Comparative performance of commonly used portable coffee harvesters

Performance Evaluation of Commonly Used Oil Ram Press Machines

The ram-press technology for oil expression has received a lot of attention in many African countries during the last two decades. The technology is based on manually operated mechanical presses, which employ a slider-crank mechanism in two different configurations. The original machine was invented by Karl Bielenberg in 1985 and since then continuous design improvements have been made to impro...

Deposition of carbon nanotubes in commonly used sample filter media

There is no single standard technique or methodology to characterize the size, structure, number, and chemical composition of airborne carbon nanotubes.  Existing analytical instruments and analytical techniques for evaluating nanoparticle concentrations cannot simultaneously provide morphology, state of agglomeration, surface area, mass, size distribution and chemical composition data critical...

Commonly Used Distributions

Portable Wind Energy Harvesters for Low-Power Applications: A Survey

Energy harvesting has become an increasingly important topic thanks to the advantages in renewability and environmental friendliness. In this paper, a comprehensive study on contemporary portable wind energy harvesters has been conducted. The electrical power generation methods of portable wind energy harvesters are surveyed in three major groups, piezoelectric-, electromagnetic-, and electrost...

Bacterial contamination of four commonly used dental materials

Bacterial contamination of four commonly used dental materials Dr. M. Ghavam* - Dr. M. Aligholi** *- Associate Professor of Operative Dentistry Dept. - Faculty of Dentistry – Tehran University of Medical Sciences. **- The member of Microbiology Dept. Faculty of Medicine – Tehran University of Medical Sciences. Background and Aim: Bacterial contamination of dental materials and devices used in d...