jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Dmytro Breslavsky | Pavlo Palamarchuk | Oleg Morachkovsky
Source: Bulletin of the National Technical University «KhPI» Series Dynamics and Strength of Machines (article, 2025-12-29)
Field: Materials Science — Materials Chemistry

CREEP AND DAMAGE OF FUEL ROD CLADDING UNDER STATIC AND CYCLIC LOADING The paper presents an approach to solving the problem of creep of the nuclear reactor fuel rod cladding under the conditions of its contact interaction with the fixing element using a specially developed user subroutine for the finite element analysis software. The cases of time-invariant and cyclic loading, which is caused by the action of the flow washing the fuel, are considered. The problem is solved on the basis of a full three-dimensional formulation, materials with isotropy of creep-damage properties are considered. In the case of analysis of cyclic deformation with accumulation of hidden damage, amplitude contact stresses and stresses arising during forced oscillations of the fuel rod are taken into account. To take into account the processes of accumulation of hidden damage due to creep, a specially developed subroutine is used to add to the calculation scheme the function of integration in time of the evolution equation for the scalar damage parameter. In this subroutine, in the case of taking into account the cyclic loading, a transition to the equivalent creep problem is also performed, obtained by using the method of two time scales and averaging over the period, the stress cycle asymmetry functions are determined for each integration point of the finite element model. The results of numerical simulation of the creep of the fuel cladding when it is in contact with the fixing element for the case of static and dynamic creep are obtained. The cladding material is zirconium alloy. In the case of taking into account cyclic loading, a significant acceleration of creep processes and accumulation of hidden damage and a reduction in the time to the occurrence of a macroscopic defect are demonstrated. The place of its occurrence is determined, which corresponds to the inner surface of the fuel cladding opposite the location of the fixing element. Creep ; Finite element method ; Cladding (metalworking) ; Subroutine ; Plasticity ; Isotropy ; Rotational symmetry ; Amplitude Nuclear Materials and Properties ; Nuclear Engineering Thermal-Hydraulics ; High Temperature Alloys and Creep
Authors: H Attjioui | Benomar Abdelhafid | Madiha Alami Chentoufi | Driss Soussi Tanani
Source: International Journal of Multidisciplinary Research in Arts Science and Technology (article, 2025-11-30)
Field: Chemistry — Physical and Theoretical Chemistry

INTEGRATION OF SIMULATION INTO THE TEACHING OF PHYSICAL AND CHEMICAL TESTING OF MEDICINES Quality control of medicines is carried out throughout the entire life cycle of a medicine. The physical and chemical tests defined in the monographs of the European Pharmacopoeia (Ph. Eur.) enable the identity, purity, content, and control of critical impurities of active ingredients and pharmaceutical forms to be verified. However, current teaching of these techniques is often limited to theoretical courses or practical laboratory work with limited resources. Educational simulation offers a modern alternative, allowing students to realistically reproduce physicochemical tests, analyze and interpret the results in accordance with European pharmacopoeia standards in an interactive and reproducible environment. This study presents a model for integrating simulation into the teaching of physicochemical testing applied to drug control, detailing the methodology, observed results, educational benefits, and prospects for improving training. Pharmacopoeia ; Work (physics) ; Control (management) ; Pharmaceutical technology ; Test (biology) ; Chemist Various Chemistry Research Topics ; Safe Handling of Antineoplastic Drugs ; Drug Solubulity and Delivery Systems
Authors: Artem Chmeruk | D. Jones | R. Balducci | J. Ebad-Allah | F. Beiuşeanu | F. Schilberth | M. A. Kassem | U. Schade | Alexander Veber | Ljiljana Puškar | Y. Tabata | T. Waki | Hiroyuki Nakamura | C. A. Kuntscher | A. Östlin | L. Chioncel
Source: ArXiv.org (preprint, 2025-11-11)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Suppression of magnetism in Co$_3$Sn$_2$S$_2$ under external pressure The ability to control the magnetic state provides a powerful means to tune the underlying band topology, enabling transitions between distinct electronic phases and the emergence of novel quantum phenomena. In this work, we address the evolution of ferromagnetic state upon applying external pressures up to 10.8~GPa using a combined experimental and theoretical study. The standard \emph{ab initio} Density Functional Theory computation including ionic relaxations grossly overestimates the unit cell magnetization as a function of pressure. In our theoretical analysis we identify two possible mechanisms to remedy this shortcoming. Matching the experimental observations is achieved by a symmetry-preserving adjustment of the sulfur atoms position within the unit cell. Alternatively, we explore various combinations of the exchange and correlation parts of the effective potential which reproduce the experimental magnetization, the structural parameters and the measured optical conductivity spectra. Thus, the pressure-dependent behavior of magnetization demands a careful theoretical treatment and analysis of theoretical and experimental data. Ferromagnetism ; Magnetism ; Magnetization ; Position (finance) ; Density functional theory ; Ground state ; Quantum Heusler alloys: electronic and magnetic properties ; Chemical and Physical Properties of Materials ; Metallurgical and Alloy Processes
Authors: Gunnar Schwarz | Chiara Fabbretti
Source: Journal of Chemical Education (article, 2025-08-20)
Field: Chemistry — Physical and Theoretical Chemistry

