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Tytuł:
Rozcieńczenie grzybni mikoryzowej firmy Mykoflor
Dilution of the mycorrhiza mycelium produced by Mykoflor company
Autorzy:
Kubiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/289510.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
grzybnia mikoryzowa
mikoryza
rozcieńczenie
szczepionka mikoryzowa
mycorrhiza mycelium
dilution
mycorrhiza
Opis:
Ważnym typem współżycia roślin z organizmami glebowymi jest mikoryza. W przypadku grzybów mikoryzowych następuje współdziałanie między grzybem i rośliną, polegające na aktywizacji systemów enzymatycznych i procesów fizjologicznych obu partnerów, ułatwiających zasiedlanie korzeni przez grzyba. Grzybnia nie powinna być agresywna w stosunku do rośliny, co jest uwarunkowane stopniem jej rozcieńczenia.
Mycorrhiza it is important type of symbiosis between plants and soil organisms. The cooperation between fungus and plants is connected with activity of enzymatic systems and physiological processes of the partners, which help in location of roots by fungus. The mycorrhiza mycelium shouldn't be too aggressive in relation to plants, so suitable dilution of the mycelium is necessary.
Źródło:
Inżynieria Rolnicza; 2007, R. 11, nr 3 (91), 3 (91); 111-116
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of technology for obtaining water-soluble bacterial melanin and determination of some of pigment properties
Autorzy:
Aghajanyan, A.E.
Vardanyan, A.A.
Hovsepyan, A.C.
Hambardzumyan, A.A.
Filipenia, V.
Saghyan, A.C.
Powiązania:
https://bibliotekanauki.pl/articles/80261.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
melanin
fermentation process
aeration
process optimization
sorption
dilution
pigment property
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 4
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the transport of brine in the Odra River downstream of a mines discharge
Autorzy:
Zieliński, Szymon
Kostecki, Stanisław
Stefanek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2037708.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
water quality
mining
wastewater management
brine
dilution
numerical modelling
CFD
Opis:
The mining of underground deposits causes the inflow of water to workings and the necessity of pumping them to the surface. The mining plant of KGHM Polska Miedź S.A. extracts copper ore in plant branches with different hydrogeological conditions. The inflowing water into the workings is characterised by variable mineralisation, which depends on the location of the branch. In the south-western part of the deposit, a low-mineralised stream with a relatively high flow rate can be observed, while the outflow of highly saline waters occurs in the north-eastern branch. Despite the activities undertaken that aim at using the pumped-off mine waters industrially, it is necessary to deposit them into the Odra River. Reducing the environmental impact on the Odra River is one of KGHM’s goals, which is being implemented by stabilising its salt concentration at a safe level. The paper presents the results of a 3D simulation of brine plume propagation based on a numerical model of advection-diffusion and turbulent flow. Bathymetric data from a section of the river approximately 500 m long and point data from an Odra water quality test were used to develop and validate the model. The paper discusses the types of factors that minimise the impact of brine discharge. The developed model will be used in the future to propose solutions that accelerate the mixing of mine waters with the waters of the Odra River.
Źródło:
Studia Geotechnica et Mechanica; 2021, 43, 4; 366-379
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positioning Using GPS and GLONASS Systems
Autorzy:
Kujawa, L.
Rogowski, J. B.
Kopańska, K.
Powiązania:
https://bibliotekanauki.pl/articles/116742.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Global Navigation Satellite System (GNSS)
Global Positioning System GPS
GLONASS
Precise Positioning
Positioning Accuracy
Geometric Dilution of Precision (GDOP)
Horizontal Dilution of Precision (HDOP)
DOP Analysis
Opis:
This paper presents an experiment involving the processing of observations using the GPS and GPS/GLONASS systems performed at the BOGO, BOGI, and JOZ2 IGS stations. Due to the small number of GLONASS satellites, the authors failed to receive any significant improvement in positioning accuracy using GPS and GLONASS observations jointly.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 283-286
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental studies on the relationship between HDOP and position error in the GPS system
Autorzy:
Specht, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/2052120.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Global Positioning System
GPS
Horizontal Dilution of Precision
HDOP
position error
Opis:
2D position error in the Global Positioning System GPS depends on the horizontal dilution of precision (HDOP) and User Equivalent Range Error UERE. The non-dimensional HDOP coeffcient, determining the influence of satellite distribution on the positioning accuracy, can be calculated exactly for a given moment in time. However, the UERE value is a magnitude variable in time, especially due to errors in radio propagation (ionosphere and troposphere effects) and it cannot be precisely predicted. The variability of the UERE causes the actual measurements (despite an exact theoretical mathematical correlation between the HDOP value and the position error) to indicate that position errors differ for the same HDOP value. The aim of this article is to determine the relation between the GPS position error and the HDOP value. It is possible only statistically, based on an analysis of an exceptionally large measurement sample. To this end, measurement results of a 10-day GPS measurement campaign (900,000 fixes) have been used. For HDOP values (in the range of 0.6-1.8), position errors were recorded and analysed to determine the statistical distribution of GPS position errors corresponding to various HDOP values. The experimental study and statistical analyses showed that the most common HDOP values in the GPS system are magnitudes of: 0.7 ( = 0.353) and 0.8 ( = 0.432). Only 2.77% of fixes indicated an HDOP value larger than 1. Moreover, 95% of measurements featured a geometric coeffcient of 0.973 - this is why it can be assumed that in optimal conditions (without local terrain obstacles), the GPS system is capable of providing values of HDOP ≤ 1, with a probability greater than 95% (2). Obtaining a low HDOP value, which results in a low GPS position error value, calls for providing a high mean number of satellites (12 or more) and low variability in their numer.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 17-36
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Properties of High Chromium Hardfacings Made with Using Pulsed Arc
Autorzy:
Gucwa, M.
