Shock testing of a nitrogen tank (Cryo diffusion type 220 VLR) on the middle weight shock stand

Results of vertical and horizontal shock tests on type 200 VLR nitrogen tank are given

Relative motion at the bone-prosthesis interface

Bone ingrowth in porous surfaces of human joint implants is a desired condition for long-term fixation in patients who are physically active (such as in sport or work). It is generally recognized that little actual bone ingrowth occurs. The best clinical results report between 10 and 20% of the total prosthetic surface in contact with bone will feature good bone ingrowth. One inhibiting factor is the relative motion of the bone with respect to the implant during load-bearing. This study investigated mathematically the interface micromotion (transverse reversible relative motion) between a flat metal tibial prosthetic surface of a prototype implant, and the bone at the resection site. The aim was to assess the effect of perimeter fixation versus midcondylar pin fixation and the effect of plate thickness and plate stiffness.\ud \ud Results showed that in the prototype design the largest reversible relative bone motion occurred at the tibial eminence. By design, the skirt fixation at the perimeter would prevent bone motion. A PCA (Howmedica Inc.) prosthesis has been widely used clinically and was chosen for a control because its fixation by two pegs beneath the condyles is a common variation on the general design of a relatively thick and stiff metal tibial support tray with pegs in each condylar area. The PCA tibial prosthesis showed the largest bone motion at the perimeter along the midcondylar mediolateral line, while being zero at the pegs. Maximum relative bone motion for the prototype was 37 ¿m and for the control was 101 ¿m. Averaged values showed the prototype to have 38% of the relative reversible bone motion of the control (PCA)

Introductory Note

Introduction to Journal of New Zealand Studies 2002 No.

The Braided River: Migration and the personal essay

One of my earliest memories is sitting at the table in our rented house in Masterton with Dad and my brothers and hearing our mother crying in the loo. It was an unusual and frightening sound which is why I remember it vividly 67 years later – also Dad had cooked dinner which wasn’t his forte

Mining Historical Advertisements in Digitised Newspapers

Historians have turned their focus to newspaper articles as a proxy of public discourse, while advertisements remain an understudied source of digitized information. This paper shows how historians can use computational methods to work with extensive collections of advertisements. Firstly, this chapter analyzes metadata to better understand the different types of advertisements, which come in a wide range of shapes and sizes. Information on the size and position of advertisements can be used to construct particular subsets of advertisements. Secondly, this chapter describes how textual information can be extracted from historical advertisements, which can subsequently be used for a historical analysis of trends and particularities. For this purpose, we present a case study based on cigarette advertisements

Romance of the Rail

James Cowan wrote promotional literature and guidebooks for the New Zealand Railways Department. In them he mixes historical and progressivist discourse, revealing tensions between contradictory ideas about New Zealand: its celebration as a modern and technologically advanced state, epitomized by the railway, and nostalgia for the culture and history that the railway aimed to erase