Wyniki wyszukiwania dla: archives

• Research in Education and Learning Innovation Archives-REALIA

  Czasopisma

  ISSN: 2659-9031

• Archives of Disease in Childhood-Education and Practice Edition

  Czasopisma

  ISSN: 1743-0585 , eISSN: 1743-0593

• Archives of Disease in Childhood-Fetal and Neonatal Edition

  Czasopisma

  ISSN: 1359-2998 , eISSN: 1468-2052

• ARCHIV FUR TIERZUCHT-ARCHIVES OF ANIMAL BREEDING

  Czasopisma

  ISSN: 0003-9438 , eISSN: 2363-9822

• Archiwum Emigracji

  Czasopisma

  ISSN: 2084-3550 , eISSN: 2391-7911

• Polish Archives of Internal Medicine

  Czasopisma

  ISSN: 0032-3772 , eISSN: 1897-9483

• Archives of Budo Science of Martial Arts and Extreme Sports

  Czasopisma

  eISSN: 2300-8822

• Archives d'histoire doctrinale et littéraire du Moyen Age

  Czasopisma

  ISSN: 0373-5478

• ARCHIVES DES MALADIES DU COEUR ET DES VAISSEAUX

  Czasopisma

  ISSN: 1261-694X

• Turk Kardiyoloji Dernegi Arsivi-Archives of the Turkish Society of Cardiology

  Czasopisma

  ISSN: 1016-5169

• International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

  Czasopisma

  ISSN: 1682-1750 , eISSN: 2194-9034

• Archives des Maladies Professionnelles et de l Environnement

  Czasopisma

  ISSN: 1775-8785 , eISSN: 1778-4190

• Production Engineering Archives

  Czasopisma

  ISSN: 2353-5156 , eISSN: 2353-7779

• ARCHIVES OF GERONTOLOGY AND GERIATRICS

  Czasopisma

  ISSN: 0167-4943 , eISSN: 1872-6976

• Archives of Biological Sciences

  Czasopisma

  ISSN: 0354-4664 , eISSN: 1821-4339

• ARCHIVES OF ANIMAL NUTRITION

  Czasopisma

  ISSN: 1745-039X , eISSN: 1477-2817

• ARCHIVES OF MEDICAL RESEARCH

  Czasopisma

  ISSN: 0188-4409 , eISSN: 1873-5487

• ARCHIVES OF GYNECOLOGY AND OBSTETRICS

  Czasopisma

  ISSN: 0932-0067 , eISSN: 1432-0711

• Archiwa - Kancelarie - Zbiory

  Czasopisma

  ISSN: 1895-9075 , eISSN: 2544-5685

• Archiv für Rechts- und Sozialphilosophie / Archives for Philosophy of Law and Social Philosophy

  Czasopisma

  ISSN: 0001-2343 , eISSN: 2363-5614

• ABCD-Arquivos Brasileiros de Cirurgia Digestiva-Brazilian Archives of Digestive Surgery

  Czasopisma

  ISSN: 0102-6720 , eISSN: 2317-6326

• Editor's Farewell

  Publikacja

  • B. Kostek

  - Archives of Acoustics - Rok 2012

  By this occasion, I would like to mention the major milestones Archives of Acoustics experienced during the last years. For some years, we concentrated our efforts on introducing Archives of Acoustics to the ISI Web of Knowledge and the Journal Citation Report databases.We achieved this aim, and since 2007 Archive of Acoustics has been referenced in the Journal Citation Report. Accordingly, our next object was to obtain the Impact...

