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Tytuł:
Improving the efficiency of fluidized bed comminution of limestone samples
Autorzy:
Wysocki, D.
Powiązania:
https://bibliotekanauki.pl/articles/1818778.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
comminution
grinding
limestone
desulfurization
rozdrabnianie
mielenie
wapień
odsiarczanie
Opis:
Purpose: The aim of the research was to describe the properties and methods of using limestone for desulfurization of flue gases and to analyse the process of fluidized bed comminution and the influence of selected parameters and stand modification on quality of product of fluidized bed comminution. Design/methodology/approach: Tests of the grinding process on the fluidized bed were carried out using a modified fluid bed mill for operational variable parameters and their results were compared with the results received before modification. The modification of the test stand consisted of increasing the height of the grinding chamber, which ensured an increase in the volume of the fluidized layer where the grinding process takes place. Findings: Main parameters that determined the effects of comminution in the analyzed case were: overpressure of working air and the rotor speed of the classifier. The introduction of the modifications of the test stand ensured an increase in the volume of the fluidized layer in which the grinding process takes place. As well as a greater gravitational classification, which caused larger grains to be stopped in the grinding chamber and shift of characteristics of grain compositions towards finer grains. Research limitations/implications: It is assumed that the diameter of sorbent grains used in the fluidized bed can not exceed 6 mm. The granularity of the offered sorbents ranges from 0.1 mm to 1.2 mm. The quality of the desulfurization process depends on the overall granulation of used sorbent grains. Practical implications: Appropriately selected sorbent grains used in wet and dry flue gas desulphurisation plants ensure improved efficiency of the desulphurisation process and lower operating costs of the installation. Originality/value: Thanks to the comminution method used, a sorbent is obtained without impurities and with an increased specific surface, which can be used in fluidized bed boilers.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 107, 1; 5--14
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effectiveness of modified sodium bicarbonate in the purification of exhaust gases from HCl and HF
Autorzy:
Wysocki, D.
Szymanek, A.
Powiązania:
https://bibliotekanauki.pl/articles/2201060.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
sodium bicarbonate
removal of HCl
removal of HF
mechanical activation
thermal activation
dry sorbent injection
wodorowęglan sodu
aktywacja mechaniczna
aktywacja termiczna
wtrysk suchych sorbentów
DSI
Opis:
Purpose The effectiveness of gas purification depends on the sorption properties of sorbents. The aim of the research was to determine the ability of sodium sorbents to remove gaseous pollutants such as HCl and HF. Design/methodology/approach The research used baking soda subjected to mechanical and thermal activation, which was introduced into the hot flue gas circuit, similar to the dry flue gas cleaning method used in all kinds of boilers. Findings In almost all cases, mechanical and thermal treatment of baking soda allowed for a significant improvement in the reduction of hydrogen chloride and hydrogen fluoride concentrations in the exhaust gases produced during the combustion of polyethylene terephthalate (PET) bottles. Research limitations/implications The preparation of sorbents must consider the optimum development of the material's specific surface area, especially during thermal activation, to prevent pores from sintering. Practical implications In wet and dry flue gas cleaning processes, sodium compounds are used in the power industry. Appropriate preparation of the sorbent allows for improving the effectiveness of reducing the concentration of harmful substances and reducing investment and operating costs. Originality/value From the point of view of process optimisation, the results obtained will contribute to the identification of optimal operating conditions in dry sorbent injection systems to prevent the pores on the surface of the sorbent from clogging when injected into hot flue gases.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2022, 114, 2; 57--66
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of mallard’s (Anas platyrhynchos) behavior depending on phenology period and the size of the flock on water basins in Szczecin
Analiza zachowań krzyżówki (Anas platyrhynchos) w zależności od okresu fenologicznego i wielkości stada
Autorzy:
Wojcieszak, H.
Wysocki, D.
Kaliciuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/841819.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
behavioural analysis
mallard
Anas platyrhynchos
phenological period
flock size
sperm competition
forced copulation
courtship
water basin
Szczecin city
Opis:
The subject of the study is the behaviour of Mallard’s Anas platyrhynchos and was carried out in the city of Szczecin (Poland) in 2009–2010. We compared frequency of fights, rapes, courtships, copulations and whistles on a water basins within both big and small flocks, and in different phenology periods. The study shows significant relationship between season, number of ducks on a pond and frequency of fights, as well as between whistles and fights, whistles and season and courtships and season. The results show that the most active period for ducks are the autumn and winter months (pairing period), while more aggressive behaviours can be observed when the population density is high.
Przedmiotem badań były zachowania kaczki krzyżówki Anas platyrhynchos . Badania zostały przeprowadzone w Szczecinie w latach 2009–2010. Porównano częstość występowania walk, kopulacji wymuszonych (gwałtów), zalotów, standardowych kopulacji oraz wydawanych przez samce gwizdów w dużych i małych stadach ptaków oraz podczas różnych pór roku. Badania wykazują znaczącą zależność między sezonem i liczbą kaczek na zbiorniku wodnym a częstotliwością walk, a także między gwizdami i walkami, gwizdami i sezonem oraz zalotami i sezonem fenologicznym. Wykazano, że okres największej aktywności ptaków przypada na jesień i zimę (czas tworzenia się par). Najwięcej zachowań agresywnych można zaobserwować natomiast przy wysokim zagęszczeniu populacji.
Źródło:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica; 2013, 20
1230-3976
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digenean trematodes from six species of birds (Passeriformes, Piciformes and Strigiformes) from north-western Poland
Autorzy:
Rzad, I.
Sitko, J.
Wysocki, D.
Stepniewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/840105.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
digenean trematode
animal species
terrestrial bird
bird
Passeriformes
Piciformes
Strigiformes
North-Western Poland
Polska
Digenea
parasite
woodland habitat
urban habitat
new location
Źródło:
Annals of Parasitology; 2011, 57, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digenean trematodes from six species of birds (Passeriformes, Piciformes and Strigiformes) from north-western Poland
Autorzy:
Rzad, I.
Sitko, J.
Wysocki, D.
Stepniewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2143214.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
digenean trematode
animal species
terrestrial bird
bird
Passeriformes
Piciformes
Strigiformes
North-Western Poland
Polska
Digenea
parasite
woodland habitat
urban habitat
new location
Opis:
Ten species of digeneans were found in a survey of six species of terrestrial birds associated with woodland and urban habitats of north-western Poland carried out in 2006–2009: Leucochloridium paradoxum Carus, 1835 (Leucochloridiidae) from the Cyanistes caeruleus (L.) and the Parus major L. (Paridae); Leuchochloridium perturbatum Pojmańska, 1968 (Leucochloridiidae) from the Turdus merula L., (Turdidae) and the Corvus monedula L. (Corvidae); Leucochloridium sp. (Leucochloridiidae Poche, 1907) from the Asio otus (L.) (Strigidae) and P. major; Strigea strigis (Schrank, 1788) (Strigeidae) from the A. otus; Morishitium elongatum (Harrach, 1921) (Cyclocoelidae) and Psilotornus confertus Machalska, 1974 (Psilostomidae) and Leyogonimus postgonoporos (Neiland, 1951) and Lutztrema attenuatum (Dujardin, 1845) (Dicrocoeliidae) from the T. merula; Plagiorchis maculosus (Rudolphi, 1802) (Plagiorchiidae) from the C. caeruleus; Prosthogonimus ovatus (Rudolphi, 1803) (Prosthogonimidae) from the Dendrocopos major (Linnaeus) (Picidae); Zonorchis petiolatus (Railliet, 1900) (Dicrocoeliidae) from the T. merula and the C. monedula. Five species and one genus of digeneans: L. paradoxum from the C. caeruleus and the P. major; Leucochloridium sp. from the A. otus and P. major; P. confertus from the T. merula; P. maculosus from the C. caeruleus; P. ovatus from the D. major and Z. petiolatus from the C. monedula represent new Polish host records. S. striges and L. postgonoporus represent new Polish locations.
