Search results for: high alpha brainwaves

The propagation of X-ray waves through an optical system consisting of many X-ray refractive lenses is considered. For solving the problem for an electromagnetic wave, a finite-difference method is applied. The error of simulation is analytically estimated and investigated. It was found that a very detailed difference grid is required for reliable and accurate calculations of the propagation of X-ray waves through a multi-lens...

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Effect of high loading of titanium dioxide particles on the morphology and selected properties of natural rubber-based composites

Publication

- IRANIAN POLYMER JOURNAL - Year 2016

The aim of this work was to prepare and characterize the natural rubber vulcanizates contained different amounts of titanium dioxide particles. At first rubber mixture was prepared using a laboratory two-roll mill and then samples were vulcanized in a hydraulic press. The formulation of rubber mixture and rubber-processing technique is based on our earlier investigations. Materials were obtained at the different titanium dioxide...

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Heavy Metals in a High Arctic Fiord and Their Introduction with the Wastewater: A Case Study of Adventfjorden-Longyearbyen System, Svalbard

Publication

- Water - Year 2020

Longyearbyen is the largest settlement on Svalbard archipelago, with 2400 permanent residents and approximately 150,000 tourists visiting every year. The city annually releases approximately 285,000 m3 of untreated wastewater to the nearby Adventfjorden. To date, the environmental impact of this continuous input has been studied mainly regarding the sediments and benthic fauna in the fiord. Here, we present results from a study...

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Investigation of Parallel Data Processing Using Hybrid High Performance CPU + GPU Systems and CUDA Streams

Publication

P. Czarnul

- COMPUTING AND INFORMATICS - Year 2020

The paper investigates parallel data processing in a hybrid CPU+GPU(s) system using multiple CUDA streams for overlapping communication and computations. This is crucial for efficient processing of data, in particular incoming data stream processing that would naturally be forwarded using multiple CUDA streams to GPUs. Performance is evaluated for various compute time to host-device communication time ratios, numbers of CUDA streams,...

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High level synthesis with adaptive evolutionary algorithm for solving reliability and thermal problems in reconfigurable microelectronic systems.

Publication

- Year 2003

Praca dotyczy badań efektywności adaptacyjnego algorytmu ewolucyjnego (AEA)zastosowanego do syntezy wysokiego poziomu układów cyfrowych CMOS w celu zredukowania rozpraszanej przez nie mocy. W wyniku obniżenia poziomu mocy pobieranej przez układ mikroelektroniczny uzyskuje się zmniejszenie szczytowej i średniej temperatury układu scalonego co z kolei prowadzi do wzrostu niezawodności całego systemu. Podczas przeprowadzonych...

Improving Accuracy of Respiratory Rate Estimation by Restoring High Resolution Features With Transformers and Recursive Convolutional Models

Publication

A. Kwaśniewska
M. Szankin
J. Rumiński
A. Sarah
D. Gamba

- Year 2021

Non-contact evaluation of vital signs has been becoming increasingly important, especially in light of the COVID- 19 pandemic, which is causing the whole world to examine people’s interactions in public places at a scale never seen before. However, evaluating one’s vital signs can be a relatively complex procedure, which requires both time and physical contact between examiner and examinee. These re- quirements limit the number...

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Microwave-Induced Processing of Free-Standing 3D Printouts: An Effortless Route to High-Redox Kinetics in Electroanalysis

Publication

K. Kozłowska
M. Cieślik
A. Koterwa
K. Formela
J. Ryl
P. Niedziałkowski

- Materials - Year 2024

3D-printable composites have become an attractive option used for the design and manufacture of electrochemical sensors. However, to ensure proper charge-transfer kinetics at the electrode/electrolyte interface, activation is often required, with this step consisting of polymer removal to reveal the conductive nanofiller. In this work, we present a novel effective method for the activation of composites consisting of poly(lactic...

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A green route for high-performance bio-based polyurethanes synthesized from modified bio-based isocyanates

Publication

- INDUSTRIAL CROPS AND PRODUCTS - Year 2024

The need for sustainability and a circular economy leads to the development of innovative greener materials and technologies. This paper is focused on a novel class of bio-based polyurethanes (PUs) synthesized with the use of bio-monomers including bio-based isocyanates. The novelty of this work is related to the usage of bio-based modified isocyanate via a two-step solvent-free synthesis of novel cast bio-based poly(ester-urethanes)...

