Map matching by using inertial sensors: literature review

This literature review aims to clarify what is known about map matching by using inertial sensors and what are the requirements for map matching, inertial sensors, placement and possible complementary position technology. The target is to develop a wearable location system that can position itself within a complex construction environment automatically with the aid of an accurate building model. The wearable location system should work on a tablet computer which is running an augmented reality (AR) solution and is capable of track and visualize 3D-CAD models in real environment. The wearable location system is needed to support the system in initialization of the accurate camera pose calculation and automatically finding the right location in the 3D-CAD model. One type of sensor which does seem applicable to people tracking is inertial measurement unit (IMU). The IMU sensors in aerospace applications, based on laser based gyroscopes, are big but provide a very accurate position estimation with a limited drift. Small and light units such as those based on Micro-Electro-Mechanical (MEMS) sensors are becoming very popular, but they have a significant bias and therefore suffer from large drifts and require method for calibration like map matching. The system requires very little fixed infrastructure, the monetary cost is proportional to the number of users, rather than to the coverage area as is the case for traditional absolute indoor location systems.Siirretty Doriast

Technology hype, promises, and expectations: The discussion on small modular reactors in the Finnish newspaper 'Helsingin Sanomat' in 2000-2022

While the construction of collective promises is vital to the success of any techno-scientific innovation, it also entails the risk of overpromising and cycles of hype and disappointment. This article explores the discursive construction of the nuclear sector's latest promise concerning small modular reactors (SMRs), using Finland as an example. It provides a brief overview of the Finnish context of SMR development and analyzes it's coverage in the leading Finnish daily newspaper Helsingin Sanomat 2000-2022. Efforts at promise construction have so far been aimed at building legitimacy for SMRs, while strengthening credibility - another key element of successful promise construction - has only just begun. The increasing number of SMR-related articles indicates a growing hype, but the absence of a corresponding 'hype language' suggests that the considerable media attention does not automatically translate into emphatic media coverage and discursive hyping.Die Konstruktion kollektiver Versprechen ist zwar für den Erfolg jeder technologisch-wissenschaftlichen Innovation von entscheidender Bedeutung, birgt jedoch auch das Risiko allzu großer Versprechungen und Hype-Zyklen sowie Enttäuschung. Dieser Forschungsartikel untersucht die diskursive Konstruktion neuester Versprechen im Nuklearsektor am Beispiel kleiner modularer Reaktoren (SMRs) in Finnland. Er gibt einen kurzen Überblick über die SMR-Entwicklung in Finnland und analysiert die Berichterstattung in der führenden finnischen Tageszeitung Helsingin Sanomat zwischen 2000 und 2022. Bisher zielten die Bemühungen darauf ab, die Legitimität von SMRs zu stärken, während die Verbesserung der Glaubwürdigkeit - eine weitere wichtige Voraussetzung für die erfolgreiche Konstruktion von Versprechen - gerade erst begonnen hat. Die wachsende Zahl von SMR-bezogenen Artikeln deutet auf einen zunehmenden Hype hin, aber das Fehlen einer entsprechenden 'Hype-Sprache' legt nahe, dass die beträchtliche Medienaufmerksamkeit nicht automatisch zu einer verstärkten Medienberichterstattung und einem diskursiven Hype führt

Indoor Localization Solutions for a Marine Industry Augmented Reality Tool

In this report are described means for indoor localization in special, challenging circum-stances in marine industry. The work has been carried out in MARIN project, where a tool based on mobile augmented reality technologies for marine industry is developed. The tool can be used for various inspection and documentation tasks and it is aimed for improving the efficiency in design and construction work by offering the possibility to visualize the newest 3D-CAD model in real environment. Indoor localization is needed to support the system in initialization of the accurate camera pose calculation and auto-matically finding the right location in the 3D-CAD model. The suitability of each indoor localization method to the specific environment and circumstances is evaluated.Siirretty Doriast

Large-scale memristive associative memories

Associative memories, in contrast to conventional address-based memories, are inherently fault-tolerant and allow retrieval of data based on partial search information. This paper considers the possibility of implementing large-scale associative memories through memristive devices jointly with CMOS circuitry. An advantage of a memristive associative memory is that the memory elements are located physically above the CMOS layer, which yields more die area for the processing elements realized in CMOS. This allows for high-capacity memories even while using an older CMOS technology, as the capacity of the memory depends more on the feature size of the memristive crossbar than on that of the CMOS components. In this paper, we propose the memristive implementations, and present simulations and error analysis of the autoassociative content-addressable memory, the Willshaw memory, and the sparse distributed memory. Furthermore, we present a CMOS cell that can be used to implement the proposed memory architectures.</div

