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Search results for: Dissolution rate
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Forecasting of currency exchange rates using artificial neural networks
PublicationW rozdziale tym autor przedstawił wyniki swoich badań nad wykorzystaniem sztucznych sieci neuronowych do prognozowania kursu walut (na przykładzie pary walutowej PLN-USD).Głównym celem badań było porównanie skuteczności przewidywania kursu złotówki w latach 1997 - 2005 przy pomocy różnych rodzajów sieci neuronowych.
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Knowledge and Attitudes of Future Healthcare Professionals Toward Rare Diseases
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Problem pro rata parte na gruncie prawa karnego
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The up-to-date role of biologics for the treatment of chronic lymphocytic leukemia
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Efficient bounds on quantum-communication rates via their reduced variants
PublicationWe investigate one-way communication scenarios where Bob operating on his component can transfer some subsystem to the environment. We define reduced versions of quantum-communication rates and, further, prove upper bounds on a one-way quantum secret key, distillable entanglement, and quantum-channel capacity by means of their reduced versions. It is shown that in some cases they drastically improve their estimation.
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Band misplacement: a rare complication of laparoscopic adjustable gastric banding
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Antiferromagnetic Order in the Rare-Earth Halide Perovskites CsEuBr3 and CsEuCl3
PublicationBulk CsEuBr3 and CsEuCl3 are experimentally shown to be magnetic semiconductors that order antiferromagnetically at Néel temperatures of 2.0 K and 1.0 K, respectively. Given that nanoparticles and thin films of CsEuCl3 have been reported to order ferromagnetically at a similar temperature, our observation of antiferromagnetic ordering in CsEuBr3 and CsEuCl3 expands the possible applications of halide perovskites to now include...
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Comparative analysis of different numerical models of a steel radial gate
PublicationHydrotechnical structures are important components in water management system and general flooding safety. Their reliability should be ensured since potential damage might lead to catastrophic consequences. Weir gates are considered to be highly vulnerable elements of each hydro power plant, with regard to its dynamic resistance. The aim of the paper is to compare different numerical models and their influence on the results of...
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Relationship between heart rate variability, blood pressure and arterial wall properties during air and oxygen breathing in healthy subjects
PublicationPrevious studies reported that normobaric hyperoxia influences heart rate, arterial pressure, cardiac output and systemic vascular resistance, but the mechanisms underlying these changes are still not fully understood. Several factors are considered including degeneration of endothelium-derived nitric oxide by reactive oxygen species, the impact of oxygen-free radicals on tissues and alterations of autonomic nervous system function....
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Corrosion fatigue crack propagation rate characteristics for weldable ship and offshore steels with regard to the influence of loading frequency and seawater temperature
PublicationAfter Vosikovsky (1975), the corrosion fatigue crack growth rate (CFCGR) characteristics have been divided into three regions. The region-III rates are very close to mechanical fatigue crack growth rates. CFCGR formulae, including the long-crack length effect (in region I only), the loading frequency effect (in region II only), and the saltwater temperature effect, have been proposed. It has been assumed that CFCGR is proportional...
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Comparison of Wavelet Transform Modulus Maxima and Multifractal Detrended Fluctuation Analysis of Heart Rate in Patients with Systolic Dysfunction of Left Ventricle
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Effect of beta-blocker therapy on heart rate response in patients with hypertension and newly diagnosed untreated obstructive sleep apnea syndrome
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Influence of duration of Type 1 (insulin-dependent) diabetes mellitus on 24-h ambulatory blood pressure and heart rate profile
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Actual field corrosion rate of offshore structures in the Baltic Sea along depth profile from water surface to sea bed
PublicationThe paper presents the results of field electrochemical investigations on the corrosion rate of carbon steel in seawater of the Baltic Sea at the location of the Baltic Beta production rig. The measurements were conducted throughout the year in seawater at different depths from the sea surface to the sea bed (about 75 m). The results revealed corrosion aggressiveness of the seawater along the entire depth profile. There was...
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Electrochemical oxidation of landfill leachate using boron-doped diamond anodes: pollution degradation rate, energy efficiency and toxicity assessment
PublicationElectrochemical oxidation (EO), due to high efficiency and small carbon footprint, is regarded as an attractive option for on-site treatment of highly contaminated wastewater. This work shows the effectiveness of EO using three boron-doped diamond electrodes (BDDs) in sustainable management of landfill leachate (LL). The effect of the applied current density (25–100 mA cm−2) and boron doping concentration (B/C ratio: 500 ppm, 10,000...
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Pendant Proton-Relays Systematically Tune the Rate and Selectivity of Electrocatalytic Ammonia Generation in a Fe-Porphyrin Based Metal-Organic Framework
PublicationElectrocatalytic nitrite reduction (eNO2RR) is a promising alternative route to produce ammonia (NH3). Until now, several molecular catalysts have shown capability to homogeneously reduce nitrite to NH3, while taking advantage of added secondary-sphere functionalities to direct catalytic performance. Yet, realizing such control over heterogeneous electrocatalytic surfaces remains a challenge. Herein, we demonstrate that heterogenization...
