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Wyniki wyszukiwania dla: INVERSE AGONIST
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Dead time effects compensation strategy by third harmonic injection for a five-phase inverter
PublikacjaThis paper proposes a method for compensation of dead-time effects for a fivephase inverter. In the proposed method an additional control subsystem was added to the field-oriented control (FOC) scheme in the coordinate system mapped to the third harmonic. The additional control loop operates in the fixed, orthogonal reference frame ( α - β coordinates) without the need for additional Park transformations. The purpose of this method...
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Reducing common mode voltage and bearing currents in quasi - resonant DC - link inverter
PublikacjaIn the paper, a concept of separation of an inverter-fed induction motor drive from its mains supply by two transistor switches inserted in the dc-link circuit is reexamined based on the proposed parallel quasi-resonant dc-link inverter (PQRDCLI). The objective of the paper is to show an advantage of the proposed topology in limiting high frequency common mode voltage and bearing currents. In the laboratory setup, an induction...
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Trimethylamine N-oxide and the reverse cholesterol transport in cardiovascular disease: a cross-sectional study
PublikacjaThe early atherosclerotic lesions develop by the accumulation of arterial foam cells derived mainly from cholesterol-loaded macrophages. Therefore, cholesterol and cholesteryl ester transfer protein (CETP) have been considered as causative in atherosclerosis. Moreover, recent studies indicate the role of trimethylamine N-oxide (TMAO) in development of cardiovascular disease (CVD). The current study aimed to investigate the association...
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Unidirectional DC/DC Converter with Voltage Inverter for Fast Charging of Electric Vehicle Batteries
PublikacjaThe paper proposes the adaptation of the industrial plant’s power network to supply electric vehicle (EV) fast-charging converters (above 300 kW) using renewable energy sources (RESs). A 600 V DC microgrid was used to supply energy from RESs for the needs of variable speed motor drives and charging of EV batteries. It has been shown that it is possible to support the supply of drive voltage frequency converters (VFCs) and charging...
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MPPT and GMPPT Implementation for Buck-Boost Mode Control of quasi-Z-Source Inverter
PublikacjaThe focus is on the maximum power point tracking implementation for the buck-boost voltage mode control of a single-phase multilevel inverter based on a three-level neutral point clamped quasi-Z-source topology. To utilize shoot-through states only when boost function is needed and avoid it in the buck mode, two different control approaches are required. This work proposes merged control system which provides switching between...
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Optimizing FSO networks resilient to adverse weather conditions by means of enhanced uncertainty sets
PublikacjaThis work deals with dimensioning of wireless mesh networks (WMN) composed of FSO (free space optics) links. Although FSO links realize broadband transmission at low cost, their drawback is sensitivity to adverse weather conditions causing transmission degradation on multiple links. Hence, designing such FSO networks requires an optimization model to find the cheapest configuration of link capacities that will be able to carry...
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Errors in the analysis of series resonant inverter/converter assuming sinusoidal waveforms of voltage and current
PublikacjaIn this paper the theory and simulation results of the series resonant inverter / converter are presented. In this work the authors carried out a detailed comparative analysis of results obtained using the method of AC analysis in the steady state for the first harmonic with the results of computer simulation. The AC analysis under certain conditions can lead to errors disqualifying this method. In particular, these errors appear...
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Hybridized Space-Vector Pulsewidth Modulation for Multiphase Two-Level Voltage Source Inverter
PublikacjaIn space vector pulsewidth modulation (SVPWM) algorithms for multiphase two-level voltage source inverters (VSI), the components of active vectors in all orthogonal spaces have to be calculated within the processor and stored in its memory. These necessitate intensive computational efforts of the processor and large memory space. This article presents a hybridized SVPWM for multiphase two-level VSI. In this algorithm, elements...
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Application of persulfate-based oxidation processes to address diverse sustainability challenges: A critical review
PublikacjaOver the past years, persulfate (PS) is widely applied due to their high versatility and efficacy in decontamination and sterilization. While treatment of organic chemicals, remediation of soil and groundwater, sludge treatment, disinfection on pathogen microorganisms have been covered by most published reviews, there are no comprehensive and specific reviews on its application to address diverse sustainability challenges, including...
