• Journal of Korean Academy of Nursing
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• v.37 no.4
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• pp.510-518
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• 2007

Purpose: This study examined the effects of an insight-oriented nursing program on schizophrenic patients' insight, positive and negative syndromes, and depression. Method: A non-equivalent control group non-synchronized design was utilized. For this research, a total of 34 subjects were selected at a psychiatric hospital in Daegu during the period ranging from Oct. 1st, 2005 to Feb. 11th, 2006 (experimental group=17, control group=17). Result: After the treatment, between the experimental and control groups, there wasa significant difference in the level of SUMD(t=-4.52, p=.000) and positive syndrome(t=6.97, p=.013), but no significant difference in the negative syndrome(t=-1.81, p=.079) and depression(t=2.23, p=.145). Conclusion: The results of this study show that the insight-oriented nursing program works well for schizophrenic patients. Therefore, it is recommended that this program should be used in clinical practice as an effective nursing intervention for schizophrenic patients.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2003.05a
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• pp.120-122
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• 2003

In this study, an experiment was conducted in order to investigate the feasibility and effectiveness of and on-line subjective assessment (OLSA) system. The present study compared Galvanic Skin Response (GSR) with the OLSA by presenting 28 subjects in their 20s with pictures arousing either positive or negative sensibility. According to the correlation coefficients, changes in subjective sensibility caused by the positive visual stimulus were related more closely to GSR, from the positive visual stimulus, and changes in subjective sensibility caused by the negative visual stimulus were related more closely to GSR from the negative visual stimulus. In conclusion, the most remarkable characteristic of the present system is that it not only assesses the average sensibility when stimuli are presented, but also shows the changing strength of sensibility over time.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.524-526
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• 2011

This paper focuses on study on PWM converter control under unbalanced network condition. Voltage unbalance in a three-phase system causes the performance deterioration by producing 120 Hz voltage ripples in the DC link and 120 Hz ripple in reactive power. To eliminate the ripples, both positive and negative sequence currents should be controlled simultaneously. In this paper four PI controllers on synchronous reference frame is implemented to control D and Q currents in both positive and negative sequence. Positive and negative sequence signal extraction is done using delay signal cancellation method. Simulation results show satisfactory performance in suppressing 120 Hz ripples.

• Korean Journal of Human Ecology
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• v.15 no.1
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• pp.17-29
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• 2006

This study investigated the behavior problems of children, both institutionalized and home-reared, depending on their sex, age, and entry to institution. The subjects included 621 children (274 institutionalized, 347 home-reared; 298 boys and 323 girls; 209 preschoolers, 223 first to third graders, 189 fourth to sixth). The data collected were analyzed with t-test, 3-way ANOVA, Scheffe test, and Pearson's correlation. Children's emotionality had two sides: Positive (happiness) and negative (sadness, anger, and fear). Measures of behavior problems included internalization (anxiety, immaturity, withdrawal, physical symptom) and externalization (hyperactivity, aggression). The results of this study indicated that the institutionalized were higher in negative emotionality than their counterparts, whereas the home-reared higher in positive emotionality. The institutionalized children also had higher externalizing problems than the home-reared. Furthermore, children's negative emotionality was positively related to their internalizing and externalizing behavior problems, while their positive emotionality was negatively related to the internalizing behavior problems.

• Bulletin of the Korean Mathematical Society
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• v.45 no.1
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• pp.23-31
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• 2008

In this paper, we investigate nonoscillatory solutions of a class of higher order neutral nonlinear difference equations with positive and negative coefficients $\Delta^m(x(n)+p(n)x(\tau(n)))+f_1(n,x(\sigma_1(n)))-f_2(n,x(\sigma_2(n)))=0,\;n{\geq}n_0$. Some sufficient conditions for the existence of nonoscillatory solutions are obtained.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.9
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• pp.460-466
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• 2002

A reliable fault phase selection algorithm plays a very important role in transmission line protection, Particularly in Extra High Voltage (EHV) networks. The conventional fault phase selection algorithm used the phase difference between positive and negative sequence current excluding load current. But, it is difficult to pick out only fault current since we can not know when a fault occurs and select the fault phase in weak-infeed conditions that dominate zero-sequence current in phase current. The proposed algorithm can select the accurately fault phase using the sum of unit vectors which are calculated by positive-sequence voltage and negative-sequence voltage.

• Journal of the Korean Home Economics Association
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• v.44 no.5 s.219
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• pp.49-58
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• 2006

The purposes of this study were to investigate emotional display rules and intentions of preschool children, any gender differences and the emotional intentions according to levels of understanding of emotional display rules and positive vs. negative situations. The subjects were 58 six-year-old preschoolers who were individually interviewed using 7 hypothetical scenarios that assessed emotional display rules and intentions. The children showed more self-protective intention than other intentions, although there were no gender differences in using emotional display intentions. Children with high scores of emotional display rules frequently tended to use prosocial and self-protective intentions and also used different emotional intentions on positive vs. negative emotional situations.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1258-1261
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• 2005

The ramp type bias voltage applied to the common electrode during a reset-period is newly proposed to lower the background luminance and to improve the address discharge characteristics in AC-PDP. The positive ramp bias voltage is applied during the ramp-up period, whereas the negative ramp bias voltage is applied during the ramp-down period. The effects of the voltage slopes in both the positive and negative ramp bias voltages on the background luminance and address voltage characteristics are examined intensively. It is observed that the optimized positive and negative ramp bias voltages applied to the common electrode during the ramp-period can lower the background luminance and also enhance the address discharge characteristics of the AC-PDP.

• Korean Journal of Head & Neck Oncology
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• v.8 no.2
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• pp.97-105
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• 1992

One hundred and thirty-nine thyroid nodules were evaluated by aspiration biopsy cytology (ABC) and were compared with the postoperative histologic diagnosis during the period from May 1, 1986 through Aug. 31, 1992. The correlation betwen the two diagnoses proved to be comparable with a low incidence of false-negative diagnoses, but with a relatively high incidence of false-positive ones. The sensitivity was 93.5%, specificity 89.6%, false-negative rate 6.5%, false-positive rate 10.4%, positive predictability 87.9%, negative predictability 94.5%, and overall diagnostic accuracy 91.4%.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.32 no.5
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• pp.157-163
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• 1983

Positive and negative coronas in point-to-plane short gap have been investigated with the variations of point radius and gap length. Mainly the onset potentials and current pulses under various conditions were measured with a 70 MHz C.R.O. and a precise-controllable D.C. power supply. In the case of negative corona, the Trichel pulse corona, glow corona and spark regions were distinguished apparently and the critical gap lengths between them were also found clearly. In the case of positive corona, there are streamer corona, spark regions and the critical gap length between them, too. The current pulse forms of Trichel pulse corona of negative and streamer pulse corona of positive are similar in rising time, peak-to-peak time and pulse width. The glow corona current shows D.C. component in form.