-
Parallel 64K Complex FFT Algorithm for the IBM/Sony/Toshiba Cell Broadband Engine Processor
. routine. (~ 2K bytes of text). W[r,c] = e-j(2/N)rc where j = -1 and. · zmat_out_prod() performs an outer product. where c = 0 to NC-1 and r = 0 to NR-1. multiply of two split complex vectors of. 3. Perform NR NC-point "row" DFTs. length 4n and 4m, respectively to form a 4n x. (logically, in-place
-
Tom-Thumb turbines power radio-controlled jets
. Development has also pushed the envelope in one other dimension: jet engines are getting smaller — a lot smaller. Hobbyists and model enthusiasts now have reliable turbine engines widely available for radio-control (RC) model jets, turboprops, and helicopters. Model turbojet engines are generally
-
Pumping new life into mobile machines
. The RC 2-2 control unit is designed for tasks such as load-limiting control, pump control, and constant speed drives. The M4 load-sensing valve control block distributes flow to several different machine functions that can operate simultaneously. And the DI2 graphical display installs in an operator
-
Magnesium takes on aluminum and steel
surfaces that accept topcoats and a hardness of between 36 and 55 Rc. Ann Arbor, Mich., have joined forces to produce electrolytic-treated Thixomolded magnesium alloy parts. The Keronite surface treatment reportedly will let magnesium gain a foothold in automotive applications where conventional magnesium
-
Proper Fastener Selection and Application are Key to Bolted Joints That Won't Loosen or Lose Clamping Force
New Criteria of Self-Loosening of Fasteners Under Vibration, Gerhard H. Junker, SAE Paper No. 69005 1969 Loosening of Fasteners by Vibration, R. C. Baubles, G.J. McCormick, C.C. Faromi, 1996 An Introduction to the Design and Behavior of Bolted Joints, Threaded-fastener technology has been around
-
The Case for Electric Motors in Unmanned Vehicle (.pdf)
target. As a result, information and any element. steel ring with an outside diameter of approximately. of surprise are lost. The problems extend beyond. 8.3 inches and a copper colored inner ring with an. the noise, which sounds much like an RC-controlled. inside diameter of 7.5 inches. It doesn't
-
NAME DBI - Database independent interface for Perl SYNOPSIS DESCRIPTION The DBI is a database access module for the Perl Language. It defines a set of methods, variables and conventions that provide a consistent database interface independant of the
= $dbh->prepare($statement); $sth = $dbh->prepare_cached($statement);. $rv = $sth->bind_param($p_num, $bind_value); $rv = $sth->bind_param($p_num, $bind_value, $bind_type); $rv = $sth->bind_param($p_num, $bind_value, \%attr);. $rv = $sth->execute; $rv = $sth->execute(@bind_values);. $rc = $sth->bind_col
-
Letters: Hoaxes and Hybrids
removal of a wing or by computer manipulation of the images. The type of flying demonstrated in the video is what is known as “3D” in RC airplane circles. These planes have huge flight control surfaces that can be operated differently from normal airplanes, and they also have the power to “helicopter