Documents disponibles écrits par cet auteur

Behavior of concrete-faced rockfill dams during initial impoundment / Seo, Min-Woo in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 8 (Août 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 8 (Août 2009) . - pp. 1070–1081 Titre : Behavior of concrete-faced rockfill dams during initial impoundment Type de document : texte imprimé Auteurs : Seo, Min-Woo, Auteur ; Ik Soo Ha, Auteur ; Yong-Seong Kim, Auteur Année de publication : 2009 Article en page(s) : pp. 1070–1081 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Dams  Rockfill  Reservoirs  Concrete  Slabs  Measurements  Centrifuge  models Note de contenu : Centrifuge tests to investigate the behavior during initial reservoir filling of a concrete faced rockfill dam (CFRD) with face slab stiffnesses that vary by a factor of about two are described. The two centrifuge models exhibited similar deformations at the crest and along the face slab, with crest settlements averaging 0.19H (%) and maximum face slab deformations averaging 0.88H (%). The centrifuge test results suggest that the face slab stiffness had little effect on deformations, at least for the range of stiffnesses examined here. A parametric study of transition (supporting) zone stiffness was performed using a numerical model calibrated using the centrifuge results. The numerical results indicated that face slab deformation is more influenced by transition zone stiffness than face slab stiffness, supporting the centrifuge results. Deformation measurements for 25 in-service CFRDs (including six Korean CFRDs—one of which was used as the basis for the centrifuge model dam) are presented and compared with the experimental and numerical results. The centrifuge experiments exhibited crest settlements similar to the Korean CFRDs; however, the centrifuge models exhibited considerably larger maximum face slab deflections. The larger values measured in the centrifuge tests likely resulted from some experimental limitations. These limitations, as well as suggestions for improving future centrifuge studies of CFRDs, are discussed. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000021 [article] Behavior of concrete-faced rockfill dams during initial impoundment [texte imprimé] / Seo, Min-Woo, Auteur ; Ik Soo Ha, Auteur ; Yong-Seong Kim, Auteur . - 2009 . - pp. 1070–1081. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 8 (Août 2009) . - pp. 1070–1081 Mots-clés : Dams  Rockfill  Reservoirs  Concrete  Slabs  Measurements  Centrifuge  models Note de contenu : Centrifuge tests to investigate the behavior during initial reservoir filling of a concrete faced rockfill dam (CFRD) with face slab stiffnesses that vary by a factor of about two are described. The two centrifuge models exhibited similar deformations at the crest and along the face slab, with crest settlements averaging 0.19H (%) and maximum face slab deformations averaging 0.88H (%). The centrifuge test results suggest that the face slab stiffness had little effect on deformations, at least for the range of stiffnesses examined here. A parametric study of transition (supporting) zone stiffness was performed using a numerical model calibrated using the centrifuge results. The numerical results indicated that face slab deformation is more influenced by transition zone stiffness than face slab stiffness, supporting the centrifuge results. Deformation measurements for 25 in-service CFRDs (including six Korean CFRDs—one of which was used as the basis for the centrifuge model dam) are presented and compared with the experimental and numerical results. The centrifuge experiments exhibited crest settlements similar to the Korean CFRDs; however, the centrifuge models exhibited considerably larger maximum face slab deflections. The larger values measured in the centrifuge tests likely resulted from some experimental limitations. These limitations, as well as suggestions for improving future centrifuge studies of CFRDs, are discussed. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000021

A CMOS transceiver for a multistandard 13.56-MHz RFID reader SoC / Young-Han Kim in IEEE transactions on industrial electronics, Vol. 57 N° 5 (Mai 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1563 - 1572 Titre : A CMOS transceiver for a multistandard 13.56-MHz RFID reader SoC Type de document : texte imprimé Auteurs : Young-Han Kim, Auteur ; Choi, Yong-Chang, Auteur ; Seo, Min-Woo, Auteur Année de publication : 2011 Article en page(s) : pp. 1563 - 1572 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Multistandard  Radio-frequency  identification  (RFID)  Reader  System-on-a-chip  (SoC)  Transceiver Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A CMOS transceiver for a multistandard 13.56-MHz radio-frequency identification reader system-on-a-chip (SoC) is designed and fabricated. The SoC consists of an RF/analog part for modulation/demodulation and a digital part for controlling the transceiver functionality. Prior to designing the integrated circuit, pre-experiments using discrete components and commercial tags are performed. With the results, overall functions and specifications are determined. For supporting multistandard, several blocks are designed with digital controls according to the standards. In the transmitter, a digitally controlled amplitude modulator for various modulation indexes and a power control circuit are adopted. In the receiver, a variable gain amplifier and a level-controllable comparator, which are also controlled digitally according to the standard, are introduced. The full transceiver SoC is implemented in the Chartered 0.18-??m CMOS technology. The measurement results of the implemented chip indicate that the designed transceiver operates in a multistandard mode. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332286 [article] A CMOS transceiver for a multistandard 13.56-MHz RFID reader SoC [texte imprimé] / Young-Han Kim, Auteur ; Choi, Yong-Chang, Auteur ; Seo, Min-Woo, Auteur . - 2011 . - pp. 1563 - 1572. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1563 - 1572 Mots-clés : Multistandard  Radio-frequency  identification  (RFID)  Reader  System-on-a-chip  (SoC)  Transceiver Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A CMOS transceiver for a multistandard 13.56-MHz radio-frequency identification reader system-on-a-chip (SoC) is designed and fabricated. The SoC consists of an RF/analog part for modulation/demodulation and a digital part for controlling the transceiver functionality. Prior to designing the integrated circuit, pre-experiments using discrete components and commercial tags are performed. With the results, overall functions and specifications are determined. For supporting multistandard, several blocks are designed with digital controls according to the standards. In the transmitter, a digitally controlled amplitude modulator for various modulation indexes and a power control circuit are adopted. In the receiver, a variable gain amplifier and a level-controllable comparator, which are also controlled digitally according to the standard, are introduced. The full transceiver SoC is implemented in the Chartered 0.18-??m CMOS technology. The measurement results of the implemented chip indicate that the designed transceiver operates in a multistandard mode. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332286

