171,823 research outputs found
Le latin dans l’enseignement primaire
No full textBossert Adolphe, Moy , Gautier M. C. Le latin dans l’enseignement primaire. In: La revue pédagogique, tome 3, Juillet-Décembre 1883. pp. 229-245
Strengthening a steel bridge with CFRP composites
No full textThe present paper reports the successful strengthening of Acton Bridge on the London Underground system using carbon fibre reinforced polymer (CFRP) plates. The adhesive used to bond the plates to the steel had to cure while trains continued to run over the bridge. Concerns arising from this were the effect of cyclic load during curing on the final bond strength and whether adhesive flexibility affected the reinforced sectionproperties. Tests to investigate these concerns are also reported.These tests involved reinforced beams subjected to cyclic loading of different intensities in bending during adhesive cure and tested statically at intervals to determine the build up of stiffness. The tests showed that, generally, adequate bond develops but at higher load intensities the strength of the bond is reduced and above limiting values of slip or developed shear stress at the steel/CFRP interface no bond will develop. A furtherconclusion was that adhesive flexibility does reduce section properties but by less than about 7%.Lap-shear tests conducted on specimens cut from the reinforced beams confirmed the bending test results. These showed that the biggest reductions in bond strength were at the ends of the beams where slip and shear stress were greates
The UK geography of the E-Society: a national classification
No full textIt is simplistic to think of the impacts of new information and communication technologies (ICTs) in terms of a single, or even small number of, 'digital divides'. As developments in what has been termed the ?e-society? reach wider and more generalisedaudiences, so it becomes appropriate to think of digital media as having wider-ranging but differentiated impacts upon consumer transactions, information gathering and citizen participation. This paper describes the development of a detailed, nationwide household classification based on levels of awareness of different ICTs; levels of use of ICTs; andtheir perceived impacts upon human capital formation and the quality of life. It discusses how geodemographic classification makes it possible to provide context for detailed case studies, and hence identify how policy might best improve both the quality and degree ofsociety?s access to ICTs. The primary focus of the paper is methodological, but it alsoillustrates how the classification may be used to investigate a range of regional and subregional policy issues. This paper illustrates the potential contribution of bespoke classifications to evidence-based policy, and the likely benefits of combining the most appropriate methods, techniques, datasets and practices that are used in the public and private sectors. It is simplistic to think of the impacts of new information and communication technologies (ICTs) in terms of a single, or even small number of, 'digital divides'. As developments in what has been termed the ?e-society? reach wider and more generalisedaudiences, so it becomes appropriate to think of digital media as having wider-rangingbut differentiated impacts upon consumer transactions, information gathering and citizen participation. This paper describes the development of a detailed, nationwide household classification based on levels of awareness of different ICTs; levels of use of ICTs; and their perceived impacts upon human capital formation and the quality of life. It discusses how geodemographic classification makes it possible to provide context for detailed case studies, and hence identify how policy might best improve both the quality and degree of society?s access to ICTs. The primary focus of the paper is methodological, but it also illustrates how the classification may be used to investigate a range of regional and subregional policy issues. This paper illustrates the potential contribution of bespoke classifications to evidence-based policy, and the likely benefits of combining the most appropriate methods, techniques, datasets and practices that are used in the public and private sectors
The effect of precast concrete planks on shear connector strength
No full textThe use of precast concrete planks as permanent shutters reduces the effective in situ concrete around the shear connectors in composite beams. Results are presented which show that a minimum 100 mm width of in situ concrete allows 19 mm diameter, 115 mm long studs to develop their full shear capacity provided recommended reinforcement details are used.<br/
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cure if you can, alleviate if you cannot
No full textColor painting on canvas 61 cm x 51 cm
With the words:
Cure if you can, alleviate if you cannot. Always comfort & support. ... but Never, EVER take away hope. - Dr. Michael A Chizner, M.D.
Submitted by Joy Haeshin Kang & Terry Moy-Brown D.O.\u27s c/o \u2709
Art by HAMMO DO c/o \u2709https://nsuworks.nova.edu/hpd_lib_images_artwork/1015/thumbnail.jp
Indentation and imprint mapping for the identification of material properties in multi-layered systems
No full textMulti-layered thin films have become popular thanks to their ability to enhance the performance, stiffness and strength of a component. In order to verify that the above properties are achieved in a production process, it is necessary to have reliable techniques to measure the mechanical parameters of such systems. Indentation tests are frequently employed for the identification of material parameters at different scales. In this context, this paper presents an inverse analysis technique which combines the indentation curve with the imprint geometry for the identification of the mechanical parameters of two alternating elasto-plastic hardening materials placed through the thickness of multi-layered systems. Three indentation-based inverse analysis methodologies are proposed for the identification of the sought material properties. Inverse analysis procedure consists of a batch, deterministic approach, and conventional optimization algorithms are employed for the minimization of the discrepancy norm. Extensive numerical computations have been performed in order to test the performance of the proposed methodologies in terms of result accuracy and computational effort
Identification of the material properties of Al 2024 alloy by means of inverse analysis and indentation tests
No full textThis paper outlines an inverse analysis approach aimed at the identification of the mechanical properties of metallic materials based on the experimental results obtained from indentation tests. Previous work has shown the ill-posed nature of the inverse problem based on the load-penetration curve when dealing with mystical materials, which exhibit identical indentation curves even if possessing different yield and strain-hardening properties. For this reason, an additional measurement is used in the present study as input for the inverse analysis which consists of the maximum pile-up height measured after the indentation test. This approach lends itself for practical applications as the load-penetration curve can be easily obtained from commonly available micro-indenters while the pile-up present at the end of the test can be measured by different instruments depending on the size of the indented area, for example by means of an atomic force microscope or a laser profilometer. The inverse analysis procedure consists of a batch deterministic approach, and conventional optimization algorithms are employed for the minimization of the discrepancy norm. The first part of the paper outlines how the inclusion of both the maximum height of the pile-up and the indentation curve in the input data of the inverse analysis leads to a well-defined inverse problem using parameters of mystical materials. The approach is then applied to real experimental data obtained from three sets of 2024 Al alloy samples prepared using different age-hardening treatments. The accuracy of the identification process is validated against the mechanical properties obtained independently from standard tensile coupon tests. The reported results highlight the advantages of the proposed methodology in identifying the elastic modulus, yield stress and strain-hardening coefficient while minimizing the amount of information required to be collected from the experimental indentation tests
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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