ELECTRICAL CONDUCTIVITY OF POTASSIUM CHLORIDE

The electrical conductivity of potassium chloride is discussed within the framework of a four-defect model of the crystal. The four defects are mobile anion and cation vacancies and immobile divalent cation impurities and divalent cation impurity-cation vacancy complexes. The Teltow formulation of the four-defect mode1 fails to describe precisely the measured electrical conductivity of KCl over the entire intrinsic and extrinsic range

Ionic Transport in Potassium Chloride

The electrical conductivity and chlorine ion diffusion in KC1 and KCl:SrC12 single crystals have been analyzed by least-squares methods, using as a model a perfect crystal perturbed by five defects: isolated anion vacancies, isolated cation vacancies, divalent cation impurities, divalent cation-impurity-cation-vacancy complexes, and vacancy pairs. The transport equations were derived from this five-defect model using a simple theory for noninteracting particles, except for the nearest-neighbor binding to form complexes and vacancy pairs, and using the same theory including long-range Coulomb interactions between the isolated defects. This latter theory yielded the better description of the experimental results. However, the analyses showed that significant nonrandom deviations exist between theory and experiment. These deviations exist in both the intrinsic and extrinsic regions of conductivity. The failure of existing concepts for these transport properties is discussed in terms of possible additional mechanisms, i.e., electrons, cationic Frenkel defects, or trivacancies, and in terms of more complete theoretical treatment

Abridged bibliography of photographic interpretation : selected with emphasis upon keys, techniques, and research

This bibliography, PIC Report No. 102A/50, is a literature review of the applications of aerial photography. It is a classified list covering applications for archaeology, engineering, forestry, geography, geology, soil science, and the study of vegetation. The copy used to create this digital document was borrowed from the Maury Oceanographic Library, Stennis Space Center, MS

The Mars Science Laboratory Touchdown Test Facility

In the Touchdown Test Program for the Mars Science Laboratory (MSL) mission, a facility was developed to use a full-scale rover vehicle and an overhead winch system to replicate the Skycrane landing event

Developing Interactive Curricular Elements with Teams of Faculty, Staff and Students

Students are continually searching for new resources to augment their learning. Online resources have become highly favored, especially by the millennial age group, for convenience, self-paced content, and versatility across learning styles. It has been reported that e-learning platforms are as effective as traditional face-to-face instruction, but may be best utilized when used as an adjunctive resource for teaching psychomotor skills.1,2 In a study about student confidence, results showed an increase in self-efficacy following the use of online learning materials.3 Blended learning, the next generation of web-based education, mixes advances in technology with creative faculty to fuse effective delivery methods that promote student engagement and learning. Re-designing all or portions of a course with a fresh prospective can re-energize faculty and render content more engaging for the learner but development can be hampered by limited time and resources. Our academic health science center launched a strategic initiative in 2013 for interprofessional student and faculty teams to build interactive e-learning modules. This presentation will focus on the significant role of medical and allied health science students in the development of interactive curricular elements, which can save faculty time and resources while enhancing student learning. Through this program, a large interprofessional network of collaborators with varying skill sets was created. The network includes nearly 100 students and faculty members from medical and allied health professions that have created over 50 e-learning projects. The greatest benefits of engaging student-faculty teams as e-learning developers have been the trust and cohesion, resource sharing and brokering of information consistent with the social capital theory. In addition, the high quality of e-modules resulting from the creative use of media-rich content in student designs increased peer engagement. With students as e-learning collaborators, faculty as content experts, and instructional design expertise we increased the production of curricular-based e-learning modules within a budget-friendly model while reducing faculty time required for development. More importantly, many additional modules have been created by teams outside of the formal institutional mechanism, suggesting the widespread adoption of this teaching modality in an expanding network. Regardless of educational trends, faculty who implement a novel learning tool should be aware of the learner’s cognitive load, or working memory, which has a limited capacity. Each module is evaluated using a checklist to examine accessibility and educational design. There are content development strategies using visual and auditory channels to maximize learner efficiency and minimize distractions for long-term memory development.4 The presenters will share an overview of this initiative and practical experience. We will a) describe the resultant network structure and composition of faculty, students and staff involved; b) provide a step-by-step timeline of how the e-learning modules went from a sketch and brainstormed idea to a tangible and useful product and the important role of instructional designers and an interprofessional peer-faculty team, c) share resources used for creation, and d) demonstrate exemplars on topics such as joint examination, the cardiopulmonary system, International Classification of Functioning, scanning a hospital room, and reviewing a medical chart

