Littérature scientifique sur le sujet « 02-GEO »
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Articles de revues sur le sujet "02-GEO"
1
Li, G., X. Tang, X. Gao, J. P. Huang, J. Chen et J. Lu. « POINTING ANGLE CALIBRATION OF ZY3-02 SATELLITE LASER ALTIMETER USING TERRAIN MATCHING ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1/W1 (31 mai 2017) : 205–10. http://dx.doi.org/10.5194/isprs-archives-xlii-1-w1-205-2017.
Texte intégralRésumé :
After GLAS (Geo-science Laser Altimeter System) loaded on the ICESat (Ice Cloud and land Elevation Satellite), satellite laser altimeter attracts more and more attention. ZY3-02 equipped with the Chinese first satellite laser altimeter has been successfully launched on 30<sup>th</sup> May, 2016. The geometric calibration is an important step for the laser data processing and application. The method to calculate the laser pointing angle error based on existed reference terrain data is proposed in this paper. The public version terrain data, such as 90m-SRTM and 30m-AW3D30, can be used to estimate the pointing angle of laser altimeter. The GLAS data with simulated pointing error and actual ZY3-02 laser altimetry data is experimented to validate the algorithm. The conclusion will be useful for the future domestic satellite laser altimeter.
2
Chen, X., L. Zhang, Y. Wang, R. Li, M. Yang et L. Gao. « Identification of key target genes and pathway analysis in nonalcoholic fatty liver disease via integrated bioinformatics analysis ». Balkan Journal of Medical Genetics 25, no 1 (1 juin 2022) : 25–34. http://dx.doi.org/10.2478/bjmg-2022-0006.
Texte intégralRésumé :
Abstract Purpose This study aimed at exploring the mechanisms underlying nonalcoholic fatty liver disease (NAFLD) and developing new diagnostic biomarkers for nonalcoholic steatohepatitis (NASH). Methods The microarray dataset GES83452 was downloaded from the NCBI-GEO database, and the differentially expressed RNAs (DERs) were screened between the NAFLD and non-NAFLD samples of the baseline and 1-year follow-up time point group based on the Limma package. Results A total of 561 DERs (268 downregulated and 293 upregulated) were screened in the baseline time point group, and 1163 DERs (522 downregulated and 641 upregulated) were screened in the 1-year follow-up time point group. A total of 74 lncRNA–miRNA pairs and 523 miRNA–mRNA pairs were obtained in order to construct a lncRNA–miRNA–mRNA regulatory network. Subsequently, functional enrichment analysis revealed 28 GO and 9 KEGG pathways in the ceRNA regulatory network. LEPR and CXCL10 are involved in the Cytokine–cytokine receptor interaction (P = 1.86E-02), and the FOXO1 is involved in both the insulin signaling pathway (P = 1.79E-02) and the pathways in cancer (P = 2.87E-02). Conclusion LEPR, CXCL10, and FOXO1 were the characteristic target genes for NAFLD.
3
Xie, Guangqi, Mi Wang, Zhiqi Zhang, Shao Xiang et Luxiao He. « Near Real-Time Automatic Sub-Pixel Registration of Panchromatic and Multispectral Images for Pan-Sharpening ». Remote Sensing 13, no 18 (14 septembre 2021) : 3674. http://dx.doi.org/10.3390/rs13183674.
Texte intégralRésumé :
This paper presents a near real-time automatic sub-pixel registration method of high-resolution panchromatic (PAN) and multispectral (MS) images using a graphics processing unit (GPU). In the first step, the method uses differential geo-registration to enable accurate geographic registration of PAN and MS images. Differential geo-registration normalizes PAN and MS images to the same direction and scale. There are also some residual misalignments due to the geometrical configuration of the acquisition instruments. These residual misalignments mean the PAN and MS images still have deviations after differential geo-registration. The second step is to use differential rectification with tiny facet primitive to eliminate possible residual misalignments. Differential rectification corrects the relative internal geometric distortion between PAN and MS images. The computational burden of these two steps is large, and traditional central processing unit (CPU) processing takes a long time. Due to the natural parallelism of the differential methods, these two steps are very suitable for mapping to a GPU for processing, to achieve near real-time processing while ensuring processing accuracy. This paper used GaoFen-6, GaoFen-7, ZiYuan3-02 and SuperView-1 satellite data to conduct an experiment. The experiment showed that our method’s processing accuracy is within 0.5 pixels. The automatic processing time of this method is about 2.5 s for 1 GB output data in the NVIDIA GeForce RTX 2080Ti, which can meet the near real-time processing requirements for most satellites. The method in this paper can quickly achieve high-precision registration of PAN and MS images. It is suitable for different scenes and different sensors. It is extremely robust to registration errors between PAN and MS.
