323,568 research outputs found
Cognitive support for older people from multimedia options
No full textIf older users of multimedia displays could select among presentation options, would they choose display combinations that supported their performance? After three short touch-screen tasks which measured the perceptual and cognitive abilities of 50 older adults, they answered questions about a route on an online map that could be accompanied by written and/or spoken text. Half the participants saw animated routes; and they were less accurate answering questions than those who saw static routes but this did not affect people’s multimedia choices which, although diverse, were systematic. Spoken text was more often selected by people who had lower scores on the spatial working memory task, than by the older adults with higher scores. This suggests that older people with cognitive limitations recognise ways in which multimedia information can be supportive
Sistem COBISS v Makedoniji s posebnim poudarkom na izkušnjah katalogizatorjev
No full textThe COBISS system in Macedonia especially cataloguing is one of the key issues in the field of librarianship. The purpose of this master thesis is to improve effectiveness and efficiency in COBISS system in Macedonia from cataloguers\u27 point of view. On the other hand we are trying to determine issues causing difficulties and challenges facing cataloguers with licence in COBISS system in Macedonia. According to the obtained results cataloguers consider that they: are satisfied with module COBISS/Cataloguing and have a positive experience working in this environmentconsider that quality of processed records due to the fact of a good knowledge of cataloguing rules, experience in processing of bibliographic records as well as appropriate formal and informal educationcourses and seminars held in NUL are not sufficient should be with higher quality to offer new contents and more frequenthave difficulties with application and interpretation of traditional cataloguing code. Potential solutions are: construction of a higher-education system in the field of LIS following contemporary trendsintroduction of national cataloguing code harmonized according to the IFLA rules for cataloguingincreasing higher quality control of bibliographic records and greater focus on responsibility and performance of cataloguers.Sistem za vzajemno katalogizacijo COBISS predstavlja v Makedoniji zelo pomembno področje bibliotekarstva. Namen magistrskega dela je izboljšati učinkovitost modula za katalogizacijo na osnovi mnenj katalogizatorjev. Prav tako želimo ugotoviti težave, s katerimi se pri svojem delu srečujejo makedonski katalogizatorji z licenco. S pomočjo anketnega vprašalnika smo ugotovili, da so katalogizatorji zadovoljni z modulom za katalogizacijo in da imajo z njim dobre izkušnje. Zavedajo se tudi pomena kakovosti bibliografskih zapisov, ki je po njihovem mnenju odvisna od poznavanja katalogizacijskih pravil, delovnih izkušenj ter formalne in neformalne izobrazbe. Izobraževanje katalogizatorjev, ki poteka v NUL, ne ustreza tako glede novih vsebin kot glede pogostosti tečajev. Katalogizatorji imajo težave pri uporabi in interpretaciji katalogizacijskega pravilnika. Glede na rezultate raziskave predlagamo sodobnejši univezitetni sistem izbraževanja na področju bibliotekarstva in informacijskih znanosti. Potreben je tudi moderen katalogizacijski pravilnik, ki temelji na Iflinih načelih. Več pozornosti je treba nameniti preverjanju kakovosti bibliografskih zapisov in tudi individulani odgovornosti katalogizatorjev
Repeatability analysis of two methods for height measurements in the micrometer range
No full textA precision study of two height measuring methods is carried out. The first method is based on a White Light Interferometer (WLI) and the second on a Co-ordinate Measuring Machine (CMM) equipped with an optical probe. The height measurements considered are in the range [150; 250] μm. Point and interval estimates of repeatability are reported in the paper. This study presents experimental evidence that, under repeatability conditions, the precision of the WLI method is about five times higher than that of the optical CMM method. Furthermore, the precision of WLI is constant over the investigated height range whereas a dependency of the CMM precision on the nominal dimensions is identified. For both methods a linear relationship is detected between the random error and the sequence in which the measurements are taken
Thin-wall injection molding of polypropylene using molds with different laser-induced periodic surface structures
No full textIn injection molding, high pressure is required to completely replicate the mold geometry, due to the viscosity of thermoplastic polymers, the reduced thickness of the cavity, and the low mold temperature. The reduction of the drag required to fill a thin-wall injection molding cavity can be promoted by inducing the strong slip of the polymer melt over the mold surface, which occurs within the first monolayer of macromolecules adsorbed at the wall. In this work, the effects of different laser-induced periodic surface structures (LIPSS) topographies on the reduction of the melt flow resistance of polypropylene were characterized. Ultrafast laser processing of the mold surface was used to manufacture nano-scale ripples with different orientation and morphology. Moreover, the effects of those injection molding parameters that mostly affect the interaction between the mold surface and the molten polymer were evaluated. The effect of LIPSS on the slip of the polymer melt was modeled to understand the effect of the different treatments on the pressure required to fill the thin-wall cavity. The results show that LIPPS can be used to treat injection mold surfaces to promote the onset of wall slip, thus reducing the injection pressure up to 13%. POLYM. ENG. SCI., 59:1889–1896, 2019. © 2019 Society of Plastics Engineers
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
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
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