  Pełny tekst do pobrania w portalu

• Semi-Markov Approach to the Shipping Safety Modelling

  Publikacja

  • S. Guze
  • L. Smolarek

  - Archives of Transport - Rok 2012

  Pełny tekst do pobrania w serwisie zewnętrznym

• Performance of cryogenic oxygen production unit with exhaust gas bleed for sewage sludge gasification and different oxygen purities

  Publikacja

  • M. Kaszuba
  • P. Ziółkowski
  • D. Mikielewicz

  - Archives of Thermodynamics - Rok 2023

  The paper presents a thermodynamic analysis of the integration of a cryogenic air separation unit into a negative CO2 emission gas power plant. The power cycle utilizes sewage sludge as fuel so this system fits into the innovative idea of bioenergy with carbon capture and storage. A cryogenic air separation unit integrated with the power plant was simulated in professional plant engineering and thermodynamic process analysis software....

  Pełny tekst do pobrania w portalu

• Non-uniqueness of fracture parameter choice in simulations of concrete cracking at mesoscale level

  Publikacja

  • B. Kondys
  • J. Bobiński
  • I. Marzec

  - ARCHIVES OF MECHANICS - Rok 2023

  In the paper a non-uniqueness of fracture parameter choice in simulations of cracking process in plain concrete specimens at mesoscale level under monotonic static loading is analysed. The Finite Element Method is used, where cracks are defined in a discrete way using interface cohesive elements with nonlinear material law including softening. The concrete mesostructure (such as: cement matrix, air voids, aggregates, and Interfacial...

  Pełny tekst do pobrania w portalu

• Assessment of the impact of jet impingement technique on the energy efficiency of air-cooled BIPV/T roof tile

  Publikacja

  • J. Wajs
  • J. Łukasik

  - Archives of Thermodynamics - Rok 2024

  The paper concerns a numerical analysis of cooling of the hybrid photovoltaic (PV) modules dedicated to Building-Integrated Photovoltaic/Thermal (BIPV/T) systems. Attention was focused on the photovoltaic roof tiles, using a jet impingement technique, in which the intensification of heat transfer is ensured by streams of air hitting the heat exchange partition. A series of numerical simulations were carried out to assess an influence...

  Pełny tekst do pobrania w portalu

• New empirical correlations for the viscosity of selected organic phase change materials

  Publikacja

  • J. Cieśliński
  • M. Fabrykiewicz
  • T. Wiśniewski
  • M. Kubiś
  • S. Smolen
  • A. Eicke
  • K. Dutkowski
  • M. Głuszek-Czarnecka

  - Archives of Thermodynamics - Rok 2023

  Although there are many methods and instruments for measuring viscosity, it is still difficult to determine a reliable value of the dynamic viscosity of complex chemicals such as paraffins and fatty acids. This is due to the complex and heterogeneous structure of these compounds in the case of commercial products. On the other hand, the measuring instrument should be selected very carefully, including its measuring principle and...

  Pełny tekst do pobrania w portalu

• Quality Evaluation of Speech Transmission via Two-way BPL-PLC Voice Communication System in an Underground Mine

  Publikacja

  • P. Falkowski-Gilski
  • G. Debita

  - Archives of Acoustics - Rok 2023

  In order to design a stable and reliable voice communication system, it is essential to know how many resources are necessary for conveying quality content. These parameters may include objective quality of service (QoS) metrics, such as: available bandwidth, bit error rate (BER), delay, latency as well as subjective quality of experience (QoE) related to user expectations. QoE is expressed as clarity of speech and the ability...

  Pełny tekst do pobrania w portalu

• Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions

  Publikacja

  • J. Schmidt
  • I. Kochańska
  • A. Schmidt

  - Archives of Acoustics - Rok 2024

  The underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the direct sequence spread spectrum (DSSS) technique, which consists in binary phase shift keying (BPSK) according to a pseudo-random spreading sequence. This paper describes the DSSS...

  Pełny tekst do pobrania w portalu

• Optimisation of turbine shaft heating process under steam turbine run-up conditions

  Publikacja

  • K. Dominiczak
  • M. Drosińska-Komor
  • R. Rządkowski
  • J. Głuch

  - Archives of Thermodynamics - Rok 2020

  An important operational task for thermal turbines during run-up and run-down is to keep the stresses in the structural elements at a right level. This applies not only to their instantaneous values, but also to the impact of them on the engine lifetime. The turbine shaft is a particularly important element. The distribution of stresses depends on geometric characteristics of the shaft and its specific locations. This means a groove manufactured...

