Wyniki wyszukiwania - Biblioteka Nauki

1

Combined SNOM/AFM microscopy with micromachined nanoapertures

100%

Radojewski J. , Grabiec P.

Materials Science

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2003

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tom Vol. 21, No. 3

319-332

EN

We describe a new combined SNOM/AFM cantilever probe with the aperture FIB micromachined in a hollow metal pyramid fabricated on its end. The cantilever can be used in a microscopy set-up with the optical or piezoresitive AFM detection system. A processing sequence proposed in the article offers a high reproducibility in batch processing typical of semiconductor technology. Morover, the angle of the apex cone is closed to 50° which renders it possible to obtain a high-aperture optical throughoutput. The probe construction, manufacturing and its basic optical parameters are described.

2

Optymalizacja efektywności energetycznej łącza radiowgo z przekaźnikiem

89%

Bossy B. , Kliks A. , Bogucka H.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2017

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tom nr 6

251--254, CD

PL

W niniejszym artykule przeanalizowane zostały różne tryby transmisji w łączu radiowym z przekaźnikiem, z perspektywy Efektywności Energetycznej (ang. Energy Efficiency - EE). Przedstawiono wzory na optymalną moc alokowaną na podnośne OFDM dla każdego rozpatrywanego trybu transmisji. Dzięki symulacji komputerowej pokazano zależności między rozpatrywanymi przypadkami.

EN

In this paper, various transmission modes in the radio link with relay from the perspective of Energy Efficiency (EE) have been examined. Formulas describing the optimum power allocated to the OFDM subcarriers have been shown. Through computer simulation, the relationships between transmission modes have been designated.

3

Assessment of relative-active tectonics in rhumel-smendou basin (ne Algeria) – observations from the morphometric indices and hydrographic features obtained by the digital elevation model

71%

Manchar N. , Hadji R. , Bougherara A. , Boufaa K.

Geomatics, Landmanagement and Landscape

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2022

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tom no. 4

47--65

EN

The eastern Tell Atlas of Algeria is characterized by a complex neotectonic system including lateral strike-slips, and normal and reverse faults. The landscape of the Neogene basin of MilaConstantine acquired its shape due to the perpetual action of tectonic activity, and erosion processes. Neo-tectonics in this basin have affected the geometry of the stream network and the contemporary landscape topography. Our methodology evaluates the active tectonics in this mountainous region by a combination of drainage network and geomorphic indices, namely, the basin-shape index (Bs), stream-length gradient (SL), hypsometric integral (HI), mountain front sinuosity (Smf), basin asymmetry factor (AF), and valley-floor ratio (Vf). The calculated values of the six measured geomorphic indices were used to differentiate the distribution of faults function as well as the relative tectonic activity in the study area. The obtained results from the GIS-based multi-criteria analysis of these indices consist of the index of active tectonics (IAT). Hence, we defined four hierarchic degrees of IAT, namely, very high (VH), high (H), moderate (M), and low (L). The relative active tectonics represents an obvious correlation between morpho-structural features, tectonic activities, and uplift rates. It selects the morphotectonic features and landforms that interpret the tectonic events in the study area. Our results prove that this approach discerns the most active regions related to the neo-tectonic action in the RhumelSmendou drainage basin. The combination of geomatics and field surveys highlights the cliffs which are still rising by using the drainage patterns, the landform model, and the mountain range shape.

4

Lead II electrocardiograph-derived entropy index for autonomic function assessment in type 2 diabetes mellitus

51%

Yang S. , Liao X. , Lin Y. , Chen J. , Wu H.

Biocybernetics and Biomedical Engineering

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2024

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tom Vol. 44, no. 3

513--520

EN

The aim of this study was to introduce and evaluate the baroreflex entropy index (BEI), a novel tool derived from standard lead II electrocardiograph (EKG) for autonomic function (AF) assessment in type 2 diabetes mellitus (T2DM). Researchers with distinct roles (analysis and data preparation) analyzed anonymized EKG data from healthy controls and two patient groups with T2DM (well controlled and poorly controlled). BEI was compared between groups, and correlations with glycemic markers (HbA1c, fasting glucose) were investigated. Logistic regression was used to assess the association between BEI and T2DM risk. BEI showed good repeatability and differentiation between groups. Notably, it required only single-lead EKG. BEI was inversely correlated with glycemic markers, suggesting improved baroreflex regulation with better glycemic control. BEI also out-performed small-scale multiscale entropy in group discrimination. Logistic regression identified BEI as a protective factor for T2DM. BEI represents a promising tool for monitoring AF, assessing glycemic control, and potentially stratifying T2DM risk. Further validation in larger longitudinal studies and an exploration of the applicability of BEI to other diseases are warranted.