in this research, tribological characteristics of ni-p electroless coating and double-layered ni-p/ni-b electroless coating were studied. for this purpose, ni-p electroless coating with 25 μm thickness was initially applied to the surface of steel ck45 samples; then, a double-layered ni-p/ni-b electroless coating, including inner layer of ni-p with 15 μm thickness and outer layer of ni-b with 1...

In this monograph, Northrop summarizes the work on proteolytic enzymes and on the bacteriophage which has been carried out in his laboratory at the Rockefeller Institute for Medical Research in Princeton during the past ten years. After a brief introduction, dealing with the fundamentals of enzymatic catalysis, the preparation in crystalline or purified form and the properties of the following ...

We discuss a physical implementation of the Crystalline robot system. Crystalline robots consist of modules that can aggregate together to form distributed robot systems. Crystalline modules are actuated by expanding and contracting each unit. This actuation mechanism permits automated shape metamorphosis. We describe the Crystalline module concept and a physical implementation of a robot syste...

We have generalised our x-ray diffraction results from amorphous/ crystalline multilayers, to include random interfacial disorder of a gaussian type. A general relation is obtained which can be applied to both crystalline/crystalline and crystalline/amorphous multilayers. This gaussian fluctuation or "roughness" can strongly reduce the long-range atomic order along the growth direction of the m...