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Metody poprawy skuteczności oczyszczania powietrza zanieczyszczonego hydrofobowymi lotnymi związkami organicznymi w biofiltrach ze złożem zraszanym
- Piotr Rybarczyk
- Bartosz Szulczyński
- Dominik Dobrzyniewski
- Jacek Gębicki
2022
Zanieczyszczenie powietrza atmosferycznego lotnymi związkami organicznymi o charakterze odorowym stanowi uciążliwy problem środowiskowy oraz społeczny. Do oczyszczania dużych objętości tego typu gazów stosuje się m.in. biofiltrację. W niniejszej pracy przedyskutowano główne trudności związane z oczyszczaniem powietrza zanieczyszczonego hydrofobowymi lotnymi związkami organicznymi oraz podano aktualne trendy poprawy skuteczności oczyszczania ww. strumieni w procesach biofiltracji.
Metody wgłębnej mody$ kacji gruntu słabonośnego do posadowienia nowych i zapasowych lotniczych dróg startowych.
- Eligiusz Mieloszyk
- Anita Milewska
- Mariusz Wyroślak
2022 Pełny tekst Przegląd Komunikacyjny
Po analizie oddziaływań statków powietrznych na nawierzchnię lotniska (miejsca postojowe, pasy startowe, drogi startowe) uznano za celowe rozważenie problemu wgłębnego ulepszania lub wzmacniania podłoża gruntowego. Dotyczy to szczególnie gruntu sła- bonośnego. Przedstawiono szybką i skuteczną metodę wzmacniania podłoża gruntowego przeznaczonego do budowy obiektów inżynier- skich wykorzystywanych do wykonywania cywilnych lub wojskowych operacji lotniczych. Pozwala ona wykorzystywać do wspomnianych celów nieużytki, tereny podmokłe, bagna itp. tworząc w ten sposób rozproszoną sieć lądowisk zwiększającą bezpieczeństwo kraju oraz zdynamizować dostępność do transportu lotniczego dużych grup społecznych.
Metodyka testowania paliw żeglugowych w rzeczywistych warunkach pracy silnika o zapłonie samoczynnym.
- Zbigniew Korczewski
2022
W monografii zestawiono opracowane metody diagnozowania silnika o zapłonie samoczynnym dużej mocy, które umożliwiają dokonanie kompleksowej oceny jakości użytkowej zastosowanego paliwa zasilającego pod względem energetycznym, emisyjnym i strukturalnym (niezawodnościowym). Przybliżono wybrane aspekty organizacyjne i metrologiczne testowania standardowych i modyfikowanych paliw żeglugowych w warunkach laboratoryjnych. Tego typu badania realizowane na modelu fizycznym w małej skali bezpośrednio poprzedzają wdrożenie testowanego paliwa do zasilania pełnowymiarowych silników okrętowych w eksploatacji. W początkowej części opracowania przedstawiono obszerną charakterystykę zaprojektowanej i zbudowanej instalacji zasilania paliwem silnika badawczego, która odwzorowuje adekwatne cechy konstrukcyjne i procesowe (parametryczne) rzeczywistej instalacji okrętowej. Uwzględniono w niej – między innymi – konieczność oczyszczania i podgrzewania paliwa przed jego wprowadzeniem do komory spalania silnika. Zaprezentowano również schemat organizacji badań przy zastosowaniu odpowiednio skonfigurowanej aparatury pomiarowej (diagnostycznej). Kluczowe znaczenie ma rozdział 4 poświęcony metodzie tworzenia rankingu jakości użytkowej paliw żeglugowych, którą opracowano zgodnie z teorią badań operacyjnych. Przyjęta procedura testowania paliwa przewiduje sformułowanie wielokryterialnej oceny jego przydatności eksploatacyjnej na podstawie badań eksperymentalnych procesów energetycznych silnika o zapłonie samoczynnym w ściśle określonych stanach obciążenia – ustalonych i nieustalonych. Badaniu poddaje się również emisyjność chemiczną spalin wylotowych, a także zmiany stanu technicznego przestrzeni roboczej oraz aparatury 164 Streszczenie w języku polskim wtryskowej silnika spowodowane destrukcyjnym oddziaływaniem testowanego paliwa zasilającego. Rozdział 6, będąc integralną częścią monografii, stanowi jednocześnie jej największy walor utylitarny, gdyż w odróżnieniu od wcześniejszych treści, stricte laboratoryjnych, zawiera szczegółowe wskazówki metodyczne odnośnie do realizacji badań energetycznych i emisyjnych silnika okrętowego w eksploatacji, zasilanego jednym z paliw żeglugowych testowanych wcześniej na silniku badawczym w laboratorium. Wyniki systematycznie prowadzonych badań eksploatacyjnych silnika objętego nadzorem diagnostycznym potwierdziły wysoką jakość użytkową zastosowanego paliwa, dobrze prognozując trwałość i niezawodność zasilanych nim silników okrętowych.
