonotic pathogens, we recommend future studies to focus on pathogen transmission and their related transmission pathways to be able to look beyond the three drivers of change included in the One Health disease triangle (humans, animals, environment). This can be visualized by including a white triangle based on the Gestalt idea that the sum of visual perception is more than its parts. This triangle illustrates the interactions to include to study zoonotic pathogens and provide a complete picture of how they may influence one another. This visualization can be considered as a first step towards further unraveling the complexity of zoonotic pathogens by showing “the complete picture” or at least an attempt to do so, to, in the end, achieve optimal health outcomes.