271,345 research outputs found
Battery Electric Vehicles (BEVs) in Underground Mines - The SIMS and NEXGEN SIMS projects [Elektronisk resurs] : [Batterimaskiner i underjordsgruvorna – SIMS och NEXGEN SIMS projekten]
No full textAtt ersätta dieselmaskiner med elfordon i underjordsgruvor har identifierats av gruvindustrin som ett kritiskt steg för att förbättra arbetsmiljön genom att minska dieselavgaser, samtidigt som man sänker elkostnaden för gruvventilation genom att minska behovet och minska utsläppen av växthusgaser. Alla dessa är viktiga krav för att uppnå en hållbar framtida gruvbrytning under jord, inklusive ett mål om noll koldioxidutsläpp och en mycket låg koncentration av atmosfäriska föroreningar på arbetsplatser.Av alla typer av elfordon är batterimaskiner (Battery Electric Vehicles – BEVs på engelska) den mest lämpliga för underjordiska gruvdrift på grund av sin flexibilitet. Med den senaste utvecklingen inom batteriteknologi har tillförlitliga BEVs tillverkats sedan 2016. En undersökning måste dock göras för att säkerställa att de introduceras smidigt i den operativa verksamheten. Därför har Europeiska unionen (EU) finansierat två projekt, nämligen SIMS och NEXGEN SIMS där flera BEVs ska utvärderas vid flera gruvor inom EU. Den här artikeln beskriver några resultat av dessa försök som bland annat inkluderar förbättring av arbetsmiljön, förbrukningen av elkraft samt hur tekniken uppfattas av operativ personal och ledning. Studien omfattar resultat från intervjuer av verksamheter utanför EU-projektet.Replacing diesel machines with electric vehicles in underground mines has been widely acknowledged by the mining industry as a critical step to improve working conditions by reducing diesel exhaust contaminants, whilst also lowering mine ventilation electrical power cost by reducing mine airflow requirement and reducing greenhouse gas emissions. All of these are major requirements to achieve sustainable future underground mining practices, including a target of zero carbon emissions and a very low concentration of atmospheric contaminants in workplaces.Among all types of electric vehicles, Battery Electric Vehicles (BEVs) is the most suitable for underground mining application due to its flexibility. With the recent developments in battery technology, reliable BEVs have been manufactured since 2016. However, an investigation must be carried out to ensure their smooth introduction. Therefore, the European Union (EU) has funded two projects namely SIMS and NEXGEN SIMS where several BEVs were trialled at several EU mines. This paper outlines some results of these trials which include, among others, improvement of working conditions, power consumption, perception of the mineworkers, and perception of the mine management. Moreover, perception of the management of mines that are not part of the project consortium but have trialled BEVs is also outlined in this paper.</p
Se i Sims vanno su Facebook…
No full textSubito dopo il lancio, la versione facebookiana di The Sims ha riscosso un enorme successo, ma a distanza di qualche mese si è registrato un significativo calo di interesse. L’articolo propone una possibile lettura di questo fenomeno, partendo da alcune caratteristiche della serie The Sims e mostrando come il gioco si sia modificato, sposandosi con le logiche 2.0 di Facebook, per diventare più social e in real time
Sims, William Sowden
No full textBrief biographical article summarizing the career and contributions to World War I of Admiral William S. Sims
Experience of an information aid for newly diagnosed multiple sclerosis patients: a qualitative study on the SIMS-Trial.
No full textBackground The SIMS-Trial (ISRCTN81072971) proved the effectiveness, in terms of patient's knowledge and care satisfaction, of an add-on information aid (personal interview with a physician using a navigable CD and take-home booklet) in 120 newly diagnosed patients with multiple sclerosis (MS) from five Italian centres.
Objective To scrutinize the experience of SIMS-Trial participants in order to gain better understanding of the effectiveness of the information aid and its components.
Design We performed (i) nine individual semi-structured interviews with a purposeful sample of SIMS-Trial patients who received the information aid, (ii) focus group meeting (FGM) with the physicians who conducted the personal interview, and (iii) FGM with patients' caring neurologists.
