1,720,955 research outputs found
Wood formation in grapevine (Vitis vinifera) drom a drought-prone environment in the area of Naples in Italy
No full textS pomočjo orodja Trephor smo na vinorodnih območjih v bližini Neaplja v južni Italiji, v obdobju od 23. februarja do 31. avgusta 2022, odvzeli približno 200 mikroizvrtkov iz stebel vinske trte (Vitis vinifera). Vzorčili smo na treh področjih z različno tretiranimi podlagami: naravno brez posega (NAT), sejanje drugih rastlin (trav) pod trto (SEM) in
obdelano z zasipanjem trte z zemljino (LAV). Iz mikro izvrtkov smo pripravili mikroskopske preparate, ki so vsebovali floem, kambij in les. Prečne prereze tkiv vinske trte smo preučili s svetlobnim mikroskopom Zeiss Axio Imager 2 in programom za analizo sliko ZEN Pro 3.3. Spremljali smo število celic v kambiju, nastajanje lesa (postkambijalno rast, odlaganje in lignifikacijo celičnih sten in zrele celice). Pridobljene podatke smo analizirali. Upoštevajoč klimatske pogoje smo poiskali zvezo med nastajanjem lesa in kultivacijo (tretiranje tal) pri vinski trti. Kambijeva aktivnost se je na SEM in NAT pričela 3. maja 2022, na LAV pa v sredini maja. Diferenciacija celic lesa, trahej in vlaken je bila zaključena 31. avgusta 2022. Povprečna širina branik v lesu vinske trte nastalih v letu 2022 je bila 1119,24 μm (LAV), 775,79 μm (SEM) in 654,6 μm (NAT). Povprečne temperatura v letu 2022 je bila 15,12 °C, letna količina padavin pa 1191,8 mm.Using the Trephor tool, approximately 200 micro-cores were collected from grapevine (Vitis vinifera) stems in vineyards near Naples in southern Italy between February 23 and August 31, 2022. Samples were collected in three areas with different treated rootstocks: natural without intervention (NAT), sowing of other plants under the vine
(different grass species) (SEM), and treated vines with soil amendment (LAV). Microscopic slides were made from the micro-cores. They contained phloem, cambium and wood. Cross sections of the tissue were examined using a Zeiss Axio Imager 2 light microscope and the ZEN Pro 3.3 image analysis software. The number of cells in the cambium and wood formation phases (zones with cells in the stages of post-cambial growth, cell wall deposition and lignification, and maturation) were measured. The data obtained were analysed and the relationships between wood formation and cultivation (soil treatment) were assessed, taking into account climatic conditions. Cambium activity started on May 3, 2022 in SEM and NAT and in mid-May in LAV. All vessels and fibres were fully differentiated by August 31. The average width of tree rings in 2022 was 1119.24 μm (LAV), 775.79 μm (SEM), and 654.6 μm (NAT). In 2022, the average annual temperature was 15.12 °C and the total precipitation was 1191.8 mm
Dendrochronological analysis and identification of wooden elements of Idrija Miner’s House and Idrija “Kamšt”
No full textIdrija je znana po rudniku živega srebra, ki je bil gonilo za razvoj mesta, okoliša in dvig kvalitete življenja tedanjih prebivalcev. V času delovanja rudnika je bil les izrednega pomena, tako za vzpostavitev rudniškega kompleksa, kot tudi zunanje infrastrukture in gradnjo bivališč. Po pregledu ohranjene literature in potencialnih stavb, smo se odločili, da bomo izvedli dendrokronološke raziskave na dveh objektih – na tipični idrijski rudarski hiši in na kamšti, črpalki za vodo na vodni pogon. Opravili smo terensko vzorčenje lesa, na katerem smo nato v laboratoriju izvedli identifikacije lesnih vrst in opravili meritve širin branik za dendrokronološke analize. Iz meritev smo konstruirali kronologije objektov in jih datirali s pomočjo referenčnih kronologij Katedre za tehnologijo lesa. Raziskani les je pretežno predstavljal les bele jelke (Abies alba), samo en vzorec iz rudarske hiše je bil iz lesa navadne smreke (Picea abies). Idrijsko rudarsko hišo in njeno izgradnjo, smo na podlagi datacij elementov z zadnjo braniko pod skorjo (1602 do 1699) umestili v 17. stoletje. Les kamšti na podlagi datacij konstrukcijskih elementov brez zadnje branike pod skorjo umeščamo v obdobje po letu 1923. Rezultati kažejo, da je na kamšti danes prisotno zelo malo originalnega lesa, saj je delovala kar 150 let in je bila zaradi tega nenehno izpostavljena obrabi in mehanskim poškodbam.Idrija is known for its mercury mine. The mine was a driver for the development of the city and its surroundings, and raising the quality of life of the then inhabitants. At that time, wood was extremely important, both for the establishment of the mining complex, as well as the external infrastructure and housing construction. Based on a review of the preserved literature and potential research locations, we decided to perform a dendrochronological analysis on a typical Idrija\u27s miners house and on a ˝kamšt˝, a water-powered water pump. We performed field sampling of wood, on which we then performed identifications of wood species in the laboratory and performed measurements of the growth ring widths for dendrochronological analysis. Based on the results, we constructed chronologies of buildings and dated them with the help of reference chronologies from the Chair for Wood Science. Most analysed samples were identified as silver fir wood (Abies alba), and only one sample was identified as Norway spruce (Picea abies). Based on the dating of the construction elements with waney edge (1602 do 1699) we placed the Idrija Mining House in the 17th Century. The dating results for the dated elements without waney edge place the ˝kamšt˝ in the period after 1923. We assume that there is not much left of the structure’s original wood, because it has been in operation for 150 years and has been constantly exposed to wear and damage
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
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
