Search results for: lead refining

• The influence of the local pipeline leak on water hammer properties

  Publication

  • A. Kodura
  • K. Weinerowska-Bords

  - Year 2007

  Przedstawiono wyniki eksperymentalnej i numerycznej analizy zjawiska uderzenia hydraulicznego. Pomiary przeprowadzono dla przewodu MDPE o długości 36 m, w którym zamodelowano lokalną nieszczelność. W tym celu, w pewnej odległości od zaworu umieszczonego na końcu przewodu zainstalowano kształtki imitujące lokalny wyciek. Przeprowadzono analizę otrzymanych charakterystyk ciśnienia i wyznaczono parametry: okres oscylacji, amplitudę...

• Shortening and non linear load settlement behaviour of piles.

  Publication

  • K. Gwizdała

  - Studia Geotechnica et Mechanica - Year 2003

  Przedstawiono praktyczne wartości współczynnika B do obliczeń skrócenia trzonu pali. W analizie zastosowano metodę funkcji transformacyjnych t-z oraz q-z. Wykorzystano wyniki próbnych obciążeń statycznych pali, w sumie 184 pali próbnych.

• Approximate and analytic flow models for leak detection and identification

  Publication

  • M. S. Tatara
  • Z. Kowalczuk

  - International Journal of Applied Mathematics and Computer Science - Year 2024

  The article presents a comprehensive quantitative comparison of four analytical models that, in different ways, describe the flow process in transmission pipelines necessary in the task of detecting and isolating leaks. First, the analyzed models are briefly presented. Then, a novel model comparison framework was introduced along with a methodology for generating data and assessing diagnostic effectiveness. The study presents basic...

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• Numerical analysis of cylindrical shell subjected to explosive load

  Publication

  • A. Pestka

  - Year 2015

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• Stability and load bearing capacity of a truss with elastic braces

  Publication

  • M. Krajewski
  • P. Iwicki

  - Year 2014

  The present paper is devoted to the numerical and experimental investigations of stability of a truss stiffened by elastic braces. The model of a real roof truss scaled by factor ¼ was investigated. In the research the linear buckling and non-linear static analysis of the truss shell and beam model with geometric and material non-linearity is presented. The initial imperfections were assumed in the form of the first buckling mode....

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• Bioactive core material for porous load-bearing implants

  Publication

  • S. Sobieszczyk
  • M. Melaniuk
  • A. Zieliński

  - Advances in Materials Science - Year 2012

  So far state of knowledge on biodegradable materials is reviewed. Among a variety of investigated materials, those composed of polymers and ceramics may be considered as only candidates for a core material in porous titanium alloy. The collagen and chitosan among natural polymers, polyhydroxy acids among synthetic polymers, and hydroxyapatite and tricalcium phosphate among ceramics are proposed for further research. Three essential...

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• Integration of Lean Manufacturing with ISO Management Systems in Enterprise

  Publication

  • M. Wirkus
  • A. Chmielarz

  - Management and Production Engineering Review - Year 2018

  Lean manufacturing [LM], quality management system and environmental management system are clear initiatives with a goal of improving effectiveness and efficiencies of organizations. Many organisations tackle lean philosophy, ISO standards individually but this kind of attempt do not focus on the synergy and the advantage from the potential collaboration. This paper aims to present the possibility of integration Lean Management...

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• The Influence of External Load on the Performance of Microbial Fuel Cells

  Publication

  • S. Potrykus
  • L. Fernando Luis
  • J. Nieznański
  • D. Karkosiński
  • F. Fernandez-Morales

  - ENERGIES - Year 2021

  In this work, the effect of the external load on the current and power generation, as well as on the pollutant removal by microbial fuel cells (MFCs), has been studied by step-wise modifying the external load. The load changes included a direct scan, in which the external resistance was increased from 120 Ω to 3300 Ω, and a subsequent reverse scan, in which the external resistance was decreased back to 120 Ω. The reduction in the...

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• Bead-on-Plate Underwater Wet Welding on S700MC Steel

  Publication

  • J. Tomków
  • A. Świerczyńska
  • M. Landowski
  • A. Wolski
  • G. Rogalski

  - Advances in Science and Technology Research Journal - Year 2021

  The participation of high strength steels in marine and offshore structures is increasing, which makes it necessary to develop recommendations for underwater repair welding works. The article presents the results of bead-on-plate welded specimens made of S700MC high strength steel in underwater wet welding conditions by covered elec- trodes. Three specimens with heat input values in the range 0.91-1.05 kJ/mm were made. The specimens...

