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norskBrowsing Fakultet for naturvitenskap og teknologi by Title
Now showing items 3746-3765 of 4765
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Sand waves and sediment transport on the SW Barents sea continental slope
(Master thesis; Mastergradsoppgave, 2012-11-15)I study a sand-wave field in ~600 meters water depth on the continental slope offshore Northern Norway. Using multibeam bathymetry data from 2008 and 2011 and P-Cable high-resolution 3D seismic data from 2011, I characterize the field. Sand waves reach up to 6.6 m in height and have wavelengths as large as 140 m. They are mostly asymmetric in shape with the steepest side dipping to the northwest, ... -
SAR and Passive Microwave Fusion Scheme: A Test Case on Sentinel-1/AMSR-2 for Sea Ice Classification
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-14)The most common source of information about sea ice conditions is remote sensing data, especially images obtained from synthetic aperture radar (SAR) and passive microwave radiometers (PMR). Here we introduce an adaptive fusion scheme based on Graph Laplacians that allows us to retrieve the most relevant information from satellite images. In a first test case, we explore the potential of sea ice ... -
SAR imaging and detection of partially coherent targets
(Master thesis; Mastergradsoppgave, 2018-05-23)A synthetic aperture radar (SAR) achieves a high azimuth resolution by illuminating targets with multiple pulses and using the Doppler history to synthesize a large antenna. When combining the pulses, it is normally assumed that the targets are stationary, and that their reflectivity is independent of time. The topic of this thesis is the processing of SAR images where the the targets have a ... -
SARINOR WP 3 "SØK". (Norut rapport 11/2015)
(Research report; Forskningsrapport, 2015)Arbeidet analyserer tilgjengelig søk og redningskapasitet (SAR), med fokus på søk, med sikte på å avdekke forbedringspunkter. Arbeidet er begrenset til Norges ansvarsområde i henhold til Arktisk råds avtale om søk og redning i Arktis. Redningshelikopter på SAR beredskap består av 2 AS332L1 AWSAR på Svalbard, et Sea King på Banak og et i Bodø. I tillegg har Bristow et EC225 AWSAR helikopter i Hammerfest. ... -
Satellite communication applied in a distributed application
(Research report; Forskningsrapport, 1994-12)The paper describes the development of a prototype application for access to vital weather information from the Northern Atlantic sea region. The application gives meteorologists access to weather observations measured on sea vessels. Today the available information is very limited. On a daily basis, only 4-5 weather observations in the whole arctic sea-region are conducted. It is therefore suggested ... -
Satellittovervåking av isdrift i Arktis
(Conference object; Konferansebidrag, 2013) -
Sáhka
(Mastergradsoppgave; Master thesis, 2022-05-25)Elite football today is infused with technologies for collecting data on players' performance and health. Technologies such as wearable health and fitness trackers, full-body medical scans, and positional systems mounted around a stadium give coaches a wide range of accurate data about their players. However, coaches do not have the time or ability to analyze all this data for each player to give ... -
Scalability of Distributed Version Control Systems
(Journal article; Tidsskriftartikkel, 2017-11-26)<p>Distributed version control systems are popular for storing source code, but they are notoriously ill suited for storing large binary files. <p>We report on the results from a set of experiments designed to characterize the behavior of some widely used distributed version control systems with respect to scaling. The experiments measured commit times and repository sizes when storing single files ... -
A scalable and green one-minute synthesis of substituted phenols
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-07)A mild, green and highly efficient protocol was developed for the synthesis of substituted phenols via <i>ipso</i>-hydroxylation of arylboronic acids in ethanol. The method utilizes the combination of aqueous hydrogen peroxide as the oxidant and H<sub>2</sub>O<sub>2</sub>/HBr as the reagent under unprecedentedly simple and convenient conditions. A wide range of arylboronic acids were smoothly ... -
Scalable computing for earth observation - Application on Sea Ice analysis
(Doctoral thesis; Doktorgradsavhandling, 2022-12-15)<p>In recent years, Deep learning (DL) networks have shown considerable improvements and have become a preferred methodology in many different applications. These networks have outperformed other classical techniques, particularly in large data settings. In earth observation from the satellite field, for example, DL algorithms have demonstrated the ability to learn complicated nonlinear relationships ... -
Scalable exploration of population-scale drug consumption data