Winczek, J.
Powiązania:
https://bibliotekanauki.pl/articles/381430.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hardfacing
heat input
self-shielded cored wire
dilution
napawanie
dopływ ciepła
rdzeń
Opis:
The paper discusses the possibility of using pulsed arc hardfacing for depositing high chromium and carbon surfaces. In these studies self-shielded cored wire was used as a material for hardfacing. Pulsed arc is used in welding technologies to better control of transport molten metal in the welding arc and heat input. The correct heat input results in limited dilution surfaces that is very important in wear prevention technologies. The paper presents the results of research on the geometric parameters and hardness of deposited surfaces. The investigation was carried out with various welding parameters that were designed in heat source. The survey was conducted on the specimens that were subjected to metallographic examination hardness test.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1 spec.; 37-40
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy of the GPS positioning system in the context of increasing the number of satellites in the constellation
Autorzy:
Specht, C.
Mania, M.
Skora, M.
Specht, M.
Powiązania:
https://bibliotekanauki.pl/articles/259507.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
GPS
User Range Error
Dilution of Precision
GPS Almanac
Accuracy of Positioning
Opis:
A possibility of utilising the GPS system for navigation and transport are fundamentally dependent on the accuracy in positioning. Two fundamental factors decisive for its value are the values of the User Range Error (URE) and Dilution of Precision (DOP), strictly related to the number of satellites forming the constellation. The nominal constellation of GPS satellites consists of 24 units which gives a possibility of identification of coordinates all over the globe. In the last few years, however, the nominal number of satellites in the constellation was much higher, and the URE value has been constantly increasing. The authors of the paper try to estimate the impact of the changing number of GPS satellites on accuracy of position coordinates with a variable URE value. Mathematical model for estimating geometrical indicators’ value, utilizing data derived from the almanac files has been presented. Following a drawn-up algorithm and calculations made with Mathcad software, the authors carried out a comparative analysis of mean daily values of DOP indicators for a variable number of satellites included in the GPS constellation in the years 2001-2013. Then, the authors have established representative values of Two Distance Root Mean Square Error (2drms) 2D and 3D, and calculated a percentage increase of accuracy in the period under discussion.
Źródło:
Polish Maritime Research; 2015, 2; 9-14
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hugo Steinhaus problem of estimation of the war casualities on the base of contemporary press obituaries
Autorzy:
Kopocińska, Ilona
Kopociński, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/748320.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Steinhaus of obituaries method, inflated geometric probability distribution, binomial dilution, parameter estimation
Opis:
Przedmiotem noty jest próba rekonstrukcji, wzmiankowanej we wspomnieniach Hugona Steinhausa, metody oszacowania strat wojennych w armii Niemieckiej Rzeszy podczas drugiej wojny światowej przy wykorzystaniu ówczesnych nekrologów prasowych .Zakładając dla wielkości rodziny niemieckiej rozdęty rozkład geometryczny i wprowadzając pewne przekształcenia tej zmiennej losowej oraz biorąc pod uwagę rozkład treści nekrologów, wskazujemy na możliwość oszacowania frakcji poległych w armi.
In the memoirs of Professor Hugo Steinhaus the problem of estimation of the war casualties of German Army during the SecondWorldWar on the base of contemporary press obituaries is mentioned.A ssuming the inflated geometric probability distribution function for the size of German family, introducing some transformations of this random variable and taking into account the probability distribution function of the contens of obituaries we propose in the note a solution of the problem.
