• Journal of Technology Innovation
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• v.5 no.1
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• pp.15-43
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• 1997

This paper investigates empirically the relationship between various business portfolio properties (particularly technological properties) and chaebol's performance using data on the 50largest chaebols in Korea. In addition to the traditional indexes to measure diversification such as entropy index, we calculated inter-industry technological similarity using R'||'&'||'D expenditure data by industry and 1990 Input-output Table in korea, and obtained chaebol-level technological relatedness and internal transaction proportion from chaebols' business profile, inter-inustry technological similarity and 1990 input-output table. We applied factor analysis on 13 business portfolio property indexes and showed that they could be grouped into 3 dimensions. diversification scope, inter-business relatedness and degree of vertical integration. In this paper, using 50 largest chaebols' financial data (1989-1994), we analyzed empirically the effect of business portfolio properties on ROS(Return On Sales) which is conventional index for firm performance and on TFP(Total Factor Productivity) growth which is a pure measure of firm performance. To utilize the advantage of panel data, FEM(Fixed Effect Model) and REM(Random Effect Model) were used. The empirical result shows that the entropy index as a measurement of inter-business relatedness in not significant but technological relatedness index is significant. OLS estimates on pooled data were considerably different from FEM or REM estimates on panel data. By introducing interaction effect among the three variables for business portfolio properties, we obtained three findings. First, only VI(Vertical integration) has a significant positive correlation with ROS. Second, when using TFP growth as an dependent variable, both TR(Technological Relatedness) and VI are significant and positively related to the dependent variable. Third, the interaction term between TR and VI is significant and negatively affects TFP growth, meaning that TR and VI are substitutes. These results suggest strategic directions on restructuring business portfolio. As VI is increased, chaebols will get more profit. A higher level of either TR or VI will increase TFP growth rate, but increase in both TR and VI will have a negative effect on TFP growth. To summarize, certain business portfolio properties such as VI and TR can be considered "resources" themselves since they can affect profit rate and productivity growth. VI and TR have a synergy effect of change in profit rate and productivity growth. VI increases ROS and productivity growth, while TR increases productivity growth representing a technological synergy effect.t.

• Journal of KIISE:Software and Applications
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• v.36 no.1
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• pp.62-69
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• 2009

The purpose of document summarization is to provide easy and quick understanding of documents by extracting summarized information from the documents produced by various application programs. In this paper, we propose a document summarization method that creates and analyzes a connection graph representing the similarity of keyword lists of sentences in a document taking into account the mean length(the number of keywords) of sentences of the document. We implemented a system that automatically generate a summary from a document using the proposed method. To evaluate the performance of the method, we used a set of 20 documents associated with their correct summaries and measured the precision, the recall and the F-measure. The experiment results show that the proposed method is more efficient compared with the existing methods.

• Journal of the Korean Society of Clothing and Textiles
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• v.7 no.2
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• pp.45-52
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• 1983

The purpose of this study was to investigate between locus of control, body cathexis and four aspects of clothing behavior. Locus of control was measured by Rotter's The Internal-External Scale and body cathexis by Secord and Jourard's Body Cathexis Scale. Two aspects of clothing behavior were assessed with Lee's questionnaires dealing with status symbol and clothing satisfaction. Clothing Acceptance I was determined with questionnaires designed to measure the acceptance of color and casual wear and Clothing Acceptance II by line drawings of clothing representing formal type, informal type, and new mode type designed to measure the acceptance of business suits. The questionnaires in this study were administered to a sample of men (between 20 to more than 60 years of age) in Seoul. The data from 303 respondents were analyzed. The results were: 1) Locus of control was not related to Clothing Acceptance I(acceptance of color and casual wear), but positively related to Clothing Acceptance II(acceptance of business suit), that is, the persons having wider latitudes of acceptance in business suits were internally controlled in locus of control. 2) Locus of control was negatively related to status symbol, that is, the persons having higher concepts in status symbol were externally controlled in locus of control. 3) Body cathexis was positively related to clothing satisfaction, that is, the persons having higher satisfaction toward their clothing were more satisfied with their body.

