The Benefits of an Augmented Reality Magic Mirror System for Integrated Radiology Teaching in Gross Anatomy     

Felix Bork  Leonard Stratmann  Stefan Enssle  Ulrich Eck  Nassir Navab  Jens Waschke  Daniela Kugelmann 《Anatomical sciences education》2019,12(6):585-598

Early exposure to radiological cross-section images during introductory anatomy and dissection courses increases students’ understanding of both anatomy and radiology. Novel technologies such as augmented reality (AR) offer unique advantages for an interactive and hands-on integration with the student at the center of the learning experience. In this article, the benefits of a previously proposed AR Magic Mirror system are compared to the Anatomage, a virtual dissection table as a system for combined anatomy and radiology teaching during a two-semester gross anatomy course with 749 first-year medical students, as well as a follow-up elective course with 72 students. During the former, students worked with both systems in dedicated tutorial sessions which accompanied the anatomy lectures and provided survey-based feedback. In the elective course, participants were assigned to three groups and underwent a self-directed learning session using either Anatomage, Magic Mirror, or traditional radiology atlases. A pre- and posttest design with multiple choice questions revealed significant improvements in test scores between the two tests for both the Magic Mirror and the group using radiology atlases, while no significant differences in test scores were recorded for the Anatomage group. Furthermore, especially students with low mental rotation test (MRT) scores benefited from the Magic Mirror and Anatomage and achieved significantly higher posttest scores compared to students with a low MRT score in the theory group. Overall, the results provide supporting evidence that the Magic Mirror system achieves comparable results in terms of learning outcome to established anatomy learning tools such as Anatomage and radiology atlases.  相似文献   

Learning Metabolism by Problem‐Based Learning Through the Analysis of Health or Nutrition Articles from the Web in Biochemistry     

Carola E. Bruna  Nicole A. Valenzuela  Daniela V. Bruna  Armando Lozano‐Rodríguez  Carolina G. Mrquez 《Journal of Food Science Education》2019,18(2):37-44

Problem‐based learning using authentic material from the web was used to teach metabolism in a biochemistry course. In place of traditional lectures, students’ analyzed health or nutrition articles from newspapers and magazines, which were debatable from a scientific point of view, following the principles of problem‐based learning. A mixed method was used to assess the students’ perception, use of sources of information and web services while performing the task, and changes in self‐directed learning. Students’ perception was particularly positive. The majority stated that the methodology helped them to apply knowledge to real life and that they learned about the topic analyzed by their group. The perception that problem‐based learning promotes the ability to solve problems, critical thinking, and collaborative work is noteworthy. Tutors considered that teams identified the problem and concluded correctly, noticing students’ enthusiasm and motivation. The methodology also promoted scientific reading. More importantly, a significant improvement in self‐directed learning of the 2014 cohort was detected. This intervention suggests that this methodology is a valuable alternative to motive and promote self‐learning; representing an opportunity to shift the focus of instruction from the teacher to the student. The design of the activity and materials are described in detail. Also, limitations and solutions are discussed.  相似文献   

The public response to innovative strategies for the control of biodeterioration in archaeological hypogea     

Patrizia Albertano  Daniela Pacchiani  Enrico Capucci 《Journal of Cultural Heritage》2004,5(4):399-407

Between April and September 2003, 1500 visitors of the Catacomb of St. Callistus participated to a scientific research by filling in a questionnaire to express their opinion about a new illumination system experimentally set up in the Ocean’s Cubiculum. Their answers were statistically evaluated and represented the first public opinions on this archaeological site, including their knowledge of conservation problems and their positive attitude towards the use of new strategies for the preservation of this monument.  相似文献   

Developing hypermedia with a rapid prototyping approach: a case study     

Laura Helena Porras  Daniela Giodano 《British journal of educational technology : journal of the Council for Educational Technology》1995,26(1):59-61

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Knowledge-intensity as an organisational characteristic     

Jonna Käpylä  Harri Laihonen  Antti Lönnqvist  Daniela Carlucci 《知识管理研究与实践》2011,9(4):315-326

The sector of knowledge-intensive business services (KIBS) has a central role in modern economies. However, there are no explicit and generally acknowledged criteria for characterising KIBS or other knowledge-intensive organisations. In addition, the concept of knowledge-intensity has no significant managerial use. This paper aims to widen the existing understanding about the concept of knowledge-intensity and take a step towards its operational application and managerial usefulness. Methodologically, two steps are carried out. First, a conceptual study based on intellectual capital literature and literature on knowledge-intensive firms is carried out. Second, an interview study (n=8) is carried out to empirically examine the role of knowledge assets in selected KIBS organisations. This paper contributes by tackling the vagueness of the concept of knowledge-intensity: the paper demonstrates that there are different types of ‘knowledge-intensity profiles’ among KIBS companies and that knowledge assets can be used as an analytical framework to identify the sources of value creation.  相似文献   

Escape From Metaignorance: How Children Develop an Understanding of Their Own Lack of Knowledge     

Michael Rohwer  Daniela Kloo  Josef Perner 《Child development》2012,83(6):1869-1883

Previous research yielded conflicting results about when children can accurately assess their epistemic states in different hiding tasks. In Experiment 1, ninety‐two 3‐ to 7‐year‐olds were either shown which object was hidden inside a box, were totally ignorant about what it could be, or were presented with two objects one of which was being put inside (partial exposure). Even 3‐year‐olds could assess their epistemic states in the total ignorance and the complete knowledge task. However, only children older than 5 could assess their ignorance in the partial exposure task. In Experiment 2 with one hundred and one 3‐ to 7‐year‐olds, similar results were found for children under 5 years even when more objects were shown in partial exposure tasks. Implications for children’s developing theory of knowledge are discussed.  相似文献   

