CAITA-2004 PURDUE

 

Conference on Advances in Internet Technologies and Applications, with special emphasis on E-Education, E-Enterprise,

E-Manufacturing, E-Mobility,

and related issues

 

 

Purdue, USA

July 8-11, 2004

Purdue University

 

 

 

General Chairman

Mileta Tomovic

Purdue University, USA

 

Program Chairman

Veljko Milutinovic, Fellow of the IEEE,

University of Belgrade, Serbia, SCG

                       

 

Opening Keynote Speaker

Dag von Lubitz, MedSMART, Inc.

 

 

Organizer

IPSI Belgrade, Serbia, SCG

Purdue University Conference Management Department, Indiana, USA

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ISBN: 86-7466-117-3

 

© 2004

IPSI Belgrade

Academic Mind

July 2004

 

 

 

 

 

 

 

http://www.ipsi.co.yu

email: office@ipsi.co.yu

 


Message from the Chairmen

 

 

   The field of e-business, e-education, and e-science in general is fast growing, and up to now it has been noticed that there is a large body of unpublished knowledge that needs an appropriate forum for its presentation. This was the main rationale behind the idea to organize the IPSI-2004 international conference series. The theme of this particular conference is synergistic interaction of Enterprise Knowledge, Modern Technologies, and the Internet.

 

   Authors have been invited from the following three groups: the most referenced computer scientists; the VIPs from important high-tech companies, and the young talents from a list prepared specifically for these conferences.

 

   A sign of appreciation goes also to all the people who worked hard for making this conference a success: Nenad Korolija, Jelena Krunic, Miroslav Radakovic, Aleksandar Stanic, Sanida Omerovic, Senad Omerovic, and others.

 

   Welcome to the CAITA-2004 PURDUE conference. We hope you will all enjoy the event as much as we have enjoyed in contributing to its preparation.

 

 

Mileta Tomovic, General Chairman

Veljko Milutinovic, Program Chairman

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

CAITA-2004 PURDUE, USA, July 8-11. 2004

 

 

 

Conference on Advances in Internet Technologies and Applications, with special emphasis on E-Education,   E-Enterprise,        E-Manufacturing, E-Mobility, and related issues

 

 

 

 

 

 

 

 

 

 

                                              Abstracts

 

                          IPSI Award Abstracts

 

                                                 Authors

 

                                               Schedule


Text Box: Abstracts


Neural Network Analogs, Resource Distribution Theory, and Functional Evolutionary Optimization Algorithms

Byron J. Adams

Modern advances in economic modelling coupled with computational string theory have led to highly predictable emergent properties that arise under non-stationary vortices that resemble neural networks in a surprising number of ways.  Similar to computational networks, neural networks can be modelled under evolutionary optimization schemes that, like economic models, describe various attributes of cost- benefit analyses.  Such paradigms are similar to behaviour modification and assessment models, including the prisoner’s dilemma, and even simpler associations, like tit-for-tat.  My research program takes a novel approach to evolutionary game theory and resource optimization schemes by using string theory algorithms to de-couple the resource allocation (inputs) from the resource uptake (outputs) aspects of these types f associations.  I show that the optimization of resource redistribution schemes can be modelled as a simple linear function, and that tests of the model fit experimental data with statistical significance greater than six-sigma.

 

A Thin Security Layer Protocol Over IP Protocol on TCP/IP Suite For Security Enhancement

Mohammad Al-Jarrah, Abdel-Karim R. Tamimi

In this paper, we proposed a thin security protocol (TSP) over IP protocol that enforces a data security through encryption. This protocol consists of two components. The first component manages and establishes a secure channel between any two communicating hosts. This component uses three-way handshaking and public key cryptography (PKC) to create virtual secure connection and security entity (SE). SE holds the secret key cryptography (SKC), and addresses of two hosts that share this SKC. The second component of TSP protocol encrypts and encapsulates the coming transport layer packet into TSP packets.  The TSP packet header consists only of two fields each of them is one bytes. The first field identifies the TSP packet types such as request, acknowledgement, transport layer data, or channel terminating packets. The second field carries information about the transport layer protocol.

