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norskInstitutt for informatikk: Recent submissions
Now showing items 421-440 of 640
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Embedded analytics of animal images
(Master thesis; Mastergradsoppgave, 2017-12-14)Due to the large increase of image data in animal surveillance, an effective and efficient way of labeling said data is required. Over the past few years the Climate-ecological Observatory for Arctic Tundra (COAT) project have deployed dozens of cameras in eastern Finnmark, Norway during winter, which have resulted in a large volume of wildlife images which is used to document the effects of climate ... -
Telemedicine Services for the Arctic: A systematic review
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-28)Background: Telemedicine services have been successfully used in areas where there are adequate infrastructures such as reliable power and communication lines. However, despite the increasing number of merchants and seafarers, maritime and Arctic telemedicine have had limited success. This might be linked with various factors such as lack of good infrastructure, lack of trained onboard personnel, ... -
Internet of things DDoS mitigation. Preventing DDoS attacks using learning algorithms on limited hardware
(Master thesis; Mastergradsoppgave, 2017-10-01)DDoS attacks are becoming more and more common, and threatens the current infrastructure of the internet. Cheap new IoT devices have led to a lot of new devices that are poorly secured and can easily be compromised and used for such nefarious purposes. While there are many attemps at solving this problem this thesis looks at a solution which could be applied to typical home router. This would stop ... -
Телемедицина в Северной Норвегии: Уроки 25 лет развития
(Book; Bok, 2015) -
Automated Lung Sound Analysis
(Master thesis; Mastergradsoppgave, 2016-06-01)Lungs sounds has been used as a diagnostic tool for centuries. The usefulness of listening to lung sounds, or pulmonary auscultation, as a definite diagnostic method has been diminished by advances in medical imaging such as chest X-Ray, but these advanced methods also bring a higher monetary and time cost. In addition, when the severity of pulmonary conditions changes, audible symptoms change ... -
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 ... -
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 ... -
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 ... -
Exploring in-game rewards in the diaquarium. A serious game for children with type 1 diabetes mellitus
(Master thesis; Mastergradsoppgave, 2016-12-22)Digital games do not only serve entertainment purposes, but can also benefit as useful tools for learning. Games that have an explicit and carefully thought-out educational intention has appeared as very productive within health care, and have been used more frequently as part of treatment among children with Type 1 Diabetes Mellitus. Insulin-depended diabetes has no known cure at the present time, ... -
Creating a better play store for cancer apps by using the meta data. Is the metadata available enough to improve app finding for apps related to cancer?
(Master thesis; Mastergradsoppgave, 2016-12-15)The current app store is minimalistic and gives a minimum of functionality, there are in principle two options, a list of recommended apps and the search function. Where the search function is as good as the user is able to come up with search words. The question then is; is it possible to create a third party app that works as an overlay and give a more useful result. In order to make the problem ... -
Using satellite execution to reduce latency for mobile/cloud applications
(Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-02-03)We demonstrate a practical way to reduce latency for mobile .NET applications that interact with cloud services, without disrupting application architectures. We provide a programming abstraction for location-independent code, which has the potential to execute either locally or at a satellite execution environment in the cloud, where other cloud services can be accessed with low latency. This ... -
Gender differences in the association between grip strength and mortality in older adults: results from the KORA-age study
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-30)Background: Reduced muscular strength in the old age is strongly related to activity impairment and mortality. However, studies evaluating the gender-specific association between muscularity and mortality among older adults are lacking. Thus, the objective of the present study was to examine gender differences in the association between muscular strength and mortality in a prospective population-based ... -
GreenBST: Energy-efficient concurrent search tree
(Conference object; Konferansebidrag, 2016-08-09)Like other fundamental abstractions for energy-efficient com- puting, search trees need to support both high concurrency and fine- grained data locality. However, existing locality-aware search trees such as ones based on the van Emde Boas layout (vEB-based trees), poorly support concurrent (update) operations while existing highly-concurrent search trees such as the non-blocking binary search ... -
On the performance and energy efficiency of the PGAS programming model on multicore architectures
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-15) -
Access control protocol with node privacy in wireless sensor networks
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-15)For preventing malicious nodes joining wireless sensor networks (WSNs), an access control mechanism is necessary for the trustworthy cooperation between the nodes. In addition to access control, recently, privacy has been an important topic regarding how to achieve privacy without disclosing the real identity of communicating entities in the WSNs. Based on elliptic curve cryptography, in this paper, ... -
Secure and scalable statistical computation of questionnaire data in R
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-12)Collecting data via a questionnaire and analyzing them while preserving respondents' privacy may increase the number of respondents and the truthfulness of their responses. It may also reduce the systematic differences between respondents and non-respondents. In this paper, we propose a privacy- preserving method for collecting and analyzing survey responses using secure multi-party computation. The ... -
Implementing and optimizing a Sparse Matrix-Vector Multiplication with UPC
(Research report; Forskningsrapport, 2016)Programmability and performance-per-watt are the major challenges of the race to Exascale. In this study we focus on Partitioned Global Address Space (PGAS) languages, using UPC as a particular example. This category of parallel languages provides ease of programming as a strong advantage over the classic Message Passing Interface(MPI). PGAS has also advantages compared to classic shared memory ... -
Useful GPGPU Programming Abstractions. A thorough analysis of GPGPU development frameworks
(Master thesis; Mastergradsoppgave, 2016-06-01)Today, computers commonly have graphics hardware with a processing power far exceeding that of the main processors in the same machines. Modern graphics hardware consists of highly data-parallel processors, which are user programmable. However, software development utilizing these processors directly is reserved for platforms that require a fair bit of intimate knowledge about the underlying hardware ...
