Autor: Zygmunt, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Assessment of continental hydrosphere loading using GNSS measurements
Autorzy:: Zygmunt, M.
Rajner, M.
Liwosz, T.
Powiązania:: https://bibliotekanauki.pl/articles/106899.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:: load Love numbers
Green's functions
WGHM
GNSS
crustal deformation
liczby Love'a
parametry sprężystości Ziemi
funkcja Greena
deformacja skorupy
Opis:: Presented paper is dedicated to problems of deformation of the Earth's crust as a response to the surface loading caused by continental waters. The aim of this study was to specify areas particularly vulnerable to studied deformation and to compare calculated and observed displacements. Information of the continental water volume was taken from the WaterGAP Global Hydrological Model. Calculated values of the deformations were verified with the results obtained with programs SPOTL and grat. Vertical deformations were almost 10 times higher than the deformation in the horizontal plane, for which reason later part of the paper focuses on the former. In order to check agreement of the calculated and observed deformation 23 stations of International GNSS Service (IGS) were selected and divided into three groups (inland, near the shoreline and islands). Before comparison outliers and discontinuities were removed from GNSS observations. Modelled and observed signals were centred. The analysed time series of the vertical displacements showed that only for the inland stations it is possible to effectively remove displacements caused by mass transfer in the hydrosphere. For stations located in the coastal regions or islands, it is necessary to consider additional movement effects resulting from indirect ocean tidal loading or atmosphere loading.
Źródło:: Reports on Geodesy and Geoinformatics; 2016, 101; 36-53
2391-8365
2391-8152
Pojawia się w:: Reports on Geodesy and Geoinformatics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Magnesium - an important component of high-energy compositions
Magnez - istotny składnik mieszanin wysokoenergetycznych
Autorzy:: Zygmunt, A.
Cieslak, K.
Golofit, T.
Powiązania:: https://bibliotekanauki.pl/articles/14046.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Magnesium is a widely used component in high-energy compositions. Mixtures containing this metal can be found in show and military pyrotechnics, rocket propellants and various explosive masses. Magnesium containing compositions have high combustion temperature, which allows one to achieve the desired special effect. Two important stages in designing new high-energy mixtures, i.e. compatibility of substances and optimal composition, were described. The calculations were based on mixtures containing magnesium. In line with the standard STANAG 4147, using differential scanning calorimetry, compatibilities of mixtures of magnesium with octogen (HMX) and magnesium with hekzaazahekzanitroizowurzitane (CL-20) were examined. Magnesium is compatible with these nitroamines. An optimal composition which ensures the maximum combustion temperature and specific impulse was determined using the calculation programme isp2001. The optimum composition of the Mg : HMX composition burns at a lower temperature than the Mg : CL-20 mixture. The combustion temperature was 3493K for the former mixture and 3807K for the latter one. The specific impulse determined for both compositions was 273s. The specific impulse was established for mixtures with different shares of magnesium. The mixture containing in octogen reached the maximum specific impulse at 5% Mg, while the mixture containing CL-20 reached the highest specific impulse at 15% of this metal. The dependence of the specific impulse of rocket propellant containing polybutadiene with terminal hydroxyl groups (HTPB), ammonium perchlorate and magnesium was examined. The maximum value of the impulse increases with a decreasing amount of the binder. When another binder such as for poly(glycidyl azide) (GAP) was used, a reverse relationship was observed. The specific impulse increased with an increased binder content. The influence of various oxidants on the combustion temperature of pyrotechnic mixtures was defined. The highest combustion temperature was achieved for compositions with the magnesium content in the range of 20 to 45%. The effect on combustion temperature of the oxidants polytetrafluoroethylene, potassium chlorate and iron oxide was compared.
Źródło:: Journal of Elementology; 2014, 19, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modelling and Verification of Solid Propellant Rocket Motor Operation
Autorzy:: Zygmunt, B.
Surma, Z.
Leciejewski, Z.
Motyl, K.
Rasztabiga, T.
