Four phases of video streaming: A case study of medical teaching

This article examines video streaming in teaching situations with varying degrees of student activation ranging from lectures to team-based learning. The article is a case study of the implementation of video streaming at the Department of Medicine, Aarhus University. The aim of the article is to develop a model of video streaming in student-centered teaching. The research question is what characterizes the phases of video streaming in relation to student-centered teaching? The article develops a model with four phases of video streaming based on the case study and the literature on learning design. The article argues that both educators, e-moderators and students play a role in making video streaming a useful teaching technology. There are advantages to embedding the technology in a social educational context in relation to roles and phases of teaching. In collaboration with educators, instructional developers must learn to see the possibilities of video streaming from the perspective of the instructional process.Denne artikel undersøger videostreaming i forskellige undervisningssituationer med varierende grader af studenteraktivering lige fra forelæsninger til team-baseret læring. Artiklen er et casestudie om implementering af video-streaming på Medicin, Aarhus Universitet. Artiklens mål er at udvikle en model af videostreaming i studenter-centreret undervisning. Forskningsspørgsmålet er: Hvad kendetegner faser i video-streaming i forhold til studentercentreret undervisning? Artiklen udvikler en model med fire faser af videostreaming baseret på et empirisk casestudie og teori om læringsdesign. Artiklen argumenterer for at både undervisere, e-moderatorer og studerende spiller en rolle i forhold til at gøre video-streaming til en nyttig undervisningsteknologi. Selvom universitetsundervisere relativt nemt kan udvikle videoer med sin smartphone eller ved hjælp af et digitalt videokamera, er der fordele ved at indlejre teknologien i en social uddannelsessammenhæng i forhold til roller og faser i undervisningsforløb. Undervisningsudviklere skal i samarbejde med undervisere lære at se mulighederne i video-streaming ud fra et undervisningsforløb

Enlarged cerebrospinal fluid spaces in opiate-dependent male patients: A stereological CT study

Computed tomography was performed in 9 male patients with a diagnosis of opiate dependence and in 9 age-matched psychiatric controls (neurotic depression). Patients with a history or diagnosis of another substance dependence (alcohol, cocaine, cannabis) were excluded from the study. The volumes of internal and external components of cerebrospinal fluid (CSF) were measured with a point-counting stereological method. Analysis of variance with age as a covariate revealed a significant enlargement of external and external CSF spaces in male patients with opiate dependence. There was no significant correlation between the length of opiate dependence and the volumes of internal and external CSF spaces. The present results suggest that opiate dependence is associated with structural brain alterations. However, the relationship between opiate dependence and structural brain changes is complex and still not well understood

Primary and secondary angiosarcomas: a comparative single-center analysis

Background: Angiosarcomas (AS) are rare vascular malignancies. They are subdivided into primary (PAS) and secondary angiosarcomas (SAS). The objective was to compare the characteristics of AS subtypes. Methods: Eighteen PAS and ten SAS patients treated at our institution between 2004 and 2012 were included in this study. Results: Median age of PAS and SAS patients was 52.9 and 64.2 years, respectively (p = 0.1448). The percentage of women was 27.8% for PAS, but 80.0% for SAS (p = 0.0163). While PAS occurred throughout the body, the majority of SAS arose from the breast (p = 0.0012). All SAS were radiation-induced with a median latency of 7.7 years. The majority of patients with PAS and SAS underwent surgery as primary or recurrence treatment (p > 0.95). Local recurrence was developed by 27.8% of PAS and 50.0% of SAS (p = 0.4119). 61.1% of PAS metastasized, but only 40.0% of SAS (p = 0.4328). Median overall survival for PAS and SAS was 19 and 57 months, respectively (p = 0.2306). Conclusion: Radical surgery remains the mainstay of both primary and recurrence treatment. SAS show a high local recurrence rate, while PAS tend towards developing early metastases. Overall, prognosis is poor for both groups

Appropriate Disturbances: Team Development in Sports and Business

In this article, we will present an anthropological research project that explores possible benefits of comparing a professional handball club and a software company. More specifically, we turn our attention to the phenomenon of “disturbances.” In workplace contexts, disturbances are most often experienced as hindering focus and immersion, thus having a negative impact on job performance. However, by exploring everyday practices in the Danish professional handball club Bjerringbro-Silkeborg Handball, it becomes apparent that (former) head coach Peter Bredsdorff Larsen deliberately uses what he calls “appropriate disturbances” to provoke change and give direction to processes of team development. This causes us to ask one of the fundamental questions of our overall research project: what form would such appropriate disturbances take in a software company? In an effort to explore this question, we describe our experiments with the concept of “reflection time” as an appropriate disturbance to team development in the software company Systematic. We argue that such disturbances can create moments and spaces in which the potential for improvement and development emerges through a temporary destabilization of everyday life in the workplace

The Diamond, April 5, 2012

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Using Unmanned Aerial Vehicles to assess the rehabilitation performance of open cut coal mines

Mine sites are routinely required to rehabilitate their post-mining landforms with a safe, stable and sustainable land-cover. To assess these post-mining landforms, traditional on-ground field monitoring is generally undertaken. However, these labour intensive and time-consuming measurements are generally insufficient to catalogue land rehabilitation efforts across the large scales typical of mining sites (>100 ha). As an alternative, information derived from Unmanned Aerial Vehicles (UAV) can be used to map rehabilitation success and provide evidence of achieving rehabilitation site requirements across a range of scales. UAV based sensors have the capacity to collect information on rehabilitation sites with extensive spatial coverage in a repeatable, flexible and cost-effective manner. Here, we present an approach to automatically map indicators of safety, stability and sustainability of rehabilitation efforts, and demonstrate this framework across three coalmine sites. Using multi-spectral UAV imagery together with geographic object-based image analysis, an empirical classification system is proposed to convert these indicators into a status category based on a number of criteria related to land-cover, landform, erosion, and vegetation structure. For this study, these criteria include: mapping tall trees (Eucalyptus species); vegetation extent; senescent vegetation; extent of bare ground; and steep slopes. Converting these land-cover indicators into appropriate mapping categories on a polygon basis indicated the level of rehabilitation success and how these varied across sites and age of the rehabilitation activity. This work presents a framework and workflow for undertaking a UAV based assessment of safety, stability and sustainability of mine rehabilitation and also provides a set of recommendations for future rehabilitation assessment efforts