Subjects -> EDUCATION (Total: 2550 journals)
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    - EDUCATION (2189 journals)
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    - SPECIAL EDUCATION AND REHABILITATION (40 journals)
    - TEACHING METHODS AND CURRICULUM (37 journals)

EDUCATION (2189 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 857 Journals sorted alphabetically
#Tear : Revista de Educação, Ciência e Tecnologia     Open Access   (Followers: 5)
(Pensamiento), (palabra) y obra     Open Access   (Followers: 2)
21. Yüzyılda Eğitim Ve Toplum Eğitim Bilimleri Ve Sosyal Araştırmalar Dergisi     Open Access  
21st Century Pedagogy     Open Access   (Followers: 7)
@tic. revista d'innovació educativa     Open Access  
Abant İzzet Baysal Üniversitesi Eğitim Fakültesi Dergisi     Open Access   (Followers: 2)
ABDIMAS ALTRUIS : Jurnal Pengabdian Kepada Masyarakat     Open Access  
Abdimas Toddopuli : Jurnal Pengabdian Pada Masyarakat     Open Access   (Followers: 12)
About Campus     Hybrid Journal   (Followers: 9)
Academic Medicine     Hybrid Journal   (Followers: 75)
Academic Psychiatry     Full-text available via subscription   (Followers: 33)
Academic Questions     Hybrid Journal   (Followers: 9)
Academy of Educational Leadership Journal     Full-text available via subscription   (Followers: 65)
Academy of Management Learning and Education     Full-text available via subscription   (Followers: 65)
Accounting & Finance     Hybrid Journal   (Followers: 59)
Accounting Education: An International Journal     Hybrid Journal   (Followers: 23)
Açıköğretim Uygulamaları ve Araştırmaları Dergisi     Open Access  
ACM Transactions on Computing Education (TOCE)     Hybrid Journal   (Followers: 13)
Acta Científica : Ciências Humanas     Open Access   (Followers: 2)
Acta Didactica Norge     Open Access   (Followers: 2)
Acta Educationis Generalis     Open Access  
Acta Paedagogica Vilnensia     Open Access   (Followers: 1)
Acta Scientiarum. Education     Open Access  
Action in Teacher Education     Hybrid Journal   (Followers: 79)
Action Learning: Research and Practice     Hybrid Journal   (Followers: 44)
Action Research     Hybrid Journal   (Followers: 51)
Active Learning in Higher Education     Hybrid Journal   (Followers: 371)
Actualidades Pedagógicas     Open Access  
Adelphi series     Hybrid Journal   (Followers: 14)
Adiyaman University Journal of Educational Sciences     Open Access   (Followers: 1)
Administração Educacional     Open Access  
Administration & Society     Hybrid Journal   (Followers: 15)
Administrative Science Quarterly     Full-text available via subscription   (Followers: 246)
Adult Education Quarterly     Hybrid Journal   (Followers: 248)
Advanced Education     Open Access   (Followers: 16)
Advances in Building Education     Open Access   (Followers: 7)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 36)
Advances in High Energy Physics     Open Access   (Followers: 25)
Advances in School Mental Health Promotion     Partially Free   (Followers: 12)
AERA Open     Open Access   (Followers: 11)
Africa Education Review     Hybrid Journal   (Followers: 30)
African Journal of Chemical Education     Open Access   (Followers: 5)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 10)
African Journal of Health Professions Education     Open Access   (Followers: 6)
African Journal of Research in Mathematics, Science and Technology Education     Hybrid Journal   (Followers: 11)
African Journal of Teacher Education     Open Access   (Followers: 1)
Agora     Full-text available via subscription   (Followers: 6)
AGORA Magazine     Open Access  
Ahi Evran Üniversitesi Kırşehir Eğitim Fakültesi Dergisi     Open Access  
Ahmad Dahlan Journal of English Studies     Open Access   (Followers: 3)
AIDS Education and Prevention     Full-text available via subscription   (Followers: 8)
Ainedidaktiikka     Open Access  
Akadémiai Értesítö     Full-text available via subscription  
Akademos     Open Access   (Followers: 1)
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 3)
AKSIOMATIK : Jurnal Penelitian Pendidikan dan Pembelajaran Matematika     Open Access   (Followers: 1)
Aksis : Jurnal Pendidikan Bahasa dan Sastra Indonesia     Open Access  
Al-Athfaal : Jurnal Ilmiah Pendidikan Anak Usia Dini     Open Access   (Followers: 3)
Al-Bahith Journal     Open Access   (Followers: 1)
Al-Fikrah     Open Access   (Followers: 4)
Al-Idarah : Jurnal Kependidikan Islam     Open Access  
Al-Jabar : Jurnal Pendidikan Matematika     Open Access   (Followers: 1)
Al-Mudarris : Journal of Education     Open Access   (Followers: 1)
Al-Tadris : Jurnal Pendidikan Bahasa Arab     Open Access  
Al-Tadzkiyyah : Jurnal Pendidikan Islam     Open Access  
Al-Tanzim : Jurnal Manajemen Pendidikan Islam     Open Access  
Al.Qadisiya journal for the Sciences of Physical Education     Open Access  
Alan Eğitimi Araştırmaları Dergisi     Open Access  
Alberta Journal of Educational Research     Full-text available via subscription   (Followers: 9)
Aldaba     Open Access   (Followers: 1)
Alexandria : Revista de Educação em Ciência e Tecnologia     Open Access  
Alotrop     Open Access  
