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A simplified treatment of neutron slowing by elastic collisions
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| Pengarang | : | - |
| Nama Majalah/Jurnal | : | American Journal of Physics |
| Volume / Edisi | : | 88 (No. 10) |
| Halaman | : | 871-873 |
| Abstrak | : | An approximate treatment of neutron slowing by elastic collisions with nuclei of a moderating material in a nuclear reactor is developed on the basis of a compact treatment of elastic collisions previously published in this journal [B. C. Reed, Am. J. Phys. 86(8), 622 (2018)]. The analysis is straightforward enough to be presented to lower-level students and gives results in good accord with more sophisticated treatments. |
ARSIP SAJIAN FAKTA YANG FAKTUAL
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Berita Arsip Nasional RI |
| Volume / Edisi | : | -/37, DESEMBER (No. 37) |
| Halaman | : | 67-77 |
| Abstrak | : | - |
Adventures with historical physics apparatus
| Pengarang | : | Thomas B. Greenslade, Jr. |
| Nama Majalah/Jurnal | : | American Journal of Physics |
| Volume / Edisi | : | 88 (No. 10) |
| Halaman | : | 864-870 |
| Abstrak | : | The past is always with us, not only the physics history that we revere and try to put into our classroom presentations. Two hundred years of teaching natural philosophy (physics) have left us a significant amount of physics history in the form of early apparatus. In this article, I will tell stories about how I have become involved in the study of early physics apparatus. Because of my website on Historical Physics Teaching Apparatus, I have fielded a series of queries since the year 2000: I have inherited this apparatus, what is it and how much is it worth? My students turned up this interesting piece of apparatus and think that they might use it in an experiment—what is it and tell me how it can be put into the curriculum? |
Navigating Opportunities and Challenges of Artificial Intelligence: ChatGPT and Generative Models in Science Teacher Education
| Pengarang | : | Anna Zhigun |
| Nama Majalah/Jurnal | : | Journal of Science Teacher Education |
| Volume / Edisi | : | 34 (No. 7-8) |
| Halaman | : | 793-798 |
| Abstrak | : | - |
URGENSI ARSIP DALAM KEHIDUPAN BERBANGSA DAN BERNEGARA SERTA UPAYA MENUMBUHKAN MASYARAKAT SADAR ARSIP MELALUI OPTIMALISASI SARANA YURIDIS
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Berita Arsip Nasional RI |
| Volume / Edisi | : | -/37, DESEMBER (No. 37) |
| Halaman | : | 53-66 |
| Abstrak | : | - |
Constructivist and transmissive mentoring : effects on teacher self-efficacy, emotional management, and the role of novices` initial beliefs
| Pengarang | : | Burger, Julian |
| Nama Majalah/Jurnal | : | Journal of Teacher Education |
| Volume / Edisi | : | 75 (No. 1) |
| Halaman | : | 107 - 121 |
| Abstrak | : | Mentoring is acknowledged as an essential prerequisite for successful teacher induction, but its effectiveness may vary depending on the mentor’s quality of support and the mentee’s initial professional beliefs. Focusing on novice teachers’ self-efficacy and emotional management, this longitudinal study investigates how constructivist- and transmission-oriented mentoring approaches support beginning teachers’ professional development, and how these approaches interact with the novices’ initial beliefs about teaching and learning. The data stem from a sample of 138 beginning teachers who participated in an online survey during their second and third trimesters of practical training in Germany. Moderated regression analyses indicate positive effects of constructivist mentoring on teacher self-efficacy 6 months later, and an enhancing moderation effect of mentees’ mismatching, transmissive beliefs. Results neither support distinct effects of constructivist mentoring on novices’ emotional management nor associations between transmissive mentoring and the outcomes. Implications for mentoring research and practice are discussed. |
A perfectly inelastic collision: Bulk prey engulfment by baleen whales and dynamical implications for the world's largest cetaceans
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | American Journal of Physics |
| Volume / Edisi | : | 88 (No. 10) |
| Halaman | : | 851-863 |
| Abstrak | : | The largest animals are the rorquals, a group of whales which rapidly engulf large aggregations of small-bodied animals along with the water in which they are embedded, with the latter subsequently expulsed via filtration through baleen. Represented by species like the blue, fin, and humpback whales, rorquals can exist in a wide range of body lengths (8–30 m) and masses (4000–190,000 kg). When feeding on krill, kinematic data collected by whale-borne biologging sensors suggest that they first oscillate their flukes several times to accelerate towards their prey, followed by a coasting period with mouth agape as the prey-water mixture is engulfed in a process approximating a perfectly inelastic collision. These kinematic data, used along with momentum conservation and time-averages of a whale's equation of motion, show the largest rorquals as generating significant body forces (10–40 kN) in order to set into forward motion enough engulfed water to at least double overall mass. Interestingly, a scaling analysis of these equations suggests significant reductions in the amount of body force generated per kilogram of body mass at the larger sizes. In other words, and in concert with the allometric growth of the buccal cavity, gigantism would involve smaller fractions of muscle mass to engulf greater volumes of water and prey, thereby imparting a greater efficiency to this unique feeding strategy. |
"I Will Fight. I Will Advocate. I Will Tell Others": The Impacts of the Deliberate Attention to Caring about Effective Elementary Science Instruction in a Methods Course
| Pengarang | : | Carney, Michele,Wenner, Julianne A |
| Nama Majalah/Jurnal | : | Journal of Science Teacher Education |
| Volume / Edisi | : | 34 (No. 7-8) |
| Halaman | : | 770-791 |
| Abstrak | : | Given the myriad mandates and policies related to math and language arts education, U.S. public elementary teachers must care about teach ing science for it to actually happen. Consequently, this study sought to explore the impacts of assignments in a science methods course supporting teacher candidates (TCs) in caring about effective elemen tary science instruction (EESI). Different from other teacher disposi tions, this study defines caring about elementary EESI as having the ability to articulate the value it provides to students and society and internalize the importance such that one is driven to teach science at a high level, even if they must overcome obstacles. Data were col lected via two care-focused assignments, a pre/post-survey, and an interview. Findings indicate that a) for many, this course was the first time they realized the value of EESI; b) the care-focused assignments in the course allowed TCs to flesh out arguments as to why elementary science is important; and c) TCs were more assertive and specific about actions they will take in the future to support and/or advocate for EESI. Explicitly attending to the notion of caring about EESI in a science methods course is necessary if instructors are to support TCs in teach ing EESI. |
The quantum character of buckling instabilities in thin rods
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | American Journal of Physics |
| Volume / Edisi | : | 88 (No. 10) |
| Halaman | : | 845-850 |
| Abstrak | : | Here the buckling of inextensible rods due to axial body forces is mapped to 1D, nonrelativistic, time-independent quantum mechanics. Focusing on the pedagogical case of rods confined to 2D, three simple and physically realizable applications of the mapping are given in detail; the quantum counterparts of these are particle in a box, particle in a delta-function well, and particle in a triangular well. A fourth application examines the buckling counterpart of a quantum many-body problem (in the Hartree approximation). Through a fifth application, given in the form of an exercise, the reader can explore the surprising consequences of adding a second transverse dimension to the rod buckling problem and imposing periodic boundary conditions. |
KONTRIBUSI ARSIP DALAM PROSES PENGAMBILAN KEPUTUSAN
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Berita Arsip Nasional RI |
| Volume / Edisi | : | -/37, DESEMBER (No. 37) |
| Halaman | : | 41-52 |
| Abstrak | : | - |