This document presents a model for a local area network (LAN) based application for inter-office communication. The authors designed a messenger software to be installed on an organization's LAN to allow staff to communicate and share information efficiently. The software was developed using Java and analyzed using various UML diagrams. It uses a client-server model with the control part installed on the server and messenger part on clients. The software allows users to send short messages, memos, letters and access an electronic bulletin board. It was tested on a campus LAN network and achieved the objectives of enabling free communication between staff during office hours through a centralized and secure system.
SOFTWARE DESIGN ANALYSIS WITH DYNAMIC SYSTEM RUN-TIME ARCHITECTURE DECOMPOSITIONijseajournal
Software re-engineering involves the studying of targeting system’s design and architecture. However,
enterprise legacy software systems tend to be large and complex, making the analysis of system design
architecture a difficult task. To solve this problem, the study proposes an approach that dynamically
decomposes software architecture using the run-time system information to reduce the complexity
associated with analyzing large scale architecture artifacts. The study demonstrates that dynamic
architecture decomposition is an efficient way to limit the complexity and risk associated with reengineering
activities of a large legacy system. This new approach divides the system into a collection of
meaningful modular parts with low coupling, high cohesion, and a minimal interface. This division
facilitates the design analysis and incremental software re-engineering process. This paper details two
major techniques to decompose legacy system architecture. The approach is also supported by automated
reverse engineering tools that were developed during the course of the study. The preliminary results
indicate that this novel approach is very promising.
Use Case Modeling in Software Development: A Survey and TaxonomyEswar Publications
Identifying use cases is one of the most important steps in the software requirement analysis. This paper makes a literature review over use cases and then presents six taxonomies for them. The first taxonomy is based on the level of functionality of a system in a domain. The second taxonomy is based on primacy of functionality and the third one relies on essentialness of functionality of the system. The fourth taxonomy is concerned with supporting of functionality. The fifth taxonomy is based on the boundary of functionality and the sixth one is related to generalization/specialization relation. Then the use cases are evaluated in a case study in a control command police system. Several guidelines are recommended for developing use cases and their refinement, based on some
practical experience obtained from the evaluation.
Application Of UML In Real-Time Embedded Systemsijseajournal
The UML was designed as a graphical notation for use with object-oriented systems and applications.
Because of its popularity, now it is emerging in the field of embedded systems design as a modeling
language. The UML notation is useful in capturing the requirements, documenting the structure,
decomposing into objects and defining relationships between objects. It is a notational language that is
very useful in modelling the real-time embedded systems. This paper presents the requirements and
analysis modelling of a real-time embedded system related to a control system application for platform
stabilization using COMET method of design with UML notation. These applications involve designing of
electromechanical systems that are controlled by multi-processors.
EMPIRICAL APPLICATION OF SIMULATED ANNEALING USING OBJECT-ORIENTED METRICS TO...ijcsa
The work is about using Simulated Annealing Algorithm for the effort estimation model parameter
optimization which can lead to the reduction in the difference in actual and estimated effort used in model
development.
The model has been tested using OOP’s dataset, obtained from NASA for research purpose.The data set
based model equation parameters have been found that consists of two independent variables, viz. Lines of
Code (LOC) along with one more attribute as a dependent variable related to software development effort
(DE). The results have been compared with the earlier work done by the author on Artificial Neural
Network (ANN) and Adaptive Neuro Fuzzy Inference System (ANFIS) and it has been observed that the
developed SA based model is more capable to provide better estimation of software development effort than
ANN and ANFIS
SE_Lec 05_System Modelling and Context ModelAmr E. Mohamed
System modeling is the process of developing abstract models of a system using graphical notations like the Unified Modeling Language (UML) to represent different views of a system. Models help analysts understand system functionality and communicate with customers. Models of existing and new systems are used during requirements engineering to clarify current systems, discuss strengths/weaknesses, and explain proposed requirements.
The document describes an algorithm for tolerating crash failures in distributed systems called the algorithm of mutual suspicion (AMS). AMS allows the backbone of a distributed application to tolerate failures of up to n-1 of its n components. Each node runs one agent of the backbone consisting of 3 tasks: D for the system database, I for monitoring "I'm alive" signals, and R for error recovery. The coordinator periodically sends "I'm alive" messages and assistants reply with acknowledgments. If a node does not receive the expected messages, it enters a suspicion period and may deduce a crashed component and initiate recovery actions.
This document provides an overview of system modeling. It discusses that system modeling involves developing abstract models of a system from different perspectives, and is commonly done using the Unified Modeling Language (UML). It also describes various UML diagram types used in system modeling like use case diagrams, class diagrams, and state diagrams. Finally, it gives examples of modeling different views of a mental health case management system, including contextual models, interaction models, structural models, and behavioral models.
SIMPLIFIED CBA CONCEPT AND EXPRESS CHOICE METHOD FOR INTEGRATED NETWORK MANAG...IJCNCJournal
This document proposes a simplified method for evaluating and selecting a network management system (NMS) for integration into an existing computer network. The method evaluates NMS options based on 3 criteria: 1) the level of integration risk, 2) the expected increase in network maintenance effectiveness, and 3) the level of management tasks completed by the system. Each criterion is evaluated on a standardized scale of 0 to 2. The scores are combined to calculate an overall value for each NMS, with the highest scoring option selected for integration. The method aims to provide a rapid evaluation that does not require extensive expertise, resources or time.
SOFTWARE DESIGN ANALYSIS WITH DYNAMIC SYSTEM RUN-TIME ARCHITECTURE DECOMPOSITIONijseajournal
Software re-engineering involves the studying of targeting system’s design and architecture. However,
enterprise legacy software systems tend to be large and complex, making the analysis of system design
architecture a difficult task. To solve this problem, the study proposes an approach that dynamically
decomposes software architecture using the run-time system information to reduce the complexity
associated with analyzing large scale architecture artifacts. The study demonstrates that dynamic
architecture decomposition is an efficient way to limit the complexity and risk associated with reengineering
activities of a large legacy system. This new approach divides the system into a collection of
meaningful modular parts with low coupling, high cohesion, and a minimal interface. This division
facilitates the design analysis and incremental software re-engineering process. This paper details two
major techniques to decompose legacy system architecture. The approach is also supported by automated
reverse engineering tools that were developed during the course of the study. The preliminary results
indicate that this novel approach is very promising.
