Wyniki wyszukiwania dla: uniaxial tensile test

• Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on epoxy based coating using 2-wire probe sample 1

  Dane Badawcze

  open access

  • G. Lentka
  • J. Bordziłowski
  • J. Hoja

  - seria: HIADAC testing in cooperation with Road and Bridge Research Institute

  The dataset presents impedance spectrum of  epoxy based coating (code-name B2_B3) sample 1. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174.  The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...

• Testing HIADAC high impedance analyzer in cooperation with Road and Bridge Research Institute on epoxy based coating using 2-wire probe sample 3

  Dane Badawcze

  open access

  • G. Lentka
  • J. Bordziłowski
  • J. Hoja

  - seria: HIADAC testing in cooperation with Road and Bridge Research Institute

  The dataset presents impedance spectrum of  epoxy based coating (code-name EPCS1) sample 3. This object was used to test high-impedance analyzer for diagnostic of anticorossion coatings (HIADAC) realized in the frame of Eureka project E!3174.  The impedance spectrum frequency range (0.1 Hz – 100 kHz) was selected in order to test the whole measureement...

• Spirometry measurement model - the diagnostic purpose support

  Publikacja

  • J. Szklanny
  • W. Słomiński
  • K. Kuziemski

  - Biocybernetics and Biomedical Engineering - Rok 2008

  the paper presents a new model of respiratory mechanism based on the spirometry measurements. the spirometry test assesses the efficiency of the lung ventilation. the respiratory system functioning is based on the ventilation mechanism. thus the quality of the lung depends on the quality of lung ventilation. modelling of the respiratory system supports a diagnostic process. the model parameter estimates are obtained on the basis...

• Generalised heart rate statistics reveal neurally mediated homeostasis transients

  Publikacja

  • D. Makowiec
  • B. Graff
  • W. Miklaszewski
  • D. Wejer
  • A. Kaczkowska
  • S. Budrejko
  • Z. R. Struzik

  - EPL-EUROPHYS LETT - Rok 2015

  Distributions of accelerations and decelerations, obtained from increments of heart rate recorded during a head-up tilt table (HUTT) test provide short-term characterization of the complex cardiovascular response to a rapid controlled dysregulation of homeostasis. A generalised statistic is proposed for evaluating the neural reflexes responsible for restoring the homeostatic dynamics. An evaluation of the effects on heart rate...

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• Determination of Failure Causes of a Steam Turbine Casing

  Publikacja

  • J. Ćwiek
  • J. Łabanowski
  • S. Topolska
  • M. Sozańska

  - Solid State Phenomena - Rok 2012

  The paper presents results of research and failure analysis undertaken to determine failure causes of a steam turbine casing. After 130,000 hours of service the crack in a outer shell of the turbine casing was found. The inner shell of the casing was made of cast steel grade G21CrMoV5-7, and the outer shell of grade G20CrMo4-5. Following research were performed in order to determine causes of the casing failure: chemical analysis;...

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• Shaft friction from the DMT and direct shear interface tests

  Publikacja

  • K. Mikina
  • J. Konkol
  • L. Bałachowski

  - Rok 2021

  The article presents preliminary attempt to create tri-linear transfer curves for describing pile behaviour under axial loading. Transfer curves would use the parameter measured in dilatometer test, particularly a constrained modulus MDMT. The proposed method is based on concrete rough and smooth interface tests performed in a direct shear apparatus. Based on the obtained mobilization curves, relationships were created between...

• A method of earth fault loop impedance measurement without unwanted tripping of RCDs

  Publikacja

  • R. Roskosz
  • E. Musiał
  • S. Czapp

  - Rok 2018

  In low-voltage networks, earth fault loop impedance (EFLI) measurement is the basis for assessing the effectiveness of automatic disconnection of supply. Such a measurement is performed during initial and periodical verification, especially in a TN low-voltage network. Nowadays, due to widespread application of residual current devices (RCDs), such test is difficult in many circuits because RCDs operate during the test. In this...

