Software engineering

1. Software engineering
Presented by: Nourhan Tarek
PHD candidate at Ain Shams University
Masters of science in Electrical engineering at
Ain Shams University

2. 1- UML State Machine Diagrams and Modeling
State Machine Diagram
Illustrates the interesting events and states of an object and the behavior of an object
in reaction to an event.
Event: significant or noteworthy occurrence.
• E.g., telephone receiver taken off hook.
State: the condition of an object at a moment in time (between events).
Transition: a relationship between two states; when an event occurs, the object
moves from the current state to a related state.

3. 1- UML State Machine Diagrams and Modeling
Transition Actions and Guards
A transition can cause an action to fire.
In software implementation, a method of the class of the state machine is
invoked.
A transition may have a conditional guard.
The transition occurs only if the test passes.

4. 1- UML State Machine Diagrams and Modeling
Nested States
A state may be represented as nested substates.
In UML, substates are shown by nesting them in a superstate box.
A substate inherits the transitions of its superstate.

5. Presented by: Nourhan Tarek
PHD candidate at Ain Shams University
Masters of science in Electrical engineering at
Ain Shams University
Computer architecture

6. 2- Pipelining
It is a technique of decomposing a sequential process into sub-operations.
Each sub-operation is executed in a special dedicated segment that operates
concurrently with other segments
The overlapping of computations is possible by associating a register with segments
in the pipeline
The registers provide isolation between each segment, so that each segment can
operate on distinct data simultaneously

7. 2- Pipelining
𝐴𝑖 ∗ 𝐵𝑖 + 𝐶𝑖, 𝑖 = 1,2, … , 7
Sub-operations are:
The behavior of the pipeline can be
illustrated by a space-time diagram

8. 2- Pipelining

9. Thank you