MgPdSb─An Electron-Deficient Half-Heusler Phase
- Michał Winiarski
- Kamila Stolecka
- Leszek Litzbarski
- Thao Tran
- Karolina Górnicka
- Tomasz Klimczuk
2022 Pełny tekst Journal of Physical Chemistry C
The half-Heusler family consists of many semiconducting intermetallic compounds, virtually all of them having a valence electron count (VEC) of 18. We have studied an electron-deficient (VEC = 17) phase MgPdSb and its Pd-stuffed variant MgPd1.25Sb. The cubic F4̅3m crystal structure was confirmed by the Rietveld refinement of powder X-ray diffraction (XRD) data. The lattice parameter is a = 6.284 and 6.335 Å for MgPdSb and MgPd1.25Sb, respectively. The Debye temperature and Sommerfeld coefficient for MgPdSb are ΘD = 282 K and γ = 3.3 mJ mol–1 K–2, respectively, and are similar to those obtained for MgPd1.25Sb. There is neither phase transition nor superconductivity observed above 1.8 K. The differences between the electronic structures of Mg-based half-Heusler compounds make them robustly metallic, irrespective of the electron count and the introduction of interstitial transition metal (Pd) atoms.
Microbial and chemical quality assessment of the small rivers entering the South Baltic. Part II: Case study on the watercourses in the Puck Bay catchment area
- Emilia Bączkowska
- Agnieszka Kalinowska
- Oskar Ronda
- Katarzyna Jankowska
- Rafał Bray
- Bartosz Płóciennik
- Żaneta Polkowska
2022 Pełny tekst Archives of Environmental Protection
Due to its location, Puck Bay is an area particularly vulnerable to pollution of anthropogenic origin. The aim of the study was to assess the water quality of small watercourses entering the inner part of Puck Bay. The paper presents the results of chemical and microbiological analyses of 10 rivers and canals at their estuaries located on the western shore of the internal Puck Bay. The following environmental parameters were analyzed: conductivity, pH, dissolved oxygen concentration (in situ measurements), COD (cuvette tests), concentrations of ions (ion chromatography). Microbiological analysis included assessment of sanitary condition based on the number of fecal coliforms by a cultivation method. The determination of basic microbiological parameters such as: prokaryotic cell abundance expressed as total cells number (TCN), prokaryotic cell biovolume expressed as average cell volume (ACV), the prokaryotic biomass (PB) and prokaryotic cell morphotype diversity were determined using epifluorescence microscopy method. Based on the obtained results, it was found that small watercourses may carry a notable load of anthropogenic pollution and thus affect the environment of Puck Bay. The results clearly indicate the need for quality monitoring in the rivers and canals in the Coastal Landscape Park, flowing into Puck Bay. The research showed that also smaller watercourses may have an impact on the coastal waters’ state, and thus on the Baltic Sea water quality.
