Media Research Center

About: Media Research Center is a based out in . It is known for research contribution in the topics: Collaborative learning & Educational technology. The organization has 491 authors who have published 950 publications receiving 28581 citations. The organization is also known as: MRC.

Vertical viewing angle enhancement for the 360 degree integral-floating display using an anamorphic optic system

Abstract: We propose a 360 degree integral-floating display with an enhanced vertical viewing angle. The system projects two-dimensional elemental image arrays via a high-speed digital micromirror device projector and reconstructs them into 3D perspectives with a lens array. Double floating lenses relate initial 3D perspectives to the center of a vertically curved convex mirror. The anamorphic optic system tailors the initial 3D perspectives horizontally and vertically disperse light rays more widely. By the proposed method, the entire 3D image provides both monocular and binocular depth cues, a full-parallax demonstration with high-angular ray density and an enhanced vertical viewing angle.

Adaptively shortened pull down menus: location knowledge and selection efficiency

Abstract: Adaptively shortened pull down menus, as introduced by Microsoft with the 'personalized menus' in Office 2000™ and assumed to speed up menu selection, are examined Displacement of items in this adaptively changing menu is argued to conflict with the user's location knowledge, leading to increased selection times and error rates In a controlled experiment with 31 subjects, a standard menu was compared with a shortened and a gapped menu variant The gapped menu variant served to distinguish effects from displacement and effects resulting from reduced item number Selection times and error rates were smaller for the standard menu than for the shortened variant The gapped menu, whilst it has longer distances, was faster than the shortened menu, but slower than the standard menu According to our findings, the assumption that adaptively shortened pull down menus facilitate menu selection is weakened

The improvement of student teachers’ instructional quality during a 15-week field experience: a latent multimethod change analysis

Abstract: Most studies evaluating the effectiveness of school internships have relied on self-assessments that are prone to self-presentational distortions. Therefore, the present study analyzed the improvement in the instructional quality of 102 student teachers (46 women) from a German university during a 15-week internship at a local secondary school across three rating sources: the student teachers themselves, their students, and their mentors (experienced teachers). A latent multimethod change analysis identified a significant increase in instructional quality during the practice semester. However, ratings from the three informant groups only marginally converged.

Otitis media and congenital perilymphatic fistula as a cause of sensorineural hearing loss in children.

Abstract: In all infants and children who have progressive, fluctuating or sudden sensorineural hearing loss, the possibility of a congenital perilymphatic fistula should be considered. Factors determined to be highly suggestive of the presence of a congenital perilymphatic fistula as the cause of sensorineural hearing loss or vertigo, or both, include the following: mixed conductive and sensorineural hearing loss; antecedent sudden physical exertion or barotrauma; congenital deformities of the external ear and head; and abnormal findings on computed tomograms of the temporal bone, especially Mondini-like ear dysplasias. In a series of 37 children who had a congenital perilymphatic fistula treated at the Children's Hospital of Pittsburgh, 28 (76%) had had documented otitis media in the past or a history of middle ear disease. This finding should alert the clinician to the possibility of the presence of a congenital perilymphatic fistula when sensorineural hearing loss develops or progresses during an episode of otitis media. Perilymphatic fistula is caused by either congenital ossicular deformities or abnormalities of the labyrinthine windows or coexistence of both conditions. The likelihood of there being no further deterioration in hearing after surgical repair of a perilymphatic fistula is high. Every infant and child with unexplained hearing loss or disequilibrium or both deserves an attempt to uncover the cause at the earliest possible age.