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The Physical Science Study Committee (PSSC) was inaugurated at a 1956 conference at MIT to review introductory physics education and to design, implement, and monitor improvements. It produced major new physics textbooks, instructional movies, and classroom laboratory materials, which were used by high schools around the world during the 1960s ...
In character (STR and BSC) modes, the device relied on particular characters to define frame boundaries; in bit (HDLC and SDLC) modes earlier devices relied on physical-layer signals, while later devices took over the physical-layer recognition of bit patterns. A synchronous line is never silent; when the modem is transmitting, data is flowing.
DF-1 / DF1 protocol is an asynchronous byte-oriented protocol that is used to communicate with most Allen Bradley RS-232 interface modules. DF1 protocol consists of link layer and application layer formats. DF1 works over half duplex and full duplex modes of communication.
Electromagnetism – branch of science concerned with the forces that occur between electrically charged particles. Geophysics – the physics of the Earth and its environment in space; also the study of the Earth using quantitative physical methods; Magnetism – the study of physical phenomena that are mediated by magnetic field.
The mandatory IrPHY (Infrared Physical Layer Specification) is the physical layer of the IrDA specifications. It comprises optical link definitions, modulation, coding, cyclic redundancy check (CRC) and the framer. Different data rates use different modulation/coding schemes:
physical chemistry, dealing with physical processes and their relations in the science of physical chemistry; physics education, set of methods to teach physics; physical oceanography, is the study of physical conditions and physical processes within the ocean, especially the motions and physical properties of ocean waters
However, the term "physical" creates an unintended, somewhat arbitrary distinction, since many branches of physical science also study biological phenomena (organic chemistry, for example). The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.
In integrated circuit design, physical design is a step in the standard design cycle which follows after the circuit design.At this step, circuit representations of the components (devices and interconnects) of the design are converted into geometric representations of shapes which, when manufactured in the corresponding layers of materials, will ensure the required functioning of the components.