Fractures of the Head of the Radius with Medial Displacement

A CAJM article on bone fractures.It is now well recognised that fractures of the head of the radius are not trivial injuries, but are due to the elbow joint being subjected to a considerable degree of violence. The injury usually occurs when the patient falls on to the outstretched hand and the head of the radius is driven violently against the capitellum, which acts rather like a blunt chisel and either impacts the radial head or else splinters off a portion of it. The capitellum itself often suffers a considerable degree of damage to its articular cartilage, although this does not usually show on routine X-rays. Unless the crack in the head of the radius is of a very trivial nature, operation should be advised in order to excise the radial head. This should not be delayed for more than a few days, and I have found that the best results are obtained if the operation can be performed within a few hours of the injury. Attempts have been made to replace the radial head with plastic or metal inserts, but I do not consider that this procedure is' advisable and that experimental surgery of this nature should be left to large clinics, where the problem can be properly evaluated

Welcome to Portland; Now Let’s Eat

This case study describes how nationally-acclaimed chefs and restaurants and the farm-to-table movement have led to Portland, Maine becoming a major culinary tourism destination

Osteo-chondritis of the lumbar spine

A journal article on Osteo-chondritis of the lumbar spine.Osteo-chondritis of the thoracic spine is a fairly well recognized condition; often referred to as Scheuermann’s disease (adolescent kyphosis, vertebral epiphysitis). There is, however, a variety of this condition affecting the lumbar spine, described by Wiles 11949) and Haffner (1952). The importance of the condition is that it usually occurs in children between the ages of 12 and 17 years and may be mistaken for a more serious condition such as tuberculosis of the spine. The patient is usually a healthy boy who suddenly starts to complain of a lumbar backache. Quite often this may start after an athletic injury, or misguided attempts at toe touching with the knees extended in a child with tight hamstring muscles

Paradise Lost? Impact of Tourism and Public Use on the Mnemba House Reef

With the increasing popularity and promotion of marine park tourism, coral reef ecosystems may be subject to stresses beyond their sustainable thresholds. Mnemba Island’s house reef was surveyed to assess impacts of public use and efficacy of current protection measures. The study was conducted with objectives of characterizing physical damage and providing a holistic overview of reef conditions. To obtain relative impact profiles in the area, line transects were carried out in two different zones - one more frequented by private island guests and one more frequented by boat tour operators. Benthic coral cover and damage, biological indicators (fish populations and sea urchin abundance), and proximal human activity were documented over a two-week period. While instances of tissue damage were comparable at both sites, it was found that the boat-side had a significant amount of unhealthier, bleached, and dead coral as well as rubble and algal growth. More anchor breakage and sediment damage were also observed on the boat-side. All these factors indicate that overall health on the boat-side is compromised, and suggests that coral in that section are more vulnerable and less resilient as a result of higher human activity. The findings demonstrate negative impacts of human activity on coral status, and demand immediate further action in protecting the reef as a whole. Recommendations were made for future monitoring and management in an effort to balance human usage without causing permanent environmental degradation

A two-dimensional hexagonal network model of alveolar mechanics

Pulmonary micromechanics (at the scale of alveoli) involves a delicate balance among tissue material properties, geometry, surface tension, pressure and stress distribution. To date, there is not a consensus among alveolar mechanics researchers about how these factors interact, in part because alveoli are so difficult to image and study in vivo. Here, we propose a basic mathematical model of a two-dimensional hexagonal network of mechanically coupled alveoli. We investigate equilibrium configurations of both dry and wet, internally pressurized elastic networks. Specifically, we compute pressure-area curves to quantify the differences among networks with different spring constants, internal pressures, network size and surface tensions. We conclude that a two-dimensional hexagonal network in force equilibrium is an appropriate first step in modeling the mechanics of the dynamic lung

A central sound system, an educational device to aid teachers and administrators.

Thesis (M.A.)--Boston University This item was digitized by the Internet Archive

The Ever Widening Scope of Fact Review in Federal Appellate Courts—Is the “Clearly Erroneous Rule” Being Avoided?

The expansion that has occurred in the federal courts is of principal concern to this writer

Military Base Off-Taker Opportunities for Tribal Renewable Energy Projects

This white paper surveys DOD installations that could have an increased potential interest in the purchase of energy from renewable energy projects on tribal lands. Identification of likely purchasers of renewable energy is a first step in the energy project development process, and this paper aims to identify likely electricity customers that tribal commercial-scale projects could serve. This white paper builds on a geospatial analysis completed in November 2012 identifying 53 reservations within 10 miles of military bases (DOE 2012). This analysis builds on those findings by further refining the list of potential opportunity sites to 15 reservations (Table ES-1), based on five additional factors: 1) The potential renewable resources required to meet the installation energy loads; 2) Proximity to transmission lines; 3) Military installation energy demand; 4) State electricity prices; 5) Local policy and regulatory environment

Catalyst for the Evolution of Hydrogen from Borohydride Solution

Organic pigments are capable of catalyzing the decomposition reaction of hydrogen-rich, stabilized, borohydride solutions to generate hydrogen gas on-board an operable hydrogen-consuming device such as a motor vehicle or other combustion engine. The organic pigments are used in hydrogen generating systems and in methods for controlling the generation of hydrogen gas from metal hydride solutions