Filters
total: 3158
filtered: 1584
-
Catalog
- Publications 1584 available results
- Journals 100 available results
- Conferences 38 available results
- Publishing Houses 3 available results
- People 96 available results
- Inventions 9 available results
- Projects 65 available results
- Laboratories 2 available results
- Research Teams 11 available results
- Research Equipment 1 available results
- e-Learning Courses 392 available results
- Events 8 available results
- Open Research Data 849 available results
Chosen catalog filters
displaying 1000 best results Help
Search results for: gra
-
Deterministic and statistical size effect during shearing of granular layer
PublicationArtykuł omawia deterministyczny i statystyczny efekt skali w materiałach granulowanych podczas ścinania cienkiej warstwy piasku między dwoma bardzo szorstkimi ścianami. Obliczenia wykonano metodą elementów skończonych na bazie mikropolarnego prawa hipoplastycznego. Pokazano wyniki efektu skali przy zastosowaniu różnych metod redukujących ilość realizacji pól losowych dla początkowego wskaźnika porowatości..
-
Microwave Assisted Liquefaction with Crude Glycerol as a Potential Method of Brewer’s Spent Grain Utilization
Publication -
Analysis of the grain boundary conductivity for nanocrystalline doped ceria using the brick layer model.
PublicationW pracy przedstawiono wyniki badań elektrycznych i mikrostrukturalnych ceru domieszkowanego itrem. Gęste i nanokrystaliczne filmy przygotowane zostały z użyciem prekursorów polimerowych na szafirze. Konduktancja elektryczna była badana w funkcji temperatury syntezy, która jest skorelowana z wielkością ziaren. Otrzymano mniejszą konduktancję nanokrystalicznego filmu ceru w porównaniu z próbkami ceramicznymi.
-
O problemie przydziału częstotliwości, kontrastowym kolorowaniu grafów i częściowych k-drzewach
PublicationNiniejszy artykuł poświęcony jest złożoności obliczeniowej problemu przydziału częstotliwości. Zawiera dowód tego, że jest on NP-trudny nawet dla grafów interferencji, będących grafami dwudzielnymi, oraz wielomianowy algorytm rozwiązujący ten problem dla grafów interferencji, będących częściowymi k-drzewami.
-
Microwave assisted liquefaction with crude glycerol as a potential method of brewer's spent grain utylization
PublicationBrewer's spent grain was applied as a low-cost industrial type of lignocellulose biomass in a liquefaction and solvent: biomass ratio on the efficiency of the process, chemical structure and basic properties of obtained prepared polyols and soil residues shed light on the biomass degradation mechanism through application of microwaves and further reaction of degradation products with solvent particles.
-
Numerical simulations of sand behavior using DEM with 2 different descriptions of grain roughness
PublicationW rozdziale przedstawiono wyniki dyskretnych symulacji jednorodnego trójosiowego ściskania piasku przy zastosowaniu metody elementów dyskretnych. Obliczenia wykonano stosując 2 różne opisy szorstkości ziaren: kule z uwzględnieniem momentów kontaktu oraz grona kul. Obliczono energię sprężystą i dysypację plastyczną. Wyniki symulacji numerycznych porównano z wynikami doświadczalnymi.
-
Sustainable upcycling of brewers’ spent grain by thermo-mechanical treatment in twin-screw extruder
PublicationThermo-mechanical treatment of brewers’ spent grain (a by-product of beer manufacturing) was successfully performed via the extrusion process. The impact of temperature (from 30 to 180 °C), throughput (from 1 to 5 kg/h) and screw speed (from 75 to 375 rpm) on particle size, color, chemical structure, antioxidant activity and thermal stability of resulting material, as well as correlations between particular properties, were investigated....
-
Insights into the Thermo-Mechanical Treatment of Brewers’ Spent Grain as a Potential Filler for Polymer Composites
PublicationThis paper investigated the impact of twin-screw extrusion parameters on the properties of brewers’ spent grain. The chemical structure, antioxidant activity, particle size, and color properties, as well as the emission of volatile organic compounds during extrusion, were investigated. The main compounds detected in the air during modifications were terpenes and terpenoids, such as α-pinene, camphene, 3-carene, limonene, or terpinene....
