384 research outputs found
Graham Metson : Kalioka Verberra...Elusive Cosmos Emenae
No full textThis catalogue documents an exhibition held during the 50th Canadian Tulip Festival where artist Metson was chosen for his expressive and colourful work. The authors describe the artist’s work in terms of colour, form and subject matter. Author Bouchard alludes to the contemporary nature of Metson’s work and discusses the artist’s sources of inspiration. Biographical notes (3 p.). Texts in English and French
SiteDB: Marshalling people and resources available to CMS
No full textIn a collaboration the size of CMS (approx. 3000 users, and almost 100 computing centres of varying size) communication and accurate information about the sites it has access to is vital in co-ordinating the multitude of computing tasks required for smooth running. SiteDB is a tool developed by CMS to track sites available to the collaboration, the allocation to CMS of resources available at those sites and the associations between CMS members and the sites (as either a manager/operator of the site or a member of a group associated to the site). It is used to track the roles a person has for an associated site or group. SiteDB eases the coordination load for the operations teams by providing a consistent interface to manage communication with the people working at a site, by identifying who is responsible for a given task or service at a site and by offering a uniform interface to information on CMS contacts and sites. SiteDB provides api's and reports for other CMS tools to use to access the information it contains, for instance enabling CRAB to use "user friendly" names when black/white listing CE's, providing role based authentication and authorisation for other web based services and populating various troubleshooting squads in external ticketing systems in use daily by CMS Computing operations
Scaling CMS data transfer system for LHC start-up
No full textThe CMS experiment will need to sustain uninterrupted high reliability, high throughput and very diverse data transfer activities as the LHC operations start. PhEDEx, the CMS data transfer system, will be responsible for the full range of the transfer needs of the experiment. Covering the entire spectrum is a demanding task: from the critical high-throughput transfers between CERN and the Tier-1 centres, to high-scale production transfers among the Tier-1 and Tier-2 centres, to managing the 24/7 transfers among all the 170 institutions in CMS and to providing straightforward access to handful of files to individual physicists
An appraisal of nutrient supplies available for tree growth in a pumice soil
No full textChemical analyses have confirmed and explained the results of an earlier pot trial in which the availability of major nutrients in six pumice ash layers of Kaingaroa silty sand was assessed by the growth of radiata pine seedlings.
Almost all of the tree-available P is found in the present topsoil: the quantities-of P that occur in two buried soils (Waimihia and Rotoma ashes) are almost entirely in the form of organic P which is apparently very resistant to breakdown due to complexing with allophane. The N in these layers is similarly unavailable.
The mineral layers, about 4 ft in thickness (Taupo pumice and lapilli), which lie between the present topsoil and the uppermost buried soil, are very low in total N and P and exchangeable Mg, but relatively high in exchangeable K. Only the lower buried soil contains a reasonable quantity of exchangeable Mg and has a Mg : K ratio in favour of Mg
Evolution of the Distributed Computing Model of the CMS experiment at the LHC
No full textThe Computing Model of the CMS experiment was prepared in 2005 and described in detail in the CMS Computing Technical Design Report. With the experience of the first years of LHC data taking and with the evolution of the available technologies, the CMS Collaboration identified areas where improvements were desirable. In this work we describe the most important modifications that have been, or are being implemented in the Distributed Computing Model of CMS. The Worldwide LHC computing Grid (WLCG) project acknowledged that the whole distributed computing infrastructure is impacted by this kind of changes that are happening in most LHC experiments and decided to create several Technical Evolution Groups (TEG) aiming at assessing the situation and at developing a strategy for the future. In this work we describe the CMS view on the TEG activities as well
The nature and impacts of fines in smelter-grade alumina
No full textFines in smelter-grade aluminas art recognized (is a significant process problem in aluminum smelting. However understanding the nature of this fine material and how it impacts the reduction process arc, less clearly understood The combination of new analytical methods such as variable pressure scanning electron microscopy and very; high field solid state nuclear magnetic resonance provide new insights into the phases present and their spatial distribution within aluminas, and suggest how such fine materials are generated, particularly during calcination in the alumina refinery
Applying the sustainable system-of-systems framework : wastewater(s) in a rapidly urbanising South African settlement
No full textAddressing wastewater infrastructure needs in urban informal settlements must simultaneously address legacies of past failures, current aspirations and constraints, as well as increasingly changing needs related to global environmental change. This study applied the Sustainable System-of-Systems framework for ergonomics and human factors to gain a better understanding of how small in-situ constructed wetlands could be a form of greywater treatment infrastructure in an informal settlement. Using 24 months of interviews, surveys, workshops and photo-ethnographic observations, we identified that the rapidly changing nature of parent (e.g. residency transience and land ownership) and sibling (e.g. housing and drinking water) systems put pressure on the target wetland system to adapt, often decreasing its capacity to deliver the service of water cleaning. Greywater treatment was not a common goal among stakeholders involved in the nested hierarchy system which likely contributed to the constructed wetlands needing to adapt to remain relevant. Practitioner summary: The value of the Sustainable Systems-of-Systems framework for ergonomics/human factors professionals in determining the sustainability of an ergonomics/human factors intervention is demonstrated using a greywater treatment system case study for an urban informal settlement. Understanding the variety of stakeholder goals and the pace of change in related systems was key to a sustainable intervention.Funding Agencies|WRC (South Africa) [K5/2953]; Formas (Sweden) [2018-02217]; BMBF (Germany) [02WGR008]</p
Facilitators & barriers to organic waste and phosphorus re-use in Montreal
