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10th National physics Seminar, SNF 2021

作者： Sriwati Delina, M. Supriyati, Y. Physics Education Master Program Universitas Negeri Jakarta Jl. Rawamangun Muka Jakarta13220 Indonesia

This study aims to obtain an overview of the blended learning program for physics subjects in mechanical wave material during the covid-19 pandemic, and to find out the supporting factors and obstacles so that they can be projected into solutions that are adaptive to the needs, availability and skills of students. The research method used is qualitative with an evaluative approach to the CSE-UCLA model. The subjects of this study were students of class XI IPA-1 and XI IPA-2, totaling 64 people at SMA Negeri 1 Timpah, Timpah Village, Central Kalimantan, Indonesia. Data were collected through questionnaires, interviews, observation and documentation. The data analysis procedure used Milles & Hubberman model analysis, including data reduction, data presentation, and drawing conclusions. Furthermore, the data and research findings were triangulated to check the validity of the data. The results of the program evaluation research from system assessment components, program planning, program implementation, improvement programs, and certification programs overall show that the physics blended learning program at SMA Negeri 1 Timpah supports the government's policy in responding to the COVID-19 outbreak to learn from home, which is relevant to the supporting factors and obstacles. © 2021 Institute of physics Publishing. All rights reserved.

关键词： Students

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Evaluation of Blended Learning program physics of Mechanical Wave Materials Using CSE-UCLA Model

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Journal of physics: Conference Series 2021年第1期2019卷

作者： Sriwati M Delina Y Supriyati Physics Education Master Program Universitas Negeri Jakarta Jl. Rawamangun Muka Jakarta 13220 Indonesia

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Professional and academic follow up of 100+ graduates of the UAEMex-ININ masters and doctorate program in medical physics in Mexico

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AIP Conference Proceedings 2021年第1期2348卷

作者： Eleni Mitsoura Keila Isaac-Olive Liliana Aranda-Lara Miguel Angel Camacho-Lopez Eugenio Torres-Garcia Alberto Ernesto Hardy-Perez Medical Physics Graduate Program School of Medicine Universidad Autónoma del Estado de México (UAEMex) Paseo Tollocan s/n esq. Jesús Carranza Toluca Estado de México C.P 50120 México

Introduction: At the beginning of the 90´s the low number of medical physicists in Mexico was a concern. In 1994, the Instituto Nacional de Investigaciones Nucleares (ININ), sponsored by the International Atomic Energy Agency (IAEA), promoted the creation of a teaching and training program in Medical physics. In 1996, the Universidad Autónoma del Estado de México (UAEMex) and the ININ started the first formal Graduate program in Science (Master's and Doctorate degree) specialized in Medical physics in Mexico. Since 2009 the academic coordination of the program is under UAEMex supervision, but still ININ is its principal collaborator. The objective of this work is to present the professional and academic follow up of 100+ graduates of the UAEMex-ININ program after 24 years of experience. Methods: From the current student files, alumni records and the alumni tracking program, a retrospective analysis was carried out based on: a. Professional and social matters (geographical origin of the students, academic background, ratio of graduated students currently working as medical physicists and related areas, etc.); b. Academic impact (scientific publications and citations produced by the ***. and ***. programs, number of thesis by the study areas of the Medical physics field, etc.). Results and discussion: The overall terminal efficiency of the program is 69.2%. Although the largest number of students comes from the State of Mexico and Mexico City, students have also been received from 12 other states of Mexico. The incoming students mostly have a Bachelor or Engineering degree majoring in physics. About 81.4% of the graduated work in areas related to medical physics, where 50% of that proportion are clinical medical physicists who are in 17 different states of the country. The areas of Nuclear Medicine and Radiation Therapy are the preferred ones for thesis, and the publications indicate the scientific impact of the program. Conclusions: The indicators presented in this

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Continual Advance in Earth physics Research Group at physics Study program, Unesa: What's new and the next step

Continual Advance in Earth Physics Research Group at Physics...