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WIG rate of return histogram and normal distribution curve
Open Research DataThe conducted market analysis covered the period of stock exchange quotations from the beginning of 2010 to the end of 2019 (04/01/2010 - 30/12/2019). Daily data was used, in the form of closing prices of indices operating on the Warsaw Stock Exchange. In order to obtain a complete and generalized picture of the market, the quotations of 4 indices were...
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The fertility rate (TFR) in selected EU countries in 2015
Open Research DataThe main reasons for the negative consequences of demographic changes are: natural increase in the life span of the population, decline in fertility and emigration of unusual dimensions.
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The fertility rate (TFR) in Poland in the period 1955-2017
Open Research DataThe fertility rate has dropped 2.5 times over the last 60 years. Immediately after the baby boom in the first half of the 1980s, many generations of women born in the second half of the 1970s, an increase in the number of births from the mid-1990s, were expected as a result of entering the age of the highest fertility age in Poland. which lasted until...
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Koncert Zimowy – Golden Gate String Quartet
EventsW świąteczny klimat wprowadzi słuchaczy kwartet smyczkowy Golden Gate String Quartet i dwóch świetnych wokalistów.
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RARE-EARTH ELEMENTS DOPING OF BARIUM CERATE AND ZIRCONATE SOLID SOLUTION
PublicationThe properties of doped barium cerate barium zirconate solid solution are presented in presented work. It was found that doping of solid solution of barium cerate and zirconate by rare-earth elements have an influence on microstructure and electrical properties of the samples.
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Application of virtual gate for counting people participating in large public events
PublicationThe concept and practical application of the developed algorithm forpeople counting in crowded scene is presented. The aim of the work is to estimatethe number of people passing towards entrances of a large sport hall. Thedetails of implemented the Virtual Gate algorithm are presented. The video signalfrom the camera installed in the building constituted the input for the algorithm.The most challenging problem was the unpredicted...
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The effect of the late wood share in the annual ring growth on the cutting power
PublicationW pracy przedstawiono wpływ udziału drewna późnego w przyroście rocznym na zapotrzebowanie mocy skrawania na jedną piłę podczas przecinania drewna sosnowego na pilarce ramowej PRW15-M. Drewno sosnowe pochodziło z 4. Krain Geograficznych Polski. Otrzymane wyniki poddano analizie statystycznej, która wykazała, że dla większości Krain korelacja pomiędzy udziałem drewna późnego w przyroście rocznym i mocą skrawania była znacząca na...
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Modal Analysis of a Steel Radial Gate Exposed to Different Water Levels
PublicationWith the increase in water retention needs and planned river regulation, it might be important to investigate the dynamic resistance of vulnerable elements of hydroelectric power plants, including steel water locks. The most frequent dynamic loads affecting hydroengineering structures in Poland include vibrations caused by heavy road and railway traffic, piling works and mining tremors. More destructive dynamic loads, including...
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Modal analysis of a fish-belly flap type of steel water gate
PublicationABSTRACT: The results of a modal analysis of the fish-belly flap type of steel water gate are presented in the paper. The analysis was conducted for a detailed numerical model of the structure using four-node quadrilateral shell elements. The study was focused on the examination of the influence of positioning of the flap gate and hydrostatic pressure of water on the eigenvalues and eigenmodes of the structure. The results of the study...
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Oxidative Stress Level in the Testes of Mice and Rats during Nickel Intoxication
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The Fluoride Content of Yerba Mate Depending on the Country of Origin and the Conditions of the Infusion
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Predictive method of improvement of the generators rated power usage in inductive heating
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Flow cytometric analysis of reticulocyte maturation after erythropoietin administration in rats
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Predictive Factors of Late Venous Aortocoronary Graft Failure: Ultrastructural Studies
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Cytotoxicity, acute and subchronic toxicity of ionic liquid, didecyldimethylammonium saccharinate, in rats
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Degree Days as a Method to Estimate the Optimum Harvest Date of ‘Conference’ Pears
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Regulation of the switch from early to late bacteriophage λ DNA replication
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Degree Days as a Method to Estimate the Optimal Harvest Date of ‘Conference’ Pears
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MicroRNA composition of plasma extracellular vesicles: a harbinger of late cardiotoxicity of doxorubicin
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Potential protective effect of ovocystatin on aging-related cognitive impairment in rats
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Towards modelling of the environmental fate of pharmaceuticals using the QSPR-MM scheme
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A DFT+U study of carbon nanotubes under influence of a gate voltage
PublicationA possibility of appearance of antiferromagnetic ordering in armchair carbon nanotubes and graphene is studied using density functional theory within a DFT+U approach. It is shown that the Coulomb repulsion between electrons in the -orbitals of graphene would need to reach a threshold value of ,...
