Intricate partial waves in nuclear scattering

AbstractThis article is meant as an encomium of the life-span endeavor of Jacques Raynal to relate nuclear scattering density matrices with numerical methods. The mathematical investigations he made involved intricate hypergeometric coupling algebras and transformations. He was among the first to appreciate the general importance of these studies. His efforts over 60 years are most praiseworthy and, for them, Jacques has gained much respect.

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The Research of Axial Deflection and Generatrix of Metal Belt CVT

Volume 10: Mechanical Systems and Control, Parts A and B ◽

10.1115/imece2009-10113 ◽

2009 ◽

Cited By ~ 1

Author(s):

Wu Zhang ◽

Kai Liu ◽

Chun-Guo Zhou ◽

Yi-Duo Wei ◽

Ning-Qiang Wu

Keyword(s):

Numerical Methods ◽

Life Span ◽

Continuously Variable Transmission ◽

The State ◽

Design Parameters ◽

Actual Situation ◽

Contact Strength ◽

Working Process ◽

Calculating Method ◽

Variable Transmission

To reduce the metal belt’s axial deflection of the metal belt continuously variable transmission (CVT) during the working process, the value of the axial deflection has been calculated by using numerical methods. The precision of two methods to calculate the deflection has been compared. A calculating method closer to the actual situation has been attained. According to the principle of conjugate curves, and with the involute generatrix of the metal belt as example, a solution to the generatrix of the pulley conjugated with it is obtained, and the relation between the pullys generatrix curvature and the pulleys generatrix contact strength is achieved. By changing the metal belt value of the design parameters, the state subject to force between the pulley and the metal belt can be improved. So as to ensure the whole metal belt level transmit in the process of speed changes. Theoretically, the axial deflection can be eliminated completely, and the life span of the metal belt and the reliability of the transmission, as well as the performance of the metal belt CVT can be greatly improved, so as to provide the references for the CVT design.

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Modeling Mortality in Poland by Means of Multi-Parameter Mortality Laws for Whole Life Span

Przegląd Statystyczny ◽

10.5604/01.3001.0014.0766 ◽

2017 ◽

Vol 64 (1) ◽

pp. 95-120

Author(s):

Waldemar Florczak ◽

Arkadiusz Florczak

Keyword(s):

Numerical Methods ◽

Life Span ◽

Quantitative Methods ◽

Objective Functions ◽

Modeling And Forecasting ◽

Demographic Processes ◽

Males And Females ◽

Mortality Analysis

In view of the contemporary changes in socio-economic processes implied by demographic conditions, it seems advisable to disseminate and deepen quantitative methods of modeling and forecasting demographic processes. This article deals with mortality analysis in Poland, of both males and females, in the years 1990–2015 by means of mortality laws covering the whole life span. Six models were investigated: 8-parameter Heligman-Pollard model, 9-parameter Heligman-Pollard model, Kostaki model, multixponential model, and finally 8- and 11-parameter Carriere models. The parameters of the models were estimated in R environment using numerical methods minimizing four different objective functions. The outcomes show that in the period under consideration some changes in the mortality patterns occurred. Now it is the 9-parameter Heligman-Pollard model for males and the 8-parameter Carriere model for females that seem best suited to model mortality in Poland.

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Mathematical models for determination of the residual stresses on gears

The Journal of Strain Analysis for Engineering Design ◽

10.1243/030932403770735890 ◽

2003 ◽

Vol 38 (6) ◽

pp. 529-538 ◽

Cited By ~ 1

Author(s):

B Aberšek ◽

J Flasšker ◽

J Balicč

Keyword(s):

Experimental Data ◽

Numerical Methods ◽

Residual Stresses ◽

Mathematical Models ◽

Life Span ◽

Experimental Methods ◽

Years Of Experience

This paper deals with the influence of residual stresses on the total value of loading and describes a method for measuring and calculating residual stresses and the total value of loading in the example of a gear. Since experimental methods are slow and expensive and are almost impossible to be carried out in the phase of product designing, on the basis of experiments and years of experience, various semi-numerical methods to determine residual stresses have been developed. The significance of the suggested methods is that in the calculations residual stresses can be taken into account even if there is no relevant experimental data. Thus the accuracy can be increased as, for example, in determining the life span of project products.

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Continuum of Care Following Sports-Related Concussion

American Journal of Speech-Language Pathology ◽

10.1044/2020_ajslp-19-00131 ◽

2020 ◽

Vol 29 (3) ◽

pp. 1389-1403

Author(s):

Jessica Brown ◽

Kelly Knollman-Porter

Keyword(s):

Young Adults ◽

Life Span ◽

Sports Injuries ◽

Continuum Of Care ◽

Medical Professional ◽

Structured Interviews ◽

Youth Athletes ◽

Speech Language Pathologist ◽

History Of ◽

Injury Reporting

Purpose Although guidelines have changed regarding federally mandated concussion practices since their inception, little is known regarding the implementation of such guidelines and the resultant continuum of care for youth athletes participating in recreational or organized sports who incur concussions. Furthermore, data regarding the role of speech-language pathologists in the historic postconcussion care are lacking. Therefore, the purpose of this retrospective study was to investigate the experiences of young adults with history of sports-related concussion as it related to injury reporting and received follow-up care. Method Participants included 13 young adults with history of at least one sports-related concussion across their life span. We implemented a mixed-methods design to collect both quantitative and qualitative information through structured interviews. Participants reported experiencing 42 concussions across the life span—26 subsequent to sports injuries. Results Twenty-three concussions were reported to a parent or medical professional, 14 resulted in a formal diagnosis, and participants received initial medical care for only 10 of the incidents and treatment or services on only two occasions. Participants reported concussions to an athletic trainer least frequently and to parents most frequently. Participants commented that previous experience with concussion reduced the need for seeking treatment or that they were unaware treatments or supports existed postconcussion. Only one concussion incident resulted in the care from a speech-language pathologist. Conclusion The results of the study reported herein shed light on the fidelity of sports-related concussion care management across time. Subsequently, we suggest guidelines related to continuum of care from injury to individualized therapy.

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