Search results for: OPEN POROUS STRUCTURES

• Effect of rotating magnetic field on ferromagnetic structures used in hyperthermia

  Publication

  • M. Konopacki
  • M. Jędrzejczak-Silicka
  • K. Szymańska
  • E. Mijowska
  • R. Rakoczy

  - Journal of Magnetism and Magnetic Materials - Year 2021

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• Concrete-filled FRP tubular members in marine and bridge structures

  Publication

  • M. Abramski

  - Year 2020

  Concrete core of the concrete-filled tubes (CFTs) with circular cross-section is in the case of an axial compression subjected to a spatial state of compressive stresses. This state leads to enhancement in the concrete strength. The enhancement is utilized in Eurocode 4 design procedures for CFSTs (i.e. CFTs with tube made of steel). The structural design of CFFTs (i.e. CFTs with tube made of Fibre Reinforced Polymer - FRP) is...

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• Increasing the lifetime of engineering structures through the use of composite laggings

  Publication

  • E. Mieloszyk
  • A. Milewska
  • M. Abramski

  - Year 2020

  The use of composite laggings prevents concrete (chemical and biological) corrosion. Columns coated with composite or reinforced composite are more resistant to negative environmental impact on concrete or steel. The mechanical properties of the reinforced casing also cause that these types of columns are more resistant to lateral forces. The applied casing limits carbonization of concrete and cyclical freezing and thawing with...

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• Frequency-Based Regularization for Improved Reliability Optimization of Antenna Structures

  Publication

  • S. Kozieł
  • A. Pietrenko-Dąbrowska
  • M. Al-hasan

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Year 2021

  The paper proposes a modified formulation of antenna parameter tuning problem. The main ingredient of the presented approach is a frequency-based regularization. It allows for smoothening the functional landscape of the assumed cost function, defined to encode the prescribed design specifications. The regularization is implemented as a special penalty term complementing the primary objective and enforcing the alignment of the antenna...

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• Set of Experience and Decisional DNA: Experience-Based Knowledge Structures

  Publication

  • C. Sanin
  • E. Szczerbicki

  - Year 2020

  This chapter presents a description of Set of Experience Knowledge Structure (SOEKS) and Decisional DNA (DDNA), argumentation for a knowledge representation, composition, configuration and metrics. SOEKS is a combination of filtered and amalgamated information obtained from formal decision events. It facilitates effective explicit representation of decisional experience taken from different technologies. SOEKS comprises variables,...

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• CFGFRPT Piles with a Circular Cross-Section and their Application in Offshore Structures

  Publication

  • E. Mieloszyk
  • M. Abramski
  • A. Milewska

  - Polish Maritime Research - Year 2019

  The possibilities of using concrete piles in a polymer composite reinforced with glass fibres in offshore facilities were shown. Laboratory tests of CFGFRPT type piles compressed axially and in eccentric compression for the analysis of CFGFRPT piles were used. Methods of analysis of dynamic systems for mathematical modelling of the displacement of the hammer in the pile driving process were applied. The possibilities of combining...

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• Numerical analysis of the carpentry joints applied in the traditional wooden structures

  Publication

  • A. Pestka
  • P. Kłosowski

  - Year 2016

  The paper concerns the numerical analysis of the carpentry joints made from spruce wood. The material parameters of the wood have been calculated on the basis of nine independent material constants (an orthotropic material). The contact zone between the individual elements of the connection has been determined using Contact Tables in the MSC.Marc software. Five types of carpentry joints have been analyzed. The main aim of the research...

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• Syntheses and Structures of Transition Metal Complexes with Phosphanylphosphinidene Chalcogenide Ligands

  Publication

  • A. Ordyszewska
  • N. Szynkiewicz
  • Ł. Ponikiewski
  • M. Scheer
  • J. Pikies
  • R. Grubba

  - INORGANIC CHEMISTRY - Year 2019

  The reactivity of the phosphanylphosphinidene complex [(DippN)2W(Cl)(η2-P-PtBu2)]− (1) toward chalcogens (Ch = Se, S) was studied. Reactions of stoichiometric amounts of 1 with chalcogens in DME yielded monomeric tungsten complexes with phosphanylphosphinidene chalcogenide ligands of the formula tBu2P−P−Ch (Ch = Se (in 2) and S (in 5)), which can be regarded as products of the addition of a chalcogen atom to a P=W bond in starting...