Microbial fuel cell applications for removal of petroleum hydrocarbon pollutants: A review
- Pegah Fatehbasharzad
- Samira Aliasghari
- Ipak Shaterzadeh Tabrizi
- Javed Khan
- Grzegorz Boczkaj
2022 Pełny tekst Water Resources and Industry
Bioelectrochemical systems (BESs) are considered as the potential approaches to remediate the environments contaminated by hydrocarbons. This review addresses the application of BESs particularly microbial fuel cells (MFCs) in degradation of petroleum hydrocarbons, including BTEXs, from soil, water, wastewater and sediments. Details on reactor design and critical issues are discussed. Aspects on electrodes, redox mediators and membranes are evaluated, including economic feasibility. The microbial community is considered in detail. It can be concluded, that comparing to classic configurations, single-chamber air-cathode reactors are more cost-effective. Secondly, systems based on small-scale units are recommended for future developments.
Microcrystalline diamond film evaluation by spectroscopic optical coherence tomography
- Paulina Strąkowska
- Marcin Strąkowski
2022 Pełny tekst Photonics Letters of Poland
This study has focused on the microcrystalline diamond film (MCD) thickness evaluation. For this purpose, optical coherence tomography (OCT) enhanced by spectroscopic analysis has been used as a method of choice. The average thickness of the tested layer was about 1.5 µm, which is below the standard 2-point OCT resolution. In this case, the usefulness of the spectroscopic analysis was confirmed for the evaluation of the thickness changes in the submicrometer range.
Microfluidic devices for photo-and spectroelectrochemical applications
- Robert Bogdanowicz
- Martin Jönsson-Niedziolka
- Elizaveta Vereshchagina
- Anna Dettlaff
- Suchanat Boonkaew
- Mattia Pierpaoli
- Paul Wittendorp
- Shruti Jain
- Frode Tyholdt
- Jacob Thomas
- Pawel Wojcik
2022 Pełny tekst Current Opinion in Electrochemistry
The review presents recent developments in electrochemical devices for photo- and spectroelectrochemical investigations, with the emphasis on miniaturization (i.e., nanointerdigitated complementary metal-oxide-semiconductor devices, micro- and nano-porous silicon membranes or microoptoelectromechanical systems), silica glass/microreactors (i.e., plasmonic, Raman spectroscopy or optical microcavities) or polymer-based devices (i.e., 3D-printed, laser-engraved channels). Furthermore, we have evaluated inter alia the efficiency of various fabrication approaches for bioelectrochemical systems, biocatalysis, photochemical synthesis, or single nanoparticle spectroelectrochemistry. We envisioned the miniaturization of applied techniques such as cathodoluminescence, surface plasmon resonance, surface-enhanced Raman spectroscopy, voltametric and amperometric methods in the spectroelectrochemical microdevices. The research challenges and development perspectives of microfluidic, and spectroelectrochemical devices were also elaborated on.
Microporous N-Doped Carbon Obtained from Salt Melt Pyrolysis of Chitosan toward Supercapacitor and Oxygen Reduction Catalysts
- Maria Rybarczyk
- Karolina Cysewska
- Recep Yuksel
- Marek Lieder
2022 Pełny tekst Nanomaterials
The direct carbonization of low-cost and abundant chitosan biopolymer in the presencesalt eutectics leads to highly microporous, N-doped nanostructures. The microporous structureeasily manufactured using eutectic mixture (ZnCl2 -KCl) and chitosan. Potassium ions here can act as an intercalating agent, leading to the formation of lamellar carbon sheets, whereas zinc chloride generates significant porosity. Here, we present an efficient synthetic way for microporous carbon nanostructures production with a total nitrogen content of 8.7%. Preliminary studies were performed to show the possibility of the use of such material as a catalyst for supercapacitor and ORR. The textural properties enhanced capacitance, which stem from improved accessibility of previously blocked or inactive pores in the carbon structure, leading to the conclusion that porogen salts and molten salt strategies produce materials with tailor-made morphologies. The synergistic effectthe eutectic salt is seen in controlled porous structures and pore size, and the micropores boosting adsorption ability.
