ISSN:0031-9228    

DOI:10.1063/1.2186277

出版商:AIP    

年代:1906

数据来源: AIP

摘要:

The ancient Greeks were aware of the phenomenon of magnetic order in lodestone, a type of rock containing the ferromagnet magnetiteFe3O4.Magnetic moments in a ferromagnet tend to align and thereby sum to an easily observed macroscopic magnetic moment. The absence of such a moment even in ordered antiferromagnets is the reason their discovery is comparatively recent. It had to await the development of Louis Ne´el's microscopic theory of spin interactions in the 1930s and the neutron diffraction measurement of MnO in 1949 by Clifford Shull and Stuart Smart.

ISSN:0031-9228    

DOI:10.1063/1.2186278

出版商:AIP    

年代:1906

数据来源: AIP

摘要:

During the past 20 years, the focus of physics education research has shifted several times. In the early 1980s, PER was largely concerned with alternative conceptions that students held about various physics ideas. The mid‐1980s saw an explosion of interest in computer‐based and computer‐aided instruction. In the early 1990s, the PER community published several research‐based curricula that promoted activity‐based or inquiry‐based learning, and throughout the decade the community was increasingly focused on student cognition. As a result of the past two decades of study, physics education researchers know a great deal about how students conceptualize physics and what makes for effective instruction. What is missing is a debate at an international level on the selection of curricular content. In other words, what physics should we teach?

ISSN:0031-9228    

DOI:10.1063/1.2186279

出版商:AIP    

年代:1906

数据来源: AIP

摘要:

Remember when you took physics in high school? You were probably one of a select few. But today, more than a million students are taking high‐school physics in the US. Chances are, however, that it's not the same physics course you experienced.

ISSN:0031-9228    

DOI:10.1063/1.2186280

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2405530

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2186281

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2186282

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2186283

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2186284

出版商:AIP    

年代:1906

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2186285

出版商:AIP    

年代:1906

数据来源: AIP