  Pełny tekst do pobrania w portalu

• Performance of isotropic constitutive laws in simulating failure mechanisms in scaled RC beams

  Publikacja

  • I. Marzec
  • J. Bobiński

  - ARCHIVES OF MECHANICS - Rok 2020

  Results of numerical calculations of reinforced concrete (RC) beams are presented. Based on experimental results on longitudinally reinforced specimens of different sizes and shapes are investigated. Four different continuum constitutive laws with isotropic softening are used: one defined within continuum damage mechanics, an elasto-plastic with the Rankine criterion in tension and the Drucker-Prager criterion in compression, a...

  Pełny tekst do pobrania w portalu

• Shallow Water Experiment of OFDM Underwater Acoustic Communications

  Publikacja

  • I. Kochańska
  • J. Schmidt
  • J. Marszal

  - Archives of Acoustics - Rok 2020

  The large variability of communication properties of underwater acoustic channels, and especially the strongly varying instantaneous conditions in shallow waters, is a challenge for the designers of underwater acoustic communication (UAC) systems. The use of phase modulated signals does not allow reliable data transmission through such a tough communication channel. However, orthogonal frequency-division multiplexing (OFDM), being...

  Pełny tekst do pobrania w portalu

• Impact of Boundary Conditions on Acoustic Excitation of EntropyPerturbations in a Bounded Volume of Newtonian Gas

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2019

  Excitation of the entropy mode in the field of intense sound, that is, acoustic heating, is theoreticallyconsidered in this work. The dynamic equation for an excess density which specifies the entropy mode,has been obtained by means of the method of projections. It takes the form of the diffusion equation withan acoustic driving force which is quadratically nonlinear in the leading order. The diffusion coefficient isproportional...

  Pełny tekst do pobrania w portalu

• On the Consumption of Multimedia Content Using Mobile Devices: a Year to Year User Case Study

  Publikacja

  • P. Falkowski-Gilski

  - Archives of Acoustics - Rok 2020

  In the early days, consumption of multimedia content related with audio signals was only possible in a stationary manner. The music player was located at home, with a necessary physical drive. An alternative way for an individual was to attend a live performance at a concert hall or host a private concert at home. To sum up, audio-visual effects were only reserved for a narrow group of recipients. Today, thanks to portable players,...

  Pełny tekst do pobrania w portalu

• Review of methods for assessing traffic conditions on basic motorway and expressway sections

  Publikacja

  • A. Romanowska
  • K. Jamroz
  • P. Olszewski

  - Archives of Transport - Rok 2019

  Motorways and expressways are the core of each country’s road system. Road planning, design and management requires tools to ensure that roads have the right geometry, traffic layout and equipment. These include methods for capacity estimation and assessing traffic conditions. Because the paper focusses on the basic segments of motorways and expressways (sections located between interchanges and outside of their influence), its...

  Pełny tekst do pobrania w portalu

• Nonlinear Influence of Sound on the Vibrational Energy of Molecules in a Relaxing Gas

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2012

  Dynamics of a weakly nonlinear and weakly dispersive flow of a gas where molecular vibrational relaxation takes place is studied. Variations in the vibrational energy in the field of intense sound is considered. These variations are caused by a nonlinear transfer of the acoustic energy into energy of vibrational degrees of freedom in a relaxing gas. The final dynamic equation which describes this is instantaneous, it includes a...

  Pełny tekst do pobrania w portalu

• Optimal boiling temperature for ORC installation

  Publikacja

  • J. Mikielewicz
  • D. Mikielewicz

  - Archives of Thermodynamics - Rok 2012

  W pracy przedstawiono oryinalne kryterium wyznaczania optymalnej temperatury odparowania czynnika w obiegu ORC w postaci równań analitycznych. Pokazano przykład obliczeniowy na bazie R134a, wody i etanolu.