Alsic : Apprentissage des Langues et Systèmes d'Information et de Communication     Open Access   (Followers: 17)
Alteridad     Open Access  
Amasya Universitesi Egitim Fakültesi Dergisi     Open Access  
Ambiente & Educação : Revista de Educação Ambiental     Open Access  
American Annals of the Deaf     Full-text available via subscription   (Followers: 19)
American Biology Teacher     Full-text available via subscription   (Followers: 14)
American Educational Research Journal     Hybrid Journal   (Followers: 236)
American Journal of Business Education     Open Access   (Followers: 16)
American Journal of Distance Education     Hybrid Journal   (Followers: 33)
American Journal of Education     Full-text available via subscription   (Followers: 281)
American Journal of Educational Research     Open Access   (Followers: 73)
American Journal of Health Education     Hybrid Journal   (Followers: 36)
American Journal of Physics     Full-text available via subscription   (Followers: 54)
American String Teacher     Full-text available via subscription   (Followers: 2)
Ana Dili Eğitimi Dergisi / Journal of Mother Tongue Education     Open Access  
Anadolu Journal Of Educational Sciences International     Open Access   (Followers: 1)
Anadolu University Journal of Education Faculty     Open Access  
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 4)
Anargya : Jurnal Ilmiah Pendidikan Matematika     Open Access   (Followers: 9)
Annales Universitatis Mariae Curie-Sklodowska, sectio N – Educatio Nova     Open Access  
Annali dell'Universita di Ferrara     Hybrid Journal  
Annals of Dyslexia     Hybrid Journal   (Followers: 11)
Annals of Modern Education     Full-text available via subscription   (Followers: 6)
Antistasis : An Open Educational Journal     Open Access   (Followers: 10)
Anuario Pilquen : Sección Divulgación Científica     Open Access  
Apertura. Revista de innovación educativa‏     Open Access   (Followers: 3)
Apex : New Zealand Journal of Gifted Children     Open Access   (Followers: 1)
Applied Environmental Education & Communication     Hybrid Journal   (Followers: 19)
Applied Measurement in Education     Hybrid Journal   (Followers: 11)
Aprender     Open Access  
AR-RIAYAH : Jurnal Pendidikan Dasar     Open Access  
Arabia     Open Access   (Followers: 1)
Arabiyatuna : Jurnal Bahasa Arab     Open Access  
Archivos de Ciencias de la Educación     Open Access   (Followers: 2)
Areté, Revista Digital del Doctorado en Educación de la Universidad Central de Venezuela     Open Access   (Followers: 1)
Arrancada     Open Access   (Followers: 1)
Ars Educandi     Open Access  
Art Design & Communication in Higher Education     Hybrid Journal   (Followers: 30)
Arte e Investigación     Open Access   (Followers: 1)
Arts and Humanities in Higher Education     Hybrid Journal   (Followers: 45)
Arts Education Policy Review     Hybrid Journal   (Followers: 7)
Artseduca : Revista electrónica de educación en las ARTES     Open Access   (Followers: 1)
ASEAN Journal of Education     Open Access   (Followers: 3)
ASHE Higher Education Reports     Hybrid Journal   (Followers: 21)
Asia Pacific Education Review     Hybrid Journal   (Followers: 12)
Asia Pacific Journal of Education     Hybrid Journal   (Followers: 24)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 14)
Asia-Pacific Journal of Teacher Education     Hybrid Journal   (Followers: 27)
Asian Journal of Distance Education     Open Access   (Followers: 4)
Asian Journal of Education and Social Studies     Open Access   (Followers: 2)
Asian Journal of English Language Teaching     Full-text available via subscription   (Followers: 17)
Asian Journal of Legal Education     Full-text available via subscription   (Followers: 4)
Asian-Pacific Journal of Second and Foreign Language Education     Open Access   (Followers: 2)
ASp     Open Access   (Followers: 4)
Assessing Writing     Hybrid Journal   (Followers: 15)
Assessment & Evaluation in Higher Education     Hybrid Journal   (Followers: 245)
Assessment for Effective Intervention     Hybrid Journal   (Followers: 16)
Assessment in Education: Principles, Policy & Practice     Hybrid Journal   (Followers: 49)
Assessment Update     Hybrid Journal   (Followers: 5)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5)
At-Ta'dib Jurnal Kependidikan Islam     Open Access  
At-Taqaddum     Open Access  
At-Turats     Open Access  
ATENA Didaktik     Open Access   (Followers: 5)
Atenas : Revista Científico Pedagógica     Open Access   (Followers: 1)
Athenea Digital     Open Access  
ATIKAN : Jurnal Kajian Pendidikan (Journal of Educational Studies)     Open Access  
Atthulab : Islamic Religion Teaching and Learning Journal     Open Access   (Followers: 1)
Aula Abierta     Open Access   (Followers: 2)
Aula de Encuentro     Open Access  
Australasian Journal of Educational Technology     Open Access   (Followers: 21)
Australasian Journal of Engineering Education     Hybrid Journal   (Followers: 2)
Australasian Journal of Gifted Education     Full-text available via subscription   (Followers: 7)
Australasian Marketing Journal (AMJ)     Hybrid Journal   (Followers: 4)
Australian Art Education     Full-text available via subscription   (Followers: 8)
