There are several areas in the South African sugar industry where the ubiquitous variety, NCo 376, is beingsuperseded by newer varieties. Growers have a choice of varieties which have outyielded NCo 376 in trials under a wide range of conditions. There are others which have yielded more than NCo 376 in certain conditions. It is opportune to report the results of trials that have been conducted ...

The article presents material, which is based on the results of analysis literature sources automatic devices for regulating reactive power in supply systems. In addition, this provides information regarding operability developed circuits contactless and verification experimental study operation installations with their use. Also presented material about an a switching device control capacitor ...

In a novel dual bed reactor Fischer-Tropsch synthesis was studied by using two diffrent cobalt catalysts. An alkali-promoted cobalt catalyst was used in the first bed of a fixed-bed reactor followed by a Rutenuim promoted cobalt catalyst in the second bed. The activity, product selectivity and accelerated deactivation of the system were assessed and compared with a conventional single bed r...

A steady-state cross-flow reactor for ethylene epoxidation was simulated using industrial data (low oxygen/ethylene feed ratio) and pilot plant data (high oxygen/ethylene feed ratio). A comparison between the conventional fixed-bed reactor and the cross-flow reactor with two types of feeding modes was performed. The present study showed the possibility of enhancing the reactor yield by distribu...

The inevitable electrothermal coupling among capacitors in a bank will lead to nonnegligible errors the temperature as well lifetime prediction of individual capacitor. In this article, analytical thermal models with corresponding design for capacitor banks are proposed considering effect. First, measurement-based lump model and physical-model-based proposed. Then, help models, method matching ...

This paper presents the design of a 20 MHzhysteresis-controlled CMOS buck converter using pseudo ramp techniques for ultra-low power applications. The proposed buck converter can improve the transient response using hysteresis-controlled and fixed-voltage band techniques. Using pseudo ramp technique, pseudo inductor current signal can be produced to reduce the output voltage ripple. At the same...