Browsing 3. Doktoritööd by Title
Now showing items 1-20 of 66
-
Analysis of tree competition and structural indices with a focus on modelling Silver birch (Betula pendula Roth) stands
(Eesti Maaülikool, 2016)The thesis is designed to establish and assess different approaches of competition measurement, incorporated with various competitor selection methods, focusing on silver birch in Estonia. The effect of competition and ... -
Applicability of low-cost electromyographs in ergonomic assessment
(Eesti Maaülikool, 2020)Every year a considerable amount of gross domestic product in several countries is lost due to work-related musculoskeletal disorders (WMSDs). Thus, one of the goals of ergonomics is to prevent WMSDs. A body of knowledge ... -
Application of Dendroclimatological Methods for Forest Growth Modelling
(Eesti Maaülikool, 2011)Kaasaja metsateaduse üheks olulisemaks ülesandeks on puistu kasvu ja struktuuri modelleerimine. Puistu kasvukäiku saab modelleerida erinevatel meetoditel, kusjuures meetodi valik sõltub eelkõige andmete iseloomust. Metsade ... -
Approaches to Forest Design in Estonia
(Eesti Maaülikool, 2009)Käesolev töö selgitab Forest Design (FD) meetodi, mis on Göttingeni Ülikooli professori Klaus von Gadowi väljapakutud uudne kontseptsioon, kasutamisvõimalusi metsakorralduses. Klassikaline metsakorralduse teooria tugineb ... -
Assessment of climate effects on Scots pine (Pinus sylvestris L.) growth in Estonia
(Eesti Maaülikool, 2017)The doctoral thesis focuses on the influence of long-term local weather variation on Scots pine growth on a temporal and spatial scale. Dendrochronological methods were used to determine the most influential climatic factors ... -
Assessment of private forest owners’ cooperation in Estonia
(Eesti Maaülikool, 2015)The sustainable management of forest resources is important as it is linked to many goods and services that people need, e.g. timber, mushrooms, berries, and biodiversity. Therefore, it is important that these resources ... -
Biosensor array for BOD measurements in different types of wastewater
(Estonian University of Life Sciences, 2022)The basis of all life on Earth is the existence of clean water. The state of water must be constantly monitored to ensure that the water is clean. One critical parameter in accessing water purity is the content of organic ... -
Biota and Persistence of Retention Trees in Relation to the Characteristics of the Trees and Cut Areas
(Eesti Maaülikool, 2008)Viimastel aastakümnetel pööratakse metsanduses majandusliku tasuvuse kõrval tähelepanu ka säästlikule majandamisele, lähtudes metsa teistest väärtustest, sealhulgas elustikulise mitmekesisuse säilitamisest. Üheks vastavaks ... -
Carbon and nitrogen fluxes in birch and grey alder stands growing on different sites
(Eesti Maaülikool, 2019)Increase in carbon (C) sequestration in different ecosystems is a crucial task in mitigating climate change. Among terrestrial ecosystems, boreal and hemiboreal forests have been reported as ecosystems with high C sink ... -
Carbon fluxes and storages in a chronosequence of Silver birch stands
(Eesti Maaülikool, 2014)Võimalike kliimamuutuste tõttu on muutunud tänapäeval aktuaalseks teemaks süsihappegaasi kontsentratsiooni tõus atmosfääris, seejuures pööratakse tähelepanu nii CO2 emissiooni vähendamisele kui ka selle ulatuslikumale ... -
Changes in agricultural land use in Estonia: opportunities for stable land use
(Estonian University of Life Sciences, 2023)The issue of land concentration in the EU and many parts of the world remains basic and is one of the most serious land issues in the district today. Agricultural land is becoming increasingly concentrated into the hands ... -
Characteristics of Bioethanol Fuel Obtained From LignocelluloseI Biomass in Internal Combustion Reciprocating Engines With Spark- and Compressioignition
(Eesti Maaülikool, 2013)It can be claimed about the use of bioethanol produced on the basis of lignocellulose raw material under Estonian conditions that: 1. The amount of fuel produced from one hectare of natural grasslands is seven times ... -
The characterization and modelling of the dynamic behavior of hard-to-machine alloys
(Eesti Maaülikool, 2012)Because of their excellent mechanical, physical and chemical properties even at elevated temperature, titanium and nickel-base alloys are the materials suitable for the production of several parts and components in ... -
Compatibility of Energy Consumption with the Capacity of Wind Generators
(Eesti Maaülikool, 2011)Taastuvenergia osatahtsus Eestis peab erinevate arengukavade alusel kasvama. Erinevatest taastuvenergia liikidest on koige kiiremini kasvanud tuule osatahtsus ja toodetud energia hulk. Tuulegeneraatorite valjundvoimsus ... -
Computer-aided Optimization of Pig Farming Technologies and Machinery Use
(Eesti Maaülikool, 2007)Väitekirja kirjanduse analüüsi osas on kirjeldatud seakasvatustehnoloogiaid, seakasvatusega kaasnevaid keskonnakaitse nõudeid, “parimat võimalikku tehnikat” (PVT) seakasvatuses ning on esitatud ülevaade seakasvatuses ... -
Condition and Residual Bearing Capacity of Existing Reinforced Concrete Structures
(Eesti Maaülikool, 2011)Betooni kõrge survetugevus ja terase head tugevusnäitajad tõmbel teevad raudbetoonist laialdaste kasutusvõimalustega komposiitmaterjali, mida kasutati möödunud sajandil ehitustarindites küllaltki ulatuslikult. Vananemise ... -
Correcting and Calibrating Airbone Laser Scanning Intensity Data Using Naturally Available Targets
(Eesti Maaülikool, 2012)Airborne laser scanning (ALS) has been used widely due to its three dimensional information. Additionally to coordinates, ALS systems record also intensity values that describe the objects backscattering properties. The ... -
Cultivation technology for lowbush blueberry cultivation in milled peat field plantations
(Eesti Maaülikool, 2021)Blueberry cultivation on milled peat fields is not particularly common in Estonia, while also not being very profitable. The basis for the development of blueberry cultivation is the mechanization and automation of ... -
The Dependence on the Structure of Machinery and the Locality of Plots on Cereal Farm Work Activities
(Eesti Maaülikool, 2009)Põllumees teab, et mida suurem on tootmismaht ehk haritava maa pindala või loomade arv, seda paremini on võimalik oma tootmisvahendeid koormata ja seega vähendada püsikulude osakaalu toodangu omahinnas. Lisaks annab ... -
Design of Distributed Energetics Solution Based on the Increasing of Direct Consumption of Electricity Generated from Wind and Solar Energy
(Eesti Maaülikool, 2016)This doctoral thesis presents six original papers, which are used to demonstrate the design possibilities for increasing the local renewable energy consumption of buildings equipped with renewable energy production ...