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Testing Watermark Robustness against Application of Audio Restoration Algorithms
PublikacjaThe purpose of this study was to test to what extent watermarks embedded in distorted audio signals are immune to audio restoration algorithm performing. Several restoration routines such as noise reduction, spectrum expansion, clipping or clicks reduction were applied in the online website system. The online service was extended with some copyright protection mechanisms proposed by the authors. They contain low-level music features...
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Chromatographic Examinations of Tea's Protection Against Lipid Oxidative Modifications
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Oligopeptide antifungals are exceptionally active against multidrug-resistant yeast
PublikacjaPermeazy peptydowe w komórkach drożdżowych są zdolne do transportu do wnętrza komórek oligopeptydów, zawierających w swojej strukturze niebiałkowe aminokwasy o właściwościach przeciwgrzybowych. Wśród szerokiego wachlarza tego rodzaju związków przebadanych pod względem aktywności biologicznej na wielolekoopornych komórkach drożdżowych, zaobserwowano liczna grupę, wykazującą zwiększoną aktywność względem komórek eksprymujących transportery...
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Photodynamic Activity of Tribenzoporphyrazines with Bulky Periphery against Wound Bacteria
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Delving into the Therapeutic Potential of Carica papaya Leaf against Thrombocytopenia
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Decreasing Vaccination Coverage Against Hepatitis B and Tuberculosis in Newborns
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Can photocatalysis help in the fight against COVID-19 pandemic?
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Concrete corrosion against penetration of mineral oil application of impregnants
PublikacjaOleje stanowią związki organiczne, w skład których wchodzą kwasy tłuszczowe nasycone i nienasycone oraz gliceryny różnego rodzaju. W zależności od rodzaju i właściwości olejów agresywność ich w stosunku do betonu jest różna. Olej izoluje dostęp wody do składników betonu, dlatego nie następuje dalsza hydratacja i przyrost wytrzymałości. Przesycenie betonu olejami powoduje wskutek obniżenia tarcia wewnętrznego tworzywa obniżenie...
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Strengthening of thin-walled columns against flexuralbuckling at elevated temperatur.
PublikacjaZa pomocą analizy wrażliwości wyznaczono mmiejsca wzmocnienia słupa stalowego obciążonego działaniem wysokiej temperatury. Wyznaczono przybliżoną wartość siły krytycznej słupa przy zmiennej temperaturze. Zastosowano model stali zgodny z polską normą PN-90/B-03200.
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Potential of ASH technology for protection against chemical and biological attacks
PublikacjaTechnologia wykorzystująca reaktor cyklonowy dzięki dużej wydajności posiada szczególne predyspozycje do usuwania lub niszczenia składników broni chemicznej i biologicznej ze strumieni gazów o dużym natężeniu przepływu, pochodzących z systemów ogrzewania, wentylacji i klimatyzacji, bez powodowania znacznych spadków ciśnienia. Reaktor cyklonowy posiada znaczne mniejsze rozmiary, około 10% objętości tradycyjnych systemów oczyszczania...
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Just Let Me Think: Designing Against Acquired Illiteracy.
PublikacjaThis article concerns the relatively new problem of illiteracy relating to persons previously being literate, which is caused by too intensive using of so-called digital media (TV, computers, tablets, smartphones, e-book readers, portable media players, etc.). The problem has been observed for several years mainly in countries with high economic and technological development. The widespread use of digital media and the ease of...
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A survey on network resiliency methodologies against weather-based disruptions
PublikacjaDue to the increasing dependence on network services of our society, research has recently been concentrating on enhancing traditional protection strategies to withstand large-scale failures, as in case of disaster events. The recently-formed EU-funded RECODIS project aims at coordinating and fostering research collaboration in Europe on disaster resiliency in communication networks. In particular, the Working Group (WG) 2 of the...
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Planning the City Against Barriers. Enhancing the Role of Public Spaces
PublikacjaContemporary cities are being fragmented by growing number of technical barriers like roads, railways, infrastructural objects, that generate variety of problems of different nature. The aim of the research is to present the issues connected with such barriers in the city and the ways of solving them. Main problems are e.g.: the destruction of the complexity of urban fabric, functional disadvantages, environmental and landscape...
