Filters
total: 2525
filtered: 1983
-
Catalog
Chosen catalog filters
displaying 1000 best results Help
Search results for: RATS
-
A compact seven-section rat-race hybrid coupler incorporating pbg cells
PublicationA conventional rat-race coupler has been doubly miniaturized: (i) characteristic impedances and electrical lengths of microstrip sections have been adequately modified as the first step of size reduction and (ii) T-shaped PBG cells have been implemented to diminish strip section length as the second step of circuit rat-race couplerminiaturization. The experimental results show good agreement with theoretical characteristics. Furthermore,...
-
A method of RTS noise identification in noise signals of semiconductor devices in the time domain
PublicationIn the paper a new method of Random Telegraph Signal (RTS) noise identification is presented. The method is based on a standardized histogram of instantaneous noise values and processing by Gram-Charlier series. To find a device generating RTS noise by the presented method one should count the number of significant coefficients of the Gram-Charlier series. This would allow to recognize the type of noise. There is always one (first)...
-
Effect of sweet grass extract against oxidative stress in rat liver and serum
Publication -
Green tea protects against ethanol-induced lipid peroxidation in rat organs
Publication -
Molecular Characterization of Growth Hormone-producing Tumors in the GC Rat Model of Acromegaly
Publication -
Evaluation of Analytes Characterized with Potential Protective Action after Rat Exposure to Lead
Publication -
Comparison of Three Extraction Approaches for the Isolation of Neurotransmitters from Rat Brain Samples
Publication -
Novel structure and EM-driven design of miniaturized microstrip rat-race coupler
PublicationIn this paper, a novel structure and design procedure of a miniaturized microstrip rat-race coupler (RRC) is described. Small size of the RRC is achieved by folding the transmission lines of the conventional circuit into its interior, as well as by implementation of the structure on three layers. The final size of the coupler realized for the operating frequency of 1 GHz is only 220 mm2, which gives over 95% footprint reduction...
-
Increased time varying heart rate and cardiovascular risk in hypertension – Benefit of selective I(f)channel inhibitor?
Publication -
TMSCL as a rate accelerating additive in acylations of amines with 5-(α- amino-α'-hydroxy)methylene meldrum's acids
PublicationAspects are presented of the acylation of amines, alcohols and thiols with 5-(α-amino- α'-hydroxy)methylene Meldrum's acids. We placed special emphasis on the acylation reaction of secondary amines with 5-(α-amino- α'-hydroxy)methylene Meldrum's acids, which, due to their basicity, caused problems concerning salt formation with a Meldrum acid derivative. We found that secondary amines, which react at the slowest rate and with a...
-
Experimental insights into consolidation rates during one-dimensional loading with special reference to excess pore water pressure
Publication -
Investigation of changes in the type B PLC effect of Al–Mg–Cu type alloy for various strain rates
Publication -
Investigation of changes in the type B PLC effect of Al-Mg-Cu type alloy for various strain rates
PublicationEfekt Portevina-LeChateliera ujawnia się w postaci skokowych zmian naprężenia w trakcie procesu odkształcenia próbek pewnych stopów. Zjawisko PLC występuje w kilku odmianach charakteryzujących się istotnymi różnicami zarówno w przestrzennym rozkładzie pasm odkształcenia jak też przebiegu krzywej naprężeniowej. Przebiegi odpowiadające różnym odmianom serration charakteryzują się odmiennymi właściwościami rozkładu energetycznego...
-
Electrochemical methods for corrosion rate determination under cathodic polarisation conditions - a review. Part II - AC methods
PublicationPrzedstawiono krytyczny przegląd prac dotyczących wykorzystania metod elektrochemicznych zmiennoprądowych do wyznaczania prądu korozyjnego metali polaryzowanych katodowo. Przedyskutowano stosowanie klasycznej liniowej spektroskopii impedancyjnej (EIS) z użyciem sygnałów pobudzających niskoamplitudowych, a następnie techniki zmiennoprądowe bazujące na sygnałach wysokoamplitudowych, a więc w zakresie nieliniowej charakterystyki polaryzacyjnej...