Australian Educational Researcher     Hybrid Journal   (Followers: 31)
Australian Journal of Adult Learning     Full-text available via subscription   (Followers: 15)
Australian Journal of Career Development     Hybrid Journal   (Followers: 4)
Australian Journal of Dyslexia and Learning Difficulties     Full-text available via subscription   (Followers: 8)
Australian Journal of Education     Hybrid Journal   (Followers: 43)
Australian Journal of Environmental Education     Full-text available via subscription   (Followers: 10)
Australian Journal of Indigenous Education, The     Full-text available via subscription   (Followers: 11)
Australian Journal of Learning Difficulties     Hybrid Journal   (Followers: 5)
Australian Journal of Music Education     Full-text available via subscription   (Followers: 6)
Australian Journal of Public Administration     Hybrid Journal   (Followers: 476)
Australian Journal of Teacher Education     Open Access   (Followers: 28)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 7)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 6)
Australian Screen Education Online     Full-text available via subscription   (Followers: 3)
Australian TAFE Teacher     Full-text available via subscription   (Followers: 4)
Australian Universities' Review, The     Full-text available via subscription   (Followers: 4)
Autism     Hybrid Journal   (Followers: 343)
Avaliação : Revista da Avaliação da Educação Superior (Campinas)     Open Access  
Azalea: Journal of Korean Literature & Culture     Full-text available via subscription   (Followers: 4)
Bahastra     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 2)
Baltic Journal of Career Education and Management     Open Access   (Followers: 1)
Barn : Forskning om barn og barndom i Norden     Open Access   (Followers: 1)
Basastra : Jurnal Bahasa, Sastra, dan Pengajarannya     Open Access   (Followers: 1)
BC TEAL Journal     Open Access  
Becoming : Journal of the Georgia Middle School Association     Open Access   (Followers: 10)
Behavioural Sciences Undergraduate Journal     Open Access   (Followers: 5)
BELAJEA : Jurnal Pendidikan Islam     Open Access  
BELIA : Early Childhood Education Papers     Open Access   (Followers: 10)
BELT - Brazilian English Language Teaching Journal     Open Access   (Followers: 4)
Berkeley Review of Education     Open Access   (Followers: 9)
Biblioteca Escolar em Revista     Open Access  
Biblioteka i Edukacja     Open Access   (Followers: 4)
Bildung und Erziehung     Hybrid Journal   (Followers: 7)
Bio-Lectura     Open Access  
BIODIK : Jurnal Ilmiah Pendidikan Biologi     Open Access   (Followers: 1)
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access   (Followers: 1)
Bioma : Jurnal Ilmiah Biologi     Open Access  
Biosaintifika : Journal of Biology & Biology Education     Open Access   (Followers: 9)
Biosfer : Jurnal Biologi dan Pendidikan Biologi     Open Access  
Biosfer : Jurnal Tadris Biologi     Open Access  
BISE : Jurnal Pendidikan Bisnis dan Ekonomi     Open Access   (Followers: 1)
Biuletyn Historii Wychowania     Open Access  
BMC Medical Education     Open Access   (Followers: 50)
BMJ Simulation & Technology Enhanced Learning     Hybrid Journal   (Followers: 12)
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletim Técnico do Senac     Open Access  
Bordón : Revista de Pedagogía     Open Access   (Followers: 1)
British (Jurnal Bahasa dan Sastra Inggris)     Open Access   (Followers: 1)
British Educational Research Journal     Hybrid Journal   (Followers: 254)
British Journal of Educational Studies     Hybrid Journal   (Followers: 207)
British Journal of Educational Technology     Hybrid Journal   (Followers: 208)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
American Journal of Physics
Journal Prestige (SJR): 0.456
Citation Impact (citeScore): 1
Number of Followers: 54  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0002-9505 - ISSN (Online) 1943-2909
Published by AIP Homepage  [27 journals]
  • Radial velocity of a sound source in circular motion for illustrating the
           detection of an exoplanet
    • Authors: Kader Médjahdi
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 814-818, October 2020.
      Since the discovery of the first planet outside the solar system in 1995, the detection of exoplanets has been an attractive and engaging scientific field. This article intends to present briefly the radial velocity method for detecting the presence of an unseen planet orbiting a star. Based on an experimental setup, the presentation resorts to the analogy between sound waves and light waves. In particular, they can undergo the Doppler effect from which the radial velocity can be determined. Because the Doppler effect is easier to observe for sound waves than for light waves, a Bluetooth speaker simulates a star. It rotates in a horizontal circle with a constant angular speed, while emitting at two user-selected frequencies, simulating two spectral lines of a star. From the analysis of spectrograms, the radial velocities are deduced. Very good agreement is found between the experiment and theory.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:47:00Z
       