 

Dynamic Aspect Oriented C++ for Safe Upgrading Without Restarting

Sufyan Almajali, Tzilla Elrad

This paper presents an extension to C++ to construct easily upgradeable systems without restarting. With current applications of the Internet, the need for new structures to achieve a high degree of dynamic adaptability becomes apparent. Here we propose to address the issue of modularization of Internet services whose implementation would otherwise be scattered in many different places. The advantage of such modularization is that these services become easier to control and adapt at runtime. The cost of extracting what otherwise would be scattered code and modularizing it is the need to provide mechanisms to quantify the points in the program where the code needs to run. In addition, the issue of switching from one system version to another safely is addressed. The paper presents the DAO C++ language - Dynamic Aspect Oriented C++ system, its implementation and its potential applications for dynamic applications upgrading.

 

 

Enviromentally-Induced Vibroacoustic Disease

Mariana Alves-Pereira, Nuno A. A. Castelo Branco

Vibroacoustic disease (VAD) is a whole body pathology caused by excessive exposure to low frequency noise (LFN), and characterized by the abnormal proliferation of extra-cellular matrices. Research into the effects of exposure on humans began within occupational settings, namely, aircraft technicians, pilots and flight attendants. However, numerous cases have now been documented in individuals who are environmentally exposed to LFN, and not occupationally exposed. The implications of an increasing number of ill individuals added to the inadequacy of noise-related legislation and policies, as well as the ignorance of mainstream physicians regarding VAD, has led an unsustainable and unethical status quo.

 

Reformulating Usability

David Ambaye

Over the past decade, the use of ethnography as a serious approach for narrating technological intervention in organisations has been evolving very firmly in a positive direction. In contrast, the use of ethnography for targeted research objectives such as theory building and testing is less common. This paper describes the design and implementation of a series of such ethnographic studies aimed specifically at building a new understanding of what is meant by the notion of system usability. The use of analytical techniques known as usability scenarios that serves as the basis for this reformulation is also described.  Finally, a new definition of system usability is proposed and twelve key dimensions are described.

 

Simulation Supported Optimization of Container Storage Place

Krzysztof Amborski

Numerical optimization of all activities taking place in container terminal enables – among others – proper design of routes for terminal vehicles transporting containers to and from storage place and performing loading operations on it. Storage place in container terminal is used to store containers, which cannot be taken out within short time. Because storage place is one of the parts of the terminal, its simulation should work in a system describing whole terminal. In simulation of storage place there are two crucial points: synchronization of events and optimization of vehicles movements. Because some events can occur simultaneously, it is indispensable to introduce priorities in their management. Therefore highest priority has been attached to truck service (i.e. loading containers on trucks), lowest priority – to the transport of containers inside storage place. Optimization procedures ensuring full dynamic evidence of containers being on the terminal enable best use of terminal vehicles. In this paper two quality indices are taken into account – first minimizing energy, second minimizing time of the service. First index is deciding when there is reserve in time and therefore cost of loading is prevailing. Second – when the terminal is almost full of containers waiting for immediate service. 

 

 

 

Using Pattern to Reduce Compilation Dependencies in Large Scale C++ Project

Zeeshan Amjad

Making large scale project is challenging task. There are lots of problems in large scale projects, which are not visible in small projects. One such problem is compilation time that became very large if project is not organized properly. Design Patterns, which helps to make logical design of project, can also be used to manage the physical dependencies of a large scale C++ project.

 

An Experience in the Evaluationof E-Learning for IT Training and Certification

Louiza An, Luis G.Restrepo

Looking to promote within the country a socially wide ranging IT exposure that would be sustainable and have a positive impact on the country’s development, the Colombian Government was inspired by India’s experience in the development of its own successful Information Technology sector and went on to construct a programme called the ‘Connectivity Agenda’. This programme is comprised of the following six strategies: infrastructure access; education and training; e-commerce; e-government; boosting the IT industry and increasing Colombia’s website coverage. One of the components of the Education and Training strategy is the National Project of Training and Certification in Information Technology which looks to train, to an international standard, some 5000 professionals within 7 years. After a year of development the Project’s advances were evaluated in various cities around the country. Using the evaluation from one of those cities we have set out the following, principal results which can act as a reference for other countries who wish to implement similar IT projects.

