Proceeding of the Electrical Engineering Computer Science and Informatics
Not a member yet
649 research outputs found
Sort by
Maximum Power Point Tracking in PV Arrays with High Gain DC-DC Boost Converter
Get PDFPhotovoltaic (PV) system is an electricalgenerator that has been widely used. Ease of implementation,supported by a large number of potentials and needs of GreenEnergy, has become a factor in the increasing number andquickly applied to PV arrays. However, PV arrays haveconstrained related to generator conversion efficiency and theamount of power produced due to inconstant irradiation andtemperature. This problem can be solved by a MaximumPower Point Tracking (MPPT) approach. This article discussesthe MPPT technique with High Gain DC-DC Boost Converterusing the Perturb and Observe (P&O) algorithm. The sameP&O algorithm is also tested in the conventional converter toshow performance and superiority of each converter. Theresults obtained show the advantages and disadvantages ofeach converter used in MPPT by P&O algorithm
Spatial Diversity Impact in Mobile Quantisation Mapping for Cognitive Radio Networks
Get PDFMobile environment especially spatial diversity in spectrum exchange information in cognitive radio networks is an interesting topic for further investigation. Most of the cognitive radio researchers does not consider the spatial diversity of sensing nodes. However, the mobility of the SNs within PU’s coverage area is heavily influencing the detection performance on local observation of energy signals. The movement of the SNs creates spatial diversity in the observation of the PU’s signal. Due to the movement, spatial distance, velocity, Doppler Effect and geo-location information, the signals condition would fluctuate during the sensing process. Spatial diversity also reduces the average received signal strength and must be compensated by detection signal method which appropriate with the signal conditions. Therefore, it is need to find a comprehensive solution to overcome the effects of spatial diversity. Moreover, this research could give a clearly analysis in spectrum exchange information regarding detection performance for cognitive radio networks. Finally, the cooperation overhead due to spatial diversity effects in master node station could reduce and increased the detection performance of PU’s spectrum hole channels
Implementation of Image Segmentation Techniques to Detect MRI Glioma Tumour
Get PDFImage identification to detect a tumour needs several stages of image processing along with identifying analysis. To get an accurate segmentation of the tumour contour and to identify brain tumour based on brain magnetic resonance imaging (MRI), a suitable techniques and stages of image processing are required to be applied. One technique of mid-level image processing became an objective this work. The objective of the study is to segment the boundary of tumour by applying the Modification of Region Fitting (MRF) method in term of data fitting. The performance of the Region Scalable Fitting (RSF) method and Modified Region Scalable Fitting (MRSF) is evaluated by comparing the number of iterations. As the result, the MRF method has successfully segmented the initial region of braintumour images
A Conceptual Framework of Cloud-Based Mobile-Retail Application for Textile Cyberpreneurs
Get PDFCloud-based m-retail application is commonly used by internet retailers and cyberpreneurs for conducting online business operations. The emergence of third-party e-commerce platforms along with incentives from Malaysian government has easily enabled the utilization of mobile marketplace app among both Malaysian sellers and customers. As m-retail has just started to gain attention in Malaysia, more works must be done to overcome the academic research limitations in terms of technological and non-technological perspectives. Meanwhile, textile and apparel products are among the most popular to be sold via the internet in addition to the growing number of related businesses. The uses of latest technology such as cloud-based mobile-retail application may help business owners to sustain for business survival. In designing a mobile applications for specific users, a thorough investigation must be performed. A conceptual framework of the apps might be helpful in providing a general overview of required elements for developing a successful mobile-retail applications. Extensive literature reviews, qualitative analysis, interviews and questionnaires have been conducted in designing and validating the proposed framework. The analysis results shows mean values from the survey are > 3.5 for the core element variables in this research. Thus, the statistical analysis validation results indicates the importance of the element as the fundamental component for the proposed framework. Therefore, this paper intends to propose a conceptual framework of cloud-based mobile-retail application specifically to be used by textile cyberpreneurs which might be helpful for related key players
A New Algorithm for Designing the Parameter of Damped-Type Double Tuned Filter
Get PDFDue to harmonics problems generated by converter devices. Currently, passive filter has been widely used in suppressing harmonics distortion. Passive filter which mostly used is double tuned filter. However, double tuned filter doesn't have a damping resistor which can prevent network elements from exposing to harsh condition such as when the system reactance and the filter impedance are conjugated, this condition can cause severe overvoltage harmonics on the filter and other power system components. There is a new configuration of double tuned filter that has damping resistor, called damped-type double tuned filter. Aiming at the question of parameter of damped-type double tuned filter, a new algorithm for designing the parameter of damped-type double tuned filter is proposed based on the relationship between impedance of two single tuned filter and one double tuned filter, and also based on the resonance at tuned frequency one and tuned frequency two are close to zero. Simulation result from MATLAB shows that the impedance of damped-type double tuned filter designed with this algorithm is appropriate. In addition, the simulation result from PSIM shows that damped-type double tuned filter designed with this algorithm works well