-
Electrochemical methods for corrosion rate determination under cathodic polarisation conditions - a review. Part I - DC methods
PublicationPrzedstawiono krytyczny przegląd prac dotyczących wykorzystania metod elektrochemicznych stałoprądowych do wyznaczania prądu korozyjnego metali polaryzowanych katodowo. Opisano dotychczasowe sposoby oceny skuteczności ochrony katodowej na podstawie pomiarów krzywych polaryzacji i rezystancji polaryzacyjnej. Scharakteryzowano metody matematyczne i oprogramowanie opracowane do analizy komputerowej krzywych polaryzacji w celu wyznaczenia...
-
Fluctuation in the organic matter decomposition rate and nitrogen speciation in vegetation and outside vegetation seasons in a hybrid wetland system.
PublicationIlość ścieków doprowadzana do obiektu była mniejsza, a stężenia zanieczyszczeń wyższe w okresie poza wegetacyjnym. Obniżona skuteczność przemian związków azotu w okresie poza wegetacyjnym została potwierdzona przez niższe wartości stałych szybkości reakcji, które wynosiły 60% wartości osiąganych dla okresu wegetacyjnego.
-
Boron-Enhanced Growth of Micron-Scale Carbon-Based Nanowalls: A Route toward High Rates of Electrochemical Biosensing
PublicationIn this study, we have demonstrated the fabrication of novel materials called boron-doped carbon nanowalls (B:CNWs), which are characterized by remarkable electrochemical properties such as high standard rate constant (k°), low peak-to-peak separation value (ΔE) for the oxidation and reduction processes of the [Fe(CN)6]3–/4– redox system, and low surface resistivity. The B:CNW samples were deposited by the microwave plasma-assisted...
-
The motion influence on respiration rate estimation from low-resolution thermal sequences during attention focusing tasks
PublicationGlobal aging has led to a growing expectancy for creating home-based platforms for indoor monitoring of elderly people. A motivation is to provide a non-intrusive technique, which does not require special activities of a patient but allows for remote monitoring of elderly people while assisting them with their daily activities. The goal of our study was to evaluate motion performed by a person focused on a specific task and check...
-
Tmscl as a rate accelerating additive in acylations of amines with 5-(α-amino- α'-hydroxy)methylene meldrum's acids
PublicationAspects are presented of the acylation of amines, alcohols and thiols with 5-(α-amino- α'-hydroxy)methylene Meldrum's acids. We placed special emphasis on the acylation reaction of secondary amines with 5-(α-amino- α'-hydroxy)methylene Meldrum's acids, which, due to their basicity, caused problems concerning salt formation with a Meldrum acid derivative. We found that secondary amines, which react at the slowest rate and with a...
-
ADAPTIVE PREDICTIONS OF THE EURO/ZŁOTY CURRENCY EXCHANGE RATE USING STATE SPACE WAVELET NETWORKS AND FORECAST COMBINATIONS
PublicationThe paper considers the forecasting of the euro/Polish złoty (EUR/PLN) spot exchange rate by applying state space wavelet network and econometric forecast combination models. Both prediction methods are applied to produce one-trading-day- ahead forecasts of the EUR/PLN exchange rate. The paper presents the general state space wavelet network and forecast combination models as well as their underlying principles. The state space...
-
Ammonia amendment promotes high rate lactate production and recovery from semi-continuous food waste fermentation
PublicationIn this study, a reliable approach using ammonia nitrogen was proposed to increase lactate production during semi-continuous food waste (FW) fermentation under mesophilic conditions. Both free ammonia nitrogen (FAN) and ammonium ion (NH4+-N) were present in mesophilic reactors, with a wide FAN/NH4+-N ratio variation due to the intermittent pH control. The investigation of responsible mechanisms revealed that the increased production...
-
Effect of boundary, shear rate and grain crushing on shear localization in granular materials within micro-polar hypoplasticity
PublicationW artykule przedstawiono wpływ 3 efektów na zachowanie się materiałów granulowanych: warunku brzegowego, prędkości ścinania oraz miażdżenia ziaren. Obliczenia wykonano przy pomocy mikropolarnego prawa hipoplastycznego rozszerzonego o efekt prędkości ścinania i miażdżenia ziaren w oparciu o teorię mechaniki zniszczenia. Szczególna uwagę zwrócono na rozkład lokalizacji odkształceń stycznych.
