Educational knowledge space dedicated to mold injection technology.

Nita, Alexandra ; Raicu, Gabriel

1. INTRODUCTION

The Internet Society's Public Policy activities are based upon a fundamental belief that the Internet is for everyone. We envision a future in which people in all parts of the world can use the Internet to improve their quality of life because standards, technologies, business practices, and government policies sustain an open and universally accessible platform for innovation, creativity, and economic opportunity.

The target domain in this approach--injection molding is the most important commercial process for the production of three-dimensional plastic parts. It can be divided into four basic stages: plastification, injection, packing, cooling, and ejection.

The mechanical properties, among all the properties of plastic materials, are often the most important properties because virtually all service conditions and the majority of end-use applications involve some degree of mechanical loading. The basic understanding of stress-strain behavior of plastic materials is of utmost importance for a design engineer.

The authors want to develop a polymeric material on line encyclopedia, which is an open source application. This paper is a begining for sharing knowledge space and storage resources in educational web environment--Mold Injection Encyclopedia (MIE) run as wiki software which is a type of collaborative software that runs a wiki system. This typically allows web pages to be created and edited using a common web browser. It is usually implemented as a software engine that runs on one or more web servers, with the content generally stored in a relational database management system.

The majority of engines are open source, often available under the GNU General Public License (GPL); large projects such as TWiki and the Wikipedia engine, MediaWiki, are developed collaboratively. Many wikis are highly modular, providing APIs which allow programmers to develop new features without requiring them to be familiar with the entire codebase (www.isoc.org, 2009).

2. POLYMERIC MATERIAL ADVISER PROGRAM

The Polymeric Material Adviser (the acronym is PMA) was the starting point as primary database and the main reason for this new development because it describe the molding conditions for the thermoplastic and for the thermoset, the processing conditions.

[FIGURE 1 OMITTED]

PMA describes also the typical values for temperatures, the typical values of specific pressures on material, and the material change-over and cleaning of plasticizing cylinder. PMA improve the process solution including the selection of the injection molding material, the mechanical and the technological properties of the polymeric material. PMA has many and different polymeric materials on hand from several different suppliers, so we can choose easily which plastic is best suited for each application, as you can see in the figure 1 (Nita, 2009).

The system is architecturally based on MySQL database, a PHP scripting engine and an Apache web server. Functioning architecture is client-server for the software below and the interconnection making through an operating system, in our case UNIX, FreeBSD type. The main application architecture relies on the Open Source Framework built on PHP-MySQL tandem.

This computer program has been developed to search for the properly polymeric material, a database with many and more used polymeric materials, total flexibility of date's visualization, information about material properties and producer.

The database permits selective queries to generate a complete report for the right material. The database is Word Wide accessible to fulfill the purpose of the Academic demand in the field of Polymeric Materials. To achieve the functions of the program we use a series of scripts PHP carrying out the connection with the MySQL database, making a series of selections and queries to extract information.

3. SYNOPTICAL ANALYSIS ABOUT MIE KNOWLEDGE MANAGEMENT

The next evolutionary step for our educational purpose is Mold Injection Encyclopedia (MIE). Beyond PMA purpose, this new approach consist, generally speaking, in a virtual community, e-community or online community which is a group of people that primarily interact via communication media such as letters, telephone, email or Usenet rather than face to face.

[FIGURE 2 OMITTED]

If the mechanism is a computer network, it is called an online community. Virtual and online communities have also become a supplemental form of communication between people who know each other primarily in real life. A computer-mediated community (CMC) uses social software to regulate the activities of participants. Significant socio-technical change has resulted from the proliferation of Internet-based social networks (Raicu & Nita, 2008).

Social technologies or conversational technologies used in organizations, in particular a network-centric organization, are other terms used to describe knowledge creation and storage that is carried out through collaborative writing. Constructivist learning theorists such as Vygotsky; Leidner & Jarvenpaa explained that the process of expressing knowledge aids its creation and conversations benefit the refinement of knowledge. Conversational KM fulfills this purpose because conversations, e.g. questions and answers, become the source of relevant knowledge in the organisation and support work units and the individual knowledge worker. An extensive comparison was made during last 6 years using the global data in Google trends labs, figure 2 and table 1 (www.cmsmatrix.org, 2009).