4
Wood, AO, Dan, et Jeffrey Hedenquist. « Mineral Exploration : Discovering and Defining Ore Deposits ». SEG Discovery, no 116 (1 janvier 2019) : 1–22. http://dx.doi.org/10.5382/geo-and-mining-02.
Texte intégralRésumé :
Editor’s note: The Geology and Mining series, edited by Dan Wood and Jeffrey Hedenquist, is designed to introduce early-career professionals and students to a variety of topics in mineral exploration, development, and mining, in order to provide insight into the many ways in which geoscientists contribute to the mineral industry. Abstract For economic geologists, mineral exploration has a specific objective: the discovery of mineral concentrations that can be recovered economically to provide resources essential for society. This was achieved consistently until the first decade of the current century, but exploration since then has been wealth destructive. This outcome is a major issue for the mining industry unless reversed. We believe the technologies presently used to discover ore deposits will be as useful in making future discoveries as they were previously. However, we argue that a new approach is required in how exploration is conducted and in how these and emerging technologies are applied. The required changes in approach include improved business models for conducting exploration and acceptance that fewer deposits are likely to be discovered near the surface. We argue that discovery of deeper deposits will be facilitated if exploration teams (1) seek to identify subtle evidence of mineralized rock recognizable within 500 m of the surface, (2) conduct follow-up investigations with a clear understanding of the volumetric dimensions of the discovery target, and (3) drill boldly as a critical exploration tool. We propose that improving the way geoscientists think when exploring—being more predictive—is the immediate key to increasing the number of discoveries.
5
Jaafar, Juliana Rosmidah, Sheau Tsuey Chong, Khadijah Alavi et Balan Rathakrishnan. « Pemahaman identiti diri daripada perspektif penderma darah ulangan berkala ». Malaysian Journal of Society and Space 13, no 3 (29 août 2017) : 11–18. http://dx.doi.org/10.17576/geo-2017-1303-02.
Texte intégral
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Mahmud, Abdul Rahman, Zaini Sakawi et Khairul Nizam Abdul Maulud. « Analisa terhadap kaedah pengulasan laporan Penilaian Kesan kepada Alam Sekeliling di Malaysia ». Malaysian Journal of Society and Space 13, no 4 (30 novembre 2017) : 11–21. http://dx.doi.org/10.17576/geo-2017-1304-02.
Texte intégral
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Ishak, Suraiya, Ahmad Raflis Che Omar, Fahruddin Mustafa Al Bakri et Lokhman Hakim Osman. « Amalan pembelajaran dan kesannya terhadap pembentukan pengetahuan serta kemahiran perniagaan dalam kalangan Generasi Z ». Malaysian Journal of Society and Space 14, no 1 (28 février 2018) : 15–28. http://dx.doi.org/10.17576/geo-2018-1401-02.
Texte intégral
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Mahmud, Mastura, et Nur Hidayah Ahmad. « Peristiwa El Nino, keragaman hujan dan potensi Southern Oscillation Index untuk peramalan kualiti udara di Malaysia ». Malaysian Journal of Society and Space 14, no 2 (29 mai 2018) : 13–25. http://dx.doi.org/10.17576/geo-2018-1402-02.
Texte intégral
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Abdul Aziz, Nik Norazira. « Intimacy in marital relationship : Effect of internet usage ». Malaysian Journal of Society and Space 14, no 3 (27 août 2018) : 14–23. http://dx.doi.org/10.17576/geo-2018-1403-02.
Texte intégral
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Hari Singh, Nirmal Kaur, Lai Wei Sieng et Mohd Nasir Mohd Saukani. « Impact of education levels on economic growth in Malaysia : A gender base analysis ». Malaysian Journal of Society and Space 14, no 4 (22 novembre 2018) : 13–26. http://dx.doi.org/10.17576/geo-2018-1404-02.
Texte intégralThèses sur le sujet "02-GEO"
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D’Oriano, Filippo <1980>. « Geological and Structural evolution of the Eurasia Africa plate boundary in the Gulf of Cadiz Central Eastern Atlantic Sea ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2982/1/Doriano_tesi_dott.pdf.
Texte intégralRésumé :
Iberia Africa plate boundary, cross, roughly W-E, connecting the eastern Atlantic Ocean from Azores triple junction to the Continental margin of Morocco. Relative movement between the two plate change along the boundary, from transtensive near the Azores archipelago, through trascurrent movement in the middle at the Gloria Fracture Zone, to transpressive in the Gulf of Cadiz area. This study presents the results of geophysical and geological analysis on the plate boundary area offshore Gibraltar. The main topic is to clarify the geodynamic evolution of this area from Oligocene to Quaternary. Recent studies have shown that the new plate boundary is represented by a 600 km long set of aligned, dextral trascurrent faults (the SWIM lineaments) connecting the Gloria fault to the Riff orogene. The western termination of these lineaments crosscuts the Gibraltar accretionary prism and seems to reach the Moroccan continental shelf.