 

E-Commerce: A Brave New World

Timothy Asiedu

The essence of this paper is to explore the business and the technologies associated with E-commerce in a developing like Ghana. In analysing the usage of e-commerce in Ghana, a critical study of the target industries like Banks, Mining, Insurance, Courier, Internet Cafes’, etc will be carried out. In considering the target industries, the category of users in those industries will also be looked at. Although E-commerce hasn’t been with us for long, the rate at which it is being developed requires a study of its socio-economic impact in a developing country like Ghana.

 

 

 

 

 

Weblogs, RSS (Really Simple Syndication) Specifications, OPML, and the Development of Weblog Ecosystems

Douglas Bass

The phenomenon of weblogs (or "blogs") has rapidly developed over the past year, with the development of a number of technologies that not only facilitate online journals, but promise to revolutionize the internet experience by greatly increasing the speed at which new content is delivered and received.  This paper will describe the development of the RSS (Really Simple Syndication) specifications, the growth in the use of Outline Processor Markup Language (OPML), and the development of environments for ranking the relative importance of blogs (commonly known as blog ecosystems).  The relationship between the blog community and traditional media channels will also be examined.

 

Managing Contribution

William G. Beazley

This paper is an overview of a management philosophy based on contribution, rather than cost.  Contribution, as I define it, is intuitively simple and satisfying: Contribution is the value added to an expected opportunity to deliver products and services.  For comparative purposes, contribution is measured by the net present value of the expected value of the value delivery. Contribution Analysis is the study of activity impact on expectations of delivered (or returned) value.

 

NEESgrid – Using Grid Technologies to Build the National Virtual Collaboratory for Earthquake Engineering

Cristina Beldica

NEESgrid is the system integration component of the George E. Brown, Jr., Network for Earthquake Engineering Simulation (NEES), a national research facilities program supported by the US National Science Foundation. Its objective is to create a virtual laboratory for earthquake engineering research, by linking the state-of-the art testing facilities distributed across the United States in addition to high performance computational resources and data repositories. The key element of NEESgrid is a powerful middleware architecture underlying the entire system that supports higher-level information services accessible by end users; is built upon the standards emerging from the Globus Project and the NSF Middleware Initiative (NMI); and is designed to be scalable and extensible.

 

Impact of E-business, E-education, and E-science Upon Traditional Native American and Hispanic Cultures

Irene I. Blea

This presentation explores the impact of e-business, e-education, e-science upon traditional Native American and Hispanic US cultures.  More specifically, its focus is upon the gaps, lags and advances of technological knowledge and implementation.  In some ways the advances have leveled the playing field between males and females, but has distanced the young from the old.

Visual Literacy Merging Global Cultures

Peggy Blood

In the increasingly digitized world of higher education it is time we rethink the traditional education delivery system. Spurring of technology has contributed to pedagogical delivery, not its’ structure advancement.  Academia moves slowly in adjusting to change.  How can technology structure and deliver really great learning experiences in the humanities? Teaching in the humanities should be a global collaboration, i.e., a professor who has lived, experienced and been educated in Russia would be the sole teacher of Russian culture. Thus, students will objectively compare and contrast Russian philosophical thoughts with those of Asians, Americans, and etc professors. The bias is natural and is not skewed to one side.

 

The Problems and Benefits of Outsourcing Technology Jobs

Thomas D. Brumett

Much of the discussion regarding the outsourcing of jobs by US companies is focused on the resulting loss of jobs to the US workforce.  This deeper look at this trend, particularly in the high technology work place addresses the longer term impact on innovation, competitiveness, productivity and education.  If properly applied, outsourcing can work to the benefit of technology professionals and their employers; if misapplied outsourcing can be first steps leading to technical obsolesce of entire industries in the US.

 

Formal Description of the E-learning Adaptive Web System

 

Miroslav Bures, Ivan Jelinek

 

This article deals with formal description of the adaptive web system. Adaptive web system monitors particular user’s behavior and characteristics. Based on them, the system compiles a resultant adapted document. This document corresponds to user’s qualification and capability, preferences and his/her specific needs. For example, we can adapt user interface of document, its information content and layout, topology of hypertext or other features. The aim of using of adaptive approach to student in E-learning is to increase effectiveness of E-learning process, to improve its ergonomic quality and to adapt E-learning process for the disabled students. The aim of our work is to create a system for automated implementation of adaptive web systems. It represents a non-trivial engineering process, which needs to establish a formal description of the system, like in many other scopes of computer science. Beside that, formal description of adaptive web system is needful in other cases, for example exact description of adaptive document behavior.