The agglomeration of all online communities is sometimes called the metaverse. The more specific term collaborative software applies to cooperative information sharing systems, and is usually narrowly applied to the software that enables collaborative work functions. Distinctions between usage of the terms "social" and "collaborative" are in the applications or uses, not the tools themselves, although there are some tools that are only rarely used for work collaboration.

The vast majority of wiki implementations are based on the standard design of multimedia encyclopaedia but for specific needs in molding engineering field new methods are necessary.

Mold Injection Encyclopaedia is the first implementation in technical field using WikiProject "Semantic MediaWiki". It provides a common platform for discussing extensions of the MediaWiki software that allow for simple, machine-based processing of Wiki content. This usually requires some form of "semantic annotation", but the special Wiki environment and the multitude of envisaged applications impose a number of additional requirements. It is understood that ad-hoc implementations may sometimes solve single problems, but agreeing on common editing syntax, underlying technology, exchange formats, etc. bears huge advantages for all participants.

Ontologies are considered as one of the pillars of the Semantic Web, although they do not have a universally accepted definition. A (Semantic Web) vocabulary can be considered as a special form of (usually light-weight) ontology, or sometimes also merely as a collection of URIs with an (usually informally) described meaning.

Ontologies on semanticweb.org are usually assumed to be accompanied by some document in a formal ontology language, though some ontologyes do not use standardised formats for that purpose. A list of documents that are considered ontologies in this wiki is given below.

4. CONCLUSION

The overall objective of the project is to develop a single solution for semantic annotation that fits the needs of most Wikimedia projects and still meets the Wiki-specific requirements of usability and performance.

The Semantic Web is the extension of the World Wide Web that enables people to share content beyond the boundaries of applications and websites. It has been described in rather different ways: as a utopic vision, as a web of data, or merely as a natural paradigm shift in our daily use of the Web.

5. ACKNOWLEDGEMENT

Ideas presented in the paper are the result of the research activities of the ID1223 project, under the supervision of the National University Research Council (CNCSIS), Romania, (Oanta et all., 2007).

6. REFERENCES

Nita, A. (2009). Expert system for molded polymeric material, Indexed by Proc. SPIE Vol. 7297, 72970Z, Available from: http://spiedigitallibrary.aip.org/dbt/dbt.jsp?KEY=PSISDG& Volume=7297&Issue=1&bproc=volrange&scode=7200++7297, 2009-01-07

Raicu, G.; Nita, A. (2008). Improve economical performance using knowledge management, Safety, Security and Quality Ojectives of MET Institutions, pp 567-574, ISBN 978-975441-256-7, International Maritime Lecturers' Association 16th Conference on MET, Izmir, Turkey

*** (2009) http://www.cmsmatrix.org - CMS comparison tools, Accessed on: 2009-06-20

*** (2009) http://www.isoc.org - Internet Society, Accessed on: 2009-06-20

Tab. 1. Software features comparison

 Software Spam prevention Page User- Document
 Name access customizabl renaming
 control e interface

DokuWiki Yes, blacklist Yes, Partial-- Yes,
 optional CSS, PHP; plugin
 heavily
 documented
 PHP API

MediaWiki Yes, URL Yes Partial-- Yes, old
 blacklist, word many page
 blacklist, IP features are becomes a
 blocking, user- redirect
 captchas (as customizabl
 used on e, templates
 wikinews)

MoinMoin Yes, BadContent Yes Yes-- Yes, old
 filtering via Themes, page can
 Regular templates, be a
 Expressions CSS, XSLT redirect

PmWiki Yes, word/URL Yes Yes, themes, Yes,
 block (addon, per page/per module
 auto-upd. group CSS
 database),
 URL-approval
 (option),
 encrypt e-mails
 (addon),
 nofollow,
 Captcha (addon)

TWiki Yes, IP Yes Templates, Yes, fixing
 blacklist, skins, user backlinks
 content by CSS
 regexp,
 excessive
 activities,
 scripted
 registration
 hidden e-mail
 addresses