322,999 research outputs found
THE ANALYSIS OF THE INFLUENCE OF SOME MORPHOLOGICALLY FUNCTIONAL FEATURES OF CHILDREN 13-15 YEARS OF AGE ON THEIR SUCCESS IN SWIMMING
No full textTema diplomske naloge je ugotoviti, katere morfološke lastnosti se uporabljajo za izbiro mladih plavalcev in kolikšen vpliv imajo na uspeh v plavanju. Že v teoretičnem delu je natančno opisana selekcija mladih športnikov oziroma plavalcev, kdaj se uporablja in kdaj se prične.
Plavalna uspešnost je močno odvisna od lastnosti, ki so v glavnem odvisne od morfoloških značilnosti, hidrostatične lastnosti negibnega telesa, od razmerja med specifično težo telesa in vode, hidrodinamične lastnosti negibnega telesa — drsenje, od čelnega preseka in plovnosti. Predstavili smo dejavnike, ki vplivajo na uspešnost v tekmovalnem plavanju kot so značilnosti, lastnosti in sposobnosti plavalca.
V raziskovalnem delu, smo predstavili rezultate meritev s pomočjo statističnih podatkov plavalcev starih od 13 do 15 let, ki jih je opravljala Fakulteta za šport v Ljubljani. Zanimalo nas je katere morfološke lastnosti so značilne za mlade plavalce in v kolikšni meri vplivajo na uspeh v disciplini 50m kravl. Zbrane podatke smo analizirali in obdelali, tako smo dobili potrditev, da so vsi testi morfoloških značilnosti, ki jih uporabljajo za izbiro mladih plavalcev, odlično sestavljeni.The subject of this work is to establish the morphological properties, which are used by the selection of young swimmers and their influence on the success in swimming. In the theoretical part of the work the selection process of young athletes resp. swimmers is drescibed, when it is used and when it beginns.
Swimming efficciency strongly depends on the properties, which depends on morphological characteristics, hydrostatic property motionless body, relation between the specific body weight and specific weight of the water, on hydrodinamic prperty of motionless body (slithering), front section and body navigability. The introduced factors influence on the efficiency of competitiry swimming such as characteristic, properties and capability of swimmer.
In research part of the present work we introduced the results of the measurments of statistical data of 13 to 15 year old swimmers. The measurements were conducted at the Faculity of sport in Ljubljana. We explored which morphological properties are significant for young swimmers and in which extent they influence on the 50 m crawl discipline efficiency. Collested data we have analyised and processed and gained the conclusion that all tests of morphological characteristis that are used for the selection process of young swimmers are compiled excellent
Structural diversity of forest stands on Pahernik\u27s forest estate
No full textPrimerjali smo rabo zemljišč na katastrskih občinah, na katerih se nahaja Pahernikova posest (Vuhred, Planina, Orlica in Hudi Kot) iz leta 1825 z letom 2017. V vseh analiziranih katastrskih občinah se je delež gozda od 19. do 21. stoletja povečal. Največ se je povečal v katastrski občini Planina in sicer za 46 %. Delež gozda na posesti se je med letoma 1825 in 2014 povečal za 21,4 %. Razlike v sestojnih gostotah in kazalnikih sestojne raznovrstnosti med sestoji, kjer gozd v začetku 19. stoletja ni bil prisoten in sestojih na prvobitnih gozdnih zemljiščih niso statistično značilne. Na celotni posesti znaša lesna zaloga 453,3 m3/ha, v njej prevladuje smreka. Sestojne strukture smo razmejevali na podlagi višinskih pasov s segmentacijo podatkov laserskega skeniranja Slovenije. Višine sestojne strehe in s tem drevesne višine se z večanjem nadmorske višine zmanjšujejo. Fenološke razlike v olistanju prevladujočih drevesnih vrst smo ocenjevali na podlagi satelitskih posnetkov misije Sentinel-2. Ocenjevali smo normirane diferencialne vegetacijske indekse (NDVI) v obdobju od 29. marca do 15. oktobra 2017. Na podlagi razlik v vegetacijskem indeksu NDVI je mogoče ocenjevati fenološki razvoj prevladujočih drevesnih vrst bukve, smreke in macesna v gozdnih sestojih.We compared land use in cadastral municipalities where Pahernik property is located (Vuhred, Planina, Orlica and Hudi kot) in year 1825, with land use from year 2017. In all of the analyzed cadastral municipalities, forest area share in land cover grew in the period from 19th to 21st century. We recorded the biggest rise of forest area share in cadastral municipality Planina, specifically 46 %. Forest cover increased for 21 % between 1825 and 2014 on Pahernik property as a whole. Differences in stand densities and in stand diversity indices between the stands where forest was not present in 19th century and the stands