 

 

 

 

 

 

Advanced Computational Modeling of Vapor Deposition in a High-Pressure Reactor

Beatriz H. Cardelino, Craig E. Moore, Sonya D. McCall, Carlos A. Cardelino, Nikolaus Dietz, Klaus Bachmann

In search of novel approaches to produce new materials for electro-optic technologies, advances have been achieved in the development of computer models for vapor deposition reactors under microgravity conditions. Numerical simulations are invaluable tools for costly and difficult processes, such as those experiments designed for high pressures or to be performed in space.  Indium nitride is a candidate compound for high-speed laser and photo diodes for optical communication system, as well as for semiconductor lasers operating into the blue and ultraviolet regions.  But vapor-deposited InN exhibits large thermal decomposition at its optimum growth temperature.  In addition, epitaxy at lower than optimum temperatures and subatmospheric pressures incorporates indium droplets into the InN films.  However, surface stabilization data indicate that InN could be grown at much higher temperatures in high nitrogen pressures, with microgravity providing the necessary laminar flow conditions.  Numerical models for chemical vapor deposition have been developed, coupling complex chemical kinetics with fluid dynamic properties.

 

DSCP: A Secure and Extensible Distributed Computing Platform

Paul James Caritj, Nicholas Paul Johnson

Existing systems for distributed computing all have critical failings that prevent them from becoming practical computing tools; They allow for neither the secure execution of arbitrary third-party algorithms nor the monetary reimbursement of end-users for the use of their computing resources. DSCP has been designed to overcome these failings; it allows for safe execution of third party code across the network, while at the same time enabling providers of consumed resources to profit off of membership in said network, yielding economic incentive to join. Public key encryption is also employed to both secure and verify the sender of every message passed within the system.

 

Sun Tzu and e-Strategy of Intellectual Property Right (IPR)

Muchiu Chang

In this paper, we explore the philosophical foundation for the e-strategy of intellectual property right (IPR) based on “Sun Tzu: The Art of War”. First of all, we find that using modelling and simulation for evaluation and decision-making is a modern trend of implementing Sun Tzu's concept of “temple calculation”. Our patent-pending works in virtual validation and verification of product specifications by modelling simulation have strategic importance in securing a market. Second, Sun Tzu's defensive philosophy of “securing ourselves first” is preferable because IPR is a protracted combat. From the human-brain orientation of IPR, we propose to allow the individual member who creates the innovations to hold the IPRs of his innovations and share the profits that come from his IPRs, which is a corporation model of “I pay, we work, we win and we share”, so that there are incentives to encourage people to think and offer the solutions, and let the innovators free from the worry of being expendable. Finally, from our study of US patent database, we notice that IPR can bring new opportunities to individuals with know-how and skill, while INTERNET and world wide web (WWW) along with open source software provide a new platform for innovators in education (e-learning), creating innovation and manipulating marketing and strategy with low cost.

 

Application of Web-Based Electronic System to Diabetes Management

Jae-hyoung Cho, Hyuk-Sang Kwon, Hee-Seoung Kim, Kun-Ho Yoon

Considering the recent dramatic increase in the number of patients and the medical cost, development of cost-efficient treatment modality for diabetic patients is urgent need. So, we developed a web-based electronic glucose monitoring system using internet as one of e-medicine systems. With this system, we could show significant improvement of glycemic control by randomized controlled trial and most participants were satisfied with this system. Here we propose a framework to establish electronic medicine system for chronic disease management. This system could become much larger and more brisk with connection to mobile service system and with development of automatic data analysis system.

 

A Study on the Impact of Organizational Learning to the Effectiveness of Electronic Document Management Systems

Vincent Cho

Processing documents electronically can improve productivity, upgrade quality of product, avoid redundancy and improve the customer service, etc.  A popular system used in Hong Kong is Electronic Document Management system (EDMS), which is an electronic way to manage and organize the document more easily.  It is an advanced solution for companies to manage and organize tons of documents in the office. On the other hand, organizational learning is the development of new knowledge of insights that have the potential to influence behaviour.  It was a measurable organizational capability – one that could be developed over time, and one that could be directly towards the achievement of competitive advantage. 