Use Case Modeling in Software Development: A Survey and TaxonomyEswar Publications
Identifying use cases is one of the most important steps in the software requirement analysis. This paper makes a literature review over use cases and then presents six taxonomies for them. The first taxonomy is based on the level of functionality of a system in a domain. The second taxonomy is based on primacy of functionality and the third one relies on essentialness of functionality of the system. The fourth taxonomy is concerned with supporting of functionality. The fifth taxonomy is based on the boundary of functionality and the sixth one is related to generalization/specialization relation. Then the use cases are evaluated in a case study in a control command police system. Several guidelines are recommended for developing use cases and their refinement, based on some
practical experience obtained from the evaluation.
Application Of UML In Real-Time Embedded Systemsijseajournal
The UML was designed as a graphical notation for use with object-oriented systems and applications.
Because of its popularity, now it is emerging in the field of embedded systems design as a modeling
language. The UML notation is useful in capturing the requirements, documenting the structure,
decomposing into objects and defining relationships between objects. It is a notational language that is
very useful in modelling the real-time embedded systems. This paper presents the requirements and
analysis modelling of a real-time embedded system related to a control system application for platform
stabilization using COMET method of design with UML notation. These applications involve designing of
electromechanical systems that are controlled by multi-processors.
EMPIRICAL APPLICATION OF SIMULATED ANNEALING USING OBJECT-ORIENTED METRICS TO...ijcsa
The work is about using Simulated Annealing Algorithm for the effort estimation model parameter
optimization which can lead to the reduction in the difference in actual and estimated effort used in model
development.
The model has been tested using OOP’s dataset, obtained from NASA for research purpose.The data set
based model equation parameters have been found that consists of two independent variables, viz. Lines of
Code (LOC) along with one more attribute as a dependent variable related to software development effort
(DE). The results have been compared with the earlier work done by the author on Artificial Neural
Network (ANN) and Adaptive Neuro Fuzzy Inference System (ANFIS) and it has been observed that the
developed SA based model is more capable to provide better estimation of software development effort than
ANN and ANFIS
SE_Lec 05_System Modelling and Context ModelAmr E. Mohamed
System modeling is the process of developing abstract models of a system using graphical notations like the Unified Modeling Language (UML) to represent different views of a system. Models help analysts understand system functionality and communicate with customers. Models of existing and new systems are used during requirements engineering to clarify current systems, discuss strengths/weaknesses, and explain proposed requirements.
The document describes an algorithm for tolerating crash failures in distributed systems called the algorithm of mutual suspicion (AMS). AMS allows the backbone of a distributed application to tolerate failures of up to n-1 of its n components. Each node runs one agent of the backbone consisting of 3 tasks: D for the system database, I for monitoring "I'm alive" signals, and R for error recovery. The coordinator periodically sends "I'm alive" messages and assistants reply with acknowledgments. If a node does not receive the expected messages, it enters a suspicion period and may deduce a crashed component and initiate recovery actions.
This document provides an overview of system modeling. It discusses that system modeling involves developing abstract models of a system from different perspectives, and is commonly done using the Unified Modeling Language (UML). It also describes various UML diagram types used in system modeling like use case diagrams, class diagrams, and state diagrams. Finally, it gives examples of modeling different views of a mental health case management system, including contextual models, interaction models, structural models, and behavioral models.
SIMPLIFIED CBA CONCEPT AND EXPRESS CHOICE METHOD FOR INTEGRATED NETWORK MANAG...IJCNCJournal
This document proposes a simplified method for evaluating and selecting a network management system (NMS) for integration into an existing computer network. The method evaluates NMS options based on 3 criteria: 1) the level of integration risk, 2) the expected increase in network maintenance effectiveness, and 3) the level of management tasks completed by the system. Each criterion is evaluated on a standardized scale of 0 to 2. The scores are combined to calculate an overall value for each NMS, with the highest scoring option selected for integration. The method aims to provide a rapid evaluation that does not require extensive expertise, resources or time.
An Overview on Data Quality Issues at Data Staging ETLidescitation
A data warehouse (DW) is a collection of technologies
aimed at enabling the decision maker to make better and
faster decisions. Data warehouses differ from operational
databases in that they are subject oriented, integrated, time
variant, non volatile, summarized, larger, not normalized, and
perform OLAP. The generic data warehouse architecture
consists of three layers (data sources, DSA, and primary data
warehouse). During the ETL process, data is extracted from
an OLTP databases, transformed to match the data warehouse
schema, and loaded into the data warehouse database
The document discusses context models and their use in system modeling. Context models illustrate the operational context of a system by showing what lies outside its boundaries, including other systems in the environment. They help define a system's boundaries and show how IT applications fit into the context of people and organizations. Two examples are provided: (1) a Mental Health Care Patient Management System (MHC-PMS) and its connections to other clinical systems; (2) an Automated Teller Machine (ATM) and its links to banking systems. Context models on their own do not show relationships between external systems, so additional models are needed.
Architectural design is concerned with:
understanding how a software system should be organized and,
designing the overall structure of that system.
Architectural design is the critical link between design and requirements engineering, as it identifies the main structural components in a system and the relationships between them.
The output of the architectural design process is an architectural model that describes how the system is organized as a set of communicating components
Unit 4- Software Engineering System Model Notes arvind pandey
This document discusses system modeling techniques used in software engineering. It covers context models, behavioral models, data models, object models, and CASE workbenches. Different types of models present the system from external, behavioral, and structural perspectives. Common model types include data processing, composition, architectural, and classification models. The document provides examples of context models, state machine models, data flow diagrams, and object models. It also discusses semantic data models, object behavior modeling with sequence diagrams, and components of analysis and design workbenches.
The document discusses various topics related to software architecture and design including software design phases, goals and limitations of software architecture, data modeling types, database design life cycle, data warehouse modeling, analyzing alternative architectural designs both qualitatively and quantitatively, and measuring architectural complexity based on different dependency types.
The document discusses modeling different aspects of software systems using UML diagrams. It covers modeling events using state machines, the four types of events that can be modeled in UML (signals, calls, time, and state change), modeling logical database schemas using class diagrams, modeling source code using artifact diagrams, modeling executable releases using artifact diagrams to show deployment artifacts and relationships, and modeling physical databases by defining tables for classes while considering inheritance relationships.
This document summarizes the internship work conducted by Marta de la Cruz Martos at CITSEM within the GRyS group. The internship focused on developing algorithms to analyze energy consumption for smart grids as part of the I3RES project, which aims to integrate renewable energy sources into distributed networks using artificial intelligence. Specifically, the internship involved studying relevant technologies, participating in software component design, developing and implementing algorithms, and preparing reports. The document provides background on distributed systems and databases, describes the work conducted, and presents results and conclusions.