• Journal of Biomedical Engineering Research
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• v.16 no.4
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• pp.555-561
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• 1995

In this paper, the O-Ring Measurement System (O-R MS) has been designed to supplement such subectivity and apply to the diagnosis by constitution. A single chip microprocessor of Intel MCS-51 family has been used to control the O-R MS and process data with real time, and the O-R MS could measure the minute muscular strength, expanded width between fingers, and time of the measurement. Therefore the objective constitutional diagnosis is possible by the O-R MS. As a clinical testing for estimating credibility of O-R MS, the acupuncture points representing the constitution has been stimulated using a semiconductor laser stimulator and measure the muscular strength by the O-R MS. The result of clinical testing has been shown that the constitutional diagnosis with the O-R MS is proved highly precision of 96% and it is expected that the O-R MS can be used practically for the objective constitutional diagnosis.

• The Journal of the Acoustical Society of Korea
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• v.15 no.1
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• pp.54-60
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• 1996

In most pattern recognition and image understanding applications, images are degraded by noise and other distortions. Therefore, it is more relevant to decide how similar two objects are rather than to decide whether the two are exactly the same. In this paper, we propose a method for recognizing degraded symbols using a distance measure between two graphs representing the symbols. a symbol is represented as a graph consisting of nodes and edges based on the run graph concept. The graph is then transformed into a reference model graph with production rule containing the embedding transform. The symbols are recognized by using the distance measure which is estimated by using the number of production rules used and the structural homomorphism between a transformed graph and a model graph. the proposed approach is applies to the recognition of non-note musical symbols and the result are given.

• Korean Journal of Child Studies
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• v.9 no.2
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• pp.29-59
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• 1988

Empathy was defined in this study as the vicarious affective response of a person to the perceived experience of another. The purpose of this study was to study the relationship between empathic development of children and intimacy with parents, socio-economic status, and children's empathic response to specific affective situations happy, sad, angry and fearful. The subjects for this study were 8-, 10-, and 12-year-old children attending an elementary school located in Seoul. Among the subjects, 158 boys and 149 girls lived with their parents, and 20 boys and 35 girls were reared in orphanges. They were from a residential area with higher, middle, and lower class families. The instruments consisted of two modified empathy measures and two questionnaires developed by the researcher. One of the empathy measures was based on Feshbach & Roe's affective situation test for empathy. In order to determine the eight themes, 20 children were interviewed individually about situations that made them "happy, sad, angry, and afraid". From the pool of responses, eight themes representing happy, sad, angry and fearful situations were selected. Each story consisted of a series of three pictures accompanying narration. Another modified empathy measure was developed by the researcher based upon Bryant's empathy scale. This measure consisted of 17 statements describing happy, sad, angry and fearful situations. The items in this scale were selected from a pilot study. The two questionnaires developed by the researcher were to test children's intimacy for their parents and feminity. The data was analyzed with T-test and F-test. Children's intimacy with their parents, particularly, son's intimacy with their mothers, was a significant variable in empathic development. Children living with their parents had higher scores on Feshbach & Roe's Empathy Test than those brought up in orphanages. In general, the older the children the higher the empathy score. Girls were more empathic than boys on Bryant's scale. The subjects showed their highest empathy score in the sad, and the lowest in the fearful situation. The older the children the higher the empathy score in the sad and angry situations. These results reflected children's life experiences and cultural differences. Particularly, mother-son intimacy found in this study contrasts with the mother-daughter intimacy found in American studies.

• Phonetics and Speech Sciences
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• v.12 no.4
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• pp.73-80
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• 2020

In this study, a method for measuring the jitter component in continuous speech is presented. In the conventional jitter measurement method, pitch variabilities are commonly measured from the sustained vowels. In the case of continuous speech, such as a spoken sentence, distortion occurs with the existing measurement method owing to the influence of prosody information according to the sentence. Therefore, we propose a method to reduce the pitch fluctuations of prosody information in continuous speech. To remove this pitch fluctuation component, a curve representing the fluctuation is obtained via polynomial interpolation for the pitch track in the analysis interval, and the shift is removed according to the curve. Subsequently, the variability of the pitch frequency is obtained by a method of measuring jitter from the trajectory of the pitch from which the shift is removed. To measure the effects of the proposed method, parameter values before and after the operations are compared using samples from the Kay Pentax MEEI database. The statistical analysis of the experimental results showed that jitter components from the continuous speech can be measured effectively by proposed method and the values are comparable to the parameters of sustained vowel from the same speaker.

