Getting Started With Palm Query Application Development

Introduction

A Palm Query Application, or PQA as they are commonly called, is a special type of application for Palm VII devices that allows a user to interact wirelessly with Web content. A PQA takes the concept of interactive Web browsing a step farther by consolidating related, static content into an application that can be installed on a Palm VII device. Links within a PQA document can either refer to other pages within the application or they can refer to documents or scripts residing on a publicly available Web server. The pages retrieved from within that application result in no wireless data transmission. Pages not in the PQA, naturally, result in a wireless HTTP request. Before diving into the specifics of Palm Query Application development (it's painless...honest!), let's first spend a moment explaining what the Palm VII is and what its capabilities are.

The Palm VII Organizer

The Palm VII Connected Organizer is the first mass-marketed and mass-produced electronic organizer with wireless capabilities. The engineering design behind the product is worthy of a separate article in itself, but we won't bore you with the details here. Suffice it to say that Palm was able to design a handheld device that is nearly the same size and weight of a Palm III with the same memory, display, and operating system plus a wireless modem and antenna...all with no noticeable performance or power degradation! Just as impressive is the way that the device operates using the Palm.net service (based on the BellSouth Wireless Data network). The process to setup an account on the network and begin retrieving PQA data (known as Web Clippings) is very streamlined. Simply lift the antenna for the first time, enter in user information and a credit card, select the service you want (designed to accomodate light users all the way up to "power" users), and you're ready to roll! The Palm VII comes pre-installed with a number of useful PQA's including those from Amazon.com, Yahoo!, MapQuest, and The Weather Channel. All are impressive in their own right and provide real-world examples of the power of wireless information access. For instance, the Amazon.com PQA ties your wireless access to your "One-Click" account information set up on their standard Web site. Doing this eliminates the need to reenter address and credit card information and allows the user to simply click and buy wirelessly. Very cool (and dangerous for the impulse buyer!).

What is WLAN?

What is WLAN?

WLAN - stands for Wireless Local Area Network. WLAN is a flexible data communication system implemented as an extension to, or as an alternative for, a wired LAN within a building. WLAN technology is being widely used to provide wireless internet access in public places like airports, hotels, and shopping centres but it is also increasingly being used in the home and office to allow computers to access the internet and network with each other without the need for special cables.

WLANs use radio waves in the 2.4 and 5 GHz range to transmit and receive data over the air.

What research has been undertaken?

The use of radio waves has been the subject of scientific research spanning more than 50 years. In that time, a wide variety of frequencies as well as modulations have been studied to determine whether there is any impact on our health. This large and growing body of research has been constantly reviewed by numerous independent scientific expert panels, government agencies, standard-setting organizations and health authorities from around the world. All have reached the same general scientific conclusion: that there is no established evidence of any adverse health effects from exposure to radio waves within the limits applied to mobile communications systems.

Are there safety limits for exposure to radio waves?

Yes there are. It is worth remembering that the use of radio waves is a common part of our everyday lives and bring us the benefits and enjoyment of television, radio and mobile phones. From the research that has been undertaken, safety limits have been established to provide protection for all members of our society - from the young to the very old.

These standards, endorsed by the World Health Organization (WHO) and other authorities around the world, establish exposure limits based on extensive reviews of all available scientific evidence and include substantial margins of safety to protect both users and the public. Member companies of the Mobile Manufacturers Forum test their products to assure their adherence to these rigorous safety standards.

What is TETRA?

What is TETRA?

TETRA stands for TErrestrial Trunked RAdio. TETRA is an open digital two-way radio standard that defines a particular way to encode radio signals for enhanced communications for professional users such as emergency services, public utilities and transportation organizations. TETRA combines features of two-way radios, mobile telephony, messaging and data. TETRA shares many characteristics with other mobile communications networks such as GSM, D-AMPS and IDEN.

TETRA uses Time Division Multiple Access (TDMA) technology and operates in the upper 300MHz range for emergency services, as well as within the 400 and 900 MHz range for civialian use.

What research has been undertaken?

The use of radio waves has been the subject of scientific research spanning more than 50 years. In that time, a wide variety of frequencies as well as modulations have been studied to determine whether there is any impact on our health. This large and growing body of research has been constantly reviewed by numerous independent scientific expert panels, government agencies, standard-setting organizations and health authorities from around the world. All have reached the same general scientific conclusion: that there is no established evidence of any adverse health effects from exposure to radio waves within the limits applied to mobile communications systems.

Are there safety limits for exposure to radio waves?

Yes there are. It is worth remembering that the use of radio waves is a common part of our everyday lives and bring us the benefits and enjoyment of television, radio and mobile phones. From the research that has been undertaken, safety limits have been established to provide protection for all members of our society - from the young to the very old.

