Evidence for the secondary structure of lithium fluoride by atomic diffraction

When atom waves were reflected from a cleaved [100] surface of a LiF crystal, diffuse secondary spectra appeared which were well-defined in direction but were otherwise unresolved. This is regarded as evidence for a secondary structure on the surface of the crystal the directions of which are those of the cleavage planes. This secondary structure may have the period given by the theory of Zwicky but if so it must be slightly irregular either as regards this period or as regards the reflecting power of the intervening surfaces.The writer wishes to acknowledge the assistance of Mr. M. A. Roesch in making the experiments.     

Towards a Cultural Understanding of the Disability and Deaf Experience: Implications of a Content Analysis of Introductory Special and Multicultural Education Textbooks

This paper summarizes and discussing the findings of two content analyses of introductory textbooks to special education and multicultural education conducted to determine the extent to which disability and Deaf culture are represented and discussed. Findings of both studies indicated minimal discussion of Disability and Deaf culture, a heavy reliance on perspectives of persons who are not disabled or Deaf about the Disability and Deaf experience, and inaccurate representations and information about Disability and Deaf culture. This paper is a follow-up discussion of the implications of the findings of these studies. A rationale and recommendations for supporting a cultural understanding of the Disability and Deaf experience are presented. In addition, recommendations are suggested for engaging disabled and deaf persons about their shared and collective experience and for promoting cultural competence and proficiency with respect to the Disability and Deaf experience.     

Managing arterial health in adults with metabolic diseases: Is high-intensity interval exercise the answer? Response to the commentary by Lopes et al.

Dear editor, We thank Lopes et al.1 for their interest in our study and for writing an insightful commentary based on our findings, which were recently publishe...     

The Nature of Science as Represented in Chemistry Textbooks Used in Nigeria

Research in Science Education - The development of science education in many countries is varied and diverse. However, one common goal of science education in the different contexts is the focus on...     

We Really Do Mean It: Implementing Language Arts Standard #3 with Opinionnaires

For school improvement, more teachers need to function as leaders. Understanding the various dimensions of teacher leadership is requisite knowledge for encouraging the development of more teachers as leaders. Teacher leaders can fulfill multiple roles as they encounter obstacles in schools. The author addresses the challenge of supporting teachers in leadership roles, presents a model, and recommends ways for administrators and teacher educators to shape teacher leaders.