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Search results for: WAVEGUIDE COMPONENTS
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Nested Space Mapping Technology for Expedite EM-driven Design of Compact RF/microwave Components
PublicationA robust simulation-driven methodology for rapid and reliable design of RF/microwave circuits comprising compact microstrip resonant cells (CMRCs) is presented. We introduce a nested space mapping (NSM) technology, in which the inner space mapping layer is utilized to improve the generalization capabilities of the equivalent circuit model corresponding to a constitutive element of the circuit under consideration. The outer layer...
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Effect of long-term cold storage on physicochemical attributes and bioactive components of kiwi fruit cultivars
PublicationVarious kiwi fruit cultivars, bred in Korea, were kept in cold storage for 8–24 weeks for possible increase of their quality. Firmness significantly decreased at initial time in all cultivars.The rate of softeningwas the slowest in “Hayward”, followed by “Hort16A”, “Haenam”, “Daheung”, “Bidan”, “Hwamei”, and “SKK 12”. Sensory value increased with decreasing of firmness. Soluble solids content increased with storage time while acidity gradually...
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Mixed mechanical-metrological approach to quantify the fractographic damage in mechanical components subjected to cyclic loading
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Investigations of irradiation effects on electronic components to be used in VUV-FEL and X-FEL facilities at DESY
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The effect of cabbage juice and its active components on transcription factor Nrf2 in breast cell lines
PublicationObniżenie zagrożenia chorobami nowotworowymi w przypadku diety bogatej w kapustę wiąże się ze zdolnością bioaktywnych związków tego warzywa do indukowania enzymów ochronnych 2. fazy będacych pod kontrolą czynnika transkrypcyjnego Nrf2. Zbadano wpływ soków z kapusty na poziom Nrf2 w komórkach unieśmiertelnionych i nowotworowych linii odpowiednio MCF10A i MCF-7. W obu przypadkach obserwowano wzrost poziomu tego czynnika oraz jego...
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Methodology for developing Web-Based applications from reusable components using open source tools
PublicationGlobalna sieć stwarza nowe mozliwości dla projektantów IT. Pozwala na budowanie aplikacji z wielu części zwanych komponentami i rozproszonych w różnych miejscach sieci. metodologia wskazuje jak zbudować wszystkie elementy systemu: warstwę logiki biznesowej, dostępu do danych oraz prezentacji z gruboziarnistych komponentów. Takie mozliwości daje język Java i powiązane z nim technologie open-source: EJB do tworzenia komponentów biznesowych...
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Functional Components Enhancing Clients Attractiveness and Commercial Profitability of Internet Tourist-oriented Commercial Websites
PublicationTourism constitutes an important branch of economy in Mediterranean countries. Great number of people spend or are planning to spend their free time in the Mediterranean area. Extensive rentals of private apartments or houses for individual persons and their families as well as all kinds of services provided for tourists, in result, generate substantial economical incomes. Variety and diversity of offers of private accommodations...
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A research on the optimal conditions for separation and identyfication of the components from the Droseraceae extracts by column liquid chromatography
PublicationThe isolation of the components with anticipated biological properties i.e. antimicrobial, fungicidal, antioxidant and perhaps anticancer activity is for many years a one of the biggest issues of modern separation science. Their obtaining based on the isolation of the components with the biological activity from in vitro cultured plants by extraction techniques is often more difficult than their production by the chemical synthesis.The...
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Trends in edible vegetable oils analysis. Part A. Determination of different components of edible oils - a review
PublicationPrezentowana publikacja przeglądowa omawia aktualne podejście do oznaczania związków zawartych w olejach roślinnych. W ciągu ostatniej dekady zwraca się zdecydowanie większą uwagę na dietę uwzględniając oleje i tłuszcze jako źródła zdrowej energii. Jednym z głównych problemów związanych z tłuszczami są reakcje utleniania, których konsekwencją może być znaczne obniżenie wartości odżywczych olejów roślinnych. Publikacja przedstawia...
