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Yvon F. Bryan,T. Wesley Templeton 대한마취통증의학회 2016 Korean Journal of Anesthesiology Vol.69 No.4
The laryngeal mask airway (LMA) ClassicTM and Air-QⓇ are supralaryngeal devices used for airway management in routine and difficult pediatric airways. We describe a novel two-stage technique of insertion of the LMA ClassicTM awake prior to induction of anesthesia, to assure oxygenation and ventilation, and after induction removal and placement of the Air-QⓇ for intubation using the flexible fiberoptic bronchoscope. The LMA Classic’sTM pliable design and relatively small size allow it to be easily placed in awake infants. In contrast, the Air-QⓇ is an excellent device for intubation because of its larger internal diameter and removable 9 mm adapter. Our goal was to reduce unpredictability and potentially increase the safety of induction of anesthesia and intubation in infants with Pierre Robin sequence. By using these devices in a two-stage approach we created a technique for consistent oxygenation, ventilation, and intubation in these infants.
A New Architecture to Offload Network Traffic using OpenFlow in LTE
VENMANI Daniel Philip,Yvon GOURHANT,Djamal ZEGHLACHE 한국산업정보학회 2012 한국산업정보학회논문지 Vol.17 No.1
Next generation cellular applications and smart phone usage generate very heavy wireless data traffic. It becomes ineluctable for mobile network operators to have multiple core network entities such as Serving Gateway and Packet Data Network Gateway in 4G-LTE to share this high traffic generated. A typical configuration consists of multiple serving gateways behind a load-balancer which would determine which serving gateway would service a end-users" request. Such hardware is expensive, has a rigid policy set and is a single point of failure. Another perspective of today"s increasingly high data traffic is that besides it is being widely accepted that the high bandwidth LTE provides is creating bottlenecks for service providers by the increasing user bandwidth demands without creating any corresponding revenue improvements, a hidden problem that is also passively advancing on the newly emerging 4G-LTE that nay need more immediate attention is the network signaling traffic, also known as the control-plane traffic that is generated by the applications developed for smartphones and tablets. With this as starting point, in this paper, we propose a solution, by a new approach considering OpenFlow switch connected to a controller, which gains flexibility in policy, costs less, and has the potential to be more robust to failure with future generations of switches. This also solves the problem of scaling the control-plane traffic that is imperative to preserve revenue and ensure customer satisfaction. Thus, with the proposed architecture with OpenFlow, mobile network operators could manipulate the traffic generated by the control-plane signaling separated from the data-plane, besides also reducing the cost in installing multiple core-network entities.
Identifying Creep and Destructuration Related Soil Parameters by Optimization Methods
Yin-Fu Jin,Zhen-Yu Yin,Yvon Riou,Pierre-Yves Hicher 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.4
The paper aims to construct an efficient optimization method for identifying creep and destructuration related governing parameters of soft structured clay. An elastic viscoplastic model has been developed and adopted. Different optimization processes, by genetic algorithm or particle swarm optimization with uniform or random samplings initialization methods, are carried out to obtain the material parameters from conventional undrained triaxial tests performed on a K0-concolidated natural soft clay. All comparisons demonstrate that the uniqueness of the solution is better guaranteed with the genetic algorithm rather than with the particle swarm optimization method. Furthermore, the efficiency of genetic algorithm has been verified by simulating other tests.