 

Data Center Acceleration

Alan Crouch

New services and growing transaction volumes continue to accelerate data center networking requirements. Today’s multi-gigabit line rates suggest the messenger is plenty fast. The solution to handling these volumes must therefore lie in how we handle the message. Application consolidation, evolving workloads for Web services, and other volume demands point to the need for protocol acceleration or offload to efficiently convert network bandwidth into application performance. Intel research and development believes the solution is new system technologies that will help maximize CPU cycles for user applications while enabling the processing of packet payloads at multi-gigabit line rates.

 

 

 

 

 

Water Management in the Middle-East (GCC countries), Technological Perspective.

Anil Dani

Water is the scares resource in the Middle East. Creation of required water supply capabilities will be consuming over 10 billion US Dollars in GCC countries. This region is very active socio-politically for last several years. It is expected to remain so for the next decade. New water resources development technologies will play an important role in the life of a common person as well the local governments. The paper is an effort to address possible impact of water purification, waste water treatment and desalination technologies on environment, life style of a common citizen. This may give an insight about local needs and key success factors for new technological developments.

 

Combining Old Teaching Methods and New Technology to Create Happier Students.

Anne D’Arcy-Warmington

The tacit dimension of teaching and learning even with all the advances in technology still remains important today.  Emotions and environment whilst learning mathematics become memories that are foundations to mathematical comprehension.  New advances with online assistance and assessment serve to enhance teaching strategies not necessarily replace them. The creation of friendly face for both lecturer and computer means students can feel free to study further or may just leave with good vibes about mathematics hence reducing the mathematics negativity cycle.  The student may now see the mark of 5/10 as halfway to success rather than halfway to failure

 

Concept Visualizations of Computer Programs

Brian d'Auriol

A major issue facing the programming world today is the quick and efficient understanding of existing program code by programmers and software engineers.  Visualization of concepts inherent in the program code is proposed as a new mechanism to facilitate program comprehension. The premise of this research is that program comprehension is primarily based on the reader's conceptual formation of program code fragments. This paper identifies two novel visualization models called the Program-Scientific and the Conceptual Crown Visualization models; and presents preliminary visualization studies based on understanding programs from data processing, high performance computing and parallel computing applications.

 

 

 

 

 

Commonalities in the Re-acculturation Process to the University Environment for Adult Learners and Students with Diverse Backgrounds

Khaled Kevin Deeb, Adriana Cronin

This paper presents challenges and practical techniques that adult educators must deal and incorporate into their teaching and curriculum design in order to assist their students in the successful integration into the classroom environment. There is no such thing as the “typical student” in an adult education environment.  The unique background of each individual is as diverse as the south Florida landscape itself.  A variety of cultures, races, ethnic and religious backgrounds make up the population of this University. The Barry University community, for instance, has been ranked, “number one in campus diversity in the South region, according to the U.S. News and World Report 2004 America’s Best Colleges” (US News, 2003). This has been partially due to the diversified students’ backgrounds as well as Barry’s demographic landscape and multi-campus operational structure. The School of Adult and Continuing Education, in particular, offers degree programs to adult students at over 13 campuses throughout Florida. These adult learners vary in ethnicity, race, and academic background, among others. Studies show that minorities, especially females, are more likely to pursue their education. Also, classrooms are becoming another form of United Nations in which instructors should keep in mind the students’ cultural and educational differences as s/he prepares and delivers their lectures (Figs. 1..4). Thus, students should receive personal attention from their professors while building one-on-one relationships that help prepare them to succeed.

 

Inquiry-Based Learning by Students with Disabilities Using RemoteScope:  An Internet-Driven Digital Light Microscope

Bradley Duerstock, J. Paul Robinson

Physical access to classrooms and laboratories is important, but active participation of students with disabilities is paramount for learning. For a comprehensive educational experience, there needs to be interactions between students with disabilities and their teacher and classmates, as well as the course material and laboratory equipment. Inquiry-based learning is recommended as a standard of teaching science to all students at multiple grade levels. This pedagogical approach encourages students to actively explore and interact with scientific concepts and phenomena in order to gain a more thorough understanding. “Learning science is something that students do, not something that is done to them.” (National Research Council, 1996) However, physical disabilities require us to consider a significantly different approach because their disabilities prevent many students from taking a traditionally active part in classroom demonstrations and to perform laboratory experiments