In the past two years newly acquired bathymetric data collected in the Moroccan offshore permit to enlighten the present position of the eastern portion of the plate boundary, previously thought to be a diffuse plate boundary.
The plate boundary evolution, from the onset of compression in the Oligocene to the Late Pliocene activation of trascurrent structures, is not yet well constrained. The review of available seismics lines, gravity and bathymetric data, together with the analysis of new acquired bathymetric and high resolution seismic data offshore Morocco, allows to understand how the deformation acted at lithospheric scale under the compressive regime. Lithospheric folding in the area is suggested, and a new conceptual model is proposed for the propagation of the deformation acting in the brittle crust during this process. Our results show that lithospheric folding, both in oceanic and thinned continental crust, produced large wavelength synclines bounded by short wavelength, top thrust, anticlines. Two of these anticlines are located in the Gulf of Cadiz, and are represented by the Gorringe Ridge and Coral Patch seamounts. Lithospheric folding probably interacted with the Monchique – Madeira hotspot during the 72 Ma to Recent, NNE – SSW transit. Plume related volcanism is for the first time described on top of the Coral Patch seamount, where nine volcanoes are found by means of bathymetric data. 40Ar-39Ar age of 31.4±1.98 Ma are measured from one rock sample of one of these volcanoes. Analysis on biogenic samples show how the Coral Patch act as a starved offshore seamount since the Chattian. We proposed that compression stress formed lithospheric scale structures playing as a reserved lane for the upwelling of mantle material during the hotspot transit. The interaction between lithospheric folding and the hotspot emplacement can be also responsible for the irregularly spacing, and anomalous alignments, of individual islands and seamounts belonging to the Monchique - Madeira hotspot.
2
D’Oriano, Filippo <1980>. « Geological and Structural evolution of the Eurasia Africa plate boundary in the Gulf of Cadiz Central Eastern Atlantic Sea ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2982/.
Texte intégralRésumé :
Iberia Africa plate boundary, cross, roughly W-E, connecting the eastern Atlantic Ocean from Azores triple junction to the Continental margin of Morocco. Relative movement between the two plate change along the boundary, from transtensive near the Azores archipelago, through trascurrent movement in the middle at the Gloria Fracture Zone, to transpressive in the Gulf of Cadiz area. This study presents the results of geophysical and geological analysis on the plate boundary area offshore Gibraltar. The main topic is to clarify the geodynamic evolution of this area from Oligocene to Quaternary. Recent studies have shown that the new plate boundary is represented by a 600 km long set of aligned, dextral trascurrent faults (the SWIM lineaments) connecting the Gloria fault to the Riff orogene. The western termination of these lineaments crosscuts the Gibraltar accretionary prism and seems to reach the Moroccan continental shelf.
In the past two years newly acquired bathymetric data collected in the Moroccan offshore permit to enlighten the present position of the eastern portion of the plate boundary, previously thought to be a diffuse plate boundary.
The plate boundary evolution, from the onset of compression in the Oligocene to the Late Pliocene activation of trascurrent structures, is not yet well constrained. The review of available seismics lines, gravity and bathymetric data, together with the analysis of new acquired bathymetric and high resolution seismic data offshore Morocco, allows to understand how the deformation acted at lithospheric scale under the compressive regime. Lithospheric folding in the area is suggested, and a new conceptual model is proposed for the propagation of the deformation acting in the brittle crust during this process. Our results show that lithospheric folding, both in oceanic and thinned continental crust, produced large wavelength synclines bounded by short wavelength, top thrust, anticlines. Two of these anticlines are located in the Gulf of Cadiz, and are represented by the Gorringe Ridge and Coral Patch seamounts. Lithospheric folding probably interacted with the Monchique – Madeira hotspot during the 72 Ma to Recent, NNE – SSW transit. Plume related volcanism is for the first time described on top of the Coral Patch seamount, where nine volcanoes are found by means of bathymetric data. 40Ar-39Ar age of 31.4±1.98 Ma are measured from one rock sample of one of these volcanoes. Analysis on biogenic samples show how the Coral Patch act as a starved offshore seamount since the Chattian. We proposed that compression stress formed lithospheric scale structures playing as a reserved lane for the upwelling of mantle material during the hotspot transit. The interaction between lithospheric folding and the hotspot emplacement can be also responsible for the irregularly spacing, and anomalous alignments, of individual islands and seamounts belonging to the Monchique - Madeira hotspot.