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Protection of surface water against contamination by wetland systems in Poland
PublikacjaOpisano systemy hydrofitowe stosowane do usuwania zanieczyszczeń z wód powierzchniowych zasilanych wodami opadowymi. Po wprowadzeniu systemów stwierdzono znaczną poprawę jakości wód analizowanych cieków.
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CORPORATE BANKRUPTCY PREDICTION IN POLAND AGAINST THE BACKGROUND OF FOREIGN EXPERIENCE
PublikacjaIn highly developed countries, research in the field of bankruptcy risk prediction has been conducted for many years. For example, in the United States, which can be considered a pioneering country, the first publications appeared in the early twentieth century. In Poland, due to political and economic reasons, the interest in this issue dates back to the early 1990s. For this reason, this publication attempts to answer the following...
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CORPORATE BANKRUPTCY PREDICTION IN POLAND AGAINST THE BACKGROUND OF FOREIGN EXPERIENCE
PublikacjaIn highly developed countries, research in the field of bankruptcy risk prediction has been conducted for many years. For example, in the United States, which can be considered a pioneering country, the first publications appeared in the early twentieth century. In Poland, due to political and economic reasons, the interest in this issue dates back to the early 1990s. For this reason, this publication attempts to answer the following...
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Conformational studies of highly potent 1-aminocyclohexane-1-carboxylic acid substituted V2 vasopressin agonists
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REVERSE MODELLING OF MICROSEISMIC WAVES PROPAGATION FOR THE INTERPRETATION OF THE DATA FROM HYDRAULIC FRACTURING MONITORING IN POLAND
PublikacjaA hydraulic fracturing job was performed to stimulate gas flow from a horizontal wellbore located in Poland. The whole operation was overseen by means of microseismic monitoring. For this purpose, an array of 12000 geophones was deployed on ground in form of patches distributed unevenly in a region of 4km from the wellbore. The array was constantly recording seismic signals during whole fracturing processed. Such recorded signals...
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Design of three-phase three-level CIC T-source inverter with maximum boost control
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Molecular basis and potential activity of HIV-1 reverse transcriptase toward trimethylamine-based compounds
PublikacjaReverse transcriptase (RT) inhibitors are currently used to treat human immunodeficiency virus (HIV)-1 infections. In this work, novel triethylamine derivatives were designed and studied by rigid and flexible docking and molecular dynamics (MD) approaches. An apo form of HIV-1 RT was also studied by MD simulation to analyze comparative response of protein in ligand-bound and ligand-unbound forms. Among newly designed HIV-1 RT inhibitors,...
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Small-lot Production with Additive Production Using Reverse Logistics and IT Solutions in COVID-19 Era
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Experimental Examination of Facilities Layout Problems in Logistics Systems Including Objects with Diverse Sizes and Shapes
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Telomere Length and Risk of Major Adverse Cardiac Events and Cancer in Obstructive Sleep Apnea Patients
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RNS reverse high-speed converter with quasi-regular structure based on the Chinese Remainder Theorem
PublikacjaPrzedstawiono dwie nowe architektury szybkiego konwertera z systemuresztowego do systemu binarnego oparte o chińskie tw. o resztach. Zastosowano nowe struktury 4-operandowych sumatorów modulo 2M. Pierwsza ze struktur oparta jest o wstępne sumowanie najstarszych bitów wektorów sumy i przeniesienia na wyjściu sumatora CSA, natomiast druga o bezpośrednie wykrywanie przekroczenia 2M. Konwerter wykorzystujący drugą ze struktur charakteryzuje...
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New data acquisition system for birch sap concentrate production using the reverse osmosis technology
PublikacjaThe work presents a simple electronic device that helps to monitor the basic parameters of the reverse osmosis (RO) system during the concentration of birch tree sap. The construction costs are low (around 150 Euro) but the functionality of the device is high. It has an in-build two channel conductometer and can measure the volumetric flow rate of two streams of liquids. The collected data are transmitted wirelessly via Bluetooth...
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Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter
PublikacjaThe paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be divided into two virtual machines that are controlled separately and independently. The control system structure is presented in conjunction with speed and rotor flux observers that...
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The energy consumption during the birch tree sap concentration process using the reverse osmosis system
PublikacjaBirch tree sap was concentrated by mens of the reversed osmosis technique. The energy consumption in a small-scale pilot apparatus was estimated. The threshold value for the water removal above which the specific energy consumption significantly increased was identified. Below the threshold value the reversed osmosis had low energy demand and could be an attractive method for the production of birch tree sap-based beverages.