Results Patients' experience with the information aid was positive as it enhanced their understanding of their disease, being viewed as a guided tour of their medical condition. The physicians who conducted the personal interviews were also positive in their overall evaluation but noted an initial difficulty in using the CD. The caring neurologists had limited direct experience of the aid, and their views were confined to utility of the information aid in general. All participants considered the combination of personal interview, CD navigation and take-home booklet essential, but urged a more flexible scheduling of the personal interview. It also emerged that
some content required revision and that the aid was unsuitable for patients with primary progressive MS
Visualisation of amphetamine contamination in fingerprints using tof-sims technique
No full textTime-of-flight secondary ion mass spectrometry (TOF-SIMS) was applied to detect traces of amphetamine on fingerprints. In the present study, three different lift tapes and latent powder fingerprints were tested. The obtained results show that it is possible to identify traces of a drug as well as its distribution over the tested fingerprint after its transfer from the primary base onto an adhesive lifter (secondary base). Moreover, images obtained by the TOF-SIMS technique enable the observation of very small areas of the analysed fingerprint as well as the identification of micro-objects (residues of a contaminant) that were left on the fingerprint. The use of the black latent fingerprint powder did not interfere with the TOF-SIMS analysis, which makes it possible to effectively use this technique to study the traces of substances on the revealed fingerprints.ChemE/Advanced Soft Matte
Harry A Sims Jr
No full textSeries 85298 | State Historical Society | World War I service questionnaires | Harry A Sims JrThis series contains military service questionnaires and photographs of Utah's World War I veterans compiled by the Utah State Historical Society shortly after the war. The forms were sent to veterans or their families to complete and return
Interest of silver and gold metallization for molecular SIMS and SIMS imaging
No full textThe metallization procedure, recently proposed for signal improvement in organic secondary ion mass spectrometry (metal assisted-SIMS or MetA-SIMS), has been quantitatively evaluated for Irganox 1010 and polystyrene fragment and quasimolecular ions. in addition to gold, we investigate the effect of silver evaporation as a sample treatment prior to static SIMS analysis. Ion yields and yield enhancement factors are compared for Ag and Au-metallized molecular films, pristine coatings on silicon and sub-monolayers of the same molecules adsorbed on silver and gold. The results are sample-dependent but, as an example, the yield enhancement calculated for metallized polymer additive (Irganox 1010) films with respect to untreated coatings is larger than two orders of magnitude for the quasimolecular ion and a factor between I and 10 for characteristic fragments. The interest of the method for imaging SIMS applications is illustrated by the study of a non-uniform coating of polystyrene oligomers on a 100 mum polypropylene film. (C) 2004 Elsevier B.V. All rights reserved
Synthesis of furanosesquiterpenoid natural products
No full textThe effect of addition of a catalytic quantity of a crown ether in the reaction of a phosphonate anion with a carbonyl compound (Wadsworth-Emmons reaction) has been studied and found to greatly facilitate this reaction. This modification of the Wadsworth-Emmons reaction, using a catalytic amount of 15-crown-5, has been employed in the synthesis of the naturally occurring furanosesquiterpene Pallescensin-E. The structure of this compound has been confirmed by comparison of its spectral data with that of the synthesised isomer, 4,l0-dihydro-7,8-dimethyl 10H-benzof4,5Jcycloheptafl,2-bJ furan.Homosesquirosefuran, an analogue of the naturally occurring furanosesquiterpene Sesquirosefuran, has been synthesised via the dianion of methylacetoacetate.An approach to the synthesis of Pinguisone (a component of the essential oil of the liverwort Aneura pinguis)has been attempted employing two Diels-Alder reactions to generate the four cis-methyl groups found in the natural product.In a study of the reaction of n-(2-methylallyl)nickel bromide complex with a range of epoxides, this complex was found not only to react with reactive epoxides (e.g. styrene epoxide) but also with less reactive propylene epoxide.Substrates for possible intramolecular n-allylnickel cyclisation to generate an a-methylene-6-valerolactone ring system have been prepared
'A bright memory to remain' : the life and works of Charles Sims RA (1873-1928)
No full textThis thesis investigates the life and work of the English painter Charles Sims RA (1873-1928). It takes the form of a monograph and examines key themes of Sims' career within a chronological framework. The study makes consistent reference to the Sims Archive — the artist's studio contents recently brought to light by the author in negotiation with the artist's family and currently in the possession of Northumbria University. For the first time Sims' working practices and motivations have been explored in detail, thus contributing to knowledge of this particular neglected painter and more generally allowing some additional insight into the problems besetting and opportunities afforded to British artists of his generation. Sims' career spanned a transitional period in British art history which is currently being reassessed by art historians: the debates surrounding the effects of European modernism on British art, the inevitable impact of the Great War and the search during the 1920s for a visual language appropriate to modern life. Sims negotiated disparate experiences and preoccupations in an interesting way, and produced a stylistically diverse body of work in his continued search, I argue, for an alternative to modern reality. He attempted the combination of ancient religions, past art and modern experience into pictorial idylls that were simultaneously familiar and unattainable. The thesis aims to explore Sims' inspiration and reassesses his career within the context of his better known contemporaries by cross-referencing information held in national and international collections, libraries and archives with the hitherto unseen material here
Monoportula P. A. Sims & D. M. Williams, nov. gen.
No full text<i>Monoportula</i> P.A.Sims & D.M.Williams nov. gen. <p> <b>Registration</b>: http://phycobank.org/103661</p> <p> Type species:— <i>Monoportula uralensis</i> (Strelnikova) P.A.Sims & D.M.Williams nov. comb.</p> <p>Frustules cylindrical, valve face circular, flat. Valve face bordered by expanded marginal ridge separating it from vertical mantle. Areolae poroid, on valve face arranged in interrupted radial and sub-radial rows extending from off-centre hyaline area from which a stout spine extends. Scattered spinules cover valve face disturbing areolar arrangement. Mantle areolae in vertical rows situated between hyaline marginal ridge and hyaline valve margin. Mantle areolae covered by network of anastomosing costae. Internally areolae sunk in rows between hyaline ribs, areolae becoming more numerous towards valve margin. One (1) rimoportula present, its external opening through stout tube expanded at its summit, internally as slit between raised lips.</p>Published as part of <i>Williams, David M., Sims, Pat A. & Witkowski, Jakub, 2023, Notes on the rare Cretaceous species Syndetocystis uralensis Strelnikova leading to the description of a new monotypic genus Monoportula P. A. Sims et D. M. Williams nov. gen., pp. 219-224 in Phytotaxa 595 (2)</i> on page 220, DOI: 10.11646/phytotaxa.595.2.8, <a href="http://zenodo.org/record/7905940">http://zenodo.org/record/7905940</a>
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