This study focuses on the manufacture of carbon nanotubes using the arc discharge method. Several independent variables were changed, such as the current (80 and 100 A), an atmosphere of open air or argon and the catalyst (no catalyst, Fe or a mixture of Fe/Co,Ni). Only one set of parameters yielded MWNTs, involving Fe as the catalyst and an open air atmosphere. I. INTRODUCTION There has been i...

The characteristics of submerged flow below vertical gate with sill upstream of horizontal diverging channel reach are analyzed based on experimental investigation. The experimental program is conducted in a laboratory flume with 10 cm wide, 31 cm deep and 3.0 m long. A diverging channel reach with fixed length and constant divergence angle is used. Polygonal sills with constant height, constan...

Most centrifugal compressors are required to operate over a broad range of flow rates and to provide a high pressure ratio with high efficiency. In order to meet these demands the application of variable geometry techniques is often considered and applied. The potential areas for the application of variable geometry procedures lie at inlet to and discharge from the impeller. This paper reviews ...

In this Research, the desktop micro forming manufacturing system has been developed. A micro forming system has been achieved in Japan and its developed micro press is limited to single forming process. To coincide with the purpose to be more practical, research and development is necessary about the press which the multi forming process is possible. Micro patterned metal components are used in...

Article history: Received 22 October 2013 Received in revised form 14 January 2014 Accepted 20 January 2014 Available online 1 February 2014

Streambed temperatures can be easily, accurately and inexpensively measured at many locations. To characterize patterns of groundwater-stream water interaction with a high spatial resolution, we measured 140 vertical streambed temperature profiles along a 220m section of a small manmade stream. Groundwater temperature at a sufficient depth remains nearly constant while stream water temperatures...

1 Department of Medicine and Aged Care, Northern Health Melbourne, Australia. 2 Aged Care Austin Health, Melbourne. Australia. 3 Institute for Breathing and Sleep, Austin Health, Melbourne. Australia. 4 Monash Medical Centre, Monash University, Melbourne, Australia. 5 Northern Clinical Research Centre, Northern Health & Department of Medicine, The University of Melbourne, Melbourne, Australia. ...

In electricfish ofthe mormyridfamily, an efference copy is present in the brain region that receives afferent input from ampullary electroreceptors. The efference copy is elicited by the motor command tofire the electric organ. Its effect is always opposite that of ampullary afferents responding to the electric organ discharge, and it changes to match variations in this afferent input. It proba...