Browsing by Issue Date, starting with "2009"

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Access status: Metadata only ,
Elektroniczna technika pomiarowa
(2009) Bednarczyk, P.; Pilniewicz, M.
Wydział Geodezji Górniczej i Inżynierii Środowiska; Centrum e-Learningu i Innowacyjnej Dydaktyki
Treści zawarte na stronie mają pomóc studentom przyswoić wiedzę z przedmiotu Elektronicznych Technik Pomiarowych (ETP), który znajduje się w programie studiów kierunków geodezyjnych wszystkich wyższych uczelni w Polsce. Zawartość: <ul><li>Wykłady – znajdują się tu notatki z wykładów z przedmiotu ETP prowadzonych przez pana dr inż. Mieczysława Jóźwika, </li><li>Referaty – najlepsze z referatów studenckich, które powstały „na zamówienie” wspomnianego powyżej pana doktora, </li><li>Testy – każdy może sprawdzić stan swojej wiedzy z zakresu różnych tematów związanych z ETP, </li><li>Multimedia – animacje, ułatwiające zrozumienie sposobu działania niektórych instrumentów geodezyjnych oraz zasad działania laserów, </li><li>Inne – inne materiały, których nie sposób zakwalifikować do wcześniejszych działów (m.in. programy symulujące działanie niektórych instrumentów geodezyjnych oraz przydatne dokumenty). </ul>Strona brała udział w konkursie <a href="https://notatki.cel.agh.edu.pl/">„Notatki w Internecie”.</a>
Access status: Open Access ,
Badania laboratoryjne dyfuzji par węglowodorów w ośrodku gruntowym
(2009) Fąfara, Zbigniew; Mirkiewicz, Piotr
Numerical modelling of migration of oil contaminations in the ground aeration area requires accounting for a number of accompanying processes, out of which diffusion of hydrocarbon vapours in the porous space of the ground may be sometimes very important. This, however, requires cognition of a number of parameters of a mathematical model describing properties of the porous medium, migrating fluids and conditions of migration. The coefficient of diffusion of hydrocarbon vapours in ground is crucial for the correct description of diffusion. However, specialist literature does not give detailed figures, except for averages of diffusion coefficients which cannot be referred to specific types of the ground. This is connected with the hardly accessible uncertainty coefficient to the final results of calculations. Therefore, the Authors designed a laboratory post for analysing hydrocarbon vapours and performed measurements for four natural, specially selected different models of homogeneous ground medium. The prepared physical models represent grounds containing gravel and sand fractions: course, medium and fine sands. Pb-free ethyline was used as a source of hydrocarbon vapour. The obtained results have been discussed in the paper. In the future they may be used for construing a mathematical model enabling one to more precisely assess the coefficient of diffusion of hydrocarbon vapours in ground air, depending on the ground properties, especially its grain compositions.
Access status: Open Access ,
Cementy specjalne dla budownictwa podziemnego
(Wydawnictwa AGH, 2009) Szeląg, Henryk; Kurdowski, Wiesław
The paper describes properties of special cements and prepared concrete blends elaborated and produced in the Division of Mineral Building Materials in Cracow. Showed properties emphasize exceptional features of these materials which guarantee durability of constructions under extreme conditions of exploitation load and environmental effects. It concerns very high resistances, small porosity and advantageous pore size distribution, resistance to chemical corrosion, freeze resistance and controlled values of very low contraction and expansion for expansive concretes. These properties predispose above mentioned materials to accomplishment and repair of concrete constructions in road infrastructure building, especially in applications of underground construction as well as in constructions of mining industry.
Access status: Open Access ,
Ocena rozwoju niecki osiadań nad tunelem drążonym tarczą zmechanizowaną
(Wydawnictwa AGH, 2009) Kuszyk, Rafał; Siemińska-Lewandowska, Anna
The main problem of tunneling with use of TBM is to assign the range of subsiding trough and its influence on existing buildings and underground or road infrastructure. In the paper empirical methods of analysis of settlements due to TBM works and an example case are described.