Microwave Alignment and Displacement Sensors in Groove Gap Waveguide Technology
- Ali Karami Horestani
- Zahra Shaterian
- Michał Mrozowski
2022
This paper is aimed at presenting highly sensitive microwave displacement and alignment sensors. With this goal, the method of realizing mechanically tunable cavity resonators in groove gap waveguides technology is presented. The resonance frequency of the cavity is then used for displacement sensing. It is also demonstrated that the symmetry properties of a pair of groove gap waveguide cavities can be used to improve the robustness of the sensor to variations in ambient conditions. The proposed sensor also benefits from a reference zero, thus can be used as an alignment sensor. A very good sensitivity of S=1.25 GHz/mm is achieved, which can be easily improved by scaling the operating frequency.
Microwave Characterization of Dielectric Sheets in a Plano-Concave Fabry-Perot Open Resonator
- Bartlomiej Salski
- Tomasz Karpisz
- Małgorzata Warecka
- Piotr Kowalczyk
- Piotr Czekala
- Pawel Kopyt
2022 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Despite its long history, a double-concave (DC) Fabry-Perot open resonator (FPOR) has recently gained popularity in the characterization of dielectrics in the 20–110 GHz range, mainly due to such novel accomplishments as full automation of the measurement process and the development of even ore accurate and computationally efficient electromagnetic model. However, it has been discovered that such a DC resonator suffers from unwanted mode coupling present for electrically thick samples. Such limitations are missing in a plano-concave (PC) FPOR. For those reasons, the aim in this article is to apply the newly proposed scattering matrix method in the study of major properties of that kind of a resonator and, subsequently, to propose a new tool dedicated to the measurement of dielectrics without the aforementioned limits. For the first time in the literature, major properties of the PC FPOR with and without the sample, such as resonance frequencies, geometric factors, energy filling factors, and the resulting quality factor, are rigorously computed. Moreover, their impact on the accuracy of the loss tangent extraction is investigated. Such a study, which opens the way for accurate microwave characterization of electrically thick dielectric sheets above 20 GHz, has never been performed before. The whole complex permittivity extraction algorithm presented in this article is validated experimentally by measuring wellknown materials, namely, C-plane sapphire, silicon, and Z-cut monocrystalline quartz.
Microwave Ring Resonator Based Pressure Sensor
- Abhishek Kumar Jha
- Michał Mrozowski
2022
This paper demonstrates a microwave pressure sensor, which is based on microstrip line-fed ring resonators. The first ring resonator is loaded with the concentric cylindrical shafts, while the same number of the hollow shanks as the shafts are mounted on the second ring resonator. The arrangement of the cylindrical shaft and hollow shank allows for mechanical movement between two substrates while maintaining electrical contact. The external pressure applied to the substrate translates the cylindrical shaft into the hollow shank, resulting in a change in the resonant frequency. The proposed sensor is found to measure an applied pressure up to 40.5 kPa with an average sensitivity of 9.62 kHz/Pa.
Miłość
- Krzysztof Wróblewski
2022
Miłość Czymkolwiek jest - uczuciem dodającym skrzydeł, niszczącą siłą, miłością fizyczną, platoniczną, narcystyczną, do ludzi, do świata czy do „trzech pomarańczy” - bez jej inspiracji nie byłoby sztuki. Co prawda, teraz wystarczy kliknąć odpowiedni emotikon i już mamy obrazek miłości, wybieramy sobie emocje i przesłanie. Ale dzisiaj, w obliczu wojny i krzywdy wyrządzanej niewinnym, hasło „miłość” nie brzmi banalnie ani patetycznie, bo to z niej bierze się siła, która każe ludziom czynić dobro, pomagać innym wbrew wszystkiemu, przezwyciężając własną słabość i strach. Niech sztuka, oparta na takiej inspiracji, będzie sprzymierzeńcem dobra.