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• Computational Bar Size Optimization of Single Layer Dome Structures Considering Axial Stress and Shape Disturbance

  Publication

  • A. Manguri
  • N. Saeed
  • F. Kazemi
  • N. Asgarkhani
  • M. Szczepański
  • R. Jankowski

  - Year 2024

  A computational method is proposed in this paper to minimize the material usage in the construction of modern spatial frame structures by prestressing a minimal number of members. The computational optimization is conducted in two steps. Firstly, a numerical model of a single-layer dome structure is used to minimize the cross-sectional area through several iterations. Different assumed ratios (r) ranging from 0.95 to 0.75 are multiplied...

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• Cost-Efficient EM-Driven Size Reduction of Antenna Structures by Multi-Fidelity Simulation Models

  Publication

  • A. Pietrenko-Dąbrowska
  • S. Kozieł

  - Electronics - Year 2021

  Design of antenna systems for emerging application areas such as the Internet of Things (IoT), fifth generation wireless communications (5G), or remote sensing, is a challenging endeavor. In addition to meeting stringent performance specifications concerning electrical and field properties, the structure has to maintain small physical dimensions. The latter normally requires searching for trade-off solutions because miniaturization...

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• Towards Changes of Macro-Economic Structures in Middle Eastern Countries. Empirical Evidence for 1970–2018

  Publication

  • E. Lechman
  • R. Ślosarski

  - Year 2020

  Middle East countries share a wide bundle of specific structural economic features and one of the latest is a high dependency of these economies on fossil fuels, which is quantitatively demonstrated through the share of oil and gas revenues in total export, but also in gross domestic product composition. This high economic dependency on natural resources on one hand has recently generated a material wealth of Middle Eastern countries...

• Intrinsic effects of AM4113, a putative neutral CB1 receptor selective antagonist, on open-field behaviors in rats

  Publication

  • T. U. C. Jarbe
  • B. Lemay
  • T. Olszewska
  • V. K. Vemuri
  • J. A. T. Wood
  • A. Makriyannis

  - PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR - Year 2008

  W pracy przedstawiono wyniki testów otartego pola na zachowanie szczurów po iniekcji zwierzętom WIN55,21-2 (WIN; 3 mg/kg) agonisty receptora kanabinoidowego CB1R, bądź AM4113 (0.3−5.6 mg/kg) przypuszczalnie neutralnego antagonisty receptora kanabinoidowego CB1R oraz mieszaniny obu związków. W badaniach pod uwagę brano następujące zachowania zwierząt; ilość kwadratów, którą szczury przechodziły na czterech nogach, częstotliwość...

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• Intra-operative gallbladder scoring predicts conversion of laparoscopic to open cholecystectomy: a WSES prospective collaborative study

  Publication

  • M. Sugrue
  • F. Coccolini
  • M. Bucholc
  • A. Johnston

  - World Journal of Emergency Surgery - Year 2019

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• Method to solve the non-linear systems of equations for steady gradually varied flow in open channel network.

  Publication

  • R. Szymkiewicz
  • A. Szymkiewicz

  - Year 2004

  W artykule omówiono rozwiązanie systemu równań nieliniowych opisujacych przepływ ustalony wolnozmienny w sieci kanałów otwartych. Niewiadomymi są glębokości w poszczególnych przekrojach oraz natężenia przepływów w poszczególnych gałęziach systemu. Układ musi być rozwiązywany iteracyjnie. Klasyczne metody Picarda i Newtona mogą okazać się nieskuteczne ze względu na oscylacje rozwiązania w kolejnych iteracjach i związany z tym brak...

