We present a measurement study of an operative WLAN. After briefly presenting the methodology used to generate traffic and measure performance indices, we present results focusing on the performance perceived by TCP connections, to understand the mechanisms which have a major effect on performance. We investigate the impact of TCP parameters, like the maximum congestion window, the effectivenes...

We have studied the temporal bones of 4 deceased donors, individuals one with cochlear saccular degeneration, another with Mondini dysplasia, another with an ossification of the basal turn of the cochlea and the round window, post meningitis and the fourth who was implanted 10 years before. The indications and contraindications for cochlear implant placement are discussed.

introduction:visualization of inner ear structures is a valuable strategy for researchers and clinicians working on hearing pathologies. optical coherence tomography (oct) is a high-resolution imaging technology which may be used for the visualization of tissues. in this experimental study we aimed to evaluate inner ear anatomy in well-prepared human labyrinthine bones.materials and methods:thr...

We study TCP throughput and fairness over UBR for several buffer and maximum window sizes. TCP performs best when there is no loss. The performance is severely degraded under loss (regardless of UBR or ABR). Therefore, we study the switch buffer requirements for zero loss. The required buffers are found to be the function of number of VCs and their round-trip times. ****************************...

Short-range low power radio frequency systems such as Bluetooth and UWB enable the deployment of wireless personal area networks (WPAN). A WPAN can interface to larger networks to provide broader network access and Internet connectivity. We evaluate the performance of TCP over an integrated WLAN and WPAN system using a real network testbed. The end-to-end throughput is found to increase, when t...

BACKGROUND AND PURPOSE A preoperative prediction of the 360 degrees point insertion depth would aid the planning of electric acoustic stimulation (EAS) implantation. The purpose of this study was to establish whether the distance between the round window and the opposite cochlear wall on CT or MR imaging may be used to predict the length of a cochlear implant electrode array required to be inse...

BACKGROUND Total ossicular replacement prostheses (TORP) are often used to re-establish ossicular coupling of sound in an ear lacking a stapes supra-structure. The use of TORPs, however, is associated with a 2/3 five year failure rate due to their anatomic instability over time in the middle ear. The use of autologous fat to try and stabilize TORPs may improve long-term results with this challe...

Tissue formation around the electrode array of a cochlear implant has been suggested to influence preservation of residual hearing as well as electrical hearing performance of implanted subjects. Further, inhomogeneity in the electrical properties of the scala tympani shape the electrical field and affect current spread. Intracochlear trauma due to electrode insertion and the insertion site its...

Introduction The preservation of residual hearing is currently an important challenge for cochlear implant surgeries. Indeed, if patients exhibit functional hearing after cochlear implantation, they can benefit from the combination of acoustical stimulation, usually in the low-frequencies and electrical stimulation in the high-frequencies. This combined mode of stimulation has proven to be bene...

This paper explores the potential of improving Internet congestion control by providing precise congestion feedback to the sources instead of the implicit and binary feedback used by TCP. We propose a window-based protocol in which each sender maintains its congestion window and round trip time and communicates this information to the routers in a congestion header attached to every packet. The...