International Journal of Informatics and Communication Technology (IJ-ICT)
Not a member yet
494 research outputs found
Sort by
Proposing a Practical Method for Conceptual Design Process in New Product Development: Medical Glasses as a Case Study
Get PDFNowadays,improving the quality of products, reducing cost and meeting customer’srequirements are necessary to shorten the time of new product development(NPD). NPD is used to describe the complete process of bringing a new product to market and conceptual design process(CDP) is at its early stage and has mostly changed from passive respond toaggressive one. Thus, this study proposed a practical method for CDP in NPDthrough three phases as Converting customers’ requirements to product specifications,Generating and selecting of concepts and Testing and finalizing the concepts byusing some different management-engineering techniques. Firstly, this papertried to prioritize customer’s requirements related to product by AHP (AnalyticHierarchy Process) and convert them to engineering parameters of TRIZ (Theoryof Inventive Problem Solving) in order to define the inventive principals.Next, based on QFD (Quality Function Deployment), we measured the weight valuesof inventive principals. Finally, as FMEA (Failure Mode and Effect Analysis)can analyze the weight values and reduce the sequential risk, then finalconceptual design was generated. At the end, a medical glasses was used as acase study of innovative design to validate the method and explain how thestrategies of this research for CDP
Decision Support System using Data Mining Method for a Cross Selling Strategy in Retail Stores
Get PDFA sales transaction dataof a retail company which is collect edevery day is enormous. Very large data will bemore meaning fultoin crease the company’s profitsif itcanbe extracted properly. Based on the research resultsof Andhika, et al[1], ZhangandRuan[6], Herera et al [7], Witten [11], explained that one of the methods that can gather information from the transaction data is the method of association. With this method it can be determined the patterns of transactions performed simultaneously and repeatedly. Thus, it can be obtained amodel that can be used as a reference for cross selling sales strategy. The purpose of this research is to apply data mining association methods of data mining by using apriori algorithm to create a new sales strategy for cross selling. Based on calculations, Association Rule is implemented by applying Confidence value=0.8while the value of Support=0.1 of the defined minimum value, the total result are 77 rules.Keywords: Data Mining, Association, Apriori Algorithm, Cross Selling, Retail Store
Technical Challenges of Tower Sharing in Multi-Operator Mobile Communication Environments
Get PDFThe traditional mobile communications business model was based on full ownership of network infrastructure. However, network infrastructure sharing has been a trend among mobile network operators. Sharing traditional mobile network infrastructure which were not designed originally for sharing has become prevalent in the face of stiff competition, regulatory requirement and declining revenues. This, despite the reduction in capital expenditure for operators, brings technical challenges with regards to network planning, optimization and expansion in multi-operator shared environments. This paper briefly introduces models of passive infrastructure sharing and their advantages, and investigates the technical challenges which are inherent to communications tower sharing. The effects of non-optimal antenna height on coverage and signal quality, as well as those of tower loading constraints on transmission link quality are investigated among others. Simulation results and on-site measurements confirm these challenges, which may increase the operation expenditure of mobile networks.Our findings challenge the current perception in both academia and industry that passive infrastructure sharing can only produce positive effects, and therefore call for further investigations on the financial benefits of infrastructure sharing.DOI: http://dx.doi.org/10.11591/ij-ict.v2i3.4553
Modeling Gene Regulation in Graded Hypoxia Using Continuous-Time Markov Chains
Get PDFHypoxia inducible factor (HIF) is the main protein in hypoxia pathway. The response of HIF to changes of oxygen pressure is regulated by 2 oxygen sensors, prolyl hydroxylase (PHD) and factor inhibiting HIF (FIH). Studies have shown that biochemical reactions at molecular level actually exhibit stochastic and random behaviors. Modeling biochemical reactions using purely deterministic method, therefore, ignore these characteristics. Hence, we use stochastic modeling using CTMC to model this regulation. Nevertheless, the use of pure CTMC on complex biochemical reaction networks, such as hypoxia, results in an infeasible computation time and typically requires very large memory. Therefore, we use a numerical hybrid method that combines pure CTMC and deterministic methods. The purpose is to reduce time complexity and to obtain a better accuracy than deterministic method. Using this model, we can observe that an increase of oxygen pressure results in a decrease in the amount of HIF and that oxygen sensor FIH only inhibits C-TAD activity. The model is also able to classify 84% genes that were observedDOI: http://dx.doi.org/10.11591/ij-ict.v2i2.384
Aircraft Landing Scheduling Based on Unavailability of Runway Constraint Through a Time Segment Heuristic Method