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• Performance of organic coatings upon cyclic mechanical load

  Publication

  • M. Szociński
  • K. Darowicki

  - PROGRESS IN ORGANIC COATINGS - Year 2020

  A number of engineering structures fail due to the fatigue damage resulting from cyclic mechanical stress. However, as far as organic coatings are concerned this degradation factor remains underestimated. In the paper the authors propose a methodology combining global electrochemical impedance spectroscopy and local atomic force microscopy measurements for evaluation of coating resistance to an impact of repetitive mechanical stress. Typical...

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• LEAN MANAGEMENT IN HIGHER EDUCATION INSTITUTIONS. HOW TO BEGIN?

  Publication

  • P. Grudowski
  • M. Wiśniewska

  - Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska - Year 2019

  The objective of this article is to present an outline of a concept aimed at identifying the possibilities of using Lean Management foundations in determining the sources of irregularities occurring in university processes from the perspective of various stakeholder groups. A research methodology is presented that creates the basis for initiating programmes modernising university processes in line with the principles of the LM...

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• REVISING ENTREPRENEURIAL ORIENTATION (EO) IN SOCIAL ENTREPRENEURSHIP, QUALITATIVE EVIDENCE FROM WORK INTEGRATION SOCIAL ENTERPRISES (WISES) FROM POLAND

  Publication

  • M. Starnawska

  - Year 2017

  Entrepreneurial behaviour and entrepreneurial orientation (EO) of (commercial) entrepreneurship. have received significant scholarly attention in entrepreneurship and management research However, there are insufficient attempts discussing such behaviour and EO in non-profit, and particularly social entrepreneurship context, arguing that EO is higher in such contexts, or remains the same, some new EO dimensions are proposed, existing...

• ORL-head and neck nursing : official journal of the Society of Otorhinolaryngology and Head-Neck Nurses

  Journals

  ISSN: 1064-3842

• Journal of Head & Neck Physicians and Surgeons

  Journals

  ISSN: 2347-8128

• International Journal of Head & Neck Surgery

  Journals

  ISSN: 0975-7899

• Otolaryngology - Head and Neck Surgery (Tokyo)

  Journals

  ISSN: 0914-3491

• Japanese Journal of Head and Neck Cancer

  Journals

  ISSN: 1349-5747

• Journal of Otolaryngology-Head & Neck Surgery

  Journals

  ISSN: 1916-0216

• ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY

  Journals

  ISSN: 0886-4470

• Deep eutectic solvent (DES) with silver nanoparticles (Ag-NPs) based assay for analysis of lead (II) in edible oils

  Publication

  • H. Haq
  • R. Bibi
  • M. Balal
  • F. Safi
  • S. Ullah
  • R. Castro-Muñoz
  • G. Boczkaj

  - FOOD CHEMISTRY - Year 2022

  This paper presents an application of silver nanoparticles impregnated by Deep Eutectic Solvents (DES) as ultrasonication aided microextraction system for lead (II) determination in edible oils. The paper presents a systematic optimization of method parameters and examples of its application for analysis of real samples. Maximum recovery for lead (II) extraction was obtained for choline chloride and phenol with a 1:2 molar ratio....

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• Lead(II) coordination polymers with imidazole-4- and pyrazole-3-carboxylate isomeric linkers: Structural diversity and luminescence properties

  Publication

  • M. Kowalik
  • J. Masternak
  • K. Kazimierczuk
  • O. Khavryuchenko
  • B. Kupcewicz
  • B. Barszcz

  - JOURNAL OF SOLID STATE CHEMISTRY - Year 2018

  Using 1H-imidazole-4-carboxylic acid (4imCOOH) and 1H-pyrazole-3-carboxylic acid (3pyrCOOH) coordination polymers [Pb(4imCOO)2(H2O)]n (1) and [Pb2(3pyrCOO)4]n (2) were constructed. Obtained polymers were characterized via FT-IR, X-ray, PL and TG methods. The coordination polyhedron around Pb(II) in 1 is described as distorted pentagonal pyramid with hemidirected coordination sphere (based on DFT calculations). Compound 2 consists...

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• Zieleń miejska Gdyni okresu międzywojennego oraz problematyka jej zachowania = Urban greenery of Gdynia of interwar period and the issues of its retaining

  Publication

  • M. Zaworska

  - Year 2020

  URBAN GREENERY OF GDYNIA OF INTERWAR PERIOD AND THE ISSUES OF ITS RETAINING The subject of this article is the urban greenery arrangement in interwar Gdynia and the issues of its retaining after the II World War. The article will concern retaining the authenticity and integrity of the historic urban greenery of Gdynia, both greenery layouts and the plant material creating it. The author of the article will present in what...

• Investigation of stability and limit load of a truss overhead opened bridge

  Publication

  • Ł. Żmuda-Trzebiatowski
  • P. Iwicki
  • M. Krajewski

  - Year 2016

  The paper presents selected methods of determining stability and limit load of a truss top chord in opened bridges. These methods include linear buckling and non-linear static analysis based on the finite element method and algorithms based on design code procedures. The described methods were tested on an example of a steel footbridge situated in Straszyn. The results of stability analysis are compared. The results of geometrical...

• Building culture written into the landscape – how to read spatial tradition

  Publication

  • J. Borucka

  - Year 2016

  The article presents a discussion on the experimenting with material leading to practical so-lutions in building structure in the context of the tradition of the place. It sketches out the practical aspects of creation of space while working with different local materials during the intensive workshops within the Structures in Building Culture IP programme. This kind of unique possibility to practice raw materials gives also the...

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• Correlation between natural frequencies and buckling load in a stiffened shell

  Publication

  • Ł. Żmuda-Trzebiatowski
  • P. Iwicki

  - Year 2018

  The paper deals with correlation between natural frequencies and buckling load of a stiffened shell composed of corrugated sheets and vertical stiffeners (columns). The simplified shell segment represents the buckling behaviour of a whole silo with sparsely distributed columns. The paper covers variants of linear buckling anal-yses, dynamic eigenvalue analyses and geometrically non-linear analyses of a segment modelled with shell...

• Load Tests of the Movable Footbridge Over the Port Canal in Ustka

  Publication

  • M. Miśkiewicz
  • Ł. Pyrzowski

  - Year 2017

  The paper presents the acceptance tests carried out on the open footbridge over the port canal in the Port of Ustka. The steel footbridge construction is created by a single pylon to which a movable truss span is suspended with a theoretical span of 52.3 m. The studies about load test of the object included static and dynamic extortion and measurements. In static tests the ballast was of pallets with concrete blocks. Dynamic studies...

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• DISPLACEMENT MEASUREMENTS DURING LOAD TESTING OF THE RAILWAY ARCH BRIDGE

  Publication

  • M. Miskiewicz

  - Year 2017

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• Compensation of Dead Time Effects for Shunt Active Power Filters

  Publication

  • A. Cichowski
  • W. Śleszyński
  • J. Nieznański
  • P. Szczepankowski

  - Year 2015

  The paper presents a comprehensive approach to the compensation of the grid current distortion for shunt active power filter systems. Four different sources of current distortion are addressed: imperfect grid synchronization caused by the distortion in the grid voltages, time delays in the estimation of compensating currents and grid voltages, fluctuations of the dc bus voltage, and the distortion of inverter output voltages due...

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• Cam mechanism designing with account of the technological load and energy costs

  Publication

  • Y. Podgornyj
  • V. Skeeba
  • A. Kirillov
  • O. Maksimchuk
  • P. Skeeba

  - Obrabotka Metallov-Metal Working and Material Science - Year 2017

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• Cadmium inhibitory action leads to changes in structure of ferredoxin:NADP+ oxidoreductase

  Publication

  • J. Grzyb
  • M. Gagoś
  • B. Myśliwa-Kurdziel
  • M. Bojko
  • W. Gruszecki
  • A. Waloszek
  • K. Strzałka

  - JOURNAL OF BIOLOGICAL PHYSICS - Year 2012

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• The influence of compressive gear on maximal load lifted in competitive powerlifting.

  Publication

  • M. Wilk
  • M. Krzysztofik
  • M. Bialas

  - Biology of Sport - Year 2020

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• Wdrażanie Lean Six Sigma w MŚP sektora produkcyjnego

  Publication

  • P. Grudowski
  • E. Zajkowska
  • M. Bigand
  • E. Castelain

  - Year 2009

  W opracowaniu przedstawiono rozważania dotyczące wprowadzania metodyki Lean Six Sigma w sektorze małych i średnich przedsiębiorstw produkcyjnych. Zaprezentowano odwołującą się do kontekstu tej metodyki charakterystykę MŚP oraz zaproponowano 5 etapowy model implementacyjny uwzględniający czynniki wpływające na skuteczne i adekwatne do możliwości i potrzeb MŚP adaptowanie tego podejścia.

• Dynamic response of the PEM fuel cell to step change load

  Publication

  • J. Cieśliński
  • T. Kaczmarczyk
  • B. Dawidowicz
  • S. Smoleń

  - Year 2009

  Przedstawiono charakterystyki dynamiczne ogniwa paliwowego typu PEM o mocy 2.5 kW obciążanego sygnałem skokowym o wartościach od 1 A do 50 A.

• Dynamic response of the PEM fuel cell to variable load conditions

  Publication

  • J. Cieśliński
  • T. Kaczmarczyk
  • B. Dawidowicz
  • S. Smoleń

  - Year 2010

  Opisano układ zasilania oparty na 2 ogniwach paliwowych typu PEM o mocy 1.2 kW każde. Omówiono problem ograniczenie ogniwa paliwowego przez drugą zasadę termodynamiki. Przedstawiono charakterystyki układu w zależności od sygnału obciążenia typu: skok jednostkowy, półsinusoidalny, trójkątny, prostokątny i trapezowy.

• Modeling of Wireless Traffic Load in Next Generation Wireless Networks

  Publication

  • H. Manzoor

  - Year 2021

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• Extracellular miRNAs as Biomarkers of Head and Neck Cancer Progression and Metastasis

  Publication

  • Z. Nowicka
  • K. Stawiski
  • B. Tomasik
  • W. Fendler

  - International Journal of Molecular Sciences - Year 2019

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• Delving into the Therapeutic Potential of Carica papaya Leaf against Thrombocytopenia

  Publication

  • S. Munir
  • Z. Liu
  • T. Tariq
  • R. Rabail
  • P. Kowalczewski
  • J. Lewandowicz
  • A. Blecharczyk
  • M. Abid
  • M. Inam-Ur-Raheem
  • R. Aadil

  - MOLECULES - Year 2022

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• Propeller Load Modelling In The Calculations Of Marine Shafting Torsional Vibrations

  Publication

  • N. Vulić
  • K. Bratić
  • B. Lalić
  • L. Stazić

  - Pedagogika-Pedagogy - Year 2021

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• Optical fiber head for monitoring of heart rate and blood oxygenation

  Publication

  • K. Hoffmann
  • A. Baranowska
  • J. Zmojda
  • M. Kochanowicz
  • D. Dorosz

  - Year 2016

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• Measurements of head surfaces of endoprostheses = Pomiary powierzchni głów endoprotez

  Publication

  • J. Cwanek
  • K. Wierzcholski

  - Year 2006

  W niniejszej pracy rozpatrywane są połowicze i całkowite endoprotezy. Rezultaty badań koncentrują się na wynikach pomiarów chropowatości powierzchni głów połowiczych i całkowitych endoprotez stawu biodrowego. Pomiary dokonane zostały dla połowiczych endoprotez z głową przyspawaną do trzpienia oraz endoprotez Frankobala z dwuczęściową głową osadzoną na sworzniu. Pomiary powierzchni dla próbek powierzchni głowy, całkowitej i połowiczej...

• Eigenvalue approach to synthesis of prototype filters with source/load coupling

  Publication

  • P. Kozakowski
  • A. Lamęcki
  • P. Sypek
  • M. Mrozowski

  - Year 2005

  Artykuł przedstawia nową, szybko zbieżną, technikę syntezy macierzy sprzężeń filtrów o charaktrystyce Czebyszewa. Synteza opiera się na zastosowaniu metody najmniejszych kwadratów w odniesieniu do wartości własnych macierzy sprzężeń oraz jej podmacierzy.

• On bounded load routings for modeling k-regular connection topologies

  Publication

  • A. Kosowski
  • M. Małafiejski
  • P. Żyliński

  - Year 2005

  W pracy analizowane są problemy modelowania k-regularnych topologii sieci komputerowych z punktu widzenia routingu typu point-to-point. Zaprezentowane są algorytmy oraz przeprowadzona jest analiza złożoności obliczeniowej.