  • Structure of numerical algorithms and advanced mechanics
    • Authors: Siu A. Chin
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 883-894, October 2020.
      Most elementary numerical schemes found useful for solving classical trajectory problems are canonical transformations. This fact should be made more widely known among teachers of computational physics and Hamiltonian mechanics. From the perspective of advanced mechanics, unlike that of numerical schemes, there are no bewildering number of seemingly arbitrary elementary schemes based on Taylor's expansion. There are only two canonical first and second order algorithms, on the basis of which one can comprehend the structures of higher order symplectic and non-symplectic schemes. This work shows that most elementary algorithms up to the fourth-order can be derived from canonical transformations and Poisson brackets of advanced mechanics.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:58Z
       
  • A step forward in kinesthetic activities for teaching kinematics in
           introductory physics
    • Authors: Zachary Dale, Paul R. DeStefano, Lori Shaaban, Cora Siebert, Ralf Widenhorn
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 825-830, October 2020.
      We present a set of kinesthetic activities that utilize a local positioning system to teach kinematics in the physics classroom or laboratory. The activities build on previously reported activities in scope and complexity, incorporating two-dimensional motion and the simultaneous motions of multiple bodies. In these activities, students act out motions illustrated in graphs of kinematic quantities while holding a local positioning system device that tracks their position. Students are able to watch the data as they are graphed in real-time. These activities provide a kinesthetic experience of kinematics by allowing students to analyze their own movement rather than just the movement of specialized laboratory equipment.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:57Z
       