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Planning Around Polarisation: Components of Finding Common Ground Based on Regeneration Projects in London and Gdańsk
PublicationVarious forms of public participation in urban design and planning—as presented and discussed in literature—have recently been challenged by the needs and expectations of different stakeholders, including those coming from the private sector. This comes with a redefinition of the public good and the roles and responsibilities of municipal authorities in post‐liberal times. As a result, contemporary participatory processes need...
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Rapid multi-criterial design of microwave components with robustness analysis by means of knowledge-based surrogates
PublicationManufacturing tolerances and uncertainties concerning material parameters, e.g., operating conditions or substrate permittivity are detrimental to characteristics of microwave components. The knowledge of relations between acceptable parameter deviations (not leading to violation of design specifications) and the nominal performance (not considering uncertainties), and is therefore indispensable. This paper proposes a multi-objective...
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A microcontroller system for measurement of three independent components in impedance sensors using a single square pulse
PublicationOpracowano nową metodę pomiaru w dziedzinie czasu i wyznaczania trzech składowych elementów modelu czujnika impedancyjnego oraz zaimplementowano ją w inteligentnym czujniku impedancji sterowanym 8-bitowym mikrokontrolerem. Metoda bazuje na pobudzeniu dzielnika napięciowego składającego się z rezystora pełniącego funkcję konwertera prąd na napięcie i z czujnika impedancji pojedynczym impulsem prostokątnym o czasie trwania T bezpośrednio...
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Results from tests on bolted connection components for evaluation of friction coefficient in various contact conditions
PublicationThe main purpose of the work was the analysis and evaluation of the self-locking quality of a bolted joint covered with Xylan 1070 coating, with comparison to the classic bolts lubricated with Molykote compound during assembly. The second part of the work was the verification of the compliance of the bolts and nuts used in the installation with the ASME B1.1 norm.
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Selection of circuit geometry for miniaturized microwave components based on concurrent optimization of performance and layout area
PublicationThe paper presents a framework for automated EM-driven circuit geometry selection of miniaturized microwave components. Selection of a particular layout is based directly on miniaturization rates achieved for a set of candidate circuit geometries. Size reduction of the considered structures is obtained by replacing their main building blocks (i.e., conventional transmission lines) with slow-wave composite cells and meander lines....
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THE COST ANALYSIS OF CORROSION PROTECTION SOLUTIONS FOR STEEL COMPONENTS IN TERMS OF THE OBJECT LIFE CYCLE COST
PublicationSteel materials, due to their numerous advantages - high availability, easiness of processing and possibility of almost any shaping are commonly applied in construction for carrying out basic carrier systems and auxiliary structures. However, the major disadvantage of this material is its high corrosion susceptibility, which depends strictly on the local conditions of the facility and the applied type of corrosion protection system....
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Comprehensive evaluation of the carbon footprint components of wastewater treatment plants located in the Baltic Sea region
PublicationFinland and Poland share similar environmental interests with regard to their wastewater effluents eventually being discharged to the Baltic Sea. However, differences in the influent wastewater characteristics, treatment processes, operational conditions, and carbon intensities of energy mixes in both countries make these two countries interesting for carbon footprint (CF) comparison. This study aimed at proposing a functional...
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Quasi-Global Optimization of Antenna Structures Using Principal Components and Affine Subspace-Spanned Surrogates
PublicationParametric optimization is a mandatory step in the design of contemporary antenna structures. Conceptual development can only provide rough initial designs that have to be further tuned, often extensively. Given the topological complexity of modern antennas, the design closure necessarily involves full-wave electromagnetic (EM) simulations and—in many cases—global search procedures. Both factors make antenna optimization a computationally...
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Interactions between bioactive components determine antioxidant, cytotoxic and nutrigenomic activity of cocoa powder extract
PublicationNumerous studies have shown, rather disappointingly, that isolated bioactive phytochemicals are not as biologically effective as natural plant products. Such a discrepancy may be explained by the concept of food synergy, which was verified in this research for cocoa extract versus its major components with regard to cancer chemoprevention. The evaluation embraced the relationship between redox properties evaluated in cell-free systems...