3
Giambastiani, Beatrice Maria Sole <1978>. « Evoluzione idrologica ed idrogeologica della pineta di San Vitale (Ravenna) ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/291/1/Dottorato_Giambastiani_XIXCICLO.pdf.
Texte intégral
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Giambastiani, Beatrice Maria Sole <1978>. « Evoluzione idrologica ed idrogeologica della pineta di San Vitale (Ravenna) ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/291/.
Texte intégral
5
dalla, Valle Giacomo <1977>. « Dinamica sedimentaria torbiditica in bacini confinati : margine orientale della Sardegna ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/454/1/Tesi__Dottorato_Dalla_Valle_Giacomo.pdf.
Texte intégralRésumé :
La sedimentazione clastica di mare profondo è attualmente uno dei principali argomenti della ricerca sedimentologica sia in ambito puramente accademico che in ambito petrolifero-industriale. Gli studi recenti hanno enfatizzato l'influenza fondamentale della topografia preesistente del fondo marino sulla crescita e la morfologia sui fan di mare profondo; si è visto come, in molti systemi torbiditici,
l’evoluzione dei processi deposizionali sia stata da moderatamente a fortemente controllata dall’ effetto di confinamento di scarpate tettoniche, ridge strutturali e
seamounts. Scopo di questo lavoro è studiare l'effetto del confinamento alla scala di bacino sui principali sistemi torbiditici del margine orientale della Sardegna che
rappresenta un margine passivo articolato di bacini di intraslope confinati verso mare da seamounts. Lo studio dei sistemi deposizionali è stato eseguito attraverso l'interpretazione di dati di batimetria multibeam ad alto dettaglio acquisiti dall’ISMAR di Bologna durante la crociera Tir99. L’ interpretazione multibeam è stata
integrata con l’ analisi di profili sismici a riflessione per comprendere la morfologia l’organizzazione interna e l’evoluzione nel tempo dei principali elementi deposizionali dei sistemi torbiditici. Tre bacini di intraslope (Olbia, Baronie e il settore settentrionale del bacino Ogliastra) sono stati investigati. Il bacino di Olbia è il bacino più settentrionale del margine orientale della Sardegna ed è limitato verso mare dai seamount Etruschi e Baronie. Il principale sistema torbiditico del bacino di Olbia è costituito dal Caprera, articolato in un sistema di canyon alimentatori nella piattaforma e nella scarpata continentale e da un ampio canale con argini alla base della scarpata. Il Caprera è fiancheggiato da un ampia piattaforma continentale, e questa, fungendo da “magazzino” per il materiale piu grossolando, può spiegare la peculiare architettura sedimentaria del suo fan. L'effetto di confinamento del bacino sulla forma e sull'evoluzione del fan del Caprera è evidente soprattutto sull'asimmetria dei leve e su fenomeni di avulsione che hanno coinvolto il canale. Il bacino di intraslope di Olbia appare completamente riempito, e, nel bordo orientale, è presente il canyon di intrabacino verso il bacino sottostante. Gli effetti dell'abbassamento del livello di base sono
visibili nel settore distale del sistema, dove si ha lo sviluppo di canali distributari e di valli erosive a basso rilievo, che rappresentano le porzioni "upslope" dei canyon di "bypass". Il bacino di intraslope del Baronie è il bacino centrale del margine, confinato verso mare dal seamount delle Baronie, e presenta una via di fuga laterale rappresentato dal sistema di canyon di Gonone-Orosei. Il Posada è il sistema torbiditico principale, consiste di un canyon profondamente inciso nella piattaforma e nella scarpata, e sviluppa alla base della scarpata un piccolo fa radiale. La morfologia del è il risultato dell'interazione complessa tra la geoemtria del bacino ricevente ed il
comportamento dei flussi sedimentari. La forma del bacino ha costretto il sistema torbiditico a cambiare la direzione di sviluppo, da est verso sud. Processi di framanento in massa a grande scala hanno inoltre contribuito alla riorganizzazione del sistema torbiditico. Il bacino dell’Ogliastra è localizzato nel settore meridionale del margine, limitato verso mare dal seamount Quirra. Il settore settentrionale della scarpata continentale del bacino Ogliastra è caratterizzato da canyon e incisioni di carattere ibrido, con tratti deposizionali ed erosivi. L'Arbatax è il principale sistema torbiditico del bacino di Ogliastra caratterizzato da un settore meridionale dominato da un canale alimentatore e da un settore settentrionale abbandonato, caratterizzato da fenomeni di smantellamento e instabilità gravitativa. In generale i risultati dello studio evidenziano l'importanza della combinazione dei
fattori di controllo esterni, e della topografia preesistente, nello sviluppo dei processi sedimentari e degli elementi deposizionali dei sistemi torbiditici. In
particolare, appare evidente come lo stile deposizionale dei sistemi torbiditici in ambiente confinato diverga sostanzialmente da quello previsto dai modelli di fan
sottomarini usati come strumenti predittivi nella esplorazione e sfruttamento dei giacimenti di idrocarburi.