Student-Developed Analytical Approach for Element Determination in Dietary Supplements We present a new laboratory experiment in which students use a nitrogen microwave inductively coupled atmospheric-pressure plasma optical emission spectrometer (MICAP-OES) to determine several elements in dietary supplements. Unlike most other quantitative analytical lab experiments, this experiment required students to develop and carry out their own approaches to a given analytical task based on a previous lecture course on quantitative element analysis. Experimental details were not provided to the students. Appropriate procedures included dissolving the samples, as well as acid digestions. Students were able to contrive and perform the analysis within the given time frame of 4 h. We also show various ways in which the experiment can be adapted to provide different content emphases on sample preparation, calibration, use of internal standards, and spectral interference. An evaluation indicated that this experiment was well received by students but students also asked for a more detailed handout. Element (criminal law) ; Chemistry ; Analytical Chemistry (journal) ; Computer science ; Environmental chemistry ; Mathematics education ; Mathematics Various Chemistry Research Topics ; Heavy Metals in Plants ; Scientific Measurement and Uncertainty Evaluation
Authors: Jesús F. Arteaga | J.E. Martín‐Alfonso
Source: International Journal of Exact Sciences. (article, 2025-01-21)
Field: Chemistry — Physical and Theoretical Chemistry

INCORPORATION OF NON-ATTENDANCE EVALUATION PROCEDURES IN THE CHEMISTRY DEGREE PROGRAM The present study defines the design and implementation of different non face-to--face evaluation methods to be used as alternatives to the classical face-to-face evaluation procedures, within the context of the situation generated by the evolution of the teaching and evaluation model in the university environment originated from the COVID-19 coronavirus pandemic in recent years.All this in the academic environment of subjects belonging to the Degree in Chemistry, taught at the University of Huelva (Spain).Likewise, the study of the impact caused by this adaptation of the evaluation model on the different dimensions of the evaluation process within the teaching--learning system is detailed: methodological, normative and technological. Degree (music) ; Attendance ; Chemistry ; Computer science ; Mathematics ; Physics ; Political science Various Chemistry Research Topics ; Chemical Safety and Risk Management ; Innovative Teaching Methods
Authors: Jesús F. Arteaga | J.E. Martín‐Alfonso
Source: International Journal of Exact Sciences. (article, 2025-01-21)
Field: Chemistry — Physical and Theoretical Chemistry

INCORPORATION OF NON-ATTENDANCE EVALUATION PROCEDURES IN THE CHEMISTRY DEGREE PROGRAM Degree (music) ; Attendance ; Chemistry ; Computer science ; Political science ; Physics Various Chemistry Research Topics ; Chemical Safety and Risk Management ; Innovative Teaching Methods
Authors: Karytha Merie Silva Corrêa | Cláubia Pereira | Carlos E. Velasquez
Source: Brazilian Journal of Physics (article, 2025-08-23)
Field: Materials Science — Materials Chemistry

Performance Evaluation of Fission Transmutation Layers in ARC Reactor-Based Fusion-Fission Systems Nuclear transmutation ; Physics ; Fission ; Nuclear engineering ; Fusion ; Nuclear physics ; Long-lived fission product ; Fission products ; Nuclear fission ; Arc (geometry) ; Fission product yield ; Neutron Fusion materials and technologies ; Nuclear reactor physics and engineering ; Nuclear Materials and Properties
Authors: Ngoc Hoai An Nguyen | Văn Cường Lê | Minh Khương Nguyễn | Quốc Đạt Trần | Hoàng Trân Lê | Ba Cuong Nguyen
Source: Tập san Khoa học và kỹ thuật trường Đại học Bình Dương (article, 2025-09-30)
Field: Materials Science — Materials Chemistry

