The Experts below are selected from a list of 153 Experts worldwide ranked by ideXlab platform
Marc Anthony Chouillard - One of the best experts on this subject based on the ideXlab platform.
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Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?—Analysis of 116 Consecutive Cases
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Antonio D’alessandro, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Luigi Crispo, Marc Anthony ChouillardAbstract:Purpose In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. Materials and Methods Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). Results A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB ( p
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Correction to: Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?-Analysis of 116 Consecutive Cases.
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Antonio D'alessandro, Luigi Prisco, Marc Anthony ChouillardAbstract:PURPOSE In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. MATERIALS AND METHODS Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). RESULTS A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB (p
Yi-bing Lin - One of the best experts on this subject based on the ideXlab platform.
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Modeling mobility Database Failure restoration using checkpoint schemes
IEEE Transactions on Wireless Communications, 2007Co-Authors: Sok-ian Sou, Yi-bing LinAbstract:This paper studies checkpointing and Failure restoration of mobility Database for Universal Mobile Telecommunications System (UMTS). By utilizing per-user checkpointing technique, individual home location register (HLR) records are saved into non-volatile backup storage form time to time. When a Failure occurs, the backup record is restored back to the mobility Database. We consider three per-user checkpoint schemes for the HLR. An analytic model is developed to investigate these schemes in terms of the probability that a HLR backup record is obsolete and the expected checkpoint interval. This model is validated against simulation experiments. Our study provides guidelines for selecting an appropriate checkpoint scheme and parameters for various traffic conditions
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Per-user checkpointing for mobility Database Failure restoration
IEEE Transactions on Mobile Computing, 2005Co-Authors: Yi-bing LinAbstract:This paper studies the Failure restoration of mobility Database for Universal Mobile Telecommunications System (UMTS). We consider a per-user checkpointing approach for the home location register (HLR) Database. In this approach, individual HLR records are saved into a backup Database from time to time. When a Failure occurs, the backup record is restored back to the mobility Database. We first describe a commonly used basic checkpoint algorithm. Then, we propose a new checkpoint algorithm. An analytic model is developed to compare these two algorithms in terms of the checkpoint cost and the probability that an HLR backup record is obsolete. This analytic model is validated against simulation experiments. Numerical examples indicate that our new algorithm may significantly outperform the basic algorithm in terms of both performance measures.
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PIMRC - On optimizing the location update costs in the presence of Database Failures
Wireless Networks, 1998Co-Authors: Zygmunt J. Haas, Yi-bing LinAbstract:This paper studies the Database Failure recovery procedure for cellular phone networks as part of the EIA/TIA IS-41 standard. We show that, under some cost assumptions, a periodic update interval should be chosen to be approximately equal to the call interarrival time, with more frequent updates for more unreliable system. We also show that the cost of an optimized system is relatively small and stable, if the system is even moderately reliable. Finally, if the system is at least moderately reliable, the effects of call origination rate and the rate at which location areas are crossed are rather small, assuming that the periodic update interval was chosen as stated above. Thus in such cases, optimization of the size of the location area can be made independent of the optimization of the periodic update process.
Elias Chahine - One of the best experts on this subject based on the ideXlab platform.
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Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?—Analysis of 116 Consecutive Cases
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Antonio D’alessandro, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Luigi Crispo, Marc Anthony ChouillardAbstract:Purpose In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. Materials and Methods Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). Results A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB ( p
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Correction to: Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?-Analysis of 116 Consecutive Cases.
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Antonio D'alessandro, Luigi Prisco, Marc Anthony ChouillardAbstract:PURPOSE In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. MATERIALS AND METHODS Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). RESULTS A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB (p
Imrich Chlamtac - One of the best experts on this subject based on the ideXlab platform.