6
dalla, Valle Giacomo <1977>. « Dinamica sedimentaria torbiditica in bacini confinati : margine orientale della Sardegna ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/454/.
Texte intégralRésumé :
La sedimentazione clastica di mare profondo è attualmente uno dei principali argomenti della ricerca sedimentologica sia in ambito puramente accademico che in ambito petrolifero-industriale. Gli studi recenti hanno enfatizzato l'influenza fondamentale della topografia preesistente del fondo marino sulla crescita e la morfologia sui fan di mare profondo; si è visto come, in molti systemi torbiditici,
l’evoluzione dei processi deposizionali sia stata da moderatamente a fortemente controllata dall’ effetto di confinamento di scarpate tettoniche, ridge strutturali e
seamounts. Scopo di questo lavoro è studiare l'effetto del confinamento alla scala di bacino sui principali sistemi torbiditici del margine orientale della Sardegna che
rappresenta un margine passivo articolato di bacini di intraslope confinati verso mare da seamounts. Lo studio dei sistemi deposizionali è stato eseguito attraverso l'interpretazione di dati di batimetria multibeam ad alto dettaglio acquisiti dall’ISMAR di Bologna durante la crociera Tir99. L’ interpretazione multibeam è stata
integrata con l’ analisi di profili sismici a riflessione per comprendere la morfologia l’organizzazione interna e l’evoluzione nel tempo dei principali elementi deposizionali dei sistemi torbiditici. Tre bacini di intraslope (Olbia, Baronie e il settore settentrionale del bacino Ogliastra) sono stati investigati. Il bacino di Olbia è il bacino più settentrionale del margine orientale della Sardegna ed è limitato verso mare dai seamount Etruschi e Baronie. Il principale sistema torbiditico del bacino di Olbia è costituito dal Caprera, articolato in un sistema di canyon alimentatori nella piattaforma e nella scarpata continentale e da un ampio canale con argini alla base della scarpata. Il Caprera è fiancheggiato da un ampia piattaforma continentale, e questa, fungendo da “magazzino” per il materiale piu grossolando, può spiegare la peculiare architettura sedimentaria del suo fan. L'effetto di confinamento del bacino sulla forma e sull'evoluzione del fan del Caprera è evidente soprattutto sull'asimmetria dei leve e su fenomeni di avulsione che hanno coinvolto il canale. Il bacino di intraslope di Olbia appare completamente riempito, e, nel bordo orientale, è presente il canyon di intrabacino verso il bacino sottostante. Gli effetti dell'abbassamento del livello di base sono
visibili nel settore distale del sistema, dove si ha lo sviluppo di canali distributari e di valli erosive a basso rilievo, che rappresentano le porzioni "upslope" dei canyon di "bypass". Il bacino di intraslope del Baronie è il bacino centrale del margine, confinato verso mare dal seamount delle Baronie, e presenta una via di fuga laterale rappresentato dal sistema di canyon di Gonone-Orosei. Il Posada è il sistema torbiditico principale, consiste di un canyon profondamente inciso nella piattaforma e nella scarpata, e sviluppa alla base della scarpata un piccolo fa radiale. La morfologia del è il risultato dell'interazione complessa tra la geoemtria del bacino ricevente ed il
comportamento dei flussi sedimentari. La forma del bacino ha costretto il sistema torbiditico a cambiare la direzione di sviluppo, da est verso sud. Processi di framanento in massa a grande scala hanno inoltre contribuito alla riorganizzazione del sistema torbiditico. Il bacino dell’Ogliastra è localizzato nel settore meridionale del margine, limitato verso mare dal seamount Quirra. Il settore settentrionale della scarpata continentale del bacino Ogliastra è caratterizzato da canyon e incisioni di carattere ibrido, con tratti deposizionali ed erosivi. L'Arbatax è il principale sistema torbiditico del bacino di Ogliastra caratterizzato da un settore meridionale dominato da un canale alimentatore e da un settore settentrionale abbandonato, caratterizzato da fenomeni di smantellamento e instabilità gravitativa. In generale i risultati dello studio evidenziano l'importanza della combinazione dei
fattori di controllo esterni, e della topografia preesistente, nello sviluppo dei processi sedimentari e degli elementi deposizionali dei sistemi torbiditici. In
particolare, appare evidente come lo stile deposizionale dei sistemi torbiditici in ambiente confinato diverga sostanzialmente da quello previsto dai modelli di fan
sottomarini usati come strumenti predittivi nella esplorazione e sfruttamento dei giacimenti di idrocarburi.
