M. Paszkuta - Academia.edu (original) (raw)
Papers by M. Paszkuta
Słowa klucze-teledetekcja satelitarna, SatBałtyk Techniki satelitarne już chyba na dobre zadomowi... more Słowa klucze-teledetekcja satelitarna, SatBałtyk Techniki satelitarne już chyba na dobre zadomowiły się w naszym życiu codziennym. Wykorzystujemy je dzwoniąc telefonem komórkowym, oglądając telewizję, słuchając radia oraz bardziej lub mniej świadomie posługując się mapami cyfrowymi. Są stosowane w łączności i pozycjonowaniu samolotów, statków oraz obserwacji kosmosu. W naukach o Ziemi techniki satelitarne znajdują szczególną wartość jako kompleksowe źródło informacji. Teledetekcja satelitarna jest obecnie jedną z najprężniej rozwijających się dziedzin, które pomagają nam zrozumieć zarówno zjawiska zachodzące na naszej planecie jak i poza nią. Dlaczego obecnie kładzie się tak duży nacisk na rozwój teledetekcji przy użyciu satelitów? Przede wszystkim, jest to bardzo kompleksowe źródło informacji. Wyobraźmy sobie, że chcemy opracować mapę obrazującą rozkład przestrzenny temperatury wody w Morzu Bałtyckim dla danej pory roku. Można to zrobić tradycyjną metodą, tzn. popłynąć statkiem wyk...
Comptes Rendus Geoscience, 2006
ABSTRACT The coefficients that characterize the simultaneous transports of mass, heat, solute and... more ABSTRACT The coefficients that characterize the simultaneous transports of mass, heat, solute and current through compact clays are experimentally and theoretically determined. The role of a characteristic length scale that can be derived from conductivity and permeability is illustrated for the electrokinetic coefficients. The macroscopic Soret coefficient in clays was found five times larger than in the free fluid, presumably because of extra couplings with electrical phenomena. To cite this article: M. Paszkuta et al., C. R. Geoscience 338 (2006).
... 17 I.4.2.2 Etudes théoriques et numériques ..... ... 111 IV.3.3.2 Etude du pH ..... 113 IV.3.... more ... 17 I.4.2.2 Etudes théoriques et numériques ..... ... 111 IV.3.3.2 Etude du pH ..... 113 IV.3.3.3 Comparaison avec les résultats numériques ..... ...
International Applied Mechanics, 1993
Proper evaluation of seismic hazard depends on accurate estimates of potential earthquake size. I... more Proper evaluation of seismic hazard depends on accurate estimates of potential earthquake size. In areas with complex, multisegment fault systems, such an estimate in turn depends on an ability to predict the circumstances under which rupture may jump between fault segments. Many observational and numerical studies have analyzed the phenomenon of jumping rupture, but none has focused on how the process of rupture termination on the primary (nucleating) fault segment affects the ability of rupture to jump to a secondary fault segment. In the current study, I model the dynamics of a simple 2D strike-slip fault system with two parallel segments ar- ranged with either a compressional or extensional stepover. I vary the suddenness with which the initial shear stress tapers to zero on the primary section. If the initial shear stress goes to zero over a very small (100 m) distance, rupture readily jumps both compressional and extensional stepovers of 1 km. If the initial shear stress tapers to zero over 1 km, rupture can jump the compressional stepover, but not the exten- sional stepover. If the initial shear stress tapers to zero over 2.5 km, rupture cannot jump either the compressional or the extensional stepover. The results illustrate the importance of the slip gradient (and the resultant static stress field) and the accelera- tion of the rupture front (and the resultant generation of stopping phases) in determin- ing the probability of jumping rupture.
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness (on the basis of METEOSAT data) on the solar energy flux. The algorithm for satellite data assimilation involves the analysis of satellite images from the point of view of cloud identification and their classification with respect to light transmission. Solar energy input values measured at the Earth’s surface by traditional methods were used to calibrate and validate the model. Preliminary evaluation of the results indicates a substantial improvement in the accuracy of * The work is a part of a project supported by the Polish State Committee for Scientific Research (now the Ministry of Science and Higher Education) – grant No. PBZ–KBN 056/P04/2001. The complete text of the paper is available at http://www.iopan.gda.pl/oceanologia/ 12...
Oceanologia, 2008
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness ( ...
Journal of colloid and interface science, 2003
An experimental cell has been devised in order to measure the Soret coefficients in a compact cla... more An experimental cell has been devised in order to measure the Soret coefficients in a compact clay, namely argilite, when a concentration difference of a binary mixture is applied simultaneously with a temperature difference. Temperature gradients have been imposed in the same direction as concentration gradients or in the opposite one. The sign of the Soret coefficients is related to the respective direction of these gradients. Generally, mass transfer was found to be enhanced by the Soret effect. Experimental values of the Soret coefficient are given.