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Orientation effects on the fracture behaviour of additively manufactured stainless steel 316L subjected to high cyclic fatigue

Publication

M. Kopec
G. Urvashi
W. Macek
Z. Kowalewski
P. Wood

- THEORETICAL AND APPLIED FRACTURE MECHANICS - Year 2024

In this paper, stainless steel 316L (SS316L) bars were additively manufactured (AM) in three orientations (Z – vertical, XY – horizontal, ZX45 – midway between vertical and horizontal) by using the Laser Powder Bed Fusion Melting (LPBF-M) method. The AM specimens were subjected to load control fatigue testing under full tension and compression (R = -1) at stress amplitudes ±350, ±400 and ±450 MPa. The XY and ZX45 printing orientations...

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The pollutant transport equation for a steady, gradually varied flow in an open channel network: a solution of high accuracy

Publication

R. Szymkiewicz

- TASK Quarterly - Year 2007

W pracy przedstawiono metodę rozwiązania jednowymiarowego równania adwekcji-dyfuzji opisującego transport zanieczyszczeń w warunkach przepływu ustalonego wolnozmiennego w sieci kanałów otwartych. Zastosowano technikę dekompozycji. Zlineoryzowane równanie adwekcji-dyfuzji rozwiązano stosując całkę Duhamela, zaś równanie zacierające człon źródłowy-metodą różnic skończonych. Metoda zapewnia bardzo dużą dokładność rozwiązania nawet...

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Research of low-speed high torque planet motors supplied with oil-in-water emulsion as working liquid.

Publication

P. Śliwiński

- Year 2004

Większość hydraulicznych układów napędowych obecnie jest zasilanych olejami. Ale olej jako medium robocze nie może być stosowany wszędzie tam, gdzie istnieje ryzyko pożaru. dlatego też są stosowane trudnopalne i niepalne ciecze hydrauliczne ja: emulsje, mikroemulsje i roztwory. W referacie opisano stanowisko badawcze zaprojektowane i zbudowane w Katedrze Hydrauliki i Pneumatyki PG, przedstawiono wyniki badań hydraulicznego silnika...

Evaluation of hydrogen degradation susceptibility of high-strength weldable steel subjected to cathodic polarization in sea-water

Publication

J. Ćwiek
P. Domżalicki

- Year 2005

Ocenę podatności stali spawalnych o wysokiej wytrzymałości ich złączy spawanych na kruchość wodorową przeprowadzono z wykorzystaniem próby rozciągania ze stałą, niską szybkością odkształcenia w środowisku wody morskiej przy polaryzacji katodowej. Wykonano próby elektrochemiczne przenikania wodoru w wodzie morskiej dla oceny dyfuzji i pułapkowania wodoru. Badano wpływ bakterii redukujących siarczany na absorpcję wodoru w środowisku...

High-Performance Machine-Learning-Based Calibration of Low-Cost Nitrogen Dioxide Sensor Using Environmental Parameter Differentials and Global Data Scaling

Publication

- Scientific Reports - Year 2024

Accurate tracking of harmful gas concentrations is essential to swiftly and effectively execute measures that mitigate the risks linked to air pollution, specifically in reducing its impact on living conditions, the environment, and the economy. One such prevalent pollutant in urban settings is nitrogen dioxide (NO2), generated from the combustion of fossil fuels in car engines, commercial manufacturing, and food processing. Its...

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A nontargeted approach to determine the authenticity of Ginkgo biloba L. plant materials and dried leaf extracts by liquid chromatography-high-resolution mass spectrometry (LC-HRMS) and chemometrics

Publication

M. Cruz
B. J. Place
L. J. Wood
A. Urbas
A. Wasik
W. F. de Carvalho Rocha

- ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Year 2020

The lack of stringent regulations regarding raw materials for herbal supplements used for medicinal purposes has been a constant challenge in the industry. Ginkgo biloba L. leaf extracts attract consumers because of the supposed positive effect on mental performance and memory. Supplements are produced using dried leaf materials and standardized leaf extracts such as EGb 761. Adulteration of Ginkgo biloba L. plants and extracts...