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MULTI-CRITERIA COMPARATIVE ANALYSIS OF THE USE OF SUBTRACTIVE AND ADDITIVE TECHNOLOGIES IN THE MANUFACTURING OF OFFSHORE MACHINERY COMPONENTS
PublicationThe dynamic development of additive manufacturing technologies, especially over the last few years, has increased the range of possible industrial applications of 3D printed elements. This is a consequence of the distinct advantages of additive techniques, which include the possibility of improving the mechanical strength of products and shortening lead times. Offshore industry is one of these promising areas for the application...
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Interactions of amphotericin B derivative of low toxicity with biological membrane components - the Langmuir monolayer approach
PublicationMetodą monowarstw Langmuira zbadano naturę oddziaływań nowej pochodnej antybiotyku przeciwgrzybowego amfoterycyny B o niskiej toksyczności, tj. estru metylowego N-metylo-N-D-fruktopiranozyloamfoterycyny B (MF-AME)z komponentami błon biologicznych: ergosterolem, występującym w komórkach grzybowych i cholesterolem występującym w komórkach zwierzęcych oraz z modelowym fosfolipidem DPPC i na tej podstawie stwierdzono, że zróżnicowanie...
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A Comprehensive Survey on Antennas On-Chip Based on Metamaterial, Metasurface, and Substrate Integrated Waveguide Principles for Millimeter-Waves and Terahertz Integrated Circuits and Systems
PublicationAntennas on-chip are a particular type of radiating elements valued for their small footprint. They are most commonly integrated in circuit boards to electromagnetically interface free space, which is necessary for wireless communications. Antennas on-chip radiate and receive electromagnetic (EM) energy as any conventional antennas, but what distinguishes them is their miniaturized size. This means they can be integrated inside...
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Experimental and numerical investigation of crosstalk effect in coupled coplanar waveguides - part II: Multimode coupled line representation
PublicationW pracy przedstawiono metodę analizy nieidealności połączenia poszczegółnych fragmentów rozłożonego ekranu na zjawisko przesłuchu w strukturze sprzężonych falowodów koplanarnych z uziemionym centralnym paskiem. Analiza bierze pod uwagę efekty dyspersji oraz wielorodzajową naturę rozchodzenia się fali elektromagnetycznej w strukturze wieloprzewodowej. Teorię zweryfikowano praktycznie uzyskując bardzo dobrą zgodność pomiędzy wynikami...
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THE EVALUATION OF THE ABRASIVE WEAR OF THE TI13Nb13ZR ALLOY IMPLANTED BY NITROGEN IONS FOR FRICTION COMPONENTS OF THE HIP JOINT ENDOPROSTHESES
PublicationZ uwagi na potrzeby społeczne, a zwłaszcza rosnące zapotrzebowanie na endoprotezy stawów biodrowego i kolanowego oraz uwzględniając fakt, że procesy tribologiczne odgrywają wiodącą rolę w procesie utraty stabilności endoprotez ortopedycznych i decydują o ich trwałości, uznano za celowe przeprowadzenie oceny wpływu implantacji jonowej na zużycie ścierne biostopu Ti13Nb13Zr. Do badań wykorzystano pary trące: nieimplantowany stop...
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In Vitro Anticancer Potential of Jasione montana and Its Main Components against Human Amelanotic Melanoma Cells
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Application possibilities of the low-temperature repairs on creep-resistance turbine components from material GX23CrMoV12-1
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The Influence of Purge Times on the Yields of Essential Oil Components Extracted from Plants by Pressurized Liquid Extraction
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The Landscape of the Spa Parks Creation through Components Influencing Environmental Perception Using Multi-Criteria Analysis
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Numerical model of human head phantom to ensure dosimetry of dose components for boron neutron capture therapy
PublicationExtremely important aspects of the boron neutron capture therapy are, first of all, administering to the patient a boron compound that selectively reaches the neoplastic cells, and in the second step, the verification of the irradiation process. This paper focuses on the latter aspect, which is the detailed dosimetry of the processes occurring after the reaction of thermal neutrons with the boron-10 isotope. The results of computer...
