bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGGUNAAN MEDIA MINIATUR TERHADAP AKTIVITAS BELAJAR PADA ANAK USIA 5-6 TAHUN DI TAMAN KANAK-KANAK ISLAM BINA EMPAT LIMA PONTIANAK
Authors: JULINDA JULINDA , DIANA DIANA 
Published: December 2024

Penelitian ini dilatarbelakangi oleh masih rendahnya aktivitas belajar anak dalam melakukan kegiatan pembelajaran, aktivitas tersebut meliputi aktivitas memperhatikan, mendengarkan, menjawab pertanyaan, dan mengajukan pertanyaan. Tujuan dari penelitian ini adalah untuk memperbaiki kegiatan belajar yang akan meningkatkan aktivitas belajar anak usia 5-6 tahun dengan menggunakan media miniature di Taman Kanak-kanak Islam Bina Empat Lima Pontianak. Metode yang dipakai pada penelitian ini adalah Kuantitatif dengan metode eksperimen. Adapun yang menjadi subyek penelitian ini adalah observasi, wawancara, dan dokumentasi. Dari hasil penelitian, data pre-test dan post-test dilakukan dengan perhitungan uji-t dengan hasil t-hitung sebesar -11,393 dan t-tabel sebesar 2,119. Berdasarkan hipotesis jelas bahwa t-hitung lebih besar dari t-tabel ini berarti terdapat pengaruh penggunaan media miniature terhadap aktivitas belajar pada anak usia 5-6 tahun .
Characterization of Andiroba Oil Production (Carapa guianensis AUBL.) Of Riverside Women Communities of Mutuacá Island, Cametá-PA
Authors: Damasceno Daniel Cardoso , Pina Eridete Arnaud de , Silva Ewerton Afonso Silva da , Sousa Fagner Freires de , Silva Jocelma Boto , Jesus Rosana Texeira de 
Published: December 2024

Objective: This study aimed to understand the importance of andiroba oil production by riverside women of Mutuacá island from the municipality of Cametá-PA in addition to describe the oil production steps.

Theoretical Framework: Extractive process was understood as first form of economic exploitation, limiting the collection of products existing in nature, with low productivity mainly in off-season of product, the need to rationalization and source in income for traditional populations of the riverside areas.

Method: The construction and production of information and data methodology adopted was qualitative and quantitative research modality. Data collection was conducted by participant observation and open-ended interviews. It was possible to identify and describe the artisanal extraction of andiroba oil process and its importance in the riverside women´s lives. The research included on 26 women extractivists participation who worked in the collection and processing of seeds.

Results and Discussion: The results obtained revealed that age range of extractivists varied within the 21 to 60 years old, that in all production stages, female gender stands out considerably and that the peak of seed fall occurs in December month, the rainiest time of the year, when the açaí fruit harvest is ending.

Research Implications: The research stands out that women extractivists have taken the role over main character in andiroba oil production, which involves on female empowerment, good seed processing practices and financial management.

Originality/Value: This study contributes to use of good management practices to facilitate licensing, certification and improvement of quality seals, making the product and by-products more valued, thus guaranteeing financial resources for the sustenance of riverside families.
Оценка вариации влияния инфраструктурных и производственных инвестиций на региональный экономический рост
Authors: Павлова Татьяна , Цзюнь Ли , Нагапетян Артур 
Published: December 2024

The article evaluates the varying impact of infrastructure and manufacturing investments on regional economic growth. A competent and well-thought-out investment allocation policy is crucial for successful country development, making this paper relevant. The literature presents differing opinions on the impact of investment on economic growth, particularly regarding the prioritisation of financing production or infrastructure projects. The study attempts to address the issue of reverse causality and omitted variables in the framework of combating false positive and false negative relationships. This is achieved through modelling based on spatial autoregressive data analysis and the use of the instrumental variables’ method. The ultimate goal is to obtain more accurate estimates of the impact of the considered indicators on regional economic growth. The results indicate that a 1 percentage point increase in infrastructure investment leads to a 0.52 percentage point increase in economic growth, which is comparable to the 0.53 percentage point impact of production investment. It is concluded that achieving a balance between investments in production and infrastructure is necessary to ensure the conditions for long-term sustainable development of Russian regions.
Ectopic Cushing's Syndrome Due to Pancreatic Neuroendocrine Tumor: A Rarely Case Report
Authors: Dinh Duc Nguyen , Phuong Thao Bui , Thuy Duong Nguyen , Thi Luu Pham , Thi Huong Nguyen 
Published: December 2024

