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Wavelet-based Feature Extraction Algorithm for an Iris Recognition System
Panganiban, Ayra,Linsangan, Noel,Caluyo, Felicito Korea Information Processing Society 2011 Journal of information processing systems Vol.7 No.3
The success of iris recognition depends mainly on two factors: image acquisition and an iris recognition algorithm. In this study, we present a system that considers both factors and focuses on the latter. The proposed algorithm aims to find out the most efficient wavelet family and its coefficients for encoding the iris template of the experiment samples. The algorithm implemented in software performs segmentation, normalization, feature encoding, data storage, and matching. By using the Haar and Biorthogonal wavelet families at various levels feature encoding is performed by decomposing the normalized iris image. The vertical coefficient is encoded into the iris template and is stored in the database. The performance of the system is evaluated by using the number of degrees of freedom, False Reject Rate (FRR), False Accept Rate (FAR), and Equal Error Rate (EER) and the metrics show that the proposed algorithm can be employed for an iris recognition system.
Panganiban, G.G.F.,Culaste, G.Y.,Gusi, H.J.M. 한국무역학회 2019 한국무역학회 국제학술대회 Vol.2019 No.08
Amidst trade liberalization, regulations on plant health or sanitary and phytosanitary measures (SPS measures) has been viewed as a burden for both governments and private sector to comply with. The Philippines’ Department of Agriculture, through the Bureau of Plant Industry, has made strides in facilitating trade while protecting plant health. This paper uses the ICT4D framework to describe the different factors in the implementation of e-government, specifically the Sanitary and Phytosanitary Import Clearance in the Bureau of Plant Industry. It considers the inputs such as leadership, innovation and collaboration to counter the conventional lack of resources and physical capital faced by government to produce concrete mechanisms which contributed to the protection of plant health and trade facilitation.
Weight Reduction of Boom System of an Aerial Lift Truck Using the Taguchi Method
Henry Panganiban,Hae-Rim Lee(이해림),Yong Hong(홍룡),Gang-Won Jang(장강원),Tae-Jin Chung(정태진) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Weight reduction by optimizing the design of the boom system for the aerial platform truck is performed using the Taguchi method. Matrix experiments were performed using the constructed orthogonal array of design parameters or factors with a maximum of three settings or levels for each factor. The factors considered are the overlap length between booms, crosssection shape and plate thicknesses. Experiments were carried out with parametric analysis setup in ANSYS Workbench while the optimization is done in Minitab. The CAE-based optimization method enables concept design and verification to be performed over a short period of time. The optimal design has reduced the weight of the boom system by over 10% with structural performance close to the original design.
Topology Optimization of Support Structure for Long-Range Boom Lift
Henry Panganiban,Woncheol Kim,Tae-Jin Chung 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Structural design of long-range telescopic boom system used for lifting work platform requires serious consideration of structural integrity and reliability. Component design can be rapidly and economically conceptualized using CAE tools. In this work, the concept design of support structure for a long-range telescopic boom lift is obtained using topology optimization method. The classical topology optimization formulation is implemented with consideration on various load cases encompassing actual operation conditions. Transfer mechanism of loads from the work platform and boom self-weight into the support structure is analyzed and verified by FEM. In the analytical solution, boom self-weight is defined by its magnitude and location in space while bar or truss elements are used to model the boom structure with the corresponding point loads. Agreement of the calculated reaction forces is very close. The support structure is isolated with the reaction forces imposed on predefined loading points of the structure and topology optimization is carried out. This method can significantly reduce FE-model size and consequently computation time allowing more opportunities to explore possible design configurations within the capability of the topology optimization tool being used. The topology or material layout of the support structure at the converged iteration will be translated into manufacturable final design using a CAD tool.
THICKNESS OPTIMIZATION OF AN AUTOMOBILE BODY FOR NATURAL FREQUENCY MAXIMIZATION
Henry Panganiban,Gang-Won Jang,Tae-Jin Chung,Young-Min Choi 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The paper presents design optimization of an automobile body for dynamic stiffness improvement. The thicknesses of plates making-up the monocoque body of an automobile were employed as design variables for optimization and the objective was to increase the first torsional and bending natural frequencies. By allotting one design variable to each plate of the body, compared to previous works based on element-wise design variables, design space of optimization was reduced to a large extent and numerical instabilities such as checkerboard pattern was efficiently evaded. The method resulted to a considerable amount of increase in the automobile body’s torsional and bending natural frequencies. Considering manufacturability of the optimized result, the converged values of plate thicknesses were approximated to commercially-available values by appropriately reflecting their design sensitivities.
Recent Development in Non-Contact NDE Using Electromagnetic Acoustic Transducer (EMAT) Technology
Henry Panganiban,Tae Jin Chung,Gang Won Jang 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.9
EMATS is the commonly used non-contact inspection and monitoring technology for non-destructive evaluation especially in industrial applications. Various developments and technology have emerged so fast. Some of these developments are electromagnetic ultrasonic 3D modeling with FEM, phase array operation of EMATS, and the tests for the possibility to use dispersive Shear Horizontal modes for NOT. In this paper, some of the emerging technology and recent advances in non-contact NDE using EMATS were pointed out.
Optimization of flatbed trailer frame using the ground beam structure approach
Henry P. Panganiban,Tae-Jin Chung,장강원 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.5
An alternative lightweight flatbed trailer design is achieved through a multi-stage optimization procedure. Topology optimization is used to obtain the optimal layout of flatbed trailer frame beams that provide minimum compliance when subjected to bending loads and exhibits maximum torsional natural frequency. The ground structure approach is used to define the trailer frame layout by generating numerous beams connected to predefined points in the trailer. Topology optimization is formulated as a multi-objective problem subject to a mass constraint. Responses and sensitivities are evaluated using ANSYS, and the optimization problem is solved using the moving asymptotes method. The thicknesses, widths, and heights of the C-channel beams are optimized for further weight reduction while at least maintaining the structural performances of the original design. Size and shape optimizations are performed using OptiStruct. The new optimal design is approximately 13% (275 kg) lighter than and as stiff as the original design for bending loads. However, the former has 3.5 times higher torsional natural frequency than the latter. Moreover, the new optimal design has positive manufacturability because the channel beams will be made out of commercially available sheet metals. The same fabrication technology as for a conventional flatbed trailer is possibly to be used.