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The purpose of the study was to determine the impact of thermo-mechanical treatment on absorption and absorption speed of iroko (Milicia exelsa (Welw.) C.C. Berg) and tauari (Couratari spp.) wood. Wood was densified in a hydraulic press in the radial direction at 100 oC and 150 oC. The modification temperature had greater impact on the density of tauari wood than on the density of iroko wood. Water...
This paper summarizes the work performed within the Polish applied research project THzOnLine aiming at multipixel THz detectors based on selective NMOS transistors and its application in biology, medicine and security systems, completed in 2016. It starts with presentation of techniques applied for increasing the efficiency of THz detectors, i.e. used to maximize the output voltage yielded from NMOS-based...
In this work the complete system for THz measurements is presented and briefly described. Proposed solution allows to avoid the most important disadvantages of the lock-in technique without compromising the noise parameters of the developed readout system. The prototype, designed and tested by the authors, supports the pixel line of FET-based THz detectors. The system consists of the hardware part...
Niniejszy artykuł dotyczy opracowania kompletnej sieci czujnikowej oferującej wielopunktowy pomiar temperatury lub też temperatury i wilgotności, przewidzianej do zastosowania w budownictwie. Sieć, o której mowa, powstała jako jedno z zadań projektu badawczego finansowanego z Siódmego Programu Ramowego Komisji Europejskiej - SESBE (Smart Elements for Sustainable Building Envelopes -FP7-2013-NMP-ENV-EeB...
This paper addresses the work performed on development of the readout circuits for FET-based THz detectors. Ultimately, designed readout system is intended to work within the material identification equipment, which targeted to perform the spectral recognition of samples. At the beginning, the short introduction of the THz detection basics and main applications of the THz spectroscopy are presented...
This paper deals with design and testing process of the pressure and temperature measurement system for aerodynamic tunnel, named SIESTA (System of Intelligent Sensors for Experimental Avionic Applications), announced in [1]. The system comprises three main components: the hardware part, the embedded software for microcontroller and the measurement program (for LabVIEW environment).
Local reinforcement of naturally defected structural lumber. Paper presents local reinforcement of structural lumber, reducing negative impact of natural wood defects (especially knots), on strength parameters. Local repair engineering allows usage of structural members of decreased strength caused by natural defects, which was previously impossible because of legal regulations and risk of collapse...
Effect of variable temperature and moisture content conditions on selected properties of wood-CFRP composite Intended structural application of wood-CFRP composite requires analysis of its properties in time function, including environmental conditions changes. The paper presents results of selected mechanical and physical properties of composite, using artificial aging methods. It was shown that...
Principles of lifelong learning in woodworking industry. Lifelong learning of adults is regarded as a one of the most important factors of social development and economic growth. Definitions like “knowledge society” or “knowledge-based economy” are in operation in many Polish and EU preparations or documents. They are regarded as modern reality, but are also challenge and program of the future. In...
Possibilities of single-stage pressing of veneered particleboards. Following work describes possibility of single-stage pressing of veneered particleboards. Three variants of the 16mm thick boards of 620kg/m3 density were manufactured for the test: (1) single-layer particleboard, (2) single-layer double-stage pressed veneered particleboard (3) single layer single-stage pressed veneered particleboard...
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