1,720,994 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Reološka svojstva prosenog testa pripremljenog sa različitim proteinima
Full text linkMillet (Panicum miliaceum L.) flour represents potential raw material for the production of gluten-free products. Since bread of satisfactory quality cannot be produced using pure millet flour, various structuring agents are used to improve its textural properties, such as different hydrocolloids, starches and proteins. Proteins from different sources have been chosen for this study because they are not considered as additives (do not possess E-number). Additionally, they improve nutritional profile of millet bread since millet flour has low protein content.
Four types of proteins were used for the production of millet bread: pea protein concentrate, rice protein concentrate, pumpkin oil cake protein isolate and whey protein concentrate. Bread formulation consisted of millet flour, sugar, yeast, salt and water (110 % of hydration on the millet flour basis). Proteins were used to substitute 10 % of millet flour in bread formulation. Dough prepared without addition of yeast was used for the determination of rheological properties to avoid their change during fermentation. Small deformation dynamic oscillatory measurements of doughs were performed using a Haake MARS rheometer (Thermo Scientific, Karlsruhe, Germany) at temperature of 25 °C, equipped with a parallel plate geometry PP60 (60 mm diameter and 1 mm gap). Dough was left to rest 300 s before measurement. Frequency sweep (mechanical spectrum) was recorded over the range of 0.1 - 10 Hz at 0.1 Pa stress, which was within the linear viscoelastic region as previously determined by stress sweep test.Proseno (Panicum miliaceum L.) brašno predstavlja potencijalnu sirovinu za proizvodnju bezglutenskih proizvoda. Pošto je nemoguće proizvesti hleb zadovoljavajućeg kvaliteta od čistog prosenog brašna, koriste se različiti agensi za poboljšanje njegovih teksturnih svojstava, kao što su različiti hidrokoloidi, skrobovi i proteini. Proteini iz različitih izvora odabrani su za ovu studiju zato što se ne smatraju aditivima (nemaju E-broj). Pored toga, proteini poboljšavaju nutritivni profil prosenog hleba jer proseno brašno ima nizak sadržaj proteina.
Četiri vrste proteina korišćene su u proizvodnji prosenog hleba: koncentrat proteina graška, koncentrat proteina pirinča, izolat proteina uljane pogače bundeve i koncentrat proteina surutke. Formulacija hleba sastojala se od prosenog brašna, šećera, kvasca, soli i vode (110% hidratacije na bazu prosenog brašna). Proteini su korišćeni za supstituciju 10% prosenog brašna u formulaciji hleba. Testo pripremljeno bez dodatka kvasca korišćeno je za određivanje reoloških svojstava da bi se izbegle promene prilikom fermentacije. Dinamička oscilatorna merenja pri malim deformacijama izvedena su korišćenjem Haake MARS reometra (Thermo Scientific, Karlsruhe, Germany) na temperaturi od 25°C, uz upotrebu pribora tipa ploča-ploča PP60 (60 mm prečnik ploče i 1 mm zazor između ploča). Testo je ostavljeno da odmara 300 s pre merenja. Test pri promeni frekvencije (mehanički spektar) je snimljen u opsegu frekvencija od 0,1 do 10 Hz pri naponu smicanja od 0,1 Pa, za koji je prethodno utvrđeno u testu sa promenom napona de se nalazi unutar viskoelastičnog
područja
Variability of the number and weight of 1000 seeds of weeds present in alfalfa natural seeds from different locations in Serbia
Full text linkAlfalfa is the most significant perennial and multi-crop forage legume in Serbia. Seed production has numerous problems, which
causes high variability in seed yield. One of the problems in this production is the weed seeds that are in the natural alfalfa seed after
harvesting. Minimum purity must be greater than 95 %, up to 2 % of other species are allowed, and up to 0.5 % of weeds, but no
quarantine weeds such as dodder (Cuscuta.sp). Weed seeds were detected in natural alfalfa seeds: Sinapis arvensis L., Amaranthus
retroflexus L., Rumex obtusifolius, L., Cuscuta campestris Yunk., Rumex acetosella L., Plantago lanceolata L., Plantago major L.,
Rumex crispus L., Galium aparine L., Convolvus arvensis L. as expected, the variability of the number of weed seeds detected from
the seed lots over three years was high: CV% = 14.78 for wild sorghum – S. halepense (L.) Pers. In the 2022, to CV% = 65.47 for
ribwort plantain – Plantago lanceolata L. in the 2020. For the weight of 1000 seeds of the examined weeds, the variability was
determined from CV% = 5.869 for the ribwort plantain – Plantago lanceolata L. (year 2020), to CV% = 34.41 for yellow dock –
Rumex crispus L. (year 2022).Lucerka je naznačajnija višegodišnja i višeotkosna krmna leguminoza u Srbiji. Proizvodnja semena je sa brojnim problemima što
uzrokuje visoku varijabilnost za prinos. Jedan od problema u ovoj proizvodnji čine i semena korova koja se nakon ubiranja nalaze u
naturalnom semenu lucerke. Na drugoj strani za stavljanje semena u promet minimalna čistoća semena mora da bude viša od 95 %.