Źródło:
Mathematica Applicanda; 2007, 35, 49/08
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Levels and sources of PCDDs, PCDFs and dl-PCBs in the water ecosystems of central Poland — A mini review
Autorzy:
Zieliński, Marek
Kamińska, Joanna
Czerska, Marta
Ligocka, Danuta
Urbaniak, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2178910.pdf
Data publikacji:
2014-12-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
environment
isotope dilution HRGC/HRMS
PCDDs/PCDFs
dl-PCBs
sediments
surface water
Opis:
Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are unwanted by-products in a variety of industrial and thermal processes. They have been present on Earth long before the human era, since they may be also formed as a result of forest fires or volcanic explosions. Polychlorinated biphenyls (PCBs) in turn, have been intentionally produced by humans. Poland was a minor producer of PCB mixtures (Chlorofen and Tarnol), which were a source of direct and indirect environmental diffusion with PCB and less with PCDDs/PCDFs. Industrial accidents with PCDDs/PCDFs were absent in Poland. Their stability and resistance to thermal breakdown made them very dangerous for environment and, in consequence, due to their environmental persistence, bioaccumulation and biomagnification in the terrestrial and aquatic food chains, to humans. Humans may become affected by PCDDs/PCDFs and PCBs through environmental (soil and water contamination, fish and food), occupational (incinerators; pulp, paper and metallurgy industry; copper production), or accidental (Seveso accident) exposure. The aim of this review was to evaluate environmental hazard caused by PCDDs, PCDFs and dioxin-like-PCBs in the central region of Poland based on the accessible data on diffusion of those compounds in sediments and riverine, reservoir and storm water from our previous studies and discussed in the context of other achievements in Poland and elsewhere.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 6; 902-918
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural Analysis of Asymmetric Dilution by Rotating Direct Metal Deposition
Autorzy:
Choi, Byungjoo
Lee, Gwang-Jae
Yeom, Hyun-Ho
Lee, Moon-Gu
Jeon, Yongho
Powiązania:
https://bibliotekanauki.pl/articles/356931.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rotating direct metal deposition
asymmetric dilution
cross-sectional analysis
microstructure
metallurgical composition
Opis:
In this study, cross-section analysis was performed on a novel rotating direct-metal deposition method capable of preliminary surface treatment and damage repair of cylindrical inner walls. The cross-sectional shape, microstructure, and metallurgical composition were analyzed to verify feasibility. No defects such as porosity or cracks were found in the cross section, but asymmetric dilution was observed because of the non-coaxial powder nozzle. Microstructural coarsening was confirmed over a higher dilution area by high-magnification optical microscope images. As the dilution ratio was increased, hard carbides in the dendrite were bulkdiffused into inter-dendrite spaces, and the toughness was lowered by Fe penetration into the deposit. Therefore, the increased laser heat input can be modulated to the typical dilution by decreasing the laser scanning velocity.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 535-538
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Realizacja układu do pomiaru wpływu poziomu zurbanizowania terenu na jakość wyznaczania pozycji w systemie GPS
Implementation of a system for measuring the influence of the land urbanization level on the quality of determining positions in the GPS system
Autorzy:
Bielawski, Antoni
Lazarowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/37520389.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
nawigacja
GPS
jakość
wyznaczanie pozycji
Horizontal Dilution of Precision
HDOP
navigation
positioning
quality
Opis:
W artykule zaprezentowano projekt układu do rejestrowania położenia bezwzględnego z wykorzystaniem systemu GPS, który umożliwił przeprowadzenie badań nad wpływem poziomu zurbanizowania terenu na jakość wyznaczania pozycji. W tym celu dokonano rejestracji położenia w dwóch miejscach, w terenie zurbanizowanym oraz w dwóch w terenie niezurbanizowanym. Następnie dokonano analizy wyników w oparciu o parametr HDOP (ang. Horizontal Dilution Of Precision – współczynnik geometrycznej dokładności w płaszczyźnie poziomej) oraz liczbę widocznych satelitów.
The article presents the design of the absolute position recording system with the use of the GPS system, which made it possible to conduct research on the influence of the level of urbanization of the area on the quality of determining the position. For this purpose, position registration was made in two places in urbanized areas and in two in non-urbanized areas. Then, the results were analyzed based on the HDOP (Horizontal Dilution of Precision) parameter and the number of visible satellites.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2022, 75; 9-12
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Researches of pneumatic sowing machine with peripheral cells location and inertial superfluous seeds extraction
Autorzy:
Vasylkovska, K.
Vasylkovskyy, O.
Anisimov, O.
Trykina, N.