Comparative Analysis of Forensic Software on Android-based Blackberry Messenger using NIJ Framework
Get PDFInstant Messaging application is the most widely used application all over the world. Blackberry Messenger is a multiplatform instant messaging with lots of features that can be a magnet for many people to use Blackberry Messenger for commiting digital crimes. In the process of investigating digital crime cases, digital evidences are required. To obtain digital evidence, a set of forensic tools are needed to conduct forensic process on physical evidences. The topic of this research is to describe the forensic process and to compare the current forensic tools used based on acquired digital evidences by using method that refers to mobile device forensic guidelines made by the National Institute of Justice (NIJ). The forensic tools used in this research are Magnet AXIOM, Belkasoft Evidence Center, and MOBILedit Forensic Express. The outcome shows that Magnet AXIOM has the highest capability to obtain digital evidences, Belkasoft Evidence Center has superiority in terms of data text acquisition, and MOBILedit Forensic Express has superiority in physical evidence preserving and cloning
Arm Robot Manipulator Design and Control for Trajectory Tracking; a Review
Get PDFArm robot manipulator heavily applied in industries ranging from welding, pick-and-place, assembly, packaging, labeling, etc. Trajectory planning and tracking is the fundamental design of an arm robot manipulator. The trajectory is set and determined to satisfy a certain criterion effectively and optimally. Optimization of robot trajectory is necessary to ensure the good quality product and to save energy, and this optimization can be provided by the right modeling and design. This paper presents a review study of arm-robot manipulator design and control for trajectory tracking by investigating the modeling of an arm robot manipulator starting from kinematics, dynamics and the application of the more advanced methods. The idea of this paper comes from the popularity of inverse kinematics among students
A Review of Solar Tracker Control Strategies
No full textThe efficiency of solar panels is an interesting study now, due to the limitation of material capabilities used in the manufacture of solar panels. The increasing of the received radiation intensity from the sun is a way to improve the performance of solar panels. In this paper will be exposed increased efficiency of solar panels using the method of tracking the sun. The commonly used sunlight tracking is an active tracker, due to significant efficiency improvements compared to passive trackers. The active tracker consists of a single axis and a double axis, both of which use a motor as a driver. This motor is controlled using a microcontroller or a programmable logic controller (PLC). Furthermore, the automatic tracker based on microcontroller or programmable logic controller (PLC) on single axis or double axis which is implemented and can be tested in real time or periodically
Measurement of IS/IT Investment on the Implementation of ERP and the Effect on company productivity
Get PDFInformation technology can not be denied in daily activities and is the source of life of some business processes that cause companies to compete in making IT investments. Noted that IT investment increased significantly. However, the data also indicated this investment is not always followed by the achievement of organizational performance. This is known as IT Productivity Paradox, where the benefits obtained do not match what is invested. This phenomenon has long been discussed to this day. IT Productivity Paradox has become an interesting topic in some circles because some findings find different results. Some research proves that investment in IT / IS has driven the performance of the company, while not at other companies. This study aims to determine the phenomenon of IT productivity. The object of research is an organization that has invested and developed ERP system for the last 2 years. The analysis using Information Economics method. The result of investment measurement from this research shows that the application of ERP using Economic Information method in the period of about 2 years shows total project score (64,6) with predicate of influential project. The total score of the project is derived from three aspects of benefits, namely the real aspect, the quasi-real aspect, and the intangible aspect
Winter Exponential Smoothing: Sales Forecasting on Purnama Jati Souvenirs Center
Get PDFForecasting is the process of making predictions of the future based on past and present data and most commonly by analysis of trends. In sales area, an accurate sales forecasting system will help the company to improve the customers' satisfaction, reduce destruction of products, increase sales revenue and make production plan efficiently. Purnama Jati is a typical Jember souvenir place like "prol tape", "pia tape", "brownies tape" and so forth. Every day, sales on every outlet is uncertain so Purnama Jati repeatedly send to the outlets if the stock has run out. This research will focuse on "prol tape" cake, "pia tape" cake product as the research object. In this research we will use winter exponential smoothing as a forecasting method due to suitable character with the case