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Wyświetlanie 1-10 z 38
Tytuł:
Gehrings lemma for metrics and higher integrability of the gradient for minimizers of noncoercive variational functionals
Autorzy:
Franchi, Bruno
Serra Cassano, Francesco
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Powiązania:
https://bibliotekanauki.pl/articles/1287346.pdf  Link otwiera się w nowym oknie
Opis:
We prove a higher integrability result - similar to Gehring's lemma - for the metric space associated with a family of Lipschitz continuous vector fields by means of sub-unit curves. Applications are given to show the higher integrability of the gradient of minimizers of some noncoercive variational functionals.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Théorie générale de lélimination
Autorzy:
Francesco Faà di Bruno (bł.; 1825-1888)
Wydawca:
Leiber et Faraguet
Opis:
S. Dickstein [piecz.]
Gabinet Matematyczny Towarzystwa Naukowego Warszawskiego [stamp in the front page and inside the book]
Gabinet Matematyczny Towarzystwa Naukowego Warszawskiego [piecz. na s. tyt. i wew.]
Contains signatures [handwr.]
S. Dickstein [stamp]
Towarzystwo Naukowe Warszawskie [stamp in the front page and inside the book]
Zawiera podpisy [rkps]
Towarzystwo Naukowe Warszawskie [piecz. na s. tyt. i wew.]
IX, [1], 224 p. : il., err. ; 24 cm
IX, [1], 224 s. : il., err. ; 24 cm
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part I Theoretical background
Autorzy:
Aguirre, Jedidiah Joel
Rubino, Bruno
Vassallo, Maurizio
Di Giulio, Giuseppe
Visini, Francesco
Tematy:
non-ergodic probabilistic seismic hazard analysis
physics-based ground motion prediction
modified time-weakening friction law
peak ground acceleration
hazard curve
City of L’Aquila
analiza zagrożeń sejsmicznych
przewidywanie ruchu naziemnego
zmodyfikowane prawo tarcia
szczytowe przyspieszenie naziemne
krzywa zagrożenia
L'aquila
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/2035834.pdf  Link otwiera się w nowym oknie
Opis:
A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part II Methodology
Autorzy:
Aguirre, Jedidiah Joel
Rubino, Bruno
Vassallo, Maurizio
Di Giulio, Giuseppe
Visini, Francesco
Tematy:
non-ergodic probabilistic seismic hazard analysis
physics-based ground motion prediction
modified time-weakening friction law
peak ground acceleration
hazard curve
City of L’Aquila
analiza zagrożeń sejsmicznych
przewidywanie ruchu naziemnego
zmodyfikowane prawo tarcia
szczytowe przyspieszenie naziemne
krzywa zagrożenia
L'aquila
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/2035843.pdf  Link otwiera się w nowym oknie
Opis:
A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Appendices
Autorzy:
Aguirre, Jedidiah Joel
Rubino, Bruno
Vassallo, Maurizio
Di Giulio, Giuseppe
Visini, Francesco
Tematy:
non-ergodic probabilistic seismic hazard analysis
physics-based ground motion prediction
modified time-weakening friction law
peak ground acceleration
hazard curve
City of L’Aquila
analiza zagrożeń sejsmicznych
przewidywanie ruchu naziemnego
zmodyfikowane prawo tarcia
szczytowe przyspieszenie naziemne
krzywa zagrożenia
L'aquila
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/2035851.pdf  Link otwiera się w nowym oknie
Opis:
A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy
Autorzy:
Aguirre, Jedidiah Joel
Rubino, Bruno
Vassallo, Maurizio
Di Giulio, Giuseppe
Visini, Francesco
Tematy:
non-ergodic probabilistic seismic hazard analysis
physics-based ground motionprediction
modified time-weakening friction law
peak ground acceleration
hazard curve
City of L’Aquila
analiza zagrożeń sejsmicznych
przewidywanie ruchu naziemnego
zmodyfikowane prawo tarcia
szczytowe przyspieszenie naziemne
krzywa zagrożenia
L'aquila
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/1950802.pdf  Link otwiera się w nowym oknie
Opis:
A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-ergodic probabilistic seismic hazard methodology using physics-based ground motion prediction: the case of LAquila, Italy - Part III Results and Discussion
Autorzy:
Aguirre, Jedidiah Joel
Rubino, Bruno
Vassallo, Maurizio
Di Giulio, Giuseppe
Visini, Francesco
Tematy:
non-ergodic probabilistic seismic hazard analysis
physics-based ground motion prediction
modified time-weakening friction law
peak ground acceleration
hazard curve
City of L’Aquila
analiza zagrożeń sejsmicznych
przewidywanie ruchu naziemnego
zmodyfikowane prawo tarcia
szczytowe przyspieszenie naziemne
krzywa zagrożenia
L'aquila
Pokaż więcej
Wydawca:
Politechnika Gdańska
Powiązania:
https://bibliotekanauki.pl/articles/2035849.pdf  Link otwiera się w nowym oknie
Opis:
