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Permeability of sandy soils estimated from particle size distribution and field measurements
PublikacjaAccurate estimation of soil permeability is crucial in many geotechnical applications. Empirical and theoretical equations based on soil particle size distribution (PSD) offer a fast and cheap way for preliminary estimation of permeability in granular soils, however the results obtained from various formulas available in the literature often show significant discrepancies. While several comparative studies on this topic have been...
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Position and Orientation Estimation in Radio Network With Groups of Locally Synchronized Nodes
PublikacjaThis article presents a positioning system with groups of locally synchronized nodes. A mobile object is equipped with a group of several synchronized receivers that are able to measure the difference in the time of arrival of signals from reference transmitters. The reference transmitters are synchronized only in local groups, with no global synchronization between groups. It is assumed that the synchronous operation of transmitters...
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Public space as a place of rehabilitation for the elderly – a systematic literature review
PublikacjaThe phenomenon of the population’s gradual global ageing means that an increasing proportion of research is concerned with the space in which seniors function on a daily basis. They are primarily aimed at identifying elements of the built environment that need updating in the new social context. The purpose of the analyses presented in this article is to review the current scientific literature on various aspects of physical activity...
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Projektowanie profili maszyn wirnikowych przy zastosowaniu kryterium mini- mum dyssypacji.**2002, 122 s. 126 rys. 2 tab. bibliogr. 35 poz. maszyn. Rozprawa doktorska /2002.06.25/. PG, Wydz. Mechaniczny. Promotor: Prof. dr hab. inż. R. Puzyrewski.
Publikacja.
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Paintings
PublikacjaThe painting as a curtain (...) A contradiction is therefore what constitutes a painting, and ambiguity is its right. As a young artist, I intuitively defined the work of art as a boundary. Over the years that intuition changed into a conviction that the particular form of art which is painting at the same time reveals and hides; it exists at this intersection of functions as a see-through curtain. We don’t know why there are some...
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Problem of inconsistent and contradictory judgements in pairwise comparisonmethod in sense of AHP
PublikacjaThe aim of this paper is to show the relationship between inconsistent and contradictory matrices of data obtained as a result of the pairwise comparison of factors in the sense of the Analytic Hierarchy Process. The consistency check is performed to ensure that judgements are neither random nor illogical. This paper shows that even if a matrix will pass a consistency test successfully, it can be contradictory. Moreover an algorithm...
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Plastic Debris in the Stomach of the Invasive Signal Crayfish Pacifastacus leniusculus from a Baltic Coastal River
PublikacjaPollution by plastic debris, widely recognized as a growing global problem [1-3] is caused by the production of synthetic polymers. Over recent years, the production of plastics has increased, while in Europe, fossil-based plastics production has decreased, and recycled plastics production has increased [4]. There are different types of plastics. Some types of plastic ingredients, applied in a wide variety of cosmetics and personal...
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Polyether-block-amide PEBA membranes for gas separation and pervaporation; current design and applications
PublikacjaPolyether-block-amide (PEBA) membranes have attracted considerable attention for their exceptional efficacy in gas separation and pervaporation processes. This comprehensive review delves into the precise definition, distinguishing characteristics, and diverse applications of PEBA membranes over the past five years. A primary research objective focuses on enhancing gas separation efficiency, primarily through augmenting membrane...
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Probability distribution of flicker noise in AuNPdecorated graphene–Si Schottky barrier diode
PublikacjaWe present results of the probability distribution analysis of flicker noise generated in Au nanoparticle (AuNP) decorated graphene–Si Schottky barrier diodes with and without yellow light illumination (592 nm), close to the localized surface plasmon resonance in the AuNPs (586 nm). The AuNPs occupy imperfections in the single-layer graphene and reduce the flicker noise intensity generated in the graphene layer. The estimated probability...
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Problem jakości powietrza wewnętrznego na przykładzie placówek opieki nad dziećmi
PublikacjaZgodnie z informacjami udostępnionymi przez Światową Organizację Zdrowia, zanieczyszczone powietrze, jest przyczyną siedmiu milionów przedwczesnych zgonów na całym świecie. Wciąż jednak w społeczeństwie panuje przeświadczenie, że największe ryzyko dla zdrowia człowieka płynie z oddychania powietrzem atmosferycznym, pomijając istotność jakości powietrza wewnętrznego, które może być zanieczyszczone w podobnym stopniu lub nawet w...
