An Annular Plate Model in Arbitrary-Lagrangian-Eulerian Description for the DLR FlexibleBodies Library

The bending deformation of rotating annular plates and the associated vibration behaviour is important in engineering applications which range from automotive or railway brake systems to discs that form essential components in turbomachinery. In order to extend the capabilities of the DLR FlexibleBodies library for such use cases, a new Modelica class has been implemented which is based on the analytical description of an annular Kirchhoff plate. In addition the so-called Arbitray Langrangian-Eulerian (ALE) representation has been adopted so that rotating and non-rotating external loads may be applied conventiently to rotating plates. Besides these particularities the new class AnnularPlate completely corresponds to the concept of FlexibleBodies library with the two already available model classes Beam and ModalBody. This paper gives an overview on the theoretical background of the new class AnnularPlate, explains the usage and presents application examples

Description of a new kinosternid from Yucatan

http://deepblue.lib.umich.edu/bitstream/2027.42/56716/1/OP277.pd

A SITUATION ANALYSIS OF HOSPITALISED PHYSICALLY ABUSED PRE-SCHOOL CHILDREN IN SOUTH AFRICA: CONTRIBUTING SOCIAL FACTORS

The experience of physical abuse is a traumatic event, which is so intense and frightening that it overwhelms the child’s ability to cope with his/her normal developmental tasks. The goal of the study was to expand social worker’s knowledge of the social circumstances of physically abused preschool children who are hospitalised, and to offer guidelines for professionals from a variety of disciplines to identify and assess physical abuse. To obtain the goals, the objectives were threefold: first to present demographic data on children with intentional physical injuries and their families; second, to describe the experiences of the perpetrators and circumstances under which the abuse took place; and third, to determine how social workers assess children who are suspected of having been physically abused. The study was conducted at the Red Cross Children’s Hospital in Cape Town, South Africa. Both qualitative and quantitative methods were applied. The diagnoses reported were drawn from a sample of preschool aged children presenting with intentional physical injuries at the hospital over a four month period, interviews with four perpetrators using set guidelines, and conducting a survey with four of the social workers employed at the hospital using a self-completion questionnaire. The findings offered demographic details of the abused children and confirmed that children under the age of six were the most vulnerable age group to be subjected to physical abuse. Head injuries and gunshot wounds were the most frequent occurring physical injuries in this sample, indicating gang activities, effects of poverty and substance misuse. Four case studies are presented following the interviews with the perpetrators/parents, which give a situation analysis of these social circumstances under which the abuse took place. The social circumstances under which the physical abuse took place, and criteria used for assessment can be used as a framework for professionals rendering services to childre

A contribution to the herpetology of the Isthmus of Tehuantepec, IV

http://deepblue.lib.umich.edu/bitstream/2027.42/56292/1/MP047.pd

A contribution to the herpetology of the Isthmus of Tehuantepec, I: The Scelopori of the Pacific slope

http://deepblue.lib.umich.edu/bitstream/2027.42/56795/1/OP356.pd

Notes on a collection of amphibians and reptiles from eastern Nicaragua

http://deepblue.lib.umich.edu/bitstream/2027.42/56796/1/OP357.pd

Ugi multicomponent reaction to prepare peptide–peptoid hybrid structures with diverse chemical functionalities

Monodisperse sequenced peptides and peptoids present unique nano-structures based on their self-assembled secondary and tertiary structures. However, the generation of peptide and peptoid hybrid oligomers in a sequence-defined manner via Ugi multicomponent reaction has not yet been studied. Herein, we report a synthetic strategy that enables both the modification of peptides as well as the generation of sequence-defined peptide–peptoid hybrid structures. Our synthetic methodology rests on the fusion of solid phase peptide synthesis with Ugi multicomponent reactions. We evidence that a diversity of chemical functionalities can be inserted into peptides or used in the design of peptide–peptoid hybrids exploiting a wide functional array including amines, carboxylic acids, hydrocarbons, carbohydrates as well as polymers, introducing a sequence-defined synthetic platform technology for precision peptoid hybrids