System models abstractly describe systems being analyzed and are used to communicate with customers. Different models show the system from external, behavioral, and structural perspectives. Common system models include context models depicting system boundaries, data flow diagrams modeling data processing, state machine models representing system states and transitions, and object models describing the system in terms of object classes and relationships. The Unified Modeling Language provides standard notations for object-oriented modeling.
The document discusses UML deployment diagrams which visualize the physical topology of a system where software artifacts are deployed. Deployment diagrams show nodes, which can be device or execution environment nodes, and artifacts deployed on the nodes. Communication paths represent connections between deployment targets that allow exchange of signals and messages. Deployments show the allocation of artifacts to deployment targets using dependencies labeled with "deploy". An example diagram depicts the deployment of a web application across load balanced servers.
This document introduces systems analysis and design. It defines a system as a collection of components that work together to achieve objectives. It describes the main phases of the system development life cycle as preliminary study, feasibility study, detailed study, analysis, design, coding, testing, implementation, and maintenance. Each phase is described in 1-2 sentences. The purpose is to explain the process of developing and maintaining systems through an organized approach.
This summary provides an overview of the key concepts discussed in the document:
1. The document discusses various object-oriented analysis and design concepts including use case modeling, the Unified Modeling Language (UML), activity diagrams, associations, aggregation, and composition.
2. It provides descriptions and examples of these concepts, such as defining use cases, actors, and use case diagrams. Activity diagrams are described as showing workflows and processes.
3. The document also discusses UML notation for modeling associations, including binary and ternary associations, and modeling cardinality ratios between associated classes.
The document discusses various behavioral diagrams in UML including use case diagrams, sequence diagrams, collaboration diagrams, state machine diagrams and activity diagrams. It provides details on how to model scenarios and interactions using these diagrams, including modeling conditional paths, asynchronous messages, procedural vs flat sequencing, and how interaction diagrams relate to use cases at different levels of abstraction.
an analysis and new methodology for reverse engineering of uml behavioralINFOGAIN PUBLICATION
The emergence of Unified Modeling Language (UML) as a standard for modeling systems has encouraged the use of automated software tools that facilitate the development process from analysis through coding. Reverse Engineering has become a viable method to measure an existing system and reconstruct the necessary model from its original. The Reverse Engineering of behavioral models consists in extracting high-level models that help understand the behavior of existing software systems. In this paper we present an ongoing work on extracting UML diagrams from object-oriented programming languages. we propose an approach for the reverse engineering of UML behavior from the analysis of execution traces produced dynamically by an object-oriented application using formal and semi-formal techniques for modeling the dynamic behavior of a system. Our methods show that this approach can produce UML behavioral diagrams in reasonable time and suggest that these diagrams are helpful in understanding the behavior of the underlying application.
Formal Verification of Distributed Checkpointing Using Event-Bijcsit
The document describes formal verification of checkpointing in a distributed database system using Event-B. It presents an Event-B model that specifies the checkpointing process. Key aspects of the model include assigning timestamps to messages and transactions, marking transactions as before or after checkpoint based on their timestamps, and computing a global checkpoint number. The model is verified using the Rodin tool to ensure the checkpointing process satisfies correctness properties.
This document discusses dynamic resource allocation using virtual machines. It begins by introducing cloud computing and how it allows scaling of resource usage based on demand through virtualization technology. It then analyzes the existing system of mapping virtual machines to physical resources and proposes an automated resource management system to achieve a balance between overload avoidance and green computing. The key modules of the proposed system are described as the cloud computing module, resource management module, and virtualization module. It further discusses system requirements, feasibility analysis, various UML diagrams including use case diagrams and sequence diagrams, and concludes with describing the software technologies used.
Interaction overview and Profile UML DiagramsHusnain Safdar
The document discusses two UML diagrams: Interaction Overview Diagram and Profile Diagram. The Interaction Overview Diagram focuses on the flow of control of interactions and visualizes a sequence of activities using nested interaction diagrams. The Profile Diagram is an extensibility mechanism that allows customizing UML using stereotypes, tagged values, and constraints to make the language suitable for a specific domain. Stereotypes introduce new model elements, tagged values add additional properties, and constraints specify semantics or conditions that must be true.
The document discusses object-oriented analysis and design concepts like refinement, extensibility, and design for reusability. It provides details on different types of extensibility like white-box, black-box, and gray-box extensibility. It also discusses object-oriented database management systems and compares relational databases with object-oriented databases.
The document discusses UML component diagrams. It defines a component as a modular, deployable, and replaceable part of a system that encapsulates implementation and exposes interfaces. It describes how component diagrams show the various components in a system and their dependencies. It outlines the purpose of component diagrams as visualizing components, constructing executables through forward and reverse engineering, and describing component organization and relationships.
Bacteriology of otitis media among patients attending generaltheijes
Otitis media is the inflammation of the middle ear and has a worldwide distribution, particularly among children. A total of 68 patients between the ages 0-42 years who presented with sign and symptoms of otitis media at Bichi general hospital were enrolled for this study. Middle ear discharge were collected, processed and bacterial isolates identified using standard microbiological techniques. Disc susceptibility tests were performed on bacterial isolates. Results indicated that there was a high frequency of occurrence of bacteria incriminated in otitis media in the 0-5 and 6-11 year age groups in the two sexes. Male patients in the two age groups were more infected than the female counterparts. The sensitivity pattern obtained in this study show a progressive increase in the emergence of strains that are resistant to many chemotherapeutic agents. Drug resistance among bacterial isolates is a common phenomenon placing challenge to both medical practitioners and genetic scientists. A routine check on sensitivity patterns among these pathogens is vital so as to regulate the prescription measure to be employed.
Effect of Sand invasion on Oil Well Production: A Case study of Garon Field i...theijes
The effect of sand and other BS&W invading the wellbore of an oil well has been studied using Garon field in the Niger Delta region. Garon field has unconsolidated formation and it has been producing for more than 10 years. This study is carried out to quantify the safety and economic effect of sand invasion on well productivity and not on the techniques in numerical models for the prediction of sand production. It tries to look out the sand evolution, analysis of previous well test done and a survey of sand identification, results of some wells production data and evaluation of the effect of sand invasion on subsurface and surface production facilities. In this study, Well X17 was routed into a test separator for 3days and immediately tested for 72hours. The test separator man way opened in other to ascertain the quantity of sand produced from the well for 72Hrs to validate the result obtained with Clampon DSC. Also presented are the effects of sand invasion on surface facility, choke, screen and tubing.