on persistent forested lands, were not statistically significant. Average stand volume on Pahernik property is 453,3 m3/ha, spruce is the prevailing species. We delineated stand structures based on height classes, based on segmentation of the data collected with laser scanning of Slovenia. Stand canopy heights and tree heights are decreasing with rising elevation. We estimated leaf-out phenological differences of dominant tree species based on mission Sentinel-2 satellite images. We estimated Normalized Difference Vegetation Indexes (NDVI) in the period between 29th of March and 15th of October 2017. Based on the differences in vegetation indices NDVI, it is possible to estimate phenological development of forest stands for dominant tree species beech, spruce and larch
Structural diversity of forest stands on Pahernik\u27s forest estate
No full textNa Pahernikovi gozdni posesti je mogoče spremljati učinke in uspešnost vsaj polstoletnega gospodarjenja z raznomernimi gozdovi. Na podlagi podatkov kontrolne vzorčne metode in laserskega skeniranja Slovenije smo ocenjevali strukturno pestrost gozdnih sestojev s kazalniki in indeksi sestojnih gostot, vrstne in strukturne pestrosti debelinskih razredov, sestojnih višinskih razredov in njihovih zgornjih višin. Primerjali smo rabo zemljišč v katastrskih občinah, na katerih leži Pahernikova posest (k.o. Vuhred, Planina, Orlica in Hudi Kot), v letu 1825 z letom 2017. V vseh analiziranih katastrskih občinah se je delež gozda v tem obdobju stoletja povečal, na posesti pa se je povečal za 21,4 %. Razlike v sestojnih gostotah in kazalnikih sestojne pestrosti med sestoji, kjer gozda v začetku 19. stoletja ni bilo, in sestoji na ohranjenih gozdnih zemljiščih niso statistično značilne. V prevladujočem rastiščnem tipu kisloljubno gorsko-zgornjegorsko bukovje z belkasto bekico smo ocenili za 20 % višjo lesno zalogo od primerljivih gozdov tega rastiščnega tipa na Slovenskem. Ob višjih lesnih zalogah in visokih kazalnikih debelinske pestrosti v gozdovih na Pahernikovi posesti nismo ocenili višjih sestojnih gostot SDI kot v drugih rastiščno primerljivih gozdovih. Po gradientih nadmorskih višin smo ocenili razlike v višini in zgradbi sestojne strehe, ki vplivajo na gospodarjenje znotraj posameznega rastiščnega tipa.On Pahernik\u27s forest estate it is possible to monitor the effects and success of at least half a century of forest management with uneven-aged forests. Based on the data from the control sampling method and the laser scanning of Slovenia, we assessed the structural diversity of forest stands with indicators and indices of stand densities, species and structural diversity of the DBH classes, the stand height classes and their heights. We compared land use in cadastral municipalities where Pahernik property is located (Vuhred, Planina, Orlica and Hudi Kot) in 1825, with land use from 2017. In all of the analyzed cadastral municipalities, the forest area share in land cover grew in the period from the 19th to 21st century. Forest cover increased by 21 % between 1825 and 2014 on Pahernik property as a whole. Differences in stand densities and in stand diversity indices between the stands where forest was not present in the 19th century and the stands on persistently forested lands were not statistically significant. In the prevalent forest site type montane and altimontane Fagus sylvatica forests on silicate bedrock we estimated that growing stock was by 20 % higher than in comparable forests of this site type elsewhere in Slovenia. At higher growing stocks and high values of indices of DBH variability in forests at Pahernik\u27s forest estate, the estimated stand densities SDI were not higher than in forests of comparable forest site types. We estimated differences in height and structure of stand canopy according to the gradients of height classes, which have an impact on forest management within the individual forest type
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
Detection of MDM2 alterations in cultured human hepatocytes treated with 17 beta-estradiol or 17 alpha-ethinylestradiol
