• International Journal of Contents
• /
• v.8 no.3
• /
• pp.26-33
• /
• 2012

The animal naming test (ANT) is known to be influenced not only by age, gender, and education but only by ethnicity, culture, and language. Thus, population-specific norm considering these variables needs to be developed for Korean-speaking elderly. We evaluated 185 healthy elderly people with five measures. Education was the single statistically independent correlate of the total number of words ($R^2$ = .312, p = .038). After adjusting for education, there was slightly significant negative correlation (r = -.215, p = .049) between age and total number of words. Mean number of words produced was $13.71{\pm}3.09$. The production frequency was negatively correlated with the typicality rating (r = -0.41, p < .05). The concrete and exact scoring rule could be set up in the comparison of naming performance between a normal and patient with neuro-linguistic disorder and its data could be utilized in a differential diagnosis for patients with neurological disorders.

• ETRI Journal
• /
• v.20 no.4
• /
• pp.327-345
• /
• 1998

This paper deals with the problem of one-to-one mapping of 2$^n$ task modules of a parallel program to an n-dimensional hypercube multicomputer so as to minimize the total communication cost during the execution of the task. The problem of finding an optimal mapping has been proven to be NP-complete. First we show that the mapping problem in a hypercube multicomputer can be transformed into the problem of finding a set of maximum cutsets on a given task graph using a graph modification technique. Then we propose a repeated mapping scheme, using an existing graph bipartitioning algorithm, for the effective mapping of task modules onto the processors of a hypercube multicomputer. The repeated mapping scheme is shown to be highly effective on a number of test task graphs; it increasingly outperforms the greedy and recursive mapping algorithms as the number of processors increases. Our repeated mapping scheme is shown to be very effective for regular graphs, such as hypercube-isomorphic or 'almost' isomorphic graphs and meshes; it finds optimal mappings on almost all the regular task graphs considered.

• Korean Journal of Child Studies
• /
• v.31 no.5
• /
• pp.1-15
• /
• 2010

The purpose of study was to investigate internal and external problem behavior according to types of multiple-attachments exhibited to both mothers and teachers. The subjects were 120 preschool children (between 4 to, -5 years old), their mothers and teachers. The attachment classification of these 120 preschoolers was evaluated by an attachment Q-set. Data was statistically analyzed by means of one-way ANOVA, and the Duncan test with the SPSS Win 13.0 program. Our results were as follows, Firstly, significant differences were observed in the internal problem behavior according to types of multiple-attachments. Second, significant differences were also observed in the external problem behavior according to types of multiple-attachments. This study suggests that secure attachment relationships with teachers may compensate for insecure relationships with mothers.

• Journal of Information Processing Systems
• /
• v.12 no.4
• /
• pp.644-660
• /
• 2016

The real-time detection of malware remains an open issue, since most of the existing approaches for malware categorization focus on improving the accuracy rather than the detection time. Therefore, finding a proper balance between these two characteristics is very important, especially for such sensitive systems. In this paper, we present a fast portable executable (PE) malware detection system, which is based on the analysis of the set of Application Programming Interfaces (APIs) called by a program and some technical PE features (TPFs). We used an efficient feature selection method, which first selects the most relevant APIs and TPFs using the chi-square ($KHI^2$) measure, and then the Phi (${\varphi}$) coefficient was used to classify the features in different subsets, based on their relevance. We evaluated our method using different classifiers trained on different combinations of feature subsets. We obtained very satisfying results with more than 98% accuracy. Our system is adequate for real-time detection since it is able to categorize a file (Malware or Benign) in 0.09 seconds.

• Journal of Korean society of Dental Hygiene
• /
• v.13 no.3
• /
• pp.475-480
• /
• 2013

Objectives : The aim of this study was to analyze self-perceived oral malodor symptoms and associated factors among adults in metropolitan area. Methods : This research was based on self-perceived oral malodor symptoms survey in 413 adults from March 5 to May 7, 2012. Data were analyzed with chi-square test, and stepwise multiple regression analysis using SPSS WIN 12.0 program and significance level was set at p<0.05. Results : The prevalence rate of self-perceived oral malodor symptoms was 62.7%. The most influencing factors of self-perceived oral malodor symptoms was age. The other factors were self-perception stress level, exercise, and periodontitis in the order. Conclusions : In order to reduce self-perceived oral malodor symptoms, it is necessary to maintain mental and physical soundness basically.