Get PDFNoting the problem of increasing airports congestion, it is crucial to obtain a practical and efficient scheduling for departure and landing. The problem of deciding how to land an aircraft on the airport involves assigning each aircraft to an appropriate runway, computing a landing sequence for each runway and scheduling the landing time for each aircraft. The objective was to achieve effective runway use. In this paper, a multiple runway case of the static Aircraft Landing Problem was considered. It was assumed that one of the runways is not available. A mixed integer formulation approach was proposed to deal with the problem. The approach of solving this problem was breaking down the main problem into several sub problems. To validate the model, eight test problems were extracted from the OR-Library and discussions made on their solutions.DOI: http://dx.doi.org/10.11591/ij-ict.v2i3.528
Transformation of Information Technology Based on Human Computer Interaction Concept
Get PDFTransformation technology brings importance consequence to the management system improvement and expansion. In this case exploiting of Information Technology (IT) is hardly required to manage because of it affect to efficiency and effectiveness of the system. The purpose of this paper is to design Integrated Academic Management Information System (IAMIS) with concept of Human Computer Interaction (HCI). The method which be applied is qualitative method by using inductive analysis approach by ignoring initial hypothesis of the research, but to find patterns, forms and themes to expose data systematically. The final result is HCI applied in IAMIS system has been applied, so that found usability and functional system, effective and efficient of AIMIS system are fully be able to carry out well. Furthermore, the analysis results show using IAMIS system affected the staff productivity increasing by 12%, it also means affected in improvement of information services to the academic community. The writer recommended to design system on the concepts of HCI and accommodated is able to online (web-based) system.DOI: http://dx.doi.org/10.11591/ij-ict.v2i3.411
A Trust Management System Through Ambient Communication for VANET
Get PDFIn a VANET, the network topology is constantly changing. In fact, it requires distributed self-organizing security systems. In this article, we propose a distributed self-organizing trust management system for vehicular ad-hoc networks (VANETs), given the disastrous consequences of acting on false information sent by the malicious peers in this context. Our application can verify the correctness of alert messages sent by other vehicles about road accident. We opted to apply ambient communication technology to provide a self-organized network. We introduce the concept of “ambient intelligent vehicle” that consists in integrating ambient intelligence features in VANET. Vehicles are considered as intelligent agents that communicate in an ambient environment. Such vehicles are able to control and to detect false warning based on trust management system depicted in this article. Vehicles are arranged into clusters in order to facilitate communication and to reduce overhead. We model how vehicle operate using UML state diagram.DOI: http://dx.doi.org/10.11591/ij-ict.v2i2.298
Interval-valued Intuitionistic Fuzzy Weighted Entropy in Evaluation of Service Quality
Get PDFThe importance of measuring service quality perceived by customers is an issue since the service quality is a key to success in service oriented industry. The estimation of service quality should be carried out with suitable measurement scales according to the types of service provided. To the best of authors’ knowledge, there have been little discussion about the applications of interval-valued intuitionistic fuzzy sets- based evaluation in measuring service quality. This paper proposes an evaluation for service quality of five vehicle insurance companies using interval-valued intuitionistic fuzzy entropy measure. Linguistic data were collected from customers using a questionnaire. An averaged interval-valued intuitionistic fuzzy number is used to construct decision matrix. Interval-valued intuitionistic fuzzy weighted averaging operator is used to aggregate the interval-valued intuitionistic fuzzy numbers for alternatives. It is found that PCF Insurance was evaluated as the best vehicle insurance company in providing service quality to customersDOI: http://dx.doi.org/10.11591/ij-ict.v2i1.152
Prediction of Future Computers Using Developing Technologies
Get PDFPrevious predictions about future of computers, such as Moore’s law are analyzed, at first. Then developments in basic science such as quantum physics, spintronics, and also developments in technologies such as biology, nanoelectronics, photonics and nanophotonics, communications technologies, and medical engineering that are applicable in computers, are introduced. Then expected future goals are discussed: Reduction of cost and weight, increase of processing speed, increase of intelligence and integration with other systems.DOI: http://dx.doi.org/10.11591/ij-ict.v2i3.472
A Survey on Publish-Subscribe Internet Routing Paradigm
Get PDFCurrent internet is incompetent and inept for the current trends of communication. The architecture of current internet was drafted almost 40 years ago and it is unable to cop up the problems aroused in context of security, mobility, robustness, congested traffic and vice versa of this millennium. In this paper, publish–subscribe internet routing paradigm (PSIRP) a reengineered architecture of internet is comprehensively studied, which will resolve many of the problems faced by the internet today. Keeping in view the importance of information/data, the reengineered architecture of PSIRP proffers the information–centric communication instead of host–centric communication, in response to which many of the problems of current internet will be resolved automatically. As major portion of internet is publish/subscribe in nature so PSIRP can provide a flexible, efficient and powerful architecture for future internet network design.DOI: http://dx.doi.org/10.11591/ij-ict.v2i3.356