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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Utvärdering av miljön i området Torparängen med laserskanning / Evaluation of the environment in the area Torparängen with laser scanning

Lundström, Fredrik January 2017 (has links)
Rapportens syfte är att få reda på om utvändig laserskanning av en byggnad är en lämplig metod att använda för byggbranschen. En laserskanning kommer göras av torpet Furutå, i området Toparängen, som ligger i Växjö. Laserskanningen har gjorts genom att tre uppställningar med skannern har genomförts. Denna data sammanfogas sedan i programmet Leica Cyclone. Sedan bearbetas modellen i Autodesk Recap och AutoCAD. Här skapas sedan 2D-ritningar av fasader och även en 3D-modell. Laserskanningen kommer även georefereras, vilket innebär att modellen flyttas från ett lokalt koordinatsystem till svenska referenssystemet SWEREF99. Studien visar på att laserskanning har ett brett användningsområde och med tillräckligt låg mätosäkerhet.
2

Určení prostorového tvaru stavební konstrukce pomocí laserového skenování / Determination the spatial shape structures using laser scanning

Sikorová, Lucie January 2016 (has links)
The aim of this work is to create a 3D models of the structures of data acquired by laser scanning. The tracking data are elaborated by software Scene and models were created in AutoCAD, Revit and SketchUP. The main output of this work are three models of the two structures.
3

Laserskanning av Södra Climate Arena / Laser scanning of Södra Climate Arena

Rydberg, Erik, Johannesson, Andreas January 2016 (has links)
Rapporten går ut på att se om laserskanning är en bra metod att använda sig av vid ombyggnation, tillbyggnad och renovering. För att få fram ett svar på detta har två takbalkar i Södra Climate Arena skannats av. Vid genomförandet användes en laserskanner från Leica av varianten P30. Försöket innehåller fyra stycken uppställningar som riktas mot sex stycken måltavlor. Informationen som fåtts ut från skanningen i form av en sektion i AutoCAD har jämförts med befintliga ritningar för att se om informationen från skanningen stämmer överens med ritningarna. I modellen som fåtts ut från försöket har också mätning och undersökning skett för att se hur bra det går att mäta i modellen och om det är något som fungerar lätt att använda sig av i praktiken. Arbetet går även ut på att få en god inblick i hur laserskannern Leica P30 fungerar.
4

A Study of Reconfigurable Antennas as a Solution for Efficiency, Robustness, and Security of Wireless Systems

Mehmood, Rashid 01 June 2015 (has links) (PDF)
The reconfigurable aperture (RECAP) is a reconfigurable antenna consisting of a dense array of electronically controlled elements, which can be manipulated to support many antenna functions within a single architecture. RECAPs are explored herein as an enabling technology for future software defined and cognitive radio architectures, as well as compact wireless devices supporting many bands and services. First, the concept of a parasitic RECAP is developed and analyzed for various communication applications. This begins with the analysis of existing RECAP topologies (e.g. planar and parasitic) using a hybrid method combining full wave simulations and network analysis. Next, a performance versus complexity analysis is performed to assess the use of a parasitic RECAP for the most critical communications functions: pattern synthesis, MIMO communications and physical-layer wireless security. To verify simulation results, a prototype parasitic RECAP is also built and deployed in real propagation environments. Given the potential of adaptive and reconfigurable architectures for providing enhanced security, an idealized reconfigurable antenna is analyzed, resulting in the concept of secure array synthesis. The objective is to find optimal array beamforming for secure communication in the presence of a passive eavesdropper in a static line-of-sight (LOS) channel. The method is then extended to the case of multipath propagation environments. The problem is solved by casting it into the form of a semi-definite program, which can be solved with convex optimization. The method is general and can be applied to an arbitrary array topology with or without antenna mutual-coupling. Due to complexity of the problem, initial attention has been restricted to idealized reconfigurable antennas (smart antennas), where excitation amplitude and phase at each element can be controlled independently. Lastly, reconfigurable antennas are investigated as a solution to support the emerging application of over-the-air (OTA) testing in a low-cost and compact way, resulting in the concept of the reconfigurable over-the-air chamber (ROTAC). First, an idealized two-dimensional ROTAC is analyzed, revealing that the fading distribution, spatial correlation, frequency selectivity, and multipath angular spectrum can be controlled by proper specification of the random loads. Later, a prototype of ROTAC is built to study the fading statistics and angular characteristics of the multipath fields inside a practical chamber.
5

A Reticulation of Skin-Applied Strain Sensors for Motion Capture

Schroeck, Christopher A. 12 June 2019 (has links)
No description available.
6

Srovnání nákladů rodinných domů s nosnou konstrukcí z tenkostěnných ocelových profilů / Cost comparison of family houses with structures of thin-walled steel profiles

Pozděnová, Barbora January 2015 (has links)
The aim of this thesis is to find the best option of the building technology for a house. The thesis is divided into two sections – theoretical and practical. The theoretical section consists of three parts. The first part deals with theory of costs and pricing. Second part specifies types of the budgeting used in Czech Republic and the last part is focused on description of the selected construction systems used for building a house. Second section deals with description and the layout of the house, for which three budgets are set with a respect to the used option of the construction system. Furthermore, a comparison of the technical parameters as well as the costs analysis according to the TSKP is made. Finally, the optimal variant is selected with respect to the price and technical properties.

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