Access status: Open Access ,
Zagrożenie i ochrona wód podziemnych w rejonie składowiska Żelazny Most - ocena oddziaływania na środowisko wodne
(Wydawnictwa AGH, 2009) Witczak, Stanisław; Duda, Robert
The flotation tailings dam threatens the water environment through saline water flow into two porous aquifers towards next streams and rivers. Spatial distribution of contaminated groundwater in 2000 year and prediction of shallow aquifer pollution about 2015 year are presented. Model computed balance of groundwater in 2000 year and the chlorides load carry out into tailings dam foregrounds are presented.
Access status: Open Access ,
Cyfrowe pośrednie sterowanie polowo zorientowane (IFOC) silnikiem indukcyjnym
(2009) Sieklucki, Grzegorz; Orzechowski, Tadeusz
Artykuł przedstawia metodykę rozwiązania problemu cyfrowego pośredniego sterowania połowo zorientowane (IFOC) silnikiem indukcyjnym i utworzenia praktycznego układu realizacji tego sterowania. W optymalizacji parametrycznej regulatora prędkości wykorzystano znormalizowane wielomiany Bessela. Omówiono strukturę układu sterowania cyfrowego. Zaprezentowane rozwiązanie oceniono przez przeprowadzenie odpowiednich eksperymentów obliczeniowych i symulacyjnych.
Access status: Open Access ,
Stan zagrożeń naturalnych w kopalniach węgla brunatnego ze szczególnym uwzględnieniem zagrożeń występujących w KWB »Bełchatów«
(Wydawnictwa AGH, 2009) Mirek, Adam; Biały, Leszek
In the paper reasons of main kinds of natural threats in Polish lignite mines and applied methods counteracting them, with special taking into consideration natural threats occurring in Lignite Mine »Bełchatów«, have been talked over. The greatest attention has been paid to geotechnic threat, which is potentially the most dangerous threat for continuity of activity of mine pits and the state of work safety. Some examples of events connected with individual kinds of threats have been showed. In summary, activities to continue and increase the state of safety towards natural threats occurring in lignite mines have been proposed.
Access status: Open Access ,
Walory i formy ochrony przyrody na Pogórzu Ciężkowickim
(Wydawnictwa AGH, 2009) Gruszka, Iwona
The animate and inanimate nature monuments of the Pogórze Ciężkowickie are described in this paper, according to general geographic and geological setting. One of the famous objects in the vicinity of Ciężkowice is »Rocky Town« Nature Reserve. Many type of tors occur in this area, which are mainly built by Ciężkowice Sandstones (Paleocene-Eocene), which belong to Silesian Nappe of the Outer Flysch Carpathians.
Access status: Open Access ,
Badania laboratoryjne nad zastosowaniem nowego kopolimeru kationowo-niejonowego do płuczek HDD
(2009) Wysocki, Sławomir; Bielewicz, Danuta; Wysocka, Marta
One of the most important in HDD technology is a drilling mud with specific properties. In this paper the results of cationic-nonionic copolymer KaCoPoli-3 application in drilling mud are presented. Tested mud characterize with good technological properties, it gives good perspectives of industrial development.
Access status: Restricted ,
Podstawy inżynierii biomedycznej. T. 1
(Wydawnictwa AGH, 2009) Tadeusiewicz, Ryszard; Augustyniak, Piotr
Access status: Open Access ,
Wyznaczanie przepuszczalności skał na podstawie pomiarów porozymetrycznych i magnetycznego rezonansu jądrowego
(Wydawnictwa AGH, 2009) Jarzyna, Jadwiga A.; Puskarczyk, Edyta
Permeability, the most important reservoir parameter can be directly measured only on rock samples. It can be also determined on the basis of various statistical relationships between petrophysical parameters. We tested usefulness of Swanson parameter from the mercury porosimetry and relaxation time T2 from the NMR to find adequate formulas to improve permeability determination. We used the Devonian carbonates and Carboniferous mudstones and the Rotliegend sandstones.
