• Human Ecology Research
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• v.57 no.2
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• pp.295-305
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• 2019

This study examined the effects of social comparison orientation and stress coping styles on job-seeking stress experienced by university students. The participants of this study were 324 junior and senior students (151 males and 173 females) from six universities located in Seoul who were preparing for employment. They were asked to respond to a written questionnaire to measure research variables for the Job-Seeking Stress Scale, the Social Comparison Orientation Scale, and the Ways of Coping Checklist. The data were analyzed by means of descriptive statistics and a hierarchical multiple regression. The major findings of this study were as follows. First, social comparison orientation had a positive effect on job-seeking stress of university students, revealing that students with a high level of social comparison orientation were more likely to experience job-seeking stress. Second, both emotion-alleviation coping style and wishful thinking coping style increased level of job-seeking stress. In addition, problem-focused coping style had a negative influence on job-seeking stress, whereas social support seeking coping style had no significant effect on it. The results suggested that it would be possible to reduce job-seeking stress of university students by changing either social comparison or stress coping style.

• Journal of the Korean Home Economics Association
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• v.40 no.3
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• pp.165-175
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• 2002

The purpose of this study is to compare the attitudes toward money and credit between housewives and female cortege students. Female college students were younger and economically dependent. Female college students(n=131) and housewives(n=96) were surveyed for the study. Results of the study were: 1) Housewives perceive money as a security, Female students did money as the emotional tool and the success. 2) Housewives tended to be more negative to use credit generally and more positive under the certain condition compared with female students. 3) Affective style of money attitudes among female students and cognitive style among housewives were more popular 4) Negative type of credit altitudes were more popular among both groups. 5) Negative type of credit attitudes were more poplar in cognitive style of money altitudes and tolerated type were more popular in affective style.

• Journal of Chest Surgery
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• v.26 no.11
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• pp.871-873
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• 1993

Bronchiectasis is an irreversible dilatation that may require surgery for successful treatment. We compared High Resolutional Computed Tomography[HRCT]with Bronchography to access the utility of HRCT in diagnosis and determining the extent of Bronchiectasis. We performed a comparative study of HRCT and Bronchography in 10 consecutive patients who were clinically suspected Bronchiectasis were investigated prospectively during last year.A segment-by-segment analysis of the presence, extent, type of bronchiectasis by Amashita classification was done. In 26 segments, Results of HRCT and Bronchogram were both positve, and 119 segments were both negative.But 15 segments were discorded, in 11 segments in positive bronchogram were negative in HRCT and 4 segments in positive HRCT were negative in bronchogram. The diagnostic concordance rate between 2 modalities was 90.6%[145/160]. So, we will be tried to elevate of concordance rate between 2 modalties and applied HRCT in diagnotic tool for bronchiectasis.

• 대한예방의학회:학술대회논문집
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• 1994.02b
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• pp.142-149
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• 1994

Substitution of graphic representation for extensive lists of numerical statistical data is highly desirable by both editors and readers of medical journals, faced with an exploding abundance of contemporary medical literature. A novel graphic tool. the 'double-ring diagram', is described herein which permits visual representation of information regarding certain statistical variables used to describe the performance of a test or physical sign in the diagnosis of a disease. The diagram is relatively easy to construct on the basis of a number of primary data such as the prevalence and the true positive, true negative. false positive and false negative test results. These values are reflected in the diagram along with the values of other statistical variables derived from them. such as the sensitivity. specificity, predictive values for positive and negative test result. and accuracy. This diagram may be useful in visualizing a test's performance and facilitating visual comparison of performance of two or more tests.

• International journal of advanced smart convergence
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• v.10 no.4
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• pp.215-224
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• 2021

The purpose of this study is to estimate the factors that affect college students' drinking needs and spending. An analysis model to estimate the determinants affecting drinking needs was applied with a truncated Poisson model and a truncated negative binomial model. Tests to select more appropriate models of the two types were made using the comparison of log-likelihood function and the over-dispersion test. The analysis result was interpreted by applying the truncated negative binomial model as the truncated Poisson model showed over-dispersion. We also applied the Tobit model to analyze the determinantsthat affect college students' expenditure on drinking. According to the analysis, gender, grade, allowance and parental occupation were the factors influencing statistics, and gender, type of household income, and student religion were the factors influencing expenditure.