Sequential analysis of ground movements at three deep excavation sites with mixed ground profiles / Seo, Min-Woo in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 5 (Mai 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 656-668 Titre : Sequential analysis of ground movements at three deep excavation sites with mixed ground profiles Type de document : texte imprimé Auteurs : Seo, Min-Woo, Auteur ; Scott M. Olson, Auteur ; Ku Seung Yang, Auteur Année de publication : 2010 Article en page(s) : pp. 656-668 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Excavation  Settlement  Lateral  displacement  Diaphragm  wall  Bracing  Anchors  Residual  soils  Bedrock Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Field measurements of settlement and lateral deformation obtained from three deep excavation sites constructed in mixed ground profiles are presented and analyzed. Settlement measurements were obtained throughout the construction process, categorized in three stages as: (1) preexcavation (i.e., preliminary site work and support wall installation); (2) main excavation and bracing/anchor installation; and (3) postexcavation (i.e., removal of bracing as basement construction proceeds). Maximum preexcavation stage settlements of 0.03%Hw to 0.06%Hw (where Hw = wall or trench depth) were measured at two sites, with the maximum settlements occurring adjacent to the wall during its installation. Maximum ground surface settlements during the main excavation stage ranged from about 0.15%He to 0.30%He (where He = final excavation depth) and the distribution of ground settlement extended to a distance of 1.5He to 2.0He from the wall. Maximum settlements occurred at distances of about 0.3He to 0.5He from the wall at two sites where the wall consisted of concrete cast in situ (concrete diaphragm and concrete secant pile walls), creating a significant reverse curvature in the settlement distribution. The maximum postexcavation stage settlements ranged from 0.07%He to 0.10%He for the three sites, representing roughly 10 to 60% increases in settlement over the main excavation settlements, depending greatly on the specific support removal methods as well as the basement floor construction details employed at an individual site. Lateral deflections during the main excavation stage were consistent with trends reported in the literature, ranging from 0.12%He to 0.23%He, while lateral movement during postexcavation stage ranged from 0.03%He to 0.09%He. Finally, the settlements measured during the main and postexcavation stages are related to the support system stiffness. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p656_s1?isAuthorized=no [article] Sequential analysis of ground movements at three deep excavation sites with mixed ground profiles [texte imprimé] / Seo, Min-Woo, Auteur ; Scott M. Olson, Auteur ; Ku Seung Yang, Auteur . - 2010 . - pp. 656-668. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 5 (Mai 2010) . - pp. 656-668 Mots-clés : Excavation  Settlement  Lateral  displacement  Diaphragm  wall  Bracing  Anchors  Residual  soils  Bedrock Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Field measurements of settlement and lateral deformation obtained from three deep excavation sites constructed in mixed ground profiles are presented and analyzed. Settlement measurements were obtained throughout the construction process, categorized in three stages as: (1) preexcavation (i.e., preliminary site work and support wall installation); (2) main excavation and bracing/anchor installation; and (3) postexcavation (i.e., removal of bracing as basement construction proceeds). Maximum preexcavation stage settlements of 0.03%Hw to 0.06%Hw (where Hw = wall or trench depth) were measured at two sites, with the maximum settlements occurring adjacent to the wall during its installation. Maximum ground surface settlements during the main excavation stage ranged from about 0.15%He to 0.30%He (where He = final excavation depth) and the distribution of ground settlement extended to a distance of 1.5He to 2.0He from the wall. Maximum settlements occurred at distances of about 0.3He to 0.5He from the wall at two sites where the wall consisted of concrete cast in situ (concrete diaphragm and concrete secant pile walls), creating a significant reverse curvature in the settlement distribution. The maximum postexcavation stage settlements ranged from 0.07%He to 0.10%He for the three sites, representing roughly 10 to 60% increases in settlement over the main excavation settlements, depending greatly on the specific support removal methods as well as the basement floor construction details employed at an individual site. Lateral deflections during the main excavation stage were consistent with trends reported in the literature, ranging from 0.12%He to 0.23%He, while lateral movement during postexcavation stage ranged from 0.03%He to 0.09%He. Finally, the settlements measured during the main and postexcavation stages are related to the support system stiffness. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i5/p656_s1?isAuthorized=no