Nghiên cứu tin cậy va đập của ống thành mỏng vuông chèn lõi ABS Bài báo này nghiên cứu tính tin cậy va đập của cấu trúc ống nhôm thành mỏng được chèn lõi nhựa ABS đa ô. Kết quả phân tích cho thấy rằng khi số lượng ô trong lõi ABS tăng, khả năng chịu lực và hiệu quả hấp thụ năng lượng của cấu trúc cũng được cải thiện đáng kể. Ngoài ra, tất cả các cấu trúc được khảo sát đều thể hiện chế độ biến dạng lũy tiến, trong đó các nếp gấp hình thành tuần tự trong quá trình va chạm. Đáng chú ý, hiện tượng biến dạng cong—một dạng biến dạng không mong muốn đối với các cấu trúc hấp thụ năng lượng—không xuất hiện trong các mẫu nghiên cứu. Tin ; Southeast asia ; Metallography ; South asia Structural mechanics and materials ; Geodetic Measurements and Engineering Structures ; Research studies in Vietnam
Authors: Charlene M Moster
Source: International Journal for Research in Applied Science and Engineering Technology (article, 2025-12-15)
Field: Chemistry — Physical and Theoretical Chemistry

The Effectiveness of YouTube Channel-Based Learning in Improving Engineering Students Understanding of Stoichiometry in General Chemistry at Batangas State University State (computer science) ; Stoichiometry ; General chemistry Various Chemistry Research Topics ; STEM Education ; Educational Technology and E-Learning
Authors: Е. В. Бутырская | Алина Андреевна Пащенко
Source: Сорбционные и хроматографические процессы (article, 2025-07-30)
Field: Chemistry — Spectroscopy

Интерпретация изотерм адсорбции СО2 на металлорганических каркасах Cu3(BTC)2, MOF-2 и MOF-74 Модель кластерной адсорбции применена к интерпретации изотерм адсорбции углекислого газа на металл-органических каркасах MOF-2, MOF-74 и Cu3(BTC)2. Согласно данной модели на сорбенте формируются мономеры, димеры, кластеры из n-молекул из мономерных молекул сорбтива. Физико-химическая обоснованность адсорбции в форме кластеров заключается в том, что формирование кластеров сорбата обеспечивает более высокую энергию адсорбции по сравнению с фиксацией отдельных молекул вследствие снижения энергии системы за счет вклада в энергию адсорбции сорбат-сорбатных связей. Уравнение изотермы кластерной адсорбции получено аналитически в предыдущих работах, его параметрами являются коэффициенты равновесия реакций образования мономеров и кластеров сорбата, емкость монослоя и структурные характеристики кластеров сорбата, последнее позволяет оценить структуру сорбата. Для однослойной кластерной адсорбции разработан графический способ определения параметров и введен критерий, позволяющий на основе экспериментальных сорбционных данных выявить является ли монослойная адсорбция кластерной или адсорбцией индивидуальных молекул (Ленгмюр). Показано, что для системы Cu3(BTC)2 - СО2 площадь поверхности сорбента достаточна для однослойного покрытия и адсорбция является однослойной. Для анализа характера адсорбции этой системы использован критерий кластеризации, подтвердивший формирование на сорбенте кластеров сорбата. Показано, что при адсорбции на Cu3(BTC)2 кластеры сорбата состоят из 3-4 молекул. Для системы Cu3(BTC)2 - СО2 параметры уравнения изотермы определены графически и методом наименьших квадратов. Параметры изотермы адсорбции СО2 на МОF-2 и MOF-74 найдены методом наименьших квадратов. Показано, что в этом случае адсорбция является двухслойной. На МОF-2 формируются кластеры ~ из 2-3 молекул углекислого газа, из которых ~ 2 молекул лежат в 1 слое и ~ 1 молекула во втором. На поверхности MOF-74 в основном находятся кластеры из 2 молекул с 1-2 молекулами в первом слое. Identification (biology) ; Process (computing) ; Product (mathematics) Adsorption, diffusion, and thermodynamic properties of materials ; Catalytic Processes in Materials Science ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Darwin F. Reyes | Nancy Joy Mangansat | Jocelyn Cruz
Source: The QUEST Journal of Multidisciplinary Research and Development (article, 2025-12-30)
Field: Chemistry — Physical and Theoretical Chemistry