Źródło:
Wiadomości Parazytologiczne; 2011, 57, 4; 271-276
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The structure and abundance dynamics of amphibian communities in the farmland of Insko Landscape Park (Pomeranian Lakeland)
Strukura i dynamika liczebności zespołu płazów krajobrazu rolniczego Ińskiego Parku Krajobrazowego (Pojezierze Zachodniopomorskie)
Autorzy:
Michonski, G.
Wysocki, D.
Sadanowicz, P.
Sawicki, K.
Powiązania:
https://bibliotekanauki.pl/articles/841773.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
population structure
abundance dynamics
amphibian community
farmland
Insko Landscape Park
Pomeranian Lake District
Triturus cristatus
Bombina bombina
Bufo calamita
Opis:
The paper presents results of a study conducted in Ińsko Landscape Park in the years 2002 and 2003. The study has confirmed the occurrence of 11 amphibian species, which coincides with results obtained previously by other researchers. The presence of two amphibian species from the “Red List of Threatened Species in Poland”, namely Triturus cristatus and Bombina bombina has been confirmed. Another important result of the study is the confirmation of the occurrence of Bufo calamita in the studied area. Finally, the paper presents the dynamics of occurrence of selected species.
W artykule zaprezentowano wyniki badań płazów krajobrazu rolniczego na wybranym terenie Ińskiego Parku Krajobrazowego w latach 2002 i 2003. Stwierdzono występowanie na tym terenie 11 gatunków płazów, w tym 2 gatunki – Triturus cristatus i Bombina bombina – figurujące na „Czerwonej liście gatunków zagrożonych w Polsce”. Dla wybranych gatunków przedstawiono dynamikę liczebności w okresie godowym.
Źródło:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica; 2012, 19
1230-3976
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weighting of new starch-polymer salted mud with PT-23 polymer
Autorzy:
Wysocki, S.
Bielewicz, D.
Wysocka, M.
Lewicki, D.
Wilaszek, J.
Powiązania:
https://bibliotekanauki.pl/articles/298703.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling muds
weighting materials
starch mud
Opis:
Rheological properties of mud should assure high rate of penetration and supply maximal hydraulic power to the hole bottom. From this point of view drilling mud should have as little density and viscosity as possible and also minimal solid phase fraction. By the reason of the hole depth and geological conditions in the region it often occurs that maintenance of low density is impossible and drilling mud have to be treated with weighting materials. The process may cause change of mud rheological parameters and cause decrease of penetration rate. In case of weighted mud there is also a problem consisting in sedimentation of weighting material. During these project realization there was developed recipe of new mud for well completion with new PT-23 polymer. The next step was testing of possibilities of weighting the mud with different weighting materials: barite with grain size lower than 75 um, barite with grain size lower than 25 um, commercial barite, hematite, bridging agent M-25. Barite with grain size lower than 75 um and barite with grain size lower than 25 um were conditioned in water, then wet separated into fractions.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 1; 157-165
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An algebraic analysis approach to 2-D discrete problems
Autorzy:
Przeworska-Rolewicz, D.
Wysocki, H.
Powiązania:
https://bibliotekanauki.pl/articles/206798.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
analiza algebraiczna
operator początkowy
operator różnicowy
2D systems
algebraic analysis
backward shift
difference operator
forward shift
initial operator
right inverse
right invertible operator
Opis:
A model of algebraic analysis for the 2-index sequences (of the type 2-D) is considered. For difference operators of the form D{x_m,n}:= {x_m+1,n+1 - A_m,nX_m,n} the right inverses and the corresponding initial operators are constructed. Having already known the initial operators, one can determine solutions of the corresponding initial value problems.