• Transactions of Materials Processing
• /
• v.9 no.6
• /
• pp.590-597
• /
• 2000

A finite element formulation lot the simulation of axisymmetric sheet hydroforming is proposed, and an implicit program is coded. In order to describe normal anisotropy of steel sheet, Hill's non-quadratic yield function (Hill, 1979) is employed. Frictional contacts among sheet surface, rigid tool surface, and flexible hydrostatic pressure are considered using mesh normal vectors based on finite element of the sheet. Applied hydraulic pressure is also considered as a function of forming rate and time and treated as an external loading. The complete set of the governing relations comprising equilibrium and interfacial equations is approximately linearized for Newton-Raphson algorithm. In order to verify the validity of the developed finite element formulation, the axisymmetric bulge test is simulated. Simulation results are compared with other FEM results and experimental measurements and showed good agreements. In axisymmetric hydroforming processes of a disk cover, formability changes are observed according to the hydraulic pressure curve changes.

• Journal of the Korea Society for Simulation
• /
• v.9 no.3
• /
• pp.91-102
• /
• 2000

The distribution routing problem is one of the important problems in distribution and supply center management. This research is concerned with an integrated distribution routing problem for multi-supply centers based on improved genetic algorithm and GUI-type programming. In this research, we used a three-step approach; in step 1 a sector clustering model is developed to transfer the multi-supply center problem to single supply center problems which are more easy to be solved, in step 2 we developed a vehicle routing model with time and vehicle capacity constraints and in step 3, we developed a GA-TSP model which can improve the vehicle routing schedules by simulation. For the computational purpose, we developed a GUI-type computer program according to the proposed methods and the sample outputs show that the proposed method is very effective on a set of standard test problems, and it could be potentially useful in solving the distribution routing problems in multi-supply center problem.

• Bulletin of the Society of Naval Architects of Korea
• /
• v.27 no.1
• /
• pp.84-98
• /
• 1990

Fifteen(l5) series hull forms for full slow-speed ships were prepared by expanding the basic parent hull form developed through the extensive theoretical and experimental studies, and model tests were carried out for each of the series hull forms. A set of systematic data was prepared from the test results and utilized to derive regression equations for the prediction of resistance and powering characteristics by statistical analysis. Computer program has been prepared based on the results of analysis and a sample run is presented.

• Structural Engineering and Mechanics
• /
• v.35 no.5
• /
• pp.593-616
• /
• 2010

The seismic performance of reinforced concrete (RC) bridge columns is a significant issue because the interaction of flexural ductility and shear capacity of such columns with varied amounts of lateral reinforcement is not well established. Several relationships between flexural ductility and shear capacity have been proposed by various researchers in the past. In this paper, a parametric study on RC bridge columns is conducted using a nonlinear finite element program, "Simulation of Concrete Structures (SCS)", developed at the University of Houston. SCS has been previously used to predict the seismic behavior of such columns. The predicted results were compared with the test results obtained from experiments available in literature. Based on the results of the parametric study performed in this paper, a set of new relationships between flexural ductility and shear capacity of RC columns is proposed for seismic design.

• Journal of Electrical Engineering and Technology
• /
• v.3 no.2
• /
• pp.162-166
• /
• 2008

This paper presents the design and implementation of a 5kW programmable three-phase harmonic generator, which is capable of generating sinusoidal output voltages with adjustable output amplitude and frequency over a wide range as well as arbitrary waveforms. The considered harmonic generator is a linear power amplifier type. This system consists mainly of a power converter to generate and amplify waveform signals, a controller to control the desired output signal and measure the output parameters including voltage and current, and a control program to set the desired output and display the output values. The prototype programmable three-phase harmonic generator has been constructed and tested. Test results show that the developed programmable three-phase harmonic generator performs well.