Both a non-functional neuroendocrine tumor that transforms into an ACTH-secreting tumor and ectopic ACTH-secreting Cushing's disease are extremely uncommon. We present the case of a 75-year-old female patient who underwent total surgery for a pancreatic neuroendocrine tumor that was discovered 11 years prior and was non-functional at the time of diagnosis. Five years ago, liver metastases were found, and they currently exhibit Cushing's syndrome symptoms that depend on ACTH. A presumptive diagnosis of a rapidly progressive, metastatic, functional pancreatic neuroendocrine tumor with ectopic ACTH secretion was made and biochemically and radiographically confirmed. However, due to health conditions and procedural risks, definite diagnostic methods have not been developed, such as liver biopsy. Conclusion: This report highlights the fact that it is unlikely that a neuroendocrine tumor of the pancreas may initially present with a functional hormonal syndrome, either from the primary tumor itself or from the metastatic secondary tumor.
Development of a Quantitative Method for Hydroxychavicol in the Ethyl Acetate Fraction of Piper betle L. Ethanol Extract Using High-Performance Liquid Chromatography
Authors: Thi Xuan Mai Nguyen , Le Ngan Mai , Van Khanh Nguyen , Thanh Binh Nguyen Thi , Hao Bui Thi , Quang Thao Le , Thanh Tung Bui 
Published: December 2024

In this study, we developed a quantitative analysis method for hydroxychavicol (HC) in the ethyl acetate fraction of the total ethanol extract of Piper betle using high-performance liquid chromatography. The stationary phase utilized a reversed-phase silica gel C18 column (5 μm x 4.6 mm x 250 mm), while the mobile phase consisted of acetonitrile and 0.05% orthophosphoric acid in water (30:70, v/v). The flow rate was set to 1 ml/min, with a chromatography run time of 20 minutes and a column temperature of 40 °C. Detection was carried out at a wavelength of 210 nm, corresponding to the maximum absorption wavelength of HC. The injection volume was 20 µl. The retention time for HC was about 14.03 minutes. Within the concentration range of HC from 7.68 to 276.50 µg/ml, there was a strong linear correlation between peak area and solution concentration. The method ensured specificity for HC, with high accuracy and precision, evidenced by a recovery rate from 98% to 102% and a relative standard deviation of repeatability ≤ 2%. The limits of detection and quantification were 0.87 µg/ml and 2.87 µg/ml, respectively.
Hydroxychavicol, quantification, high-performance liquid chromatography, Piper betle.
Refrigeration Characteristics of Vortex Tubes Under Various Operating Conditions: Experimental Study
Authors: Zhang Zongwei , Li Xiangjia , An Xuanyi , Meng Qingkun 
Published: December 2024

The refrigeration characteristics in a vortex tube are experimentally investigated to promote their application in aerospace engineering. The experiments focus on the effects of the inlet pressure ([Formula: see text] to 0.7 MPa), inlet temperature ([Formula: see text] to 70°C), cold outlet pressure ([Formula: see text] to 0.7 MPa), and the cold mass fraction ([Formula: see text] to 0.9). The experimental results reveal that, maintaining the same cold mass fraction, elevating the inlet pressure below 0.4 MPa leads to a substantial increase in temperature reduction and cooling effectiveness. This enhancement becomes less pronounced when the inlet pressure surpasses 0.4 MPa. Raising the inlet temperature can enhance temperature reduction and cooling effectiveness. Increasing the cold outlet pressure tends to decrease the actual temperature drop. Although its influence on temperature efficiency is minimal, significant improvements in adiabatic efficiency and coefficient of performance are observed for cold mass fractions exceeding 0.6. Across all test conditions, there exists a critical cold mass fraction point that optimizes the refrigeration process. An empirical correlation formula was derived from experimental data, and its accuracy was validated through a comparative analysis between the experimental results and the predicted values.
Stem cell therapy approaches for non-malignant diseases & non-haematological diseases in India: A systematic review
Authors: Chavan Chandrashekhar , Ray Suman , Kumar Chandra Mohan 
Published: December 2024

Background & objectives
Our study aims to provide the diversity of stem cell use for non-malignant, non-haematological diseases in India through the lens of clinical trials.

Methods
A PRISMA approach was used to evaluate the safety and efficacy of stem cell use for the period 2001-2021 in India. The outcomes were measured using each disease category, types of stem cells, the origin of stem cells, safety, and efficacy.

