In this paper we describe a machine vision system for inspecting bearings, which are an important part of electro-mechanical kWh meters. The system consists of a personal computer with a frame grabber, a black and white progressive scan CCD camera, and a mechanical device with a stepper motor controlled by a special controller connected to the RS232 port of the personal computer. The quality of...

Cryosurgery is a minimally invasive treatment for certain types of cancers. Argon-based cryosurgical devices are available at present, however a large compressed gas cylinder with the pressure of 300 atmospheres is needed. To overcome these drawbacks, we developed a new cryosurgical probe measuring about 50 cm in length with separate lumens inside for liquid and gaseous ethylene to be used as a...

A dielectric barrier discharge (DBD) produces a homogenous discharge with low energy consumption, offering broad developmental prospects, and this discharge process is also the mechanism through which charges are transported. Higher reaction efficiency is achieved when more charges are transported. Focusing on the electrode configuration of the multineedle-to-cylinder (MC) system, i.e., the str...

Recently, the high-pressure fuel injection performance of common-rail direct injection (CRDi) engines has become more important, due to the need to improve the multi-injection strategy. A multiple injection strategy provides better emission and fuel economy characteristics than a normal single injection scheme. The CRDi engine performance changes with the type of high-pressure electro-mechanica...

Among the alternative fuels, hydrogen shows great potential in the near future. In the present study, hydrogen utilization as diesel engine fuel was investigated. Hydrogen can not be used directly in a diesel engine due to its autoignition temperature higher than that of diesel fuel. One alternative method is to use hydrogen in enrichment or induction. To investigate the combustion characterist...

A numerical technique is proposed for determining the distributions of electric field and charge density in the case of a positive corona discharge in gas in the point–plane geometry. This technique is based on the boundary and finite elements methods for obtaining the harmonic and space charge components of the electric field, respectively, and on the method of characteristics to determine the...

results in the first series, cellularity and blood levels were significantly lower in capillary-fnb compared with cfnb (p < 0.001 and p = 0.011, respectively). there was no significant difference between cfnb and vacfnb in cellularity and blood (p = 0.15 and p = 0.1, respectively). in the second series, cellularity was significantly higher in cfnb compared with vacfnb (p < 0.001) with no signif...

We develop an orders-of-scattering approximation, termed the “screened cylindrical void/ core” (SCV) approximation, for a composite cylinder. The composite cylinder consists of a large host cylinder that contains a small, eccentrically embedded, core cylinder. The SCV approximation is developed via separation of variables in conjunctionwith addition theorems for cylindrical functions. We show t...

Figure 1. Vertical dimension recorder. Rectangular plate (1) with central hollow cylinder. Rod (2). Short hollow cylinder (3) with hook. Light plastic 20-cm ruler (4) with hole in its upper end. Square plate with adjustable needle pointer (5). The Glossary of Prosthodontic Terms defines the physiologic rest position (PRP) as “the mandibular position assumed when the head is in an upright positi...