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Effects of Three-Month Administration of High-Saturated Fat Diet and High-Polyunsaturated Fat Diets with Different Linoleic Acid (LA, C18:2n–6) to α-Linolenic Acid (ALA, C18:3n–3) Ratio on the Mouse Liver Proteome

Publication

K. Liput
A. Lepczyński
A. Nawrocka
E. Poławska
M. Ogłuszka
A. Jończy
W. Grzybek
M. Liput
A. Szostak
P. Urbański... and 3 others

- Nutrients - Year 2021

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Optimization of a Fabric Phase Sorptive Extraction protocol for the isolation of six bisphenols from juice pouches to be analysed by high performance liquid chromatography coupled with diode array detector

Publication

P. Kubica
N. Kalogiouri
A. Kabir
K. G. Furton
V. F. Samanidou

- JOURNAL OF CHROMATOGRAPHY A - Year 2023

Fabric Phase Sorptive Extraction (FPSE) combined with high pressure liquid chromatography using to diode array detection (HPLC-DAD) was applied for the simultaneous determination of bisphenols (BPA, BPB, BPC, BPE, BPF, BPS) in juice pouches. The FPSE procedure was optimized with regards to the critical parameters that affect the performance of the method including the selection of the FPSE membrane type and size, adsorption time,...

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Solid-contact lead(II) ion-selective electrodes for potentiometric determination of lead(II) in presence of high concentrations of Na(I), Cu(II), Cd(II), Zn(II), Ca(II) and Mg(II)

Publication

A. Jasiński
M. Guziński
G. Lisak
J. Bobacka
M. Bocheńska
M. Guzinski

- SENSORS AND ACTUATORS B-CHEMICAL - Year 2015

Lead and its compounds are a serious threat to the environment. Monitoring of this toxic heavy metal is a driving force for the continuous development of novel lead(II) ionophores to be applied in ion-selective electrodes. In this work a highly selective lead(II) ionophore, namely 25,26,27,28-tetrakis(piperidinylthiocarbonylmethylene)-p-tert-butylcalix[4]arene, was used in solid-contact ion-selective electrodes for determination...

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A case study on the rotomolding behavior of black tea waste and bio-based high-density polyethylene composites: Do active compounds in the filler degrade during processing?

Publication

M. Barczewski
Z. Ortega
P. Piaskowski
J. Aniśko
P. Kosmela
J. Szulc

- Composites Part C: Open Access - Year 2024

This study verified the possibility of using waste material from the food industry (black tea) as functional filler of rotomolded biobased high-density polyethylene-based composites. As part of the experimental work, the influence of the materials preparation, i.e., dry blending versus twin-screw extrusion, on the effectiveness of the stabilizing antioxidant effect of the black tea was analyzed. The aim of the work was to verify...

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High energy radiation – Induced cooperative reductive/oxidative mechanism of perfluorooctanoate anion (PFOA) decomposition in aqueous solution

Publication

T. Szreder
J. Kisała
A. Bojanowska-Czajka
M. Kasperkowiak
D. Pogocki
K. Bobrowski
M. Trojanowicz

- Chemosphere - Year 2022

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Effects of Three-Month Feeding High Fat Diets with Different Fatty Acid Composition on Myocardial Proteome in Mice

Publication

A. Lepczyński
M. Ożgo
K. Michałek
A. Dratwa-Chałupnik
M. Grabowska
A. Herosimczyk
K. Liput
E. Poławska
A. Kram
M. Pierzchała

- Nutrients - Year 2021

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Correction: New insights into the role of lattice oxygen in the catalytic carbonization of polypropylene into high value-added carbon nanomaterials

Publication

J. Gong
J. Liu
Z. Jiang
X. Chen
X. Wen
E. Mijowska
T. Tang

- NEW JOURNAL OF CHEMISTRY - Year 2017

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One-step converting biowaste wolfberry fruits into hierarchical porous carbon and its application for high-performance supercapacitors

Publication

X. Xu
K. Sielicki
J. Min
J. Li
C. Hao
X. Wen
X. Chen
E. Mijowska

- RENEWABLE ENERGY - Year 2022

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Fabrication and characterization of a TiBs@MCN cable-like photocatalyst with high photocatalytic performance under visible light irradiation

