6,019 research outputs found
The Role of Evidence in Establishing Trust in Repositories
No full textThis article arises from work by the Digital Curation Centre (DCC) Working Group examining mechanisms to roll out audit and certification services for digital repositories in the United Kingdom. Our attempt to develop a program for applying audit and certification processes and tools took as its starting point the RLG-NARA Audit Checklist for Certifying Digital Repositories. Our intention was to appraise critically the checklist and conceive a means of applying its mechanics within a diverse range of repository environments. We were struck by the realization that while a great deal of effort has been invested in determining the characteristics of a 'trusted digital repository', far less effort has concentrated on the ways in which the presence of the attributes can be demonstrated and their qualities measured. With this in mind we sought to explore the role of evidence within the certification process, and to identify examples of the types of evidence (e.g., documentary, observational, and testimonial) that might be desirable during the course of a repository audit.
Dynamic Electrical-Magnetic-Thermal Simulation of Magnetic Components
No full textThis paper describes how the modeling and simulation of electro-magnetic devices can be extended to include dynamic thermal effects. The power generated by hysteresis inside ferrite cores is connected to a thermal model of the core material. The thermal conduction of the core material is modeled as is the convection of thermal energy from the core to the surrounding environment. The effective temperature change inside the core is used to modify the parameters of the core material model to accurately reflect the dynamic performance of the device at all temperatures. The electrical circuit, magnetic material and thermal networks are all modeled concurrently in the time domain to allow dynamic interactions across all three domains
Optical power and intelligent sensors
No full textThe possibilities of optically powered intelligent sensors are studied by means of a model realised in MSI. Proposals are made for simplified communication protocols that allow the power budget to be optimised. Measurements are made under control of commands transmitted along the optical power line and data returned. this is achieved with an electrical power at the sensor head of less than 100 µW, enabling the system to operate with an optical power of the order of 1 mW
PV system sizing using observed time series of solar radiation
No full textSizing represents an important part of photovoltaic system design. This paper describes a sizing procedure based on the observed time series of solar radiation. Using a simple geometrical construction, the sizing curve is determined as a superposition of contributions from individual climatic cycles of low daily solar radiation. Unlike the traditional methods based on loss-of-load probability, the reliability of supply enters in this method through the length of the time series of data used in the analysis. The method thus resembles techniques used in other branches of engineering where extreme values are considered as functions of certain recurrence intervals
Modelling battery charge regulation for stand-alone photovoltaic systems
No full textA new model for the charge and discharge characteristics of a lead-acid battery is presented which aims to model the effect on capacity of variable charge and discharge rates. This model has been implemented using the circuit simulator PSPICE, and is used to investigate the effect of the charge controller strategy on the performance of a stand-alone PV system. It is shown that a simple limit on charging voltage is probably adequate to achieve a high state of charge, although a two-level regulator may be needed to maintain battery condition. The benefits of maximum power point tracking are also investigate
, Ross Laird
No full textRoss Laird, PhD RCC is a clinical consultant focused on trauma, addictions, and social vulnerability. He is also a best-selling author, award-winning scholar and educator, and clinical supervisor for BC’s largest licensed non-profit program in addictions, trauma, and mental health. Dr. Laird focuses particularly on traumatized and marginalized client populations — those navigating homelessness, mental illness, and complex trauma — and provides professional development training for organizations that serve them: social service agencies, first responders, cultural groups, nonprofits, and educational institutions. He also works extensively with organizations in arts and culture and Indigenous communities to develop trauma-informed practices for cultural programming, museum exhibitions, and community initiatives
Simulation of magneto-electronic systems using Kirchoffian networks
No full textWe describe a technique that allows the simulation of mixed magnetic and electronic circuits. Magnetic components are described in terms of lumped parameter primitive parts, which are interconnected at magnetic 'nodes'. Electrical and magnetic variables are treated in exactly the same manner. Methods of modelling hysteresis and eddy current effects are considered. As an example of a mixed system, an active Hall effect current transducer is analysed
Gay, Ross : poetry reading; September 13th, 2019
No full textContents:
All tracks Poetry reading [complete]
Track 01 Introduction
Track 02 The Mark of Lights
Track 03 To My Best Friend’s Big Sister
Track 04 An Ode To Buttoning And Unbuttoning My Shirt
Track 05 The High-Five From Strangers Eccetera
Track 06 To the Fig Tree On 9th and Christian
Track 07 Cup Liking
Track 08 An Abundance of Public Toilets
Track 09 Opera Singer
Track 10 Catalog of Unabashed Gratitude
Track 11  Q&A
Digital Projects SAN: folder location for wav and mp3 files: J:\Elliston Working\9-13-2019 (Ross, Gay
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