7
Minisini, Daniel <1978>. « Mass-transport deposits on Mediterranean continental margins ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/455/1/tesiMinisini.pdf.
Texte intégralRésumé :
Extensive mass transport deposits and multiple slide scars testify widespread and recurrent submarine sediment failures occurring during the late Quaternary on the SW-Adriatic and SE-Sicilian margins. These mass movements and their consequences contributed to shape the continental slopes and fill the basins with characteristic signatures. Geomorphological, seismo-stratigraphic, sedimentological and
biostratigraphic data provide clues to: 1) define distinct failure mechanisms investigating on factors that determine dissimilar organization of coeval displaced masses, 2) reconstruct successive phases of failure stressing on the same location where slide scars crosscut and mass-transport deposits overlap, 3) analyze regional setting and indicate the most suitable place where to calculate mass wasting
frequency. Discussions on the role of fluid flow, currents activity and tectonic deformation determine a wider view on the construction of the studied continental margins.
8
Minisini, Daniel <1978>. « Mass-transport deposits on Mediterranean continental margins ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/455/.
Texte intégralRésumé :
Extensive mass transport deposits and multiple slide scars testify widespread and recurrent submarine sediment failures occurring during the late Quaternary on the SW-Adriatic and SE-Sicilian margins. These mass movements and their consequences contributed to shape the continental slopes and fill the basins with characteristic signatures. Geomorphological, seismo-stratigraphic, sedimentological and
biostratigraphic data provide clues to: 1) define distinct failure mechanisms investigating on factors that determine dissimilar organization of coeval displaced masses, 2) reconstruct successive phases of failure stressing on the same location where slide scars crosscut and mass-transport deposits overlap, 3) analyze regional setting and indicate the most suitable place where to calculate mass wasting
frequency. Discussions on the role of fluid flow, currents activity and tectonic deformation determine a wider view on the construction of the studied continental margins.
9
Stecchi, Francesco <1977>. « Tuzla City (BiH) : an example of geohazard induced by salt extraction ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1033/1/Tesi_Stecchi_Francesco.pdf.
Texte intégralRésumé :
Salt deposits characterize the subsurface of Tuzla (BiH) and made it famous since the ancient
times. Archeological discoveries demonstrate the presence of a Neolithic pile-dwelling settlement
related to the existence of saltwater springs that contributed to make the most of the area a swampy
ground.
Since the Roman times, the town is reported as “the City of Salt deposits and Springs”; "tuz"
is the Turkish word for salt, as the Ottomans renamed the settlement in the 15th century following
their conquest of the medieval Bosnia (Donia and Fine, 1994). Natural brine springs were located
everywhere and salt has been evaporated by means of hot charcoals since pre-Roman times.
The ancient use of salt was just a small exploitation compared to the massive salt production
carried out during the 20th century by means of classical mine methodologies and especially wild
brine pumping.
In the past salt extraction was practised tapping natural brine springs, while the modern
technique consists in about 100 boreholes with pumps tapped to the natural underground brine runs,
at an average depth of 400-500 m. The mining operation changed the hydrogeological conditions
enabling the downward flow of fresh water causing additional salt dissolution.
This process induced severe ground subsidence during the last 60 years reaching up to 10
meters of sinking in the most affected area. Stress and strain of the overlying rocks induced the
formation of numerous fractures over a conspicuous area (3 Km2). Consequently serious damages
occurred to buildings and infrastructures such as water supply system, sewage networks and power
lines.
Downtown urban life was compromised by the destruction of more than 2000 buildings that
collapsed or needed to be demolished causing the resettlement of about 15000 inhabitants (Tatić,
1979).
Recently salt extraction activities have been strongly reduced, but the underground water
system is returning to his natural conditions, threatening the flooding of the most collapsed area.
During the last 60 years local government developed a monitoring system of the phenomenon,
collecting several data about geodetic measurements, amount of brine pumped, piezometry,
lithostratigraphy, extension of the salt body and geotechnical parameters. A database was created
within a scientific cooperation between the municipality of Tuzla and the city of Rotterdam (D.O.O.
Mining Institute Tuzla, 2000).
The scientific investigation presented in this dissertation has been financially supported by a
cooperation project between the Municipality of Tuzla, The University of Bologna (CIRSA) and the
Province of Ravenna. The University of Tuzla (RGGF) gave an important scientific support in
particular about the geological and hydrogeological features.
Subsidence damage resulting from evaporite dissolution generates substantial losses
throughout the world, but the causes are only well understood in a few areas (Gutierrez et al., 2008).
The subject of this study is the collapsing phenomenon occurring in Tuzla area with the aim
to identify and quantify the several factors involved in the system and their correlations.