Źródło:
Control and Cybernetics; 2001, 30, 2; 149-158
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between the rheological parameters and zeta potential of bentonites
Autorzy:
Kowalczyk, D.
Wach, M.
Plewik, A.
Wysocki, S.
Powiązania:
https://bibliotekanauki.pl/articles/298880.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
electrokinetic phenomena
zeta potential
drilling fluids
bentonite
Opis:
The paper presents an estimation of bentonites quality using electrokinetic phenomena occurring in dispersed clay systems. The idea behind the work is to demonstrate the relationship between the rheological parameters of the tested materials, and their zeta potential and consequently determine the suitability of these criteria for preparing drilling fluids.
Źródło:
AGH Drilling, Oil, Gas; 2016, 33, 4; 663-669
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical tests of the double spring with hangers
Autorzy:
Krasoń, W.
Wysocki, J.
Zając, K.
Powiązania:
https://bibliotekanauki.pl/articles/245670.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
double multi-leaf spring
suspension of a motor truck
stand test
vertical load
1D FE models
3D FE models
Opis:
Subject of the work include selected numerical models of the test stand intended for testing a prototype double multi-leaf spring of bi-linear nature. Basic design assumptions of the stand were as follows: provide laboratory tests of multi-leaf (single and double) springs designed for dependent suspensions of passenger cars of permissible weight up to 3,5 tones. The stand should allow for testing basic spring and strength characteristics in the quasi-static conditions and dynamic conditions with the impact of the force impulse or a set variable load characterized by a particular force amplitude (displacement) and frequency of its variations. Considered stand models include the tested spring, base, support and the hanger. This paper presents two types of FEM models of the spring element (beam and 3D). In the first element, components of the spring-hanger system were mapped by means of beam elements, in the second one by means of definite solid elements. The spring was loaded with a vertical force from 0 to 10000 N. A non-linear analysis of the bi-linear spring was carried out including clearance as well as the elastic analysis of the stand. The results of the numerical tests are presented in a form of tabular specifications, diagrams of displacements, and reduced stresses of selected components of the stand.
Źródło:
Journal of KONES; 2015, 22, 4; 163-170
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research injection pressure with the Kistler 4067E pressure transmitter on Sulzer engine 3AL25/30
Autorzy:
Cuper-Przybylska, D.
Wysocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/243556.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel
engine
marine engine
injection pressure
Opis:
Commonly used in the shipbuilding are combustion piston diesel engines that serve as power generators and main propulsion engines. More stringent of environmental regulations, however, require a more detailed understanding of the processes involved in piston engine combustion to reduce emissions to the environment. Also, the main reason for interest in research in the injection system is also the desire to obtain the highest piston engine power at the lowest fuel consumption. The article presents a study of changes in fuel injection pressure, which allows the operator to analyse the thermodynamic processes taking place in the cylinder. The injection pressure measurement allows you to make proper operating, maintenance and even repair decisions on the object under test. The purpose of this article is to investigate the operation of the injection pressure sensor and to compare the pressure curves measured by the Kistler 4067E sensor in various piston engine-operating states and the simulated failures of the SULZER 3AL25/30 diesel engine. The study was conducted on the SULZER 3AL25/30 engine at the Marine Engine Laboratory at the Gdynia Maritime University. Tests carried out with a measuring instrument for sampling are equipped with a Kistler 4067E pressure transducer, a Kistler 4624A amplifier and a Unitest 2008 computer system serviced with a recorder, processing and signal recording. For a thorough analysis, research conducted at different loads and different simulated engine failure.
Źródło:
Journal of KONES; 2017, 24, 3; 29-36
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increase in glycaemia stimulates reactive oxygen species (ROS) production by polymorphonuclear neutrophils in type 2 diabetic patients
Autorzy:
Pisarczyk-Wiza, D.
Zozulinska-Ziolkiewicz, D.
Wysocki, H.
Wierusz-Wysocka, B.
