The Costs and Returns of Scottish Potato Production

The gross and net margins for a representative sample of 53 Scottish potato producers classed as "Seed" (>80% of area grown for seed), "Ware" (>80% of area grown for Ware) and "Mixed" for the rest were obtained for the 1999 growing season according to the methodology of MAFF (1990,1999). The farms were arable. Yields were average but for seed growers for whom tuber number in the seed size is more important. Prices were the lowest for six years variable costs were high and gross margins are above the best for cereals. However fixed costs excluding seasonally rented land are considerable leaving negative net margins. Potato price fluctuates widely. Prices were high in 1998. Applying these prices to the 1999 data left good net margins. Average prices still left reasonable net margins. Break-even prices were £85/t for ware and £200/t for seed, which were not reached in three of the last six years. These results show the considerable investment in both fixed and variable costs and risk for this important Scottish crop.Crop Production/Industries,

Superintendents and Professional Development: Voices from the Field

The primary task of the educational leader is to assure high quality learning environments for all students. Research (Gordon, 2004; Sparks, 2007) supports the proposition that effective professional development contributes to instructional improvement by building educator capacity. Much of the research on professional development focuses in principal leadership in improving instruction (Blase & Blase, 2004). But district level administrators, especially the superintendent of schools, also have a role to play in school improvement. Standards for the preparation of school leaders specify competencies for superintendents that include the design and implementation of professional development programs based on sound research, best practices, district-and school-level data, and other contextual information (National Policy Board, 2002). The National Staff Development Council\u27s Standards (2001) also describe a comprehensive set of activities to improve student learning that apply to both campus and district level personnel. But while the research on the instructional leadership role of principals is extensive, comparatively little is said about how superintendents meet their own responsibilities in this area (Dufour, 2000; Hirsch, 2009; Firestone, Manquin, & Martinez, 2005)

An evaluation of the employment trends in the clothing & textile industry

A primary justification for the proposed quotas is the claim that 63 000 to 67 000 jobs have been lost over the past three and a half years (and that 1000 jobs are being lost per month)1 and that these losses are directly related to the significant growth in imports from China over this period. Further, it is argued that the imposition of quotas, will not only reverse this decline, but will raise employment in clothing and textiles by 50 000 to 60 000

Effect of Farm-Level Constraints, Existing and Prospective Policies on Expansion of Coconut-Based Intercropping in Sri Lanka

Coconut-based intercropping (CBI) in Sri Lanka was introduced some 20 years ago to overcome the two main limitations of traditional coconut monocropping, inefficient land use and low incomes to farmers, but it has not been widely adopted. This study analyses the effect of farm-level resource constraints, and government policies on the intensity of adoption of CBI. A multiperiod linear programming (MLP) model was applied for three farmer groups - resource poor, medium endowed, well endowed - categorised using cluster analysis. Data was collected from a survey of randomly selected 113 intercroppers. Empirical results reveal that expansion of CBI is mainly constrained by seasonal labour shortages for all farmer groups, particularly the well endowed, and by the scarcity of cash in the case of resource-poor farmers. CBI policies aimed at subsidising inputs or intercrop prices are not likely to be efficient in raising adoption, but alternative policies aimed at alleviating resource constraints would be more effective. The study concluded that the low adoption of CBI is mainly attributable to the scarcity of different farm-level resources (other than land), at varying degrees among different farmer groups. Hence a targeted approach to alleviate them is suggested.Crop Production/Industries,

The inclusions afforded by a value-led design process for technology-nature hybrids in a walled kitchen garden

This paper describes the importance of a values-led approach within a design collaboration in a National Trust garden in Nottinghamshire, UK. The project demonstrates the power of values to shape not only the designed artefacts but the whole design process. The work responds to reports from the National Trust and other organizations of people’s increased disconnection from the natural world, and seeks to challenge the perception that technology is instrumental in fueling such detachment. The primary contribution of our value-based and critically engaged design process is the creation of prototypes that embody values and act as a focal point for reflection and re-encounter by the stakeholder organization. A process that itself acts as a continuous prompt for renewed consideration of interpretation approaches and organizational messages. The research involves the design of technology-nature hybrids for interpretation of a Walled Kitchen Garden, to support connection to nature. Designs are grounded in organizational values drawn from National Trust and researcher- designer values drawn from critical theory of technology. The project explores an area of intersecting and overlapping values and discusses the tensions experienced working in this space. The project illustrates how the inclusion of values and critical philosophy opens up new possibilities for the use of materials and technologies to increase our connection to nature

Walking off the garden path:a design journey

This paper illustrates various digital-nature artefacts, which emerged from a reflective design journey to enhance and support novel connections to nature in a garden. The research imperative is to explore possibilities for the design of digital technologies for changing people’s interpretation of a National Trust garden, encouraging encounters through the artefacts that take visitors off the garden path and reawaken them to the “presence” of the garden. The process began with an exploration of the criticisms and possibilities of technologies suggested within the writings of Heidegger, Borgmann and Feenberg, which were complemented by insights from natural history writers such as Deakin. These writings guided the design sensibilities for the creation of a collection of interpretation artefacts including Audio Apples, Rhubaphones and a Nature Meditation Egg. Much of the work was situated in a Walled Kitchen Garden managed by National Trust. Research through design complements the research philosophy because it demands space for reflection and conversation, and enables inclusion of different voices within the design journey. The methodology has helped address the question of whether a design lens that begins with criticism of technology can change the way we design, and the artefacts produced

Development and Persistence of 'Static' or 'Dead' Zones in Flows

Certain ceramic products are formed through extrusion processes, where a slurry is forced through small openings to form such products as filters. At the top is a large tank. The slurry is forced through the tank into an extrusion chamber, and then out through slots to form the finished product. [The slurry may be thought of as a mixture of clay (or other polymers), water, and other binders. There are many ways to model this mixture, some of which will be discussed in this report. For instance, the slurry can be modeled as a non-Newtonian fluid, a two-phase flow with liquid and solids, or a viscoelastic fluid. One can also model the mixture as an elongated particle suspension in water, where changes in the orientation of the particles could affect the flow.] After the extrusion process is complete, one finds that ‘dead zones’ of dry paste accumulate in two areas. Most prominently, they occur at the lower corners of the tank. They also occur on the floor of the extrusion chamber near the slots, both near and away from the walls. Since we will consider wall effects in the tank, for the extrusion chamber we consider only flow cells sufficiently far away from the walls. Then we may exploit the periodic nature of the device and consider only a single flow cell. The aim of this project is to determine the formation mechanisms of these dead zones, and see how they affect the overall flow

High throughput sequencing in acute lymphoblastic leukemia reveals clonal architecture of central nervous system and bone marrow compartments

No abstract available

Schematics of a Water Balloon Launcher Design and Reproducible Water-Balloon-Filling Procedures Used for a Middle School Summer Science Camp

We recently held a Science Summer Camp for middle school students, designed to infuse young people with increased excitement for STEM (Science, Technology, Engineering, and Math) subjects. Our efforts, which received nationally-syndicated news coverage,1 included the invention of a versatile water balloon launcher. This document contains: (1) detailed construction schematics and user operation guidelines for our balloon launcher; (2) data and instructions for reproducibly filling water balloons to specific volumes and weights, within used by students during the summer camp