Depth sensors in augmented reality solutions. Literature review

The emergence of depth sensors has made it possible to track – not only monocular cues – but also the actual depth values of the environment. This is especially useful in augmented reality solutions, where the position and orientation (pose) of the observer need to be accurately determined. This allows virtual objects to be installed to the view of the user through, for example, a screen of a tablet or augmented reality glasses (e.g. Google glass, etc.). Although the early 3D sensors have been physically quite large, the size of these sensors is decreasing, and possibly – eventually – a 3D sensor could be embedded – for example – to augmented reality glasses. The wider subject area considered in this review is 3D SLAM methods, which take advantage of the 3D information available by modern RGB-D sensors, such as Microsoft Kinect. Thus the review for SLAM (Simultaneous Localization and Mapping) and 3D tracking in augmented reality is a timely subject. We also try to find out the limitations and possibilities of different tracking methods, and how they should be improved, in order to allow efficient integration of the methods to the augmented reality solutions of the future.Siirretty Doriast

Depth sensors in augmented reality solutions. Literature review

The emergence of depth sensors has made it possible to track – not only monocular cues – but also the actual depth values of the environment. This is especially useful in augmented reality solutions, where the position and orientation (pose) of the observer need to be accurately determined. This allows virtual objects to be installed to the view of the user through, for example, a screen of a tablet or augmented reality glasses (e.g. Google glass, etc.). Although the early 3D sensors have been physically quite large, the size of these sensors is decreasing, and possibly – eventually – a 3D sensor could be embedded – for example – to augmented reality glasses. The wider subject area considered in this review is 3D SLAM methods, which take advantage of the 3D information available by modern RGB-D sensors, such as Microsoft Kinect. Thus the review for SLAM (Simultaneous Localization and Mapping) and 3D tracking in augmented reality is a timely subject. We also try to find out the limitations and possibilities of different tracking methods, and how they should be improved, in order to allow efficient integration of the methods to the augmented reality solutions of the future.Siirretty Doriast

Evaluation of the GPS Accuracy of Tablets

Augmented Reality (AR) applications often require knowledge of the user’s position in some global coordinate system in order to draw the augmented content to its correct position on the screen. The most common method for coarse positioning is the Global Positioning System (GPS). One of the advantages of GPS is that GPS receivers can be found in almost every modern mobile device. This research was conducted in order to determine the accuracies of different GPS receivers. The tests included seven consumer-grade tablets, three external GPS modules and one professional-grade GPS receiver. All of the devices were tested with both static and mobile measurements. It was concluded that even the cheaper external GPS receivers were notably more accurate than the GPS receivers of the tested tablets. The absolute accuracy of the tablets is difficult to determine from the test results, since the results vary by a large margin between different measurements. The accuracy of the tested tablets in static measurements were between 0.30 meters and 13.75 meters.Siirretty Doriast

Talouspakotteet ja niiden onnistuminen: case Venäjä

Firstly, the article reviews the existing literature on economic sanctions. An influential study by Hufbauer (et. al 1990) based on analysis of 115 sanctions highlighted conditions for sanctions success and took a more positive view on success of sanctions than previous academic consensus. Since then, its methodology has been criticized from many angles. Economic sanctions have also transformed into targeted sanctions in order to avoid adverse humanitarian effects such as in Iraq after the Gulf War. The effects of Western sanctions on Russian economy are hard to discern from the concurrent collapse of crude oil price while the stated political objectives remain to be achieved. Russian countersanctions ban of food imports from the sanctioning countries hit Finland harder than most other EU countries, but they are helping Russia to increase agricultural production and meet self- sufficiency policy goals. Secondly, the article presents a case study of the effects of the Russian countersanctions on Finnish economy. Early on, the episode was referred to as “economic war” and by using discourse analysis this paper studies how this “war” was presented to Finnish audiences by the decision makers and media, including a special focus on farmers and milk production

Tilakohtainen kasvihuonekaasupäästöjen laskenta Taloustohtorissa

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