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Search results for: CEMENT KOSTNY
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Novel calix[4]resorcinarenes with side azobenzo-15-crown-5 residues
PublicationZsyntezowano nowe kaliks[4]rezorcareny z dwoma lub czteroma resztami azobenzo-15-korony-5 w dowolnym pierścieniu. Związki te otrzymano w reakcji kondensacji rezorcynolu z odpowiednimi aldehydami (acetalami).
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Ammonia in Fly Ashes from Flue Gas Denitrification Process and its Impact on the Properties of Cement Composites
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Significance of cement-stabilised soil grain size distribution in determining the relationship between strength and resilient modulus
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Dual-Setting Bone Cement Based On Magnesium Phosphate Modified with Glycol Methacrylate Designed for Biomedical Applications
PublicationMagnesium phosphate cement (MPC) is a suitable alternative for the currently used calcium phosphates, owing to beneficial properties like favorable resorption rate, fast hardening, and higher compressive strength. However, due to insufficient mechanical properties and high brittleness, further improvement is still expected. In this paper, we reported the preparation of a novel type of dual-setting cement based on MPC with poly(2-hydroxyethyl...
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Cement-based composites with waste expanded perlite - Structure, mechanical properties and durability in chloride and sulphate environments
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Cement Lime Concrete
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COMPARISON OF INFINITE ELEMENT MODELS
PublicationThe main objective of this paper is to show the comparison of two models of infinite ab- sorbing layer with increasing damping in numerical investigations of elastic wave prop- agation in unbounded structures. This has been achieved by the Authors by a careful in- vestigation of two different engineering structures characterised by gradually increasing geometrical and mathematical description complexities. The analysis included...
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RECENT PROGRESS IN HORMONE RESEARCH
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Recent Results in Cancer Research
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Recent Innovations in Chemical Engineering
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Recent Patents on Materials Science
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Recent Patents on Mechanical Engineering
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Recent Patents on Computer Science
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Reviews on Recent Clinical Trials
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RIVISTA DEL NUOVO CIMENTO
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Badanie wytrzymałości na ściskanie gruntowych materiałów kompozytowych torf - popiół lotny - wapno
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Mosty tymczasowe typu BAILEY - MS 22-80 w świetle badań in SITU
PublicationW pracy przedstawiono i omówiono zakres badań, wybrane modele obliczeniowe, wyniki analiz teoretycznych i badań odbiorowych (próbnych obciążeń o rozszerzonym zakresie), oraz spostrzeżenia dotyczące zachowania się konstrukcji na przykładzie kilku badanych obiektów mostów tymczasowych typu bailey - MS 22-80.
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Reply to “Comment on ‘Crystal Structure Prediction by Global Optimization as a Tool for Evaluating Potentials: Role of the Dipole Moment Correction Term in Successful Predictions'” by B. P. van Eijck and J. Kroon
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Antibacterial evaluation of bioactive modifiers of bone cements: antibiotics, nanometals and chitosan
PublicationModern biomaterials in addition to their basic tasks, can serve as carriers of active substance. The release of a bioactive particles allows to locally fight infection or its prevent it. Bone cements additionally to their basic applications in orthopedic surgery can also serve to deliver locally active substances. Currently, only antibiotics are routinely used as modifiers for bone cements. Bioactive bone cements constitute...
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Electron-beam irradiation in TEM of hard-segment homopolymers and polyurethanes with different hard-segment content.
PublicationZbadano odporność na niszczenie radiacyjne w transmisyjnym mikroskopie elektronowym homopolimeru segmentów sztywnych i poliuretanów z różną zawartością segmentów sztywnych. Dokonano rejestracji morfologii tych polimerów w TEM w trakcie obserwacji w jasnym polu oraz selektywnej dyfrakcji elektronowej. Analizowano tkże te polimery w mikroskopie polaryzacyjnym przed i po obserwacjach w TEM. Potwierdzono doniesienia literatutowe o...
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Koszty pracy jako jeden z czynników wpływających na wybór elastycznych form zatrudnienia-uwagi ogólne
PublicationW pracy wskazano w sposób ogólny czynniki i elementy wpływające na wysokość kosztów pracy. Coraz cześciej rosnące koszty pracy, zarówno koszty osobowe, jak i rzeczowe obciążenia finansowe związane z zorganizowaniem i wyposażeniem stanowisk pracy, ale następnie utrzymaniem pracobiorcy zmuszają pracodawców do szukania oszczędności m. in. poprzez wybór stosownej formy zatrudnienia.