  • Adventures with historical physics apparatus
    • Authors: Thomas B. Greenslade
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 864-870, October 2020.
      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'
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:54Z
       
  • Lessons from transforming second-year honors physics lab
    • Authors: Danny Doucette, Brian D'Urso, Chandralekha Singh
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 838-844, October 2020.
      New technology like the Arduino microcontroller platform presents an opportunity to transform Beyond the First Year (BFY) physics labs to better prepare physics students for work in research labs and beyond. The flexibility, low cost, and power of these devices provide an attractive way for students to learn to use and master research-grade instrumentation. Therefore, we introduced new technology, including Arduino Due microcontroller boards, to a second-year honors physics lab in order to provide improved learning experiences for students. This transformation was implemented in three lab modules and focused on diminishing the black box nature of the traditional labs while encouraging students to engage in troubleshooting. The importance of troubleshooting was made evident to students by the instructor emphasizing it as an inevitable and central part of experimentation. This lab transformation also required that students perform work that was “above and beyond” the scope of the assigned experimental work for part of the course credit. While the technological aspects of the transformation were received well by a majority of students, our observations during the initial implementation suggested a need for some modifications to instructional practices in order to improve the learning and experiences for all students. In particular, we find that many students can benefit from additional scaffolding in order to complete above and beyond work. Similarly, we find that students in general, and under-represented students such as women, in particular, may need thoughtful intervention from the instructor, e.g., in order to avoid becoming isolated when the lab work is designed for pair work. Otherwise, some students may be left to work alone with a disproportionate work-load if students choose their own partners. With these lessons taken into account, recent student experiences in the transformed lab were notably improved.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:52Z
       
  • 2020 AAPT award citations at the virtual summer meeting
    • Abstract: American Journal of Physics, Volume 88, Issue 10, Page 792-794, October 2020.

      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:50Z
       
  • The quantum character of buckling instabilities in thin rods
    • Authors: T. A. Engstrom
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 845-850, October 2020.
      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.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:50Z
       
  • In this issue: October 2020
    • Authors: Beth Parks
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 789-790, October 2020.

      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:49Z
       
  • Captain Einstein: A VR experience of relativity
    • Authors: Karel Van Acoleyen, Jos Van Doorsselaere
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 801-813, October 2020.
      Captain Einstein is a virtual reality (VR) movie that takes you on a boat trip in a world with a slow speed of light. This allows for a direct experience of the theory of special relativity, much in the same spirit as in the Mr. Tompkins adventure by George Gamow (1939). In this paper, we go through the different relativistic effects (e.g., length contraction, time dilation, Doppler shift, light aberration) that show up during the boat trip, and we explain how these effects were implemented in the [math] video production process. We also provide exercise questions that can be used-in combination with the VR movie-to gain insight and sharpen the intuition on the basic concepts of special relativity.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:48Z
       
  • A simplified treatment of neutron slowing by elastic collisions
    • Authors: B. Cameron Reed
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 871-873, October 2020.
      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.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:47Z
       
  • A physical model for intuiting linear regression
    • Authors: Phillip Cervantes, Patricia Purdue, Jeffrey Steele
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 795-800, October 2020.
      The application of linear regression to data analysis is traditionally a tedious calculation delegated to a computer. This article presents a physical model to facilitate an intuitive way of thinking about the slope of a fit. In this simple model, data points are envisioned as beads applying torques on a massless, rigid, horizontal rod. To illustrate how this model can help colleagues directly address special questions about fits, the model is applied to two situations in which there are repeated measurements of data. This rod-and-bead model also arrives at the coefficient of determination formula in a very straightforward way and makes the recollection of the least-squared slope formula and coefficient of determination much easier.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:44Z
       