Tuzla subsidence phenomenon can be defined as geohazard, which represents the
consequence of an adverse combination of geological processes and ground conditions precipitated
by human activity with the potential to cause harm (Rosenbaum and Culshaw, 2003).
Where an hazard induces a risk to a vulnerable element, a risk management process is
required.
The single factors involved in the subsidence of Tuzla can be considered as hazards. The final
objective of this dissertation represents a preliminary risk assessment procedure and guidelines,
developed in order to quantify the buildings vulnerability in relation to the overall geohazard that
affect the town.
The historical available database, never fully processed, have been analyzed by means of
geographic information systems and mathematical interpolators (PART I).
Modern geomatic applications have been implemented to deeply investigate the most relevant
hazards (PART II). In order to monitor and quantify the actual subsidence rates, geodetic GPS
technologies have been implemented and 4 survey campaigns have been carried out once a year.
Subsidence related fractures system has been identified by means of field surveys and
mathematical interpretations of the sinking surface, called curvature analysis. The comparison of
mapped and predicted fractures leaded to a better comprehension of the problem. Results confirmed
the reliability of fractures identification using curvature analysis applied to sinking data instead of
topographic or seismic data.
Urban changes evolution has been reconstructed analyzing topographic maps and satellite
imageries, identifying the most damaged areas. This part of the investigation was very important for
the quantification of buildings vulnerability.
10
Stecchi, Francesco <1977>. « Tuzla City (BiH) : an example of geohazard induced by salt extraction ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1033/.
Texte intégralRésumé :
Salt deposits characterize the subsurface of Tuzla (BiH) and made it famous since the ancient
times. Archeological discoveries demonstrate the presence of a Neolithic pile-dwelling settlement
related to the existence of saltwater springs that contributed to make the most of the area a swampy
ground.
Since the Roman times, the town is reported as “the City of Salt deposits and Springs”; "tuz"
is the Turkish word for salt, as the Ottomans renamed the settlement in the 15th century following
their conquest of the medieval Bosnia (Donia and Fine, 1994). Natural brine springs were located
everywhere and salt has been evaporated by means of hot charcoals since pre-Roman times.
The ancient use of salt was just a small exploitation compared to the massive salt production
carried out during the 20th century by means of classical mine methodologies and especially wild
brine pumping.
In the past salt extraction was practised tapping natural brine springs, while the modern
technique consists in about 100 boreholes with pumps tapped to the natural underground brine runs,
at an average depth of 400-500 m. The mining operation changed the hydrogeological conditions
enabling the downward flow of fresh water causing additional salt dissolution.
This process induced severe ground subsidence during the last 60 years reaching up to 10
meters of sinking in the most affected area. Stress and strain of the overlying rocks induced the
formation of numerous fractures over a conspicuous area (3 Km2). Consequently serious damages
occurred to buildings and infrastructures such as water supply system, sewage networks and power
lines.
Downtown urban life was compromised by the destruction of more than 2000 buildings that
collapsed or needed to be demolished causing the resettlement of about 15000 inhabitants (Tatić,
1979).
Recently salt extraction activities have been strongly reduced, but the underground water
system is returning to his natural conditions, threatening the flooding of the most collapsed area.
During the last 60 years local government developed a monitoring system of the phenomenon,
collecting several data about geodetic measurements, amount of brine pumped, piezometry,
lithostratigraphy, extension of the salt body and geotechnical parameters. A database was created
within a scientific cooperation between the municipality of Tuzla and the city of Rotterdam (D.O.O.
Mining Institute Tuzla, 2000).
The scientific investigation presented in this dissertation has been financially supported by a
cooperation project between the Municipality of Tuzla, The University of Bologna (CIRSA) and the
Province of Ravenna. The University of Tuzla (RGGF) gave an important scientific support in
particular about the geological and hydrogeological features.
Subsidence damage resulting from evaporite dissolution generates substantial losses
throughout the world, but the causes are only well understood in a few areas (Gutierrez et al., 2008).
The subject of this study is the collapsing phenomenon occurring in Tuzla area with the aim
to identify and quantify the several factors involved in the system and their correlations.
Tuzla subsidence phenomenon can be defined as geohazard, which represents the
consequence of an adverse combination of geological processes and ground conditions precipitated
by human activity with the potential to cause harm (Rosenbaum and Culshaw, 2003).
Where an hazard induces a risk to a vulnerable element, a risk management process is
required.
The single factors involved in the subsidence of Tuzla can be considered as hazards. The final
objective of this dissertation represents a preliminary risk assessment procedure and guidelines,
developed in order to quantify the buildings vulnerability in relation to the overall geohazard that
affect the town.
The historical available database, never fully processed, have been analyzed by means of
geographic information systems and mathematical interpolators (PART I).