Results
Of the 9206 studies screened, 61 studies that were relevant to stem cell use for non-malignant diseases were included for analysis. Autologous stem cells (75%) were used predominantly compared to allogenic stem cells (18.33%), followed by mixed type (6.67%). Use of bone marrow-derived stem cells (51%) was dominant, followed by melanocytes (19%), adipose (7%), haematopoietic (12%), and (11%) other types of stem cells. The study revealed 37 randomized clinical trial studies conducted in the government research hospital compared to the non-government.

Interpretation & conclusions
Maintaining the gold standard for stem cell therapy requires randomized clinical trials with large sample sizes, control groups, failures, adverse effects, etc. It is important to have a monitoring and regulation system in stem cell clinical research activities with enough preclinical data and repeated exchanges between the bench and the bedside.
СОВЕРШЕНСТВОВАНИЕ ТЕХНОЛОГИИ ВЫЕМКИ ЗАПАСОВ ЦЕЛИКОВ И СПОСОБА ПОГАШЕНИЯ ВЫРАБОТАННОГО ПРОСТРАНСТВА В УСЛОВИЯХ КЫШТЫМСКОГО ПОДЗЕМНОГО РУДНИКА
Authors: Кирилл Васильевич Барановский , Юрий Михайлович Соломеин , Юрий Георгиевич Антипин 
Published: December 2024

Для выемки подземных запасов переходной зоны (подэтажа 366/346 м) применялся вариант камерно-целиковой системы разработки, имеющий большую величину эксплуатационных потерь. ИГД УрО РАН разработаны основные технические решения по отработке жилы № 175 в этаже 346/316 м камерной системой разработки с последующим обрушением целиков, позволяющие значительно снизить потери балансовых запасов высокоценного кварца в недрах. Изложены основные положения и технические решения проекта по геотехнологическому и геомеханическому обоснованию безопасной и эффективной отработки запасов подэтажа 346/324 м. В соответствии с современными горнотехническими и геомеханическими условиями рекомендован поэтапный порядок отработки запасов целиков и погашения выработанного пространства подэтажа 346/324 м. Рассмотрены варианты отработки целиков и схем погашения выработанного пространства и проведено их технико-экономическое сравнение.
For extraction of underground reserves of interjacent zone (sublevel 366 / 346 m) a variant of room-and-pillar mining system has been used, it has a large amount of operational losses. IM of UB of RAS has developed a technical project with main technical solutions for excavating the reserves of vein № 175 on the level 346/316 m by chamber system of exploitation followed by the collapse of pillars, which allows to reduce significantly the balance reserve loss of high-value quartz in subsoil. The main principles of the project and technical solutions for geotechnical and geomechanical justification of safe and efficient development of reserves on sublevel 346/324 m are shown. Based on current miningtechnical and geomechanical conditions, a procedure for phased exploitation of pillar reserves and cancellation of worked out space on sublevel 346/324 m is recommended. The variants of pillars excavation and schemes of cancellation of worked out space have been examined and their technical and economic comparison has been conducted.
РЕЗУЛЬТАТЫ ЭКСПЕРИМЕНТАЛЬНОЙ ОТБОЙКИ ГРАНУЛИРОВАННОГО КВАРЦА ПЛОСКОЙ СИСТЕМОЙ ЗАРЯДОВ
Authors: Игорь Владимирович Соколов , Алексей Алексеевич Смирнов , Артем Андреевич Рожков 
Published: December 2024

В статье представлены результаты экспериментальных взрывов плоской системы зарядов в условиях Кыштымского подземного рудника. Основной задачей при этом являлось снижение выхода переизмельченной фракции кварца -20 мм. Была предложена и опробована конструкция рассредоточенного скважинного заряда без инертного заполнителя в воздушных промежутках. Проведено сравнение гранулометрического состава отбиваемой руды при различных конструкциях зарядов. Выявлена зависимость выхода фракций кварца от удельного расхода ВВ. Доказана техническая возможность повышения эффективности добычи ценного сырья при предлагаемой технологии и параметрах буровзрывных работ. Предполагаемый эффект от перехода на новый способ отбойки - снижение выхода переизмельченной фракции на 25 - 40 %.
The article gives the results of experimental explosions of a flat explosives system in the conditions of the Kyshtym underground mine. The main task here was to reduce the outcome of the overgrinding quartz fraction -20 mm. The design of the dispersed hole-explosive without any inert filler in air gaps was proposed and tested. The granulometric composition of the ore being broken off by various explosives structures was compared. The dependence of the output of quartz fractions on the specific consumption of explosives is revealed. The technical possibility of increasing the efficiency of extraction of valuable raw materials with the proposed technology and parameters of drilling and blasting operations is proved. The expected effect of the conversion to a new way of breaking is to be a reducing of the outcome of the overgrinding fraction by 25 - 40 %.
К ВОПРОСУ О СООТВЕТСТВИИ ТЕРМИНОЛОГИЧЕСКОЙ СИСТЕМЫ СОВРЕМЕННОЙ ГЕОМЕХАНИКИ ПРАКТИЧЕСКИМ ЗАДАЧАМ НЕДРОПОЛЬЗОВАНИЯ
Authors: Александр Евгеньевич Балек 
Published: December 2024

