Nanotechnology

Nanotechnology refers broadly to a field of applied science and technology whose unifying theme is the control of matter on the atomic and molecular scale, normally 1 to 100 nanometers, and the fabrication of devices within that size range. It is a highly multidisciplinary field, drawing from fields such as applied physics, materials science, interface and colloid science, device physics, supramolecular chemistry, chemical engineering, mechanical engineering, and electrical engineering. Much speculation exists as to what may result from these lines of research. Nanotechnology can be seen as an extension of existing sciences into the nanoscale, or as a recasting of existing sciences using a newer, more modern term.
Two main approaches are used in nanotechnology. In the "bottom-up" approach, materials and devices are built from molecular components which assemble themselves chemically by principles of molecular recognition. In the "top-down" approach, nano-objects are constructed from larger entities without atomic-level control. The impetus for nanotechnology comes from a renewed interest in Interface and Colloid Science, coupled with a new generation of analytical tools such as the atomic force microscope (AFM), and the scanning tunneling microscope (STM). Combined with refined processes such as electron beam lithography and molecular beam epitaxy, these instruments allow the deliberate manipulation of nanostructures, and led to the observation of novel phenomena.
Examples of nanotechnology in modern use are the manufacture of polymers based on molecular structure, and the design of computer chip layouts based on surface science. Despite the great promise of numerous nanotechnologies such as quantum dots and nanotubes, real commercial applications have mainly used the advantages of colloidal nanoparticles in bulk form, such as suntan lotion, cosmetics, protective coatings, drug delivery[1], and stain resistant clothing.

Swami Vivekananda

Swami Vivekananda (Sanskrit: स्वामि विवेकानन्द, Svāmi Vivekānanda) (January 12, 1863 – July 4, 1902), whose pre-monastic name was Narendranath Dutta (Nôrendrônath Dôt-tô), was one of the most famous and influential spiritual leaders of the philosophies of Vedanta and Yoga. He was the chief disciple of Ramakrishna Paramahamsa and the founder of Ramakrishna Math and Ramakrishna Mission. He is a major figure in the history of the Hindu reform movements.
While he is widely credited with having uplifted his own nation, simultaneously he introduced Yoga and Vedanta to America and England with his seminal lectures and private discourses on Vedanta philosophy. Vivekananda was the first known Hindu Sage to come to the West, where he introduced Eastern thought at the World's Parliament of Religions, in connection with the World's Fair in Chicago, in 1893. Here, his first lecture, which started with this line "Sisters and Brothers of America," ([1] - not his voice) made the audience clap for two minutes just to the address, for prior to this seminal speech, the audience was always used to this opening address: "Ladies and Gentlemen". It was this speech that catapulted him to fame by his wide audiences in Chicago and then later everywhere else in America, including far-flung places such as Memphis, Boston, San Francisco, New York, Los Angeles, and St. Louis.