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Improving Urinary Continence after Radical Prostatectomy: Review of Surgical Modifications
Jonathan J. Hwang,Bo Young Kim,Edward M. Uchio 대한비뇨의학회 2009 Investigative and Clinical Urology Vol.50 No.10
Purpose: Urinary incontinence remains the most feared long-term complication following radical prostatectomy with potentially devastating psychosocial consequences. In recent years, several surgical techniques have been introduced during radical prostatectomy, both open and laparoscopic/robotic, in the hope of improving urinary continence outcomes. Herein, we review the various surgical modifications that have shown a benefit in minimizing post-prostatectomy urinary incontinence (PPI). Materials and Methods: A comprehensive review of the current urologic literature was conducted to identify surgical techniques that have been correlated with improved continence following radical prostatectomy. Results: Over the years, several surgical modifications have been incorporated into radical prostatectomy in order to minimize the risk of prolonged PPI. Most techniques emphasize the importance of restoring the “normal” pelvic anatomy after removal of the prostate gland. In addition, certain patient factors such as preoperative posterior urethral length and patient age appear to have an independent prognostic value in predicting PPI. Postoperatively, bladder neck contracture remains the most consistent complication leading to PPI. Conclusions: The present findings suggest that the risk of PPI can be minimized, or even eliminated, through careful patient selection and surgical modifications during radical prostatectomy. Purpose: Urinary incontinence remains the most feared long-term complication following radical prostatectomy with potentially devastating psychosocial consequences. In recent years, several surgical techniques have been introduced during radical prostatectomy, both open and laparoscopic/robotic, in the hope of improving urinary continence outcomes. Herein, we review the various surgical modifications that have shown a benefit in minimizing post-prostatectomy urinary incontinence (PPI). Materials and Methods: A comprehensive review of the current urologic literature was conducted to identify surgical techniques that have been correlated with improved continence following radical prostatectomy. Results: Over the years, several surgical modifications have been incorporated into radical prostatectomy in order to minimize the risk of prolonged PPI. Most techniques emphasize the importance of restoring the “normal” pelvic anatomy after removal of the prostate gland. In addition, certain patient factors such as preoperative posterior urethral length and patient age appear to have an independent prognostic value in predicting PPI. Postoperatively, bladder neck contracture remains the most consistent complication leading to PPI. Conclusions: The present findings suggest that the risk of PPI can be minimized, or even eliminated, through careful patient selection and surgical modifications during radical prostatectomy.
Emergence of Kondo Resonance in Graphene Intercalated with Cerium
Hwang, Jinwoong,Kim, Kyoo,Ryu, Hyejin,Kim, Jingul,Lee, Ji-Eun,Kim, Sooran,Kang, Minhee,Park, Byeong-Gyu,Lanzara, Alessandra,Chung, Jinwook,Mo, Sung-Kwan,Denlinger, Jonathan,Min, Byung Il,Hwang, Choong American Chemical Society 2018 NANO LETTERS Vol.18 No.6
<P>The interaction between a magnetic impurity, such as cerium (Ce) atom, and surrounding electrons has been one of the core problems in understanding many-body interaction in solid and its relation to magnetism. Kondo effect, the formation of a new resonant ground state with quenched magnetic moment, provides a general framework to describe many-body interaction in the presence of magnetic impurity. In this Letter, a combined study of angle-resolved photoemission (ARPES) and dynamic mean-field theory (DMFT) on Ce-intercalated graphene shows that Ce-induced localized states near Fermi energy, <I>E</I><SUB>F</SUB>, hybridized with the graphene π-band, exhibit gradual increase in spectral weight upon decreasing temperature. The observed temperature dependence follows the expectations from the Kondo picture in the weak coupling limit. Our results provide a novel insight how Kondo physics emerges in the sea of two-dimensional Dirac electrons.</P> [FIG OMISSION]</BR>