An Overview on Data Quality Issues at Data Staging ETLidescitation
A data warehouse (DW) is a collection of technologies
aimed at enabling the decision maker to make better and
faster decisions. Data warehouses differ from operational
databases in that they are subject oriented, integrated, time
variant, non volatile, summarized, larger, not normalized, and
perform OLAP. The generic data warehouse architecture
consists of three layers (data sources, DSA, and primary data
warehouse). During the ETL process, data is extracted from
an OLTP databases, transformed to match the data warehouse
schema, and loaded into the data warehouse database
The document discusses context models and their use in system modeling. Context models illustrate the operational context of a system by showing what lies outside its boundaries, including other systems in the environment. They help define a system's boundaries and show how IT applications fit into the context of people and organizations. Two examples are provided: (1) a Mental Health Care Patient Management System (MHC-PMS) and its connections to other clinical systems; (2) an Automated Teller Machine (ATM) and its links to banking systems. Context models on their own do not show relationships between external systems, so additional models are needed.
Architectural design is concerned with:
understanding how a software system should be organized and,
designing the overall structure of that system.
Architectural design is the critical link between design and requirements engineering, as it identifies the main structural components in a system and the relationships between them.
The output of the architectural design process is an architectural model that describes how the system is organized as a set of communicating components
Unit 4- Software Engineering System Model Notes arvind pandey
This document discusses system modeling techniques used in software engineering. It covers context models, behavioral models, data models, object models, and CASE workbenches. Different types of models present the system from external, behavioral, and structural perspectives. Common model types include data processing, composition, architectural, and classification models. The document provides examples of context models, state machine models, data flow diagrams, and object models. It also discusses semantic data models, object behavior modeling with sequence diagrams, and components of analysis and design workbenches.
The document discusses various topics related to software architecture and design including software design phases, goals and limitations of software architecture, data modeling types, database design life cycle, data warehouse modeling, analyzing alternative architectural designs both qualitatively and quantitatively, and measuring architectural complexity based on different dependency types.
The document discusses modeling different aspects of software systems using UML diagrams. It covers modeling events using state machines, the four types of events that can be modeled in UML (signals, calls, time, and state change), modeling logical database schemas using class diagrams, modeling source code using artifact diagrams, modeling executable releases using artifact diagrams to show deployment artifacts and relationships, and modeling physical databases by defining tables for classes while considering inheritance relationships.
This document summarizes the internship work conducted by Marta de la Cruz Martos at CITSEM within the GRyS group. The internship focused on developing algorithms to analyze energy consumption for smart grids as part of the I3RES project, which aims to integrate renewable energy sources into distributed networks using artificial intelligence. Specifically, the internship involved studying relevant technologies, participating in software component design, developing and implementing algorithms, and preparing reports. The document provides background on distributed systems and databases, describes the work conducted, and presents results and conclusions.
System models abstractly describe systems being analyzed and are used to communicate with customers. Different models show the system from external, behavioral, and structural perspectives. Common system models include context models depicting system boundaries, data flow diagrams modeling data processing, state machine models representing system states and transitions, and object models describing the system in terms of object classes and relationships. The Unified Modeling Language provides standard notations for object-oriented modeling.
The document discusses UML deployment diagrams which visualize the physical topology of a system where software artifacts are deployed. Deployment diagrams show nodes, which can be device or execution environment nodes, and artifacts deployed on the nodes. Communication paths represent connections between deployment targets that allow exchange of signals and messages. Deployments show the allocation of artifacts to deployment targets using dependencies labeled with "deploy". An example diagram depicts the deployment of a web application across load balanced servers.
This document introduces systems analysis and design. It defines a system as a collection of components that work together to achieve objectives. It describes the main phases of the system development life cycle as preliminary study, feasibility study, detailed study, analysis, design, coding, testing, implementation, and maintenance. Each phase is described in 1-2 sentences. The purpose is to explain the process of developing and maintaining systems through an organized approach.
This summary provides an overview of the key concepts discussed in the document:
1. The document discusses various object-oriented analysis and design concepts including use case modeling, the Unified Modeling Language (UML), activity diagrams, associations, aggregation, and composition.
2. It provides descriptions and examples of these concepts, such as defining use cases, actors, and use case diagrams. Activity diagrams are described as showing workflows and processes.
3. The document also discusses UML notation for modeling associations, including binary and ternary associations, and modeling cardinality ratios between associated classes.
The document discusses various behavioral diagrams in UML including use case diagrams, sequence diagrams, collaboration diagrams, state machine diagrams and activity diagrams. It provides details on how to model scenarios and interactions using these diagrams, including modeling conditional paths, asynchronous messages, procedural vs flat sequencing, and how interaction diagrams relate to use cases at different levels of abstraction.
an analysis and new methodology for reverse engineering of uml behavioralINFOGAIN PUBLICATION
The emergence of Unified Modeling Language (UML) as a standard for modeling systems has encouraged the use of automated software tools that facilitate the development process from analysis through coding. Reverse Engineering has become a viable method to measure an existing system and reconstruct the necessary model from its original. The Reverse Engineering of behavioral models consists in extracting high-level models that help understand the behavior of existing software systems. In this paper we present an ongoing work on extracting UML diagrams from object-oriented programming languages. we propose an approach for the reverse engineering of UML behavior from the analysis of execution traces produced dynamically by an object-oriented application using formal and semi-formal techniques for modeling the dynamic behavior of a system. Our methods show that this approach can produce UML behavioral diagrams in reasonable time and suggest that these diagrams are helpful in understanding the behavior of the underlying application.
Formal Verification of Distributed Checkpointing Using Event-Bijcsit
The document describes formal verification of checkpointing in a distributed database system using Event-B. It presents an Event-B model that specifies the checkpointing process. Key aspects of the model include assigning timestamps to messages and transactions, marking transactions as before or after checkpoint based on their timestamps, and computing a global checkpoint number. The model is verified using the Rodin tool to ensure the checkpointing process satisfies correctness properties.
This document discusses dynamic resource allocation using virtual machines. It begins by introducing cloud computing and how it allows scaling of resource usage based on demand through virtualization technology. It then analyzes the existing system of mapping virtual machines to physical resources and proposes an automated resource management system to achieve a balance between overload avoidance and green computing. The key modules of the proposed system are described as the cloud computing module, resource management module, and virtualization module. It further discusses system requirements, feasibility analysis, various UML diagrams including use case diagrams and sequence diagrams, and concludes with describing the software technologies used.