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Improving Thermal Insulation Properties for Prefabricated Wall Components Made of Lightweight Aggregate Concrete with Open Structure
PublicationPorous concrete is commonly used in civil engineering due to its good thermal insulation properties in comparison with normal concrete and high compression strength in comparison with other building materials. An extremely porous concrete, called ‘lightweight aggregate concrete with open structure’ (LAC), is used in some German plants to produce prefabricated wall components. They are used mainly in hall buildings, e.g. supermarkets....
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Nutrients and Bioactive Components of Human Milk After one Year of Lactation. Implication for Human Milk Banks
PublicationObjective: Specifying the nutrient content and bioactive compounds in milk from long-term lactation for the purpose of finding additional sources of donors’ milk for HMBs. Method: Human milk samples were collected from 43 mothers of term infants (term infant human milk, TIHM) (3–6 weeks of lactation) and 50 mothers who have breastfed for over a year (long-nursing human milk, LNHM). The milk collection time was 24 hours. The analyses...
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Low-Cost Modeling of Microwave Components by Means of Two-Stage Inverse/Forward Surrogates and Domain Confinement
PublicationFull-wave electromagnetic (EM) analysis is one of the most important tools in the design of modern microwave components and systems. EM simulation permits reliable evaluation of circuits at the presence of cross-coupling effects or substrate anisotropy, as well as for accounting for interactions with the immediate environment. However, repetitive analyses required by EM-driven procedures, such as parametric optimization or statistical...
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Low-cost performance-driven modelling of compact microwave components with two-layer surrogates and gradient kriging
PublicationUtilization of electromagnetic (EM) simulation tools has become indispensable for reliable evaluation of microwave components. As the cost of an individual analysis may already be considerable, the computational overhead associated with EM-driven tasks that require massive simulations (e.g., optimization) may turn prohibitive. One of mitigation methods is the employment of equivalent network models. Yet, they are incapable of accounting...
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Variable-fidelity response feature surrogates for accelerated statistical analysis and yield estimation of compact microwave components
PublicationAccounting for manufacturing tolerances is an essential part of a reliable microwave design process. Yet, quantification of geometry and/or material parameter uncertainties is challenging at the level of full-wave electromagnetic (EM) simulation models. This is due to inherently high cost of EM analysis and massive simulations necessary to conduct the statistical analysis. Here, a low-cost and accurate yield estimation procedure...
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Experimental and theoretical solubility advantage screening of bi-component solid curcumin formulations
PublicationA comprehensive experimental and theoretical screening was performed for identification of curcumin solubilizers. Experimental data led to formulation of a non-linear QSPR model correlating molecular descriptors with measured solubilities. The majority of synthesized binary systems exhibited a moderate enhancement of curcumin solubility, which was found to be the highest in the case of curcumin cocrystallized with pyrogallol. New...
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Chemometric exploration of sea water chemical component data sets with missing elements
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Determination of Odour Interactions of Three-Component Gas Mixtures Using an Electronic Nose
PublicationThe paper presents an application of an electronic nose prototype comprised of six TGS-type sensors and one PID-type sensor to identify odour interaction phenomena in odorous three-component mixtures. The investigation encompassed eight odorous mixtures—toluene-acetone-triethylamine and formaldehyde-butyric acid-pinene — characterized by different odour intensity and hedonic tone. A principal component regression (PCR) calibration...