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• Numerical simulation of the influence of the selected factors on the performance of a concrete road barrier H2/W5/B

  Publikacja

  • Ł. Pachocki
  • K. Wilde

  - MATEC Web of Conferences - Rok 2018

  This paper discuss the influence of selected factors on the performance of a concrete road barrier H2/W5/B. Modelling techniques of a concrete road safety system were briefly discussed. Comparison to the full scale crash test results has been shown. The concrete road safety barrier has been investigated for evaluation of the overall damage after collision under various initial conditions. The failure assessment criterion has been...

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• Effect of polymer fibres reinforcement on selected properties of asphalt mixtures

  Publikacja

  • P. Jaskuła
  • M. Stienss
  • C. Szydłowski

  - Procedia Engineering - Rok 2017

  The paper presents selected results of the research program concerning fibre reinforced asphalt concrete. Aramid-polyalphaolefin fibres was used in this study. Selected properties responsible for low temperature cracking and resistance to permanent deformation are presented in this paper. Low temperature cracking susceptibility was evaluated with the results obtained from bending test of rectangular beams with constant rate of...

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• Multi-functional monodispersed SiO2-TiO2 core-shell nanostructure and TEOS in the consolidation of archaeological lime mortars surfaces

  Publikacja

  • A. Fahmy
  • A. Gołąbiewska
  • W. Wojnicz
  • A. Stanisławska
  • J. Kowalski
  • J. Łuczak
  • A. Zaleska-Medynska
  • S. Bella Domínguez-
  • J. Martínez-lópez
  • E. Molina-piernas

  - Journal of Building Engineering - Rok 2023

  Archaeological traditional lime mortars are susceptible to many environmental conditions such as the impact of water (rain, humidity, groundwater, etc.), variation of temperatures' degrees, wind and/or pollution. Accordingly, this research aims to provide newly assessed multifunctional Nano-coating for the purpose of archaeological lime mortar protection. For this, the study combined physicochemical and mechanical characterizations...

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• Effect of free water on the quasi‑static compression behavior of partially‑saturated concrete with a fully coupled DEM/CFD approach.

  Publikacja

  • M. Krzaczek
  • J. Tejchman
  • M. Nitka

  - GRANULAR MATTER - Rok 2024

  The work aims to numerically investigate the quasi-static response of partially fluid-saturated concrete under two-dimensional uniaxial compression at the mesoscale. We investigated how the impact of free pore fluid content (water and gas) affected the quasi-static strength of concrete. The totally and partially fluid-saturated concrete behavior was simulated using an improved pore-scale hydro-mechanical model based on DEM/CFD....

• Andrzej Chybicki dr inż.

  Osoby

  Katedra Systemów Geoinformatycznych

  Z wykształcenia informatyk, absolwent Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej, doktor nauk technicznych w dziedzinie informatyka specjalizujący się w przetwarzaniau danych przestrzennych w rozproszonych systemach informatycznych. Ukierunkowany na wykorzystywanie osiągnięć i wiedzy zakresu prowadzonych badań w przemyśle. Współpracował z szeregiem podmiotów przemysłu informatycznego, geodezyjnego...

• Cold recycled mixtures for binder courses - laboratory evaluation of mechanical properties

  Publikacja

  • B. Dołżycki
  • M. Jaczewski
  • C. Szydłowski

  - Rok 2022

  Cold recycled mixtures composed with cement and bituminous emulsion are nowadays commonly used material for base layer. Typical pavement with cold recycled mixtures usually consists of two asphalt courses (wearing and binding course) constructed over cold recycled base. Therefore the next step in cold recycling is possibility of design of binding courses with recycled materials, but with potential to obtain high quality mixtures...

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• AN ENERGY APPROACH TO THE FATIGUE LIFE OF SHIP PROPULSION SYSTEMS

  Publikacja

  • Z. Korczewski
  • J. Rudnicki

  - Rok 2015

  The conducted research investigations aimed to carry out an identification of the constructional materials fatigue state of the ship propulsions’ rotational mechanical units for diagnostic purposes. The fatigue cracks of the elements transmitting mechanical energy streams from the propulsion engines to the ship propellers or to the generators of the ship’s electric power station stand for a primary reason for the secondary, usually...

