Multimedia-PCs für telekooperatives Arbeiten

Jäger, Michael

doi:10.1007/978-3-642-60874-2

Cited by 2 publications

(3 citation statements)

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“…Therefore the erosion rate due to rock falls and rock slides in the last 145 years is calculated to be 0.25 mm/year. This figure is in good agreement with the estimate of 0.22 mm/year ± 27% computed by Jäger (1997) for Yosemite Valley cliffs during the last 15 000 years. Figure 3b also shows that the cumulative curve of landslide volume is strongly dominated by the largest events, particularly by a rock fall of 600 000 m 3 caused by an unrecognised trigger on 10 March 1987.…”

Section: Frequency Of Rock Fallssupporting

confidence: 91%

“…eroded) by rock falls or rock slides. This corresponds to a yearly erosion rate of about 10 140 m 3 /year, comparable with the erosion rate of 18 900 m 3 /year computed by Jäger (1997) for the last 15 000 years, based on the evaluation of the size of the alluvial and rock talus cones (Wieczorek and Jäger, 1996). Considering a terrain steeper than 45 • as a possible source of rock falls and correcting for the terrain gradient, one can estimate that rock cliffs in the Yosemite Valley have an area of at least 40 km 2 .…”

Section: Frequency Of Rock Fallssupporting

confidence: 75%

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Rockfall hazard and risk assessment in the Yosemite Valley, California, USA

Guzzetti

Reichenbach

Wieczorek

2003

Nat. Hazards Earth Syst. Sci.

240

182

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Abstract. Rock slides and rock falls are the most frequent types of slope movements in Yosemite National Park, California. In historical time 392 rock falls and rock slides have been documented in the valley, and some of them have been mapped in detail. We present the results of an attempt to assess rock fall hazards in the Yosemite Valley. Spatial and temporal aspects of rock falls hazard are considered. A detailed inventory of slope movements covering the 145-year period from 1857 to 2002 is used to determine the frequency-volume statistics of rock falls and to estimate the annual frequency of rock falls, providing the temporal component of rock fall hazard. The extent of the areas potentially subject to rock fall hazards in the Yosemite Valley were obtained using STONE, a physically-based rock fall simulation computer program. The software computes 3-dimensional rock fall trajectories starting from a digital elevation model (DEM), the location of rock fall release points, and maps of the dynamic rolling friction coefficient and of the coefficients of normal and tangential energy restitution. For each DEM cell the software calculates the number of rock falls passing through the cell, the maximum rock fall velocity and the maximum flying height. For the Yosemite Valley, a DEM with a ground resolution of 10×10 m was prepared using topographic contour lines from the U.S. Geological Survey 1:24 000-scale maps. Rock fall release points were identified as DEM cells having a slope steeper than 60 • , an assumption based on the location of historical rock falls. Maps of the normal and tangential energy restitution coefficients and of the rolling friction coefficient were produced from a surficial geologic map. The availability of historical rock falls mapped in detail allowed us to check the computer program performance and to calibrate the model parameters. Visual and statistical comparison of the model results with the mapped rock falls confirmed the accuracy of the model. The model results are compared with a previous map of rockfall talus and with a geomorphic assessment of rock fall hazard based on potential energy referred to as a shadow angle approach, Correspondence to: F. Guzzetti (F.Guzzetti@irpi.cnr.it) recently completed for the Yosemite Valley. The model results are then used to identify the roads and trails more subject to rock fall hazard. Of the 166.5 km of roads and trails in the Yosemite Valley 31.2% were found to be potentially subject to rock fall hazard, of which 14% are subject to very high hazard.

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Section: Frequency Of Rock Fallssupporting

confidence: 91%

Section: Frequency Of Rock Fallssupporting

confidence: 75%

Rockfall hazard and risk assessment in the Yosemite Valley, California, USA

Guzzetti

Reichenbach

Wieczorek

2003

Nat. Hazards Earth Syst. Sci.

240

182

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“…As a research team, our experience in adapting tests to Spanish comes mainly from German and North American tests. Among the former, the Berliner Intelligenzstrukturmodell (Jäger, 1982; Kleine & Jäger, 1987; Rosas, 1990; Süß & Beauducel, 2005), the Mathematische Rechenkonzepte (Marko-D, Fritz et al, 2017; Rosas & Espinoza, in preparation), and the Leseverständnistest für Elementarschüler (ELFE-II, Lenhard et al, 2017; Rosas, Escobar, and Espinoza, in preparation) stand out. Among the latter, we have the Wechsler scales for children and adults WISC-III (Ramírez & Rosas, 2007), WISC-V (Rosas, Pizarro, et al, 2022; Wechsler, 2014), WAIS-IV (Rosas et al, 2014; Wechsler, 2008), and the Hearts and Flowers Test for measuring executive functions in children (Davidson et al, 2006; Diamond, 2013; Rosas, Espinoza, et al, 2022).…”

Section: Each Spanish-speaking Country Is Different Even In Speechmentioning

confidence: 99%

10 Things You Should Not Forget When Adapting a Test Into Spanish

Rosas,

Pizarro,

Espinoza

2024

Psychological Test Adaptation and Development

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Adapting a test from one language to another is no easy task. The literal translation of the items is certainly not enough since the meanings and references change from one language to another. In the case of Spanish adaptations, the problem becomes even more complex, as there are many varieties of Spanish, almost as many as Spanish-speaking countries. This article presents 10 tips for adapting tests to Spanish regarding the morphological, syntactic, and pragmatic elements that should be considered when adapting an instrument to Spanish. These tips are based on experience with the adaptation of various instruments, such as the Wechsler Intelligence Scales (WISC-III, WAIS-IV, and WISC-V) and the Big Five from English, and the ELFE scale, MARKO-D, and the Berlin Intelligence Test from German.

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Multimedia-PCs für telekooperatives Arbeiten

Cited by 2 publications

References 0 publications

Rockfall hazard and risk assessment in the Yosemite Valley, California, USA

Rockfall hazard and risk assessment in the Yosemite Valley, California, USA

10 Things You Should Not Forget When Adapting a Test Into Spanish

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