Interaction overview and Profile UML DiagramsHusnain Safdar
The document discusses two UML diagrams: Interaction Overview Diagram and Profile Diagram. The Interaction Overview Diagram focuses on the flow of control of interactions and visualizes a sequence of activities using nested interaction diagrams. The Profile Diagram is an extensibility mechanism that allows customizing UML using stereotypes, tagged values, and constraints to make the language suitable for a specific domain. Stereotypes introduce new model elements, tagged values add additional properties, and constraints specify semantics or conditions that must be true.
The document discusses object-oriented analysis and design concepts like refinement, extensibility, and design for reusability. It provides details on different types of extensibility like white-box, black-box, and gray-box extensibility. It also discusses object-oriented database management systems and compares relational databases with object-oriented databases.
The document discusses UML component diagrams. It defines a component as a modular, deployable, and replaceable part of a system that encapsulates implementation and exposes interfaces. It describes how component diagrams show the various components in a system and their dependencies. It outlines the purpose of component diagrams as visualizing components, constructing executables through forward and reverse engineering, and describing component organization and relationships.
Bacteriology of otitis media among patients attending generaltheijes
Otitis media is the inflammation of the middle ear and has a worldwide distribution, particularly among children. A total of 68 patients between the ages 0-42 years who presented with sign and symptoms of otitis media at Bichi general hospital were enrolled for this study. Middle ear discharge were collected, processed and bacterial isolates identified using standard microbiological techniques. Disc susceptibility tests were performed on bacterial isolates. Results indicated that there was a high frequency of occurrence of bacteria incriminated in otitis media in the 0-5 and 6-11 year age groups in the two sexes. Male patients in the two age groups were more infected than the female counterparts. The sensitivity pattern obtained in this study show a progressive increase in the emergence of strains that are resistant to many chemotherapeutic agents. Drug resistance among bacterial isolates is a common phenomenon placing challenge to both medical practitioners and genetic scientists. A routine check on sensitivity patterns among these pathogens is vital so as to regulate the prescription measure to be employed.
Effect of Sand invasion on Oil Well Production: A Case study of Garon Field i...theijes
The effect of sand and other BS&W invading the wellbore of an oil well has been studied using Garon field in the Niger Delta region. Garon field has unconsolidated formation and it has been producing for more than 10 years. This study is carried out to quantify the safety and economic effect of sand invasion on well productivity and not on the techniques in numerical models for the prediction of sand production. It tries to look out the sand evolution, analysis of previous well test done and a survey of sand identification, results of some wells production data and evaluation of the effect of sand invasion on subsurface and surface production facilities. In this study, Well X17 was routed into a test separator for 3days and immediately tested for 72hours. The test separator man way opened in other to ascertain the quantity of sand produced from the well for 72Hrs to validate the result obtained with Clampon DSC. Also presented are the effects of sand invasion on surface facility, choke, screen and tubing.
Detection of Glaucoma using Optic Disk and Incremental Cup Segmentation from ...theijes
The document presents a new approach for detecting glaucoma using optic disk and incremental cup segmentation from retinal images. It proposes segmenting the optic disk using an automatic parameterized technique and modeling the cup region as enclosing pallor enclosed by vessel bends (r-bends). An incremental cup segmentation method uses 3D spline interpolation to derive the cup boundary considering anatomical knowledge from glaucoma experts. Results are compared to existing methods on different retinal images and show improved cup segmentation, especially in regions without depth cues where inter-observer variability is high. The approach integrates appearance and anatomical information for more accurate glaucoma assessment through optic disk and cup segmentation.
An Automatic Attendance System Using Image processingtheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Improvisation: an alternative approach to solving the problem of ill-equipped...theijes
Effective teaching for quality science education can only be achieved through “learning by doing” (practical) in well-equipped laboratory. However, ill-equipped science laboratories have reached an alarming level thereby making learning by doing impossible. This paper takes a look at the concept and skills or techniques of improvising biology teaching equipment (instructional materials) in Agricultural science as a viable alternative and a panacea to ill-equipped laboratories in post-basic education in Nigeria. The paper concludes that ill-equipped laboratories is one of the myriad of problems currently facing the teaching and learning of Biology and Agricultural science in Nigerian Senior Secondary Schools that needs urgent attention from all stakeholders in science education as government alone cannot solve the problem.
Trust Providence in Delay Tolerant Networkstheijes
The network consists of several nodes, some nodes represents malicious and selfish behavior. This gives the heavy threat for the routing in Delay Tolerant networks(DTNs). The DTNs have unique characteristic so designing a misbehavior detection scheme is very difficult. The probabilistic misbehavior detection scheme that is iTrust, is established for secure routing in DTN. The iTrust introduces a Trusted Authority (TA) for detecting the node’s behavior. By collecting the routing evidences from the nodes the TA checks the node about its behavior then performs the appropriate actions for the behavior of nodes. TA gives the security of DTN routing at lower cost. The detection probability is correlated with a node’s reputation, this gives the dynamic detection probability based on the trust of users. The simulation results show that the proposed scheme is efficient for establishing trust with the DTNs.
Estimation of Spatial Variability of Land Surface Temperature using Landsat 8...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
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Computer based Wireless Automobile Wheel Alignment system using Accelerometertheijes
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A computer network plays a major part in the development of any industry. Nowadays, in this fast paced
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paced world, the attack to disable the progress are also fast paced. DDoS (Distributed Denial of Service) is one
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Structural and Dielectric Studies of Cerium Substituted Nickel Ferrite Nano P...theijes
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Environmental Hazard Effects: Critical Issue relating to Agricultural Product...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Geophysical Evaluation of Lateral Continuity of some part of Ikere Kaolin Dep...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Design and control of renewable power system through wsn in mirogridtheijes
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Microbial Fuel Cell (MFC) based Sewage Treatment Plants (STP)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Analysis of Economic Market and Energy Potential Indicators for Biomass in Si...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Compressive strength evaluation of Human hair and Polypropylene fabricated re...theijes
With the rise of population the uses of conventional and non-conventional resources are highly increased. As we know the resources available are limited to their origin but the uses also may not be affected as well according to their importance. There are some resources like natural fibres have not come under proper attention in passing years, even some of which like human hair are destroyed as a waste material. But after knowing better sides of these fibres, they are getting a proper attention over the years. With the aim of utilizing abundant waste material, a human hair composite has been developed using human hair as reinforcing constituent and polypropylene as matrix constituents. This paper presents fabrication and properties evaluation of human hair reinforced polypropylene composite. Composites with various compositions of human hair and polypropylene were fabricated. The composite with human hair came out to be better for reinforcement among various composites. The fabricated specimen composed of various % of human hair in polypropylene is tested for properties improvement and came out as an eye opener. The mechanical properties are highly improved and results are properly evaluated and analysed.
