Coherent detection method of gravitational wave bursts for spherical antennas

We provide a comprehensive theoretical framework and a quantitative test of the method we recently proposed for processing data from a spherical detector with five or six transducers. Our algorithm is a trigger event generator performing a coherent analysis of the sphere channels. In order to test our pipeline we first built a detailed numerical model of the detector, including deviations from the ideal case such as quadrupole modes splitting, and non-identical transducer readout chains. This model, coupled with a Gaussian noise generator, has then been used to produce six time series, corresponding to the outputs of the six transducers attached to the sphere. We finally injected gravitational wave burst signals into the data stream, as well as bursts of non-gravitational origin in order to mimic the presence of non-Gaussian noise, and then processed the mock data. We report quantitative results for the detection efficiency versus false alarm rate and for the affordability of the reconstruction of the direction of arrival. In particular, the combination of the two direction reconstruction methods can reduce by a factor of 10 the number false alarms due to the non-Gaussian noise.Comment: 31 pages, 15 figure

Influence of a bark-filler on the properties of PLA biocomposites - dataset

In this study, WPC composites made of PLA and a bark-filler were manufactured. Two degrees of bark comminution (10 – 35 mesh and over 35 mesh) and varied content of bark (40, 50 and 60%) were investigated. The studied panels were compared with analogically manufactured HDPE boards. The manufacture of composites involved two stages: at first, WPC granules with the appropriate formulation were produced using the extruder (temperatures in individual extruder sections were 170°C - 180°C) and crushing at hammer mill after cooling the extruded composite; secondly, the obtained granulate was used to produce boards with nominal dimensions of 300x300x2.5 mm3 by flat pressing in a mold, using a single-shelf press at a temperature 200oC. The study proved that comminuted bark can be applied as a filler in PLA composites. However, an increase in bark content decreased mechanical properties (MOR, MOE) and deteriorated humidity resistance (high TS and WA) of the panels. Along with the increase in bark content, an increase in the contact angle of the composite surfaces and a decrease in the total surface energy were noted. It was also found that PLA composites have higher strength parameters and lower moisture resistance compared to HDPE composites with the same bark content. content.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Data for: Performance properties of plywood composites reinforced with carbon fibers

Uploaded data presents results of physical and mechanical properties of layered wood composite reinforced with carbon fiber where the MUF resins were used as a binder. Hypothesis of the study assumes that addition of carbon fibers to wood-layer panels bonded with MUF resin improves mechanical and physical properties of the panels and that orientation of CF in the composite panels affects mechanical and physical properties of the panel.The investigation included 5 variants: PE - Parallel structure/ external system; PI - Parallel structure/ internal system; CE - Cross structure/ external system; CI - Cross structure/ internal system, and RE - Reference plywood (industrial type). The following mechanical properties of manufactured composites were tested: modulus of rapture (MOR) and modulus of elasticity (MOE) were tested based on the EN 310 standard; internal bound (IB) according to EN 319 standard; screw withdrawal strength (SH) according to EN 320 standard, and physical properties of manufactured composites: thickness swelling after 2 and 24 hours of soaking in water; water absorption after 2 and 24 hours of soaking in water. Additionally cutting resistance was tested. Each test was repeated at least 10 times. Results showed that reinforcing plywood panels with carbon fibers increased both MOR and MOE. The cutting resistance showed better results for composite panels with CF in a perpendicular orientation. Moreover, the water uptake and thickness swelling after 24 hours showed better results for fibers in the core layer, either parallel or perpendicular.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Lignocellulosic biomass from grapevines as raw material for particleboard production

Uploaded data presents results of research on mechanical and physical properties of particleboards made with the addition of pruned material from the grapevines – vine pruning waste.The hypothesis of the study assumes that vine pruning waste may be successfully applied as an alternative feedstock in particleboard production. The investigation included 8 variants: A – particleboard with density 650 kg/m3, without particles from vine pruning; B – particleboard with density 650 kg/m3, with 25% share of particles from vine pruning; C – particleboard with density 650 kg/m3, with 50% share of particles from vine pruning; D – particleboard with density 650 kg/m3, with 100% share of particles from vine pruning; E – particleboard with density 550 kg/m3, without particles from vine pruning; F – particleboard with density 550 kg/m3, with 25% share of particles from vine pruning; G – particleboard with density 550 kg/m3, with 50% share of particles from vine pruning; H – particleboard with density 550 kg/m3, with 100% share of particles from vine pruning. The following mechanical properties of manufactured composites were tested: modulus of rapture (MOR) and modulus of elasticity (MOE) were tested based on the EN 310 standard; internal bound (IB) according to EN 319 standard, and physical properties of manufactured composites: thickness swelling and water absorption after 2 and 24 hours of soaking in water. Additionally susceptibility to drilling was tested. Each test was repeated at least 10 times.The results revealed that the share of vine pruning waste is one of the main factors determining the strength properties of manufactured boards. It affected both the mat thickening process as well as the reduction of strength properties. The results showed that the 50% share of vine pruning waste enables the production of boards that meet the minimum requirements of strength properties specified in the EN 312 standard for boards with a density of 650 kg/m3. However, boards with a density of 550 kg/m3 entirely made with vine pruning waste met the minimum requirements of strength properties specified in the standard EN 16368. In addition, the share of pruned material reduces swelling and water absorption after 2 and 24 hours soaking in water. The share of vine pruning waste reduced axial forces during drilling.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV