Activity Diagrams describe the flow of action and internal processing. The activity diagrams are ... more Activity Diagrams describe the flow of action and internal processing. The activity diagrams are used to stable the gap between use-case diagrams and class diagrams. In this paper, we propose a conditioned slicing algorithm of activity diagram. First, we propose an intermediate representation called conditioned slicing of activity dependence graph (CSADG) to represent the UML activity diagram. The construction of CSADG is based on the precondition rule of activity diagram for conditioned slicing. Then, we propose an algorithm for conditioned slicing of activity diagram using intermediate representation, which is useful in smooth business processes and improving the efficiency of software.
This paper presents a review of the pulse tube refrigerator from its inception in the mid-1960s u... more This paper presents a review of the pulse tube refrigerator from its inception in the mid-1960s up to the present. Except brief description about the Pulse Tube Refrigerator, emphasis is given on two subjects. First is second law based analysis of fluid flow in the regenerator of a PTR & secondly on recent development as an efficient & reliable cryocooler. As a necessary component, regenerator plays an important role in the refrigeration performance of the pulse tube refrigerator. The objective of this research is to investigate the flow characteristics in a porous regenerator of the pulse tube refrigerators, subjected to oscillating flow. The hydrodynamic and thermal behavior of the regenerator is investigated by considering porous media approach. The conservation equations are transformed by implementing the volumetric average scheme. Harmonic approximation technique is employed to derive an analytical solution. To investigate the system performance, second law analysis is performed in order to calculate the second law efficiency. The effect of geometry and operating key parameters on the regenerator performance are investigated as well. The developed model is able to predict the oscillating flow characteristics in the regenerator.
This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Propo... more This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Proposed cryptosystem has been implemented in C. State transitions of programmable cellular automata (PCA) are the basis to define certain fundamental transformations to encrypt and decrypt in the cryptographic system. Different rule configurations are used to form group cellular automata that would be used in encryption and decryption.
This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Propo... more This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Proposed cryptosystem has been implemented in C. State transitions of programmable cellular automata (PCA) are the basis to define certain fundamental transformations to encrypt and decrypt in the cryptographic system. Different rule configurations are used to form group cellular automata that would be used in encryption and decryption.
This paper investigates a finite state machine based combination (Digital) lock using several mod... more This paper investigates a finite state machine based combination (Digital) lock using several modules, both combinational and sequential circuitry, using Verilog coding and simulated in Xilinx ISE 14.2.
Activity Diagrams describe the flow of action and internal processing. The activity diagrams are ... more Activity Diagrams describe the flow of action and internal processing. The activity diagrams are used to stable the gap between use-case diagrams and class diagrams. In this paper, we propose a conditioned slicing algorithm of activity diagram. First, we propose an intermediate representation called conditioned slicing of activity dependence graph (CSADG) to represent the UML activity diagram. The construction of CSADG is based on the precondition rule of activity diagram for conditioned slicing. Then, we propose an algorithm for conditioned slicing of activity diagram using intermediate representation, which is useful in smooth business processes and improving the efficiency of software.
This paper presents a review of the pulse tube refrigerator from its inception in the mid-1960s u... more This paper presents a review of the pulse tube refrigerator from its inception in the mid-1960s up to the present. Except brief description about the Pulse Tube Refrigerator, emphasis is given on two subjects. First is second law based analysis of fluid flow in the regenerator of a PTR & secondly on recent development as an efficient & reliable cryocooler. As a necessary component, regenerator plays an important role in the refrigeration performance of the pulse tube refrigerator. The objective of this research is to investigate the flow characteristics in a porous regenerator of the pulse tube refrigerators, subjected to oscillating flow. The hydrodynamic and thermal behavior of the regenerator is investigated by considering porous media approach. The conservation equations are transformed by implementing the volumetric average scheme. Harmonic approximation technique is employed to derive an analytical solution. To investigate the system performance, second law analysis is performed in order to calculate the second law efficiency. The effect of geometry and operating key parameters on the regenerator performance are investigated as well. The developed model is able to predict the oscillating flow characteristics in the regenerator.
This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Propo... more This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Proposed cryptosystem has been implemented in C. State transitions of programmable cellular automata (PCA) are the basis to define certain fundamental transformations to encrypt and decrypt in the cryptographic system. Different rule configurations are used to form group cellular automata that would be used in encryption and decryption.
This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Propo... more This paper presents a symmetric key cryptography technique that uses cellular automata(CA). Proposed cryptosystem has been implemented in C. State transitions of programmable cellular automata (PCA) are the basis to define certain fundamental transformations to encrypt and decrypt in the cryptographic system. Different rule configurations are used to form group cellular automata that would be used in encryption and decryption.
This paper investigates a finite state machine based combination (Digital) lock using several mod... more This paper investigates a finite state machine based combination (Digital) lock using several modules, both combinational and sequential circuitry, using Verilog coding and simulated in Xilinx ISE 14.2.
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