Why Develop Mobile Database Applications?
Mobile database applications are an effective way to streamline business processes and ensure that end users always have access to the critical corporate information they need to do their jobs. Although large enterprises tend to be the ones that invest most heavily in mobility, smaller businesses can also benefit from mobilizing their data.
“Mobile” is Not the Same as “Online”
Some people equate “mobile” to “online”, but they’re not the same thing. Online applications require a consistent and dependable network connection to an external server. Browser-based applications are the classic examples of online applications.
A truly mobile application, however, is an application that continues to work even when network connectivity is lost, unlike an online application. Being “disconnected” from the network does not stop the application dead in its tracks. This is an important feature for many users. Many mobile workers move in and out of network coverage on a regular basis while doing their jobs but need information to be “always available”. Online solutions don’t work well for these kinds of workers.
Local Data = Speed and Convenience
Mobile applications work best when they include some kind of local data store. By keeping important data local to the device, the user is insulated from network connectivity problems. Data operations are faster (no network lag) and can occur at any time. This results in a much better and less frustrating experience for the user.
Of course, using a local data store makes the design and implementation of the mobile application more complex. Even if the application works standalone, without the network, eventually some kind of data exchange must occur between the local data store and one or more external servers. Depending on the design of the application, keeping track of changes and dealing with potential conflicts can be quite challenging to manage. Mobile database applications often take longer and more skill to develop than their online-only equivalents because of this.
Saving on Network Costs
Besides offering a better user experience, mobile database applications can also yield significant savings in network costs. Data costs on mobile networks can be surprisingly high when using online applications, especially browser-based applications. The continuous back-and-forth between the device and the servers hosting the application racks up network charges quite quickly. A well-designed mobile application, on the other hand, requires only minimal use of the network by exchanging changes to data instead of entire data sets.
While the upfront costs of developing mobile database applications are typically higher than online applications, the savings on network costs can be quite substantial and make these applications must more cost-effective than their online equivalents. It’s certainly something to consider the next time you develop or purchase a mobile application.
Rapid Application Development Model (RAD)
RAD is a linear sequential software development process model that emphasis an extremely short development cycle using a component based construction approach. If the requirements are well understood and defines, and the project scope is constraint, the RAD process enables a development team to create a fully functional system with in very short time period.
RAD model has the following phases:
Business Modeling: The information flow among business functions is defined by answering questions like what information drives the business process, what information is generated, who generates it, where does the information go, who process it and so on. Data Modeling: The information collected from business modeling is refined into a set of data objects (entities) that are needed to support the business. The attributes (character of each entity) are identified and the relation between these data objects (entities) is defined. Process Modeling: The data object defined in the data modeling phase are transformed to achieve the information flow necessary to implement a business function. Processing descriptions are created for adding, modifying, deleting or retrieving a data object. Application Generation: Automated tools are used to facilitate construction of the software; even they use the 4th GL techniques. Testing and Turn over: Many of the programming components have already been tested since RAD emphasis reuse. This reduces overall testing time. But new components must be tested and all interfaces must be fully exercised.
What are the advantages and disadvantages of RAD?
RAD reduces the development time and reusability of components help to speed up development. All functions are modularized so it is easy to work with.
For large projects RAD require highly skilled engineers in the team. Both end customer and developer should be committed to complete the system in a much abbreviated time frame. If commitment is lacking RAD will fail. RAD is based on Object Oriented approach and if it is difficult to modularize the project the RAD may not work well.
How to Fix Acrord32 Exe Application Error?
For people running a Windows XP system it is not very uncommon to experience an acrord32.exe application error. While it may seem like a simple annoyance, but this sort of problem can be an indication for larger trouble in the future. This is usually a symptom for larger underlying problem and needs to be taken care of as soon as possible. When facing such an error people usually choose the simplest solution of restarting the PC but, if the problem remains unsolved for a long time you can be sure that you will be facing even bigger problems in the near future. Though this sort of error may seem very small and insignificant, an error is an error and should not be neglected in any way.
Hardware related issues – many systems usually show such acrord32.exe application errors during startup due to hardware related problems which are often caused by malfunctioning hardware, invalid device drivers and even invalid CMOS entries. Most of them can be very easily taken care of by following some simple steps.
A total check of all hardware devices should be performed in order to make sure that none of your devices are malfunctioning. If it is suspected that any of your devices is actually malfunctioning then you must always check by starting your system after removing the suspected faulty device. Device driver related issues can also be resolved very simply, by updating the device drivers to their latest version. Most manufacturers offer free upgrades for their device drivers which can be downloaded easily off their websites. One must always make sure to have the latest drivers at all time in order to ensure that their system keeps running smoothly. Invalid CMOS entries can also be taken care of by entering your CMOS menu and resetting all the settings back to their default entries.
Software related issues – often be sort of errors can also be caused by defective startups for many software but mostly Acrobat reader. This sort of defect can easily be caused by an improper installation of the software package and it can also be corrected very simply by either removing the software altogether or reinstalling it properly.
Registry related issues – acrord32.exe application error can also be caused by invalid registry entries that indicate improper startup paths for the acrobat reader program that were installed incorrectly. Defective registry entries can also exist due to effects of any virus or spyware. Often many driver mismatches can also create defective registry entries causing the system to freeze during the startup.
This type of problem can easily be corrected by using a registry cleaner to remove the invalid or improper entries and in order to keep your system running smoothly and perfectly.