(Master thesis; Mastergradsoppgave, 2019-06-01)The potential for knowledge discovery is currently underutilized on pharmacoepidemiologic data sets. A big dataset enables finding and assessing rare drug consumption patterns that are associated with adverse drug reactions causing hospitalization, or death. To enable such exploration of big pharmacoepidemiology data, four key issues need so be addressed. First, to ingest, transform, preprocess ... -
A scalable, interactive widget library for visualizing biological data
(Master thesis; Mastergradsoppgave, 2011-06)In biology the introduction next generation technology is increasing the amount of data generated rapidly. New sequencing machines are able to produce terabytes of genomic data in days and in later years the cost of storing data has become higher than to produce it. With enormous amounts of data arrives great opportunities, but also new challenges; how should biologists analyze and interpret the ... -
Scalable-resolution structured illumination microscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-15)Structured illumination microscopy suffers from the need of sophisticated instrumentation and precise calibration. This makes structured illumination microscopes costly and skill-dependent. We present a novel approach to realize super-resolution structured illumination microscopy using an alignment non-critical illumination system and a reconstruction algorithm that does not need illumination ... -
Scalar Relativistic Effects with Multiwavelets: Implementation and Benchmark
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-05)The importance of relativistic effects in quantum chemistry is widely recognized, not only for heavier elements but throughout the periodic table. At the same time, relativistic effects are strongest in the nuclear region, where the description of electrons through a linear combination of atomic orbitals becomes more challenging. Furthermore, the choice of basis sets for heavier elements is ... -
Scale Space Methods for Analysis of Type 2 Diabetes Patients' Blood Glucose Values
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)We describe how scale space methods can be used for quantitative analysis of blood glucose concentrations from type 2 diabetes patients. Blood glucose values were recorded voluntarily by the patients over one full year as part of a self-management process, where the timeand frequency of the recordings are decided by the patients. This makes a unique datasetin its extent, though with a large variation ... -
Scale-free vortex cascade emerging from random forcing in a strongly coupled system
(Working paper; Arbeidsnotat, 2008-03-04)The notions of self-organised criticality (SOC) and turbulence are traditionally considered to be applicable to disjoint classes of phenomena. Nevertheless, scale-free burst statistics is a feature shared by turbulent as well as self-organised critical dynamics. It has also been suggested that another shared feature is universal non-gaussian probability density functions (PDFs) of global fluctuations. ... -
Scale-space methodology applied to spectral feature detection, multinormality testing and the k-sample problem, and wavelet variance analysis
(Doctoral thesis; Doktorgradsavhandling, 2012-03-23)The number of scale-space statistical algorithms has been greatly increased over the last 15 years. The concept originated from computer vision, introduced in Lindeberg (1994). The seminal paper by Chaudhuri and Marron (1999) brought the scale-space concept into smoothing of curves and kernel density estimation through the SiZer tool. By using all relevant smoothing bandwidths, i.e., the scale part, ... -
Scales of tectonic processes controlling fluid flow systems on the Svyatogor Ridge, Fram Strait
(Doctoral thesis; Doktorgradsavhandling, 2019-06-13)The Svyatogor Ridge, located in the Fram strait, is a site hosting a fluid flow system. The Svyatogor Ridge is part of the inside corner high at the Knipovich Ridge-Molloy Transform fault intersection. The Knipovich Ridge is an ultra-slow, melt-poor spreading ridge with approximately 8 mm/yr spreading rate. At this northernmost segment of the Knipovich Ridge, spreading is predominantly accommodated ... -
Scaling of global temperatures explained by linear energy balance models
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12)<i>Introduction</i>: Scale invariance of natural variability of global surface temperatures is often interpreted as a signature of nonlinear dynamics. However, the observed scaling can be adequately explained by linear energy balance involving subsystems with different response times. -
Scanning acoustic microscopy—A novel noninvasive method to determine tumor interstitial fluid pressure in a xenograft tumor model
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-22)Elevated tumor interstitial fluid pressure (TIFP) is a prominent feature of solid tumors and hampers the transmigration of therapeutic macromolecules, for example, large monoclonal antibodies, from tumor-supplying vessels into the tumor interstitium. TIFP values of up to 40 mm Hg have been measured in experimental solid tumors using two conventional invasive techniques: the wick-in-needle and the ...
