Mind Maps

Mind maps is a taking note and technique of creative thinking. It helps you to take your notes more creative way, to remember them easier and to understand them more obvious.

This technique is the most suitable method for perception and storage style of brain. Mind maps create a visual picture of informations that save in your brain. With this method your brain hold informations in memory more easier, furthermore it helps you to extract at paper easily. This technique is completely different other working techniques, it enables creative thinking and to be earned time to person. Tony Buzan is the initiator of this technique. Many people pointed out that they have succeeded many subjects like studying lesson, solving problem, writing summary, planning, speaking etc.

You can use colors, shapes, diagrams, pictures, symbols with this technique. Especially using colors is important to release imagination.

There are many advantage of mind maps unlike method of taking traditional linear note.

* To spend less time; note only main words called “key word” and reading

* To appear creative thinking

* To grow remembering power

* To concentrate essential subjects

Mind maps is not static or restrictive. Afterwards it can be made addition or correcting.

Here is How to Make a Mind Map

There is a lot of computer programs and web sites for making a mind map.

Novamind

imindmap , my favorite mind mapping program

Mindmeister , my favorite online mind mapping site

My example that I have made by using mindmeister

 

Oracle Shared Server

In course of time number of application users may increase. And capacity of Oracle servers may be insufficient. At this situation you have to buy additional hardware resources. To buy additional resources means that spend extra money and time. But Oracle Shared Server come to help and it can be stopped your headaches.

You know Oracle database service users via creating server process. As default one server process service only one user process (dedicated server process), one-to-one relationship. But shared server process can service multiple user process, one-to-many relationship. It is a quite useful method for minimizing usage of hardware resources.

Although shared server process is useful method, it cannot be applied to every application type. Which application type is suitable? Applications that have small transactions and that returning small result set are good. Because of number of server processes is limited, dealing bigger result sets reduce response time.

In dedicated server environment an user request assigns to one server process directly. However in shared server environment an request is treated by a dispatcher process.  A dispatcher process is responsible for servicing user requests. It has ability for servicing many ones.

Dispatchers put the requests that coming from user into request queue. The requests prepared by shared server process put into response queue and these are returned the user by dispatcher. Although all dispatchers use same request queue each dispatchers have own response queue.

When being switched dedicated server to shared server , some changes occur in memory structure. The some session informations are holded in PGA are began to be held in SGA. This area is called User Global Area(UGA).

Finally note that Oracle Shared Server is a scalability enhancement option, not a performance enhancement option. This is summary of above explanations.

 

Broken Windows Theory

The theory propounded by James Q. Wilson and George L. Kelling in the beginning of 1980s. It explains with the following example in Wikipedia.

Consider a building with a few broken windows. If the windows are not repaired, the tendency is for vandals to break a few more windows. Eventually, they may even break into the building, and if it’s unoccupied, perhaps become squatters or light fires inside.

Or consider a sidewalk. Some litter accumulates. Soon, more litter accumulates. Eventually, people even start leaving bags of trash from take-out restaurants there or breaking into cars.

By being based on this theory, the authorities that predict much bigger problems can be solved by giving priority to the smallest problems and violations of rule in some big cities as New York provided crime ratioes reduced about zero level within next 20 years.

Broken windows theory can also constitute solution for many big problems at your business life. In your own business or in the company you work, to solve the problems seem unimportant fastly prevents to be repeated failure like them and become bigger problems supported by those small problems.

http://en.wikipedia.org/wiki/Broken_windows

 

 

I love PL/SQL

Writing business logic by using PL/SQL is a good opinion to keep in database all things and in terms of security.

On the other hand, do you think that things you can do with PL/SQL is limited with this.

The following web site you maybe give hints about what sort to do much more.

www.plpdf.com

I love PL/SQL…

 

Collections in PL/SQL – Part Two

2. Nested Table

Nested Table is an another collection type. The difference from associative array I mentioned earlier is that need to initialize before using it. Besides nested tables can use as table columns.

CREATE [ OR REPLACE ] TYPE type_name AS | IS TABLE OF element_datatype [ NOT NULL ];

Example;

 

Collections in PL/SQL – Part One

How do you use arrays in PL/SQL?

In other programming language like Java and C# you simply define as following line:
int[] iArray = new int[5];

But in PL/SQL it’s not as easy as that. Why? Because there are three types of collections and we ought to know which collection type must use. Collections are expecially very useful for caching data of lookup tables. If data is cached then amount of context-switching will be less.