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Birthday Problem and Expected Values

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Teaching Statistics 1985年第1期7卷 21-24页

作者： TANIS, ELLIOT A. Hope College Holland Michigan United States

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New data base program for quality control of strabismus surgery

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Strabismus 1996年第3期4.0卷 127-132页

作者： Stärk, N. Stärk, P. Zubcov, A.A. University Eye Hospital Johann Wolfgang Goethe University Frankfurt/M. Department of Pediatric Ophthalmology Germany Technical University Darmstadt Germany University Eye Hospital Johann Wolfgang Goethe University Frankfurt/M. Department of Pediatric Ophthalmology 60590 Frankfurt/Main Theodor Stern Kai 7 Germany

The authors report on a newly developed data base program for strabismus patients. All relevant preoperative and postoperative information regarding visual sensory data, motility, squinting angle in nine fields of gaze and head position are easily entered into the data base. The program flows easily through data collection. Its use does not require special computer skills. Depending on monitor size, data for each patient is compressed into three or four screens totaling 120 entry fields, 67 of which refer to preoperative and postoperative squint angle. Entry fields flow in a logical manner, Storing capacity is increased by a factor of up to 40 with 28 drop down fields, totaling 271 available entry fields per patient. To enhance easy access of data, no abbreviations have been used.

关键词： computer program Data base program Strabismus surgery

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On Approximations to the Inverse Student’s-t Distribution Function

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Journal of Statistical Computation and Simulation 1978年第3-4期7卷 167-180页

作者： Chen, Hubert J. Statistics Department University of Georgia Athens 30602 United States

The inverse of the Student's t-distribution is often needed in computer simulation and applied statistics, e.g, in generating random variates from t-distributions and in computing tables needed for statistical procedures which do not assume known variances. The tdistribution algorithm of Dudewicz and Dalal (1972) can be used to approximate the inverset distribution function. The author notes an algorithm for evaluation of this inverse d.f. which can be implemented in a fast, accurate and short computer program. The error analysis is also reported. An application is considered for the problem of testing the hypothesis that a sequence of random variates follows Student's-t distribution. © 1978, Taylor & Francis Group, LLC. All rights reserved.

关键词： algorithm computer program FORTRAN interval estimation Inverse Student's-t distribution function t-distribution

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Optimization of the Chronic Kidney Disease-Peritoneal Dialysis App to Improve Care for Patients on Peritoneal Dialysis in Northeast Thailand: User-Centered Design Study

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JMIR FORMATIVE RESEARCH 2022年第7期6卷 e37291页

作者： Lukkanalikitkul, Eakalak Kongpetch, Sawinee Chotmongkol, Wijittra Morley, Michael G. Anutrakulchai, Sirirat Srichan, Chavis Thinkhamrop, Bandit Chunghom, Theenatchar Wiangnon, Pongsai Thinkhamrop, Wilaiphorn Morley, Katharine E. Khon Kaen Univ Srinagarind Hosp Fac Med Ctr Excellence Kidney Dis Khon Kaen Thailand Harvard Med Sch Ophthalm Consultants Boston Boston MA 02115 USA Khon Kaen Univ Fac Med Div Nephrol Khon Kaen Thailand Khon Kaen Univ Fac Engn Dept Comp Engn Khon Kaen Thailand Khon Kaen Univ Fac Publ Hlth Data Management & Stat Anal Ctr Khon Kaen Thailand Khon Kaen Univ Srinagarind Hosp Fac Med Kidney Unit Khon Kaen Thailand Harvard Med Sch Massachusetts Gen Hosp Ctr Global Hlth 125 Nashua StSuite 722 Boston MA 02114 USA

Background: The prevalence of peritoneal dialysis (PD) in Thailand is increasing rapidly in part because of Thailand's Peritoneal Dialysis First policy. PD is a home-based renal replacement therapy in which patients with chronic kidney disease perform up to 4 exchanges of dialysate fluid per day in the peritoneal cavity. Overhydration is one of the most common complications in patients on PD and is associated with increased morbidity and mortality. To monitor hydration status, patients collect hydration metrics, including body weight, blood pressure, urine output, and ultrafiltration volume, from each dialysis cycle and enter this information into a PD logbook. This information is reviewed bimonthly at PD clinic appointments. The chronic kidney disease-PD (CKD-PD) app with near-field communication (NFC) and optical character recognition (OCR) was developed to automate hydration metric collection. The information was displayed in the app for self-monitoring and uploaded to a database for real-time monitoring by the PD clinic staff. Early detection and treatment of overhydration could potentially reduce the morbidity and mortality related to overhydration. Objective: This study aims to identify usability issues and technology adoption barriers for the CKD-PD app with NFC and OCR and a monitoring system and to use this information to make rapid cycle improvements. Methods: A multidisciplinary team of nephrologists, PD clinic nurses, computer programmers, and engineers trained and observed 2 groups of 5 participants in the use of the CKD-PD app with NFC and OCR and a monitoring system. The participants were observed using technology in their homes in 3 phases. The data collected included the Unified Theory of Acceptance and Use of Technology questionnaire, think-aloud observation, user ratings, completion of hydration metrics, and upload of hydration metrics to the central database. These results were used by the team between phases to improve the functionality and usef