Gapped Nearly Free-Standing Graphene on an SiC(0001) Substrate Induced by Manganese Atoms
Hwang, Jinwoong,Lee, Ji-Eun,Kang, Minhee,Park, Byeong-Gyu,Denlinger, Jonathan,Mo, Sung-Kwan,Hwang, Choongyu The Korean Vacuum Society 2018 Applied Science and Convergence Technology Vol.27 No.5
The electron band structure of manganese-adsorbed graphene on an SiC(0001) substrate has been studied using angle-resolved photoemission spectroscopy. Upon introducing manganese atoms, the conduction band of graphene, that is observed in pristine graphene indicating intrinsic electron-doping by the substrate, completely disappears and the valence band maximum is observed at 0.4 eV below Fermi energy. At the same time, the slope of the valence band decreases by the presence of manganese atoms, approaching the electron band structure calculated using the local density approximation method. The former provides experimental evidence of the formation of nearly free-standing graphene on an SiC substrate, concomitant with a metal-to-insulator transition. The latter suggests that its electronic correlations are efficiently screened, suggesting that the dielectric property of the substrate is modified by manganese atoms and indicating that electronic correlations in grpahene can also be tuned by foreign atoms. These results pave the way for promising device application using graphene that is semiconducting and charge neutral.
The electronic correlations in graphene standing on SrTiO₃ and platinum substrates
Jinwoong Hwang,Hyejin Ryu,Hwihyeon Hwang,Min-Jeong Kim,Ji-Eun Lee,Qin Zhou,Debin Wang,Ankit S. Disa,Jonathan Denlinger,Yuegang Zhang,Alessandra Lanzara,Sung-Kwan Mo,Choongyu Hwang 한국진공학회 2018 한국진공학회 학술발표회초록집 Vol.2018 No.2
Ishida, Masatoshi,Hwang, Deasub,Koo, Young Bean,Sung, Jooyoung,Kim, Dong Young,Sessler, Jonathan L.,Kim, Dongho The Royal Society of Chemistry 2013 Chemical communications Vol.49 No.80
<P>The palladium-catalyzed oxidative alkynylation of β-borylated porphyrins allows for concise preparation of push–pull structured ethynylbenzoic acid porphyrin derivatives. The resulting β-singly- and doubly-substituted porphyrin dyes are regarded as isomeric derivatives of the corresponding <I>meso</I>-substituted reference systems, and were found to give rise to nearly equal power conversion efficiencies when analyzed in DSSCs.</P> <P>Graphic Abstract</P><P>A new set of β-ethynylphenyl substituted porphyrin-based DSSC dyes were prepared <I>via</I> palladium-catalyzed direct alkynylation of β-borylated porphyrins to investigate the effect of the structure–efficiency relationship. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cc44847a'> </P>
Temperature-Dependent Electron–Electron Interaction in Graphene on SrTiO<sub>3</sub>
Ryu, Hyejin,Hwang, Jinwoong,Wang, Debin,Disa, Ankit S.,Denlinger, Jonathan,Zhang, Yuegang,Mo, Sung-Kwan,Hwang, Choongyu,Lanzara, Alessandra American Chemical Society 2017 NANO LETTERS Vol.17 No.10
<P>The electron band structure of graphene on SrTiO3 substrate has been investigated as a function of temperature. The high-resolution angle-resolved photoemission study reveals that the spectral width at Fermi energy and the Fermi velocity of graphene on SrTiO3 are comparable to those of graphene on a BN substrate. Near the charge neutrality, the energy-momentum dispersion of graphene exhibits a strong deviation from the well-known linearity, which is magnified as temperature decreases. Such modification resembles the characteristics of enhanced electron electron interaction. Our results not only suggest that SrTiO3 can be a plausible candidate as a substrate material for applications in graphene-based electronics but also provide a possible route toward the realization of a new type of strongly correlated electron phases in the prototypical two-dimensional system via the manipulation of temperature and a proper choice of dielectric substrates.</P>