No full textBackground: Preneoplastic and neoplastic lesions of the liver are suspected to arise as a result of estrogen treatment. Here we present the first report on the modulational effects of the steroids 17beta-estradiol (E2) and 17alpha-ethinylestradiol (EE2) on oncogene MDM2 in human hepatocytes. Materials and Methods:. Collagen-embedded cultures of hepatocytes stimulated with different E2/EE2 concentrations were analyzed by immunocytoehemistry, RT-PCR and sequencing for MDM2 protein/ mRNA expression, MDM2 mRNA splicing and MDM2 gene mutation. Results: The hepatocytes responded to stimulation with steroid E2/EE2 concentrations from 1-100 nmol/l with the overexpression of MDM2 protein while non-stimulated cells were negative. Stimulation with 1 nmol/l E2 and 10-100 nmol/l EE2 induced MDM2 splicing variants. Hepatocytes treated with 100 nmol/l E2 contained full-length MDM2 mRNA carrying a new type of MDM2 gene mutation. Unstimulated hepatocytes revealed neither mRNA splicing nor alteration of the MDM2 genes. Conclusion: The data show that steroid hormones are involved in the induction of MDM2 alterations in benign human hepatocytes. We speculate that some of the alterations may influence MDM2 function, thus possibly favouring genesis of liver changes
Detection of MDM2 alterations in cultured human hepatocytes treated with 17 beta-estradiol or 17 alpha-ethinylestradiol
No full textBackground: Preneoplastic and neoplastic lesions of the liver are suspected to arise as a result of estrogen treatment. Here we present the first report on the modulational effects of the steroids 17beta-estradiol (E2) and 17alpha-ethinylestradiol (EE2) on oncogene MDM2 in human hepatocytes. Materials and Methods:. Collagen-embedded cultures of hepatocytes stimulated with different E2/EE2 concentrations were analyzed by immunocytoehemistry, RT-PCR and sequencing for MDM2 protein/ mRNA expression, MDM2 mRNA splicing and MDM2 gene mutation. Results: The hepatocytes responded to stimulation with steroid E2/EE2 concentrations from 1-100 nmol/l with the overexpression of MDM2 protein while non-stimulated cells were negative. Stimulation with 1 nmol/l E2 and 10-100 nmol/l EE2 induced MDM2 splicing variants. Hepatocytes treated with 100 nmol/l E2 contained full-length MDM2 mRNA carrying a new type of MDM2 gene mutation. Unstimulated hepatocytes revealed neither mRNA splicing nor alteration of the MDM2 genes. Conclusion: The data show that steroid hormones are involved in the induction of MDM2 alterations in benign human hepatocytes. We speculate that some of the alterations may influence MDM2 function, thus possibly favouring genesis of liver changes
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Analysis of regeneration on Pahernik\u27s property
No full textKakovostno naravno pomlajevanje je ključno za sonaravno gospodarjenje, a ker gozdna inventura ne zagotavlja dovolj informacij, smo v letu 2023 izpeljali dodatno vzorčenje mladovja na mreži stalnih vzorčnih ploskev na Pahernikovi posesti. Ugotovili smo sprejemljive povprečne gostote mladja pod 130 cm višine s 15.924 osebki ha-1, mejno zadovoljive gostote mladovja nad 130 cm višine in s premerom < 5 cm z 994 osebki ha-1 in nizke gostote za mladovja med 5 in 10 cm premera z 276 osebki ha-1. Vse mladovje je v poprečju zastiralo 24 % površine tal, pritalna vegetacija pa 11 %. Razlike v gostotah in zastiranju mladovja med nadmorskimi višinami in prostorsko ločenimi deli posesti niso bile izrazite. V mladovju je prevladovala smreka (38 %), sledili sta jelka (32 %) in bukev (26 %). Visok delež jelke je bil na račun visokih gostot v višinskem razredu do 20 cm. V višjih razredih je bilo jelke vse manj, objedenost po rastlinojedi divjadi je bila intenzivnejša. Povprečno objedanje mladja do 1,3 m je znašalo 33 %, jelke pa 39 %. Izpeljana inventarizacija in analiza mladovja nakazujeta možnosti izboljševanja gozdne inventure.High-quality natural regeneration is the key to close-to-nature management, but forest inventories often fail to provide sufficient information. In 2023, we conducted additional sampling of regeneration in a network of permanent sampling plots on the Pahernik property. We found acceptable average densities for seedlings below 130 cm height, with 15,924 individuals ha-1, less satisfactory densities for saplings above 130 cm height and < 5 cm diameter, with 994 individuals ha-1, and low densities for saplings between 5 and 10 cm diameter, with 276 individuals ha-1. On average, regeneration covered 24% of the forest floor, while ground vegetation covered 11%. There were no major differences in regeneration density and cover between elevations and spatially separated parts of the property. The regeneration was dominated by Norway spruce (38%), followed by silver fir (32%) and beech (26%). The high proportion of silver fir was due to its high densities in the height class up to 20 cm. In the higher classes, silver fir was less represented and increasingly browsed by ungulates. The average browsing rate of regeneration up to 1.3 m was 33%, and specifically for silver fir, 39%. This study indicates possibilities for improving the forest inventory
- …
