ULEPSZONA METODA IDENTYFIKACJI RODZAJU RUCHU WYKORZYSTUJĄCA SENSORY URZĄDZENIA MOBILNEGO

This paper presents an application of built-in sensors of a mobile device – a more robust version of authors’ own motion type detection method introduced in previous work. Use of accelerometer and magnetometer for recording acceleration in the World’s coordinate system is explained. The original results and identification criteria are briefly described. New tests and their results are presented. An improved version of the motion type identification method is introduced.Artykuł przedstawia zastosowanie sensorów urządzeń mobilnych – bardziej rozbudowaną wersję autorskiej metody identyfikacji rodzaju ruchu. Metoda ta została zaproponowana we wcześniejszej pracy. Krótko omówione zostało zastosowanie akcelerometru i magnetometru do pomiaru przyspieszenia we współrzędnych świata. Przedstawiono wyniki wstępnych pomiarów razem z oryginalnymi kryteriami rozpoznawania ruchu. Opisano nowe przeprowadzone eksperymenty i ich wyniki. Zaproponowano ulepszoną wersję metody rozpoznawania rodzaju ruchu

Electronic Structure and X-Ray Photoemission Spectra of MPtSn (M = Ti, Zr, Hf)

The electronic structures of the half-Heusler isostructural compounds TiPtSn, ZrPtSn and HfPtSn were calculated and measured applying the X-ray photoemission spectroscopy. The (Ti, Zr, Hf)PtSn compounds have gaps between the occupied valence band and the empty conduction band, calculated as about 0.75, 1.12, and 1.09 eV, respectively. The calculations were done by the full-potential local orbitals method in the framework of the local spin-density approximation and partly also by the full-potential linear mu±n-tin orbitals method by the LmtART code. Experimental X-ray photoemission spectra were measured using photons of en- ergy of 1486.6 eV. The experimental and calculated spectra match quite well except a small shift in the energy scale

Wiek osadów międzyglinowych na lewym brzegu Warty w Poznaniu w świetle badań palinologicznych

The main aim of this article was to estimate the time of accumulation of organic sediments from Eemian interglacial, found in inter-clay layers. Palynological analysis was done for the samples of sediments. They were taken within the area of Poznań at the sites of geotechnical and geological research. Rebuilding of city-stadium in Bułgarska street was a good opportunity to core the organic sediments interlying the morainic clays which were accumulated during the Mazovian and Vistulian glaciation. Layers lying between the clays contain organic material very often and this was the case this time. Palynological analysis revealed accumulation of these organic sediments during the 5th and 6th period of Eemian Interglacial according to the biostratygraphical classification of Tobolski (1991).A6110511

The dimensions of the sphenoid sinuses: evaluation before the functional endoscopic sinus surgery

Background: The following study aimed to evaluate the dimensions (anteroposterior, transverse and vertical) of the sphenoid sinuses in the adult population. Materials and methods: The study was conducted as a retrospective analysis of the computed tomography (CT) scans of the paranasal sinuses of 296 patients (147 females and 149 males), who did not present any pathology in the sphenoid sinuses. The CT scans of the paranasal sinuses were done with the spiral CT scanner, without using any contrast medium. After obtaining transverse planes, frontal and sagittal planes were created using secondary reconstruction tool. Results: The anteroposterior dimension was found to be 2.65 cm on average, in the range of 0.5–4.3 cm. The transverse dimension was on average 1.98 cm, ranging from 0.5 cm to 4.9 cm. The average vertical dimension was found to be 2.1 cm, in the range of 0.7–3.7 cm. Conclusions: Due to the high incidence of the anatomical variants of the paranasal sinuses, a CT scan is recommended in all patients before a planned surgery in order to avoid the potential iatrogenic complications. Dimensions of the sphenoid sinuses might point towards more at risk variants, but there is still a substantial amount of research that needs to be done in that aspect

The height and type of the main septum in the sphenoid sinuses : evaluation before the fess

The purpose of this study was to examine the height of the main septum (MS) in the sphenoid sinuses and its type, depending on the percentage prevalence of its tissue composition (osseous and membranous) in the adult population. Materials and Methods: A retrospective analysis of 296 computed tomography (CT) scans (147 females, 149 males) of the paranasal sinuses was conducted. The patients did not present any pathology in the sphenoid sinuses. The CT scans of the paranasal sinuses were carried out with a spiral CT scanner (Siemens Somatom Sensation 16) in a standard procedure, in the option Siemens CARE Dose 4D. No contrast medium was used. Having obtained the transversal planes, a secondary reconstruction tool (multiplans reconstruction - MPR) was used in furtherance of gleaning sagittal and frontal planes. Results: In all cases, the height of the MS was measured by using a straight line running parallel to the course of the septum (when the MS was regarded as straight) or curved (when the MS was regarded as irregularly shaped). The average height of the MS was 2.1 ± 0.41 cm in the whole research group. Completely osseous MS was found in 32.77% of the patients. In 63.85% of them, the MS was partially membranous. The rarest was the MS which was not even partially ossified - a membranous type, that was observed in 3.38% of the patients. Conclusions: Variant anatomy of the paranasal sinuses may lead to complications encountered during a surgery, hence a CT scan is advised before the planned treatment

Andreev reflection study of a new magnetic superconductor Mo3Sb7 in magnetic field

Andreev reflection in contacts based on a magnetic superconductorMo3Sb7in magnetic field has been investigated by the point-contact method. It is found that the behavior of the order parameter in the magnetic field Δ(H) is essentially dependent on the value of Δ, which varies widely (Δ(0,0) ≈ 0.01-0.31meV) for different contacts at practically invariant Tc. At high the dependence max(H)deviates slightly from the theoretical prediction applicable under the point-contact conditions. As the order parameter decreases, the deviation starts to increase and becomes very large when Δ approaches its minimum. Proceeding from the results obtained in this study and from the temperature measurements on Mo3Sb7performed formerly, we are inclined as before to assign the compound to the class of superconductors with anisotropic gap function. So, in no way can it be considered as conventional BCS-type superconductor. The upper critical field Hc2 ≈16.5 kOe found here is close to that obtained from magnetization measurements in another study. According to the estimation performed, the pair-breaking effect of the Pauli paramagnetism is rather weak in Mo3Sb7