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Analytical results for optimal choice of location update interval for mobility Database Failure restoration in PCS networks
IEEE Transactions on Parallel and Distributed Systems, 2000Co-Authors: Imrich ChlamtacAbstract:When the location information for a mobile user in the Home Location Register (HLR) is corrupted or obsolete, the new arriving calls to the user may be lost. In order to minimize the effect of such HLR mobility Database Failure, a location update scheme called period location updating is proposed, and the cost analysis is performed. Analytical results for the Failure recovery time distribution and the average number of call losses, which are crucial for cost analysis, are presented. The optimal location update period is given analytically as a function of other traffic parameters. This optimal choice of location update period lays the foundation for the adaptive adjustment of the location update period in Failure restoration for PCS networks.
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Optimal location update: scheme to combat Database Failure for PCS networks
IEEE GLOBECOM 1998 (Cat. NO. 98CH36250), 1998Co-Authors: Imrich ChlamtacAbstract:When location information in the home location register (HLR) is corrupted or obsolete, the new arriving calls to the portable may be lost. In order to minimize the effect of such a HLR mobility Database Failure, a location update scheme which is called period location updating is proposed, and a cost analysis is performed. Analytical results for the Failure recovery time distribution and time average number of call losses, which are crucial for cost analysis, are presented. The optimal location update period is found analytically and can be expressed as a function of other traffic parameters. This optimal choice of location update period lays the foundation for adaptively adjusting the location update period in PCS Failure restoration.
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INFOCOM - An active mobility Database Failure recovery scheme and performance analysis for PCS networks
Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Socie, 1Co-Authors: Yuguang Fang, Imrich Chlamtac, Hong-bing FeiAbstract:In wireless mobile networks, particularly in PCS networks, new calls to a portable may be lost due to the incorrect location information in the mobility Database, which leads to a Database Failure. Such Database Failure can be recovered either through the portable's registration initiation, the deregistration when it crosses the location area boundary or the active location update. In this paper, we analyze the active location update scheme under several different mobile traffic distributions for Failure restoration. We present analytical results for cost analysis. We find that under certain conditions there exists an optimal choice of location update period to minimize the total cost which represents the tradeoff between the location update and call loss. Our results provide a general framework for evaluating active Database Failure recovery schemes in wireless networks.
Maria Cristina Cartillone - One of the best experts on this subject based on the ideXlab platform.
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Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?—Analysis of 116 Consecutive Cases
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Antonio D’alessandro, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Luigi Crispo, Marc Anthony ChouillardAbstract:Purpose In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. Materials and Methods Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). Results A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB ( p
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Correction to: Weight Regain After Gastric Plication: Reoperative Sleeve Gastrectomy or Roux-en-Y Gastric Bypass?-Analysis of 116 Consecutive Cases.
Obesity Surgery, 2020Co-Authors: Elias Chahine, Mubarak Alkandari, Belinda De Simone, Mazen Dirani, Elias Saikaly, Andrew Gumbs, Maria Cristina Cartillone, Antonio D'alessandro, Luigi Prisco, Marc Anthony ChouillardAbstract:PURPOSE In France, laparoscopic gastric plication (GP) has rarely been utilized as a weight loss procedure. Although relatively safe and efficient, its long-term results are still controversial. The goal of this study is to assess the indications and outcomes of revisional surgery post-GP. MATERIALS AND METHODS Between February 2010 and September 2017, patient characteristics undergoing GP were prospectively collected from our Database. Failure of conservative treatment or presence of anatomical anomaly explaining weight loss insufficiency was an indication for revisional surgery (RS). RESULTS A total of 300 patients were included, 41 patients were lost to follow-up (13.7%), 124 patients (41.3%) had total weight loss (TWL) > 30%, and 116 patients (38.7%) underwent RS. Revisional procedures were laparoscopic Roux-en-Y gastric bypass (RYGB) in 72 patients (62.1%) and sleeve gastrectomy (SG) in 44 patients (37.9%). The median interval to RS was 29 months. The mean operative time was 60 min for the SG and 125 min for the RYGB (p
