发布求助
文献互助 智能选刊 最新文献

American Journal of Physics最新文献

筛选
英文 中文
2023 AAPT award citations at the summer meeting in Sacramento, California 2023年AAPT颁奖典礼在加州萨克拉门托举行
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0161894
B. Parks
{"title":"2023 AAPT award citations at the summer meeting in Sacramento, California","authors":"B. Parks","doi":"10.1119/5.0161894","DOIUrl":"https://doi.org/10.1119/5.0161894","url":null,"abstract":"","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47657479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Introducing corrugated surfaces in electrostatic problems via a perturbative approach 用微扰方法引入静电问题中的波纹面
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0099928
Alexandre P. Costa, Lucas Queiroz, E. Nogueira, D. T. Alves
{"title":"Introducing corrugated surfaces in electrostatic problems via a perturbative approach","authors":"Alexandre P. Costa, Lucas Queiroz, E. Nogueira, D. T. Alves","doi":"10.1119/5.0099928","DOIUrl":"https://doi.org/10.1119/5.0099928","url":null,"abstract":"In electromagnetism courses, students often solve Poisson's equation for a point charge in the presence of an infinitely large perfectly conducting planar surface, usually by the method of images. However, no surface is perfectly flat; so at some level, corrugations must be introduced to model the real world. Clinton et al. [Phys. Rev. B 31, 7540 (1985)] solved the problem, including corrugations, using a perturbative calculation of the corresponding Green's function. We provide a detailed pedagogical review of this calculation and extend it in order to solve for the electrostatic potential of a corrugated neutral conducting cylinder in the presence of a uniform electric field. These calculations can be used as pedagogical examples of this perturbative approach in electromagnetism courses.","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48002632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In this issue: August 2023 本期：2023年8月
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0164053
C. Marrache-Kikuchi, R. Olsen, B. Parks, B. Cameron Reed, Donald Salisbury, Todd Springer
{"title":"In this issue: August 2023","authors":"C. Marrache-Kikuchi, R. Olsen, B. Parks, B. Cameron Reed, Donald Salisbury, Todd Springer","doi":"10.1119/5.0164053","DOIUrl":"https://doi.org/10.1119/5.0164053","url":null,"abstract":"","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43966019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rendezvous revisited: The search for fast-intercept solutions 重访会合：寻找快速拦截解决方案
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0095559
E. Edlund
{"title":"Rendezvous revisited: The search for fast-intercept solutions","authors":"E. Edlund","doi":"10.1119/5.0095559","DOIUrl":"https://doi.org/10.1119/5.0095559","url":null,"abstract":"Orbital interception scenarios typically involve a chaser that is actively maneuvered to encounter an inertial target and may be undertaken for a variety of purposes, including docking spacecraft or colliding with an asteroid for planetary defense studies. Viable intercept trajectories are constrained by the free-fall path of the target and by auxiliary conditions such as the available time or fuel budget. Whereas a constraint on the time to intercept is central to the (extensively studied) Lambert problem, a less common but more visually compelling constraint is that of the available fuel for intercept. This was the basis of a recent study [E. M. Edlund, Am. J. Phys. 89, 559–566 (2021)], which analyzed one of the two families of possible intercept solutions that were identified. The second family, studied in more detail here, describes intercepts at all points in the orbit and has the interesting property that it admits fast-intercept solutions. This work concludes the analysis of this problem; it develops a general condition that describes both families of intercepts, presents representative solutions, and considers the sensitivity of these solutions to errors in the control parameters.","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41928154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Perfect and imperfect pitchfork bifurcations in a V-shaped spring-mass system: Comment on “Hysteresis in a simple V-shaped spring-mass system” [Am. J. Phys. 89, 663–665 (2021)] V形弹簧-质量系统中完美和不完美的干草叉分叉：对“简单V形弹簧质量系统中的磁滞”的评论[Am.J.Phys.89663–665（2021）]
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0079561
J. Bissell, A. M. Nagaitis
{"title":"Perfect and imperfect pitchfork bifurcations in a V-shaped spring-mass system: Comment on “Hysteresis in a simple V-shaped spring-mass system” [Am. J. Phys. 89, 663–665 (2021)]","authors":"J. Bissell, A. M. Nagaitis","doi":"10.1119/5.0079561","DOIUrl":"https://doi.org/10.1119/5.0079561","url":null,"abstract":"","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45905292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cosmological horizons 宇宙学视野
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0127840
Michele Re Fiorentin, Stefano Re Fiorentin