Представлен анализ базовых научных понятий и терминов, характеризующих напряженный массив горных пород как главный объект геомеханических исследований. В качестве взаимосвязанной системы рассмотрены нормативные определения основных терминов практической геомеханики: горная порода, грунт, массив горных пород, коэффициент структурного ослабления, представительный объем, структурный блок, породная отдельность, напряженно-деформированное состояние, поле механических напряжений, структурные и текстурные напряжения, поле деформаций, разрушение горных пород, горное давление, предельное состояние. Используемые в геомеханике прочностные характеристики горных пород, такие как кратковременная и длительная прочность, модуль спада, предельная и запредельная деформация, сопоставлены со сходными нормативными определениями, применяемыми в геотехнологии, а именно: контактной прочностью, крепостью, твердостью, дробимостью. Обосновывается принципиальная некорректность оценки физико-механических свойств и напряженно-деформированного состояния какой-либо отдельной точки горного массива без учета пространственных и временных масштабов рассматриваемого объекта недропользования и, соответственно, масштабов его взаимодействия с окружающей средой. Показана целесообразность унификации и приведения в единую терминологическую систему тех понятий и терминов, которые используются в настоящее время в геомеханике и геотехнологии.
The paper considers the analysis of basic scientific concepts and terms that characterize stressed rock massif as the main object of geomechanical researches. Normative definitions of the main terms of practical geomechanics are considered as an interconnected system. They include the following terms: rock formation, massif of rocks, rock mass, structure reduktion coefficient, representative volume, structural blocks, parting, stressed and strained state, mechanical stress field, structural stress, texture stress, deformation field, rock breaking, rock pressure, limit state. Strength characteristics of rocks used in geomechanics, such as: strength of rocks, long- and short-term strength of rock, decrease component, limit and overlimited deformation are compared with similar normative definitions used in geotechnology, such as: contact strength, toughness, hardness, crushability. The principal incorrectness of estimating of mechanical properties and stress-strain state of a specific point in the rock massif without taking into account the spatial and temporal scales of the ussued object, and scales of its interaction with the environment, is being substantiated. The expediency of unification and reduction of concepts and terms to a common terminological system for geomechanics and geotechnology is shown by the paper.
ОСУШЕНИЕ РУДНЫХ ТЕЛ В УСЛОВИЯХ ПОВЫШЕННОЙ ОБВОДНЕННОСТИ И ЗАКАРСТОВАННОСТИ НАЛЕГАЮЩЕЙ ТОЛЩИ
Authors: Виталий Вячеславович Мельник , Алексей Леонидович Замятин 
Published: December 2024

В статье приведен пример решения задачи снижения обводненности горных выработок за счет организации скважинного водозабора на земной поверхности. Представленный подход к решению задач осушения месторождений с использованием как аналитических исследований, так и применения современных технологий выявления структурных неоднородностей с помощью геофизических методов позволяет минимизировать затраты на отработку полезных ископаемых и повысить безопасность ведения горных работ.
The article gives an example of solving the task to reduce watering of mine workings by organization of the well water intake on the earth surface. The described approach to the solving the tasks of draining the fields using both analytical studies and the application of modern technologies to identify structural inhomogeneities by geophysical methods allows to minimize costs for geological exploitation of mineral resources and to improve safety of mining operations.
К ВОПРОСУ РАЙОНИРОВАНИЯ КАРЬЕРНОГО ПОЛЯ ПО КОЭФФИЦИЕНТУ СЕЙСМИЧНОСТИ
Authors: Игорь Алексеевич Аленичев 
Published: December 2024