-
Powder metallurgy of the porous Ti-13Nb-13Zr alloy of different powder grain size
PublicationThe objective of the present project was to determine the effects of powder granulation (fraction of grain size) for the Ti-13Nb-13Zr alloy, produced by powder metallurgy, on its porosity, grain cohesion, compressive strength, and Young`s modulus. Two powder fractions, 45–105 µm, and 106–250 µm were applied. The 50 mass pct of NH4HCO3 was added as a space holder. The specimens were in compaction stage uniaxially pressed at pressure...
-
Chitosan blends containing hyaluronic acid and collagen. Compatibility behaviour
Publication -
INFLUENCE OF THE INTERMOLECULAR INTERACTION ON PHYSICO-CHEMICAL PROPERTIES OF CHITOSAN/HYALURONIC ACID BLENDS
Publication -
THE INFLUENCE OF THE TYPE SOLVENT ON THE STRUCTURE OF CHITOSAN BLENDS WITH HYALURONIC ACID
Publication -
The physicochemical properties of 3D materials based on hyaluronic acid modified by tannic acid addition
Publication -
Nowy typ analizatora do oznaczania wodoru, metanu, etanu i propanu w zakresie dolnej granicy wybuchowości
Publication.
-
A new Toxoplasma gondii chimeric antigen containing fragments of SAG2, GRA1, and ROP1 proteins—impact of immunodominant sequences size on its diagnostic usefulness
PublicationThis study presents the first evaluation of new Toxoplasma gondii recombinant chimeric antigens containing three immunodominant regions of SAG2, GRA1, and one of two ROP1 fragments differing in length for the serodiagnosis of human toxoplasmosis. The recombinant chimeric antigens SAG2-GRA1-ROP1L (with large fragment of ROP1, 85-396 amino acid residues) and SAG2-GRA1-ROP1S (with a small fragment of ROP1, 85-250 amino acid residues)...
-
Impaired baroreflex sensitivity as a potential marker of cardiovascular risk in hypertension
Publication -
Turonian–Coniacian (Upper Cretaceous) of the Babadag Basin (North Dobrogea, Romania): integrated biostratigraphy and microfacies succession
Publication -
Burialscapes of Rab Island (North East Adriatic): The Role of Sepulchral Evidence in the Reconstruction of Roman and Late Antique Rural Settlement Pattern
PublicationOn the bases of archaeological and documentary data an overview of the burial evidence of Roman and late Antique date on the island of Rab (North East Adriatic, Croatia) is brought forth, spatially analysed and interpreted within the so-far defined rural settlement pattern. While aiding in the definition of burial practices and their diachronic changes, data derived from such evidence and interpreted from a social perspective,...
-
The site at the cape Zidine in Lopar in the context of coastal residential and commercial complexes of Rab Island
PublicationSince 2013, the “Archaeological topography of the island of Rab” project has approached the island’s archaeology holistically and interdisciplinary, tackling all periods and archaeological evidence present on the island. Nevertheless, mostly due to a large amount of new data, a significant segment of research is devoted to Roman residential and production complexes, located either in the island’s fields or along the coast. Thus,...
-
An Island of Connectedness: Intra-Insular and Inter-Regional Communications of Rab Island (North-East Adriatic, Kvarner Gulf), Croatia
PublicationDrawing from archaeological data on Prehistoric and Roman settlement patterns, and respective sepulchral features, just as on later historic and cartographic sources, in this contribution it will be shown how movement along with mobility influenced on and were an integral part of settlement dynamics on the island of Rab (NE Adriatic, Croatia). The employed approach sees the practice of movement as dependent on specific social...
-
Particle shape dependence in 2D granular media
PublicationParticle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter eta describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and non-convexity, eta is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape dependence in sheared...
-
Influence of temperature on the activity of anammox granular biomass.
PublicationThe aim of this study was to determine a short-term and long-term effect of temperature on the anammox rate and determination of temperature coefficients in the Arrhenius and Ratkowsky equations. The short-term effects of temperature on the anammox granular biomass were investigated in batch tests at ten different temperatures in the range of 10–55 °C. The maximum overall nitrogen removal rate of 1.3 gN gVSS−1·d−1 was observed...
-
A two-scale numerical approach to granular systems
PublicationW artykule zaprezentowano wyniki dwuskalowego numerycznego podejścia do materiałów granulowanych. Na poziomie mikro materiał był modelowany przy zastosowaniu metody elementów dyskretnych, natomiast na poziomie makro przy zastosowaniu metody elementów skończonych na bazie macierzy sztywności wyznaczonej na podstawie naprężeń i odkształceń na poziomie mikro.