Surfaces, depths and hypercubes: Meyerholdian scenography and the fourth dimension

An appreciation of Meyerhold’s engagement with theatrical space is fundamental to understanding his directorial and pedagogic practice. This article begins by establishing Meyerhold’s theoretical and practical engagement with theatre as a fundamentally scenographic process, arguing for a reconceptualisation of the director as ‘director-scenographer’. Focusing on the construction of depth and surface in Meyerholdian theatre, the article goes on to identify trends in the director’s approach to space, with an emphasis on the de-naturalisation of depth on stage. This denaturalisation is seen as taking three forms: the rejection of depth as a prerequisite in theatrical space, the acknowledgement of the two-dimensional surface as surface, and the restructuring of depth space into a series of restricted planes. The combination of these trends indicates a consistent and systematic process of experimentation in Meyerhold’s work. In addition, this emphasis on depth and surface, and the interaction between the two, also highlights the contextualisation of Meyerhold’s practice within the visual, philosophical and scientific culture of the early twentieth century, echoing the innovations in n-dimensional geometry and particularly, the model of the fourth spatial dimension seen in the work of Russian philosopher P. D. Ouspensky

Examining Factors in the Research Institute on Addictions Self-Inventory (RIASI): Associations with Alcohol Use and Problems at Assessment and Follow-Up

Impaired driving is a leading cause of alcohol-related deaths and injuries. Rehabilitation or remedial programs, involving assessment and screening of convicted impaired drivers to determine problem severity and appropriate programs, are an important component of society’s response to this problem. Ontario’s remedial program, Back on Track (BOT), involves an assessment process that includes administration of the Research Institute on Addictions Self-Inventory (RIASI) to determine assignment to an education or treatment program. The purpose of this study is to identify factors within the RIASI and examine how factor scores are associated with alcohol use and problem indicators at assessment and six-month follow-up. The sample included 22,298 individuals who completed BOT from 2000 to 2005. Principal component factor analysis with varimax rotation was conducted on RIASI data and an eight factor solution was retained: (1) Negative Affect, (2) Sensation Seeking, (3) Alcohol-Quantity, (4) Social Conformity, (5) High Risk Lifestyle, (6) Alcohol Problems, (7) Interpersonal Competence, and (8) Family History. Regression analyses were conducted to examine associations between factors and alcohol and problem measures obtained at assessment and at follow-up. Most factors, except for Interpersonal Competence, were associated with more alcohol use and problems at assessment. A similar pattern was observed at 6-month follow-up, but interestingly some factors (Negative Affect, Sensation Seeking, Alcohol-Quantity and Family History) predicted fewer days of alcohol use. The Interpersonal Competence factor was associated with significantly lower levels of alcohol use and problems at both assessment and follow-up. This work suggests that the RIASI provides information on several domains that have important relationships with alcohol problem severity and outcomes

Using Facebook Advertising to Connect with Extension Audiences

There is considerable interest in using social media to reach Extension audiences. The study\u27s main objective was to assess the effectiveness of Facebook promotion and event advertising on creating new client contacts as measured by Likes. The results show the fan base for each county increased slowly prior to and following the Facebook ad, while it increased more rapidly during the advertisement period. Thus, Facebook advertising appears to be an effective tool to increase awareness of Extension Facebook pages. Extension professionals should consider investing in Facebook advertising to expand their fan base