Hands-On from a Distance: The Perceptions of MAT General Science and Technology Graduate Students Towards Lab-at-Home Experiences This study aims to address the critical challenge of delivering practical laboratory skills during remote instruction. The purpose was to determine the perceptions of Master of Arts in Teaching (MAT) General Science and Technology graduate students regarding the pedagogical value, challenges, and effectiveness of mandatory lab-at-home experiences. A descriptive survey design was employed, utilizing a 5-point Likert scale and an open-ended question, with 20 graduate students participating. Results indicated a positive perception, particularly regarding instructional quality, with the clarity of design receiving a mean score of 4.85 out of 5. This result affirms the success of the experience in conceptual learning. Qualitative findings highlighted key benefits, including the promotion of student resourcefulness, time efficiency, and flexibility. Conversely, critical limitations were identified, such as a lack of precision due to non-calibrated equipment, concerns over safety supervision, and the absence of collaborative peer interaction. The major conclusion is that the lab-at-home experience is an excellent complementary pedagogical strategy, efficient for conceptual development and promoting creativity. Still, it must be integrated into a hybrid model to ensure proper training in safety, standardization, and quantitative accuracy. Likert scale ; CLARITY ; Perception ; Promotion (chess) ; Graduate students ; Qualitative research ; Scale (ratio) ; The arts Various Chemistry Research Topics ; Chemical Safety and Risk Management ; Science Education and Pedagogy
Authors: Benjamin N. Kwasi | Emmanuel E. Achor
Source: Journal of Research in Instructional (article, 2025-04-23)
Field: Chemistry — Physical and Theoretical Chemistry

Interventions into students’ academic performance at HOTS levels in redox reactions using problem-based learning and peer-tutoring strategies The impact of problem-based learning and peer-tutoring strategies on the higher-order thinking performance of grade ten students in redox reactions in Kogi State, Nigeria, was explored using a quasi-experimental design of pretest-posttest unequal group setting. The population comprised 795 grade 10 students from 33 co-educational schools, out of which 146 students (males = 69, females = 77) emerged as the sample. Data were collected using the Higher Order chemistry Performance Test (HOCPT) with a reliability coefficient of 0.83. Mean, SD, bar charts, and ANCOVA were deployed for analysis. Both problem-based learning and peer-tutoring strategies considerably enhanced students' academic performance at higher-order thinking levels in redox reactions. Gender was not a determining factor in the effectiveness of these strategies, and a considerable interaction effect was not observed between strategies and gender. These findings suggest that problem-based learning and peer tutoring are effective in improving students' HOTS performance in chemistry, regardless of gender. Organization of training workshops to help chemistry teachers with the skills needed to implement activity-based instructional strategies effectively was recommended. Psychological intervention ; Psychology ; Peer tutor ; Mathematics education ; Redox ; Problem-based learning ; Chemistry Various Chemistry Research Topics ; Problem and Project Based Learning
Authors: Daisuke Morikawa | Tianyu Liu | Kenji Tsuda
Source:  (article, 2025-01-01)
Field: Materials Science — Materials Chemistry

Crystal Structure and Charge Density Analysis at Twin Boundary using Multiple Convergent-beam Electron Diffraction Patterns <p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d18702e74">4D-STEM is a promising technique for analyzing nanometer-scale local structures. Depending on the convergence angle, different types of information can be extracted from the 4D dataset. For example, with a larger convergence angle, on the order of tens of milliradians (mrad), atomic-scale imaging techniques like differential phase contrast STEM (DPC-STEM) or ptychography can be applied. Conversely, with smaller convergence angles, such as on the order of microradians (μrad) — which implies that the incident beam is nearly parallel — 4D-STEM can be used for phase or orientation mapping. These applications have expanded significantly over the past decade. Another range of convergence angles, around several mrad, remains under exploration, though it is well known for its application in convergent-beam electron diffraction (CBED). <p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" dir="auto" id="d18702e76">Convergent-beam electron diffraction (CBED) patterns reveal intensity distributions within each disk, which are particularly sensitive to changes in charge density distribution, especially in the bonding electron distribution. To date, several groups have developed analytical methods and software for CBED pattern analysis based on dynamical scattering theory. These methods have successfully analyzed d-orbital holes in copper [ <a class="xref-link" href="#r1">1</a>], the bonding characteristics in aluminum [ <a class="xref-link" href="#r2">2</a>], and covalent bonding in silicon [ <a class="xref-link" href="#r3">3</a>]. These techniques enable precise determination of electron distributions within bulk materials. <p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" dir="auto" id="d18702e87">One of the most promising applications of CBED analysis is the study of interfaces, such as crystallographic domain boundaries, polar domain boundaries, and semiconductor interfaces, as the CBED method is a powerful tool for the simultaneous analysis of crystal structure and charge density at the nanometer scale. Here, we demonstrate the analysis of a superstructure with crystallographic twin boundaries in CaTiO₃, where the twin boundaries are expected to exhibit polar characteristics Electron diffraction ; Diffraction ; Electron ; Materials science ; Charge (physics) ; Crystal (programming language) ; Crystal structure ; Beam (structure) ; Boundary (topology) ; Molecular physics ; Physics ; Crystallography ; Optics ; Computer science ; Chemistry ; Mathematics ; Nuclear physics ; Quantum mechanics ; Mathematical analysis X-ray Diffraction in Crystallography ; Electron and X-Ray Spectroscopy Techniques
Authors: Maryono Maryono | Islawati Islawati | Hardin Hardin | Sakinah Zubair
Source: East Asian Journal of Multidisciplinary Research (article, 2025-05-25)
Field: Chemistry — Physical and Theoretical Chemistry