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• Standard and modified falling mass impact tests on preplaced aggregatefibrous concrete and slurry infiltrated fibrous concrete

  Publikacja

  • K. Ramakrishnan
  • S. Depak
  • K. Hariharan
  • S. R. Abid
  • G. Murali
  • D. Cecchin
  • R. Fediuk
  • Y. Mugahed Amran
  • H. Abdelgader
  • J. M. Khatibi

  - CONSTRUCTION AND BUILDING MATERIALS - Rok 2021

  Although several studies have been conducted to evaluate the impact response of concrete using theAmerican Concrete Institute (ACI) 544-2R falling mass impact test, the variations in test results are themain drawback of this testing method. This study aims to reduce the variations in experimental impacttest results by introducing two simple test setup modifications; (1) using coarse or fine aggregate bed-ding as an alternative...

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• Measurements of displacement and acceleration of the railway bridge at km 333-254 of the Vilnius - Klaipeda railway line

  Publikacja

  • A. Nadolny
  • Ł. Filar
  • J. Kałuża
  • M. Wazowski
  • M. Miśkiewicz
  • J. Chróścielewski
  • K. Wilde
  • Ł. Pyrzowski
  • P. Tysiąc
  • B. Sobczyk
  • K. Makowska-Jarosik

  - Rok 2020

  The purpose of this work is to perform a report of static and dynamic test realized on the bridge at km 333-254 of the Vilnius - Klaipeda railway line over the Salantas River in Kūlupėnų.

• The experimental research on the axially compressed CFFT columns

  Publikacja

  • P. Korzeniowski
  • T. Ulenberg

  - Rok 2017

  The research objectives is to test the behaviour of the axially compressed glass fiber reinforced polymer tubes CFFT (concrete-filled FRP tube) withe the R-C core.

• Vibro piles performance prediction using result of CPT

  Publikacja

  • P. Więcławski

  - Studia Geotechnica et Mechanica - Rok 2021

  Vibro piles belong to the group of full displacement piles with an expanded base, characterised by a very high load capacity, especially in non-cohesive soils. The problem is to adopt a reliable method for the determination of full load–settlement (Q–s) curve. A frequent difficulty is the determination of the load capacity limit based on the static load test because the course of the load–settlement curve is of a linear nature....

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• The use of a two-phase Monte Carlo material model to reflect the dispersion of asphalt concrete fracture parameters

  Publikacja

  • C. Szydłowski
  • Ł. Smakosz
  • M. Stienss
  • J. Górski

  - THEORETICAL AND APPLIED FRACTURE MECHANICS - Rok 2022

  The work covers comprehensive laboratory tests of semi-circular bending (SCB) of asphalt concrete samples. The results of two test series, including four and 32 SCB specimens, indicate a substantial scatter of force–deflection (F-d) histories. The numerical analysis is aimed to reflect the maximum breaking load and fracture energy of the samples, pointing out their random character. The original simulation-based fictitious Monte...

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• Distributed Representations Based on Geometric Algebra: the Continuous Model

  Publikacja

  • A. Patyk-Łońska
  • M. Czachor
  • D. Aerts

  - Informatica - Rok 2011

  Authors revise the concept of a distributed representation of data as well as two previously developed models: Holographic Reduced Representation (HRR) and Binary Spatter Codes (BSC). A Geometric Analogue (GAc - ''c'' stands for continuous as opposed to its discrete version) of HRR is introduced - it employs role-filler binding based on geometric products. Atomic objects are real-valued vectors in n-dimensional Euclidean space...

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• Kształtowanie wartości wskaźników wspomagania finan-sowego przez ponadprzeciętnie rentowne MSP w okresie dobrej i złej koniunktury gospodarczej

  Publikacja

  • P. Figura

  - Finanse, Rynki Finansowe, Ubezpieczenia - Rok 2016

  W artykule porównano kształtowanie wartości wskaźników z obszaru wspomagania finansowego przez ponadprzeciętnie rentowne MSP w okresie dobrej i złej koniunktury gospodarczej. Celem przeprowadzonych badań było ponadto zaproponowanie przedziałów wartości rekomendowanych dla wskaźników z obszaru wspomagania finansowego, z osobna dla okresu dobrej jak i złej koniunktury gospodarczej. W trakcie przepro-wadzonych badań uwzględniono...

