Demonstration of multi-channel 80 Gbit/s integrated transmitter and receiver for wavelength-division multiplexing passive optical network and fronthauling applications

The performance evaluation of a multi-channel transmitter that employs an arrayed reflective electroabsorption modulator-based photonic integrated circuit and a low-power driver array in conjunction with a multi-channel receiver incorporating a pin photodiode array and integrated arrayed waveguide grating is reported. Due to their small footprint, low power consumption and potential low cost, these devices are attractive solutions for future mobile fronthaul and next generation optical access networks. A BER performance of <10(-9) at 10.3 Gbit/s per channel is achieved over 25 km of standard single mode fibre. The transmitter/receiver combination can achieve an aggregate bit rate of 82.4 Gbit/s when eight channels are active

ASTOVL Combat Aircraft Design Synthesis and Optimization

This thesis presents the development of a Baseline Configuration for an Advanced Short Take-Off and Vertical Landing (ASTOVL) Combat Aircraft, the Design Synthesis and coding of this Baseline Congiguration (Code VERTI), the interfacing of the Design Synthesis Code VERTI with the Optimizer code RQPMIN and the optimization of the Baseline Configuration. The background and the objectives of this Research Programme are initially examined. The evaluation of the ASTOVL Combat Aircraft Baseline Configuration is then described, including all the problems, assumptions, choices and compromises that led to the specific configuration. The development of the Design Synthesis and the Code VERTI then follow, where the methodology used, the techniques adopted and the code operation are explained. A full description of the Design Synthesis is included as an appendix. Finally, the interfacing of Code VERTI with the optimizer RQPMIN and the optimization of the Baseline configuration are presented. The problems and difficulties of the RQPMIN operation are thoroughly discussed. The RQPMIN- VERTI code is used to optimize the initial Baseline Configuration and an optimization example is provided in appendix form. The optimized Baseline Configuration is partly validated against two ASTOVL combat aircraft designs. In addition to the optimization with the aircraft empty mass as objective function, a search for a better objective function is attempted

RESPONSES OF RENAL-FUNCTION TO ELEVATED INTRAVESICAL PRESSURE

This experimental study was designed to investigate the responses of renal function to elevated intravesical pressure. Ten male New Zealand type rabbits were used. A supravesical ureterocutaneous urinary diversion was performed in all rabbits to disconnect bladder and kidneys and to ensure a free urine flow. Two parameters of renal function were measured simultaneously: urine output by simple collection and glomerular filtration rate (GFR) by total plasma clearance of Cr-51-EDTA. Measurements were performed initially with the bladder empty and then with intravesical pressure 60 cm H2O. A significant decrease in urine output and in GFR was observed in all rabbits when the bladder was overdistended. Urine output returned to the initial levels after relief of the increased intravesical pressure. The results suggest that for these responses a vesicorenal reflex activated by the elevated intravesical pressure is responsible

ASTOVL combat aircraft design synthesis and optimization

SIGLEAvailable from British Library Document Supply Centre- DSC:DX98001 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

RESPONSE OF URINARY SODIUM-EXCRETION TO ELEVATED INTRAVESICAL PRESSURE

This experimental study was designed to investigate the possibility of an interaction between elevated intravesical pressure and urinary sodium excretion. Fourteen male New Zealand rabbits were used. After performing a ureterocutaneous diversion, urinary sodium excretion was measured in two situations: with the bladder empty and with the bladder overdistended and an intravesical pressure of 60 cm H2O. There was a significant decrease in urinary sodium excretion at an elevated intravesical pressure. The urinary sodium excretion returned to normal after relief of the pressure. The results suggest the existence of a neurogenic pathway activated by the elevated intravesical pressure

ASTOVL combat aircraft design synthesis and optimization

10.00Available from British Library Document Supply Centre- DSC:3310.76(CIT-CA-R--9201) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo