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Search results for: GEAR PAIR
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Model of process of wear sidle bearings of self ignition combustion engine
PublicationW artykule została podjęta próba przeanalizowania praktycznej przydatności modelu procesu zużycia głównych łożysk ślizgowych silnika spalinowego o ZS, opisującego zmienną szybkość ich zużycia. Analizie został poddany problem częstych zatrzymań i rozruchów silnika, gdyż z badań statystycznych wynika, że w tym czasie występuje największe zużycie łożysk ślizgowych.
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Near Boundary Acoustic Streaming in Ni-Fe alloy electrodeposition control
PublicationSilny wpływ na osadzanie elektrochemiczne stopów metali mają zjawiska występujące w warstwie dyfuzyjnej, modyfikujące rozkład koncentracji jonów w odmienny sposób dla każdego ze składników. Artykuł przedstawia metodę pobudzania akustycznego prowadzącą do kontrolowanego, jednorodnego osadzania stopów. Metoda ta polega na generowaniu prze-pływu akustycznego prostopadle do powierzchni osadzania, w polu stojącej fali akustycznej równoległej...
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The influence of the cooling conditions on the cutting tool wear and the chip formation mechanism
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Relationship between saw blade teeth wear and kinematics of frame sawingmachines
PublicationPrzedstawiono rezultaty badań zużycia ostrzy pił trakowych i wpływ kinematyki pilarki ramowej na rozkład zużycia poszczególnych ostrzy pił.
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Effect of laser treatment on the wear and corrosion resistance of aluminiumalloy used for pistons
PublicationPrzedstawiono wpływ powierzchniowego laserowego przetapiania w warunkach kriogenicznych na skład chemiczny, mikrostrukturę, mikrotwardość oraz zużycie ścierne i odporność korozyjną stopu AlSi13Mg1CuNi stosowanego na tłoki silników spalinowych. Uzyskano zwiększenie odporności na ścieranie i korozję stopu AlSi13Mg1CuNi.
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Microstructure and wear of cast aluminium alloy with laser modified surface layer
Publicationprzedstawiono wyniki badań zużycia przez tarcie przetopionego laserowo stopuAlSi13MgCuNi w warunkach tribologicznych. Wykazano, iż zużycie i współczyn-nik tarcia są zależne od parametrów obróbki laserowej w warunkach kriogeni-cznych.
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Waste Fires in Poland and Some of their Environmental Implications: A Ten-Year Perspective
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Wear measurements of self-lubricating bearing materials in small oscillatory movement
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Influence of permanent magnetic field on wear performance of dry sliding contacts
PublicationResults of experimental studies concerning the influence of permanent magnetic field on wear of dry sliding contact are presented.It was found that magnetic field of horizontal orientation is causing temporary reduction of material's hardness. It also facilitates and accelerates removal process of wear particles from the contact zone.Formation of bulges, consisting of accumulated and compacted anti-ferromagnetic material produced...
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New kinematic systems in single-sided lapping and their influence on lap wear
PublicationPrevious studies on one-sided lapping allow to state that not only parameters of lapping elements (i.e. properties of workpiece, abrasive grains and lapping plate) impact on a lapping efficiency. Influential are also kinematics and dynamics of the process. It is crucial to control an average velocity of lapping (v), a distribution of tangential acceleration (at), a nominal pressure (p), a lapping time (t) and disposal of workpiece...
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Wear of electroplated diamond tools in lap-grinding of Al2O3 ceramic materials
PublicationCurrent development of modern products, together with ever-increasing demands for their operation and usage, necessitate the search for new processing methods. Abrasive machining is widely used in many industrial areas, especially for processing difficult-to-machine materials such as advanced ceramics. Grinding with lapping kinematics, also called lap-grinding, is still one of the innovative methods of abrasive processing being...
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Effective density of airborne wear particles from car brake materials
PublicationPeople living in urban environments are subject to high health risks due to various anthropogenic sources of airborne particulate matter, including wear of transport vehicle brakes. Studies of airborne particles often require an estimate of the effective particle density, a property that allows correct matching of mass and size characteristics measured by different aerosol instruments. In this study we investigated the effective...
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A COMPARISON OF WEAR PROPERTIES OF WATER LUBRICATED NBR AND PTFE SLIDING BEARINGS
PublicationThe excessive wear of a journal shaft can be caused by many factors, for example, working conditions (e.g., temperaturę, slip speed, the type of lubricant), pressure, the type of material used on the bearings and shafts and their roughness, as well as contamination remaining in the system. This paper presents the roughness profiles co-operating with a rubber (NBR) and polytetrafluoroethylene (PTFE) bushes. The conditions of cooperation...
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Geminate-pair dissociation yield in systems with exponential energetic disorder — A Monte Carlo study
PublicationGeminate electron–hole recombination in systems with exponential energetic disorder is studied by Monte Carlo method. The field and temperature dependencies of geminate-pair dissociation probability are calculated. It is established that the dissociation yield of carrier pairs depends mainly on the extent of carrier thermalization, which influences the Einstein relationship. The approximate limiting temperature is given by Te =...
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Evaluation of zinc content in children’s hair
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Measurement of dileptons with the CBM experiment at FAIR
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Rare pain syndromes of the head and neck
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Generation of charge carriers pairs in tetracene.
PublicationBadano mechanizmy odpowiedzialne za fotogenerację nośników ładunku w polikrystalicznych warstwach tetracenu.
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The market and the fair as a traditional activity of the city
PublicationThe modern commercial center with its impersonal form still on the squares and streets appear traditional markets and its annual versions – fairs, which similarly to the historical commerce - gather different activities of the inhabitants.
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Air Pollution: Monitoring
PublicationThe entry presents an overview of the issues in the field of air pollution monitoring. At the beginning, the general objectives of air monitoring, ambient air quality standards for so-called criteria pollutants, and their sources are discussed. In the next part, both analytical methods and instruments for monitoring of ambient air and stack gases are briefly presented. Additionally, other approaches used in air pollution monitoring,...
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Photocatalytic Air Purification
PublicationW publikacji zostały omówione mechanizmy i wpływ różnych czynników na fotokatalityczne usuwanie zanieczyszczeń powietrza, takich jak lotne związki organiczne (VOC), NOx i SO2. Został dokonany przegląd artykułów i patentów dotyczących przygotowywania fotokatalizatorów i technik ich osadzania na nośnikach. Zaprezentowane zostały przykłady fotoreaktorów przystosowanych do pracy w fazie gazowej. Część opisanych reaktorów może być użyta...
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Molecular epidemiology of Serratia marcescens in two hospitals in Danzig, Poland, over a 5-year period.Molecular epidemiology of Serratia marcescens in two hospitals in Gdańsk, Poland, over a 5-year period.
PublicationW pracy badano zmiany populacji Serratia marcescens w ciągu 5 lat w dwóch szpitalach klinicznych Gdańska. Posłużono się wartościami MIC, wynikami typowania genetycznego RAPD-PCR, PFGE i nową metodą ADSRRS-fingerprinting oraz analizą beta-laktamaz o rozszerzonym spektrum substratowym (ESBL). Dzięki określeniu lekowrażliwości na najnowsze antybiotyki beta-laktamowe wykryto fenotypy wykazujące derepresję cefalosporynazy AmpC u 23%...
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Ultra-high-efficiency near-infrared Ga2O3:Cr3+ phosphor and controlling of phytochrome
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A method for detecting possible near miss ship collisions from AIS data
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Near-Infrared Fluorescence Image-Guided Surgery in Esophageal and Gastric Cancer Operations
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Mechanical Properties and Sliding Wear Resistance of Suspension Plasma Sprayed YSZ Coatings
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2D numerical simulation of tear film dynamics: Effects of shear-thinning properties
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Reclamation of phosphogypsum deposition site Wiślinka near Gdańsk with municipal sewage sludge.
PublicationOmówiono zastosowanie osadów ściekowych do rekultywacji składowiska fosfogipsów w Wiślince k. Gdańska. Głównie pojawiają się problemy ze stabilizacją stoków oraz z sukcesją roślinności i zwalczaniem erozji wiatrowej.
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The Influence of Tool Wear on the Vibrations During Ball end Milling of Hardened Steel
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A new scuffing shock test method for the determination of the resistance to scuffing of coated gears
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Sliding Wear Performance of AlCrN Coating on TiB2/Ti Composites at High Temperatures
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Influence of frame sawing machine´s kinematics on saw blade tooth wear.
PublicationW pracy przedstawiono wpływ kinematyki pilarki ramowej na zużycie ostrzy piłtrakowych.
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Spatio-Temporal Variation in Predation on Artificial Ground Nests: A 12-Year Experiment
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Influence of geometrical and operational parameters on tooth wear in the working mechanism of a satellite motor
PublicationThis article describes the phenomena affecting the wear of the rotor of the working mechanism in a hydraulic satellite motor. The basic geometrical relationships that allow the calculation of the coordinates of the points of contact between the satellite and the rotor and the curvature are presented. A method for calculating the number of contacts of the satellite teeth with the rotor teeth and of the satellite teeth with the curvature...
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Wear forms of heterogeneous electro-rheological fluids working in a hydraulic clutch system
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Optimization of Wastes Compaction Parameters in Case of Gradual Wear of the Briquetting Press Rolls
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Orchiepididymitis in a 14-year-old boy with concurrent SARS-CoV-2 infection
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Evaluation of the Implementation of Hospital Antibiotic Policy in Oncosurgery Ward: A Six-Year Experience
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Wear estimation of current collector contact strips by analysis of a 3D scanning results
PublicationThe technical condition of current collector contact strips is very important when operational reliability of railway transportation is considered. The authors proposed a novel measurement system based on a 3D camera to register the shape and dimensions of the current collector contact strips surface. The system was installed above the railway track for tests in target ambient. During the trial operation a few dozen of contact...