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Inline Waveguide Filter With Transmission Zeros Using a Modified-T-Shaped-Post Coupling Inverter
PublikacjaThis letter reports the design techniques for a class 2 of inline waveguide bandpass filters with sharp-rejection capabil3 ities at the lower stopband based on a novel nonlinear-frequency4 variant-coupling (NFVC) structure. The proposed NFVC consists 5 of a modified-T-shaped metallic post (MTP) that is placed at the 6 center of the waveguide broad wall with its open arms lying 7 along the waveguide width. The engineered NFVC structure 8...
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Single-phase, Five-level Inverter with SPWM-Based Neutral Point Voltage Balancing Scheme
PublikacjaMultilevel inverter topologies provide several advantages over two-level inverter configuration. These benefits are the reason for the growing interest in multilevel topologies among research society. One of the most popular topological concepts (diode and active switch clamping) requires neutral-point potential balancing due to series-connected capacitor banks across the input dc link in such derived inverter configurations. This...
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Sweet grass protection against oxidative stress formation in the rat brain
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System of protection against electric shock for circuits with power electronics converters
PublikacjaModern low voltage circuits are very often equipped with power electronics converters, therefore in these circuits non-sinusoidal earth currents (touch currents) may occur. For non-sinusoidal currents safety criteria should be modified. This paper presents these modified criteria and a computer system of protection against electric shock which can be implemented in circuits with power electronics converters. The system is based...
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Application of Game Theory against Nature in Supporting Bid Pricing in Construction
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Modus operandi of Qatar Resistance Policy against “Anti-Terror Quartet”
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Multi-Criteria Early Warning System Against Enteprise Bankruptcy Risk
PublikacjaW artykule tym autor porównuje skuteczność opracowanego przez niego wielokryterialnego systemu wczesnego ostrzegania firm z tradycyjnym modelem analizy dyskryminacyjnej prognozowania upadłości. System wczesnego ostrzegania oparty został na metodzie logiki rozmytej. Badania te są jedną z pierwszych prób na świecie wykorzystania logiki rozmytej w prognozowaniu zagrożenia bankructwem firm. Uzyskane wyniki świadczą o dużym potencjale...
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Protective effect of desloratadine against oxidative stress in human erythrocytes in vitro
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Computational Selectivity Assessment of Protease Inhibitors against SARS-CoV-2
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Toxoplasma gondii: Chimeric Dr fimbriae as a recombinant vaccine against toxoplasmosis
PublikacjaW publikacji przedstawiono protekcyjne i immunogenne właściowści chimerycznych fimbrii typu Dr zawierających sekwencje epitopowe antygenów SAG1, MAG1 oraz GRA1 Toxoplasma gondii. Uzyskane wyniki porównano z właściwościami immunogennymi antygenowych białek rekombinantowych oraz poliwalentnego antygenu natywnego. Antygeny rekombinantowe indukują silną odpowiedź immunologiczną i w 89% zapobiegają formowaniu się cyst w mózgu myszy....
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Dabigatran: its protective effect against endothelial cell damage by oxysterol
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The Bactericidal Activity of Temporin Analogues Against Methicillin Resistant Staphylococcus aureus
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Law regulations against physical calculations - problems in water and sewage management
PublikacjaW pracy zostały opisane przykłady trzech typów problemów w zakresie gospodarki wodno-ściekowej, z jakimi można spotkać się w związku z wejściem w życie przepisów uwzględniających obowiązujące w tej dziedzinie dyrektywy Unii Europejskiej. Są to m.in. problemy ze zbyt szeroką możliwością interpretacji pewnych zapisów, problemy związane z nieuwzględnianiem w przepisach praw fizyki, a także brak ustawowej regulacji pewnych zagadnień.
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The Process of Building Civil Society against the Shortcomings of Polish Planning Legislation
PublikacjaThe article presents the main assumptions of the project of Coastal Strip development in Gdansk. According to the authors best knowledge this is the first pro publico bono project in Poland in a large area of the city formed on the initiative of and elaborated by the city's inhabitants supported by two NGOs. Successive stages of the project preparation are discussed on the background of the shortcomings of Polish planning law...