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• Kształtowanie wartości wskaźników płynności finansowej przez ponadprzeciętnie rentowne MSP w okresie dobrej i złej koniunktury gospodarczej

  Publikacja

  • P. Figura

  - Przedsiębiorstwo & Finanse - Rok 2016

  : W artykule porównano kształtowanie wartości wskaźników z obszaru płynności finansowej przez ponadprzeciętnie rentowne MSP w okresie dobrej i złej koniunktury gospodarczej. Celem przeprowadzonych badań było ponadto zaproponowanie przedziałów wartości rekomendowanych dla wskaźników z obszaru płynności finansowej z osobna dla okresu dobrej, jak i złej koniunktury gospodarczej. W trakcie przeprowadzonych badań uwzględniono 67 317...

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• Wave propagation in damage assessment of ground anchors

  Publikacja

  • B. Zima
  • M. Rucka

  - Journal of Physics : Conference Series - Rok 2015

  The inspection possibilities of ground anchors are limited to destructive test such as pull-out test. Guided wave propagation gives an opportunity to develop an inspection system dedicated to determine the condition of inspected element without violation of their integrity. In this paper the experimental study on wave propagation in laboratory models of ground anchors are presented. Experiments were conducted for different bonding...

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• Multidimensional Scaling Analysis Applied to Music Mood Recognition

  Publikacja

  • B. Kostek
  • M. Piotrowska

  - Rok 2013

  The paper presents two experiments aimed at categorizing mood associated with music. Two parts of a listening test were designed and carried out with a group of students, most of whom where users of online social music services. The initial experiment was designed to evaluate the extent to which a given label describes the mood of the particular music excerpt. The second subjective test was conducted to collect the similarity data...

• A measurement system for children endurance tests

  Publikacja

  • L. Rafiński
  • M. Łuszczyk

  - Poznan University of Technology Academic Journals. Electrical Engineering - Rok 2012

  There are a lot of ethical problems concerning the use of invasive methods for the measurement of a child's body response to physical exercise and physical training. The alternative is are non-invasive methods like ergospirometry or NIRS. The article presents a measurement system dedicated for children endurance tests, composed of a few non-invasive measurement modules, including a temperature measurement module. Temperature is...

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• Effect of the inclination angle of the condenser on the heat transfer coefficient value – experimental study

  Publikacja

  • H. Charun
  • M. Czapp
  • S. Czapp
  • M. Orłowska

  - Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika - Rok 2016

  When considering problem of the condensation of the refrigerant in a flow inside channel, one needs to pay attention to the shape of its cross-section, the hydraulic diameter, the channel length as well as the orientation of the channel axis in space (horizontal, vertical, inclined). This paper presents an experimental study concerning the effect of the inclination angle of the condenser with a single coil pipe on the heat transfer...

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• Computer analysis of multiple-choice examination documents

  Publikacja

  • Ł. Karpowicz
  • W. Malina
  • M. Smiatacz

  - Rok 2004

  Opisany system AATE wyposażony jest w edytor testów, za pomocą którego egzaminator przygotowuje test egzaminacyjny. Utworzony test ze swoimi parametrami jest pamiętany w bazie danych i następnie może być wydrukowany. Po przeprowadzeniu egzaminu wypełnione formularze za pomocą skanera z podajnikiem wprowadza się do komputera. W komputerze system analizuje formularze i odczytane odpowiedzi porównuje się z wzorcami przechowywanymi...

• CONCRETE MIX DESIGN USING ABRAMS AND BOLOMEY METHODS

  Publikacja

  • S. Abdelgader
  • M. Kurpińska
  • J. Khatib
  • H. Abdelgader

  - BAU Journal - Science and Technology - Rok 2022

  One way to reduce the consumption of cement is to optimize its use. Many known methods of concrete design, based on the Abrams law and the Bolomey method. Therefore, the authors chose those methods for analysis. The concrete composition with the assumed strength class, calculated by any method differs significantly. This applies especially to the cement content, as its content in the composition of concrete varies from 20 to 50%....