These standards, endorsed by the World Health Organization (WHO) and other authorities around the world, establish exposure limits based on extensive reviews of all available scientific evidence and include substantial margins of safety to protect both users and the public. Member companies of the Mobile Manufacturers Forum test their products to assure their adherence to these rigorous safety standards.

What is DECT

What is DECT?

DECT stands for Digital Enhanced Cordless Telecommunication. DECT is a common standard for cordless personal telephones and is a radio technology suited for voice, data and networking applications in residential, corporate and public environments.

DECT operates in the radio frequency range of 1880 - 1950 MHz.

What research has been undertaken?

The use of radio waves has been the subject of scientific research spanning more than 50 years. In that time, a wide variety of frequencies as well as modulations have been studied to determine whether there is any impact on our health. This large and growing body of research has been constantly reviewed by numerous independent scientific expert panels, government agencies, standard-setting organizations and health authorities from around the world. All have reached the same general scientific conclusion: that there is no established evidence of any adverse health effects from exposure to radio waves within the limits applied to mobile communications systems.

 

Are there safety limits for exposure to radio waves?

Yes there are. It is worth remembering that the use of radio waves is a common part of our everyday lives and bring us the benefits and enjoyment of television, radio and mobile phones. From the research that has been undertaken, safety limits have been established to provide protection for all members of our society - from the young to the very old.

These standards, endorsed by the World Health Organization (WHO) and other authorities around the world, establish exposure limits based on extensive reviews of all available scientific evidence and include substantial margins of safety to protect both users and the public. Member companies of the Mobile Manufacturers Forum test their products to assure their adherence to these rigorous safety standards.

Bluetooth

What is Bluetooth?

Bluetooth wireless technology is a short-range radio technology that uses radio frequency fields to transmit signals over short distances between telephones, computers and other devices. The technology offers simplified communication and synchronization between devices without the need for cables.

Bluetooth operates in the 2.4 GHz radio spectrum and in communicating with other devices, the signal is constantly adjusted amongst 79 frequencies which minimizes any interference from other radio frequency emitting devices.

What research has been undertaken?

The use of radio waves has been the subject of scientific research spanning more than 50 years. In that time, a wide variety of frequencies as well as modulations have been studied to determine whether there is any impact on our health. This large and growing body of research has been constantly reviewed by numerous independent scientific expert panels, government agencies, standard-setting organizations and health authorities from around the world. All have reached the same general scientific conclusion: that there is no established evidence of any adverse health effects from exposure to radio waves within the limits applied to mobile communications systems.

Are there safety limits for exposure to radio waves?

Yes there are. It is worth remembering that the use of radio waves is a common part of our everyday lives and bring us the benefits and enjoyment of television, radio and mobile phones. From the research that has been undertaken, safety limits have been established to provide protection for all members of our society - from the young to the very old.

These standards, endorsed by the World Health Organization (WHO) and other authorities around the world, establish exposure limits based on extensive reviews of all available scientific evidence and include substantial margins of safety to protect both users and the public. Member companies of the Mobile Manufacturers Forum test their products to assure their adherence to these rigorous safety standards.

Health and Safety Fact Sheet 3G

What is 3G?

3G stands for third generation, and is a collection of international standards and technologies aimed at increasing efficiency and improving the performance of mobile wireless networks. 3G wireless services offer enhancements such as greater data speeds, increased capacity for voice and data and the advent of packet data networks versus today s switched networks.

3G is a generic term covering a range of wireless network technologies, including WCDMA (Wideband Code Division Multiple Access), CDMA2000 (Code Division Multiple Access 2000), UMTS (Universal Mobile Telecommunications System) and EDGE (Enhanced Data for Global Evolution). 3G combines high-speed mobile access with Internet Protocol (IP) based services.

What research has been undertaken?

The use of radio waves has been the subject of scientific research spanning more than 50 years. In that time, a wide variety of frequencies as well as modulations have been studied to determine whether there is any impact on our health. This large and growing body of research has been constantly reviewed by numerous independent scientific expert panels, government agencies, standard-setting organizations and health authorities from around the world. All have reached the same general scientific conclusion: that there is no established evidence of any adverse health effects from exposure to radio waves within the limits applied to mobile communications systems.

Are there safety limits for exposure to radio waves?

Yes there are. It is worth remembering that the use of radio waves is a common part of our everyday lives and bring us the benefits and enjoyment of television, radio and mobile phones. From the research that has been undertaken, safety limits have been established to provide protection for all members of our society - from the young to the very old.

These standards, endorsed by the World Health Organization (WHO) and other authorities around the world, establish exposure limits based on extensive reviews of all available scientific evidence and include substantial margins of safety to protect both users and the public. Member companies of the Mobile Manufacturers Forum test their products to assure their adherence to these rigorous safety standards.