• Journal of The Korean Society of Integrative Medicine
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• v.8 no.4
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• pp.125-131
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• 2020

Purpose : Lower extremity orthoses have been used as conservative methods to recover gait of the stroke patients. The purpose of this study is to examine how newly designed pelvic belt orthosis can improve gait ability and dynamic balance of adults with Hemiparesis after stroke. Methods : 22 patients who had hemiparesis after stroke participated in this study. Two groups were randomly created by assigning 10 subjects to the experimental group and the rest of the 12 subjects to the control group. The control group was treated by conventional physical therapy and occupational therapy. Identical therapy protocols were used to treat the experimental group who were assigned to wear the pelvic belt orthosis during post measurement. This study has a group of independent variables including group, gender, age, height, MAS, lesion side, cause and a group of dependent variables including gait speed, cadence, step length, stride length, and dynamic balance. The GAITRite system was used to measure spatial-temporal gain parameters and the balance system SD to measure dynamic balance. The data was analyzed using R version 3.3.1. Random forest, boosting algorithm, and MANOVA test were conducted to determine the effects of independent variables on dependent variables. Results : This study has a group of independent variables including group, gender, age, height, MAS, lesion side, cause and a group of dependent variables including gait speed, cadence, step length, stride length, and dynamic balance. The independent variable "group" has the most important value, which is approximately 25.42 (%IncMSE) representing a value three times greater than the second important predictor "height." Conclusion : As a result of this research, the hypothesis is validated with conclusion that Pelvic Belt orthosis could be effectively used for improving gait ability and balance of the patients with post-stroke hemiparesis.

• International Journal of Computer Science & Network Security
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• v.22 no.8
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• pp.7-14
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• 2022

This study aimed to test the factor structure of the measure of student participation in distance education. The study population consisted of all teachers in public education and faculty members in higher education in the Kingdom of Saudi Arabia by applying it to a sample of bachelor's and graduate students at the college of Education at umm al-Qura University. The (ESE) was applied to a random sample representing the study population consisting of (216) respondents. The results of the study showed that the scale consists of three main factors, with showed a high degree of construct validity through fit indices of the confirmatory factor analysis. The results have shown a gradual consistency of the measure's invariance that reaches the high level of the Measurement Invariance across the gender and study groups variables.

• Wind and Structures
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• v.34 no.2
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• pp.199-213
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• 2022

The current study investigates the dynamic effects in the tornado-structure response of an aeroelastic self-supported lattice transmission tower model tested under laboratory simulated tornado-like vortices. The aeroelastic model is designed for a geometric scale of 1:65 and tested under scaled down tornadoes in the Wind Engineering, Energy and Environment (WindEEE) Research Institute. The simulated tornadoes have a similar length scale of 1:65 compared to the full-scale. An extensive experimental parametric study is conducted by offsetting the stationary tornado center with respect to the aeroelastic model. Such aeroelastic testing of a transmission tower under laboratory tornadoes is not reported in the literature. A multiaxial load cell is mounted underneath the base plate to measure the base shear forces and overturning moments applied to the model in three perpendicular directions. A three-axis accelerometer is mounted at the level of the second cross-arm to measure response accelerations to evaluate the natural frequencies through a free-vibration test. Radial, tangential, and axial velocity components of the tornado wind field are measured using cobra probes. Sensitivity analyses are conducted to assess the variation of the structural dynamic response associated with the location of the tornado relative to the lattice transmission tower. Three different layouts representing the change in the orientation of the tower model relative to the components of the tornado-induced loads are considered. The structural responses of the aeroelastic model in terms of base shear forces, overturning moments, and lateral accelerations are measured. The results are utilized to understand the dynamic response of self-supported transmission towers to the tornado-induced loads.