A non-ergodic probabilistic seismic hazard analysis (PSHA) utilizing the physics-based ground motion prediction was proposed in this study to minimize the increasing uncertainties in the use of empirical equations. The City of L’Aquila in Italy was used for illustrative purposes due to the availability of data and the historical seismicity of the site. A total of 28 seismic sources were identified in this study located within a 100 km radius from the city. Fault properties such as geometry and location were obtained from the literature, while the fault occurrence rates were obtained using the FiSH Code. A modified time-weakening friction law was proposed to model the seismic energy released by an earthquake. Uncertainties in different rupture scenarios were characterized through the Guttenberg-Richter Relations and the Characteristic Brownian Time Passage. Uncertainties in distances were characterized through probability mass functions, which were used to calculate the ground motion exceedance probabilities. The 1D elastodynamic equation coupled with the Hooke’s law was used to predict the peak ground acceleration (PGA), a measure of the ground shaking level. A hazard curve, which is a plot of PGA and its recurrence, was constructed and compared with the results of the study of Valentini, et al., AGU 100: Advancing Earth and Space Science (2019). The method proposed in this study predicts a higher hazard rates for PGAs less than 0.70 g, which implies that the ground motion was overestimated for very far sources. In contrast, lower hazard curves were observed for PGAs greater than 0.70g which can be attributed to fewer seismic sources considered in this study.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ability of eight frailty instruments to identify adverse outcomes across different settings : the FRAILTOOLS project
Autorzy:
Rodriguez-Laso, Angel
Landi, Francesco
Gryglewska, Barbara
Carnicero, Jose Antonio
Checa-Lopez, Marta
Vellas, Bruno
Oviedo-Briones, Myriam
Rodriguez Artalejo, Fernando
Sinclair, Alan J.
Rodriguez-Manas, Leocadio
Opis:
Background: To compare the performance of eight frailty instruments to identify relevant adverse outcomes for older people across different settings over a 12 month follow-up. Methods: Observational longitudinal prospective study of people aged 75 + years enrolled in different settings (acute geriatric wards, geriatric clinic, primary care clinics, and nursing homes) across five European cities. Frailty was assessed using the following: Frailty Phenotype, SHARE-FI, 5-item Frailty Trait Scale (FTS-5), 3-item FTS (FTS-3), FRAIL scale, 35-item Frailty Index (FI-35), Gérontopôle Frailty Screening Tool, and Clinical Frailty Scale. Adverse outcomes ascertained at follow-up were as follows: falls, hospitalization, increase in limitation in basic (BADL) and instrumental activities of daily living (IADL), and mortality. Sensitivity, specificity, and capacity to predict adverse outcomes in logistic regressions by each instrument above age, gender, and multimorbidity were calculated. Results: A total of 996 individuals were followed (mean age 82.2 SD 5.5 years, 61.3% female). In geriatric wards, the FI-35 (69.1%) and the FTS-5 (67.9%) showed good sensitivity to predict death and good specificity to predict BADL worsening (70.3% and 69.8%, respectively). The FI-35 also showed good sensitivity to predict BADL worsening (74.6%). In nursing homes, the FI-35 and the FTSs predicted mortality and BADL worsening with a sensitivity > 73.9%. In geriatric clinic, the FI-35, the FTS-5, and the FRAIL scale obtained specificities > 85% to predict BADL worsening. No instrument achieved high enough sensitivity nor specificity in primary care. All the instruments predict the risk for all the outcomes in the whole sample after adjusting for age, gender, and multimorbidity. The associations of these instruments that remained significant by setting were for BADL worsening in geriatric wards [FI-35 OR = 5.94 (2.69–13.14), FTS-3 = 3.87 (1.76–8.48)], nursing homes [FI-35 = 4.88 (1.54–15.44), FTS-5 = 3.20 (1.61–6.38), FTS-3 = 2.31 (1.27–4.21), FRAIL scale = 1.91 (1.05–3.48)], and geriatric clinic [FRAIL scale = 4.48 (1.73–11.58), FI-35 = 3.30 (1.55–7.00)]; for IADL worsening in primary care [FTS-5 = 3.99 (1.14–13.89)] and geriatric clinic [FI-35 = 3.42 (1.56–7.49), FRAIL scale = 3.27 (1.21–8.86)]; for hospitalizations in primary care [FI-35 = 3.04 (1.25–7.39)]; and for falls in geriatric clinic [FI-35 = 2.21 (1.01–4.84)]. Conclusions: No single assessment instrument performs the best for all settings and outcomes. While in inpatients several commonly used frailty instruments showed good sensitivities (mainly for mortality and BADL worsening) but usually poor specificities, the contrary happened in geriatric clinic. None of the instruments showed a good performance in primary care. The FI-35 and the FTS-5 showed the best profile among the instruments assessed.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 38

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