  Pełny tekst do pobrania w portalu

• Theoretical studies of nonlinear generation efficiency in a bubble layer

  Publikacja

  • A. Baranowska

  - Archives of Acoustics - Rok 2012

  Celem pracy jest teoretyczna analiza propagacji fal o dużym natężeniu w warstwie z pęcherzykami. Przedstawiono model matematyczny zjawiska w tym omówiono problem wyznaczania prędkości fazowej, współczynnika tłumienia i częstotliwości rezonansowej pęcherzyków. Badano zmiany amplitud pierwszej i drugiej harmonicznej ciśnienia fali odbitej i bieżącej w funkcji grubości warstwy oraz względnej koncentracji pęcherzyków. Rozważano pęcherzyki...

  Pełny tekst do pobrania w portalu

• Heating caused by a non periodic ultrasound. Theory and calculations on pulse and stationary sources.

  Publikacja

  • A. Perelomova

  - Archives of Acoustics - Rok 2003

  Przedstawiono teorię ewolucji ogrzewania na skutek przejścia fali akustycznej każdego typu. Przedyskutowano obliczenia na podstawie nowych wzorów dla fali impulsowej i uderzeniowej. Wzory zgadzają się z klasycznymi w wypadku fal okresowych.

  Pełny tekst do pobrania w portalu

• Formation of bubbles from a single nucleation site.

  Publikacja

  • J. Cieśliński
  • J. Polewski
  • J. A. Szymczyk

  - Archives of Thermodynamics - Rok 2002

  Przedstawiono wyniki systematycznych badań eksperymentalnych wrzenia wody destylowanej i metanolu z pojedynczego, sztucznego centrum nukleacji. Jako centra nukleacji służyły otwory wywiercone na czołowej powierzchni miedzianego pręta. Średnice otworów wynosiły: 0.25 mm, 0.60 mm oraz 1.0 mm. Do pomiaru częstotliwości odrywania się pęcherzyków zastosowano układ laser diodowy-fotodioda. Sygnał z fotodiody był rejestrowany za...

  Pełny tekst do pobrania w portalu

• Digital waveguide models of the panpipes

  Publikacja

  • A. Czyżewski
  • J. Jaroszuk
  • B. Kostek

  - Archives of Acoustics - Rok 2002

  W artykule przedstawiono główne cechy syntezy falowodowej. Omówiono cechy instrumentu fletni Pana. Przedyskutowano cechy zaproponowanych dwóch modeli fletni Pana różniących się złożonością obliczeniową. Pokazano szczegóły implementacyjne tych modeli, a także uzyskane wyniki symulacji dźwięków w modelach. Dokonano porównania dźwięków rzeczywistych i uzyskanych w wyniku syntezy falowodowej.

  Pełny tekst do pobrania w portalu

• The effect of temperature difference on heat transport in solar cells

  Publikacja

  • E. Klugmann-Radziemska

  - Archives of Thermodynamics - Rok 2003

  W pracy omówiono wpływ wzrostu temperatury i mechanizm transportu ciepła na drodze przewodzenia w układach hybrydowych PV/T. Wyznaczono współczynniki przewodzenia krystalicznego krzemu typu n i p oraz gęstość strumienia ciepła w zakresie temperatur od 0 do 100 st. C.

• APPLICATION OF VIBRATION SIGNALS IN RAILWAY TRACK DIAGNOSTICS USING A MOBILE RAILWAY PLATFORM

  Publikacja

  • R. Licow
  • F. Tomaszewski

  - Archives of Transport - Rok 2024

  The article presents a comprehensive method for using vibration signals to diagnose railway tracks. The primary objective is to gather detailed information on track conditions through a passive experiment. This involves using mobile diagnostic tools and techniques to assess railway infrastructure. The article elaborates on the range of diagnostic activities conducted in accordance with detailed railway regulations and highlights...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Modelling of heat transfer during flow condensation of natural refrigerants under conditions of increased saturation pressure

  Publikacja

  • S. Głuch
  • D. Mikielewicz

  - Archives of Thermodynamics - Rok 2024

  The paper presents a modified in-house model for calculating heat transfer coefficients during flow condensation, which can be applied to a variety of working fluids, but natural refrigerants in particular, at full range thermodynamic parameters with a particular focus on increased saturation pressure. The modified model is based on a strong physical basis, namely the hypothesis of analogy between the heat transfer coefficient...

