Overview

This architecture is very simple and should be implemented in each city or a country or a region having about 1 million people. Food and water are the main resources in the life cycle of a person and is very important that it is of good quality before intake of both food and water. Hence monitoring the quality by different measures is of importance by conducting a survey or by electronic means, i.e. according to the e-service architecture definition.

This e-service architecture defines two different electronic measurement techniques that most of the enterprises perform viz: Online residual chlorine monitor that determine PPM of chlorine and classify water quality according to it and another is the Electronic nose technology for defining the food quality that classifies food quality according to odor, flavor etc. These measured content are electronically stored in different tables so that they can be retrieved by any agency to act on these measured values. These values are also generally used as a point of survey and compare these results obtained in different areas.

Different enterprises retrieve the e-content by directly querying the database and is distributed to different agencies. Such a typical agency works on the content from various enterprises that do quality measurement like purity of drinking water and food quality of different types of food stuffs available abundantly in that area. In a city like Philadelphia, the agency then maintains a database of itself that holds the values combined from both the public safety services and is retrieved using a front-end button that acts as the interface between the user and the network.


Figure: Food quality and water purity e-service architecture

The Key Components

The key components of this e-service architecture are:

1. Electronic nose technology sensors-
The electronic nose was developed in order to mimic human olfaction that functions as a non-separative mechanism: i.e. an odor / flavor is perceived as a global fingerprint. Essentially the instrument consists of head space sampling, sensor array, and pattern recognition modules, to generate signal pattern that are used for characterizing odors. Electronic noses include three major parts: a sample delivery system, a detection system, a computing system.
  • Sample delivery system- Enables the generation of the headspace of a sample, which is the fraction analyzed.
  • Detection system- Consists of sensors. When in contact with volatile compounds, the sensors react, and they experience a change of electrical properties.
  • Computing system- Combine the responses of all of the sensors, which represents the input for the data treatment.
2. Online residual Chlorine monitor-
Measures free or total chlorine depending upon the reagent. User selectable features and innovative design sets the new CLX Online Residual Chlorine Monitor apart from the competition. Adjustable cycle times, settable alarms, easy reagent replacement and unattended operation equates to an instrument that is easy to use and versatile. This mainly used PPM in terms of chlorine measurement that classifies water purity level.
3. Different enterprises (uses different techniques or measure different items)-
There are many enterprises that perform the operation of measuring and storing of e-content like PPM values of drinking water in different areas of a city , like the food quality measures of different types of food (Milk products, Groceries Breads etc).
4. Food quality and drinking water purity e-service agency and online portal-
The agency is the service provider for the user requiring the desired e-service for the public safety. A user simply enters the area zip code to find out the drinking water purity level and also can select any given enterprise in the locality that gives the food nourishment quality that mainly depends upon the weather zone the city lies in.

5. Logical Model
This logical architecture shows the various ways information is measured, retrieved and even added and distributed among different enterprises. The e-content are also used by other e-services in the public safety sector as these services are somehow related to other e-services defined in the sector. The performance or the reasons for quality depends upon other e-services like the weather forecast which may change the quality measurement values of different food stuffs present currently.


Figure: Logical architecture of E-service management system