-
Application of a cellular automata model to granular flow
PublicationPrzedstawiono wyniki modelowania przepływów granulowanych przy zastosowaniu automatu komórkowego. Obliczenia wykonano dla silosów ze wstawkami i ścianką szczelną. Przyjęto różne schematy propagacji ziaren.
-
Application of an improved cellular automaton for granular flow.
PublicationW artykule omówiono wyniki numeryczne z zastosowaniem ulepszonego aparatu komórkowego do przepływów silosowych materiałów granulowanych. W modelu uwzgledniono zderzenia cząstek i dysypację energii. Wyniki porównano z wynikami badań modelowych.
-
Micro-Abrasive Wear Testing of Surface Engineered Surgical Grade CoCrMo Alloy for Biotribological Applications
Publication -
DNA methylation analysis of benign and atypical meningiomas: correlation between RUNX3 methylation and WHO grade
Publication -
Fabrication and Characterization of Flexible Medical-Grade TPU Filament for Fused Deposition Modeling 3DP Technology
Publication -
Evaluation of open drone map toolkit for geodetic grade aerial drone mapping – case study
PublicationAn open source tool’s popularity has increased considerably, as well as micro aerial vehicles (MAV) technologies based on open source hardware. An open source software and hardware delivers a wide variety of applications and technology. The world’s most successful open source projects have their roots in the academy, and now its participation includes a wide variety of academic programs and research. Based on open source technology,...
-
Fabrication and Characterization of Flexible Medical-Grade TPU Filament for Fused Deposition Modeling 3DP Technology
PublicationThe possibility of using additive manufacturing (AM) in the medicine area has created new opportunities in health care. This has contributed to a sharp increase in demand for 3D printers, their systems and materials that are adapted to strict medical requirements. We described herein a medical-grade thermoplastic polyurethane (S-TPU) which was developed and then formed into a filament for Fused Deposition Modeling (FDM) 3D printers...
-
Functional Properties and Antioxidant Activity of Morus alba L. Leaves var. Zolwinska Wielkolistna (WML-P)—The Effect of Controlled Conditioning Process
Publication -
Reduction of dynamic effects during granular flow in silos
PublicationOmówiono kilka efektywnych sposobów redukcji nadmiernych dynamicznych efektów występujących w przepływie silosowym w silosach modelowych. Sposoby te mogą być wykorzystane w praktyce silosowej.
-
Wykonywanie praw podmiotów danych z Rozdziału III RODO przez dzieci. Granice samodzielności dzieci jako osób, których dane dotyczą
PublicationPrawa, o których mowa w rozdziale III RODO umożliwiają osobom fizycznym doraźną kontrolę nad celami i sposobem wykorzystywania danych osobowych przez administratorów. W świetle rozporządzenia szczególną pozycję mają dzieci, które kwalifikuje się jako podmioty danych podatne na zagrożenia związane z przetwarzaniem danych. Wraz rozwojem zdolności poznawczych dziecka, zmienia się jego rola w zarządzaniu swoimi danymi osobowych....
-
Smart Pen - new multimodal computer control tool for graphomotorical therapy
PublicationW sytuacji, gdy około 15% populacji uczniów wykazuje cechy dyslektyczne, koniecznością staje się wyposażenie szkół w efektywne narzędzia do diagnozy i terapii tego rodzaju zaburzeń. Dzięki wykorzystaniu tabletu i specjalnie skonstruowanego długopisu wyposażonego w czujniki nacisku uzyskano możliwość monitorowania wielu parametrów, które do tej pory były dla terapeutów całkowicie niedostępne (np. pomiar nacisku na podłoże czy ścisku...
-
Entropia w badaniach zaburzeń rytmu serca
PublicationArtykuł prezentuje zastosowanie ''Approximate Entropy'', będącej miarą stopnia złożoności szeregów czasowych, do analizy zmiennosci rytmu serca.
-
Entropy Measures of heart rate variability for short ECG datasets in patients with congestive heart failure
PublicationWe investigated the usefulness of entropy measures calculated for short ECG series in distinguishing healthy subjects from patients with congestive heart failure (CHF). Four entropy measures were tested: Approximate Entropy (ApEn), Sample Entropy (SampEn), Fuzzy Entropy (Fuzzy En) and Permutation Entropy (PE), each computed for ECG series of 1000, 500, 250 and 100 RR intervals. We found that with a reduction of the data set length...
