System for simultaneously loading program to master computer memory devices and corresponding slave computer memory devices

A bus programmable slave module card for use in a computer control system is disclosed which comprises a master computer and one or more slave computer modules interfacing by means of a bus. Each slave module includes its own microprocessor, memory, and control program for acting as a single loop controller. The slave card includes a plurality of memory means (S1, S2...) corresponding to a like plurality of memory devices (C1, C2...) in the master computer, for each slave memory means its own communication lines connectable through the bus with memory communication lines of an associated memory device in the master computer, and a one-way electronic door which is switchable to either a closed condition or a one-way open condition. With the door closed, communication lines between master computer memory (C1, C2...) and slave memory (S1, S2...) are blocked. In the one-way open condition invention, the memory communication lines or each slave memory means (S1, S2...) connect with the memory communication lines of its associated memory device (C1, C2...) in the master computer, and the memory devices (C1, C2...) of the master computer and slave card are electrically parallel such that information seen by the master's memory is also seen by the slave's memory. The slave card is also connectable to a switch for electronically removing the slave microprocessor from the system. With the master computer and the slave card in programming mode relationship, and the slave microprocessor electronically removed from the system, loading a program in the memory devices (C1, C2...) of the master accomplishes a parallel loading into the memory devices (S1, S2...) of the slave

Computer control of a microgravity mammalian cell bioreactor

The initial steps taken in developing a completely menu driven and totally automated computer control system for a bioreactor are discussed. This bioreactor is an electro-mechanical cell growth system cell requiring vigorous control of slowly changing parameters, many of which are so dynamically interactive that computer control is a necessity. The process computer will have two main functions. First, it will provide continuous environmental control utilizing low signal level transducers as inputs and high powered control devices such as solenoids and motors as outputs. Secondly, it will provide continuous environmental monitoring, including mass data storage and periodic data dumps to a supervisory computer

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Chiefly tablesIncludes bibliographical referencesSupported in part by the National Institute of Education under contract no. US-NIE-C-400-76-011

Offshore Turbine Arrays: Numerical Modeling and Experimental Validation

The interaction between wind turbines in a large wind farm needs to be better understood to reduce array losses and improve energy production. A numerical test bed for an array of offshore wind turbines was developed in the open-source computational fluid dynamics (CFD) framework OpenFOAM. It provides a computational tool which can be used in combination with physical model turbine array studies in the Flow Physics Facility (FPF) at UNH as well as other test facilities. Turbines were modeled as actuator disks with turbulence sources to reduce computational cost. Both k-ϵ and k-ω SST turbulence models were utilized to capture the flow in the near-wall, wake, and free stream regions. Experimental studies were performed in the FPF to validate the numerical results and to provide realistic initial and boundary conditions, for example turbulent boundary layer inlet velocity profiles. Mesh refinement and boundary condition studies were performed. Numerical simulations were executed on a custom-built server, designed to be the head node of a future CFD cluster. The entire project was built on open-source software to facilitate replication and expansion. The numerical model provides building blocks for simulations of large wind turbine arrays, computational resources permitting. The numerical model currently replicates a three by one array of wind turbines in the FPF, and provides detailed insight into the array fluid dynamics

Do the benefits of international policy commitments outweigh the burdens for small island states? : a case study of the Convention on Biological Diversity and the Federated States of Micronesia

The Federated States of Micronesia (FSM) is a small island developing state (SIDS) comprising four semi-autonomous states. The country faces a number of environmental challenges, not least of which is the loss of biodiversity upon which it relies for subsistence and economic development. The FSM is a signatory to the UN Convention on Biological Diversity (CBD) and must develop and deliver a National Biodiversity Strategy and Action Plan as a way of implementing the convention and protecting its biodiversity. For a SIDS like the FSM, being a party to the CBD presents a notable burden: fielding personnel to global meetings, crafting necessary policies and legislation and implementing such policies. This article explores the perceptions of what being a signatory to the CBD brings to those in countries such as the FSM who are responsible for, or involved in, developing and implementing biodiversity conservation policy and actions. It highlights specific perceived benefits and challenges, and considers these in relation to the status of biodiversity in the FSM today.peer-reviewe

Impact of climate change on first generation biofuels production in the 21st century

This study assessed the potential (near, medium, and long term) impacts of climate change on first generation corn bioethanol and soybean biodiesel production in Gainesville, Florida, USA. The Decision Support System for Agrotechnology Transfer-Cropping System Model (DSSAT-CSM) was used to simulate biomass and grain yield under climate change scenarios in the 21st century with direct effect of CO2. Weather projection was made for each scenario using the 10 year weather data for the baseline period (1981–1990). Precipitation is projected to increase by +20, +10, -10, and -20% every month throughout the growing season. Daily minimum and maximum air temperatures are projected to increase by +1.5, +3, and +5oC. Atmospheric CO2 is projected to increase by +70 and +350ppm. Simulated yields (grains/seeds and by-products) were then used as inputs into the LCA models. Results show that while bioethanol from corn and biodiesel from soybean offers some potential for GHG emissions savings per cultivated ha of set-aside land, this is tempered by rising air temperature. However, increased atmospheric levels of CO2 relative to current condition would reduce the severe impact of warming. Only soybean biodiesel will be positively affected by climate changes