Dozvoljeno je do 2 % drugih vrsta i do 0.5 % korova, ali u semenu lucerke ne smeju da budu prisutni karantinski korovi kao što su:
vilina kosica (Cuscuta spp.). U ovim istraživanjima su predstavljeni rezultati varijabilnosti broja semena i mase 1000 semena
detektovanih korova u naturalnom semenu pet partija semena lucerke sa različitih lokaliteta u Srbiji, tokom tri godine. U naturalnom
semenu lucerke je detektovano seme sledećih korova: Sinapis arvensis L., Amaranthus retroflexus L., Rumex obtusifolius L., Cuscuta
campestris Yunk., Rumex acetosella L., Plantago lanceolata L., Plantago major L., Rumex crispus L., Galium aparine L., Convolvus
arvensis L. Varijabilnost broja semena detektovanih korova bila je visoka za divlji sirak- Sorghum halepense. (L.) Pers. (CV% =
14.78 u 2022.), do CV% = 65.47 za uskolisnu bokvicu - Plantago lanceolata L. u 2020. godini. i za masu 1000 semena od CV% =
5.86 Plantago lanceolata L. (2020.), do CV% = 34.41 za Rumex crispus L. (2022.
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Risk assessment on pig farms and interaction of CCP and frequency Rattus norvegicus
No full textRisk assessment on pig farms aims to determine the presence, spreading and influence of Rattus
norvegicus on pig health, identifying certain important points in the technological process and on
different locations designated as CCPs. Thresholds in assessment criteria are defined for these
points, considering animal welfare and initial rodent control data. Gray rat (Rattus norvegicus), is
a synanthropic rodent species and a regular inhabitant of pig housing facilities. The present study
assessed animal health risks, and identified critical control points (CCPs) in production facilities.
The criteria for risk assessment were: pig feeding and watering, maintenance, animal health,
behaviour and risk assessment records.
The results show a close association between the number of identified CCPs and the number of
trapped animals (20 CCPs and 29 trapped rats in facility A, and 9 CCPs and 7 rats in facility B).April 07th – 12th, 2019, Kladovo, Serbi
Assessment of grain oil content stability in early maturing soybean genotypes
Full text linkin the grain. The processing industry, as well as individual agricultural producers, pays special attention
to these two parameters, setting requirements for varieties with high oil content for industrial
processing, or varieties with high protein content for animal feed. Therefore, breeding practice is aimed
at developing varieties not only of high yield but also varieties of improved grain quality. Soybean
genotypes maintained in the collection of the Maize Research Institute Zemun Polje are characterized
by a protein content ranging from 36.3% to 43.2%, and an oil content ranging from 15.6% to 22.0%.
Both traits are of a complex quantitative nature, determined both by genetic factors and the influence of
environmental conditions during their accumulation in the grain, as well as the interaction of genotype
and environment.
The aim of this study was to examine the value of genotype × environment interaction for oil content in
soybean genotypes from the collection of Maize Research Institute Zemun Polje and to identify stable
sources that can be utilized as starting material for breeding for oil content.
The experiment included 14 genotypes of soybean from maturity group 00 (very early varieties). The
field trials were set up over two years, at two locations (Zemun Polje and Pancevo), according to a
completely randomized block design with three replications. After harvest, the oil content in the grain
was measured on a NIRT device "Infraneo", Chopin Technologies. The linear-bilinear AMMI-1 model
was applied to analyze the genotype × environment interaction for grain oil content.
A large part of the variation (80.91%) of the genotype × environment interaction for the grain oil
content in soybean genotypes was explained by the first interaction axis of the AMMI-1 model. The
differences in the main effects of the examined environments were not large, since all environments
had a value of oil content close to the general average.
