In quantum physics one meter is also one meter, but the elimination of distance, or the approximation or acceptance of something, changes that object or at least contains a wider spectrum of interpretative possibilities, so that the comparative of focused concretization is a well facetted ambiguity in the sense of quantum physics. Nigel Van Wieck's works function in a similar manner. On first glance we seem to see just what we see. The realistic pictures reveal for us a view of people on a beach, or at work, or involved in recreational activities, or in their domestic surroundings, or in public places.
Concluding Thoughts One of the entertaining things about the enterprise Java world is the huge amount of activity in building alternatives to the mainstream J2EE technologies, much of it happening in open source.
A lot of this is a reaction to the heavyweight complexity in the mainstream J2EE world, but much of it is also exploring alternatives and coming up with creative ideas. A common issue to deal with is how to wire together different elements: A number of frameworks have taken a stab at this problem, and several are branching out to provide a general capability to assemble components from different layers.
These are often referred to as lightweight containers, examples include PicoContainerand Spring. Underlying these containers are a number of interesting design principles, things that go beyond both these specific containers and indeed the Java platform.
Here I want to start exploring some of these principles. The examples I use are in Java, but like most of my writing the principles are equally applicable to other OO environments, particularly.
Components and Services The topic of wiring elements together drags me almost immediately into the knotty terminology problems that surround the terms service and component. You find long and contradictory articles on the definition of these things with ease.
For my purposes here are my current uses of these overloaded terms. I use component to mean a glob of software that's intended to be used, without change, by an application that is out of the control of the writers of the component.
By 'without change' I mean that the using application doesn't change the source code of the components, although they may alter the component's behavior by extending it in ways allowed by the component writers.
A service is similar to a component in that it's used by foreign applications. The main difference is that I expect a component to be used locally think jar file, assembly, dll, or a source import.
A service will be used remotely through some remote interface, either synchronous or asynchronous eg web service, messaging system, RPC, or socket. I mostly use service in this article, but much of the same logic can be applied to local components too.
Indeed often you need some kind of local component framework to easily access a remote service. But writing "component or service" is tiring to read and write, and services are much more fashionable at the moment. A Naive Example To help make all of this more concrete I'll use a running example to talk about all of this.
Like all of my examples it's one of those super-simple examples; small enough to be unreal, but hopefully enough for you to visualize what's going on without falling into the bog of a real example.
In this example I'm writing a component that provides a list of movies directed by a particular director. This stunningly useful function is implemented by a single method.
Then it just hunts through this list to return those directed by a particular director. This particular piece of naivety I'm not going to fix, since it's just the scaffolding for the real point of this article. The real point of this article is this finder object, or particularly how we connect the lister object with a particular finder object.
The reason why this is interesting is that I want my wonderful moviesDirectedBy method to be completely independent of how all the movies are being stored. So all the method does is refer to a finder, and all that finder does is know how to respond to the findAll method.
I can bring this out by defining an interface for the finder. In this case I put the code for this in the constructor of my lister class. I'll spare you the details, after all the point is just that there's some implementation.
Now if I'm using this class for just myself, this is all fine and dandy.
But what happens when my friends are overwhelmed by a desire for this wonderful functionality and would like a copy of my program?
If they also store their movie listings in a colon delimited text file called "movies1. If they have a different name for their movies file, then it's easy to put the name of the file in a properties file. But what if they have a completely different form of storing their movie listing: In this case we need a different class to grab that data.
But I still need to have some way to get an instance of the right finder implementation into place. The dependencies using a simple creation in the lister class Figure 1 shows the dependencies for this situation.
The MovieLister class is dependent on both the MovieFinder interface and upon the implementation.Structuring and introduction. An introduction is like a guidebook to your whole assignment.
It gives background information into your topic area and outlines all the ideas you are going to present.
This handout will help you determine if an assignment is asking for comparing and contrasting, generate similarities and differences, and decide a focus. each with its own requirements. One of the most common is the comparison/contrast essay, in which you focus on the ways in which certain things or ideas—usually two of them—are similar. To arrive at the edge of the world's knowledge, seek out the most complex and sophisticated minds, put them in a room together, and have them ask each other the questions they are asking themselves. Structuring and introduction. An introduction is like a guidebook to your whole assignment. It gives background information into your topic area and outlines all the ideas you are going to present.
How to Write a Compare and Contrast Essay Outline: A Point-By-Point Organization. By point-by-point, we merely mean a comparison that concentrates on comparing and contrasting one factor in both subjects, and all at the same time!
As a reader, you’ll quickly follow its simple structure. An Introduction To The Main Idea. The Online Writing Lab (OWL) at Purdue University houses writing resources and instructional material, and we provide these as a free service of the Writing Lab at Purdue.
A comprehensive, coeducational Catholic High school Diocese of Wollongong - Albion Park Act Justly, love tenderly and walk humbly with your God Micah More often than not, the written assessment you undertake in Arts and Social Sciences subjects will take the form of an essay.
No matter what field of study you are engaged in, the same basic process can be used to plan and write your essay. In sharp contrast to the brooding, restrained quietude and desolation that lie just below the surface of Working Girls, the metaphorical Dancing centers on sensual, stylized movement, a heightened sense of ebullience and theatricality, and emphatic points of emotional and physical contact.