267,928 research outputs found
Levels of abstraction in human supervisory control teams
This paper aims to report a study into the levels of abstraction hierarchy (LOAH) in two energy distribution teams. The original proposition for the LOAH was that it depicted five levels of system representation, working from functional purpose through to physical form to determine causes of a malfunction, or from physical form to functional purpose to determine the purpose of system function. The LOAH has been widely used throughout human supervisory control research to explain individual behaviour. The research seeks to focus on the application the LOAH to human supervisory control teams in semi-automated âintelligentâ systems
A Low-Overhead Script Language for Tiny Networked Embedded Systems
With sensor networks starting to get mainstream acceptance, programmability is of increasing importance.
Customers and field engineers will need to reprogram existing deployments and software developers
will need to test and debug software in network testbeds. Script languages, which are a popular
mechanism for reprogramming in general-purpose computing, have not been considered for wireless sensor
networks because of the perceived overhead of interpreting a script language on tiny sensor nodes.
In this paper we show that a structured script language is both feasible and efficient for programming
tiny sensor nodes. We present a structured script language, SCript, and develop an interpreter for the
language. To reduce program distribution energy the SCript interpreter stores a tokenized representation
of the scripts which is distributed through the wireless network. The ROM and RAM footprint of the
interpreter is similar to that of existing virtual machines for sensor networks. We show that the interpretation
overhead of our language is on par with that of existing virtual machines. Thus script languages,
previously considered as too expensive for tiny sensor nodes, are a viable alternative to virtual machines
The George Gund Foundation 2014 Annual Report
The George Gun Foundation 2014 Annual Report of financial expenditures and activities
George Gund Foundation - 2009 Annual Report
Contains president's letter, executive director's letter, photo essay, 2009 grants list, financial statements, grant guidelines and application procedures, and lists of board members and staff
Food chains and value system: the case of potato, fruit, and cheese
The aim of the paper is to analyse patterns of value system sharing along food chains, so to explore the agro-food enterprises capacity to be competitive and sustainable. The research focused on three food chains: potato, fruit, and Grana cheese of Emilia Romagna region. The paper adopts the value system approach. The methodology is aimed at creating a consolidated financial statement for each food chain so to re-create the chain operating profit and identify how this is shared among the different food chain stages. The analysis is carried out on 189 enterprises for the potato chain, 187 for the fruit chain and 203 for the cheese chain. The number of enterprises was invariable over the 5 year 2003-2007, leading to some 2,900 financial statement analysis. The chains analysed show differences. In the potato and fruit chains 35% of value is created by distribution, whereas in cheese chain only 13.6%. Over the five years value decreases 5% in fruit and potato and 9% in cheese. The lack of adequate strategic food chain partnership allows an increasing retail market power over the whole chain at the expenses of the primary sector entailing a declining sustainability for all chain actors.food chain, value system, profitability, potato, fruit, cheese, Agricultural and Food Policy,
Lloyd A. Fry Foundation - 2005 Annual Report
Contains mission statement, board chair's and executive director's messages, program information, grantee profiles, grants list, financial statements, grant guidelines, and lists of board members and staff
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