Zhixin Wei

It’s important to choose the level of risk tolerance your organization is comfortable with when using services that rely upon a multi-tenancy model.

Also, you need to define the requirements align with your cloud application vendors.

Yes, it’s important to verify that the cloud service provider complies with data security industry standards.

I would use Amazon Simple Storage Service. Amongst the AWS suite of cloud-based compute, network and storage solutions is their ‘Simple Storage System’ or ‘S3’. S3 is an object based storage solution and can be thought of as an easily accessed, easily managed and infinitely expandable data warehouse.
There are some ways to secure cloud applica…[Read more]

Computer Aids for the Blind – The University at Buffalo”s Assistive Technology Training Online Project provides this list of keyboard and mouse alternatives for its blind population.

Enter a webpage into this simulat or to see what it looks like to those who are colorblind. These simulators can also help those designing accessible websites.

Special needs children can also benefit from computer-based learning.

I also think all team members should be in charge of designing the database. It is a complex processing.

At the board-room level, data encryption may easily be viewed as a binary matter: data encryption is employed and the company’s assets are secure, or they’re not encrypted and it’s time to panic.

And the first step is to get a high-level grasp of the topic and an understanding of the business or functional area. Generally this is referred to as the business domain.

In UML terms, subject is a classifier playing the “subject” role. They did not create a separate special class for subject, as it was done with actor and use case. UML 2.5 states that a subject of a UseCase could be a system or any other element that may have behavior, such as a Component or Class

Use case diagrams are used to specify:
(external) requirements, required usages of a system under design or analysis (subject) – to capture what the system is supposed to do; the functionality offered by a subject – what the system can do

The objective of the SSD is to document the actual input data and the output data that flows between the user actor and the system.

There are many well-formedness rules of each UML element in UML specification, but there are not any rules that check the consistency among UML diagrams.The cross checking between models ensure that the requirements are accurate and correct. we propose several checking rules to improve the consistency among UML diagrams, especially between UML…[Read more]

The process described can be anything: a manufacturing process, an administrative or service process, a project plan. This is a generic tool that can be adapted for a wide variety of purposes.

Review the flowchart with others involved in the process (workers, supervisors, suppliers, customers) to see if they agree that the process is drawn accurately.

An initial diagram is a general overview of what the stakeholders think the business process looks like. This is the general diagram that you will be “fleshing out” throughout the diagramming process. Before crafting this diagram, sit down with stakeholders to come up with initial, high-level steps in the business process.

Both of data flow diagram and use case diagram are used to view the system from different angles. A data flow diagram is a graphic representation of the flow of information or data in a system or portion of system. It consists of data flows, processes, sources, destinations, and stores.

A DFD only shows the sources and destinations of data…[Read more]

Also, I think the most important things is to identify the relationships between different entities.

Data modeling is an essential step in the process of creating any complex software. It helps developers understand the domain and organize their work accordingly.