VACUUM TUBES AND THEIR CHARACTERISTICS

Types of Vacuum Tubes

Vacuum Drying Characteristics of Some Vegetables

In this research the drying of four kinds of vegetables was investigated in a vacuum dryer. The effect of temperature on drying rate of samples at various temperatures (30, 35 and 45 °C) was studied. Six thin-layer drying models were fitted to drying data and suitable model was selected from them. Then effective moisture diffusivity and ...

Modeling and Prediction of FRP Composite Cylinder tubes Crashworthiness Characteristics

In this paper, numerical simulation of FRP composite cylinder tubes progressive crushing processes is conducted using LS-Dyna. Details on the numerical modeling strategy are given and discussed. It is found that triggers introduced in the numerical simulation can effectively model the bevel trigger at the end of the tubular specimens. It is also found that two-layer finite element model based o...

Preanalytical management: serum vacuum tubes validation for routine clinical chemistry

INTRODUCTION The validation process is essential in accredited clinical laboratories. Aim of this study was to validate five kinds of serum vacuum tubes for routine clinical chemistry laboratory testing. MATERIALS AND METHODS Blood specimens from 100 volunteers in five different serum vacuum tubes (Tube I: VACUETTE, Tube II: LABOR IMPORT, Tube III: S-Monovette, Tube IV: SST and Tube V: SST II...

THRESHOLD LOGIC: FROM VACUUM TUBES TO NANOELECTRONICS Invited Paper

This paper reviews silicon implementations of threshold logic gates, covering several decades. It details numerous VLSI implementations including: capacitive (switched capacitor and floating gate with their variations), conductance/current (pseudo-nMOS, output-wired-inverters, and a plethora of solutions evolved from them), as well as many differential solutions. Nanoelectronic implementations ...