Modern geomatic applications have been implemented to deeply investigate the most relevant
hazards (PART II). In order to monitor and quantify the actual subsidence rates, geodetic GPS
technologies have been implemented and 4 survey campaigns have been carried out once a year.
Subsidence related fractures system has been identified by means of field surveys and
mathematical interpretations of the sinking surface, called curvature analysis. The comparison of
mapped and predicted fractures leaded to a better comprehension of the problem. Results confirmed
the reliability of fractures identification using curvature analysis applied to sinking data instead of
topographic or seismic data.
Urban changes evolution has been reconstructed analyzing topographic maps and satellite
imageries, identifying the most damaged areas. This part of the investigation was very important for
the quantification of buildings vulnerability.
Livres sur le sujet "02-GEO"
1
None. Nat Geo Adult Fall 02 Catalog. National Geographic, 2002.
Trouver le texte intégral
2
None. Nat Geo Children'S Fall 02 Catalog. National Geographic, 2002.
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3
Haynes, John. Toyota Corolla and Geo/Chev Prizm Auto Repair Manual 93-02. Haynes Manuals, Inc., 2002.
Trouver le texte intégralChapitres de livres sur le sujet "02-GEO"
1
FAGUNDES, D. A. « A VIOLÊNCIA CONTRA AS MINORIAS REPRODUZIDA NAS PÁGINAS DOS JORNAIS CAPIXABAS ». Dans GEOGRAFIA : SOCIEDADE, POPULAÇÕES E NATUREZA, 30–48. Arco Editores, 2021. http://dx.doi.org/10.48209/geo-65-89949-02-3.
Texte intégral
2
Shabeykin, Alexander, Alexey Gulyukin, Vladislav Belimenko et Mikhail Gulyukin. « Analysis and assessment of risks of natural focal zoonotic infections outbreaks using geo-information technologies ». Dans Science-based epidemiological control system and modern methods of diagnosis, specific prevention and treatment of infectious diseases in domestic animals, 68–79. АНС «СибАК», 2019. http://dx.doi.org/10.31016/rg.2.2.22203.77607-02.
Texte intégral
3
Gulch, Eberhard. « 3D Modelling of Urban Environment ». Dans Environmental Information Systems in Industry and Public Administration, 25–40. IGI Global, 2001. http://dx.doi.org/10.4018/978-1-930708-02-0.ch003.
Texte intégralRésumé :
Sustainability and protection of the environment are requirements of high priority in our society. These tasks need an efficient monitoring of the environment. The information gathered should be accurate and up-to-date for all kinds of decision making, planning, simulation and analysis. All environmental information systems are data-hungry and once established require continuous maintenance to keep track of changes in the physical environment. The built-environment is obviously one of the most interesting areas, with regular changes and constant need for updated information. An out-of-date database is arguably worse than having no database because of the false sense of certainty it carries. If there is no database, model etc. then at least users are aware of their lack of information and cannot rely on inaccurate data. In the context of these topics we are using the term ‘environment’ to denote the urban physical structures. We do not regard in this chapter applications related to the physical environment as it expresses itself in terms of different forms of pollution, e.g. noise, emissions, etc. Examples for those are given in several of the other chapters. We regard those applications as potential users of geo-spatial information on the built-up area of a city.
Actes de conférences sur le sujet "02-GEO"
1
Bodechtel, Johann, Jochen Henkel, Qingxia Lei et Gerhard Loercher. « Geo-scientific evaluation and future aspects of MOMS-02 ». Dans Spatial Information from Digital Photogrammetry and Computer Vision : ISPRS Commission III Symposium, sous la direction de Heinrich Ebner, Christian Heipke et Konrad Eder. SPIE, 1994. http://dx.doi.org/10.1117/12.182838.
Texte intégral
2
Ali Mahmud, Othman, Irdawati Lokman, Shamsudin Jirin et Thang X.Tran. « Sequence Stratigraphic Approach to Identify Potential Stratigraphic Plays in Matured Blocks 01/02,Offshore Vietnam ». Dans GEO 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.248.287.
Texte intégral
3
Anna SHIDLOVSKAYA et Jean-Louis BRIAUD. « MODERN SYLLABUS FOR INTRODUCTION TO GEOTECHNICAL ENGINEERING ». Dans IV International Conference on Geo-Engineering Education. London, UK : International Society for Soil Mechanics and Geotechnical Engineering - ISSMGE, 2016. http://dx.doi.org/10.20906/cps/sfge-02-0001.
Texte intégral
4
Zhang, R., X. Tang, X. Yu, J. Li et Y. Zhao. « Impact of Ozone Post Oxidation to the Electrical Properties of HfO2/Al2O3/GeOx/Ge pMOSFETs ». Dans 2016 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2016. http://dx.doi.org/10.7567/ssdm.2016.o-1-02.
Texte intégral