Friction stir welding (FSW) is a solution to overcome the problems of AA 6061 welding. When initial temperature T0 material increased during FSW process while parameters are kept constant then parameter value can be lowered. was varied by Troom temperature, 50 0C, 75 100 0C and 125 0C. The weld joint design form square butt joint. By using this approach higher T0, with being constant, produce p...

Changes in fluidization behaviour of green peas particulates with change in moisture content during drying were investigated using a fluidized bed dryer. All drying experiments were conducted at 50 + 2 0C and 13 + 2 % RH using a heat pump dehumidifier system. Fluidization experiments were undertaken for the bedheights of 100, 80, 60 and 40 mm and at 10 moisture content levels. Fluidization beha...

Composites of calcinated bovine bone derived hydroxyapatite (BHA) doped 1 and 2 wt% MgF2 were prepared by a sintering process. Microstructure crystallographic analyses along with measurements density, compression strength, microhardness carried out in the produced samples. The experimental results indicated beneficial effect matrix BHA reflected significant increase strength up to 143 MPa 313 H...

In the present work, a continuous microreactor was designed to study the effect of miniaturization on bioreactors for the production of invertase from S. cerevisiae MM01 in a microfluidic environment. In order to simplify the analysis and considering typical production strategies at laboratory scale, 250 ml baffled flasks and a 2.5 l batch bioreactor were used as bench-scale models for the perf...

The influence of temperature on the indentation size effect is explored experimentally. Copper is indented on a custom-built high-temperature nanoindenter, at temperatures between ambient and 200 0C, in an inert atmosphere that precludes oxidation. Over this range of temperatures, the size effect is reduced considerably, suggesting that thermal activation plays a major role in determining the l...

This paper presents a 10-bit pipeline ADC using double sampling technique to achieve a conversion rate of 40 MS/s at 2.5-V supply. The opamps are two-stage with folded-cascode as the first stage and feature techniques such as common-mode stabilized active load, crosscoupled cascode connection, and close-loop pole placement. MOS switches are driven by bootstrapping circuits that do not subject t...

Tujuan dari penelitian ini adalah untuk mengujii dan membandingkan pengaruh perbedaan suhu terhadap tingkat produktivitas induk ikan Guppy. Penelitian merupakan eksperimental, dengan menggunakan Rancangan Acak Lengkap (RAL). Ikan Guppy yang digunakan memiliki berat rata-rata 1,1 g. dipelihara selama 40 hari empat perlakuan tiga ulangan yaitu S0 (26 0C), S1 (28 S2 (30 0C) S3 (32 0C). Hasil menun...

Relevance. Cold exposure increases sympathetic activity and blood pressure. It can also promote intensification of hypertension symptoms its progress in winter. However, the mechanisms this phenomenon are poorly understood. Intention: To determine dynamics cardiovascular parameters young people with different initial autonomic regulation heart rate during experimental general cold exposure. Met...