• Advanced control of induction motor based on load angle estimation.

  Publication

  • J. Guziński
  • Z. Krzemiński
  • H. Abu-Rub
  • H. Toliyat

  - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS - Year 2004

  W artykule przedstawiono układ sterowania silnikiem asynchronicznym klatkowy wykorzystujący estymację kąta obciążenia pracujący bez pomiaru prędkości obrotowej. W artykule przedstawiono zasadę działania układu i motodę odtwarzania zmiennych opartą w części o zależności stanu ustalonego. Przedstawiono zrealizowany regulator rozmyty kąta obciążenia. Zaprezentowane zostały wyniki symulacji i eksperymentu przeprowadzone z użyciem...

• Tests of soil-geotextile systems in changeable hydraulic head conditions.

  Publication

  • W. Sterpejkowicz-Wersocki
  • A. Bolt

  - Year 2004

  Artykuł zawiera opis stanowiska badawczego i przeprowadzonych badań filtracji w układzie grunt-geowłóknina w kierunku normalnym do płaszczyzny geosyntetyku.

• Advanced current regulated PWM inverter with simplified load model.

  Publication

  • H. Abu-Rub
  • J. Guziński
  • Z. Krzemiński

  - Year 2004

  W artykule przedstawionio nowy regulator prądu stojana silnika asynchronicznego zasilanego z falownika napięcia. Regulator wykorzystuje obliczenia siły elektromotorycznej silnika. Rozważonio wpływ zmian parametrów silnika na działanie regulatora. Wykorzystano uproszczony model silnika bez uwzględnienienia rezystancji stojana. Zastosowano stałą częstotliwość próbkowania prądu. Układ zrealizowania w programie symulacyjnym oraz na...

• Control of voltage source inverter without dead-time effects.

  Publication

  • A. Lewicki
  • Z. Krzemiński

  - Year 2004

  W artykule zaproponowano metodę dokładnego generowania wektora napięcia o małej amplitudzie w falowniku napięcia. Zaprezentowano metodę modulacji szerokości impulsów, w której wyeliminowano koniecznosć wprowadzania czasów martwych oraz kompensacji ich wpływu na napięcie wyjsciowe przekształtnika

• Temper bead welding of S420G2+M steel in water environment

  Publication

  • D. Fydrych
  • A. Świerczyńska
  • G. Rogalski
  • J. Łabanowski

  - Advances in Materials Science - Year 2016

  The article presents the idea of the use of Temper Bead Welding (TBW) technique to improve the weldability of high strength steel at underwater wet welding conditions. Wet welding method with the use of covered electrodes is described. This work shows results of metallographic examinations and hardness measurements of samples of S420G2+M steel with weld beads performed under water. It has been shown that Temper Bead Welding technique...

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• Displacement measurements during load testing of railway arch bridge

  Publication

  • M. Miśkiewicz
  • K. Makowska-Jarosik

  - Year 2017

  The paper discusses issues concerning load tests carried out on a twin-track, arch railway bridge over the Martwa Wisla river in Gdansk. Currently, it is the bridge with the longest span in its class in Poland. The load-bearing structure consists of three no-hinge arches and an orthotropic deck suspended from them. The studies of the structure assumed the performing of static and dynamic tests. The paper presents the method for...

• Static load test on concrete pile – instrumentation and results interpretation

  Publication

  • A. Krasiński
  • M. Wiszniewski

  - Year 2017

  For some time (since 8-10 years in Poland) a special static load tests on instrumented piles are carried out. Such studies are usually of a scientific nature and provide detailed quantitative data on the load transfer into the ground and characteristics of particular soil layers interaction with a pile shaft and pile base. Deep knowledge about the pile-subsoil interaction can be applied for a various design purposes, e.g. numerical...

• Wsparcie informatyczne koncepcji Lean Management oraz Six Sigma

  Publication

  • P. Grudowski
  • A. Czarnacki

  - Year 2013

  W rozdziale tym przedstawiono kluczowe aspekty integracji dwóch najważniejszych obecnie koncepcji optymalizacji procesów w organizacjach produkujących wyroby materialne oraz świadczących usługi – Six Sigma i Lean Manufacturing. Szczególną uwagę zwrócono na uwarunkowania wsparcia informatycznego tych koncepcji w mniejszych organizacjach.