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norskFakultet for naturvitenskap og teknologi: Nye registreringer
Viser treff 4001-4020 av 5414
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The Blue–Violet Color of Pentamethylbismuth: A Visible Spin-Orbit Effect
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-22)Two-component relativistic time-dependent density functional theory calculations with spin-orbit coupling predict yellow and orange–red absorption for BiPh5 and BiMe5, respectively, providing an excellent explanation for their respective violet and blue–violet colors. According to the calculations, the visible absorption is clearly attributable to a single transition from a ligand-based HOMO ... -
Unified detection system for automatic, real-time, accurate animal detection in camera trap images from the arctic tundra
(Master thesis; Mastergradsoppgave, 2017-06-01)A more efficient and effective approach for detecting animal species in digital images is required. Every winter, the Climate-ecological Observatory for Arctic Tundra (COAT) project deploys several dozen camera traps in eastern Finnmark, Norway. These cameras capture large volumes of images that are used to study and document the impact of climate changes on animal populations. Currently, the images ... -
Swirlwave. Cloudless wide area friend-to-friend networking middleware for smartphones
(Master thesis; Mastergradsoppgave, 2017-05-07)Swirlwave is a middleware that enables peer-to-peer and distributed computing for Internet-connected devices with the following characteristics: The devices lack publicly reachable IP addresses, they can be expected to disconnect from the network for periods of time, and they frequently change network locations. This is the typical case for smartphones. The middleware fits into the friend-to-friend ... -
Distributed media versioning
(Master thesis; Mastergradsoppgave, 2017-05-15)It is still strangely difficult to backup and synchronize data. Cloud computing solves the problem by centralizing everything and letting someone else handle the backups. But what about situations with low connectivity or sensitive data? For this, software developers have an interesting distributed, decentralized, and partition-tolerant data storage system right at their fingertips: distributed ... -
Studies on selectivity determinants of protein kinase inhibitor binding
(Doctoral thesis; Doktorgradsavhandling, 2017-06-09)Protein kinases are involved in many essential cellular processes, and are regulated in a dynamic manner by the movement of domains or motifs via interaction with various proteins and substrates. Protein kinase deregulation can lead to a variety of diseases, including cancer and diabetes. Protein kinase A (PKA) has been a prototype to study the entire family, including for studies in drug discovery ... -
META-pipe – Distributed Pipeline Analysis of Marine Metagenomic Sequence Data
(Doctoral thesis; Doktorgradsavhandling, 2017-05-19)With the accelerated advances in sequencing technology the last decade, the field of metagenomics has progressed immensely. Sampling and sequencing of metagenomic data is now prevalent, and publicly available data sets from mundane soil and water environments to exotic niche habitats such as geothermal hot springs are readily available through sequence data repositories such as the European Nucleotide ... -
Stress distribution calculations through a snow slab of varying hardness. Comparison with stability evaluation in the field
(Master thesis; Mastergradsoppgave, 2017-05-05)Field observations are the main tools for assessing the snow stability concerning dry snow slab avalanche release. Often, theoretical studies cannot directly be translated into useful information for avalanche recreationists and forecasters in the field, and vice versa; field observations are not always objective and quantifiable for theoretical studies. Moreover, numerical models often oversimplify ... -
Biomonitoring and risk assessment tools to manage impact of diesel oil in tropical coastal habitats
(Doctoral thesis; Doktorgradsavhandling, 2017-05-05)The focus of this work is in developing biology–based tools for environmental monitoring and risk assessment associated with diesel oil contamination in tropical coastal habitats. Prediction of impacts is generally conducted via environmental monitoring, in which environmental quality over time and space is assessed by repeated observations. Prediction of risk is included within the risk ... -
A Biofocussed Chemoprospecting Approach to Drug Discovery: Design, Synthesis and Bioactivity Screening of Diverse Biofocussed Chemical Libraries
(Doctoral thesis; Doktorgradsavhandling, 2017-04-28)With pharma R & D witnessing rising cost, high attrition rates and an overall decline in productivity in recent times, newer approaches are needed for more efficient early phase drug discovery. This thesis describes a new approach, “biofocussed chemoprospecting”. The essence of the approach is to use diverse, yet “bio-like” compounds for efficient hit-finding, along with property filtering and ... -
Geomorfologisk og strukturgeologisk undersøking av ustabile skråningar og skredavsettingar. Regional analyse av fjellområdet mellom Tromsøysundet og Ullsfjorden -Troms, Norge.