Ontology-Based Routing for Large-Scale Unstructured P2P Publish/Subscribe Systemtheijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
The document discusses different approaches and methods for synchronizing team members during software development projects. It describes static waterfall and agile iterative development processes. It also introduces Unified Modeling Language (UML) diagrams for visually representing software architecture and interactions, including activity diagrams, sequence diagrams, and use case diagrams. These diagrams use standardized symbols and notation to clearly depict processes, objects, messages, and functionality.
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The methodology captures requirements at a high level using
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A MOBILE AGENT-BASED P2P E-LEARNING SYSTEM
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Department of Information and Knowledge Engineering
Tottori University
4–101, Koyama-Minami
Tottori, JAPAN
ABSTRACT
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In the analysis phase, it discusses software requirements specifications, business analysts, and their roles in initiating projects, elaborating details, and supporting implementation.
The design phase covers use case diagrams, data flow diagrams, sequence diagrams, and class diagrams. It provides examples of how to draw and use each type of diagram.
Coding involves programming languages like Java. Testing discusses the JUnit testing framework and Selenium, an open source web testing tool, covering their features and why Selenium is commonly used for automated testing.
The document discusses various phases of the software development life cycle (SDLC) including analysis, design, coding, and testing.
In the analysis phase, it discusses software requirements specifications, business analysts, and their roles in initiating projects, elaborating details, and supporting implementation.
The design phase covers use case diagrams, data flow diagrams, sequence diagrams, and class diagrams. It provides examples of how to draw and use each type of diagram.
Coding involves programming languages like Java. Testing discusses the JUnit testing framework and Selenium, an open source web testing tool, covering their features and why Selenium is commonly used for automated testing.
Availability Assessment of Software Systems Architecture Using Formal ModelsEditor IJCATR
There has been a significant effort to analyze, design and implement the information systems to process the information and data, and solve various problems. On the one hand, complexity of the contemporary systems, and eye-catching increase in the variety and volume of information has led to great number of the components and elements, and more complex structure and organization of the information systems. On the other hand, it is necessary to develop the systems which meet all of the stakeholders' functional and non-functional requirements. Considering the fact that evaluation and assessment of the aforementioned requirements - prior to the design and implementation phases - will consume less time and reduce costs, the best time to measure the evaluable behavior of the system is when its software architecture is provided. One of the ways to evaluate the architecture of software is creation of an executable model of architecture.
The present research used availability assessment and took repair, maintenance and accident time parameters into consideration. Failures of software and hardware components have been considered in the architecture of software systems. To describe the architecture easily, the authors used Unified Modeling Language (UML). However, due to the informality of UML, they utilized Colored Petri Nets (CPN) for assessment too. Eventually, the researchers evaluated a CPN-based executable model of architecture through CPN-Tools.
The document discusses various types of Unified Modeling Language (UML) diagrams used for software modeling including state machine diagrams, deployment diagrams, package diagrams, component diagrams, and timing diagrams. It provides descriptions of each diagram type including their purpose and how they are used to model different aspects of software design.
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The document presents a technique for automatically restructuring functions with low cohesion into functions with higher cohesion. It does this by partitioning the output variables of a function based on their pairwise cohesion, as measured by rules that encode principles of cohesion discovered by previous research. Program slicing is then used to identify statements computing each variable group, and new functions are created from these slices to replace the original function. The technique aims to decompose functions into natural units of activity, as a human programmer would, in order to improve understandability and maintainability.
The document describes the system design, implementation, and testing of an Android-based mobile application called ABNNS. It defines the design goals, subsystem decomposition, and deployment diagram. It also includes UML class, state, and deployment diagrams. The application allows users to add and view information notifications. It was tested using unit, functional, and integration testing on the emulator and devices. Constraints in development included lack of experience with Android and debugging issues. Recommendations included offering related courses earlier and providing resources to support Android application development.
This document discusses various system modeling techniques, including context models, interaction models, structural models, and behavioral models. It provides examples of each type of model using the Unified Modeling Language (UML). Context models show the system and its relationships to other external systems. Interaction models include use case diagrams and sequence diagrams. Structural models include class diagrams, which depict classes and relationships. Behavioral models show how a system responds to events. The document also discusses object-oriented design, implementation issues, and open source development.
The document discusses the design and implementation process in software engineering. It covers topics like using the Unified Modeling Language (UML) for object-oriented design, design patterns, and implementation issues. It then discusses the design process, including identifying system contexts and interactions, architectural design, identifying object classes, and creating design models like subsystem, sequence, and state diagrams. The example of designing a weather station system is used to illustrate these design concepts and activities.
This document describes a methodology for simulating heterogeneous embedded systems that include hardware, software, and electromechanical parts. Interfaces were developed to allow a VHDL simulator to communicate with a physical systems simulator and application programs. The interfaces use the C language links of the simulators to establish communication channels and exchange commands/parameter values between the simulated parts in a chained master/slave synchronization scheme. This unified simulation environment allows designers to validate the behavior of the entire system early in the design process before implementing any of its parts.
This document discusses the design and implementation chapter of a lecture. It covers topics like using UML for object-oriented design, design patterns, and implementation issues. It then discusses the weather station case study used to illustrate the design process, including defining system context, use cases, architectural design, identifying object classes, design models, and interface specification.
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This document presents a framework for software timing analysis using UML sequence diagrams. The framework involves first gathering requirements and creating a sequence diagram. The sequence diagram is then converted to a label transition graph. Algorithms are applied to reduce the graph to a path expression and determine the minimum and maximum path lengths, representing the minimum and maximum time taken for the application. A case study applying this process to the timing analysis of a purchasing process in a mall is presented as an example. The advantage of this approach is that timing requirements can be analyzed early in the requirements stage from the UML models.
