Volume Rendering of Curvilinear and Unstructured Data", PhD Thesis, University of Illinois at Urbana-Champaign, 1992.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....an isomorphism type would be the least degree of any presentation in that type. For instance, the degree of dense linear orderings without endpoints is clearly 0 since we can computably represent Q . Linda Jean Richter was the rst author to systematically study the degrees of structures. Richter [90]) It turns out that some types have degrees and some do not. One example of a structure with a degree is a nitely presented group. If G = hx 1 ; x n jy 1 ; y m i is nitely presented then its degree is simply the degree of its word problem. Note that if H is isomorphic to G then we only ....

....to obtain generators of H and through this, H can compute the open diagram of G. Below are some other examples of structures with nontrivial degrees. We obtain these examples using a preliminary theorem of Richter. This theorem encapsulates the so called combination method. Theorem 3. 1 (Richter [90, 91]) Suppose (i) and (ii) below hold for a degree a and a theory T over a nite language L. Then there is a structure of L whose isomorphism type has degree a. i) There is a in nite computable sequence of nite structures fA i : i 2 Ng such that A i is not embeddable into A j for i 6= j. 15 ....

[Article contains additional citation context not shown here]

Richter, L, Degrees of Structures, Ph. D. Thesis, University of Illinois at Urbana-Champaign, 1979.

....isomorphism type would be the least degree of any presentation in that type. For instance, the degree of dense linear orderings without endpoints is clearly 0 since we can computably represent Q. Linda Jean Richter was the first author to systematically study the degrees of structures. Richter [150]) It turns out that some types have degrees and some do not. One example of a structure with a degree is a finitely presented group. If G = hx 1 ; x n jy 1 ; ym i is finitely presented then its degree is simply the degree of its word problem. Note that if H is isomorphic to G then we ....

....to obtain generators of H and through this, H can compute the open diagram of G. Below are some other examples of structures with nontrivial degrees. We obtain these examples using a preliminary theorem of Richter. This theorem encapsulates the so called combination method. Theorem 3. 1 (Richter [150, 151]) Suppose (i) and (ii) below hold for a degree a and a theory T over a finite language L. Then there is a structure of L whose isomorphism type has degree a. i) There is a infinite computable sequence of finite structures fA i : i 2 such that A i is not embeddable into A j for i 6= j. ii) ....

[Article contains additional citation context not shown here]

Richter, L, Degrees of Structures, Ph. D. Thesis, University of Illinois at Urbana-Champaign, 1979.

....deployment, one based on fundamentally new principles. Because technology is rapidly changing and business requirements are more demanding, a process for architecting these new systems is now essential. No longer can systems be simply assembled from components without consideration of the whole [Foot97]. Architecture is not the creation of boxes, circles, and lines, laid out in slide presentation [Shaw96] Shaw96a] Architecture imposes decisions The term architecture is so overused in the software business, that it has become a clich. There are official descriptions of software architecture ....

....system into full production. n Operation and maintenance a phase of the system in which all functionality is deployed and the full bookable benefits are being accrued. n Continuous migration an activity that continuously makes improvements to the system, within the architectural guidelines [Foot97]. Without a framework for defining architecture and the steps in which it participates, it is difficult to grasp the impact architecture has on the outcome of the system process. THE VISION OF THE SYSTEM The purpose, focus, assumptions, and priorities of a software project are essential elements ....

"Big Ball of Mud," B. Foote and J. Yoder, University of Illinois at Urbana--Champaign, September 1997.

....one based on fundamentally new principles. Because technology is changing at a rapid pace and user business requirements are becoming more demanding, the architecting these new systems is now essential. No longer can systems be simply assembled from components without consideration of the whole [Foot97]. The subject of the integration of heterogeneous manufacturing systems is not only complex it is convoluted and confusing. By focusing on the architecture of the system, the design and development processes have a place to return to when this situation occurs. The term architecture is so ....

....system into full production. n Operation and maintenance a phase of the system in which all functionality is deployed and the full bookable benefits are being accrued. n Continuous migration an activity that continuously makes improvements to the system, within the architectural guidelines [Foot97]. Without a framework for defining architecture and the steps in which it participates, it is difficult to grasp the impact architecture has on the outcome of the system process. Niwot Ridge Consulting, September 2000 18 THE VISION OF THE SYSTEM The purpose, focus, assumptions, and priorities ....

"Big Ball of Mud," B. Foote and J. Yoder, University of Illinois at Urbana--Champaign, September 1997.

....accessed by the environment. Current Context and Root Context are references to the local naming context, and to the root naming context respectively. 2K s global naming system is organized in contexts. Each environment has its local context through which it accesses the global naming system [8]. Machine Dependent is a reference to the component that takes the machine dependent actions correspondent to the actions occurring in an environment. Figure 2(a) depicts the UML class de nition of an environment. Appendix A.1 describes the interface of an environment in OMG CORBA IDL [9] ....

....An environment keeps a reference to its current naming context and to a root naming context. The current context is a cache for the names being used by the environment and is independent of the way the naming system is implemented. The 2K naming mechanism is conceived to be location independent [8]. A current context is a local context, otherwise known as a clerk through which the global 2K naming system is accessed. 3.7 Machine Dependent Component 2K is a distributed meta operating system in the sense that it can run on top of existing OS s. Typically, environments need certain services ....

M. Z. Hydari. Design of the 2k naming service. Master's thesis, University of Illinois at UrbanaChampaign, 1999.

....Enterprise Java Beans aims at leveraging the transactional database support of enterprise networks [14] EJB creates an enterprise backbone logic by hooking together legacy applications wrapped in Java. EJB is not about dynamic, runtime, discovery and recon guration of components. Globe [6] is based on distributed shared objects. The emphasis of Globe is on objects and on their policies for distribution, replication and coherence, rather then on adaptation to user requirements. Globus [4] and Legion [12] aim at building a software architecture for grid environments. Both systems do ....

M. Z. Hydari. Design of the 2k naming service. Master's thesis, University of Illinois at UrbanaChampaign, 1999.

No context found.

Volume Rendering of Curvilinear and Unstructured Data", PhD Thesis, University of Illinois at Urbana-Champaign, 1992.

No context found.

Richter, L, Degrees of Structures, Ph.D. Thesis, University of Illinois at UrbanaChampaign, 1979.

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