Farm practices and their effects on farm earnings

Includes bibliographical references

The use of observational process recording to identify children's initial reactions to hospitalization

Thesis (M.S.)--Boston Universit

Ultrasonic Blood Flow Meter with Doppler Velocimetry

B.A. (Bachelor of Arts

Learning Recursive Functions From Approximations

This article investigates algorithmic learning, in the limit, of correct programs for recursive functionsffrom both input/output examples offand several interesting varieties ofapproximateadditional (algorithmic) information aboutf. Specifically considered, as such approximate additional information aboutf, are Rose\u27s frequency computations forfand several natural generalizations from the literature, each generalization involving programs for restricted trees of recursive functions which havefas a branch. Considered as the types of trees are those with bounded variation, bounded width, and bounded rank. For the case of learning final correct programs for recursive functions, EX-learning, where the additional information involves frequency computations, an insightful and interestingly complex combinatorial characterization of learning power is presented as a function of the frequency parameters. For EX-learning (as well as for BC-learning, where a finalsequenceof correct programs is learned), for the cases of providing the types of additional information considered in this paper, the maximal probability is determined such that the entire class of recursive functions is learnable with that probability

Novel rheumatoid arthritis susceptibility locus at 22q12 identified in an extended UK genome-wide association study

© 2014 The Authors. Arthritis & Rheumatology is published by Wiley Periodicals, Inc. on behalf of the American College of Rheumatology.Peer reviewedPublisher PD

SAMMIE computer aided ergonomics

Human modelling systems can be powerful tools for the design team as they enable predictions to be made of the percentage of future users of the product who may have problems with clearances, reaching, seeing or the combination of all these requirements may force unnatural and damaging postures. When problems are identified, it is possible for all of the design team to scrutinise the data and the assumptions used. The ergonomics problems with a proposed design can be presented visually thereby supporting efficient communication within the design team and solution-orientated action. SAMMIE (System for Aiding Man Machine Interaction Evaluation) is a human modelling computer aided ergonomics design system that was conceived in the late 1960s and by 1978 the system was being used on a daily basis as a consultancy tool. This paper will describe and discuss some of the more important issues that we have had to deal with during the development and application of SAMMIE

Recent applications of the SAMMIE system

Human modelling systems such as SAMMIE can be powerful tools for the design team as they enable predictions to be made concerning problems with clearances, reaching, seeing or the combination of all these requirements that may force unnatural and damaging postures. The potential benefits arising from the use of such systems are discussed below, with reference to some recent projects completed by SAMMIE CAD Ltd

Quantum Bound States with Zero Binding Energy

After reviewing the general properties of zero-energy quantum states, we give the explicit solutions of the \seq with $E=0$ for the class of potentials $V=-|\gamma|/r^{\nu}$, where $-\infty 2$, these solutions are normalizable and correspond to bound states, if the angular momentum quantum number $l>0$. [These states are normalizable, even for $l=0$, if we increase the space dimension, $D$, beyond 4; i.e. for $D>4$.] For $\nu <-2$ the above solutions, although unbound, are normalizable. This is true even though the corresponding potentials are repulsive for all $r$. We discuss the physics of these unusual effects.Comment: 11 pages, 4 figures which can be generated from Mathematica commands given at the end of the file. Latex, REVISED--Fig. 4 Mathematica command improved and correcte

The design of supermarket workstations to reduce the incidence of musculo-skeletal discomfort

Statistics provided by the Department of Social Security in Great Britain show that the number of days of certified incapacity because of musculo-skeletal diseases rose from 34.2 million days in 1971/2 to 78.2 million in 1986/7. This alarming rise is costly both to the employee and the employer. This paper describes how one large-supermarket store examined the extent of the problem experienced by their staff and what measures the management took to alleviate the situation. The great majority of studies concerning supermarket workers have examined only the cashiers' workstations (e.g. Wilson and Grey, 1984; Thorne and Russell, 1987, Krueger et al, 1988; Strasser 1990) often because of the introduction of laser scanning systems. The cashiers were typically found to report discomfort in the neck, shoulders, arms and back. A recent study by Ryan (1989) examined supermarket employees in a range of job areas and concluded that the cashiers experienced an excess prevalence of musculo-skeletal symptoms compared to other employees, particularly in the lower back and lower limbs. The discomfort in the lower limbs was associated with standing (whereas the other studies cited examined seated cashiers) and there appeared to be a threshold effect of about 50% of time spent standing for lower limb symptoms to appear. Earlier work by Buckle et al (1986) compared the incidence of musculo-skeletal disorders within female occupational groups including supermarket workers in general. It was pointed out that the supermarket workers showed only slightly lower prevalence rates of back pain than nurses who are known to be a group particularly at risk

Applications of the SAMMIE CAD system in workplace design

Computer Aided Design (CAD) is now firmly established in some industries as the normal method of originating and evaluating designs. Thus in aerospace it would be normal to have computer representations of proposed aircraft long before mock-ups or prototypes are available for functional evaluation. This implies that many aspects of the design may be finalised before there is any opportunity to carry out ergonomics evaluations of the work space or work tasks which will eventually confront the operator. Other industries are not so advanced in using computers in design, but would benefit from the ability to carry out ergonomics evaluations early in the design process. It is natural therefore to look for CAD systems which have the capability of considering human as well as mechanical, structural or other aspects of design. SAMMIE. System for Aiding Man-Machine Interaction Evaluation, is one such system which has been used in this way for some years. It assists in the building of a computer model of the workplace which can be viewed and manipulated on a graphics screen in ways which will be familiar to users of modern three-dimensional solid modelling systems. In addition. and most importantly, it includes a model of the human operator which is used as an evaluative tool. This paper very briefly describes the characteristics of SAMMIE but concentrates on describing applications of the technique to workplace design. In the main these applications originate from design consultancy carried out in recent years, and include supermarket checkout facilities, visibility studies in underground trains, and a machine shop environment