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Authors
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Non-Orthogonal Multiple Access (NOMA) helps to overcome various difficulties in future technology wireless communications. NOMA, when utilized with millimeter wave multiple-input multiple-output (MIMO) systems, channel estimation becomes extremely difficult. For reaping the benefits of the NOMA and mm-Wave combination, effective channel estimation is required. In this paper, we propose an enhanced particle swarm optimization based long short-term memory estimator network (PSOLSTMEstNet), which is a neural network model that can be employed to forecast the bandwidth required in the mm-Wave MIMO network. The prime advantage of the LSTM is that it has the capability of dynamically adapting to the functioning pattern of fluctuating channel state. The LSTM stage with adaptive coding and modulation enhances the BER.PSO algorithm is employed to optimize input weights of LSTM network. The modified algorithm splits the power by channel condition of every single user. Participants will be first sorted into distinct groups depending upon respective channel conditions, using a hybrid beamforming approach. The network characteristics are fine-estimated using PSO-LSTMEstNet after a rough approximation of channels parameters derived from the received data.
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A Model of Local Area Network Based Application for Inter-office Communication
1. The International Journal Of Engineering And Science (IJES)
|| Volume || 4 || Issue || 5 || Pages || PP.32-39 || 2015 ||
ISSN (e): 2319 – 1813 ISSN (p): 2319 – 1805
www.theijes.com The IJES Page 32
A Model of Local Area Network Based Application for Inter-
office Communication
George Elechi C.1
, Israel Etu2
and Kufre Esenowo Jack3
1
Department of Computer Science, Akanu Ibiam Federal Polytechnic, Unwana Afikpo, Ebonyi State, Nigeria
2&3
Department of Electrical/Electronic Engineering, Akanu Ibiam Federal Polytechnic, Unwana Afikpo,
Ebonyi State, Nigeria
--------------------------------------------------------ABSTRACT---------------------------------------------------
In most organizations, information circulation within offices poses a problem because clerical officers and
office messengers usually dispatch letters and memos from one office to another manually. Sequel to this
circulation procedure, implementation of decisions is always difficult and slow. On one hand, clerical officers
sometimes divulge confidential information during the process of receiving and sending of mails and other
documents. On the other hand, money is wasted on the purchase of paper for printing. However, it is cheerful to
learn that technology has made it possible for staff, structures and infrastructures to control and share
organization resources; hardware; software and knowledge by means of modern electronic communication.
One cannot deny the fact that the flow of information is very imperative in every organization as it determines
the effectiveness of decision-making and implementation. This feat can be achieved using Object-Oriented
System Analysis and Design Methodology (OSADM). This is structurally analyzed with Use Case Diagram
(UCD), Class Diagram, Sequence Diagram, State Transition Diagram, and Activity Diagram. Moreover, the
system is coded with Java 1.6 version, in a client-server network running on star topology in LAN environment.
This is the concept of this paper. The system is designed to work in two parts – the control part that is installed
on the server; and the messenger part that is installed in the clients. This research work integrates the utility
and organization resources into a shared center for all users to have access to; and for free communication
during office hours.
Keywords: LAN; Client; Server; Java; Clerical officer.
---------------------------------------------------------------------------------------------------------------------------------------
Date of Submission: 27-April-2015 Date of Accepted: 15-May-2015
--------------------------------------------------------------------------------------------------------------------------------------
I. INTRODUCTION
Every functioning system must comprise active subsystems; and for the main system to comprehend its
objectives, the communication trends of the subsystem must be certainly effective. Mbam (2009) stated that
networks enable clients to share resources (printer, software, scanner, camera, files or documents, mails or
messages etc.). A communication application can be designed to work on Local Area Network, for an
organization to enable users share information concerning the organization. With this software, efficient sharing
of company resources and smooth coordination of office information are ensured. With this, all memos and
short messages can be sent between the network users even with the absence of internet facilities and telephone
line. This is to allow the staff to have free communication with each other in a more friendly and efficient way
using LAN-networked environment.
Aims
This research is aimed at developing messenger software, and ensuring that the systems are linked for effective
communication.
Objectives
The objectives of this work include:
1. To design messenger software to be installed in an organization LAN for the purpose of information
circulation.
2. To build a model to ensure the security of messages transmitted on the system.
3. To develop a model of a system that would keep track of information flow within the organization.
4. To incorporate a model for an electronic bulletin board for the organization.
2. A Model of Local Area Network Based Application…
www.theijes.com The IJES Page 33
II. RESEARCH MATERIALS AND METHOD
Materials
The materials used in this work include Printer, JDK 1.6, XAMPP, Inno Setup Compiler, Active LAN, Clients
and Server
Method
There are many existing methodologies for system analysis and design. However, the chosen methodology for
this work is object-oriented system analysis and design methodology as well as unified processes of prototyping
model with JDK 1.6 version of java.
Proposed System Model
According to Rajib (2010), a model is an abstraction of a real problem (or situation) and is constructed by
leaving out unnecessary details. This reduces the problem of complexity and makes it easy to understand the
problem (or situation). A model can also be said to be a simplified version of the real system. It is useful to think
of a model as capturing aspects important for some applications while omitting (or abstracting) the rest. The
considered model for the proposed system is Unified Model Language (UML).It can be used to correct nine
different types of diagrams to capture five different views of a system. UML diagrams provide different
perspectives of a software system to be developed and facilitate a comprehensive understanding of the system.
Once a system has been modeled from all the required perspectives, the constructed models can be modified to
get the actual implementation of the system. The UML diagrams capture the following views (models) of a
system:
Users’ view
Structural view
Behavioral view
Implementation view
Environmental view
Rajib (2010) stated that the program’s control flow structure indicates the sequence in which the program’s
instructions are executed. Many programmers found it increasingly difficult not only to write correct
programs, but also to comprehend and manage codes written by others. To braze up with this problem,
experienced programmers advised others to pay attention to the design of a program’s control flow
structure. A program having a good control flow structure would be easier to develop and understand. The
main reason behind this situation is that normally one understands a program by mentally tracing its
execution sequence to understand how the output is produced from the input values. The software was
analyzed with CASE diagram.
Figure1.The CASE Model for LAN Messenger
Class Diagram
The class diagram presents the static structure of a system. It shows how a system is structured rather than how
it behaves. The static structure of a system comprises a number of class diagrams and their dependencies. The
main constituents of a class diagram are classes and their relationships: generalization, aggregation, association,
and various kinds of dependencies. The description structures of this system can be extended with the below
class diagram.