Orthographic Neighborhood-Size Effects on the Reading Aloud of Italian Children With and Without Dyslexia     

Chiara Valeria Marinelli  Daniela Traficante  Pierluigi Zoccolotti  Cristina Burani 《Scientific Studies of Reading》2013,17(5):333-349

This study examines the effects of orthographic neighborhood size (N-size) in relationship with word frequency on the reading aloud of children with and without dyslexia whose language has a consistent orthography. Participants included 22 Italian fourth-grade children with dyslexia and 44 age-matched typically developing readers. Children with dyslexia read low-frequency words with high N-size faster than words that had no neighbors; by contrast, typically developing readers showed no N-size effects, irrespective of word frequency. The facilitating effect of N-size on low-frequency word reading in children with dyslexia indicates that they benefit from lexical activation spreading from dense neighborhoods.  相似文献   

Foot strike patterns of recreational and sub-elite runners in a long-distance road race     

Peter Larson  Erin Higgins  Justin Kaminski  Tamara Decker  Janine Preble  Daniela Lyons 《Journal of sports sciences》2013,31(15):1665-1673

Abstract

Although the biomechanical properties of the various types of running foot strike (rearfoot, midfoot, and forefoot) have been studied extensively in the laboratory, only a few studies have attempted to quantify the frequency of running foot strike variants among runners in competitive road races. We classified the left and right foot strike patterns of 936 distance runners, most of whom would be considered of recreational or sub-elite ability, at the 10 km point of a half-marathon/marathon road race. We classified 88.9% of runners at the 10 km point as rearfoot strikers, 3.4% as midfoot strikers, 1.8% as forefoot strikers, and 5.9% of runners exhibited discrete foot strike asymmetry. Rearfoot striking was more common among our sample of mostly recreational distance runners than has been previously reported for samples of faster runners. We also compared foot strike patterns of 286 individual marathon runners between the 10 km and 32 km race locations and observed increased frequency of rearfoot striking at 32 km. A large percentage of runners switched from midfoot and forefoot foot strikes at 10 km to rearfoot strikes at 32 km. The frequency of discrete foot strike asymmetry declined from the 10 km to the 32 km location. Among marathon runners, we found no significant relationship between foot strike patterns and race times.  相似文献   

Morphological proportionality in elite age group North American divers     

Daniela Sovak  Michael R. Hawes  Kate Plant 《Journal of sports sciences》2013,31(5):451-465

Abstract

The purpose of this investigation was to describe the morphological parameters that characterize elite age group divers. Comparisons are made to normative age group data from the Coquitlam Growth Study and the constancy of important characteristics from age group to age group is examined. Data were collected on 27 male and 28 female elite divers who participated in the 1990 North American Age Group Diving Championships. Body build, body composition and skinfold corrected diameters were determined from 36 anthropometric parameters and analysed by ANOVA, t‐test and Phantom 2‐scores procedures. All age groups except the 14‐ to 15‐year‐old males were significantly (P ≤0.05) shorter than their norms but recorded higher androgyny index values. The estimated relative muscle mass increased significantly (P≤0.05) with age for males at all ages (40.8–46.3%). The 16‐ to 18‐year‐old females had a significantly (P<0.05) larger relative muscle component compared to the younger age groups (40.1–38.4%). When normalized for height, active tissue development of the extremities was comparable between the sexes except in the forearm. The results indicate that at all age levels short stature is an important characteristic for divers. Analysis of regional active tissue development provides further insight into sport‐specific prerequisites for success at elite levels.  相似文献   

Physical Fitness in Children With Developmental Coordination Disorder     

Nadja Schott  Verena Alof  Daniela Hultsch  Dagmar Meermann 《Research quarterly for exercise and sport》2013,84(5):438-450

The protective effects of physical activity and fitness on cardiovascular health have clearly been shown among normally developed children. However, data are currently lacking pertaining to children with developmental coordination disorder (DCD). The purpose of this study was to examine differences in fitness measures, body composition, and physical activity among children with and without DCD. A cross-sectional design was implemented examining 261 children (118 girls, 143 boys) ages 4–12 years (mean age 7.8 ± 1.9 years). Children were categorized as having DCD if they scored less than or equal to the 5th percentile (n = 71) or between the 6th and the 15th percentile (n = 52) on the Movement Assessment Battery for Children (MABC; Henderson & Sugden, 1992). The typically developing children had scores between the 16th and the 50th percentile (n = 106) or above the 50th percentile (n = 32) on the MABC. The age-related body mass index was used to characterize body composition. Physical fitness was assessed with a 6-min run, 20-m sprint, jump-and-reach test, medicine ball throw, curl-ups, and sit-and-reach test. Physical activity was estimated with a questionnaire. The percentage of overweight and obese children ages 10–12 years were significantly higher in the DCD groups (severe: 50%, moderate: 23.1%) than in the typically developing groups (medium: 5.6%, high: 0%; p < .05). Significant interactions (MABC x Age Group) were found for the fitness tests (p values < .05), except flexibility; whereby specifically, compared to the children in the typically developing groups children in the DCD groups ages 4–6 years achieved significantly worse results for the 20-m sprint, and children of the DCD groups ages 10–12 years achieved significantly worse results for the 6-min run, jump-and-reach test, and medicine ball throw. The study demonstrates poorer performance in fitness tests with high demands on coordination in children with DCD compared to their typically developing peers. Furthermore, the differences in fitness increased with age between children in the DCD groups versus the typically developing groups.  相似文献