The Influence of Inquiry-Based Two Stay Two Stray Strategy on Understanding the Concept of Electrolyte and Nonelectrolyte Solutions This study aims to examine the effect of inquiry-based Two Stay Two Stray strategy on understanding the concept of electrolyte and nonelectrolyte solutions. The method used is a quasi-experiment with a nonequivalent control group design. The sample consisted of 52 grade X MIPA students, divided into experimental and control classes. The experimental class used the inquiry-based TSTS strategy, while the control class used the conventional method. The instrument in the form of a concept understanding test was given before and after treatment. Data analysis was carried out using an independent t-test. The results showed a significant difference between the two groups. The inquiry-based TSTS strategy is effective in improving understanding of chemical concepts and is worthy of being applied as an innovative alternative in science learning. Electrolyte ; Psychology ; Chemistry ; Physical chemistry ; Electrode Various Chemistry Research Topics ; Machine Learning in Materials Science
Authors: AEM (Azerbaijan Science Center)
Source:  (article, 2025-05-10)
Field: Chemistry — Physical and Theoretical Chemistry

SCIENTIFIC RESEARCHES XXV INTERNATIONAL SCIENTIFIC CONFERENCE zndrkin inkiafna gtirib xardrd.Bu da tbii olaraq Lnkran dbi mhitin ox msbt tsir gstrirdi.Qeyd etmk lazmd ki, mhitin pedaqoq airlrinin xalqn savadsz, elmsiz grmsi onlarn n arl v n yaral yeri idi.Buna gr d yaradclqlarnda bunu daha qabarq formada ks etdirmyi sanki bir hdlik kimi qarlarna qoyduqlarn mahid etmk olur.Aparlan aradrma nticsind elm, savada veriln dyri "Fvcl- Computer science ; Engineering ethics ; Political science ; Engineering History and advancements in chemistry ; Quality of Life Measurement ; Flooding and Environmental Impact
Authors: Ahmed Hala
Source: Preprints.org (preprint, 2025-11-28)
Field: Materials Science — Materials Chemistry

Controlled Low-Z Number Material Dust Injection as the Dominant Heat-Flux Mitigation Actuator for ITER and Future Fusion Reactors A full-factorial 34 (81-run) design-of-experiment using a high-fidelity SOLPS-ITER surrogate model demonstrates that deliberate injection of 1–5 μm lithium or beryllium dust from the mid-plane scrape-off layer reduces ITER divertor peak heat flux by 78–94%, raises divertor radiation fraction above 85%, and suppresses ELM energy release by &amp;gt; 90% while maintaining core contamination well below 10−5 — performance unattainable by any gaseous seeding scenario. Model validation using full SOLPS-ITER confirms predictive stability within the optimal region. Controlled low-Z dust injection thus emerges as a programmable power exhaust actuator with unprecedented performance, warranting pilot-scale experimental investigation in ITER and DEMO-class reactors. Divertor ; Beryllium ; Fusion power ; Actuator ; Blanket ; Heat flux ; Helium ; Flux (metallurgy) ; Fusion ; Core (optical fiber) Fusion materials and technologies ; Magnetic confinement fusion research ; Superconducting Materials and Applications