 

Net-Conferencing as an e-Learning Tool to Improve Retention Rates on a Mathematics Course Taught by Distance Learning

J G Dyke, L D Jenkins 

Communicating mathematically by telephone or by correspondence tuition can be extremely difficult. In addition, attendance at face-to-face tutorials can be difficult for many students e.g. for those who are geographically isolated or for students with disabilities.  The net-conferencing project discussed in this paper was undertaken to investigate how new technologies, in particular a graphics pad used in conjunction with the Net-Meeting conferencing system, could be used to improve communication between tutor and student on a distance learning mathematics degree course and to investigate the hypothesis that this improved communication would lead to higher average marks and improved retention rates.

Growing the UK’s Healthcare Workforce through e-Learning

Maureen A. Eby

The Open University, the UK’s open and distance learning university, has invested in the developments of an e-learning environment to support work base learning initiatives to increase the UK’s healthcare workforce.  This initiative focussed on meeting the UK demand for nurses through the development of the first work based pre-registration programme.  This educational programme is drawing substantially on the developments within the Open University’s e-learning platform.  This paper will examine the development within e-learning that help to support this programme as well as focus on the educational pedagogy that supports robust and transparent learning which provides the foundations for lifelong learning.

 

A Cooperative Human-Robot Learning System using a Virtual Reality Telerobotic Interface

Yael Edan, Uri Kartoun, Helman Stern

This paper presents the concept of a cooperative human-robot learning system for remote robotic operations using a virtual reality (VR) interface. The case-study task is to empty the contents of an unknown bag for subsequent scrutiny. The system employs several state-action policies. A system state is defined as a condition that exists in the system for a significant period of time and consists of the following sub-states: 1) the bag which includes a feature set such as its type (e.g., plastic bag, briefcase, backpack, or suitcase) and its condition (e.g., open, close, orientation, distortions in bag contour, partial hiding of a bag, changing of handle lengths); 2) the robot (e.g., gripper spatial coordinates, home position, idle, performing a task); 3) other objects (e.g., contents that fell out of the bag, obstructions) and 4) environmental conditions such as illumination (e.g., day or night). A system action takes the system to a new state. Action examples include initial grasping point, lift and shake trajectory, re-arranging the position of a bag to prepare it for better grasping and enable the system to verify if all the bag contents have been extracted.

 

Network Adaptability in Clusters and Grids

Jeffrey J. Evans, Seongbok Baik, Joseph Kroculick, Cynthia S. Hood

The acceleration in computational scale to solve problems in emerging “computational” fields from Nanoscience and Genetics to Astrophysics places increasingly heavy compute and data storage burdens on locally and globally distributed computer systems. We are focusing on the management of these loosely coupled systems (clusters and Grids) which are asked to behave as an increasingly large single entity, repeatably and reliably. Our approach explores several areas and levels, from low level detection and reaction of subsystems to application dynamics, including human factors. These areas are discussed and results from our work to date is presented. New questions to stimulate deeper thought and discussion into requirements understanding are then posed.

 

 

 

 

A Collaborative Project for Developing Smart Residences for Aging Populations

Raymond A. Eve, Diane J. Cook, Sajal Das, Karthik Gopalratnam, Abhishek Roy, Susan Brown Eve, Kenneth Durand

This paper describes a collaborative project involving engineering and social science faculty from the University of Texas at Arlington and the University of North Texas working in collaboration with a retirement community.  The focus of the collaborative project is a prototype smart house, located at UTA. To assist the aging populations of post-industrial nations, the current project goes beyond existing efforts.  It does so by integrating a total system of human factors assessment through integrated data collection, remote monitoring, sophisticated prediction algorithms, and advanced data-mining to provide predictive health monitoring and daily living support for the aged and their caregivers.

 

The Internet's Role in Societal Awakening

Jay Fenello

As we transition from an Industrial Society, to one based on Knowledge and Information, many of our previous institutions will be found obsolete and irrelevant. Not only will institutions be impacted, but society as a whole.  This paper will focus on the individual's role in, and experience of, the process.

 

A Prolog-like Language for the Internet

Ulisses Ferreira