Four environments had a variable influence on the examined genotypes. For both locations, a positive
interaction effect was found in 2012 and a negative interaction effect in 2011, with the genotypes tested
in Zemun Polje in 2012 being the most unstable, while the genotypes tested in 2011 showed
approximately equal stability at both locations.
A number of genotypes (Canatto, Kabott, Olima, Gi 291 / 70-79, Krajina, Agassiz, Maple Presto and
Luso) were distributed close to the stability line. Genotypes with above the average oil content and
high stability (Maple Presto and Ljuso) deserved special attention, as well as the Agassiz genotype,
which had the maximum average value of this parameter, and a small value of interaction with
environments. Genotypes of low average values of oil content (Mini Soybeans and Progress) had very
poor stability, which can be attributed to their divergent germplasm and specific response to
environmental conditions that differ from the conditions in the region of their origin.Prerađivačka industrija kao i individualni poljoprivredni proizvođači obraćaju posebnu pažnju na ova
dva parametra, postavljajući zahteve za sortama visokog sadržaja ulja za industrijsku preradu, ili
sortama visokog sadržaja proteina za dobijanje stočne hrane. Stoga je selekcionerski rad usmeren je ka
stvaranju sorti ne samo visokog prinosa već i sorti poboljšanog kvaliteta zrna. Genotipovi soje koji se
čuvaju u kolekciji Instituta za kukuruz Zemun Polje odlikuju se sadržajem proteina koji varira od
36.3% do 43.2%, i sadržajem ulja u rasponu od 15.6% do22.0%. Oba svojstva su kompleksne
kvantitativne prirode, determinisana kako naslednim faktorima tako i uticajem uslova spoljašnje
sredine u vreme njihove akumulacije u zrnu, kao i interakcijom genotipa i spoljašnje sredine.
Cilj ovog rada bio je da se ispita vrednost interakcije genotip × spoljašnja sredina za sadržaj ulja kod
genotipova soje iz kolekcije Instituta za kukuruz Zemun Polje i otkriju stabilni izvori koji mogu
poslužiti kao početni materijal za oplemenjivanje na sadržaj ulja.
Eksperimentom je obuhvaćeno 14 genotipova soje grupe zrenja 00 (veoma rane sorte). Ogledi su
postavljeni u toku dve godine, na dve lokacije (Zemun Polje i Pančevo), po potpuno slučajnom blok
dizajnu u tri ponavljanja. Nakon žetve, sadržaj ulja u semenu izmeren je na uređaju NIRT tehnologije
„Infraneo“, Chopin Technologies. Za analizu interakcije genotipa i spoljašnje sredine za sadržaj ulja u
zrnu primenjen je linearno-bilinearni AMMI-1 model.
Veliki deo varijacije (80,91%) interakcije genotipa i spoljašnje sredine za sadržaj ulja u zrnu ispitivanih
genotipova soje objašnjen je prvom interakcijskom osom AMMI-1 modela. Razlike u glavnim efektima
ispitivanih spoljašnjih sredina nisu bile velike, s obzirom da su sve sredine imale vrednost sadržaja ulja
blizu opšteg proseka.
Četiri spoljašnje sredine imale su varijabilan uticaj na ispitivane genotipove. Za oba lokaliteta utvrđen
je pozitivan interakcijski efekat u 2012. i negativan interakcijski efekat u 2011. godini, pri čemu su
genotipovi ispitivani u Zemun Polju 2012. godine bili najnestabilniji, dok su genotipovi ispitivani u
toku 2011. godine pokazali približno jednaku stabilnost na obe lokacije
Veći broj genotipova (Canatto, Kabott, Olima, Gi 291/70-79, Krajina, Agassiz, Maple Presto i Ljuso)
bio je raspoređen blizu linije stabilnosti, pri čemu posebnu pažnju zaslužuju genotipovi iznad posečnog
sadržaja ulja i visoke stabilnosti (Maple Presto i Ljuso) kao i genotip Agassiz, koji je imao maksimalnu
prosečnu vrednost ovog parametra, i malu vrednost interakcije sa spoljašnjim sredinama. Genotipovi
niskih prosečnih vrednosti sadržaja ulja (Mini Soja i Progres) imali su veoma slabu stabilnost, što se
može pripisati njihovoj divergentnoj germplazmi i specifičnoj reakciji na uslove ispitivanja koji se
razlikuju u odnosu na uslove regiona u kojem su ove sorte selekcionisane
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