Powiązania:: https://bibliotekanauki.pl/articles/358193.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: modelling of rocket motor operation
ballistic parameters
experimental verification
Opis:: This paper presents a mathematical-physical model of phenomena occurring in the combustion chamber of a new solid propellant rocket motor. Due to the fact that the geometrical shape of the propellant grain has already been elaborated, the proposal for the modelling of combustion gas generation is a novelty. To solve the system of equations associated with the mathematical model, a computer programme in Turbo Pascal 7.0 was developed. For the solution of ordinary first-order differential equations, the fourth-order Runge-Kutta numerical method was applied. The main results of the completed simulations, i.e. changes in gas pressure, p, in the combustion chamber, and the rocket motor thrust, R, as a function of time, t, of motor operation, are shown graphically. Experimental verification of the parameters of the designed motor shows good agreement with the numerically calculated parameters.
Źródło:: Central European Journal of Energetic Materials; 2016, 13, 4; 944-956
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application and properties of aluminum in primary and secondary explosives
Autorzy:: Zygmunt, A.
Gańczyk, K.
Kasztankiewicz, A.
Cieślak, K.
Gołofit, T.
Powiązania:: https://bibliotekanauki.pl/articles/1190129.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: aluminum
primary explosives
secondary explosives
detonation parameters
Opis:: Aluminum is an easily available and cheap material, which is widely used in military and civil industries, e.g. in space technology, explosion welding, mining, production of oil and natural gas, manufacture of airbags. Primary and secondary explosives containing aluminum are described in this part of the work. Aluminum is added to high explosives of different shapes and sizes. These parameters influence inter alia detonation velocity (D), explosion heat, detonation pressure, pressure impulse and thermal stability. Detonation parameters of high explosive (HE) containing aluminum have been determined for binary systems consisting of high explosive or oxidizer and aluminum, plastic bonded explosives (PBX), melt cast explosives, thermobaric explosives (TBX), ammonium nitrate fuel oil (ANFO). Aluminum causes different effects on detonation velocity and explosion heat depending on the type of high explosive in binary systems. The dependence of the aluminum content in a mixture with ammonium nitrate with detonation velocity increased for an aluminum range from 0 to 10%, changed little between 10 and 16% of aluminum added and decreased from 16 to 40% of the aluminum content. For an aluminum content higher than 40%, the detonation process was not observed. The performance of explosives can be determined by the shock wave intensity. An increase in the pressure impulse made Al particle react with gaseous products and the air behind the front of detonation wave. The addition of aluminum also influences the thermal stability of high explosive materials.
Źródło:: Journal of Elementology; 2017, 22, 2; 747-759
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of the possibility to apply airborne and terrestrial laser scanning in protecting areas of natura 2000
Analiza możliwości zastosowania naziemnego i lotniczego skaningu laserowego w ochronie obszarów natura 2000
Autorzy:: Gawronek, P.
Mitka, B.
Noszczyk, T.
Pluta, M.
Zygmunt, M.
Powiązania:: https://bibliotekanauki.pl/articles/47342.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Opis:: The Natura 2000 network is a fundamental element of EU policy in the field of nature protection and the example of Europe’s enormous efforts to preserve biodeversity for future generations. Detailed principles of conduct in Natura 2000 areas are determined separately for each area and recorded in the plans for protection tasks. Planning effective action, and particularly identifying specific treatment of acitve protection requires monitoring and assessment of the conservation status of the natural environment and its factors. This paper is an analysis of the application of technology of airborne and terrestrial laser scanning in this context. Research carried out on a part of Natura 2000 area, Białka Valley (PLH120024), indicated that development conducted on point clouds allows for monitoring habitat enrichment, and supports the process of creating plans for protection tasks.
Sieć Natura 2000 to podstawowy element polityki Unii Europejskiej w dziedzinie ochrony przyrody i przykład ogromnego wysiłku Europy na rzecz zachowania różnorodności biologicznej dla przyszłych pokoleń. Szczegółowe zasady postępowania na obszarach Natura 2000 są ustalane odrębnie dla każdego terenu i zapisywane w planach zadań ochronnych (PZO). Planowanie efektywnych działań, a zwłaszcza wskazywanie konkretnych zabiegów ochrony czynnej wymaga monitoringu i oceny stanu zachowania środowiska przyrodniczego oraz jego czynników. Praca stanowi analizę możliwości zastosowania technologii naziemnego i lotniczego skaningu laserowego w tym zakresie. Prace badawcze przeprowadzone na fragmencie obszaru Natura 2000 „Dolina Białki” (PLH120024) dowiodły, że wykonane na chmurach punktów opracowania pozwalają na wzbogacenie monitoringu siedlisk przyrodniczych i wspomagają proces tworzenia planów zadań ochronnych.
