Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers

Many of British rivers hold stocks of salmon (Salmo salar L.) and sea trout (Salmo trutta L.) and during most of the year some of the adult fish migrate upstream to the head waters where, with the advent of winter, they will eventually spawn. For a variety of reasons, including the generation of power for milling, improving navigation and measuring water flow, man has put obstacles in the way of migratory fish which have added to those already provided by nature in the shape of rapids and waterfalls. While both salmon and sea trout, particularly the former, are capable of spectacular leaps the movement of fish over man-made and natural obstacles can be helped, or even made possible, by the judicious use of fish passes. These are designed to give the fish an easier route over or round an obstacle by allowing it to overcome the water head difference in a series of stages ('pool and traverse' fish pass) or by reducing the water velocity in a sloping channel (Denil fish pass). Salmon and sea trout make their spawning runs at different flow conditions, salmon preferring much higher water flows than sea trout. Hence the design of fish passes requires an understanding of the swimming ability of fish (speed and endurance) and the effect of water temperature on this ability. Also the unique features of each site must be appreciated to enable the pass to be positioned so that its entrance is readily located. As well as salmon and sea trout, rivers often have stocks of coarse fish and eels. Coarse fish migrations are generally local in character and although some obstructions such as weirs may allow downstream passages only, they do not cause a significant problem. Eels, like salmon and sea trout, travel both up and down river during the course of their life histories. However, the climbing power of elvers is legendary and it is not normally necessary to offer them help, while adult silver eels migrate at times of high water flow when downstream movement is comparatively easy: for these reasons neither coarse fish nor eels are considered further. The provision of fish passes is, in many instances, mandatory under the Salmon and Freshwater Fisheries Act 1975. This report is intended for those involved in the planning, siting, construction and operation of fish passes and is written to clarify the hydraulic problems for the biologist and the biological problems for the engineer. It is also intended to explain the criteria by which the design of an individual pass is assessed for Ministerial Approval

Introducing heterarchy : a relational-contextual framework within the study of International Relations : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Politics at Massey University, Manawatu, New Zealand

This thesis posits that for too long International Relations (IR) has been overly rigid and insular, discouraging cross-disciplinary cooperation within the social sciences and becoming increasingly irrelevant to policy-makers. IR academia tend to stick rigidly to their theoretical paradigms in interpreting the real world, straight-jacketing their thinking into theories that limit analysis. However, humans think relationally and contextually so why not apply this form of thinking to IR? Heterarchy, the theoretical framework presented here, seeks to overcome this silo effect, to expand IR’s relevance, and encompass previously barred academic areas to the sub-discipline. This thesis presents a new relational-contextual framework within which empirical variables can be situated to provide a different understanding of actors’ actions and speech acts within the IR field.1 Heterarchy sits in part within both foundationalist and anti-foundationalist ontologies, challenging both positivist and post-positive schools by relating the world through relationalcontextual rationales. Heterarchy suggests that IR (referring to the practice of international affairs) can best be understood from a sub-systemic viewpoint where the behavior of actors can only be observed by knowing the differing contexts between ‘self’ and ‘other’, and where relations continuously form and shape each actor; hence its relational-contextual nature. These relational-contexts are initiated through certain identifiable catalysts which stimulate similarly identifiable variables to expose actor relationships to the observer. While this does have constructivist and relativist underpinnings, heterarchy differentiates itself from both in terms of its approach and methodology. Having laid out this conceptual framework, the thesis then investigates how heterarchy might work empirically by exploring the Japanese-South Korean relationship which defies conventional understandings

Constructing a Theory of Educational Administration

The development of administrative theory has long been a quest for scholars in the field of educational administration. The beginnings of the development of a theory of educational administration began with Griffiths‘ (1959) now classic Administrative Theory, where he outlined the problem and noted, ―The field [of educational administration] is no longer neatly defined [and] textbooks are characterized by a search for the substance of administration and for a theory which binds the substance together‖ (p. 1-2). The need for such a theory has been important because a theory could serve to guide and support practice, even though the link between theory and practice has not always been articulated. In addition, the complex interactive nature of educational administration and the different school contexts have made it difficult to establish a uniform administrative theory. English (2002) called the theory-practice gap the ―Gordian Knot.‖ He noted, ―The theory-practice gap is a direct result of continuing to use inductive methods in creating theories for use in studying schools and the practices in them. The creation of … theories in educational administration … are not likely to come about under the way theories are constructed…in much of the present research‖ (p. 3)

The Control of Apple Blotch

Exact date of bulletin unknown.PDF pages: 1

Geometric Unification of Electromagnetism and Gravitation

A recently proposed classical field theory comprised of four field equations that geometrically couple the Maxwell tensor to the Riemann-Christoffel curvature tensor in a fundamentally new way is reviewed and extended. The new theory's field equations show little resemblance to the field equations of classical physics, but both Maxwell's equations of electromagnetism and Einstein's equation of General Relativity augmented by a term that can mimic the properties of dark matter and dark energy are shown to be a consequence. Emphasized is the emergence of gravity and the unification brought to electromagnetic and gravitational phenomena as well as the consistency of solutions of the new theory with those of the classical Maxwell and Einstein field equations. Unique to the four field equations reviewed here and based on specific solutions to them are: the emergence of antimatter and its behavior in gravitational fields, the emergence of dark matter and dark energy mimicking terms in the context of General Relativity, an underlying relationship between electromagnetic and gravitational radiation, the impossibility of negative mass solutions that would generate repulsive gravitational fields or antigravity, and a method for quantizing the charge and mass of particle-like solutions