  • A perfectly inelastic collision: Bulk prey engulfment by baleen whales and
           dynamical implications for the world's largest cetaceans
    • Authors: Jean Potvin, David E. Cade, Alexander J. Werth, Robert E. Shadwick, Jeremy A. Goldbogen
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 851-863, October 2020.
      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.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:44Z
       
  • Comment on “The equivalence principle in the Schwarzschild geometry”
           [Am. J. Phys. 62, 1037 (1994)]
    • Authors: Rafael P. Bernar, Luís C. B. Crispino, Atsushi Higuchi, Haroldo C. D. Lima Junior
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 874-875, October 2020.
      In the article “The equivalence principle in the Schwarzschild geometry” [Am. J. Phys. 62, 1037–1040 (1994)], some manifestation of the equivalence principle in Schwarzschild spacetime was studied. We point out that the result for the Riemann-tensor component in this article is incorrect because only the first order terms in the metric expansion are taken into account. We show the corrected result, illustrating the importance of the second order terms in the approximate metric in computing curvature quantities.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:42Z
       
  • Lectures on Astrophysics
    • Abstract: American Journal of Physics, Volume 88, Issue 10, Page 895-896, October 2020.

      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:41Z
       
  • Connecting field and intensity correlations: The Siegert relation and how
           to test it
    • Authors: Dilleys Ferreira, Romain Bachelard, William Guerin, Robin Kaiser, Mathilde Fouché
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 831-837, October 2020.
      The Siegert relation relates electric field and intensity correlations of light, under given assumptions. After a brief derivation of the relation, we present an experimental setup that can be implemented in a student laboratory: it allows measuring both field and intensity correlations at the same time, thus providing a direct test of the Siegert relation. Some experimental results are presented when the scattering medium corresponds to a cold atomic cloud. As a conclusion, we discuss typical situations where the relation fails.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:39Z
       
  • Editorial firsts
    • Abstract: American Journal of Physics, Volume 88, Issue 10, Page 791-791, October 2020.

      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:38Z
       
  • Visualizing topological transport
    • Authors: Mariya A. Lizunova, Samuel Kuypers, Bernet Meijer, Ana Silva, Jasper van Wezel
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 876-882, October 2020.
      We present a mathematically simple procedure for explaining and visualizing the dynamics of quantized transport in topological insulators. The procedure serves to illustrate and clarify the dynamics of topological transport in general, but for the sake of concreteness, it is phrased here in terms of electron transport in a charge-ordered chain, which may be mapped exactly onto transport between edge channels in the Integer Quantum Hall Effect. This approach has the advantage that it allows a direct visualization of the real-space and real-time evolution of the electronic charges throughout the topological pumping cycle, thus demystifying how charge flows between remote edges separated by an insulating bulk, why the amount of transported charge is given by a topological invariant, and how continuous driving yields a discrete, quantized amount of transported charge.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:37Z
       
  • Generalizing thermal resistance and a general thermal engine
    • Authors: Mark F. Roll
      Abstract: American Journal of Physics, Volume 88, Issue 10, Page 819-824, October 2020.
      This article outlines a generalization of the thermal resistance concept used to model and quantify the rates of spontaneous heat transfer. This leads to the natural corollary that a Carnot cycle possesses zero thermal resistance and provides restatements of the Clausius and Kelvin statements of the second law of thermodynamics. Subsequently, basic aspects of a general thermal engine are modeled by the series combination of two non-zero thermal resistances with a Carnot cycle. With constant thermal resistances, the efficiency at maximum power is found to be in agreement with previous literature also concluding that engine power is zero at the Carnot efficiency. An explicit form limiting maximum power output to system thermal resistance and reservoir temperatures is given. Minimizing the thermal resistance maximizes power output, congruent with maximizing heat flow and entropy production. Implications of this model towards practical power generation are presented.
      Citation: American Journal of Physics
      PubDate: 2020-09-22T01:46:35Z
       
 
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