(Master thesis; Mastergradsoppgave, 2017-05-15)Samandrag Troms er det fylket i landet med flest registrerte ustabile fjellsider. Ved å kartlegga større områder for ustabile fjellparti og historiske skred, kan ein gjera ei regional analyse. Dette kan bidra til å forstå dei styrande faktorane for utrasing i eit regionalt perspektiv. Denne avhandlinga omhandlar hovudsakleg geomorfologi, og er skreve parallelt med Andreas Grumstad som har omtala ... -
Surface properties tune thermal adaptation of enzymes - Computational studies of endonuclease A
(Doctoral thesis; Doktorgradsavhandling, 2017-04-26)The endonucleases A from Aliivibrio salmonicida (VsEndA, cold-adapted) and Vibrio cholerae (VcEndA, warm-adapted) have been studied in this work. The goal was to compare these two systems, in order to find structural differences that could explain the mechanism of cold adaptation in the psychrophilic EndA. These two enzymes have previously been studied experimentally and the crystal structures have ... -
Reconstruction of late Holocene paleoenvironment in Kongsfjorden, West Spitsbergen. Based on analysis of benthic foraminifera
(Master thesis; Mastergradsoppgave, 2017-05-15)The benthic foraminiferal fauna of two marine sediment records from the Kongsfjorden Trough and the inner part of Kongsfjorden were analyzed to reconstruct the paleoenvironmental development throughout the last ~ 2000 years. A generally cold period is evident in both records, lasting from ~ 700 to 1400 CE at the Kongsfjorden Trough and from ~ 350 to 1200 CE in the inner part of Kongsfjorden, with ... -
Space-Bounded Async Scheduling. A UPCxx extension
(Master thesis; Mastergradsoppgave, 2017-05-15)It is estimated that computers and mobile devices use more than 2% of the total energy consumed. That means a lot of energy is going in powering our cpu,display and gpu. In this paper we are trying to optimize the power consumed by cpu in partitioned global address space environment. Recent research suggests that there is scope in improving cpu power usage by having a better scheduler. Simhadri ... -
Paleoceanographic Development in Nordfjord, North East Greenland, During the Mid- and Late Holocene
(Master thesis; Mastergradsoppgave, 2017-05-15)Sediment core HH13-012GC-TUNU, retrieved from Nordfjord, North-East Greenland, has been investigated in order to reconstruct the paleoceanographic development during the mid- and late Holocene. Nordfjord is one of three tributary fjords to Kaiser Franz Joseph Fjord, and Waltershausen Gletcher is located at its head. The fjord system is largely influenced by the Eastern Greenland Current. Most of ... -
EC3 - Edge Command-Control-Communication System for Arctic Observatories
(Master thesis; Mastergradsoppgave, 2017-05-13)This paper presents a prototype of a system for automated observations of flora and fauna in the Arctic. Currently applied methods of observation depend mostly on systems (usually consisting of a camera unit, a motion detection sensor and a memory card) that are left unattended in remote locations during extended periods of data gathering. The main problem with such approach is that no remote control ... -
Processing and interpretation of the Svyatogor 2016 high-resolution P-Cable 3D seismic dataset. Investigating the dynamics of a sub-seabed gas hydrate system with a potential abiotic methane source
(Master thesis; Mastergradsoppgave, 2017-06-01)A new high-resolution P-Cable 3D seismic dataset was acquired in July 2016 targeting a seafloor pockmark cluster at the northern end of Svyatogor Ridge, offshore west Svalbard. The processing and interpretation of this dataset formed the primary focus of this thesis. The seismic processing sequence was designed to enhance the signal-to-noise ratio of the data while preserving the useful signal ... -
Structural determinants of ligand binding to ATP dependent enzymes: Studies of Protein Kinase and Heat Shock Protein 70.
(Doctoral thesis; Doktorgradsavhandling, 2017-04-07)Enzymes are protein molecules that accelerate, or “catalyze”, specific chemical reactions. The reacting molecules, or substrates, bind to the enzyme which then enables their effective conversion into different product molecules. Virtually all metabolic processes in the cell need enzymes to occur at speeds fast enough to maintain life. The kinases are a large group of phosphotransferases, i.e. enzymes ... -
Exploratory data analysis of flexural waves in Arctic fjord ice seismic data
(Master thesis; Mastergradsoppgave, 2017-05-14)A seismic source on floating ice induces flexural waves in the ice layer. An exploratory data analysis of Arctic fjord ice seismic data is performed for the purpose of identifying and studying characteristics of flexural waves and other related wave modes. Both geophone and hydrophone data are examined with the purpose of studying ice properties from ice wave behavior. Power spectral density estimates ... -
Glacial history and geomorphology of Trygghamna, western Svalbard
(Master thesis; Mastergradsoppgave, 2017-05-15)This study investigates Trygghamna, a small fjord on the western coast of Spitsbergen, Svalbard. In order to investigate its glacial history, high-resolution aerial images and swath bathymetry are used to produce a detailed geomorphological map of the area, with a focus on the Neoglacial extent of the three largest glaciers in the fjord, Protektor-, Harriet- and Kjerulfbreen. The landforms are ... -
Geomorfologisk kartlegging av Kjosen, Lyngen, Troms. Med fokus på snøskredavsetninger på Sultinden og Tytebærdalen
(Master thesis; Mastergradsoppgave, 2017-05-15)Snøskred er et utbredt faremoment i Norge og Troms, og har de siste årene tatt flere menneskeliv. Det investeres store ressurser i beskyttelsestiltak, og behovet for å forstå snøskred – hvor og når de kan inntreffe – vokser i takt med samfunnsutvikling og klimaendringer. Kjosen i Lyngen er utsatt for skred hvert år, og det har gått både hus og menneskeliv tapt her. Snøskred er også en geomorfologisk ...
