Anıl Uzal, 030070012, 6th Week

The System Enabler: (18.03.2011 ; 00:50)

The function of the system enabler is to provide universal high level services of data management, data communication and data representation, for the CIMS applications built on it. The abstract/transition module is used for integrating existing application and relevant data into the platform of system enabler. The system enabler layer makes the upper applications is independent of the lower supporting environment, so that the upper applications possesses an excellent openness and portability. The major advantages to adopt system enabler is as follows:

(1) The data sharing and application integrating in CIMS can be effectively implemented by means of the system enabler layer.

(2) The developing and running of the upper applications can be supported by the uniform access to system resources and shared resources provided by the system enabler.

(3) The life circle of the application development can be greatly reduced and the development efficiency can be greatly increased and the information and function integration of CIMS can be well implemented, because the system enabler layer can not only provide shared data management, data comniunication and data representation service but also support various application services. (Li Gui, Yin Chaowan, Zheng Huaiyuan, 1997 IEEE International Conference on Intelligent Processing Systems, Issue Date 28-31 Oct. 1997, page 834)

Data Dictionary: (18.03.2011 ; 01:40)

Described in this paper is a Data Dictionary/Directory (DD/D) which provides such a method of centralized control over data management.

A DD/D is a centralized repository of information about data descriptions such as meaning, relationships to other data, responsibility, origin, usage, and format. It is a basic tool within the database environment that assists company management, data-base administrators, systems analysts, and application programmers in effectively planning, controlling, and evaluating the collection, storage, and use of the data resource. (Uhrowczik, P. P.; IBM Systems Journal, Vol. 12, Issue 4, page 332)

Galvanic Corrosion: (20.03.2011 ; 00:06)

Galvanic corrosion can be defined simply as that corrosion that occurs as a result of one metal being in electrical contact with another in a conducting corrosive environment. The corrosion is stimulated by the potential difference that exists between the two metals, the more noble material acting as a cathode where some oxidizing species is reduced, the more active metal, which corrodes, acting as the anode. (Oldfield, J. W., “Electrochemical Theory of Galvanic Corrosion”, Galvanic Corrosion, ASTM STP 978, H. P. Hack, Ed., American Society for Testing and Material, Philadelphia, 1988, page 5)

Solid Freeform Fabrication: (20.03.2011 ; 01:07)

Any method of manufacturing solid mechanical parts without part-specific tooling or human intervention. The version called layered manufacturing is based on additive processes that build parts in layers. Rapid prototyping (RP) emphasizes speed and the initial applications of the technology, while the newer rapid prototyping and manufacturing (RP&M) stresses applications that results in functional parts, rather than models.

Solid freeform fabrication technologies use a computer graphic representation and simple stock material (powder, liquid, gas, sheets, and so on) to fabricate complex parts. Photopolymer systems build shapes using light to selectively solidify liquid photocurable resins. A number of other systems prefer powders as their stock material. Some examples of powder-based techniques are selective laser sintering [Fig. 3], 3-D printing, and 3-D laser cladding. Lamination systems operate with a variety of feedstock from paper sheets to metal plates. SFF deposition techniques include extrusion, ink-jets, 3-D welding, gas, and plasma spray [Table 11]. (Crawford, R.H.; Beaman, J.J.; “Solid Freeform Fabrication”, Spectrum, IEEE, Volume 36, Issue 2, page 36)