-
Comparison of protein precipitation methods for various rat brain structures prior to proteomic analysis
Publication -
Hydroxylamine attenuates the effects of simulated subarachnoid hemorrhage in the rat brain and improves neurological outcome
Publication -
Metabolic transformations of antitumor imidazoacridinone, C-1311, with microsomal fractions of rat and human liver
PublicationWykazano, że enzymatyczna aktywacja jest konieczna dla aktywności biologicznej pochodnej C-1311 (Symadex R), która znajduje się w II fazie badań klinicznych. Zbadano przemiany enzymatyczne tego związku w obecności frakcji enzymatycznych mikrosomalnych komórek wątroby szczura i ludzkiej. Badania te wykazały, że związek C-1311 jest bardziej podatny na przemiany w obecności frakcji mikrosomalnej niż S9 i cytozolowej. Inkubacja związku...
-
Metabolic transformations of antitumor imidazoacridinone, C-1311, with microsomal fractions of rat and human liver
Publication -
On Design Optimization of Miniaturized Microscrip Dual-Band Rat-Race Coupler with Enhanced Bandwidth
PublicationIn the paper, a novel topology of a miniaturized wideband dual-band rat-race coupler has been presented. Small size of the circuit has been obtained by meandering transmission lines of the conventional circuit. At the same time, the number of independent geometry parameters has been increased in order to secure sufficient circuit flexibility in the context of its design optimization for dual-band operation. Optimum dimensions of...
-
Novel structure and size-reduction-oriented design of microstrip compact rat-race coupler
PublicationIn this paper, a novel structure of a miniaturized microstrip rat-race coupler has been proposed. Surrogate-based optimization procedures are applied to explicitly reduce the coupler size while maintaining equal power split at the operating frequency of 1 GHz and sufficient bandwidth for return loss and isolation characteristics. The optimization is performed using the objective function with four penalty components. The footprint...
-
Identyfikacja i przetwarzanie cyfrowe sygnałów szumów RTS występujących w przyrządach półprzewodnikowych.
PublicationPrzedstawiono metody identyfikacji szumów RTS. Zaproponowano graficzną metodę identyfikacji tych szumów oraz sposób wyznaczania średnich czasów trwania inpulsów. Metodę oraz sposób wyznaczania średnich czasów trwania impulsów opisano na przykładzie oceny szumów własnych przyrządów półprzewodnikowych z zakresu małych częstotliwości.
-
A novel microstrip dual-layer rat-race coupler with compact size and enhanced bandwidth
PublicationMicrowave hybrid couplers are crucial components of mixers, phase shifters, amplifiers and other high-frequency systems. Conventional couplers are characterized by large size which limits their usefulness in modern applications. In this work, a novel compact rat-race coupler with enhanced bandwidth has been proposed. The structure consists of six compact microstrip resonant cells. It is implemented on two separate layers which permits...
-
Design of a compact planar transmission line for miniaturized rat-race coupler with harmonics suppression
PublicationThis paper presents an elegant yet straightforward design procedure for a compact rat-race coupler (RRC) with an extended harmonic suppression. The coupler’s conventional λ/4 transmission lines (TLs) are replaced by a specialized TL that offers significant size reduction and harmonic elimination capabilities in the proposed approach. The design procedure is verified through the theoretical, circuit, and electromagnetic (EM) analyses,...
-
Influence of feed rate on the granularity and homogenity of oak sawdust obtained during the sawing process on the frame sawing machine PRW15M
PublicationOpisano wpływ prędkości posuwu na skład granulometryczny i jednorodność trocin dębowych otrzymanych podczas procesu przecinania na pilarce ramowej PRW15M. Wykazano, że otrzymane trociny mogą być wykorzystane w produkcji produktów drewnopochodnych w ilości 75% dla posuwu 0.36 m/min i 82% przy posuwie 1.67 m/min. Pozostałe trociny stanowią odpad.