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Poli(estro-eterouretany) zsyntezowane z nienasyconych oligo(alkilenoestro-etero)dioli i 4,4'-diizocyjanianu difenylometanu sieciowane styrenem, akrylanem butylu lub 2,4,6-triallyloksy-1,3,5-triazyną
PublikacjaPrzedstawiono wyniki badań dotyczące syntezy, budowy i właściwości nienasyconych oligo(alkilenoestro-etero)dioli (OAEE), jako półproduktów do otrzymywania nienasyconych prepolimerów estro-eterouretanowych oraz omówiono rezultaty eksperymentów dotyczących syntezy i właściwości usieciowanych poli(estro-eterouretanów) a także opisano otrzymywanie i właściwości kompozytów poli(estro-eterouretanowo)-szklanych.
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Potyczki algorytmiczne, czyli Alicja i Bogdan w nowych sytuacjach
PublikacjaW kolejnym odcinku serii z Alicją i Bogdanem najpierw ilustrujemy problem dominowania w grafach (kratowych): klasyczny i rzymski. Następnie ilustrujemy znany fakt, że zachłanność nie zawsze się opłaca. Pokażemy mianowicie, że algorytmy zachłanne nie gwarantują uzyskania rozwiązania optymalnego, nawet wówczas gdy problem da się rozwiązać w czasie wielomianowym.
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Przeterminowane i niewykorzystane leki w odpadach
PublikacjaZbiórka i niszczenie przeterminowanych i uszkodzonych leków ciągle jeszcze czeka na racjonalne rozwiązania. Stosowane obecnie w aglomeracji trójmiejskiej unieszkodliwianie termiczne całej zawartości pojemników ustawionych w aptekach niekoniecznie jest przyjazne środowisku.
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Proposed concept for the development of residential floating facilities
PublikacjaCurrently, a dynamic growth of interest in residential buildings located on the water can be observed in Poland. However, the lack of legal regulations, the increase in society's affluence and overpopulation in city centers lead to reflection on the development strategy that should be implemented for maritime construction. The publication presents a proposal of four development strategy concepts: aggressive,...
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Progress in module design for membrane distillation
PublikacjaThere have been tremendous advances in membrane distillation (MD) since the concept was introduced in 1961: new membrane designs and process configurations have emerged, and its commercial viability has been evaluated in several pilot-scale studies. However, its high energy consumption has hindered its commercialization. One of the most promising ways to overcome this obstacle is to develop more energy-efficient membrane modules....
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Prioritising national healthcare service issues from free text feedback – A computational text analysis & predictive modelling approach
PublikacjaPatient experience surveys have become a key source of evidence for supporting decision-making and continuous quality improvement within healthcare services. To harness free-text feedback collected as part of these surveys for additional insights, text analytics methods are increasingly employed when the data collected is not amenable to traditional qualitative analysis due to volume. However, while text analytics techniques offer...
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PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application
PublikacjaBioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles. The physicochemical properties of films were studied,...
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Performance of cryogenic oxygen production unit with exhaust gas bleed for sewage sludge gasification and different oxygen purities
PublikacjaThe paper presents a thermodynamic analysis of the integration of a cryogenic air separation unit into a negative CO2 emission gas power plant. The power cycle utilizes sewage sludge as fuel so this system fits into the innovative idea of bioenergy with carbon capture and storage. A cryogenic air separation unit integrated with the power plant was simulated in professional plant engineering and thermodynamic process analysis software....
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Praktyka wykonywania pomiarów instalacji fotowoltaicznych prowadząca do określenia rzeczywistego stanu technicznego
PublikacjaPraca przedstawia zasady wykonywania pomiarów instalacji fotowoltaicznych wg normy PN-EN 62446-1. Proponowany w normie zakres podstawowy pozwala tylko na ocenę bezpieczeństwa pracy instalacji. Dopiero zakres dodatkowy umożliwia uzyskanie informacji o referencyjnych mocach zainstalowanej elektrowni, jej sprawności, a nawet jednorodności poszczególnych ogniw fotowoltaicznych. Załączone przykłady pomiarów czystych i zabrudzonych paneli...
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Psychophysiological strategies for enhancing performance through imagery – skin conductance level analysis in guided vs. self-produced imagery
PublikacjaAthletes need to achieve their optimal level of arousal for peak performance. Visualization or mental rehearsal (i.e., Imagery) often helps to obtain an appropriate level of activation, which can be detected by monitoring Skin Conductance Level (SCL). However, different types of imagery could elicit different amount of physiological arousal. Therefore, this study aims: (1) to investigate differences in SCL associated with two instructional...