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Ultrasonic Evaluation of Cement-Based Building Materials Modified Using Marble Powder Sourced from Industrial Wastes
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Functional Bi2O3/Gd2O3 Silica-Coated Structures for Improvement of Early Age and Radiation Shielding Performance of Cement Pastes
PublicationThis study presents a new approach towards the production of sol-gel silica-coated Bi2O3/Gd2O3 cement additives towards the improvement of early mechanical performance and radiation attenuation. Two types of silica coatings, which varied in synthesis method and morphology, were used to coat Bi2O3/Gd2O3 structures and evaluated...
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Antimicrobial Activity of Al2O3, CuO, Fe3O4, and ZnO Nanoparticles in Scope of Their Further Application in Cement-Based Building Materials
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Sposób otrzymywania implantu metalicznego pokrytego powłoką oraz implant metaliczny pokryty powłoką
InventionsPowłoka na implanty metaliczne, składająca się z cementu kostnego z dodatkiem nanometali jako substancji bakteriobójczych. Wprowadzenie wszczepu do określonego organu wiąże się z koniecznością przeprowadzenia zabiegu operacyjnego, w wyniku którego uszkodzona zostaje określona ilość tkanek miękkich, co skutkować może wprowadzeniem drobnoustrojów, które w późniejszym okresie powodują rozwój...
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GPU-accelerated finite element method
PublicationIn this paper the results of the acceleration of computations involved in analysing electromagnetic problems by means of the finite element method (FEM), obtained with graphics processors (GPU), are presented. A 4.7-fold acceleration was achieved thanks to the massive parallelization of the most time-consuming steps of FEM, namely finite-element matrix-generation and the solution of a sparse system of linear equations with the...
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Recent advances in gaseous imaging photomultipliers
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Wideband Macromodels in Finite Element Method
PublicationThis letter proposes a novel projection technique for accelerating Finite Element Method simulations. The algorithm is based on the Second-order Arnoldi Method for Passive Order Reduction (SAPOR). It involves generation of two projection bases and thanks to this it is applicable to the systems of equations, which contain the quadratic frequency-dependence in the input term, that arise when projection is applied locally in the selected...
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Grinding of cemented carbides with planetary kinematics
PublicationW pracy przeprowadzono wyniki badań szlifowania z wykorzystaniem nowoczesnej szlifierki planetarnej DLM 505 HS. Zastosowano jednolite narzędzie wykonane z ziarna diamentowego D107. W artykule wyprowadzono podstawowe równania ruchu w układzie planetarnym. Przedstawiono również wartości parametrów chropowatości, ubytku materiałowego i płasko-równoległości po szlifowaniu przedmiotów wykonanych z węglików spiekanych - HF10, D10x8 mm.
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Element sensor based on microplasma generators
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Recent developments in disulfide bond formation
PublicationThis review summarizes the recent developments of disulfide bond formation with variety of reagents. The scope and limitation of the presented methods is discussed. The syntheses of unsymmetrical disulfides are highlighted in order to present the most versatile achievements.
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Finite element matrix generation on a GPU
PublicationThis paper presents an efficient technique for fast generation of sparse systems of linear equations arising in computational electromagnetics in a finite element method using higher order elements. The proposed approach employs a graphics processing unit (GPU) for both numerical integration and matrix assembly. The performance results obtained on a test platform consisting of a Fermi GPU (1x Tesla C2075) and a CPU (2x twelve-core...
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Recent developmentsinthesynthesisand biological activityofacridine/acridoneanalogues
PublicationMany people in the world struggle with cancer or bacterial, parasitic, viral, Alzheimer's and other diseases. Therefore, many scientists seek new, more effective, more selective and less toxic drugs. Acridine/acridone derivatives constitute a class of compounds with a broad spectrum of biological activity and are of great interest to scientists. Todate, many acridine/acridone analogues have been obtained,which, inter alia, exhibit...
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Remont budynku mareografu w Ustce.
PublicationArtykuł dotyczy opisu procesu rewitalizacji budynku mareografu w Ustce.
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Comment on ''Quantum Entropy and Special Relativity''
PublicationKomentarz na temat publikacji Peresa, Scudo i Terno.
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Wzmacnianie gruntu in situ metodą wgłębnego mieszania i wykorzystanie cemento gruntu
PublicationOpisano zasady wykonywania mieszania wgłębnego gruntu przy zastosowaniu suchych spoiw oraz zaczynu cementowego. Pierwszy sposób, określany jako metoda mieszania na sucho, zastosowano w Polsce m.in. do posadowienia nasypów drogowych w ramach budowy przeprawy mostowej przez Regalicę. Drugi sposób, określany jako mieszanie na mokro, zastosowano m.in. do wzmocnienia gruntów pod Trasą Zieloną w Lublinie oraz do wykonania uszczelnień...