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2023 National physics Seminar, SNF 2023

作者： Prastowo, T. Madlazim Realita, A. Fahmi, M.N. Physics Study Program Faculity of Mathematics and Natural Sciences Universitas Negeri Surabaya Surabaya Indonesia

Earth physics Research Group (EPRG) is one of three groups of research running at physics Study program, the State University of Surabaya, Indonesia, where a number of research projects with corresponding topics have been conducted (and some are in progress) by the group members and associated students having final projects in the field of earth physics since 2018. Whereas the research roadmap of the group has been presented in association with definitive research projects for 25 years long starting from 2011, the specific goal of this paper is to shortly summarise all academic achievement in terms of research performance made by the group members during the last five years. The majority of the recent works was mainly based on computational work, where some were completed in collaboration with researchers from other universities and a national agency and others were performed by the group members and selected students. The topics were spread across disciplines in earth physics that included tectonic earthquakes, tsunami generation and propagation of seismic and non-seismic origin, volcanic eruptions and an integrated disaster mitigation study. A small portion of the projects were performed using a chosen method of applied geophysics. These studies have ended up with publications in recent years, where the saline points of the key findings are here presented. Future studies focusing on vulnerability to earthquake hazards in the northern areas of Java and on volcanic and meteo-tsunamis are also discussed in the context of possible tsunamis induced by seismic sources or volcanic processes. © Published under licence by IOP Publishing Ltd.

关键词： Tsunamis

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Controlling orbital magnetism of band electron systems via bath engineering

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Physical Review B 2024年第14期110卷 L140405页

作者： Subrata Chakraborty So Takei Fachbereich Physik Department of Physics Physics Doctoral Program

Orbital magnetism arises due to the coherent cyclotron motion of band electrons. System-bath entanglement is expected to disrupt this coherent electronic motion and quench orbital magnetism. Here, we show that a suitably tailored bath can lead to an enhancement of the orbital diamagnetic susceptibility of a multiband electron system and can even convert an orbital paramagnetic response into a diamagnetic one as the system-bath coupling is increased. We also demonstrate how a van Hove singularity in the bath density of states can be exploited to generate a giant enhancement of the orbital magnetic susceptibility. Our work opens doors to the possibility of controlling the orbital magnetic response of band electron systems through bath engineering.

关键词： Magnetic susceptibility Magnetism Open quantum systems & decoherence Orbital order

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Categorization intermediate conception of the third year students' of physics education program in electromagnetism wave sub-concepts 1

Categorization intermediate conception of the third year stu...

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1st Mathematics and Science Education International Seminar, MASEIS 2019

作者： Wardana, R.W. Liliasari, L. Tjiang, P.C. Nahadi, N. Science Education Program Universitas Bengkulu Bengkulu Indonesia Science Education Program Universitas Pendidikan Indonesia Bandung Indonesia Department of Physics Faculty of Information Technology and Sciences Universitas Katolik Parahyangan Bandung Indonesia

Some results on the conceptual change, indicated a discriminate between alternative and scientific conceptions. This could be represented as a medium conceptions, called the intermediate conceptions. Researches on the electromagnetic wave sub-concept generally assessed based on modern physics conceptions, on the other hand it needs to be assessed based on the concept of electricity and magnetism. This research aims to identify and describe category of intermediate conception of third year physics education students in electromagnetic wave sub-concepts. This research used descriptive method. The subjects of this research were 73 third year students in a University of Teacher Training at Bandung. Data collection have been done by essay test and interview. The analyzed data shows that 77% of the students are on 'lateral intermediate conception'category and none of them were on 'naïve physics'. Other results showed that the students have difficulty on describing, explaining, interpreting qualitatively about electromagnetic wave sub-concepts. © Published under licence by IOP Publishing Ltd.

关键词： Students

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Localized interfacial phonon modes at the electronic axion domain wall

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Physical Review B 2024年第16期110卷 L161301页

作者： Abhinava Chatterjee Mourad Oudich Yun Jing Chao-Xing Liu Department of Physics The Graduate Program in Acoustics The CNRS Institut Jean Lamour F-54000 Nancy France

The most salient feature of electronic topological states of matter is the existence of exotic electronic modes localized at the surface or interface of a sample. In this work, in an electronic topological system, we demonstrate the existence of localized phonon modes at the domain wall between topologically trivial and nontrivial regions, in addition to the localized interfacial electronic states. In particular, we consider a theoretical model for the Dirac semimetal with a gap opened by external strains and study the phonon dynamics, which couples to electronic degrees of freedom via strong electron-phonon interaction. By treating the phonon modes as pseudogauge fields, we find that the axion type of terms for phonon dynamics can emerge in gapped Dirac semimetal model and lead to interfacial phonon modes localized at the domain wall between trivial and nontrivial regimes that possess the axion parameters 0 and π, respectively. We also discuss the physical properties and possible experimental probe of such interfacial phonon modes.

关键词： Acoustic phonons Electron-phonon coupling Topological materials Topological phases of matter

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Solar photovoltaic as a potential renewable energy in environmentally friendly project-based physics learning 1

Solar photovoltaic as a potential renewable energy in enviro...