Access status: Open Access ,
Calibration of the strip yield model for fatigue crack growth predictions in structural steel
(Wydawnictwa AGH, 2009) Machniewicz, Tomasz
The paper is focused on the calibration of the strip yield (Dugdale) model for crack growth predictions for structural steel. This is achieved by imposing appropriate constraints on yielding the strip elements. To avoid a fortuitous, i.e. physically unjustified choice of the constraint factors, a novel concept for their selection is proposed, namely matching the experimentally observed and predicted by the model cyclic stress-strain behaviour at the crack tip. The approach is shown to yield satisfactory prediction results on crack growth under constant amplitude loading and after application of an overload cycle.
Access status: Open Access ,
Wstępne wyniki badań paleobotanicznych wiercenia Studzianna (trias-jura) z północnego obrzeżenia Gór Świętokrzyskich
(Wydawnictwa AGH, 2009) Barbacka, Maria; Feldman-Olszewska, Anna; Jarzynka, Agata; Krupnik, Joanna; Ociepa, Anna Maria; Wcisło-Luraniec, Elżbieta; Ziaja, Jadwiga
Studzianna well core (Triassic-Jurassic) from the Holy Cross Mts region were investigated. Fossil plants from the genus <i>Neocalamites</i> (Equisetales) were found mainly in the Triassic sediments. Fragments of Ginkgoales and Czekanowskiales and Coniferales were determined mainly from the Lower Jurassic. The Lower Jurassic microflora consists of sporomorphs from Bryophyta, Equisetales, Lycopodiales, Filicales from the family Cyatheaceae or Dicsoniaceae, Pteridospermophyta from Caytoniales, Ginkgoales or Cycadales or Bennettitales, Coniferales from the families Taxodiaceae, Pinaceae and Cheirolepidiaceae. Palynofacies have mainly terrestrial character and confirms earlier opinion (Karaszewski 1962, Pieńkowski 2004) of the prevailed terrestrial origin of the Lower Jurassic (Hettangian-Sinemurian) sediments from the Holy Cross Mts region.
Access status: Open Access ,
Okresy i stopy zwrotu nakładów inwestycyjnych w ocenie efektywności inwestycji rzeczowych
(2009) Michalski, Marek Ł.
W opracowaniu przedstawiono charakterystykę dwóch rodzajów metod oceny efektywności inwestycji rzeczowych: okresów i stóp zwrotu nakładów inwestycyjnych. Wskazano założenia, kryteria oceny i związane z nimi zalety i wady metod, których uwzględnienie jest niezbędne w celu podjęcia optymalnej decyzji inwestycyjnej.
Access status: Open Access ,
Wybrane problemy bilansowania produktów wzbogacania rud miedzi
(Wydawnictwa AGH, 2009) Foszcz, Dariusz; Niedoba, Tomasz; Tumidajski, Tadeusz
The adequate evaluation of feed separation into concentrate and waste is the crucial problem of mineral processing. The paper presents the analysis of copper ores, originating from Legnica and Głogów copper deposit area, beneficiation products balance. The errors of yields determination, which are the effect of improper sample collections, inexactness of chemical analyzes, as well of errors being the effect of products arising time shifts (which can be the highest ones) were taken into consideration. As the measures of the direct errors of chosen product yield estimation, the gradient vectors and its quadratic errors given by total differential method were applied. Then, by Grumbrecht method, the mean values of yields for the balanced period were calculated for minimization of the sums of increments Delta alpha, Delta betha and Delta v. The given results were compared and evaluated"," some of the possibilities of metal production calculations in industrial conditions were discussed.
