Movie Performance and Recent Trends in Music and Video File-Sharing

This article introduces a theoretical framework that can serve as a conceptual basis for media economics research of the development of media industries. The framework incorporates dynamic expansion and contraction processes and the constant interaction between strategy, structure, and government policy. The focus in this article is on strategic behavior of firms in the communications industry. I posit that these organizations are part of a system of organizations. As a part of this system the communications firm changes and affects the structure of the system, but at the same time the organization is affected by this same environment. The capability of media organizations to develop, augment, structure, and adapt a bundle of internal and external competencies is the central organizing concept.     

How Item Writers Understand Depth of Knowledge

An important part of test development is ensuring alignment between test forms and content standards. One common way of measuring alignment is the Webb (1997, 2007) alignment procedure. This article investigates (a) how well item writers understand components of the definition of Depth of Knowledge (DOK) from the Webb alignment procedure and (b) how consistent their DOK ratings are with ratings provided by other committees of educators across grade levels, content areas, and alternate assessment levels in a Midwestern state alternate assessment system. Results indicate that many item writers understand key features of DOK. However, some item writers struggled to articulate what DOK means and had some misconceptions. Additional analyses suggested some lack of consistency between the item writer DOK ratings and the committee DOK ratings. Some notable differences were found across alternate assessment levels and content areas. Implications for future item writing training and alignment studies are provided.     

看行为经济学如何解释市场泡沫

市场泡沫是资产价格相对于经济基础条件背离的膨胀过程。其实,无论是哪个市场,凡是追求利润的地方就必定会有泡沫的产生——但这些泡沫应如何定义,产生的原因是什么?本文从行为经济学的相关理论出发,通过分析人的心理与生物行为等偏好,为你解读关于"市场泡沫"的那些事儿。     

Science Teachers’ Views on CoRes and PaP-eRs as a Framework for Articulating and Developing Pedagogical Content Knowledge

This paper reports on a study which was designed to examine how CoRes (Content Representations) and PaP-eRs (Pedagogical and Professional-experience Repertoires) might impact the practice of science teachers by considering how they might value (or not) pedagogical content knowledge (PCK) as part of their professional knowledge. The paper is based on a 2?year longitudinal study that used CoRes and PaP-eRs as a form of intervention with a group of teachers (n?=?6) to determine how they interpreted, used and developed their understanding of PCK over time. The study concluded that the participating teachers developed rich understandings of their professional knowledge of science teaching and were of the view that CoRes and PaP-eRs were significant in shaping that development. As a consequence, the study also validates the use of CoRes and PaP-eRs as a meaningful methodology for examining science teachers?? PCK.     

City doctors: A systemic approach to transform Colon City,Panama

A project for the president and minister of tourism of Panama was designed to transform (not change or tinker with) the City of Colon. Colon is the second largest city in Panama and the eastern entrance to the Panama Canal, and it is a city in crisis, with high crime and a low standard of living for most citizens, which is teetering on the edge of community collapse. Applying the concepts and tools of Mega thinking and planning, and using the Bernardez two‐level business case, it has been shown how the entire city could be transformed with a positive return on investment in the first year.     

Eyeballs in the Fridge: Sources of early interest in science

This paper examines the experiences reported by scientists and graduate students regarding the experiences that first engaged them in science. The interviews analysed for this paper come from Project Crossover, a mixed‐methods study of the transition from graduate student to PhD scientist in the fields of chemistry and physics. This analysis involved review of 116 interviews collected from graduate students and scientists and focused on the timing, source, and nature of their earliest interest in science. The majority (65%) of participants reported that their interest in science began before middle school. Females were more likely to report that their interest was sparked by school‐related activities, while most males recounted self‐initiated activities. Our findings indicate that current policy efforts (which focus on high school science reform) to increase the numbers of students studying in the science fields, may be misguided.     

“Talent” and the Misrecognition of Social Advantage in Specialized Arts Education

Attention has been drawn to the persistent underrepresentation of underserved populations in gifted education programs. Though a small number of working-class students, students of color, recent immigrants, and students with limited English proficiency attend these programs, access to gifted education remains closely linked to White and upper-middle-class populations. The question remains: how, in a system that claims to be committed to achieving equity, do such disparities come to be and, furthermore, how are they justified? In this article we attempt to make sense of this phenomenon by examining how discourses of talent are mobilized within the context of a particular kind of gifted education program: a specialized arts program within a Canadian public secondary school.     

Integrating different tracking systems in football: multiple camera semi-automatic system,local position measurement and GPS technologies

Abstract

During the past decade substantial development of computer-aided tracking technology has occurred. Therefore, we aimed to provide calibration equations to allow the interchangeability of different tracking technologies used in soccer. Eighty-two highly trained soccer players (U14–U17) were monitored during training and one match. Player activity was collected simultaneously with a semi-automatic multiple-camera (Prozone), local position measurement (LPM) technology (Inmotio) and two global positioning systems (GPSports and VX). Data were analysed with respect to three different field dimensions (small, <30 m² to full-pitch, match). Variables provided by the systems were compared, and calibration equations (linear regression models) between each system were calculated for each field dimension. Most metrics differed between the 4 systems with the magnitude of the differences dependant on both pitch size and the variable of interest. Trivial-to-small between-system differences in total distance were noted. However, high-intensity running distance (>14.4 km · h^?1) was slightly-to-moderately greater when tracked with Prozone, and accelerations, small-to-very largely greater with LPM. For most of the equations, the typical error of the estimate was of a moderate magnitude. Interchangeability of the different tracking systems is possible with the provided equations, but care is required given their moderate typical error of the estimate.