Assessment of locations along the proposed HS2 Routes that are likely to experience ground vibration boom from high-speed trains

Ground vibration boom is a physical phenomenon associated with a dramatic increase in railway-generated ground vibrations that can occur when train speeds exceed the velocity of Rayleigh waves in the supporting ground. The present paper describes the results of the preliminary assessment of the proposed HS2 routes from the point of view of possible occurrence of ground vibration boom. The analysis is based on the available geological information about the soil composition along the proposed HS2 routes and on the expected train speeds, including areas of train acceleration and deceleration between railway terminals. Rayleigh wave velocities have been calculated for all sites along the routes using the geological data and compared with the expected train speeds at the relevant locations. Using this method, several sensitive locations have been identified where ground vibration boom is likely to occur. The expected levels of ground vibration boom for some sites have been estimated

Le design thinking sprint pour faciliter la réalisation de changements dans le processus de jumelage des résidents et au-delà

Implication Statement Enacting change in medical education requires effective facilitation processes. Medical education lags behind other fields in systems innovation and radically disruptive approaches to the challenges we encounter. Design thinking “sprints,” widely used in many other settings, serve as an opportunity to fill the gap as a facilitation process during periods requiring extensive and/or rapid change. Though resource-intensive, our experience using design thinking sprints for a situation requiring urgent change management with high-stakes implications for Canadian medical education to demonstrate their utility. A more widespread, adoption can contribute to innovation within all aspects of education including curriculum design, policy development, and educational process renewal.Énoncé des implications de la recherche La mise en œuvre de changements dans l’éducation médicale exige un processus de facilitation efficace. Comparée à d’autres disciplines, l’éducation médicale est à la traîne en ce qui concerne l’innovation des systèmes et l’adoption d’approches radicalement transformatrices en réponse aux défis rencontrés. Le design thinking sprint, approche largement utilisée dans de nombreux contextes, pourraient permettre de combler le manque de processus de facilitation lorsque des changements importants ou rapides sont à l’œuvre. Notre expérience de l’utilisation du design thinking sprint dans une situation nécessitant une gestion urgente de changements à enjeux importants pour l’éducation médicale canadienne démontre son utilité, malgré les ressources considérables qui ont dû être mobilisées. Une adoption plus large de cette approche peut contribuer à l’innovation dans tous les aspects de l’éducation, y compris la conception des programmes d’études, l’élaboration de politiques et le renouvellement des processus éducatifs

Post mortem studies of sea otters, Enhydra lutris L., in California

Dead sea otters found on or near beaches in central California from January 1968 through June 1974 were collected for study. Necropsies were conducted on many of these carcasses. Sea otter mortalities are related to: (1) area of recovery; (2) sex; (3) relative age; (4) general cause of death; and (5) sea surface roughness. Selected specific aspects of necropsies are summarized. Tables for estimating weight from total length and estimating total length from tail length and foot length are given. Organ weights are discussed. Criteria for establishing relative age based on degree of fusion of cranial sutures, eruption and wear of dentition, and development of the glenoid fossa are given. A method of estimating relative age of male otters is given based on baculum length or volume. Methods useful for sexing dissociated skeletal remains based on osteological differences in pelves are presented. (87pp.

Strength of Cold-Formed Steel Jamb Stud-To-Track Connections

The North American Standard for Cold-Formed Steel Framing - Wall Stud Design, AISI S211-07, provides a design expression for web crippling at the end reaction of the single stud-to-track connection. The subject of this report is an experimental investigation that was carried out at the University of Waterloo to establish a similar design expression for multiple jamb stud members. It is anticipated that the AISI Committee on Framing Standards will consider the results of this study in the development of future standards and the Cold-Formed Steel Engineers Institute in the development of design aids. The American Iron and Steel Institute and Steel Framing Alliance wish to express their appreciation to the researchers and project sponsors for this report