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Experimental and numerical investigation of crosstalk effect in coupled coplanar waveguides - part i: bi-mode coupled line representation
PublicationW pracy przedstawiono analizę zjawiska przesłuchu w strukturze sprzężonych falowodów koplanarnych. Analiza wykorzystując metodę przestrzeni widmowej i bazując na dwurodzajowym modelu pary linii sprzężonych uwzględnia efekty dyspersji obserwowane w zakresie wysokich częstotliwośći. Przedyskutowano zagadnienie sposobu definicji impedancji charakterystycznych dla prowadzonych rodzajów pola. Wyniki modelowania numerycznego potwierdzono...
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The Use of DArTseq Technology to Identify New SNP and SilicoDArT Markers Related to the Yield-Related Traits Components in Maize
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In vivo evaluation of the antipsoriatic effect of hydrogel with lavandin essential oil and its main components after topical application
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Enhanced extraction of proteins using cholinium-based ionic liquids as phase-forming components of aqueous biphasic systems
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Expression profiles of vault components MVP, TEP1 and vPARP and their correlation to other multidrug resistance proteins in ovarian cancer
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The loss of essential oil components induced by the Purge Time in the Pressurized Liquid Extraction (PLE) procedure of Cupressus sempervirens
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Taste-active peptides and amino acids of pork meat as components of dry-cured meat products: An in-silico study
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Feature Importance of Stabilised Rammed Earth Components Affecting the Compressive Strength Calculated with Explainable Artificial Intelligence Tools
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CYP19 mRNA and protein levels in nontumorogenic breast epithelial cells (MCF10A) treated with active components of cabbage juices
PublicationZbadano wpływ soków z kapusty na poziom ekspresji genu CYP19 w nietumorogennych komórkach nabłonka gruczołu mlekowego MCF10A kodującego enzym aromatazę uczestniczący w biosyntezie estrogenów i w związku z tym wpływający na zagrożenie rakiem piersi. Soki z kapusty oraz bioaktywne związki w nich występujące stosowane w niskich dawkach obniżały poziom ekspresji tego genu, a zatem miały działanie chemoprewencyjne. Wyższe dawki zarowno...
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Twenty‐four‐hour and conventional blood pressure components and risk of preterm delivery or neonatal complications in gestational hypertension
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Effect of bio-based components on the chemical structure, thermal stability and mechanical properties of green thermoplastic polyurethane elastomers
PublicationIt seems to be obvious that conditions changes during polyols synthesis have impact on the polyols properties. Even the chemical formula is the same or similar, physicochemical properties and also molecular weight of polyols might be different and are significant in term of future polyurethanes properties and processing. In this work, fully bio-based poly(propylene succinate)s synthesized at different temperature conditions were...
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Expedited Globalized Antenna Optimization by Principal Components and Variable-Fidelity EM Simulations: Application to Microstrip Antenna Design
PublicationParameter optimization, also referred to as design closure, is imperative in the development of modern antennas. Theoretical considerations along with rough dimension adjustment through supervised parameter sweeping can only yield initial designs that need to be further tuned to boost the antenna performance. The major challenges include handling of multi-dimensional parameter spaces while accounting for several objectives and...
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Low-cost data-driven modelling of microwave components using domain confinement and PCA-based dimensionality reduction
PublicationFast data-driven surrogate models can be employed as replacements of computationally demanding full-wave electromagnetic simulations to facilitate the microwave design procedures. Unfortunately, practical application of surrogate modelling is often hindered by the curse of dimensionality and/or considerable nonlinearity of the component characteristics. This paper proposes a simple yet reliable approach to cost-efficient modelling...
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Cost-Efficient Globalized Parameter Optimization of Microwave Components through Response-Feature Surrogates and Nature-Inspired Metaheuristics
PublicationDesign of contemporary microwave devices predominantly utilizes computational models, including both circuit simulators, and full-wave electromagnetic (EM) evaluation. The latter constitutes the sole generic way of rendering accurate assessment of the system outputs that considers phenomena such as cross-coupling or radiation and dielectric losses. Consequently, for reliability reasons, the final tuning of microwave device parameters...