Powiązania:
https://bibliotekanauki.pl/articles/410833.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
pneumatic seeding machine/device
seed disc
experiment
cells filling factor
dilution
cells angular speed
Opis:
In the article we provide the new design of pneumatic sowing machine with peripheral cells on the seed disk and a passive device for removing extra seeds with inertia method for precise seeding of cultivated crops. A series of studies was proposed for sugar beet seeds sowing device, we defined the influence of dilution in a vacuum chamber of sowing device and angular velocity cell seed disk on the cells filling factor. The design of the new pneumatic sowing machine can significantly reduce the vacuum in the system having increased the angular speed in cell seed disk to the values of seeding device travelling speed, thus provide a constant point of seeds drop from the seed disc at the same trajectory of their flight to the furrows and the qualitative cells filling. To determine the rational parameters and modes of sowing device we used method of multifactor experiment planning. We determined the main levels and intervals of varying factors for sugar beet sowing along with determining the filling factor of cell seed disk. With application of package Statistica 6.0. for parameter optimization - cell seed disk filling factor was constructed response surface and line of even output.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 4; 85-89
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactive 3-methyl-2,6-diarylpiperidin-4-one, oxime and its copper(II) complex
Autorzy:
Thirunarayanan, G.
Lakshmanan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1070862.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antimicrobial activities
Copper(II) complex
Disc diffusion
Drug dilution
Piperidine-4-one
Piperidine-4-oneoxime
Opis:
namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime and copper(II) complex of this oxime was prepared by literature procedure. The purities of these ketone, oxime and copper complex was analyzed by physico-chemical and spectroscopic methods reported in the literature. The physicochemical analysis results confirmed that the structure of the complex was distorted octahedral. The antimicrobial activities of these substrates such as ketone, oxime and its copper complex were investigated using Bauer-Kirby disc diffusion technique against several antimicrobes by measuring the mm of zones of inhibitions. Further these activities were concluded using drug dilution method. From the analysis report, the copper (II) complex of the oxime shows significant antimicrobial activities against their antimicrobial stains. The oxime shows moderate antimicrobial activity. The ketone shows satisfactory antibacterial and antifungal activities against their stains in both disc diffusion and drug dilution methods.
Źródło:
World Scientific News; 2019, 123; 124-140
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The dilution effect on the extinction of wall diffusion flame
Autorzy:
Ghiti, N.
Powiązania:
https://bibliotekanauki.pl/articles/240526.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flame
N2 Dilution
wall flame
infrared thermography
methane
płomień
termografia w podczerwieni
metan
azot
Opis:
The dynamic process of the interaction between a turbulent jet diffusion methane flame and a lateral wall was experimentally studied. The evolution of the flame temperature field with the Nitrogen dilution of the methane jet flame was examined. The interaction between the diffusion flame and the lateral wall was investigated for different distance between the wall and the central axes of the jet flame. The dilution is found to play the central role in the flame extinction process. The flame response as the lateral wall approaches from infinity and the increasing of the dilution rate make the flame extinction more rapid than the flame without dilution, when the nitrogen dilution rate increase the flame temperature decrease.
Źródło:
Archives of Thermodynamics; 2014, 35, 4; 43-54
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unplanned dilution prediction in open stope mining: developing new design charts using Artificial Neural Network classifier
Autorzy:
Korigov, Sultan
Adoko, Amoussou Coffi
Sengani, Fhatuwani
Powiązania:
https://bibliotekanauki.pl/articles/2201390.pdf
Data publikacji:
2022
Wydawca:
Główny Instytut Górnictwa
Tematy:
open stope
dilution graph
stope overbreak
neural network classifier
system otwartych komór
klasyfikator sieci neuronowej
Opis:
Minimizing dilution is essential in open stope mine design as excessive unplanned dilution can compromise the operation's profitability. One of the main challenges associated with the empirical dilution graph method used to design open stopes is how to determine the boundary of the dilution zones objectively. Hence, this paper explores the implementation of machine learning classifiers to bridge this gap in the conventional dilution graph method. Stope performance data consisting of the stope dilution (unplanned dilution), the modified stability number, and the hydraulic radius were compiled from a mine located in Kazakhstan. First, the conventional dilution graph methods were used to assess the dilution. Next, a Feed-Forward Neural Network (FFNN) classifier was implemented to predict each level of dilution. Overall, the FFNN results indicated that 97% of the stope surfaces were correctly classified, indicating an excellent classification performance, while the conventional dilution graph method did not show a good performance. In addition, the outputs of the FFNN were used to plot new dilution graphs with a probabilistic interpretation illustrating its practicability. It was concluded that the FFNN-based classifier could be a useful tool for open stope design in underground mines.
Źródło:
Journal of Sustainable Mining; 2022, 21, 2; 157--168
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
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