  Pełny tekst do pobrania w portalu

• Non-ribosomal peptides produced by Planktothrix agardhii from Siemianówka Dam Reservoir SDR (northeast Poland)

  Publikacja

  • M. Grabowska
  • J. Kobos
  • A. Toruńska-Sitarz
  • H. Mazur-Marzec

  - ARCHIVES OF MICROBIOLOGY - Rok 2014

  Pełny tekst do pobrania w serwisie zewnętrznym

• Evolutionary Sets of Safe Ship Trajectories: the Method's Development and Selected Reaserch Results

  Publikacja

  • R. Szłapczyński
  • J. Szłapczyńska

  - Archives of Transport - Rok 2011

  The Evolutionary Sets of Safe Ship Trajectories is a method solving ship encounter situations. The method combines evolutionary approach to planning ship trajectory with some of the assumption of game theory. For given positions and motion parameters the method finds a near optimal set of safe trajectories of all ships involved in an encounter. This paper presents framework of the method and its development. Additionally, selected...

  Pełny tekst do pobrania w portalu

• Creating Acoustic Maps Employing Supercomputing Cluster

  Publikacja

  • A. Czyżewski
  • J. Kotus
  • M. Szczodrak

  - Archives of Acoustics - Rok 2011

  The implemented online urban noise pollution monitoring system is presented with regard to its conceptual assumptions and technical realization. A concept of the noise source parameters dynamic assessment is introduced. The idea of noise modeling, based on noise emission characteristics and emission simulations, was developer and practically utilized in the system. Furthermore, the working system architecture and the data acquisition...

  Pełny tekst do pobrania w portalu

• Acoustic heating produced in the boundary layer

  Publikacja

  • A. Perelomova
  • W. Pelc-Garska

  - Archives of Acoustics - Rok 2012

  : Instantaneous acoustic heating of a viscous fluid flow in a boundary layer is the subject of investigation. The governing equation of acoustic heating is derived by means of a special linear combination of conservation equations in the differential form, which reduces all acoustic terms in the linear part of the final equation but preserves terms belonging to the thermal mode. The procedure of decomposition is valid in a weakly...

  Pełny tekst do pobrania w portalu

• Study of preference for surround microphone techniques, used in the recording of choir and instrumental ensemble

  Publikacja

  • B. Kostek
  • A. Sitek

  - Archives of Acoustics - Rok 2011

  The aim of this paper is to describe the process of choosing the best surround microphone technique for recording of choir with an instrumental ensemble. First, examples of multichannel microphone techniques including those used in the recording are described. Then, the assumptions and details of music recording in Radio Gdansk Studio are provided as well as the process of mixing of the multichannel recording. The extensive subjective...

  Pełny tekst do pobrania w portalu

• Selected problems of determining the course of railway routes by use of GPS network solution

  Publikacja

  • W. Koc
  • C. Specht

  - Archives of Transport - Rok 2011

  W 2009 roku Politechnika Gdańska rozpoczęła prace nad wykorzystaniem ciągłych pomiarów pozycji systemów geodezji satelitarnej dla wyznaczania przebiegu trasy kolejowej z wykorzystaniem fazowych metod GPS opartych o serwis NAVGEO polskiej Aktywnej Sieci Geodezyjnej ASG-EUPOS. W celu eliminacji błędów przypadkowych wpływających na dokładność wyznaczenia trasy kolejowej w następnym roku zespół przeprowadził dwie kampanie pomiarowe...

  Pełny tekst do pobrania w portalu