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1st International Seminar on physics and Its Application, IsoPA 2024

作者： Jauhari, A. Puspita, F.D. Lestari, N.A. Deta, U.A. Sujito Physics Education Program Universitas Negeri Surabaya Surabaya Indonesia Physics Education Program Universitas Negeri Malang Malang Indonesia

This research aims to explore the implementation of Solar Photovoltaic (PV) as a potential renewable energy in environmentally friendly project-based physics learning to improve understanding of the principles of physics in solar photovoltaic and awareness of environmental issues and climate change. The project-based learning (PjBL) learning model is applied to provide a deep and meaningful learning experience because students are required to be actively involved in designing, developing, and evaluating Solar Photovoltaic projects. This research was conducted using the literature review method on several articles related to project-based physics learning and solar photovoltaic as renewable energy. From several articles obtained, identification, evaluation, and synthesis were carried out related to the research results and thoughts from previous researchers. The results show that project-based learning focusing on Solar Photovoltaic effectively improves students' understanding of physics concepts related to renewable energy and improves 21st-century skills, namely creativity, problem-solving, and critical thinking skills. In addition, students also showed increased awareness and responsibility for environmental issues. © 2024 Institute of physics Publishing. All rights reserved.

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Ultrafast spin dynamics in the proximate quantum spin liquid α−RuCl3

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Physical Review B 2024年第8期110卷 L081111页

作者： Haochen Zhang Subin Kim Young-June Kim Hae-Young Kee Luyi Yang State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Department of Physics Quantum Materials Program Toronto Ontario Canada M5G 1M1 Beijing 100084 China

α−RuCl3 is a Kitaev material suggested to be a proximate quantum spin liquid in a certain temperature and magnetic field range. Nonequilibrium measurements of transient dynamics have been proposed to detect fractionalized particles that emerge in the spin liquid and to possibly drive the system into novel photoinduced magnetic states that cannot be accessed by conventional equilibrium probes. Here we study ultrafast spin dynamics of photoinduced excitations in α−RuCl3 using pump-probe transient grating spectroscopy. In the real part of the complex transient reflection coefficient Δr/r, we observe evidence of long-range antiferromagnetic correlations near the Néel temperature. Most intriguingly, above the Néel temperature in the Kitaev paramagnetic phase, we reveal a photoexcitation component sensitive to the in-plane magnetic field in the imaginary part of Δr/r. This component exhibits two distinct lifetimes of about tens of picoseconds. This photoexcitation component may be connected to novel photoexcited states in the Kitaev quantum spin liquid, and its lifetimes likely reflect the dynamics of unconventional spin excitations in the Kitaev model.

关键词： Quantum spin liquid Spin dynamics Ultrafast magnetic effects Ultrafast phenomena Ultrafast pump-probe spectroscopy

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Activated Carbon from Nipa Palm Fronds(Nypa fruticans)with H_(3)PO_(4) and KOH Activators as Fe Adsorbers

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Journal of Renewable Materials 2024年第2期12卷 203-214页

作者： Ninis Hadi Haryanti Eka Suarso Tetti N.Manik Suryajaya Nurlita Sari Darminto Physics Study Program FMIPAUniversitas Lambung MangkuratBanjarbaru70714Indonesia Department of Physics Institut Teknologi Sepuluh NopemberSurabaya60111Indonesia

Nipa palm is one of the non-wood plants rich in lignocellulosic *** this study,palm fronds were converted into activated carbon,and their physical,chemical,and morphological properties were *** resulting activated carbon was then applied as an adsorbent of Fe metal in peat *** carbonization process was carried out for 60 min,followed by sintering at 400℃ for 5 h with a particle size of 200 *** and H_(3)PO_(4) were used in the chemical activation process for 24 ***-activated carbon contained 6.13%of moisture,4.55%of ash,17.02%of volatile matter,and 78.84%of fixed carbon,while its Fe reduction efficiency was 28.09%.The H_(3)PO_(4)-activated carbon contained 4.67%of moisture,2.84%of ash,16.41%of volatile matter,and 80.57%of bonded carbon,and the Fe reduction efficiency was 52.25%.KOH-activated carbon and H_(3)PO_(4)-activated carbon contained fixed carbon of 78.84%and 80.57%,respectively,while their average rates of efficiency of Fe reduction were 22.82%and 39.23%,***,the characteristics of activated nipa carbon met the Indonesian standards(SNI No.06-3730-1995).However,H_(3)PO_(4)-activated carbon was found to be better at adsorbing Fe metal from peat water.

关键词： Adsorption lignocellulosic reduction of Fe sintering volatile content

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