No full textAbstract Cities have the capacity to play a key role in resource and pollution management through their decisions about organic waste. Often overlooked, but nevertheless essential, is the role that cities can play in increasing phosphorus (P) recycling because cities are consumers of large amounts of P-dense food and producers of vast amounts of P-rich waste. Most cities do not take advantage of this potential, seeing P as simply another part of organic waste to be disposed of elsewhere. For example, in Montreal, Canada, only 6% of P in waste is currently recycled. We used semi-structured interviews with key stakeholders (19), participant observation (over 1.5 years), and document review to identify key barriers and facilitators for Montreal to achieve a high level of organic waste recycling through composting. We found that a provincial law mandating 100% recycling of organic matter has great potential to facilitate increased P recycling. However, lack of a shared vision about the role of government, private sector, and citizens in producing high quality compost from waste products is a barrier that inhibits this potential. Cultural inertia, lack of knowledge, and lack of infrastructure also act as barriers to increasing composting in Montreal. Urban agriculture could be a means to overcome some of these barriers as it currently benefits from strong citizen support and is both a consumer and producer of compost. However limited access to potential garden space and training and diversity in desired fertilizer qualities among gardeners somewhat limit this potential. Investing in increasing social capital, and specifically in connecting urban agriculture to waste management objectives, and in linking key stakeholders to co-create shared visions about how to produce high quality compost may act as a stepping stone towards increasing Montreal citizens’ knowledge about, and support for, increasing organic waste and thus P recycling
WAUI : Web based Automation User Interface
No full textTähän opinnäytetyöhön on kuvattu Demolassa alkanutta WAUI-projektia, jonka päämääränä oli suunnitella ja toteuttaa Metso Automationille Web-selainpohjainen automaatio-ohjaussovellus. Sovelluksella piti pystyä lukemaan ja kirjoittamaan ohjattavan prosessin laitteiden arvoja Metson järjestelmään mahdollisimman reaaliaikaisesti.
Sovellus perustuu asiakas-palvelin -arkkitehtuuriin. Asiakkaan käyttöliittymään on tarkoitus mallintaa graafisten käyttöliittymäkomponenttien avulla Metson ohjattava prosessi mahdollisimman tarkasti. Asiakkaan käyttöliittymäkomponentit on kirjoitettu HTML5:lla ja sovelluslogiikka jQuerylla. Palvelin toimii WAUI:ssa kommunikaatiopalvelimena asiakkaan ja Metson järjestelmän välissä. Palvelin hakee, tallentaa ja ohjaa jatkuvasti tietoa Metson järjestelmästä asiakkaalle sekä välittää asiakkaan käyttöliittymästä ohjattavan prosessin laitteille asetetut arvot Metson järjestelmään. Palvelimella on käytetty ohjelmointikielenä Pythonia.
WAUI-projektin seurauksena syntynyt sovellus on vasta prototyyppi. Valmiiseen tuotteeseen olisi toteutettava vielä merkittäviä lisäyksiä. Tällaisia lisäyksiä olisivat ainakin tietoliikenteen salaus asiakkaan ja palvelimen välillä sekä sovelluksen käyttöoikeuksiin liittyvät seikat. Sovelluksen jatkokehitysmahdollisuuksille jäi myös tilaa: käyttöliittymän voisi esittää kaksiulotteisen grafiikan sijaan kolmiulotteisella grafiikalla ja käyttöliittymäeditorin, joka jäi projektin päätyttyä vielä kehitysasteelle, voisi toteuttaa valmiiksi.This thesis describes WAUI project which was implemented in Demola in co-operation with Metso Corporation. The goal of the project was to design and implement Web browser-based automation control application for Metso Automation. Application was supposed to be able to read and write the values of the process related devices into Metso ́s system in real-time.
The application is based on client-server architecture. The goal of the user interface was to model Metso ́s controlled process as accurately as possible using graphical user interface components. The user interface components of the client were written using HTML5 and the application logic using jQuery. In WAUI the server acts as communication server between the client and Metso ́s system. The server retrieves, saves, and forwards information constantly from Metso ́s system to client and forwards the values defined to controlled process devices from client’s user interface to Metso ́s system. The used programming language on the server side was Python.
The resulting WAUI-application is just a prototype. Significant additions should be implemented to complete the product. Such additions would include at least encryption of data communications between client and server and application access right related issues. There are still possibilities to develop the application further: the user interface could be presented by using three-dimensional graphics instead of two-dimensional graphics and user interface editor, which at the end of the project was still under development, could be completed
Potential Impact of Dietary Choices on Phosphorus Recycling and Global Phosphorus Footprints: The Case of the Average Australian City
No full textChanges in human diets, population increases, farming practices, and globalized food chains have led to dramatic increases in the demand for phosphorus fertilizers. Long-term food security and water quality are, however, threatened by such increased phosphorus consumption, because the world’s main source, phosphate rock, is an increasingly scarce resource. At the same time, losses of phosphorus from farms and cities have caused widespread water pollution. As one of the major factors contributing to increased phosphorus demand, dietary choices can play a key role in changing our resource consumption pathway. Importantly, the effects of dietary choices on phosphorus management are twofold: First, dietary choices affect a person or region’s “phosphorus footprint” – the magnitude of mined phosphate required to meet food demand. Second, dietary choices affect the magnitude of phosphorus content in human excreta and hence the recycling- and pollution-potential of phosphorus in sanitation systems. When considering options and impacts of interventions at the city scale (e.g., potential for recycling), dietary changes may be undervalued as a solution toward phosphorus sustainability. For example, in an average Australian city, a vegetable-based diet could marginally increase phosphorus in human excreta (an 8% increase). However, such a shift could simultaneously dramatically decrease the mined phosphate required to meet the city resident’s annual food demand by 72%. Taking a multi-scalar perspective is therefore key to fully exploring dietary choices as one of the tools for sustainable phosphorus management
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