Выполнен цикл сейсмонаблюдений для мониторинга устойчивости бортов карьера при производстве взрывных работ. Показана возможность районирования карьерного поля по коэффициенту сейсмичности для выявления наиболее сейсмовосприимчивых участков в карьере, вблизи которых производство взрывных работ следует выполнять с особой осторожностью. Получены зависимости скорости смещения в различных зонах карьера.
A serie of seismic observations to monitor the stability of the open pit walls during blasting operations have been performed. Possibility of zoning of the minefield through the seismicity coefficient has been shown to identify the most seismic-sensitive areas in the open pit near which blasting operations should be carried out with the special caution. Dependence of the displacement velocity in various zones of the open pit have been obtained.
АНАЛИЗ ИССЛЕДОВАНИЙ В ОБЛАСТИ КОМПЬЮТЕРНОГО МОДЕЛИРОВАНИЯ ПРОЦЕССА ВЫПУСКА РУДЫ ДЛЯ СИСТЕМ РАЗРАБОТКИ С ОБРУШЕНИЕМ РУДЫ И ВМЕЩАЮЩИХ ПОРОД
Authors: Владимир Викторович Лаптев 
Published: December 2024

Рассмотрены известные алгоритмы и инструменты компьютерного моделирования процесса выпуска руды при использовании систем разработки с обрушением. Результаты анализа показали, что современные подходы, как правило, основываются на расчетах по геометрическим параметрам фигур выпуска и используют стохастические модели. Это позволяет при вычислениях предсказывать основные показатели извлечения руды и строить планограммы выпуска. В статье обозначены недостатки существующих подходов, рассмотрены перспективы их развития, а также проанализирована возможность применения для моделирования программных продуктов, использующих метод дискретных элементов. В результате сформулированы задачи для создания инструмента, который при моделировании отображал бы физическую суть процесса выпуска.
In the article existing methods and tools of ore draw simulation for develope systems with ore caving have been considered. The results of the analysis have shown, that the current approaches to the simulation, as the rule, are based on calculations of geometric parameters of the shape of the draw envelope (ellipsoids) and use stochastic models. It allows to predict the results of the ore draw and to form the diagrams. The article outlines the deficiencies of existing approaches, discusses the prospects for their development; and the possibility of applying software products using the discrete element method for modeling has been analyzed. As a result, the tasks on creating a tool that can model the physical nature of the ore draw has been formulated
АНАЛИЗ УСЛОВИЙ ФОРМИРОВАНИЯ ФЛЮИДОУПОРОВ РИФОГЕННЫХ ЗАЛЕЖЕЙ ФРАНСКО-ФАМЕНСКОГО ВОЗРАСТА НА ТЕРРИТОРИИ САМАРСКОЙ ОБЛАСТИ
Authors: Анастасия Олеговна Вязовкина 
Published: December 2024

В статье рассмотрены геолого-геофизические критерии выделения биогермных построек и покрышек залежей биогермного типа. На основании данных глубокого бурения проведена стратификация разреза франско-турнейских отложений. Построена серия схем корреляции, пересекающих различные зоны (забортовую, внешнюю, внутренние бортовые и осевую) Муханово-Ероховского прогиба (МЕП). Определены типы разреза и мощность отложений малевского возраста, характерные для каждой зоны. По данным бурения построена карта толщин отложений малевского горизонта, на основании которой (с привлечением схем корреляции) проведена локализация зон предполагаемого развития «надежных» покрышек залежей, приуроченных к биогермным образованиям. Составлена схема развития отложений малевского возраста, характеризующая степень надежности покрышки относительно зон МЕП и органогенных построек.
The data of the 51 common-depth point data 3D (3D-CDP) method and 81 common-depth point data 2D (2D-CDP) method coverages, well logging, oil content, drill sample in the Samara region. Geological and geophysical criteria of organogenic (bioherm) structures and caprocks of organogenic (bioherm) type allocation were discussed in the article. Frasnian-Tournaisian deposits stratification was carried out based on deep drilling data. Correlation schema coset was built. It crosses various zones (on-board, external, internal side and center) of Muhanovo-Erohovskij mountain trench. Section types and deposits thickness of Malevskij Age for each zone were identified. Isopachous map of Malevskij deposits was built based on drilling data. Localization of trajectory reliable cover zones limited to bioherm structures was carried out on the basis of isopachous map and correlation schema. Sediments development scheme of Malevskij Age was built-up. It characterize a degree of reliability of caprock relative to the Muhanovo-Erohovskij mountain trench zone and compound it sedimentative structures