1,720,955 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Creating a computer game in Godot development environment
No full textTema ovog završnog rada je razvoj platformer igrice u razvojnom okruženju Godot, što obuhvaća opis procesa izrade video igrice, implementacije elemenata videoigre i prikaz videoigre. Pokazano je kako odabrati dobru Godot verziju, kako napraviti novi projekt, struktura najbitnijih scena. Također su objašnjene skripte u projektu i kako one međusobno komuniciraju. Čitatelji ovog završnog rada bi trebali steći potrebno znanje za razvoj slične platformer igrice.The topic of this undergraduate thesis is the development of a platformer game in the Godot engine, which includes a description of the process of creating a video game, implementing game elements, and showcasing the game. It demonstrates how to choose the appropriate Godot version, how to create a new project, and the structure of the most important scenes. Additionally, the project's scripts and how they interact with each other are explained. Readers of this undergraduate thesis should gain the necessary knowledge to develop a similar platformer game
Creating a computer game in Godot development environment
No full textTema ovog završnog rada je razvoj platformer igrice u razvojnom okruženju Godot, što obuhvaća opis procesa izrade video igrice, implementacije elemenata videoigre i prikaz videoigre. Pokazano je kako odabrati dobru Godot verziju, kako napraviti novi projekt, struktura najbitnijih scena. Također su objašnjene skripte u projektu i kako one međusobno komuniciraju. Čitatelji ovog završnog rada bi trebali steći potrebno znanje za razvoj slične platformer igrice.The topic of this undergraduate thesis is the development of a platformer game in the Godot engine, which includes a description of the process of creating a video game, implementing game elements, and showcasing the game. It demonstrates how to choose the appropriate Godot version, how to create a new project, and the structure of the most important scenes. Additionally, the project's scripts and how they interact with each other are explained. Readers of this undergraduate thesis should gain the necessary knowledge to develop a similar platformer game
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
The influence of polymer type and process parameters on the properties of nifedipine solid dispersions produced by hot-melt extrusion
No full textIzboljšanje biološke uporabnosti slabo vodotopnih učinkovin je eden izmed poglavitnih
izzivov sodobne farmacije. To lahko dosežemo na več načinov, med drugim tudi s pretvorbo
učinkovine iz kristalne v amorfno obliko oz. tvorbo amorfne trdne disperzije. Gre za
enofazni sistem, sestavljen iz molekul slabo vodotopne zdravilne učinkovine, razpršene ali
raztopljene v enem ali več polimernih nosilcev. Tvorba amorfnih trdnih disperzij je
pomembna predvsem iz vidika topnosti in večje biološke uporabnosti, saj med raztapljanjem
omogočajo začasno višjo koncentracijo zdravilne učinkovine. Ena izmed najučinkovitejših
tehnologij za pripravo trdne disperzije je iztiskanje talin.
Cilj magistrske naloge je bil z variiranjem procesnih parametrov iztiskanja talin pripraviti
popolnoma amorfno trdno disperzijo z visokim deležem nifedipina (49,5 %) in Soluplusom®
ali Kollidonom® VA64 kot polimernim nosilcem. V programu Umetrics MODDE® smo
pripravil štiri eksperimentalne načrte in rezultate statistično obdelali. Raziskali smo kako
variiranje procesnih parametrov vpliva na odstotek kristala, vsebnost in hitrost sproščanja
učinkovine v pripravljeni amorfni trdni disperziji.
Ugotovili smo, da pri konstantni temperaturi cevi in hitrosti obratov vijakov ekstruderja ni
zaznati pomembnega vpliva hitrosti doziranja materiala na delež rezidualnega kristala. Pri
višjih temperaturah procesa (v režimu mešanja) preostali parametri iztiskanja nimajo vpliva
na učinkovitost tvorbe amorfne trdne disperzije. Pri nižjih temperaturah procesa (v režimu
topnosti) smo se tališču učinkovine približali z dovajanjem mehanske energije. Ta je odvisna
tako od temperature cevi (preko navora) kot tudi od hitrosti obratov vijakov in hitrosti
dovajanja materiala v ekstruder. Dokazali smo, da z variiranjem procesnih parametrov lahko
uspešno pridobimo enofazni in dobro mešljiv sistem, pri čemer se amorfni nifedipin uspešno
razprši v polimernem nosilcu, ter ni zaznati rezidualne kristalinične učinkovine. Statistični
modeli so pokazali, da imata višja temperatura ekstruzijske cevi in višji obrati vijakov
negativen vpliv na delež rezidualnega kristala. Po drugi strani variiranje procesnih
parametrov ni vplivalo na vsebnost učinkovine. Ta je ostala stabilna pri vseh kombinacijah
procesnih parametrov. Izbrana metoda sproščanja se je izkazala kot manj primerna za
preučevanje hitrosti in odstotka sproščene učinkovine, zato rezultatov te metode ni bilo
mogoče povezati s stopnjo kristaliničnosti. Izkazalo se je, da je učinkovina bolj topna v
Kollidonu® VA64, saj je bil delež rezidualnega kristala nižji v primerjavi z vzorci izdelanimi
pri enakih parametrih iztiskanja ob uporabi Soluplusa® kot polimernega nosilca.Improvement of the bioavailability of poorly water-soluble active ingredients is one of the
main challenges in modern pharmacy. This can be achieved with different approaches, one
being by converting the active ingredient from its crystalline to amorphous form, thus
forming an amorphous solid dispersion. This is a single-phase system composed of
molecules of poorly water-soluble active ingredients dispersed or dissolved in one or more
polymeric carriers. The formation of amorphous solid dispersions is particularly important
in terms of solubility and improved bioavailability, as they enable temporarily increased
concentration of the active ingredient during dissolution. One of the most effective
technologies for the preparation of solid dispersions is hot-melt extrusion.
The aim of this master\u27s thesis was to prepare a completely amorphous solid dispersion with
a high percentage of nifedipine (49.5%) and Soluplus® or Kollidon® VA64 as the polymeric
carrier, by varying the process parameters. In the Umetrics MODDE® program we prepared
four experimental designs and presented the results through statistical models. We
investigated how the variation of process parameters affects residual crystallinity, content,
and release rate of the active ingredient in the prepared amorphous solid dispersion.
The results showed that with constant barrel temperature and screw speed, no significant
effect of material feed rate on the percentage of residual crystal was observed. At higher
process temperatures (in the miscibility regime) remaining extrusion parameters had no
effect on the ability to form an amorphous solid dispersion. At lower process temperatures
(in the solubility regime) we approached the melting point of the active ingredient by
applying mechanical energy, which depended on both the barrel temperature (via torque)
and screw speed as well as the material feed rate. We proved that by varying the process
parameters, we can successfully obtain a single-phase and well-miscible system, in which
amorphous nifedipine is effectively dispersed in the polymeric carrier, with no detectable
residual crystal. Statistical models showed that higher barrel temperatures and screw speeds
reduced the percentage of residual crystal. On the other hand, varying process parameters
did not affect the active ingredient content which remained stable across all combinations of
process parameters. The chosen release method was not suitable for studying the release rate
and percentage of released active ingredient. Consequently the results could not be linked to
the residual crystallinity. It was found that the active substance was more soluble in
Kollidon® VA64, as the residual crystal content was lower compared to samples made with
Soluplus® as the polymeric carrier under the same extrusion parameters
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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