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Implementacja odbiornika RAKE w technologii SDR (Software Defined Radio)
PublicationRóżnorodność standardów systemów radiokomunikacyjnych, w tym telefonii komórkowej i bezprzewodowej, przy dużej ruchliwości ich abonentów, powoduje, że niezbędne jest skonstruowanie wielosystemowego terminala ruchomego, mającego techniczne możliwości współpracy z systemami radiokomunikacyjnymi działającymi w różnych standardach. W ten sposób zrodziła się idea radia definiowanego programowego SDR (Software Define Radio), bazująca...
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Analytical techniques in studies of the environmental fate of pharmaceuticals and personal-care products
PublicationW pracy przedstawiono dane literaturowe odnośnie źródeł emisji, dróg transportu, przemian i metabolizmu, pomiomu stężeń ksenobiotyków z grupy farmaceutyków i środków higieny osobistej w próbkach pobranych z różnych elementów środowiska (woda, gleba, osady denne) oraz próbek bioty. Szczególną uwagę zwrócono na techniki analityczne wykorzystywane w badaniach losu środowiskowego w/w zanieczyszczeń.
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Measurement of rare probes with the silicon tracking system of the CBM experiment at FAIR
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Thermal properties of rare earth elements complexes with 1,3,5-benzenetricarboxylic acid
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Primary splenic angiosarcoma: a very rare and aggressive neoplasm with a poor prognosis
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Description of the Dataset Hanow – Praecepta de Arte Disputandi – Transcription and Photographs
PublicationThis article briefly characterises the “Hanow – Praecepta de arte disputandi – transcription and photographs” research dataset. The dataset was created based on photographs and transcriptions of the manuscript of the Latin lectures on the rules of effective discussion (the title of the manuscript: Praecepta de arte disputandi) by Michael Chris-toph Hanow (1695–1773), professor of Gdańsk Academic Gymnasium. The original document...
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Characterization and photocatalytic activity of rare earth metal-doped titanium dioxide
PublicationW publikacji została przedstawiona metoda otrzymywania fotokatalizatorów na bazie TiO2 modyfikowanego erbem i iterbem. Otrzymane nanocząstki zostały scharakteryzowane za pomocą powierzchni właściwej BET, objętości porów. Zostały przedstawione widma absorpcyjne UV-Vis oraz właściwości fluorescencyjne otrzymanych nanoproszków. Dokonano również przedstawienia wyników pomiaru aktywności fotokatalitycznej pod wpływem promieniowania...
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A review of rare earth oxides-based photocatalysts: Design strategies and mechanisms
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Phytoextraction and recovery of rare earth elements using willow (Salix spp.)
PublicationSoil and water contaminations are caused by rare earth elements (REEs) due to mining and industrial activities, that threaten the ecosystem and human health. Therefore, phytoremediation methods need to be developed to overcome this problem. To date, little research has been conducted concerning the phytoremediation potential of Salix for REEs. In this study, two Salix species (Salix myrsinifolia and Salix schwerinii) and two Salix...
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Thermochemistry of rare earth perovskites Na3xRE0.67−xTiO3 (RE = La, Ce)
PublicationHigh-temperature oxide melt solution calorimetry using sodium molybdate (3Na2O·4MoO3) solvent at 973 K was performed for the Na3xRE0.67−xTiO3 (RE = La, Ce) perovskite series. The enthalpies of formation of lanthanum perovskites from oxides (La2O3, Na2O, TiO2), are −107.25 ± 2.56, −93.83 ± 6.06, −80.68 ± 5.93, and −33.49 ± 4.26 kJ/mol and enthalpies of formation from elements are −1614.05 ± 5.37, −1596.44 ± 7.68, −1594.03 ± 7.58,...
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RAGE as a Novel Biomarker for Prostate Cancer: A Systematic Review and Meta-Analysis
PublicationThe receptor for advanced glycation end-products (RAGE) has been implicated in driving prostate cancer (PCa) growth, aggression, and metastasis through the fueling of chronic inflammation in the tumor microenvironment. This systematic review and meta-analysis summarizes and analyzes the current clinical and preclinical data to provide insight into the relationships among RAGE levels and PCa, cancer grade, and molecular effects....
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Attenuation of Hyperglycemia in Diabetic Rats Assisted by Immobilized Probiotic in Sodium Alginate
PublicationDiabetes mellitus type 2 (DM2) is the most common chronic disease worldwide, characterized mainly by increased glucose concentration in the blood and affecting several organs’ functionality. The daily consumption of probiotic bacteria can help control diabetes and reduce the damage caused. Cell immobilization techniques are a powerful tool that provides physical cell protection to such probiotic bacteria against gastrointestinal...