1,720,956 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
Gases and the gas laws
No full textIako su na prvi pogled jednostavni i po svojoj strukturi i za opisati, plinovi su izuzetno važni. Život na Zemlji se velikim djelom odvija u zraku, čije lokane promjene nazivamo "vremenom". U ovom radu opisani su plinovi, najjednostavniji oblik materije. Opisani su i pokusi koji su doveli do ideje o idealnom plinu i jednadžbi stanja idealnog plina i kako se te ideje lagano mogu proširiti na smjese. Zamišljanje plina kao skupa čestica koje se nasumično gibaju daje objašnjenje zakona idealnog plina. No, taj zakon samo približno vrijedi za realne plinove pa je u ovom radu također opisano zašto se realni plinovi ponašaju drugačije.Although, at first glance they seem simple for their structure and for description, gases are very important. Life on Earth would be unimaginable without air. This undergraduate thesis describes gases, the simplest form of matter. Experiments that led to idea of ideal gas and ideal gas equation and how easily those ideas can be applied on gas mixtures. As we imagine gases as complex of particles which randomly move gives the explanation of the law of ideal gas. However, this law is just about true for real gases, so in this paper it is also described how real gases behave differently
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
Physiological condition of dandelion (Taraxacum officinale Weber) in rural areas assessed by biochemical parameters
No full textMaslačak (Taraxacum officinale Weber) je samonikla biljna vrsta sjeverne polutke. Zbog visoke sposobnosti akumulacije kemijskih elemenata, ispunjava sve uvjete za ispitivanje utjecaja zagađenja te se smatra dobrim bioindikatorom. U ovom radu opisano je istraživanje utjecaja poljoprivrednog zagađenja na biokemijske parametre maslačka što uključuje koncentraciju proteina, klorofila i karotenoida, sadržaj askorbinske kiseline i ukupnih topivih polifenola. Povećana koncentracija proteina u uzorcima prikupljenim na zagađenim lokacijama bila je popraćena smanjenjem ukupnih topivih polifenola i askorbinske kiseline te koncentracije karotenoida i
klorofila. Nadalje, došlo je do povećanja ukupne antioksidativne aktivnosti kod uzoraka prikupljenih na zagađenim lokacijama. Metode analize glavnih komponenata i infracrvene spektroskopije Fourierovim transformacijama (FTIR) potvrdile su razlike rezultata dobivenih biokemijskim analizama. To ukazuje da su poljoprivredni zagađivači negativno utjecali na produkciju sekundarnih metabolita unatoč dobrom fiziološkom odgovoru te je maslačak pogodna biljna vrsta za ispitivanje utjecaja poljoprivrednog zagađenja i abiotičkog stresa.Dandelion (Taraxacum officinale Weber) is a wild plant species of the northern hemisphere. Due to its high ability to accumulate chemical elements, it is a good species for the investigation of the impact of pollution and is considered a good bioindicator. This paper describes the impact of agricultural pollution on the biochemical parameters of dandelion, which include the concentration of proteins, chlorophyll and carotenoids, the content of ascorbic acid and total soluble polyphenolics. The increased protein concentration in samples collected at contaminated areas was accompanied by a decrease in total soluble polyphenolics, ascorbic acid, carotenoid and chlorophyll concentrations. Furthermore, there was a significant increase in total antioxidant activity in samples collected at contaminated sites. The principal component analysis and Fourier transform infrared spectroscopy (FT-IR) confirmed the differences in the results obtained by biochemical analyses. This indicates that agricultural pollutants have negatively affected the production of secondary metabolites despite the good physiological condition of the plants and that a dandelion is a suitable plant species for investigation of the impact of agricultural pollution and abiotic stress
Gases and the gas laws
Get PDFIako su na prvi pogled jednostavni i po svojoj strukturi i za opisati, plinovi su izuzetno važni. Život na Zemlji se velikim djelom odvija u zraku, čije lokane promjene nazivamo „vremenom“. U ovom radu opisani su plinovi, najjednostavniji oblik materije. Opisani su i pokusi koji su doveli do ideje o idealnom plinu i jednadžbi stanja idealnog plina i kako se te ideje lagano mogu proširiti na smjese. Zamišljanje plina kao skupa čestica koje se nasumično gibaju daje objašnjenje zakona idealnog plina. No, taj zakon samo približno vrijedi za realne plinove pa je u ovom radu također opisano zašto se realni plinovi ponašaju drugačije.Although, at first glance they seem simple for their structure and for description, gases are very important. Life on Earth would be unimaginable without air. This undergraduate thesis describes gases, the simplest form of matter. Experiments that led to idea of ideal gas and ideal gas equation and how easily those ideas can be applied on gas mixtures. As we imagine gases as complex of particles which randomly move gives the explanation of the law of ideal gas. However, this law is just about true for real gases, so in this paper it is also described how real gases behave differently
Physiological condition of dandelion (Taraxacum officinale Weber) in rural areas assessed by biochemical parameters
No full textMaslačak (Taraxacum officinale Weber) je samonikla biljna vrsta sjeverne polutke. Zbog visoke sposobnosti akumulacije kemijskih elemenata, ispunjava sve uvjete za ispitivanje utjecaja zagađenja te se smatra dobrim bioindikatorom. U ovom radu opisano je istraživanje utjecaja poljoprivrednog zagađenja na biokemijske parametre maslačka što uključuje koncentraciju proteina, klorofila i karotenoida, sadržaj askorbinske kiseline i ukupnih topivih polifenola. Povećana koncentracija proteina u uzorcima prikupljenim na zagađenim lokacijama bila je popraćena smanjenjem ukupnih topivih polifenola i askorbinske kiseline te koncentracije karotenoida i klorofila. Nadalje, došlo je do povećanja ukupne antioksidativne aktivnosti kod uzoraka prikupljenih na zagađenim lokacijama. Metode analize glavnih komponenata i infracrvene spektroskopije Fourierovim transformacijama (FTIR) potvrdile su razlike rezultata dobivenih biokemijskim analizama. To ukazuje da su poljoprivredni zagađivači negativno utjecali na produkciju sekundarnih metabolita unatoč dobrom fiziološkom odgovoru te je maslačak pogodna biljna vrsta za ispitivanje utjecaja poljoprivrednog zagađenja i abiotičkog stresa.Dandelion (Taraxacum officinale Weber) is a wild plant species of the northern hemisphere. Due to its high ability to accumulate chemical elements, it is a good species for the investigation of the impact of pollution and is considered a good bioindicator. This paper describes the impact of agricultural pollution on the biochemical parameters of dandelion, which include the concentration of proteins, chlorophyll and carotenoids, the content of ascorbic acid and total soluble polyphenolics. The increased protein concentration in samples collected at contaminated areas was accompanied by a decrease in total soluble polyphenolics, ascorbic acid, carotenoid and chlorophyll concentrations. Furthermore, there was a significant increase in total antioxidant activity in samples collected at contaminated sites. The principal component analysis and Fourier transform infrared spectroscopy (FT-IR) confirmed the differences in the results obtained by biochemical analyses. This indicates that agricultural pollutants have negatively affected the production of secondary metabolites despite the good physiological condition of the plants and that a dandelion is a suitable plant species for investigation of the impact of agricultural pollution and abiotic stress
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