关键词： peritoneal dialysis peritoneum mobile health mHealth rapid cycle process improvement methodology home monitoring near-field communication monitor kidney rapid cycle improvement quality improvement process improvement methodology nephrology nephrologist internal medicine computer program Unified Theory of Acceptance and Use of Technology UTAUT usability interface metric capture barrier renal mobile phone

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Computational technique for the application of the Hilbert transform to frequency domain electrical impedance data

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Exploration Geophysics 1988年第3期19卷 457-462页

作者： Jaggar, S.R. Fell, P.A. Petrophysics Laboratory Geocomputing Laboratory Department of Geology and Geophysics University of Sydney NSW 2006 Australia

A microcomputer program is described that uses the Hilbert transform to transform real data to imaginary and vice-versa in the frequency domain. This is achieved via specific integrals embodied in the Kramers-Kronig relationships. Cubic splines are applied to the measured data to interpolate 100 points per logarithmic decade. The Hilbert transform is computed at each frequency by applying the finite difference form of the algorithm over each logarithmic decade and then summing results for all decades. Two estimates of error are provided. One is a measure of the percentage error for each generated point relative to the measured data;the second is the chi-squared parameter. © ASEG 1988.

关键词： computer program Hilbert transform Imaginary Real

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Analysis of the effectiveness of ActivLife training in people over 60 years of age: A pilot study

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Gerontechnology 2017年第3期16卷 189-195页

作者： Les, Anna Niedzielska, Ewa Piotrowska, Joanna Staniszewski, Michal Kozak, Dominika Józef Pilsudski University of Physical Education in Warsaw Faculty of Tourism and Recreation Department of Recreation Division of Theory of Recreation Warsaw Poland Józef Pilsudski University of Physical Education in Warsaw Faculty of Tourism and Recreation Department of Recreation Division of Metodics of Recreation Warsaw Poland Józef Pilsudski University of Physical Education in Warsaw Faculty of Physical Education Department of Sports Division of Water and Winter Sports Warsaw Poland Alreh Medical Warsaw Poland

Background One of the most important geriatric problems which increases the risk of injury and disability is falling. The consequences involve fractures of the hips and femoral neck, leading to restrictions in mobility, independence and the quality of life. Reduction of the risk is the main challenge of modern geriatrics. Aim The aim of the study was to analyze the effectiveness of training using the ActivLife system in women over 60 years of age who have declared difficulties in maintaining the balance of the body. Method The study covered a group of 14 women over 60 years of age. The experimental group participated in a 4-week program with the use of the ActivLife system and the author's exercise program providing assistance in maintaining balance. The Fullerton Functional Fitness Test as well as measurements on a baropodometric platform were applied to assess the effectiveness of the activities. Results In the experimental group, a positive correlation (r=0.769) was observed between the results of attempting to perform the 'Two minute step test' and the 'Chair Stand' (r=0.850 in the control group). In addition, the studied group experienced a significantly negative correlation (r=-0.838) between the results of attempting to perform the 'Up-and-Go' and the 'chair Stand' (the control group presented a negative correlation of r= -0.856). In the selected attempts related to fitness and balance, dependencies between different parameters can be observed.