Źródło:: Acta Scientiarum Polonorum. Agricultura; 2014, 13, 4
1644-0625
Pojawia się w:: Acta Scientiarum Polonorum. Agricultura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Application and properties of aluminum in primary and secondary explosives
Autorzy:: Zygmunt, A.
Gańczyk, K.
Kasztankiewicz, A.
Cieślak, K.
Gołofit, T.
Powiązania:: https://bibliotekanauki.pl/articles/963927.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Aluminum is an easily available and cheap material, which is widely used in military and civil industries, e.g. in space technology, explosion welding, mining, production of oil and natural gas, manufacture of airbags. Primary and secondary explosives containing aluminum are described in this part of the work. Aluminum is added to high explosives of different shapes and sizes. These parameters influence inter alia detonation velocity (D), explosion heat, detonation pressure, pressure impulse and thermal stability. Detonation parameters of high explosive (HE) containing aluminum have been determined for binary systems consisting of high explosive or oxidizer and aluminum, plastic bonded explosives (PBX), melt cast explosives, thermobaric explosives (TBX), ammonium nitrate fuel oil (ANFO). Aluminum causes different effects on detonation velocity and explosion heat depending on the type of high explosive in binary systems. The dependence of the aluminum content in a mixture with ammonium nitrate with detonation velocity increased for an aluminum range from 0 to 10%, changed little between 10 and 16% of aluminum added and decreased from 16 to 40% of the aluminum content. For an aluminum content higher than 40%, the detonation process was not observed. The performance of explosives can be determined by the shock wave intensity. An increase in the pressure impulse made Al particle react with gaseous products and the air behind the front of detonation wave. The addition of aluminum also influences the thermal stability of high explosive materials.
Źródło:: Journal of Elementology; 2017, 22, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Comparison of effectiveness of measuring concrete water dam with terrestrial laser scanners: RIEGL VZ-400, ZplusF IMAGER 5010
Autorzy:: Glowacka, A.
Noszczyk, T.
Zygmunt, M.
Gawronek, P.
Mitka, B.
Pluta, M.
Powiązania:: https://bibliotekanauki.pl/articles/62144.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: comparison
effectiveness
measurement
water dam
concrete condition
terrestrial laser scanner
monitoring
Opis:: In the span of the last ten years a major spur of evolution has occurred in the area of obtaining object spatial data. The range and form of spatial data are subject to constant technical evolution, and what comes with that – the possibilities and effectiveness of their computation rise. Terrestrial laser scanning, which is the basis for obtaining 3D data, is also a subject of constant innovation. Currently, manufacturers of terrestrial laser scanners offer a wide range of advanced measurement devices; their precision and efficiency fulfill the need of geodesic monitoring. The scientific research in this article is a comparative analysis of the application of two terrestrial laser scanners used in the measurement of a water dam in Rożnowo. The results of the comparison present the ability to compare the influence of the type of measurement device used on the results of a periodical measurement of water dams.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2014, IV/3
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application and properties of aluminum in rocket propellants and pyrotechnics
Autorzy:: Kasztankiewicz, A.
Ganczyk-Specjalska, K.
Zygmunt, A.
Cieslak, K.
Zakoscielny, B.
Golofit, T.
Powiązania:: https://bibliotekanauki.pl/articles/15933.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Theoretical analysis and optimization of 3D laser beam shaping
Autorzy:: Traczyk, M.
Wojtanowski, J.
Mierczyk, Z.
Zygmunt, M.
Knysak, P.
Drozd, T.
Muzal, M.
Powiązania:: https://bibliotekanauki.pl/articles/200923.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: laser beam shaping
optical aberrations
non-imaging optics
kształtowanie wiązki laserowej
aberracja optyczna
optyka bez obrazowania
Opis:: We report methodology of three-dimensional laser beam shaping. The analytical and numerical analysis is presented. A strategy for designing optical system involves the controlled application of aberrations which is realized by specific aspheric lens shaping. The goal is to obtain the desired optical power density distribution in space, which is optimal for selected application. The proposed method is discussed with regard to the design of optical transmitter for laser shooting simulator, however the developed methodology can be used for a number of other light shaping applications.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 555-560
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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