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• Experimental and numerical studies on the mechanical response of a piezoelectric nanocomposite-based functionally graded materials

  Publikacja

  • M. Malikan
  • M. Rucka

  - Rok 2024

  This work presents an experimental study of piezoelectric structures reinforced by graphene platelets, based on the concept of the functionally graded materials (FGMs). The assumed model is a rectangular beam/plate and the composition is due to the Halpin-Tsai rule. The model is also simulated in the Abaqus software which is the first time that such a structure has been modelled in an FEM package. In addition, a mathematical model...

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• Experimental and numerical evaluation of mechanical behaviour of composite structural insulated panels

  Publikacja

  • Ł. Smakosz
  • I. Kreja

  - Rok 2014

  Composite structural insulated panels (CSIPs) are novel prefabricated elements for structural applications. Panels under consideration are made from glass-fibre reinforced magnesia cement boards as facesheets and expanded polystyrene foam (EPS) as a core. Quasi-static full-scale and model bending tests under monotonic loading were performed to recognize mechanical properties of CSIPs in flexure. In addition, tensile, compressive,...

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• Formation and Growth of the Crack in Bonded Joints Under Mode I Fracture: Substrate Deflection at Crack Vicinity

  Publikacja

  • M. Budzik
  • J. Jumel
  • M. Shanahan

  - JOURNAL OF ADHESION - Rok 2011

  Adhesive bonding is now commonly used in aircraft, cars, boats, etc. In these applications, thin panels are often bonded. In such thin structures, heterogeneous mechanical loading along the bondline edge (or potential crack front), is likely to arise due to 3D structural effects. The crack front and its vicinity is a special region, in that it is where structural properties of the adherend material meet those of the adhesive (discontinuity)....

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• Structural design and sensitivity analysis of semi-rigid pavement of a motorway

  Publikacja

  • J. Judycki
  • P. Jaskuła

  - Rok 2011

  This paper presents application of mechanistic-empirical methods in design of semi-rigid pavement for a section of a motorway in Poland. The stage construction was assumed. Three fatigue criteria were applied in the design. For asphalt fatigue cracking and subgrade soil the criteria from the Asphalt Institute (USA) were applied. For fatigue cracking of cement stabilized bases the Dempsey (USA) and De Beer (South Africa) criteria...

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• Sulfate‐reducing bacteria‐assisted hydrogen‐induced stress cracking of 2205 duplex stainless steels

  Publikacja

  • J. Łabanowski
  • T. Rzychoń
  • W. Simka
  • J. Michalska

  - MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION - Rok 2019

  The paper presents the results of a laboratory investigation of the microbiologically assisted hydrogen‐induced stress cracking (HISC) of 2,205 duplex stainless steel (DSS). The testing of susceptibility toward HISC was performed with two different methods. Precharged in sulfate‐reducing bacteria (SRB), inoculated medium samples were subjected to slow strain‐rate testing in artificial seawater. In situ constant load tests were...

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• Modification of Ground Tire Rubber—Promising Approach for Development of Green Composites

  Publikacja

  • Ł. Zedler
  • M. Przybysz-Romatowska
  • J. T. Haponiuk
  • S. Wang
  • K. Formela

  - Journal of Composites Science - Rok 2020

  Ground tire rubber (GTR) was mechano-chemically modified using a road bitumen 100/150 and two types of organic peroxides: di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB) and dicumyl peroxide (DCP). The impact of used additives on reactive sintering efficiency and physico-mechanical properties of modified GTR was investigated using oscillating disc rheometer measurements, followed by tensile tests and swelling behavior studies....

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• Thermal and Mechanical Properties of Microporous Polyurethanes Modified with Reduced Graphene Oxide

  Publikacja

  • M. Strankowski
  • D. Włodarczyk
  • Ł. Piszczyk
  • J. Strankowska

  - International Journal of Polymer Science - Rok 2016

  Microporous polyurethanes (MPU) were modified by adding 0.25%–1.25 wt% of reduced graphene oxide (RGO). The materials were prepared without solvent via in situ polymerization. From a technological point of view, it is very important to obtain functional materials by using reacting compounds only. The thermal characteristics of obtained MPU were investigated using TGA, DSC, and DMA techniques. In comparison to nonmodified microporous...

