185,802 research outputs found
Richard-Sims/Sims_2023_Bergmann_pCO2: v1.0.0-Publication
No full textCode used as in Sims, R. P., Ahmed, M., Butterworth, B. J., Duke, P. J., Gonski, S. F., Jones, S. F., Brown, K. A., Mundy, C. J., Williams, W. J., and Else, B. G. T.: High interannual surface pCO2 variability in the Southern Canadian Arctic Archipelago's Kitikmeot Sea, https://doi.org/10.5194/egusphere-2022-710, 2023
Richard-Sims/Else_2022_Variability_in_sea_ice_carbonate_chemistry: v1.0.0 Publication
No full text<p>Code associated with Else, B. G. T., Cranch, A., Sims, R. P., Jones, S., Dalman, L. A., Mundy, C. J., Segal, R. A., Scharien, R. K., and Guha, T.: Variability in sea ice carbonate chemistry: A case study comparing the importance of ikaite precipitation, bottom ice algae, and currents across an invisible polynya, The Cryosphere</p>
Replication Data for: The Four Equation New Keynesian Model
No full textSims, E., Wu, J. C., and Zhang, J., (2023). “The Four-Equation New Keynesian Model.” Review of Economics and Statistics 105:4, 931–947
Quantitative SIMS Depth Distribution of Nitrogen in Nitrided Oxide at the SiO2/Si Interface
No full textNitridated gate oxides are quite common to be used in VLSI/ULSI MOS devices. Since this material presents several advantages compared with traditional silicon oxide [1, 2], there are strong research efforts both in developing it and in studying its chemical and electrical properties. To estimate the distribution of nitrogen in nitridated oxide, electron spectroscopies (Auger, XPS) have been frequently employed [3]. The limit in their sensitivity is around 1021 atoms/cm3. SIMS studies have been seldom used and normally applied to measure the hydrogen content [4,5,6]. In this paper we present SIMS analytical methodology giving a quantitative nitrogen distribution in systems like SiOxNy/Si by employing of suitable standards. To get a proper quantification at interface region we used as RSFs a linear extrapolation of Si and SiO2 RSFs weighting them by a factor proportional to tht oxigen signa
Stretching the limits of static SIMS with C-60(+)
No full textPristine and Au-covered molecular films have been analyzed by ToF-SIMS (TRIFT (TM)), using 15 keV Ga+ (FEI) and 15 keV C-60(+) (Ionoptika) primary ion sources. The use of C-60(+) leads to an enormous yield enhancement for gold clusters, especially when the amount of gold is low (2 nmol/cm(2)), i.e. a situation of relatively small nanoparticles well separated in space. It also allows us to extend significantly the traditional mass range of static SIMS. Under 15 keV C-60(+) ion bombardment, a series of clusters up to a mass of about 20,000 Da (Au-100(-): 19,700 Da) is detected. This large yield increase is attributed to the hydrocarbon matrix (low-atomic mass), because the yield increase observed for thick metallic films (Ag, Au) is much lower. The additional yield enhancement factors provided by the Au metallization procedure for organic ions (MetA-SIMS) have been measured under C-60(+) bombardment. They reach a factor of 2 for the molecular ion and almost an order of magnitude for Irganox fragments such as C4H9+, C15H23O+ and C16H23O-. (c) 2006 Elsevier B.V. All rights reserved
Universal Processor Architecture for Biomedical Implants: The SiMS Project
No full textHEALTHCARE in the 21st century is changing rapidly. In advanced countries, in particular, healthcare is moving from a public to a more personalized nature. However, the costs of healthcare worldwide are increasing every year. Better use of technology can and should be used to get control of these costs. At the same time, implants have clearly benefitted from the astounding technology-miniaturization trends of late, boasting smaller sizes, lower power consumption and increased performance of the transistor devices. However, such advances do not come for free. Adverse effects in current implant designs are being witnessed, such as increasing power consumption, absence of design for reliability and highly application-specific nature. Operating under the assumption that implants will constitute an important means towards improved, personal healthcare and, in view of the aforementioned design phenomena, we believe that a new paradigm in implant design is required. This dissertation establishes the concept of Smart implantable Medical Systems (SiMS). SiMS is a systematic approach – a framework – for providing biomedical researchers and, hopefully, industry with a toolbox of ready-to-use, highly reliable implant sub-systems and models in order to construct optimal implants for various medical applications. The SiMS framework has to guarantee essential attributes, such as high dependability, modular design, ultra-low power consumption and miniature size. Having defined the SiMS framework, this dissertation is, then, concerned with exploring the optimal microarchitectural details of a crucial SiMS component: the SiMS processor. Contrary to the current state of the art, this processor aspires to be a new universal, low-power and low-cost processor and capable of efficiently serving a wide range of diverse implant applications.Computer Science and EngineeringElectrical Engineering, Mathematics and Computer Scienc
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
Beatrice Sims
No full textPosed, Sims [Head of Binding] in library with stack of periodicals ready for binding. (On verso: Sims, Beatrice C.
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
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