• International Journal of Aeronautical and Space Sciences
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• v.17 no.4
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• pp.501-517
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• 2016

Synchronized switch damping (SSD) is a structural vibration control technique in which a piezoelectric patch attached to or embedded into the structure is connected to or disconnected from the shunt circuit in order to dissipate the vibration energy of the host structure. The switching process is performed by a digital signal processor (DSP) which detects the displacement extrema and generates a command to operate the switch in synchronous with the structure motion. Recently, autonomous SSD techniques have emerged in which the work of DSP is taken up by a low pass filter, thus making the whole system autonomous or self-powered. The control performance of the previous autonomous SSD techniques heavily relied on the electrical quality factor of the shunt circuit which limited their damping performance. Thus in order to reduce the influence of the electrical quality factor on the damping performance, a new autonomous SSD technique is proposed in this paper in which a negative capacitor is used along with the inductor in the shunt circuit. Only a negative capacitor could also be used instead of inductor but it caused saturation of negative capacitor in the absence of an inductor due to high current generated during the switching process. The presence of inductor in the shunt circuit of negative capacitor limits the amount of current supplied by the negative capacitance, thus improving the damping performance. In order to judge the control performance of proposed autonomous SSDNCI, a comparison is made between the autonomous SSDI, autonomous SSDNC and autonomous SSDNCI techniques for the control of an aluminum cantilever beam subjected to both single mode and multimode excitation. A value of negative capacitance slightly greater than the piezoelectric patch capacitance gave the optimum damping results. Experiment results confirmed the effectiveness of the proposed autonomous SSDNCI technique as compared to the previous techniques. Some limitations and drawbacks of the proposed technique are also discussed.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.22 no.5
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• pp.800-805
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• 2013

Incremental forming of sheet metal is a modern method of forming sheet metal, where parts can be formed without the use of dedicated dies. Existing experimental configurations for incremental forming can be broadly classified into two categories, i.e., negative and positive forming. In this paper, forming qualities such as shape accuracy and surface roughness of Al 1050 material were discussed for different forming methods. The formed and the corresponding opposing surfaces were measured with a three-dimensional scanner and a surface roughness tester. It was found that in terms of shape accuracy, the best opposing surface was obtained with positive forming, whereas the worst formed surface was obtained with negative forming; furthermore, the opposing surface is always better than the formed surface, regardless of the forming method used.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.8
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• pp.1572-1579
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• 2009

In this dissertation ultra-broadband power amplifier(UPA) was designed and fabricated using negative feedback technique. UPA was made of pre-amplifier, drive amplifier and power amplifier. Negative feedback technique was used to achieve ultra-broadband performance. Designed power amplifier has 30dB gain and 2W output power. The load-pull data of power amplifier for optimal power matching was extracted from the measured S-parameter. Fabricated PCB material, permittivity is 4.6 and thickness is 0.8mm, is FR4 and UPA was fabricated 3 modules for comparison of the simulated and measured results. Size of the fabricated pre-amplifier and drive amplifier module is 40mm'50mm'16mm. And from the experimental results, gain of the pre-amplifier module is 9.87dB at 2GHz and flatness is 0.63dB. Experimental result of the drive amplifier module is 10.97dB at 2GHz and flatness of that is 0.26dB. Test result of the power amplifier module is 10.71dB at 2GHz and flatness is 0.72dB. Total size of the power amplifier is 45mm'134mm'16mm. According to the test results, gain of the UPA is 28.98dB at 2GHz and flatness is 1.68dB. Output power was 32.098dBm at 2GHz, 32.154dBm at 1GHz and 31.273dBm at 100MHz.

• Speech Sciences
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• v.8 no.4
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• pp.259-273
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• 2001

This study investigates the accentual realization of negation denying the presupposition of a previous utterance compared with that of a general negation. Specifically we study what types and positions of accent are realized in the speech of Korean speakers using English as a second language as well as English native speakers. Gussenhoven (1983) and Bolinger (1985, 1986) suggested that when presupposition of previous utterances is denied through negation, focal accent is assigned to empty (functional) words, rather than negative morphemes. The results of this study, however, show that negation sentences denying presupposition have accents not only on empty (functional) words but also on content words. Almost every English native speaker places an H* accent on the negative morphemes themselves (not, no, nothing, etc.) in general negation, as well as on the other lexical items-verbs and prepositions in our data-in negations denying presuppositions. On the other hand, Korean speakers hardly distinguish between the two kinds of negation sentences, unlike native speakers through accentual differences. Rather, they give accent an every content word, including the negative morphemes in both general negations and negations denying presuppositions. Therefore, the results of this study do not absolutely support the previous studies on the denial of presupposition.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.7
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• pp.477-489
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• 2021

The purpose of this study is to examine the effects of credit risk on commercial banks' profitability in Afghanistan. Due to the availability of limited data, this study applies the Fixed Effects estimator on balance panel data of six domestic private commercial banks over the period 2014-2018. The study uses LLRTL, TLTA, and TLTD as credit risk indictors, size as bank-specific determinant, ROAA, ROAE, and NIM as profitability indicators. The study finds a robust negative and significant effect of LLRTL on ROAA, and ROAE, but positive and insignificant on NIM. The results also reveal significant positive effect of TLTA on NIM, however insignificant negative on ROAA while insignificant positive on ROAE. The study finds negative effect of TLTD on ROAA, ROAE, and NIM, but only significant on NIM. Further, this study reveals a robust negative and significant effect of size on all profitability indicators. The mean comparison of profitability demonstrates that NIM is in a better situation than others profitability indicators, which is a good sign for the Afghan banking sector. The findings of this study suggest that improving credit management, increasing efficiency of asset management or effectiveness of business model can increase commercial banks' profitability in Afghanistan.