• Transformation of the countryside into an open-air museum as a way to rescue its spatial layot and to improve the quality of life

  Publication

  • D. Wojtowicz-Jankowska

  - Year 2011

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

  Publication

  • R. Szymkiewicz

  - TASK Quarterly - Year 2007

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

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• Mercury intrusion porosimetry (MIP) results of cement pastes containing Bi2O3/Gd2O3 and silica-coated Bi2O3/Gd2O3 structures

  Open Research Data

  open access

  • P. Sikora
  • J. Strzałkowski

  Mercury intrusion porosimetry (MIP) data - curves of cement pastes containing Bi2O3/Gd2O3 and silica-coated Bi2O3/Gd2O3 structures

• Isothermal calorimetry data for cement pastes containing pristine and silica-coated bismuth oxide (Bi2O3) and gadolinium oxide (Gd2O3) structures

  Open Research Data

  open access

  • P. Sikora

  Excel file containing raw calorimetric data determined up to 168 h (Tam Air 3 8-channel isothermal calorimeter) of cement pastes containing variable amount of Bi2O3, Gd2O3, Bi2O3-SiO2 and Gd2O3-SiO2 structures. Sample designation in the Excel file is in line with sample designation in the manuscript associated with dataset.

• Cost-Efficient Surrogate Modeling of High-Frequency Structures Using Nested Kriging with Automated Adjustment of Model Domain Lateral Dimensions

  Publication

  • A. Pietrenko-Dąbrowska
  • S. Kozieł

  - AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS - Year 2020

  Surrogate models are becoming popular tools of choice in mitigating issues related to the excessive cost of electromagnetic (EM)-driven design of high-frequency structures. Among available techniques, approximation modeling is by far the most popular due to its versatility. In particular, the surrogates are exclusively based on the sampled simulation data with no need to involve engineering insight or problem-specific knowledge....

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• Journal of Open Archaeology Data

  Journals

  ISSN: 2049-1565

• Russian Open Medical Journal

  Journals

  ISSN: 2304-3415

• Open Journal of Communication and Software

  Journals

  ISSN: 2374-5096

• European Journal of Radiology Open

  Journals

  ISSN: 2352-0477

• International Journal of Surgery Open

  Journals

  ISSN: 2405-8572

• BMJ Open Respiratory Research

  Journals

  ISSN: 2052-4439

• Open Access Journal of Contraception

  Journals

  ISSN: 1179-1527

• Open Cardiovascular Medicine Journal

  Journals

  ISSN: 1874-1924

• Journal of Open Research Software

  Journals

  eISSN: 2049-9647

• Open Review of Educational Research

  Journals

  ISSN: 2326-5507

• Open Access Emergency Medicine

  Journals

  ISSN: 1179-1500

• Royal Society Open Science

  Journals

  ISSN: 2054-5703

• Open Forum Infectious Diseases

  Journals

  ISSN: 2328-8957

• Clinical Nutrition Open Science

  Journals

  ISSN: 2667-2685

• Open Sports Sciences Journal

  Journals

  eISSN: 1875-399X

• Open Petroleum Engineering Journal

  Journals

  eISSN: 1874-8341

• Open Materials Science Journal

  Journals

  eISSN: 1874-088X

• IEEE Open Journal of Nanotechnology

  Journals

  eISSN: 2644-1292

• Oxford Open Materials Science

  Journals

  eISSN: 2633-6979

• Open Chemical Engineering Journal

  Journals

  eISSN: 1874-1231

• European Urology Open Science

  Journals

  ISSN: 2666-1691 , eISSN: 2666-1683

• Open Stem Cell Journal

  Journals

  eISSN: 1876-8938

• Open Civil Engineering Journal

  Journals

  eISSN: 1874-1495

• SpringerBriefs in Open and Distance Education

  Journals

  ISSN: 2509-4335 , eISSN: 2509-4343

• Open Cybernetics and Systemics Journal

  Journals

  eISSN: 1874-110X

• Open Public Health Journal

  Journals

  eISSN: 1874-9445

• European Journal of Psychology Open

  Journals

  ISSN: 2673-8627

• Vilnius University Open Series

  Journals

  eISSN: 2669-0535

• Open Biomedical Engineering Journal

  Journals

  eISSN: 1874-1207

• Open Medicinal Chemistry Journal

  Journals

  eISSN: 1874-1045

• Journal of Open Psychology Data

  Journals

  eISSN: 2050-9863