Publication

S. Li
L. Zhang
Y. Guo
Q. Zhang
M. Aleksandrzak
E. Mijowska
X. Chen

- NEW JOURNAL OF CHEMISTRY - Year 2022

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Multi-criteria Optimization of the Abrasive Waterjet Cutting Process for the High-Strength and Wear-Resistant Steel Hardox®500

Publication

A. Perec
W. Musial
J. Prazmo
R. Sobczak
A. RADOMSKA-ZALAS
A. Fajdek-Bieda
S. Nagnajewicz
F. Pude

- Year 2021

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Possibility of transfer and activation of 'silent' tetracycline resistance genes among Enterococcus faecalis under high-pressure processing

Publication

P. Wiśniewski
A. Zakrzewski
W. Chajęcka-Wierzchowska
A. Zadernowska

- FOOD MICROBIOLOGY - Year 2024

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Preclusion of irreversible destruction of Dr adhesin structures by a high activation barrier for the unfolding stage of the fimbrial DraE subunit

Publication

- BIOCHEMISTRY-US - Year 2009

Fimbrie Dr uropatogennych szczepów Escherichia coli stanowią przykład eksponowanych powierzchniowo struktur adhezyjnych podlegających biogenezie według zakonserwowanego, pośród bakterii Gram-ujemnych, systemu "chaperone-usher" ("białko opiekuńcze-zewnątrzbłonowe białko kanałowe"). Powyższe struktury adhezyjne są niezbędne w procesie specyficznej adhezji bakterii do receptorów zlokalizowanych na powierzchni docelowych komórek gospodarza....

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Energy of the City in High Quality Public Spaces in the Presence of Water.The Role of Water in Contemporary Public Spaces in Paris

Publication

I. Burda

- Year 2012

W artykule zwrócono uwagę na jeden z aspektów energii miasta - jakość przestrzeni publicznych. Wykazano istotną rolę wody w kształtowaniu przestrzeni publicznych wysokiej jakości w obrębie przekształconych obszarów poprzemysłowych Paryża. Odpowiednie wykorzystanie nadwodnego położenia, bądź wprowadzenie elementów z obecnością wody, pozwoliło stworzyć najbardziej atrakcyjne i niepowtarzalne miejsca.

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Process control of leakages in refinery reforming plant by means of Normal Phase High Performance Liquid Chromatography (HPLC)

Publication

- Camera Separatoria - Year 2013

Praca dotyczy zbadania możliwości, opracowania nowej procedury badawczej oraz dokonania oznaczeń ¬m-krezolu w strumieniu produktu z procesu reformingu katalitycznego techniką wysokosprawnej chromatografii cieczowej w układzie faz normalnych, z detektorem spektrofotometrycznym typu DAD (NP-HPLC-UV-VIS/DAD). Opracowana procedura stanowi alternatywę dla innych procedur wykorzystujących klasyczne techniki analityczne, albo wykorzystanie...

Effect of Compounding Conditions on Static and Dynamic Mechanical Properties of High Density Polyethylene/Ground Tire Rubber Blends

Publication

- INTERNATIONAL POLYMER PROCESSING - Year 2014

Searching for new and cost-effective methods of waste rubber recycling is a subject of research in many scientific centers in the world. In this paper there are presented results of the research of the extrusion process of cheap and environmentally friendly thermoplastic compositions containing 50 % wt. of masses of ground tire rubber (GTR). The aim of this study was to determine the relationship between the mixing conditions and...

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Morphology control via dual solvent crystallization for high-mobility functionalized pentacene-blend thin film transistors

Publication

M. Lada
M. J. Starink
M. Carrasco
L. Chen
P. Miskiewicz
P. Brookes
M. Franz
D. C. Smith

- JOURNAL OF MATERIALS CHEMISTRY - Year 2011

We present an approach to improving the performance of solution processed organic semiconductor transistors based on a dual solvent system. We here apply this to a blend containing the π-conjugated small molecule 6,13 bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) and polystyrene, which acts as an inert binder. Using a semiconductor-binder solution of two solvents, where the main solvent is a better solvent of the small...

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