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• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K07

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K06

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K04

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - PARAFFIN OIL. Specim. set K08

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: PARAFFIN OIL. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig:...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K02

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K05

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K03

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). No lubrication (DRY). Specim. set K01

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DRY. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig: TPZ-1...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - PARAFFIN OIL. Specim. set K09

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: PARAFFIN OIL. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test rig:...

• Optical microsc. images of wear marks on ball (JPG). Reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%). Lubricant - DISTILLED WATER. Specim. set K06

  Dane Badawcze

  open access

  • J. Łubiński
  • K. Druet

  - seria: Wear in reciprocating siding friction tests. Ball-on-flat contact. Sintered alumina ceramics (98%).

  Optical microscope images of wear zone on the 5mm diam. ceramic ball used in tests as the fixed specimen.Friction and wear tests in ball-on-flat contact. Both specimens made of sintered alumina ceramics (98%) - self-mated contact.Linear reciprocating motion.Lubrication: DISTILLED WATER. Sliding velocity (peak): 0.1 m/s. Load (normal force): 5N. Test...

• Procognitive activity of nitric oxide inhibitors and donors in animal models

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  • P. Cieślik
  • L. Kalinowski
  • J. M. Wierońska

  - NITRIC OXIDE-BIOLOGY AND CHEMISTRY - Rok 2022

  Nitric oxide is a small gaseous molecule that plays important roles in the majority of biological functions. Impairments of NO-related pathways contribute to the majority of neurological disorders, such as Alzheimer’s disease (AD), and mental disorders, such as schizophrenia. Cognitive decline is one of the most serious impairments accompanying both AD and schizophrenia. In the present study, the activities of NO donors, slow (spermine...

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• A new anisotropic bending model for nonlinear shells: Comparison with existing models and isogeometric finite element implementation

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  • E. J. Savitha
  • R. Sauer

  - INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES - Rok 2023

  A new nonlinear hyperelastic bending model for shells formulated directly in surface form is presented, and compared to four existing prominent bending models. Through an essential set of elementary nonlinear bending test cases, the membrane and bending stresses of each model are examined analytically. Only the proposed bending model passes all the test cases, while the other bending models either fail or only pass the test cases for...

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• Algoritmically improved microwave radar monitors breathing more acurrate than sensorized belt

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  • A. Czyżewski
  • B. Kostek
  • A. Kurowski
  • K. Narkiewicz
  • B. Graff
  • P. Odya
  • T. Śmiałkowski
  • A. Sroczyński

  - Scientific Reports - Rok 2022

  This paper describes a novel way to measure, process, analyze, and compare respiratory signals acquired by two types of devices: a wearable sensorized belt and a microwave radar-based sensor. Both devices provide breathing rate readouts. First, the background research is presented. Then, the underlying principles and working parameters of the microwave radar-based sensor, a contactless device for monitoring breathing, are described....

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• Influence of finishing colour on the efficiency of automated production line for wooden doors

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  • Z. Kwidziński
  • M. Chodnicki
  • Ł. Sankiewicz
  • B. Knitowski
  • T. Rogoziński

  - Rok 2023

  Porta KMI Poland S.A. company has implemented a fully automated intelligent technological line TechnoPORTA for customized mass-production of technical door leaves. Each door leaf is provided with a unique QR code. It allows the line modules to individually adjust the machining parameters to the currently processed element according to the IT controlling system. Before en-tering the TechnoPorta line, the door leaves are not sorted,...

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• Reliability and Validity of Optoelectronic Method for Biophotonical Measurements

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  • K. Karpienko
  • M. Wróbel
  • R. Urniaż

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  Reliability and validity of measurements is of utmost importance when assessing measuring capability of instruments developed for research. In order to perform an experiment which is legitimate, used instruments must be both reliable and valid. Reliability estimates the degree of precision of measurement, the extent to which a measurement is internally consistent. Validity is the usefulness of an instrument to perform accurate...