V. Žuko asmenybei ir kūrybinei veiklai aptarti skirtų monografijų nėra. Profesoriaus tyrinėjimo objektu tapę darbai apie Lietuvos spaudos istoriją ir leidybą plačiau nagrinėti ir apibendrinti nebuvo. Tiesa, yra dalis darbų ( priskaičiuojami 25 darbai), kuriuose pateikiama informacijos apie V. Žuką, jo darbus, pridėti papildymai, bandoma įsigilinti į nagrinėjamą problematiką, tačiau atskiras dėmesys darbams apie Lietuvos spaudos istoriją ir leidybą nebuvo skirtas, tad nepaliesti liko kai kurie svarbūs šių darbų ypatumai. V. Žuko darbai leidybos tematika buvo menkai tyrinėti. Siekis išsiaiškinti profesoriaus indėlį į Lietuvos leidybos istorijos tyrinėjimus ir noras išanalizuoti kokias aktualiausias problemas, esminius bruožus išskyrė V. Žukas lėmė ginamo magistro darbo temos pasirinkimą. Darbo problema – V. Žuko darbų Lietuvos leidybos istorijos tematika neištirtamas. Darbo objektas – profesoriaus mokslinė produkcija . Svarbu atkreipti dėmesį, jog darbe bus analizuojama visa V. Žuko mokslinė produkcija, norint išskirti kokį darbų skaičių sudarė Lietuvos spaudos ir leidybos istorijos tema. Magistrinio darbo tyrimo tikslas – ištirti profesoriaus Vlado Žuko indėlį į Lietuvos leidybos istoriją. Magistrinio darbo hipotezė – profesorius Vladas Žukas įdėjo indėlį į Lietuvos leidybos istorinėjimus. Tikslui realizuoti iškelti šie uždaviniai: 1) Išanalizuoti Lietuvos leidybos istorijos istoriografiją. 2) Išanalizuoti profesoriaus Vlado Žuko mokslinę produkciją. 3) Ištirti profesoriaus... [toliau žr. visą tekstą] / Research object – scientific produce of V. Žukas. It is important to indicate that in this research project will be analyzed the entire scientific products of V. Žukas in order to exclude the number of proceedings that were done of Lithuanian printing and the history of publishing. The aim of research – to explore V. Žukas contribution of the history of publishing in Lithuanian. Research objectives: to analyze the history historiography of publishing in Lithuania; to analyze professors’ scientific production; to explore V. Zukas citation indexes at academic level; to explore V. Žukas monographs about history of publishing in Lithuania. Based on analysis of nonfiction and qualitative information interpretation it was concluded that articles with topics about history of Lithuanian printing and publishing, which were published by professor V. Žukas, were analyzed logically, structurally, systematically and based on the chronology. Analysis of the most important projects of Lithuanian publishing outfits in 1918-1940 showed that professor structurally and diagrammatically analyzed processes of publishing, circulation and marketing of books. An important notice was dedicated to illustrations, which have the purpose of information, to acquaint with technical databases at that period, book typography, design, aesthetic solutions. Abudance of sources in monographs indicates that professor was searching for the information in the archives, but also made reference on letters, stories... [to full text]

Aim of the work: to explain possibilities of natural birch regeneration if clearcut areas, to detect main influencing factors and their intensity. Object of the work: Clearcut areas from 1996, 1999 and 2002 of site types Lfs and Lds of Pakruojis State Forest Enterprise. Methods: for analysis of regeneration quality, rectangular sample plots were selected. They were placed in the clearcut areas 20, 40 and 60 metres from their western edge. The density, height and age of sapling according to tree species was determined. Saplings were evaluated according to their growth conditions: prepared or unprepared soil. Dependence of saplings density on the stand from western side as well as dependence saplings density and height on precedent stand was investigated. Research data was processed using methods of dispersive and regression analysis. Results: it was determined, that regeneration of birch depends on site type and precedent stand, soil preparation, stand from western site of the clearcut. Soil preparation, stand from western site of the clearcut have the biggest influence on birch saplings density. Height of birch saplings depends on soil preparation and soil type. Distance from stand edge have no influence on birch natural regeneration.