{"title":"Cosmological horizons","authors":"Michele Re Fiorentin, Stefano Re Fiorentin","doi":"10.1119/5.0127840","DOIUrl":"https://doi.org/10.1119/5.0127840","url":null,"abstract":"The recently unveiled deep-field images from the James Webb Space Telescope have renewed interest in what we can and cannot see of the universe. Answering these questions requires understanding the so-called “cosmological horizons” and the “Hubble sphere.” Here, we review the topic of cosmological horizons in a form that university physics teachers can use in their lessons, using the latest data about the so-called standard “Lambda cold dark matter” (ΛCDM) model. Graphical representations are plotted in terms of both conformal and proper coordinates as an aid to understand the propagation of light in the expanding universe at various epochs.","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48396456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An alternative way to solve the small oscillations problem 解决小振荡问题的另一种方法
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-08-01 DOI: 10.1119/5.0106530
S. Hojman
{"title":"An alternative way to solve the small oscillations problem","authors":"S. Hojman","doi":"10.1119/5.0106530","DOIUrl":"https://doi.org/10.1119/5.0106530","url":null,"abstract":"An alternative approach to the n-dimensional small oscillations problem is presented. This method is based on the finding of n new independent constants of motion to get the n eigenfrequencies and the n normal coordinates of the problem. These constants of motion exist and may be explicitly constructed for any small oscillations problem. Three examples are presented. One of them involves solving a five-dimensional small oscillations problem whose solution is usually obtained by finding the roots of a quintic algebraic equation. The approach constructed here is especially suited to deal with high-dimensional problems. Applications to small oscillations as well as to high-degree algebraic equation solutions are discussed.","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45747658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Memories of a mid-20th century electrical measurements laboratory and its instrumentation 回忆一个20世纪中期的电测量实验室和它的仪器
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-07-01 DOI: 10.1119/5.0155766
T. Greenslade
{"title":"Memories of a mid-20th century electrical measurements laboratory and its instrumentation","authors":"T. Greenslade","doi":"10.1119/5.0155766","DOIUrl":"https://doi.org/10.1119/5.0155766","url":null,"abstract":"There was a time when undergraduate physics majors took a junior-level course in Electricity and Magnetism, accompanied by a semester of laboratory work, learning to make precision electrical measurements. This laboratory experience is long gone, replaced by coursework in digital and analog electronics. Even the latter has been downplayed in favor of a course in the use of digital computers to solve problems in physics. In this article, I will discuss the course that I took as an undergraduate at Amherst College in the late 1950s and then taught as a young faculty member at Kenyon College in the late sixties. I was a participant in the demise of the E&M laboratory and the rise of the ensuing vacuum tube and digital electronics course. I will concentrate on the precision apparatus, which is presently living out its life in the dusty back shelves of apparatus closets. This may help new faculty members to answer the perennial question: It is attractive, but what is it and how was it used?","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45372141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of ill-conditioned cases of a mass moving on a sphere with friction 质量在有摩擦力的球体上运动的病态情况分析
IF 0.9 4区 教育学
American Journal of Physics Pub Date : 2023-07-01 DOI: 10.1119/5.0063834
T. McDaniel
{"title":"Analysis of ill-conditioned cases of a mass moving on a sphere with friction","authors":"T. McDaniel","doi":"10.1119/5.0063834","DOIUrl":"https://doi.org/10.1119/5.0063834","url":null,"abstract":"Previous work treated the problem of a mass sliding over a rough spherical surface in broad generality, providing both analytic and numerical solutions. This paper examines special cases of 2D motion along a surface meridian when the initial speed is precisely chosen so that the sliding mass nearly stops before speeding up and subsequently leaving the surface. Carrying the solution for these critical cases into the time domain via both an analytical method and numerical integration adds richness that might otherwise be missed. The numerical method raises practical mathematical issues that must be handled carefully to obtain accurate results. Although conceptually simple, this classical mechanics problem is an excellent vehicle for students to gain proficiency with mathematical analysis tools and further their appreciation for how applied mathematics can bring new insight into situations where intuition may fall short.","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43455529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In this issue: July 2023 本期:2023年7月
4区 教育学
American Journal of Physics Pub Date : 2023-07-01 DOI: 10.1119/5.0159258
Joseph C. Amato, Mario Belloni, Harvey Gould, Claire A. Marrache-Kikuchi, Beth Parks, B. Cameron Reed, Donald Salisbury, Jan Tobochnik
{"title":"In this issue: July 2023","authors":"Joseph C. Amato, Mario Belloni, Harvey Gould, Claire A. Marrache-Kikuchi, Beth Parks, B. Cameron Reed, Donald Salisbury, Jan Tobochnik","doi":"10.1119/5.0159258","DOIUrl":"https://doi.org/10.1119/5.0159258","url":null,"abstract":"","PeriodicalId":7589,"journal":{"name":"American Journal of Physics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135209915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信