Mineral Composition of Dietary Supplements-Analytical and Chemometric Approach
- Joanna Brzezińska-Rjek
- Małgorzata Rutkowska
- Justyna Brzezicha
- Piotr Konieczka
- Magdalena Prokopowicz
- Małgorzata Grembecka
2022 Pełny tekst Nutrients
There is a lack of data on the actual composition and effectiveness of beetroot-based dietary supplements. The research aimed to determine the profile of 22 elements (Na, K, Ca, Mg, P, Fe, As, Se, Zn, Cu, Ag, Co, Ni, Mo, Al, Mn, Sr, Cr, Ba, Li, Pb, Cd) in beetroot and its supplements by the microwave plasma atomic emission spectrometry (MP-AES) method. The analytical procedure was optimised and validated. The composition of both groups was compared, assessing compliance with the recommended daily doses for the chosen elements, and the health risk was estimated. Furthermore, chemometric analysis was applied. Beetroots constituted a significant source of elements, especially K, Na, Mg, Ca, P, in contrast to supplements which contained their negligible amounts except from iron-enriched products which provided notable amounts of Fe (38.3–88% of the Recommended Dietary Allowance for an adult male from 19 to 75 years old). Some products were significantly contaminated with toxic elements (As, Cd). Factor and cluster analyses were helpful in the differentiation of beetroot and its supplements in view of their type (vegetable, supplement, iron-enriched supplement), origin, type of cultivation (conventional, organic), and form (capsule, tablet) based on their mineral composition. The obtained results indicate the need for more stringent control of supplements, as they may pose a significant health risk to consumers.
Miniaturized, green salting-out liquid–liquid microextraction coupled with GC–MS used to evaluate biogenic amines in wine samples
- Magdalena Fabjanowicz
- Anna Różańska
- Kaja Kalinowska
- Justyna Płotka-Wasylka
2022 Pełny tekst MICROCHEMICAL JOURNAL
Monitoring of the biogenic amines (BAs) content in food products, including wine, is important due to the health and safety of consumers and from the quality control point of view. In a given study, simultaneous derivatization and salting-out liquid–liquid microextraction (SALLME) coupled with GC–MS for BAs determination from wine samples was developed. For the optimization the Box-Behnken design was applied, where three independent factors were evaluated: the amount of NaCl, amount of EtAc and vortexing time. The proposed approach is characterized by good sensitivity expressed in the detection limit between 1.5 and 8.1 µg/L, good recovery on the level 84 – 106% and good reproducibility, it is fast (20 min) and easy to perform. Moreover, the BAs index (BAI) was applied in order to assess the quality of examined wines. BAI value for most of wine samples were below 2 mg/L what indicates that selected wines were of high quality.
Miniaturized Metal-Mountable U-shaped Inductive-Coupling-Fed UHF RFID Tag Antenna with Defected Microstrip Surface
- Fuad Erman
- Michał Kozieł
- Effariza Hanafi
- Rawan Soboh
- Stanisław Szczepański
2022 Pełny tekst IEEE Access
This study presents a novel miniature ultra-high frequency (UHF) radio frequency identification (RFID) tag for metallic objects. Its arrangement includes a U-shaped feeder, which is inductively coupled to two E-type connected patches. Size reduction is achieved by means of utilizing the U-shaped feeder, and introducing a defection in the connection between the two E-type patches. The defection in the connection area between the patches modifies the current distribution by increasing the electrical length, and the antenna inductance. Furthermore, increasing the length of the U-shaped structure significantly raises the antenna inductance and, consequently, the flexibility of the structure for the impedance matching purpose. Polytetrafluoroethylene (PTFE) is employed for the fabrication of the designed tag. The tag’s size is 65 × 20 × 1.5 , and does not require any complex fabrication process such as utilization of metal vias and/or shorting stubs. It is observed that with 4W EIRP, the measured detection distance is 6.9 when it is attached onto metal sheets (20 × 20 ), and 5.54 when it is in free space. The measurement results also are in good agreement with the simulated results.