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Biomechanical testing of bioactive bone cements – a comparison of the impact of modifiers: antibiotics and nanometals
PublicationApart from its bone filler and fracture stabilizing function, bone cement can be used as a carrier of bioactive substances, and such modified bone cement can protect the implant against microorganisms, treat local infections and combat bacteria introduced during the surgical procedure. In this paper, the effects of modifying antibiotics and nanosilver on the biomechanical properties of bone cement were examined. The following tests...
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Durability and mechanical properties of seashell partially-replaced cement, Journal of Building Engineering 2020-09-03 | Journal article |
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Predicting Compressive Strength of Cement-Stabilized Rammed Earth Based on SEM Images Using Computer Vision and Deep Learning
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Nanosilver-loaded PMMA bone cement doped with different bioactive glasses – evaluation of cytocompatibility, antibacterial activity, and mechanical properties
PublicationNanosilver-loaded PMMA bone cement (BC-AgNp) is a novel cement developed as a replacement for conventional cements. Despite favorable properties and antibacterial activity, BC-AgNp still lacks biodegradability and bioactivity. Hence, we investigated the doping with bioactive glasses (BGs) to create a new bioactive BC characterized by time-varying porosity and gradual release of nanosilver. The BC Cemex was used as the base material...
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Boosting Portland cement-free composite performance via alkali-activation and reinforcement with pre-treated functionalised wheat straw
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Quantitative determination of processed waste expanded perlite performance as a supplementary cementitious material in low emission blended cement composites
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The Effect of Surface Modification of Ti13Zr13Nb Alloy on Adhesion of Antibiotic and Nanosilver-Loaded Bone Cement Coatings Dedicated for Application as Spacers
PublicationSpacers, in terms of instruments used in revision surgery for the local treatment of postoperative infection, are usually made of metal rod covered by antibiotic-loaded bone cement. One of the main limitations of this temporary implant is the debonding effect of metal–bone cement interface, leading to aseptic loosening. Material selection, as well as surface treatment, should be evaluated in order to minimize the risk of fraction...
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KOSZTY TRANSPORTU CZYNNIKIEM WPŁYWAJĄCYM NA KONKURENCYJNOŚĆ EKSPORTU NA PERSPEKTYWICZNE RYNKI PAŃSTW TRZECICH – PRZYKŁAD POLSKI I NIEMIEC
PublicationArtykuł dotyczy tematyki konkurencyjności eksportu oraz czynników ją kształtujących. Zawiera porównanie polskiej i niemieckiej gospodarki m.in. ze względu na udział eksportu w PKB. Wskazano perspektywiczne rynki dla polskich oraz niemieckich eksporterów. Oceniono możliwości transportu towarów do krajów zlokalizowanych na innych kontynentach. W ostatniej części zaprezentowano wyniki badania w zakresie porównania kosztów transportu...
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Gostyn 2021 - video data I - pedestrian, bicycles, vehicles
Open Research DataGostyn 2021 - video data - pedestrian, bicycles, vehicles
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Implant system for treatment of the orbital floor defects of blowout fractures in the maxillofacial region using polypropylene yarn and bioactive bone cement
PublicationFractures in the craniofacial region are a serious problem in terms of treatment. The most reasonable solution is the use of individual implants dedicated to a specific patient. The aim of this study was to develop the implant system specifically for treatment of the orbital floor defects of blowout fractures of maxillofacial region, using polypropylene yarn and bone cement. Three types of bone cement were used to fix the polypropylene...
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Macromodeling techniques for accelerated finite element analysis
PublicationThis paper deals with the Model Order Reduction applied locally in the Finite Element Method (FEM) analysis. Due to the reduction process, blocks of FEM system matrices associated with selected subregions of the computational domain are projected onto the subspaces spanned by the vectors of suited orthogonal projection basis. In effect, large and sparse FEM matrices are replaced with small and dense ones, called macromodels. This...
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Recent steel structures in Poland - the selected projects
PublicationThe paper presents selected examples of recently completed steel structures in Poland. These are roofs over sport stadiums, construction of public buildings and bridges. Described examples do not exhaust the acquis in the field of steel constructions in Poland. The authors, however, may hope that the presented con-structions represents current achievements in Poland in the field of steel structures.
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Recent Developments in Methods of Analysis for Fluoride Determination
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Client-server Approach in the Navigation System for the Blind
PublicationThe article presents the client‐server approach in the navigation system for the blind ‐ “Voice Maps”. The authors were among the main creators of the prototype and currently the commercialization phase is being finished. In the implemented prototype only exemplary, limited spatial data were used, therefore they could be stored and analysed (for path-finding process) in the mobile device’s memory without any difficulties. The...