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Apparatus Named After Our Academic Ancestors—VI
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| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 4) |
| Halaman | : | 259-261 |
| Abstrak | : | When the fifth of my articles bearing the same title as this one arrived in April 2021, I looked at all of them and discovered that I had discussed apparatus named after 24 of our earlier colleagues! Who had I left out? After a bit of thought, I thought of Lloyd’s mirror, Faraday’s bag, Hope’s apparatus, Volta’s cannon and pistol, and Dewar’s “dewar.” Of course, there was Snell’s “law,” but that was stretching it too far! Since 2002, I have been writing page fillers for the American Journal of Physics, each consisting of a picture and a 100-word caption. About 800 of these have appeared to date. Therefore, I turned to them and found more than three score more names of physicists and their apparatus. Here are five of them. |
DUPUIS DAN WARISAN TEOLOGI PLURALITAS AGAMA
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Rohani |
| Volume / Edisi | : | 72 (No. 01) |
| Halaman | : | 41-45 |
| Abstrak | : | - |
Repurposing Concept Inventories to Help Students Find Gaps in Explanations
| Pengarang | : | Tiffany-Rose Sikorski |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 4) |
| Halaman | : | 255-258 |
| Abstrak | : | Much of physics class time is spent helping students learn the explanations generally accepted by the scientific community. Concept inventories have become a key tool in this effort. Assessments like the Force Concept Inventory1 and Brief Electricity and Magnetism Assessment2 are valuable resources for instructors to gauge students’ understanding of core concepts in physics. These assessments typically present students with a scenario, a question about that scenario, and a series of possible answers. Following instruction, students should be able to select the best option, one that demonstrates their grasp of core concepts and principles. But what if the learning didn’t stop there? Even the best explanations contain gaps or limitations. It is important for students to appreciate that physics progresses not through enduring satisfaction with our current understandings, but through the search for gaps or inconsistencies requiring further explanation. Many important discoveries in physics emerge from a willingness to question even our most closely held theories about the natural world. Using an illustrative example, we present the possibility of repurposing concept questions to teach physics students to go beyond correct answers and search for gaps and limitations of those answers. Our illustrative example begins with what students refer to as the “penguin problem” after the main characters—emperor penguins. The problem was designed by the Diagnostic Question Clusters project3 and appeared in a paper by C. Wilson and colleagues.4 The team designed the penguin problem, along with a handful of others, to assess students’ tendency to trace matter and energy in biological processes. Figure 1 shows the original wording of the problem. |
PERSAUDARAAN DENGAN TEMAN BERBEDA KEYAKINAN
| Pengarang | : | SUPARNO PAUL |
| Nama Majalah/Jurnal | : | Rohani |
| Volume / Edisi | : | 72 (No. 01) |
| Halaman | : | 35-40 |
| Abstrak | : | - |
What Do Networks and Elliptic Curves Have in Common?
| Pengarang | : | Jasbir S. Chahal |
| Nama Majalah/Jurnal | : | The American Mathematical Monthly |
| Volume / Edisi | : | 130 (No. 2) |
| Halaman | : | 158-175 |
| Abstrak | : | Graph theory used in networking and the arithmetic of elliptic curves have more in common than meets the eye. We present how their zeta functions fuse them seamlessly. |
What Is Cosmic Inflation?
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 4) |
| Halaman | : | 250-254 |
| Abstrak | : | In 1927, Belgian priest and cosmologist G. Lemaître published an article that proposed that our universe was expanding.1 Lemaître’s idea was originally simply an explanation for the motion of what we now call distant galaxies; however, he broadened his ideas and presented these more ambitious thoughts to the British Royal Astronomical Society in 1931. At that meeting, he first publicly discussed his idea of a “primeval atom,” which was his term for the visible universe compressed to tiny size. He published this idea in 1931?in the journal Nature.2 We now call his idea the Big Bang, a term coined by astronomer Fred Hoyle on a BBC radio show in 1949.3 |
Minimax Theorem Revisited
| Pengarang | : | Michail Schlesinger |
| Nama Majalah/Jurnal | : | The American Mathematical Monthly |
| Volume / Edisi | : | 130 (No. 2) |
| Halaman | : | 145-157 |
| Abstrak | : | The article presents a new proof of the minimax theorem. Its novelty is that it uses only elementary concepts within the scope of obligatory mathematical education of engineers. The minimax theorem results in numerous applications and many of them are far from being obvious. Hence the use of such applications has to be based not only on belief in the minimax theorem, but on a transparent understanding of it without need of more complicated concepts. The audience for this article is mathematicians who lecture on convex analysis to nonmathematicians. |
GIDEON, SI PENAKUT YANG MENJADI PAHLAWAN
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Rohani |
| Volume / Edisi | : | 72 (No. 01) |
| Halaman | : | 31-34 |
| Abstrak | : | - |
Random Walks, Directed Cycles, and Markov Chains
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The American Mathematical Monthly |
| Volume / Edisi | : | 130 (No. 2) |
| Halaman | : | 127-144 |
| Abstrak | : | A Markov chain is a random process which iteratively travels around in its state space with each transition only depending on the current position and not on the past. When the state space is discrete, we can think of a Markov chain as a special type of random walk on a directed graph. Although a Markov chain normally never settles down but keeps moving around, it does usually have a well-defined limiting behavior in a statistical sense. A given finite directed graph can potentially support many different random walks or Markov chains and each one could have one or more invariant (stationary) distributions. In this paper we explore the question of characterizing the set of all possible invariant distributions. The answer turns out to be quite simple and very natural and involves the cycles on the graph. |
SECUPLIK PERJALANAN SPIRITUAL MUSLIMAH MANTAN EKSTREMIS
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Rohani |
| Volume / Edisi | : | 72 (No. 01) |
| Halaman | : | 26-30 |
| Abstrak | : | - |