896 research outputs found
Experimental videos in scrutinizing multiphase shock flood wave over different downstream initial conditions
No full textExperimental videos:
Herein, 111 distinct video files have been presented which related to dam-break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). A clear water reservoir (without sediment) as well as 2 different sediment depths (0.03 and 0.075 m) were considered as initial upstream conditions to investigate multiphase flash flood characteristics. These 3 initial upstream conditions make the upstream reservoir 0% to 25% deposited with sedimentation (with respect to the total 30 cm height of the reservoir). Six different initial downstream conditions have also been considered. Semi-circular obstacles (‘humps’) of two different cross-sections (0.045 m or 0.075 m) were stiffly fixed to the bottom of the flume’s downstream bed and further fixed to the sides of the flume using rubber bands, 1 m downstream from the gate (dam). Dam-break scenarios in the smooth downstream bed (no obstacle) were used to acquire a basis of comparison for other downstream conditions. Additionally, wet-bed downstream conditions with three different standing water initial heights (0.02, 0.04 and 0.5 m) were considered as initial downstream conditions to investigate multiphase flash flood characteristics. Considering three cameras which covered length of the flume, 18 different dam break scenarios and 2 or 3 repetitions conducted for each test, a total of 111 videos collected from 37 distinct experiments which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 20 cm sediment depth (67.7% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 20 cm which makes the upstream reservoir 67.7% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 3 cm sediment depth (10% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 3 cm which makes the upstream reservoir 10% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 7.5 cm sediment depth (25% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 7.5 cm which makes the upstream reservoir 25% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 15 cm sediment depth (50% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 15 cm which makes the upstream reservoir 50% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 17.5 cm sediment depth (58.3% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 17.5 cm which makes the upstream reservoir 58.3% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 22 cm sediment depth (73.3% silted-up)
No full textExperimental videos:
Herein, 24 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 22 cm which makes the upstream reservoir 73.3% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 2 repetitions conducted for each test, a total of 24 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves in a reservoir with 24 cm sediment depth (80% silted-up)
No full textExperimental videos:
Herein, 27 distinct video files have been presented which related to dam break multiphase flood shock wave experiments, performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The initial upstream sediment depth was 24 cm which makes the upstream reservoir 80% silted-up with respect to the total 30 cm height of the reservoir. Different initial downstream conditions have also been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 3 repetitions conducted for each test, a total of 27 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
Experimental videos in studying the influences of dry- and wet-bed downstream conditions on dam break multiphase flood waves
No full textExperimental videos:
Herein, 27 distinct video files have been presented which related to dam break multiphase flood shock wave experiments which performed in the Shiraz University, Civil and Environmental Engineering Department’s Hydraulic Lab (Shiraz, Iran). The upstream reservoir was initially filled by clear water (no sediment) while different initial downstream conditions have been considered including dry-bed downstream and wet-bed downstream with different levels of standing water; 2 cm, 4 cm and 5 cm.
Considering three cameras which covered length of the flume, 4 different dam break scenarios and 3 repetitions conducted for each test, a total of 27 videos collected which presented in this document.
The additional explanations related to video files can be seen in “Explanation table of videos” file which attached to this document in Microsoft Word (DOCX/DOC) format.
Foad Vosoughi, Gholamreza Rakhshandehroo, Mohammad Reza Nikoo
Affiliations
1st Author: Foad Vosoughi, Research Associate, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. [email protected]
2nd Author: Gholamreza Rakhshandehroo, Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran.
3rd Author: Mohammad Reza Nikoo, Associate Professor, Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran
An EXAFS Investigation of Arsenic shallow implant activation in silicon after laser sub-melt annealing
No full textIt is well known that arsenic deactivates easily in silicon at moderate temperature (500–800 °C), supposedly by clustering around vacancies. The deactivation hinders the preservation of the high level of activation reached by processes such as solid phase epitaxial regrowth (SPER) or laser sub-melt annealing. This paper presents results obtained on 2 keV arsenic implants in silicon subsequently annealed by either laser sub-melt or spike processes. In particular, we investigated the local order around arsenic atoms by extended X-ray absorption fine structure (EXAFS) measurements. A sample preparation consisting of removal of some atomic layers was carried out to eliminate inactive dopant segregated at the surface oxide. The chemical depth profiles were measured by secondary ion mass spectrometry (SIMS) whereas the electrical activation was investigated by four point probe and Hall effect measurements. The EXAFS results show that the spike annealing produces a surface accumulation with a local order around As atoms similar to the amorphous structure observed in the as implanted sample. After removal of the surface accumulation, EXAFS spectra are typical of a sample with a high level of activation. This was also observed for samples processed with laser sub-melt annealing before the spike anneal. Samples treated with the only laser process show an intermediate level of crystal order. Electrical data are in agreement with the qualitative EXAFS observations
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