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Dissertation
Component Based Platform for Wearable Augmented Reality
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Year: 2013 Publisher: Gent : s.n.,

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Abstract

Augmented Reality (AR) is adding computer generated objects to the reality, allowing the user to see more then just the environment. AR is gaining popularity in every day life. It has several goals and can be used for interactive, recreational or professional applications.Most AR-applications are developed for one specific task, without taking reusabilityinto account. A lot of applications share the same functionality, which is developed again for each different application.In this thesis a platform which offers mutual functionality for Augmented Reality has been developed. This platform should be able to be used on multiple systems and is a cross-platform implementation.The AR-platform is implemented by OSGi and uses modules that contain ARfunctionality. OSGi is based on Java, so just like Java it is cross-platform software. To be able to test the AR-functionality a layered system was developped. This layered system is the environment the AR-platform runs on. It is aminimal implementation wich uses the Linux kernel. The layer above the kernel contains the native libraries V4L2, libdrm and OpenGL ES. The library V4L2 offers videocapturing to the system, libdrm and OpenGL ES are used to render on the screen. OSGi communicates with these libraries through JNI.Using JNI to support communication between OSGi and the native libaries brings extra overhead to the system. This overhead is evaluated by performancetests Augmented Reality (AR) is het afbeelden van de realiteit samen met computergegenereerde beelden, waardoor de gebruiker meer ziet dan de echte realiteit. AR is al even zijn intrede aan het doen in het dagelijkse leven en heeft verschillende doelen. Het kan gebruikt worden voor interactieve, ontspannende applicaties tot toepassingen in het bedrijfsleven.De meeste AR-applicaties zijn specifiek voor één taak ontwikkeld, zonder oog voor herbruikbaarheid. Er is echter veel functionaliteit gemeenschappelijk tussen applicaties, deze moet steeds opnieuw ontwikkeld worden.In deze masterproef wordt een platform gerealiseerd die de gemeenschappelijke functionaliteit voor AR aanbiedt. Het platform moet bruikbaar zijn op verschillende systemen en moet dus platformonafhankelijk zijn. Het AR-platform wordt geïmplementeerd in OSGi en gebruikt modules om de AR-functionaliteit aan te bieden. OSGi draait op Java en is dus, net zoals Java, platformonafhankelijk. Om de AR-functionaliteit aan te bieden werd een onderliggend gelaagd systeem ontwikkeld dat zo minimaal mogelijk gehouden wordt. De basis is een Linuxkernel, waarop de native libraries V4L2, libdrmen OpenGL ES draaien. De V4L2-bibliotheek zorgt voor het ophalen van camerabeelden en libdrm en OpenGL ES laten renderen op het scherm toe. De bovenliggende OSGi-laag communiceert met deze bibliotheken via Java NativeInterface (JNI).De communicatie tussen OSGi en de native libraries via JNI zorgt voor extra overhead. Om te weten of dit het systeem niet te veel vertraagt worden er performantietesten gedaan.


Book
Responses of Plants to Environmental Stresses
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Environmental abiotic stresses, such as extreme temperatures, drought, excess light, salinity, and nutrient deficiency, have detrimental effects on plant growth, development, and yield. Plants are equipped with various adaptation mechanisms to cope with such unfavorable conditions. Our understanding of plants’ abiotic stress responses is crucial to maintaining efficient plant productivity. This book on the responses of plants to environmental stresses is an attempt to find answers to several basic questions related to their adaptation and protective mechanisms against abiotic stresses. The following chapters of the book describe examples of plants’ protective strategies, which cover physiological, cellular, biochemical, and genomic mechanisms. This book is aimed for use by advanced students and researchers in the area of stress biology, plant molecular biology and physiology, agriculture, biochemistry, as well as environmental sciences.


Book
Responses of Plants to Environmental Stresses
Author:
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Environmental abiotic stresses, such as extreme temperatures, drought, excess light, salinity, and nutrient deficiency, have detrimental effects on plant growth, development, and yield. Plants are equipped with various adaptation mechanisms to cope with such unfavorable conditions. Our understanding of plants’ abiotic stress responses is crucial to maintaining efficient plant productivity. This book on the responses of plants to environmental stresses is an attempt to find answers to several basic questions related to their adaptation and protective mechanisms against abiotic stresses. The following chapters of the book describe examples of plants’ protective strategies, which cover physiological, cellular, biochemical, and genomic mechanisms. This book is aimed for use by advanced students and researchers in the area of stress biology, plant molecular biology and physiology, agriculture, biochemistry, as well as environmental sciences.

Keywords

Medicine --- Heterogeneous water stress --- Phyllostachys edulis --- Rhizome --- Vascular bundle --- Stress Signal --- Physiological characteristics --- isoprene --- ocimene --- heat stress --- water stress --- ramie (Boehmeria nivea (L.) Gaudich) --- transcriptome --- nitrogen deficiency --- resilience --- nitrogen-use efficiency --- eggplant --- heat shock factor --- gene family --- expression profile --- abiotic stress --- Malus. ‘Prairifire’ --- photosynthetic characteristics --- chlorophyll a fluorescence --- 2-dimensional electrophoresis --- diurnal regulation --- OsGI --- rice --- U-box E3 ligase --- barley --- ABC gene family --- gene expression --- alarm photosynthesis --- Antarctic --- oxalate oxidase --- Elymus sibiricus, seed aging --- isobaric tandem mass tag labeling --- reactive oxygen species --- parallel reaction monitoring --- Dendrobium catenatum --- superoxide dismutase (SOD) --- stresses --- antioxidative enzyme activity --- low pH --- proline --- protein --- wheat --- WRKY transcription factor --- gene structural characteristics --- regulatory mechanism --- drought --- salinity --- heat --- cold --- ultraviolet radiation --- rainfed --- irrigated --- Gossypium hirsutum --- antioxidant activity --- growth inhibition --- ion homeostasis --- salt stress --- rhizoboxes --- gaseous exchange --- sub-Saharan Africa --- root length density --- Heterogeneous water stress --- Phyllostachys edulis --- Rhizome --- Vascular bundle --- Stress Signal --- Physiological characteristics --- isoprene --- ocimene --- heat stress --- water stress --- ramie (Boehmeria nivea (L.) Gaudich) --- transcriptome --- nitrogen deficiency --- resilience --- nitrogen-use efficiency --- eggplant --- heat shock factor --- gene family --- expression profile --- abiotic stress --- Malus. ‘Prairifire’ --- photosynthetic characteristics --- chlorophyll a fluorescence --- 2-dimensional electrophoresis --- diurnal regulation --- OsGI --- rice --- U-box E3 ligase --- barley --- ABC gene family --- gene expression --- alarm photosynthesis --- Antarctic --- oxalate oxidase --- Elymus sibiricus, seed aging --- isobaric tandem mass tag labeling --- reactive oxygen species --- parallel reaction monitoring --- Dendrobium catenatum --- superoxide dismutase (SOD) --- stresses --- antioxidative enzyme activity --- low pH --- proline --- protein --- wheat --- WRKY transcription factor --- gene structural characteristics --- regulatory mechanism --- drought --- salinity --- heat --- cold --- ultraviolet radiation --- rainfed --- irrigated --- Gossypium hirsutum --- antioxidant activity --- growth inhibition --- ion homeostasis --- salt stress --- rhizoboxes --- gaseous exchange --- sub-Saharan Africa --- root length density

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