Journal of Colloid and Interface Science, 2003
An experimental cell has been devised in order to measure the Soret coefficients in a compact cla... more An experimental cell has been devised in order to measure the Soret coefficients in a compact clay, namely argilite, when a concentration difference of a binary mixture is applied simultaneously with a temperature difference. Temperature gradients have been imposed in the same direction as concentration gradients or in the opposite one. The sign of the Soret coefficients is related to the respective direction of these gradients. Generally, mass transfer was found to be enhanced by the Soret effect. Experimental values of the Soret coefficient are given.
Journal of Colloid and Interface Science, 2006
The macroscopic Soret coefficient S T was measured for three porous media, namely mica, glass pow... more The macroscopic Soret coefficient S T was measured for three porous media, namely mica, glass powder, and natural compact clay. At a mean temperature ofT = 25 • C and with NaCl, S T for mica and glass powder was found to be equal to (3.1 ± 0.7) × 10 −3 K −1 and close to values for a free medium in agreement with theoretical predictions which are obtained under the assumption that the pressure gradient and the electric field are negligible on the pore scale. The main result is that for clay S T was found five times larger, presumably because of extra couplings with electrical phenomena. This latter measurement was confirmed by an independent technique based on the membrane potential. (P.M. Adler).
Journal of Colloid and Interface Science, 2006
The membrane potential, the pressure difference, and the concentration difference induced by an a... more The membrane potential, the pressure difference, and the concentration difference induced by an applied concentration gradient through samples of compact clay were measured as functions of sodium chloride concentration and of porosity. The results of some previous numerical predictions are recalled to be functions of a characteristic length scale which can be derived from conductivity and permeability. Generally, the experimental data were in agreement with these numerical predictions. Therefore, nondiagonal coupling coefficients can be derived with acceptable precision from the diagonal coefficients.
Geophysical Research Letters, 2004
... Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean... more ... Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean and in geological reservoirs,. ... Slip history of the 2003 San Simeon earthquake constrained by combining 1-Hz GPS, strong motion, and teleseismic data,. ...
Oceanologia, 2008
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness ( ...
Słowa klucze-teledetekcja satelitarna, SatBałtyk Techniki satelitarne już chyba na dobre zadomowi... more Słowa klucze-teledetekcja satelitarna, SatBałtyk Techniki satelitarne już chyba na dobre zadomowiły się w naszym życiu codziennym. Wykorzystujemy je dzwoniąc telefonem komórkowym, oglądając telewizję, słuchając radia oraz bardziej lub mniej świadomie posługując się mapami cyfrowymi. Są stosowane w łączności i pozycjonowaniu samolotów, statków oraz obserwacji kosmosu. W naukach o Ziemi techniki satelitarne znajdują szczególną wartość jako kompleksowe źródło informacji. Teledetekcja satelitarna jest obecnie jedną z najprężniej rozwijających się dziedzin, które pomagają nam zrozumieć zarówno zjawiska zachodzące na naszej planecie jak i poza nią. Dlaczego obecnie kładzie się tak duży nacisk na rozwój teledetekcji przy użyciu satelitów? Przede wszystkim, jest to bardzo kompleksowe źródło informacji. Wyobraźmy sobie, że chcemy opracować mapę obrazującą rozkład przestrzenny temperatury wody w Morzu Bałtyckim dla danej pory roku. Można to zrobić tradycyjną metodą, tzn. popłynąć statkiem wyk...
Comptes Rendus Geoscience, 2006
ABSTRACT The coefficients that characterize the simultaneous transports of mass, heat, solute and... more ABSTRACT The coefficients that characterize the simultaneous transports of mass, heat, solute and current through compact clays are experimentally and theoretically determined. The role of a characteristic length scale that can be derived from conductivity and permeability is illustrated for the electrokinetic coefficients. The macroscopic Soret coefficient in clays was found five times larger than in the free fluid, presumably because of extra couplings with electrical phenomena. To cite this article: M. Paszkuta et al., C. R. Geoscience 338 (2006).
... 17 I.4.2.2 Etudes théoriques et numériques ..... ... 111 IV.3.3.2 Etude du pH ..... 113 IV.3.... more ... 17 I.4.2.2 Etudes théoriques et numériques ..... ... 111 IV.3.3.2 Etude du pH ..... 113 IV.3.3.3 Comparaison avec les résultats numériques ..... ...
