In recent years, integrated circuit technology has spawned the development of many low cost and high performance microprocessors and microcontrollers. With these devices, there is an increasing interest in the implementation of distributed control networks, utilizing microprocessors in the control nodes. In this work, a low-cost liquid crystal display (LCD) unit utilizing a Hitachi HD44780 controller was designed to provide a visual display node for COLAN (Control Oriented Local Area Network). An Intel 8051 microprocessor was used to provide control services for the display and also to provide a communication interface to the network. The users in the COLAN network can remotely display and easily control the panel of LCDs by sending commands to the display control nodes through the local area network. This capability is especially useful to provide instructions to operators, provide synchronization for human interaction, and for use in locating faults in the system. The software necessary for implementing display and control functions has been developed, including file transfer and text transfer between supervisory nodes and display nodes. This software fits within the task structure associated with the COLAN communication protocols. The display node has been designed, fabricated, and tested in a system involving multiple COLAN nodes and a personal computer host. The emphasis of this work is in the implementation of the display control node and HD44780 controller including hardware and software developments. The hardware work includes designing and interfacing, and the software work includes high level and low level language programming. / Graduation date: 1993

Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Norman F. Schneidewind. Includes bibliographical references (p. 51). Also available online.

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A Hybrid Meshnet LAN, a new local area network architecture, has been proposed by Dr. Cheoul-Shin Kang and Dr. James Herzog. It provides for distributed control hybrid architecture which is good for effective load sharing under various local area network environments. Hybrid Meshnet has a dual channel structure, a token ring and a collection of full-duplex data links. The multiple high-speed transmissions, private and secure communications and large volume of data transmission capability are some of the features of Hybrid Meshnet. The design features necessary to implement the network interface unit (NIU) for the Hybrid Meshnet are presented. The unit is a multiprocessor system with each processor having a RISC-like architecture. Various asynchronous activities are distributed among the three processors resulting in a balanced network interface unit. Except for the time critical and non-varying functions, all the functionalities of the unit are programmable. The hybrid meshnet protocol is still in the development stage. The programmable unit will accommodate the changes in the protocol. The network interface unit will be compatible with most of the host computer systems. The study is one step forward in the direction of Hybrid Meshnet Local Area Network's implementation. / Graduation date: 1993

Thesis (Ph. D.)--Ohio University, June, 1996. / Title from PDF t.p.

Thesis (M.S.)--Rochester Institute of Technology, 1992. / Typescript. Includes bibliographical references and index.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 119-123). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaf 66). Also available via the Internet.