Powiązania:
https://bibliotekanauki.pl/articles/3393.pdf
Data publikacji:
2011
Wydawca:
Instytut Medycyny Wsi
Tematy:
glycemia
reactive oxygen species
production
polymorphonuclear neutrophil
patient
diabetes type 2
Źródło:
Journal of Pre-Clinical and Clinical Research; 2011, 05, 1
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semen quality assessments and their significance in reproductive technology
Autorzy:
Kordan, W.
Fraser, L.
Wysocki, P.
Strzezek, R.
Lecewicz, M.
Mogielnicka-Brzozowska, M
Dziekonska, A
Soliwoda, D
Koziorowska-Gilun, M
Powiązania:
https://bibliotekanauki.pl/articles/32408.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Semen quality assessment methods are very important in predicting the fertilizing ability of persevered spermatozoa and to improve animal reproductive technology. This review discusses some of the current laboratory methods used for semen quality assessments, with references to their relevance in the evaluation of male fertility and semen preservation technologies. Semen quality assessment methods include sperm motility evaluations, analyzed with the computer-assisted semen analysis (CASA) system, and plasma membrane integrity evaluations using fluorescent stains, such as Hoechst 33258 (H33258), SYBR-14, propidium iodide (PI), ethidium homodimer (EthD) and 6-carboxyfluorescein diacetate (CFDA), and biochemical tests, such as the measurement of malondialdehyde (MDA) level. This review addresses the significance of specific fluorochromes and ATP measurements for the evaluation of the sperm mitochondrial status. Laboratory methods used for the evaluation of chromatin status, DNA integrity, and apoptotic changes in spermatozoa have been discussed. Special emphasis has been focused on the application of proteomic techniques, such as two-dimensional (2-D) gel electrophoresis and liquid chromatography mass spectrometry (LC-MS/MS), for the identification of the properties and functions of seminal plasma proteins in order to define their role in the fertilization-related processes.
Źródło:
Polish Journal of Veterinary Sciences; 2013, 16, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of Hand Posture Based on a Point Cloud Descriptor and a Feature of Extended Fingers
Autorzy:
Warchoł, D.
Wysocki, M.
Powiązania:
https://bibliotekanauki.pl/articles/384737.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
hand posture recognition
depth cameras
Kinect
point cloud
Viewpoint Feature Histogram
Opis:
Our work involves hand posture recognition based on 3D data acquired by the KinectTM sensor in the form of point clouds. We combine a descriptor built on the basis of the Viewpoint Feature Histogram (VFH) with additional feature describing the number of extended fingers. First, we extract a region corresponding to the hand and then a histogram of the edge distances from the palm center is built. Based on quantized version of the histogram we calculate the number of extended fingers. This information is used as a first feature describing the hand which, together with VFH-based features, form the feature vector. Before calculating VFH we rotate the hand making our method invariant to hand rotations around the axis perpendicular to the camera lens. Finally, we apply nearest neighbor technique for the posture classification. We present results of crossvalidation tests performed on a representative dataset consisting of 10 different postures, each shown 10 times by 10 subjects. The comparison of recognition rate and mean computation time with other works performed on this dataset confirms the usefulness of our approach.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 1; 48-57
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear swelling test (LST) of clay formation under the influence of newly developed drilling fluids with the addition of cationic polymers
Autorzy:
Wysocki, S.
Wiśniowski, R.
Ryznar, D.
Gaczoł, M.
Powiązania:
https://bibliotekanauki.pl/articles/298599.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling mud
polymers
shales
LST
Opis:
This paper shows research of Linear Swelling Test (LST) of shale rocks under the influence of three drilling muds with different cationic polymers. Tested polymers have been synthetized at the Drilling, Oil and Gas Faculty of AGH UST Krakow. Research findings indicate that synthesized polymers as well as developed on its base drilling fluids effectively inhibit hydration and prevent the disintegration of clay formation.
Źródło:
AGH Drilling, Oil, Gas; 2015, 32, 4; 693-701
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł

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