Minimal Sets of Lefschetz Periods for Morse-Smale Diffeomorphisms of a Connected Sum of g Real Projective Planes
- Grzegorz Graff
- Adrian Myszkowski
2022 Pełny tekst
The dataset titled Database of the minimal sets of Lefschetz periods for Morse-Smale diffeomorphisms of a connected sum of g real projective planes contains all of the values of the topological invariant called the minimal set of Lefschetz periods, computed for Morse-Smale diffeomorphisms of a non-orientable compact surface without boundary of genus g (i.e. a connected sum of g real projective planes), where g varies from 1 to 54.
Minimal surfaces and conservation laws for bidimensional structures
- Victor Eremeev
2022 Pełny tekst MATHEMATICS AND MECHANICS OF SOLIDS
We discuss conservation laws for thin structures which could be modeled as a material minimal surface, i.e., a surface with zero mean curvatures. The models of an elastic membrane and micropolar (six-parameter) shell undergoing finite deformations are considered. We show that for a minimal surface, it is possible to formulate a conservation law similar to three-dimensional non-linear elasticity. It brings us a path-independent J-integral which could be used in mechanics of fracture. So, the class of minimal surfaces extends significantly a possible geometry of two-dimensional structures which possess conservation laws.
Mining Knowledge of Respiratory Rate Quantification and Abnormal Pattern Prediction
- Piotr Szczuko
- Adam Kurowski
- Piotr Odya
- Andrzej Czyżewski
- Bożena Kostek
- Beata Graff
- Krzysztof Narkiewicz
2022 Pełny tekst Cognitive Computation
The described application of granular computing is motivated because cardiovascular disease (CVD) remains a major killer globally. There is increasing evidence that abnormal respiratory patterns might contribute to the development and progression of CVD. Consequently, a method that would support a physician in respiratory pattern evaluation should be developed. Group decision-making, tri-way reasoning, and rough set–based analysis were applied to granular computing. Signal attributes and anthropomorphic parameters were explored to develop prediction models to determine the percentage contribution of periodic-like, intermediate, and normal breathing patterns in the analyzed signals. The proposed methodology was validated employing k-nearest neighbor (k-NN) and UMAP (uniform manifold approximation and projection). The presented approach applied to respiratory pattern evaluation shows that median accuracies in a considerable number of cases exceeded 0.75. Overall, parameters related to signal analysis are indicated as more important than anthropomorphic features. It was also found that obesity characterized by a high WHR (waist-to-hip ratio) and male sex were predisposing factors for the occurrence of periodic-like or intermediate patterns of respiration. It may be among the essential findings derived from this study. Based on classification measures, it may be observed that a physician may use such a methodology as a respiratory pattern evaluation-aided method.
Misje i misjonarska retoryka w zarządzaniu platformami mediów
- Jan Kreft
2022
Trudno o bardziej znane i poruszające zbiorową wyobraźnię przekazy cyfrowych platforma, niż zapisy ich misji. Nie tylko łatwo wyjaśniają one rolę organizacji, ale zapewniają racjonalizację tego, kto lub czym jest coś lub jak działa. Dla Facebooka, Google i wielu innych organizacji pragnących „zmienić świat na lepszy” są elementem samonapędzającego się mechanizmu utwierdzającego w słuszności obranej drogi. W przypadku cyfrowych platform mediów zapisy misji nie tytko są częścią narracji kształtujących ich tożsamość organizacyjną, ale formują misjonarski charakter organizacji. W ich przypadku dochodzi jednak do powstawania zniekształceń komunikacyjnych: pod presją osiągania podstawowych celów rynkowych tak konstruują przekazy misjne, by powstały korzystne konteksty społeczne i polityczne1. Misje są zatem formą autokreacji - misjonarskiej retoryki konfrontowanej z obawami o wpływ (władzę) platform na kulturę i przekonaniem, że ani korporacje nowych technologii i mediów, ani ich produkty nie tylko nie czynią świata jednoznacznie lepszym, ale oferują przede wszystkim uporanie się z trywialnymi problemami (PDF) J. KREFT - Misje i misjonarska retoryka. Available from: https://www.researchgate.net/publication/365476703_J_KREFT_-_Misje_i_misjonarska_retoryka [accessed Jan 25 2023].