3. A Model of Local Area Network Based Application…
www.theijes.com The IJES Page 34
Figure 2. Illustration of the relationship classes diagram
System Processes
The system process is a well-arranged procedure of actions to accomplish a working system. A process is a
series of actions directed towards a specific aim, or series of natural occurrence that produce change or
development (Encarta,2009). However, we analyze the system using a process flow diagram/sequence diagram
as shown in figure 3 below.
This is a diagram that shows the processes that will be carried out in the system.
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Figure 3. Analysis of the sequential diagram
This above flow describes the process that takes places to accomplish the work of this research. The process
follows from authentication users into the network, and then establishes links to nodes, after which messages
can be sent from node to node (or nodes). The receiver then reads, saves, prints and replies messages. The above
processes are synchronized for the success of the output, from the sender to the receiver and lastly to the
respondents. The detail of the process flow will be analyzed in details to show every process involved in the
chain, from adding new user into the system, the necessary functions, termination and what happens to error
messages.
State Transition Diagram
A state chart diagram is usually used to model how the state of an object changes in its life time. It is good in
describing how the behavior of an object changes across several use case executions. State transition diagrams
are based on the Finite State Machine (FSM) formalism. The object undergoes state changes when specific
events occur. A state chart is a pyramidal model of a system which brings up the idea of a combined state (also
referred to as nested state).
Actions go with transitions and are seen, as processes that take place quickly without interruption. Activities
have to do with states and can take longer; it can also be interrupted by an event. So, the state transition diagram
of this research analysis is shown in figure 4 below
Figure 4. The state transition diagram
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Activity Diagram
This activity diagram focuses on representing various activities or chunks of processing and their
sequence of activation. An activity is a state with an in-house movement and one or more outgoing transitions
which automatically follows the termination of the in-house movement. Activity diagrams are similar to the
procedural flow charts. The main difference is that activity diagrams support the description of parallel activities
and synchronization aspect involved in different activities. Activity diagrams are also useful to understand
difficult processing activities involving the roles played by many components. Besides helping the developer to
understand the complex processing activities; it was also used to develop interaction diagrams that help to
allocate activities (duties) to classes. This is shown in figure 5 below.
Table 1. The input designed table
Table 2. Output data specification
FIELD NAME DATA TYPE DESCRIPTION
Mail Text Short Message
Memo Memo Plain Text
Letter Long Text Plain Text
Bulletin Long Text Plain Text
FIELD NAME DATA TYPE DESCRIPTION FIELD PROPERTIES
Users Name Text One Word 255
Password Text A Word 255
IP Address Number IP Number Long Integer
SMS Text Short Message Short Text
Memo Memo Plain Text Long Text
Letter Long Text Plain Text Long Text
Mail Long Text Plain Text Short Text
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Database Architectural Design
Figure 6. The database architecture
The Hardware Architecture Design
The diagram in figure 7 shows the connection of various sections which involves in the system.
The below diagram illustrated the arrangement of nodes on organization LAN. This shows exactly the nodes and
its arrangement in every section in figure 6 above.
Figure 7. The network topological design
Pseudo Code of the Program
1 START CLIENT PROGRAM
2 LOGIN
3 CHECK AUTHENTICITY
4 IF OK
5 CONNECT LINKS
6 LOAD MENU
7 ITEM 1. SMS
8 ITEM 2. MEMO
9 ITEM 3. LETTER
10 ITEM 4. BULLETIN
11 SELECT ITEM 1
Server
Printer
Wimax
Antenna
Client A
Database
Client B
Client C
Client D
Server
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12 TYPE SMS
13 SEND SMS
14 RECEIVE SMS
15 READ SMS
16 DELETE SMS
17 PRINT SMS
18 SELECT ITEM 2
19 REUSE LINE NO. 12 TO 16
20 SELECT ITEM 3
21 REUSE LINE NO. 18
22 SELECT ITEM 4
23 SEND MESSAGE
24 READ MESSAGE
25 PRINT MESSAGE
26 CLOSE CLIENT PROGRAM
27 START SERVER PROGRAM
28 ADMINISTRATOR LOGIN
29 USE PORT NUMBER
30 USE CLIENT REGISTRATION IN DATA BASE
31 SEND IP ADDRESS
32 CONNECT LINKS
33 MONITOR LINKS
34 SHARE RESOURCES
35 RESTRICT RESOURCES
36 END PROGRAM
37 STOP
System Implementation
This system was implemented on Windows operating system with network facilities. The network topology
could be any type, but there must be full interconnections between systems. These systems must have
functioning working Ethernet card, and Transmission Control Protocol/Internet Protocol (TCP/IP) must be
installed and well configured on all the systems of the network.
Two programs were designed for this system – one for the server and the other for the clients. The software
meant for clients are installed on the clients while that of the server are installed on the server. The server would
be able to see the client through the port address and assigned IP address to the client to enable it register and
assume duty as a member of its node.
Expected and Actual Result
Table 3. Expected and Actual Result
SN Test Data Expected Result Actual Result
1 Sign-in To restrict unwanted users from
accessing the link. Also to save the
registered information on the
database
The passwords were encrypted and
saved in database, so server can easily
track any user at any time
2 E-Messenger The application is expected to
transmit messages like a memo,
letter and SMS from one node to
another node in the LAN.
The application successfully
transmitted office messages (Memos,
Letters and Short Messages) from one
computer to another via LAN link
3 E-Bulletin To have a central electronic bulletin
board, to serve all users within the
network coverage
The clients have access to the bulletin
board to read and post information to
the board
4 Database To have an effective central
database to save a copy of each
document that passes through the
server
The server saves each record that
passes through it to the database.
These records can be recalled
whenever the need arises.
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However, the system was designed and tested on dual core and Pentium system in a fully functioning LAN
environment.
Discussion of Results
This system was installed in a campus LAN with a cable network, and it worked efficiently except, of course, on
some systems with bad LAN cable. However, the transmission was a bit slow, despite that the LAN speed was
86kbs. For the server to manage the database, there was the need to ensure that every transmission passes
through network server instead of moving straight to the receiver system. This was what slowed down the
information transmission speed. Nevertheless, the main objectives of the system were achieved.
Conclusion
The system was analyzed in a LAN environment, and the connection was properly systemized in a linked chain.
Both the client application and server application were carefully installed and linked through the IP addresses,
though the program recognized clients through the port numbers, for sending and receiving of signals from both
ends to various units.
Recommendation
The recommendation is for any researcher that is interested in this work to study further on how to integrate
multimedia into this communication system. Also, he should work towards increasing the speed and extend this
program to work on Wide Area Network (WAN).
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