Access status: Restricted ,
Rysunek techniczny jako zapis konstrukcji : zadania
(Wydawnictwa Naukowo-Techniczne, 2009) Rydzanicz, Igor
Access status: Open Access ,
Określenie ciśnienia złożowego metanu na podstawie pomiarów metanonośności oraz badań sorpcyjnych węgla na przykładzie KWK »Krupiński«
(Wydawnictwa AGH, 2009) Dutka, Barbara; Walaszczyk, Jan; Wierzbicki, Mirosław
The coal seam methane pressure seems to be a main parameter which is necessary for evaluating the probability of occurrence of some hazards in hard coal mine industry. An in situ measurement of this parametere is very difficult, so it was necessary to find an indirect method of such measurements. The laboratory method is generally based on the shape of the isotherm of the total methane content in the examined coal. The coal for the laboratory tests should be collected from a place in a coal bed where the methane content is well known. This paper presents an application of the worked out method to the estimation of the coal seam methane pressure level in the coal mine »Krupiński«.
Access status: Open Access ,
Multi-channel virtual-microphone feedback minimum-variance active noise control system
(Wydawnictwa AGH, 2009) Pawełczyk, Marek
Classical active noise control systems are designed to minimise, in a sense, the residual signal at the microphone providing information about acoustic noise and secondary sound interference. The secondary sound operates at the same time on the acoustic noise at other positions including user ears. In the worst case this can result in sound reinforcement at those positions. In many applications placing another microphone directly at the ears is not accepted. It is then justified to make efforts to design a dedicated system. The purpose is to minimise the mean-square value of the noise at the desired location while performing measurements of sound interference results at another location. This can be done by employing the general idea of Vrtual-Microphone Control systems. However, for many active noise control applications the use of a single pair of microphone and loudspeaker does not suffice to obtain satisfactory performance, i.e. generate a zone of quiet of acceptable dimensions. Moreover, for some applications, presence of an obstacle, e.g. the head in an active headrest system, constitutes a barrier for the zone of quiet at one side to propagate to the other side. Therefore, more microphones and loudspeakers are often necessary. In the most general case a coupling between subsequent pairs should be taken into account resulting in a multi-channel system. In previous papers of the author adaptive systems have been designed and analysed. In this paper a fixed parameter multi-channel Virtual-Microphone Control system, optimal in the mean- square sense, is designed. It includes non-minimum phase property of the system channels. Both the case of more inputs than outputs as well as the case of more outputs than inputs are considered. Factorization techniques have been used for the design. The system is verified by successfully controlling noise for the active headrest system.
Access status: Open Access ,
Pomiary porowatości skał metodą rentgenowskiej mikrotomografii komputerowej (Micro-CT)
(Wydawnictwa AGH, 2009) Dohnalik, Marek; Zalewska, Jadwiga
Roentgen computed microtomography is an imaging technique that generates high resolution 3D images of internal structure, basing on difference in X-rays absorption inside the sample. Micro-CT provides new possibilities to obtain up to few microns resolution images of reservoir rocks in non destructive way. Such images enables to visualize and quantitative analysis of mineral composition and pore structure (volume, shape and pore throat diameter), which can be used to better understanding petrophysical properties such as permeability. This paper shows test of direct, quantitative porosity measurement based on 3D images obtained using Benchtop device and AVIZO software.
Access status: Open Access ,
Wodny kierunek rekultywacji w KWB »Adamów« SA - inwestycją w przyszłość regionu
(Wydawnictwa AGH, 2009) Orlikowski, Dariusz; Szwed, Lilla
The report presents the problem of reclamation of terrains after lignite exploitation and is based on an example of KWB »Adamów« SA. It has been shown that water is more and more popular direction of reclamation. It describes three water basins built by the opencast mine. The report also includes further plans by KWB »Adamów« SA to build three other basins. The significance of the economic factor is highlighted as the major issue in the selection process of the reclamation method. The report concludes that there is a need to change the way of thinking when it comes to the reclamation process.