International Applied Mechanics, 1993
Proper evaluation of seismic hazard depends on accurate estimates of potential earthquake size. I... more Proper evaluation of seismic hazard depends on accurate estimates of potential earthquake size. In areas with complex, multisegment fault systems, such an estimate in turn depends on an ability to predict the circumstances under which rupture may jump between fault segments. Many observational and numerical studies have analyzed the phenomenon of jumping rupture, but none has focused on how the process of rupture termination on the primary (nucleating) fault segment affects the ability of rupture to jump to a secondary fault segment. In the current study, I model the dynamics of a simple 2D strike-slip fault system with two parallel segments ar- ranged with either a compressional or extensional stepover. I vary the suddenness with which the initial shear stress tapers to zero on the primary section. If the initial shear stress goes to zero over a very small (100 m) distance, rupture readily jumps both compressional and extensional stepovers of 1 km. If the initial shear stress tapers to zero over 1 km, rupture can jump the compressional stepover, but not the exten- sional stepover. If the initial shear stress tapers to zero over 2.5 km, rupture cannot jump either the compressional or the extensional stepover. The results illustrate the importance of the slip gradient (and the resultant static stress field) and the accelera- tion of the rupture front (and the resultant generation of stopping phases) in determin- ing the probability of jumping rupture.
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness (on the basis of METEOSAT data) on the solar energy flux. The algorithm for satellite data assimilation involves the analysis of satellite images from the point of view of cloud identification and their classification with respect to light transmission. Solar energy input values measured at the Earth’s surface by traditional methods were used to calibrate and validate the model. Preliminary evaluation of the results indicates a substantial improvement in the accuracy of * The work is a part of a project supported by the Polish State Committee for Scientific Research (now the Ministry of Science and Higher Education) – grant No. PBZ–KBN 056/P04/2001. The complete text of the paper is available at http://www.iopan.gda.pl/oceanologia/ 12...
Oceanologia, 2008
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness ( ...
Journal of colloid and interface science, 2003
An experimental cell has been devised in order to measure the Soret coefficients in a compact cla... more An experimental cell has been devised in order to measure the Soret coefficients in a compact clay, namely argilite, when a concentration difference of a binary mixture is applied simultaneously with a temperature difference. Temperature gradients have been imposed in the same direction as concentration gradients or in the opposite one. The sign of the Soret coefficients is related to the respective direction of these gradients. Generally, mass transfer was found to be enhanced by the Soret effect. Experimental values of the Soret coefficient are given.
Journal of Colloid and Interface Science, 2003
An experimental cell has been devised in order to measure the Soret coefficients in a compact cla... more An experimental cell has been devised in order to measure the Soret coefficients in a compact clay, namely argilite, when a concentration difference of a binary mixture is applied simultaneously with a temperature difference. Temperature gradients have been imposed in the same direction as concentration gradients or in the opposite one. The sign of the Soret coefficients is related to the respective direction of these gradients. Generally, mass transfer was found to be enhanced by the Soret effect. Experimental values of the Soret coefficient are given.
Journal of Colloid and Interface Science, 2006
The macroscopic Soret coefficient S T was measured for three porous media, namely mica, glass pow... more The macroscopic Soret coefficient S T was measured for three porous media, namely mica, glass powder, and natural compact clay. At a mean temperature ofT = 25 • C and with NaCl, S T for mica and glass powder was found to be equal to (3.1 ± 0.7) × 10 −3 K −1 and close to values for a free medium in agreement with theoretical predictions which are obtained under the assumption that the pressure gradient and the electric field are negligible on the pore scale. The main result is that for clay S T was found five times larger, presumably because of extra couplings with electrical phenomena. This latter measurement was confirmed by an independent technique based on the membrane potential. (P.M. Adler).
Journal of Colloid and Interface Science, 2006
The membrane potential, the pressure difference, and the concentration difference induced by an a... more The membrane potential, the pressure difference, and the concentration difference induced by an applied concentration gradient through samples of compact clay were measured as functions of sodium chloride concentration and of porosity. The results of some previous numerical predictions are recalled to be functions of a characteristic length scale which can be derived from conductivity and permeability. Generally, the experimental data were in agreement with these numerical predictions. Therefore, nondiagonal coupling coefficients can be derived with acceptable precision from the diagonal coefficients.
Geophysical Research Letters, 2004
... Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean... more ... Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean and in geological reservoirs,. ... Slip history of the 2003 San Simeon earthquake constrained by combining 1-Hz GPS, strong motion, and teleseismic data,. ...
Oceanologia, 2008
A simple spectral model of solar energy input to the sea surface was extended to incorporate spac... more A simple spectral model of solar energy input to the sea surface was extended to incorporate space-borne data. The extension involved finding a method of determining aerosol optical thickness (on the basis of AVHRR data) and the influence of cloudiness ( ...