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Examines the effectiveness of using expensive robotics equipment in the food industry where profit margins are low and labour is less expensive than in other industries. Looks at the work undertaken at the Silsoe Research Institute into developing appropriate low‐cost technology for basic food applications. Projects discussed include robotic teat cups for milking cows and a robotic mushroom harvesting; both using pneumatic power transmission. Concludes that food production will become an important application for robotics when it is generally accepted as cost effective.

The purpose of this paper is to propose going one step further in the simulation tools related to agriculture by integrating fleets of mobile robots for the execution of precision agriculture techniques. The proposed new simulation environment allows the user to define different mobiles robots and agricultural implements.

With this computational tool, the crop field, the fleet of robots and the different sensors and actuators that are incorporated into each robot can be configured by means of two interfaces: a configuration interface and a graphical interface, which interact with each other.

The system presented in this article unifies two very different areas – robotics and agriculture – to study and evaluate the implementation of precision agriculture techniques in a 3D virtual world. The simulation environment allows the users to represent realistic characteristics from a defined location and to model different variabilities that may affect the task performance accuracy of the fleet of robots.

This simulation environment, the first in incorporating fleets of heterogeneous mobile robots, provides realistic 3D simulations and videos, which grant a good representation and a better understanding of the robot labor in agricultural activities for researchers and engineers from different areas, who could be involved in the design and application of precision agriculture techniques. The environment is available at the internet, which is an added value for its expansion in the agriculture/robotics family.

The purpose of this study is to examine theoretically the axisymmetric flow of a steady free-surface jet emerging from a tube for high inertia flow and moderate surface tension effect.

The method of matched asymptotic expansion is used to explore the rich dynamics near the exit where a stress singularity occurs. A boundary layer approach is also proposed to capture the flow further downstream where the free surface layer has grown significantly.

The jet is found to always contract near the tube exit. In contrast to existing numerical studies, the author explores the strength of upstream influence and the flow in the wall layer, resulting from jet contraction. This influence becomes particularly evident from the nonlinear pressure dependence on the upstream distance, as well as the pressure undershoot and overshoot at the exit for weak and strong gravity levels, respectively. The approach is validated against existing experimental and numerical data for the jet profile and centerline velocity where good agreement is obtained. Far from the exit, the author shows how the solution in the diffusive region can be matched to the inviscid far solution, providing the desired appropriate initial condition for the inviscid far flow solution. The location, at which the velocity becomes uniform across the jet, depends strongly on the gravity level and exhibits a non-monotonic behavior with respect to gravity and applied pressure gradient. The author finds that under weak gravity, surface tension has little influence on the final jet radius. The work is a crucial supplement to the existing numerical literature.

Given the presence of the stress singularity at the exit, the work constitutes a superior alternative to a computational approach where the singularity is typically and inaccurately smoothed over. In contrast, in the present study, the singularity is entirely circumvented. Moreover, the flow details are better elucidated, and the various scales involved in different regions are better identified.

The Minister of Health has made Regulations entitled the Public Health (Preservatives, etc., in Food) Amendment Regulations, 1927, which take the place of the provisional Regulations dated 8th April, 1927, and incorporate in addition a few minor amendments of the principal Regulations.

Chapter 2 offers examples of colonial and neocolonial working throughout history. This chapter defines and provides an overview of colonialism’s development and its economic and administrative roots. This chapter is intended to contextualize colonialism rather than explain its complete history.

Considerable effort is devoted to developing new models for organizing bibliographic metadata. However, such models have been repeatedly criticized for their lack of proper user testing. The purpose of this paper is to present a study on how non-experts in bibliographic systems map the bibliographic universe and, in particular, how they conceptualize relationships between independent but strongly related entities.

The study is based on an open concept-mapping task performed to externalize the conceptualizations of 98 novice students. The conceptualizations of the resulting concept maps are identified and analyzed statistically.

The study shows that the participants’ conceptualizations have great variety, differing in detail and granularity. These conceptualizations can be categorized into two main groups according to derivative relationships: those that apply a single-entity model directly relating document entities and those (the majority) that apply a multi-entity model relating documents through a high-level collocating node. These high-level nodes seem to be most adequately interpreted either as superwork devices collocating documents belonging to the same bibliographic family or as devices collocating documents belonging to a shared fictional world.

The findings can guide the work to develop bibliographic standards. Based on the diversity of the conceptualizations, the findings also emphasize the need for more user testing of both conceptual models and the bibliographic end-user systems implementing those models.

In a communication to the Evening Standard, SIR JAMES CANTLIE observes that the new wave of influenza coincides with the break in the weather, and is of considerable virulence. The utmost personal precautions are necessary. The disease attacks the low‐toned and the worried people most quickly.

TO operate effectively in his environment a man should seek to appreciate the sources which created it. There are few better ways for the work study man, or others concerned with the efficient running of the industrial machine, to do so than by digesting Management Thinkers, published at 40p in the Pelican Library of Business and Management.

RETIRING prime ministers are customarily offered an earldom. Because this often involves a change of name and historical oblivion, some of the greatest among them, men like Pitt and Gladstone and Churchill, have declined the honour. They understood that it is not names which give confidence in things, but things which give confidence in names. What would an Earl Chartwell of Westerham mean to future generations compared with the clarion voice we know as Churchill?

“The Hospital” observes that with the establishment by numerous investigations of the paramount importance of those ingredients of diet which are known as vitamines (and especially so in the case of the young, both of the human species and of animals) has come as a natural consequence a critical attitude towards many articles of infant and adult dietary which have hitherto been taken on trust. In a recently published research, or series of researches, conducted at the Lister Institute by Dr. HARRIETTE CHICK, and other workers, and published in the “Lancet,” some very important new facts are disclosed concerning the vitamine content of various common articles of diet. And the application of this work, and of other recent researches along the same lines, is discussed in the same journal by Dr. E. A. BARTON, medical officer to the infant department of University College Hospital, who touches also on the economic aspects of the results of these researches. Those who have followed the progress of recent medical thought on vitamines are aware that these peculiar substances, present only in the most minute quantities in fresh animal and vegetable foods, are of varying natures, as well as of varying quantity, in different foodstuffs. Some of the most important are those which ward off scurvy. Their total absence, or relative insufficiency, in the diet of man or animals is followed, sooner or later, by the symptoms, more or less severe, and not always easily recognisable in mild cases, of that peculiar disease. The conclusions reached appear, on the evidence offered, to be valid.