Kilroy Was There: A GI's War in Photographs: Photos from the Collection of Frank Kessler     

Ray B. Browne 《Journal of American culture (Malden, Mass. : 2003)》2005,28(2):236-236

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Effects of light refraction on the accuracy of camera calibration and reconstruction in underwater motion analysis   总被引：1，自引：0，他引：1  

Kwon YH  Casebolt JB 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(2):315-340

One of the most serious obstacles to accurate quantification of the underwater motion of a swimmer's body is image deformation caused by refraction. Refraction occurs at the water-air interface plane (glass) owing to the density difference. Camera calibration-reconstruction algorithms commonly used in aquatic research do not have the capability to correct this refraction-induced nonlinear image deformation and produce large reconstruction errors. The aim of this paper is to provide a thorough review of: the nature of the refraction-induced image deformation and its behaviour in underwater object-space plane reconstruction; the intrinsic shortcomings of the Direct Linear Transformation (DLT) method in underwater motion analysis; experimental conditions that interact with refraction; and alternative algorithms and strategies that can be used to improve the calibration-reconstruction accuracy. Although it is impossible to remove the refraction error completely in conventional camera calibration-reconstruction methods, it is possible to improve the accuracy to some extent by manipulating experimental conditions or calibration frame characteristics. Alternative algorithms, such as the localized DLT and the double-plane method are also available for error reduction. The ultimate solution for the refraction problem is to develop underwater camera calibration and reconstruction algorithms that have the capability to correct refraction.  相似文献   

The Harriman Alaska Expedition Retraced: A Century of Change, 1899–2001     

Ray &#x;&#x;&#x;&#x;&#x;&#x;B. Browne 《Journal of American culture (Malden, Mass. : 2003)》2005,28(4):455-455

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Staffing intelligence services: a survivor's guide     

JOHN B. HEPWORTH 《Health information and libraries journal》1992,9(2):52-61

ADONIS—latest developments and its role in the changing publisher/library relationship     

HENK C. J. COMPIER  ROBERT M. CAMPBELL  B. V. ADONIS 《Health information and libraries journal》1992,9(1):3-13

Introducing computer literacy skills for physicians     

Collins B  Linton A  Merril J  Pomerantz K  Winthrop S 《Medical reference services quarterly》1992,11(4):1-9

Computers are integral to medical practice, education, and research. While medical students learn computer skills during their training, many practicing physicians do not have the same computer experience. To familiarize this group with the exciting developments in medical informatics, the Himmelfarb Health Sciences Library and Department of Computer Medicine at the George Washington University Medical Center organized a workshop "Introducing Your Office Computer!" for attending physicians. The workshop featured a short lecture/video presentation on computer applications in medicine followed by a "computer fair" of five computer applications. Eleven physicians attended the workshop. Feedback was very positive; many called later to request more detailed instructions on using the programs demonstrated. It was a valuable experience for the staff, and new bridges were built between departments and clients.  相似文献   

Understanding of number concepts in low attaining 7–9 year olds: Part I. Development of descriptive framework and diagnostic instrument     

B. Denvir  M. Brown 《Educational Studies in Mathematics》1986,17(1):15-36

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Ethics of information giving: the librarian's view*     

R. B. TABOR 《Health information and libraries journal》1985,2(3):105-107

Orientation and training of preclinical medical students in the use of the library*     

B. STRICKLAND-HODGE 《Health information and libraries journal》1987,4(4):238-243

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A suggested approach to a library building program     

B Barker  P Di Mauro 《Bulletin of the Medical Library Association》1967,55(3):329-335

The preliminary building program suggested in this paper makes use of outlines, graphs, charts, and lists, rather than long-winded paragraphs, to describe the needs, objectives, and philosophy of the library. It is hoped that a short, concise, but detailed, report using these methods will save time and make the report more attractive to read, thereby encouraging the many people who will need to assist in the building planning to use the report.  相似文献