-
Gamma rays-assisted bacterial synthesis of bimetallic silver-selenium nanoparticles: powerful antimicrobial, antibiofilm, antioxidant, and photocatalytic activities
Publication -
An optimized controlled rate slow cooling protocol for bovine ovarian tissue cryopreservation by means of X-ray computed tomography
Publication -
Excess production of phage λ delayed early proteins under conditions supporting high Escherichia coli growth rates
Publication -
Association of Higher Rates of Type 2 Diabetes (T2DM) Complications with Psychological and Demographic Variables: Results of a Cross-Sectional Study
Publication -
Activation Energy and Inclination Magnetic Dipole Influences on Carreau Nanofluid Flowing via Cylindrical Channel with an Infinite Shearing Rate
PublicationThe infinite shear viscosity model of Carreau fluid characterizes the attitude of fluid flow at a very high/very low shear rate. This model has the capacity for interpretation of fluid at both extreme levels, and an inclined magnetic dipole in fluid mechanics has its valuable applications such as magnetic drug engineering, cold treatments to destroy tumors, drug targeting, bio preservation, cryosurgery, astrophysics, reaction kinetics,...
-
Optimization of FFF Process Parameters by Naked Mole-Rat Algorithms with Enhanced Exploration and Exploitation Capabilities
Publication -
Chronic Exposure to Fluoride Affects GSH Level and NOX4 Expression in Rat Model of This Element of Neurotoxicity
Publication -
Similarities and differences in affinity and binding modes of tricyclic pyrimido- and pyrazinoxanthines at human and rat adenosine receptors
Publication -
Effect of beta-blocker therapy on heart rate response in patients with hypertension and newly diagnosed untreated obstructive sleep apnea syndrome
Publication -
Influence of duration of Type 1 (insulin-dependent) diabetes mellitus on 24-h ambulatory blood pressure and heart rate profile
Publication -
Comparison of Wavelet Transform Modulus Maxima and Multifractal Detrended Fluctuation Analysis of Heart Rate in Patients with Systolic Dysfunction of Left Ventricle
Publication -
Differential scanning calorimetry for authentication of edible fats and oils - What can we learn from the past to face the current challenges?
Publication -
Pendant Proton-Relays Systematically Tune the Rate and Selectivity of Electrocatalytic Ammonia Generation in a Fe-Porphyrin Based Metal-Organic Framework
PublicationElectrocatalytic nitrite reduction (eNO2RR) is a promising alternative route to produce ammonia (NH3). Until now, several molecular catalysts have shown capability to homogeneously reduce nitrite to NH3, while taking advantage of added secondary-sphere functionalities to direct catalytic performance. Yet, realizing such control over heterogeneous electrocatalytic surfaces remains a challenge. Herein, we demonstrate that heterogenization...
-
Corrosion fatigue crack propagation rate characteristics for weldable ship and offshore steels with regard to the influence of loading frequency and seawater temperature
PublicationAfter Vosikovsky (1975), the corrosion fatigue crack growth rate (CFCGR) characteristics have been divided into three regions. The region-III rates are very close to mechanical fatigue crack growth rates. CFCGR formulae, including the long-crack length effect (in region I only), the loading frequency effect (in region II only), and the saltwater temperature effect, have been proposed. It has been assumed that CFCGR is proportional...
-
Relationship between heart rate variability, blood pressure and arterial wall properties during air and oxygen breathing in healthy subjects
PublicationPrevious studies reported that normobaric hyperoxia influences heart rate, arterial pressure, cardiac output and systemic vascular resistance, but the mechanisms underlying these changes are still not fully understood. Several factors are considered including degeneration of endothelium-derived nitric oxide by reactive oxygen species, the impact of oxygen-free radicals on tissues and alterations of autonomic nervous system function....
-
Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment
PublicationElectrochemical oxidation (EO), due to high efficiency and small carbon footprint, is regarded as an attractive option for on-site treatment of highly contaminated wastewater. This work shows the effectiveness of EO using three boron-doped diamond electrodes (BDDs) in sustainable management of landfill leachate (LL). The effect of the applied current density (25–100 mA cm−2) and boron doping concentration (B/C ratio: 500 ppm, 10,000...
-
Actual field corrosion rate of offshore structures in the Baltic Sea along depth profile from water surface to sea bed
PublicationThe paper presents the results of field electrochemical investigations on the corrosion rate of carbon steel in seawater of the Baltic Sea at the location of the Baltic Beta production rig. The measurements were conducted throughout the year in seawater at different depths from the sea surface to the sea bed (about 75 m). The results revealed corrosion aggressiveness of the seawater along the entire depth profile. There was...
-
Regional effects of amphetamine, cocaine, nomifensine and GBR 12909 on the dynamics of dopamine release and metabolism in the rat brain
Publication