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An evaluation of endemic exposure of citizens living in near a Gdańsk Phosphatic Fertilizer Plant
PublicationPrzeprowadzono ocenę wpływu Gdańskich Zakładów Nawozów Fosforowych FOSFORY na mieszkańców różnych dzielnic Gdańska. Oznaczono - za pomocą Neutronowej Analizy Aktywacyjnej (NAA) stężenia Al, As, Au, Br, Ca, Cl, Cu, Dy, I, In, K, La, Mg, Mn, Mo, Na, S, Sb, Sm, U, V, Zn w próbkach włosów i paznokci stóp, zebranych od 22 osób mieszkających w sąsiedztwie Zakładów oraz od jedenastoosobowej grupy kontrolnej. Podstawowe różnice pomiędzy...
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Wear and corrosion characteristics of the layers type (mn-p) formed on aluminium alloys
Publicationopisano multipleksową metodę wytwarzania warstw zawierających mangan i fosfor (mn-p) na stopach aluminium. przedstawiono wyniki badań mikrostruktury, właściwości tribologicznych i korozyjnych tych warstw. stwierdzono obecność tlenku manganu i fosforku manganu w wytworzonych warstwach oraz ich wysoką twardość, rzędu 1272 hv0,02. warstwy typu (mn-p) zmniejszają podatność stopu alsi13mg1cuni na korozję w 0,01 mh2so4.
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Evaluation of Wear Resistance of Ti alloys used for elements friction of knee endoprosthesis
PublicationThe paper presents research results of resistance to abrasive wear of titanium alloys: Ti6Al4V (commonly used) and Til3Nb13Zr (alloy of new generation) in association with polyethylene (UHMW-PE) predisposed for elements on pair of the knee endoprosthesis. The results were analysed from the point of possibility of an use of new generation titanium alloys as components of such implants. The tests of resistance to abrasive wear of...
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Numerical and experimental investigation of thermal convection near electric devices with vertical channels
PublicationThis paper presents the results of numerical and experimental investigation of thermal convection near heat emitting surfaces of an electric device. For the intensification of thermal convection, special vertical channels were formed near the heat emitting surfaces of the device. An experimental test has proved that there is an optimal length of the channels – thermal convection is the most intensive then. Air velocity vectors...
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MAPPING SOUTH BALTIC NEAR-SHORE BATHYMETRY USING SENTINEL-2 OBSERVATIONS
PublicationOne of the most promising new applications of remote observation satellite systems (RO) is the near-shore bathymetry estimation based on spaceborn multispectral imageries. In recent years, many experiments aiming to estimate bathymetry in optically shallow water with the use of remote optical observations have been presented. In this paper, optimal models of satellite derived bathymetry (SDB) for relatively turbid waters of the...
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Quantification of ultrafine airborne particulate matter generated by the wear of car brake materials
PublicationThe wear of car brakes is one of the main sources of airborne particulate matter in urban environments. Ultrafine wear particles are of special environmental interest since they can easily penetrate the human body through inhalation and cause various diseases. In the present study, the contribution of ultrafine particles to airborne particulate matter emitted from car brake materials was investigated under different friction conditions....
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Bulk linearized CMOS differential pair transconductor for continuous-time OTA-C filter design
PublicationIn this paper, the MOS differential pair driven simultaneously from gates and bulk terminals is described. An approximated analytical solution of the voltage to current transfer function has been found for the proposed circuit. Four possible combinations of gate and bulk connections of the input signal are presented. Basing on the configuration giving the best linearity, the operational transconductance amplifier (OTA) has been designed...
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The Influence of Cooperation on the Operation of an MPC Controller Pair in a Nuclear Power Plant Turbine Generator Set
PublicationThe paper discusses the problem of cooperation between multiple model predictive control (MPC) systems. This approach aims at improving the control quality in electrical energy generation and forms the next step in a series of publications by the authors focusing on the optimization and control of electric power systems. Cooperation and cooperative object concepts in relation to a multi MPC system are defined and a cooperative control...
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Pain assessment and management in children in the postoperative period: A review of the most commonly used postoperative pain assessment tools, new diagnostic methods and the latest guidelines for postoperative pain therapy in children
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Photogeneration of charge carriers pairs in pentacene layers.
PublicationAnalizowano mechanizmy odpowiedzialne za powstawanie par nośników ładunku w polikrystalicznych warstwach pentacenu.
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Psychiatric aspects of pain disorder and its management.
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