Search results for "MC"
showing 10 items of 2122 documents
Wpływ warunków prowadzenia eksperymentu na wyniki badań biomonitoringowych z zastosowaniem mchów
2017
Izmaiņas neironu mielinizācijas un apoptozes procesos eksperimentāla išēmiska insulta subakūtajā stadijā
2021
Viens no galvenajiem nāves cēloņiem pasaulē ir išēmisks insults. Tā akūtā stadijā novēro apoptozi, programmēto neironu nāvi, kā arī to mielinizācijas traucējumus. Taču trūkst dati par to, vai šie patoloģiskie procesi notiek arī išēmiska insulta subakūtajās stadijās. Šī darba mērķis bija noskaidrot filamenta izraisītas vidējās smadzeņu artērijas oklūzijas (fMCAo) efektus uz apoptozē un neironu mielinizācijā iesaistīto proteīnu (kaspāzes-3 un mielīna bāzes proteīna) ekspresiju kontroles un išēmiska insulta modeļdzīvnieku smadzenēs subakūtā stadijā pēc fMCAo. Rezultāti parāda, ka 2 mēnešus pēc fMCAo išēmiska insulta modeļdzīvnieku išēmijas serdes un penumbra zonā būtiski samazinājusies neironu…
Min-Type Control Strategy of a DC-DC Synchronous Boost Converter
2019
International audience; This paper presents the analysis and design of a min-type strategy to control a synchronous boost converter in continuous conduction mode. The strategy uses a nonlinear switching surface to establish the change of topology in the converter and is analyzed by means of a sliding-mode control approach. Subsequently, the min-type strategy is modified by a hybrid control formulation, which introduces a hysteresis width and a dwell-time to obtain a finite switching frequency in the start-up and steady-state respectively. The hybrid control formulation is implemented digitally by means of a microprocessor which processes the samples of inductor current and capacitor voltage…
Localization of Multi-Class On-Road and Aerial Targets Using mmWave FMCW Radar
2021
mmWave radars play a vital role in autonomous systems, such as unmanned aerial vehicles (UAVs), unmanned surface vehicles (USVs), ground station control and monitoring systems. The challenging task when using mmWave radars is to estimate the accurate angle of arrival (AoA) of the targets, due to the limited number of receivers. In this paper, we present a novel AoA estimation technique, using mmWave FMCW radars operating in the frequency range 77–81 GHz by utilizing the mechanical rotation. Rotating the radar also increases the field of view in both azimuth and elevation. The proposed method estimates the AoA of the targets, using only a single transmitter and receiver. The measurements are…
Classification of Targets Using Statistical Features from Range FFT of mmWave FMCW Radars
2021
Radars with mmWave frequency modulated continuous wave (FMCW) technology accurately estimate the range and velocity of targets in their field of view (FoV). The targeted angle of arrival (AoA) estimation can be improved by increasing receiving antennas or by using multiple-input multiple-output (MIMO). However, obtaining target features such as target type remains challenging. In this paper, we present a novel target classification method based on machine learning and features extracted from a range fast Fourier transform (FFT) profile by using mmWave FMCW radars operating in the frequency range of 77–81 GHz. The measurements are carried out in a variety of realistic situations, including p…
Passive Biomonitoring of Influence of the Communication Traffic on Deposition the Pollution Near the Motorway
2019
W pracy przedstawiono wyniki badań, przeprowadzonych w ramach biomonitoringu pasywnego, polegających na ocenie depozycji metali ciężkich (Ni, Cu, Zn, Cd, Hg i Pb), wzbogacających lokalnie aerozol atmosferyczny w skutek ruchu komunikacyjnego na autostradzie A4 w pobliżu miejscowości Prószków (województwo opolskie). Do badań wykorzystano próbki mchów Pleurozium schreberi, które pobrano w pobliżu autostrady na dystansie 3000 m i w odległości od niej do 120 metrów. Przy wyborze punktów pomiarowych uwzględniono częstotliwość kierunku wiatru na tym terenie. Metale ciężkie oznaczono metodą absorpcyjnej spektometrii atomowej ze wzbudzaniem w płomieniu (F-AAS). Wyniki badań wskazują na to, iż ruch k…
The use of neutron activitacion analysis in the biomonitoring of trace element deposition in the Opole province
2013
Metodą neutronowej analizy aktywacyjnej oznaczono stężenia 42 pierwiastków: Na, Mg, Al, Cl, K, Ca, Sc, V, Cr, Mn, Fe, Ni, Co, Zn, As, Se, Br, Rb, Sr, Zr, Nb, Mo, I, Ag, Cd, Sb, Ba, Cs, La, Ce, Nd, Sm, Eu, Tb, Yb,Hf, Ta, W, Au, Hg, Th i U, zakumulowanych w mchach pobranych do badań we wrześniu i w październiku 2011 roku na terenie województwa opolskiego (południowa Polska). Próbki różnych gatunków mchów pobierano w bliskiej odległości od miejsc przecięcia linii siatki kartograficznej naniesionych na mapę województwa. Odległości pomiędzy punktami wynosiły ok. 20 km. Analiza wyników badań umożliwiła wskazanie miejsc zwiększonej depozycji zanieczyszczeń wraz ze wskazaniem potencjalnych źródeł i…
Calibration of the underground muon detector of the Pierre Auger Observatory
2021
To obtain direct measurements of the muon content of extensive air showers with energy above $10^{16.5}$ eV, the Pierre Auger Observatory is currently being equipped with an underground muon detector (UMD), consisting of 219 10 $\mathrm{m^2}$-modules, each segmented into 64 scintillators coupled to silicon photomultipliers (SiPMs). Direct access to the shower muon content allows for the study of both of the composition of primary cosmic rays and of high-energy hadronic interactions in the forward direction. As the muon density can vary between tens of muons per m$^2$ close to the intersection of the shower axis with the ground to much less than one per m$^2$ when far away, the necessary bro…
Decompression induces inflammation but do not modify cell proliferation and apoptosis in odontogenic keratocyst
2022
Background Odontogenic keratocyst (OKC) is a development cyst, of odontogenic origin, that differs from other entities by its infiltrating and aggressive biological behavior. Among conservative treatments for large lesions, surgical decompression stands out, with a variable recurrence rate. Aim: To evaluate the histological effects of decompression treatment on OKC, including cell proliferation and apoptosis of epithelial cyst. Material and Methods 21 OKC cases were included. Samples were taken before and after surgical decompression for histological evaluation and immunohistochemical staining of Ki-67, MCM4/7, Bax and Bcl2. Data were analyzed and compared using Student’s t and Wilcoxon tes…
Fertility in McCune Albright syndrome female: A case study focusing on AMH as a marker of ovarian dysfunction and a literature review.
2021
Abstract Background The molecular basis of McCune Albright syndrome (MAS) is a recurrent GNAS Postzygotic gain of function sporadic mutation, resulting in a mosaic disease. Most of girls present precocious puberty, caused by the development of recurrent ovarian cysts with autonomous Hyperestrogenic stimulation. After menarche, the majority of patients with ovarian GNAS mutation have menstrual disturbances and infertility. Objectives We wanted to focus on the fertility of MAS females and propose an appropriate management, by a detailed case report and an exhaustive review of the literature on fertility and pregnancy in MAS females. Results We present the case of a 29-year-old MAS female, who…