关键词： Balance computer program Fall Physical activity Seniors

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CUBIC: A three‐dimensional colored projection of consort 30 generated trivariate flow cytometric data

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Cytometry 1991年第6期12卷 570-575页

作者： Greimers, Roland Rongy, Anne Michel Schaaf‐Lafontaine, Nicole Boniver, Jacques Laboratory of Pathologic Anatomy University Hospital of Liege Liege B4000 B35 Belgium

The CUBIC program displays three‐dimensional colored dot plots of flow cytometric trivariate data collected by unmodified commercial instruments (FACScan flow cytometer, FACS 440 cell sorter). Assuming a bimodal distribution of the fluorescence intensity of the cells, the eight theorical subpopulations involved in a three‐color fluorescence histogram are clearly localized in the 3‐D space by colored dots that are clustered near each corner of a cubic frame. Rotation, tilting, and zoom functions are available. Table look‐up is not needed. CUBIC was illustrated by two experiments: 1) three‐color immunofluorescence of antigens on human lymphocytes using monoclonal antibodies conjugated either to fluorescein (FITC), to R‐phycoerythrin (PE), or to biotin revealed by a streptavidin coupled to a PE‐Texas red tandem conjugate (TC);2) two‐color immunofluorescence of CD4 and CD8 antigens on thymocytes of healthy or preleukemic mice correlated to the DNA content quantified by 7‐amino‐actinomycin D (7‐AAD). The three fluorescences were excited by a single argon‐ion laser emitting at 488 nm. Copyright © 1991 Wiley‐Liss, Inc.

关键词： 7‐amino‐actinomycin D computer program data display energy transfer human lymphocytes mouse leukemia phycoerythrin‐Texas red tandem conjugate Three‐color analysis

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Mapping DNA by stochastic relaxation: Schedule for optimal annealing

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Mitochondrial DNA 1991年第4期1卷 221-226页

作者： Grigorjev, A.V. Mironov, A.A. Department of Biotechnology Institute for Genetics of Microorganisms USSR Moscow 113545 1-st Dorozhny pr. 1 Russian Federation

The analysis of the various cooling schedules for the simulated annealing algorithm is made towards the restriction map construction. Algorithm behaviour under control of three different cost functions is considered and the discrete cost function is found to handle successfully experimental data with realistic error sizes. A program using this function has been derived from the algorithm to construct linear and circular DNA maps. © 1991 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.

关键词： computer program DNA mapping Simulated annealing

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MODEL COMPUTATION OF THE EFFECT OF ARBITRARY VARIATIONS IN AQUEOUS INFLOW, OUTFLOW CONDUCTANCE, OCULAR RIGIDITY AND EPISCLERAL VEIN PRESSURE ON OCULAR PRESSURE

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Acta Ophthalmologica 1977年第5期55卷 761-770页

作者： NISSEN, OLE I. Department of Ophthalmology Rigshospitalet Copenhagen Denmark Institute of Medical Physiology B University of Copenhagen Denmark

Model calculations of the time course of the intraocular pressure are performed in cases where the four determinants mentioned in the title vary, singly or simultaneously, according to specified time functions. Assumptions are 1) that the outflow of the aqueous humour is proportional to the driving pressure, and 2) that the intraocular pressure and volume are related to each other as described by Friedenwald. The mathematical solution is numerical and involves the repetition of the same calculatory step process. It is rendered probable that the maximal inhibitory effect of acetazolamide on the secretion of aqueous humour is reached in less than one minute after the drug has reached the receptors. A programmable calculator with 224 storage locations is used, the programs are given.— 1977 Institution Acta Ophthalmologica Scandinavica

关键词： acetazolamide aqueous secretion computer program conductance (facility) of aqueous outflow episcleral vein pressure Friedenwald's law intraocular pressure mathematical model ocular rigidity

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How adults with acquired brain damage perceive computer training as a rehabilitation tool: A focus-group study

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Scandinavian Journal of Occupational Therapy 2002年第3期9卷 119-129页

作者： Eriksson, Marianne Dahlin-Ivanoff, Synneve Sahlgrenska University Hospital Department of Occupational Therapy SE-431 80 Mölndal Sweden

The aim of this study was to explore and describe how adult outpatients with acquired brain damage and referred to occupational therapy perceive computer training with the RehaCom programs, in order to evaluate the method of treatment as a tool in the rehabilitation of persons with cognitive disorders. By using focus-group discussions as a qualitative method of research when analysing the result, five themes with corresponding categories emerged, describing a development of understanding and learning about capacities. Themes describing how the participants could apply strategies to overcome shortcomings in daily occupations and the therapeutic role of the occupational therapist were identified as well. The result shows that a computer training program such as RehaCom can be used as an educational tool, for example, to guide a person who is trying to adopt compensatory strategies to avoid overload by taking pauses. It was found that anything the participants learned was also applicable to occupational performance in daily life.

关键词： Astheno-emotional disorders Awareness Cognition disorders Compensatory strategies computer program Learning capacities Occupational therapy RehaCom

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