-
Entropy measures of heart rate variability for short ECG datasets in patients with congestive heart failure
PublicationWe investigated the usefulness of entropy measures calculated for short ECG series in distinguishing healthy subjects from patients with congestive heart failure (CHF). Four entropy measures were tested: Approximate Entropy (ApEn), Sample Entropy (SampEn), Fuzzy Entropy (FuzzyEn) and Permutation Entropy (PE), each computed for ECG series of 1000, 500, 250 and 100 RR intervals. We found that with a reduction of the data set length...
-
Case study 1.2C: Road infrastructure cost in Poland, Annex to Deliverable D3, Marginal cost case studies for road and rail transport. GRACE. Funded by Sixth Framework Programme.
Publication -
Effects of Sterilization Methods on Different 3D Printable Materials for Templates of Physician-Modified Aortic Stent Grafts Used in Vascular Surgery—A Preliminary Study
Publication -
Immunocytochemical Study on Endothelial Integrity of Saphenous Vein Grafts Harvested by Minimally Invasive Surgery with the Use of Vascular Mayo Stripers. A Randomized Controlled Trial
Publication -
Design and synthesis of novel arylurea derivatives of aryloxy(1-phenylpropyl) alicyclic diamines with antimicrobial activity against multidrug-resistant Gram-positive bacteria
Publication -
Towards Temperature Dependent Coarse-grained Potential of Side-chain Interactions for Protein Folding Simulations
Publication -
UNRES server for physics-based coarse-grained simulations and prediction of protein structure, dynamics and thermodynamics
Publication -
A unified coarse-grained model of biological macromolecules based on mean-field multipole–multipole interactions
Publication -
Comparison between methods for determining the effective vertical yield stress of intermediate fine-grained soils
Publication -
Comparison between methods for determining the effective vertical yield stress of intermediate fine-grained soils
Publication -
Improvements and new functionalities of UNRES server for coarse-grained modeling of protein structure, dynamics, and interactions
PublicationIn this paper we report the improvements and extensions of the UNRES server (https://unres-server.chem.ug.edu.pl) for physics-based simulations with the coarse-grained UNRES model of polypeptide chains. The improvements include the replacement of the old code with the recently optimized one and adding the recent scale-consistent variant of the UNRES force field, which performs better in the modeling of proteins with the β and the...
-
Effect of Functionalization of Reduced Graphene Oxide Coatings with Nitrogen and Sulfur Groups on Their Anti-Corrosion Properties
PublicationElectrophoretic production of anticorrosion carbonaceous coatings on copper could be successfully performed by anodic oxidation of negatively charged graphene platelets suspended in an aqueous solution. The various platelets were synthesized by Hummer’s method followed by a hydrothermal reduction in the presence of NH4SCN which was expected to substitute some parts of graphene structure with nitrogen and sulfur groups. X-ray photoelectron...
-
Microwave absorption study on (Bi, Pb)-Sr-Ca-Cu-O granular superconductors
PublicationNadprzewodniki granulaste są bardzo ciekawymi materiałami dzięki temu, że zawierają dużą ilość złącz Josephsona. W pracy przedstawiono absorpcję mikrofalową w granulastych nadprzewodnikach (Bi, Pb)-Sr-Ca-Cu-O zawierających granule 2201, 2212 i 2223 umieszczone w matrycy dielektrycznej. Obserwowano dwustopniowe przejście do stanu nadprzewodzącego. Sygnał MMMA obserwowano poniżej temperatury T1.
-
Superconducting transition in granular Bi-Sr-Ca-Cu-O superconductors
PublicationW układzie(Bi,Pb)-Sr-Ca-Cu-O poprzez krystalizację w fazie stałej można wytworzyć materiały o bardzo różnych właściwościach elektrycznych i nadprzewodzących. W zależności od warunków krystalizacji, można wytworzyć nadprzewodnik o temperaturze krytycznej między 8 a 105 st. K lub materiał nie przechodzący do stanu nadprzewodzącego. Przejście do stanu nadprzewodzacego w materiałach granulastych ma charakter dwustopniowy. Zbadano wpływ...