• Parasites, Hosts and Diseases
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• 제50권2호
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• pp.157-159
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• 2012

The aim of this study was to assess the usefulness of PCR for diagnosis of Trichomonas vaginalis infection among male patients with chronic recurrent prostatitis and urethritis. Between June 2001 and December 2003, a total of 33 patients visited the Department of Urology, Hanyang University Guri Hospital and were examined for T. vaginalis infection by PCR and culture in TYM medium. For the PCR, we used primers based on a repetitive sequence cloned from T. vaginalis (TV-E650). Voided bladder urine (VB1 and VB3) was sampled from 33 men with symptoms of lower urinary tract infection (urethral charge, residual urine sensation, and frequency). Culture failed to detect any T. vaginalis infection whereas PCR identified 7 cases of trichomoniasis (21.2%). Five of the 7 cases had been diagnosed with prostatitis and 2 with urethritis. PCR for the 5 prostatitis cases yielded a positive 330 bp band from bothVB1 and VB3, whereas positive results were only obtained from VB1 for the 2 urethritis patients. We showed that the PCR method could detect T. vaginalis when there was only 1 T. vaginalis cell per PCR mixture. Our results strongly support the usefulness of PCR on urine samples for detecting T. vaginalis in chronic prostatitis and urethritis patients.

• 한국식품조리과학회지
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• 제28권1호
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• pp.57-66
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• 2012

This study was carried out to investigate the effect of nutritional knowledge on food habits of male employees in Korea. A questionnaire was developed and distributed to 265 male employees of Seoul and Kyunggi area in Korea. The data were analyzed by t-test and ANOVA using SPSS (ver 12.0). Regarding the general aspects of subjects, the highest percent of ages were between the age 21-30 year old. Most respondents were graduates from a university. About twenty percent of male employees' average income was 1-2 million won per month. Most of their families were nuclear families. Eighty three percent of the respondents did not experience any education on nutrition and obtained food and nutritional information from television and internet. The respondents had a high level of perceived knowledge (86.2%); yet, the accuracy of knowledge was lower than the perceived knowledge (72.31%). Regarding the nutritional knowledge, single groups showed a lower score than married groups and groups living with family. Higher nutritional knowledge correlated with higher educational levels, among man in their twenties and thirties. With regards to their eating habits, the frequency of food intake within a weekly period was significantly different; a large percentage of respondents had high frequencies of instant food, alcohol consumption, and smoking. The higher scores regarding dietary habits were for age groups ranging from 41-60 year old, married individuals, nuclear family groups and educational groups with university degrees. Based on the results of this study, male employees have problem concerning food habits in that they are unbalanced and have a tendency to skip meals. Therefore, for the improvement of nutritional status and eating behavior of male employees, the importance of nutrition needs to be emphasized with proper nutritional education programs.

• 한국전자파학회논문지
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• 제28권10호
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• pp.794-801
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• 2017

본 논문에서는 DTV(Digital Television) 기반의 수동형 레이다와 다중 채널 융합 기법을 이용한 항공기 표적 인식 방법을 제안하였다. DTV에서 송신되는 다수의 채널을 융합하여 표적인식에 필요한 해상도의 HRRP(High Resolution Range Profile)를 획득하였다. HRRP는 AR(Auto Regressive) 기법 또는 제로 패딩 기법을 이용하여 획득하였다. 획득한 HRRP로부터, 경사하강법을 이용한 CLEAN 기법을 통해 산란점을 추출한 후 특성벡터를 생성하였으며, 이를 신경망 구분기에 학습시켜 표적 인식을 수행하였다. 제안된 방법의 성능을 검증하기 위하여 실제 국내에서 운용되고 있는 3개의 송신소(관악산, 용문산, 견월악)의 주파수 대역을 가정하고, 4종의 항공기 실스케일 3D 캐드 모델을 이용하여 제안된 방법과 각 송신소의 단일 채널 주파수를 이용하였을 때의 표적인식 성능을 비교하였다. 시뮬레이션 결과, 제안된 방법이 3개의 송신소 모두에서 각 송신소의 단일 채널 주파수를 이용하였을 때보다 높은 표적 인식 성능을 보였다.

• 유통과학연구
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• 제17권5호
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• pp.95-102
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• 2019

Purpose - The purpose of the research is to identify the demographic characteristics of the customers with high private label purchase intention. According to the previous research demographics such as gender, age, income, and residence type affect private label purchase intention indirectly through psychographics rather than directly. For instance, higher income group is time pressured, price-insensitive, quality-sensitive, less likely to enjoy shopping utilitarian products, and less likely to be variety-seeking. The main contribution of this research is to verify the results found in the previous empirical foreign research using scanner data and to investigate the differences of the characteristics of private label users between Korea and the foreign countries. Research design, data, and methodology - In order to empirically test the proposed hypotheses, scanner data of a Korean major super center was analyzed. Results - Empirical results show that private labels are more favored by old people over 50s, dwellers in individual house, lower income group, and frequent store visitors. Age of 30s, dwellers in the apartment of 30 pyung, higher income group, and consumers who purchased a large amount are less likely to purchase private labels. Gender turned out not to affect private label purchase. It should be noted that there is a significant multicollinearity among independent variables. Conclusions - The research findings provide managerial implication for retailers' private label strategy. In general, retailers heavily send private label coupons to the customers with high purchase volume. According to the research, however, store visit frequency is much more positively associated with private label purchase than purchase amount. The study has some limitations. The samples are only consumers with private label purchase experience. The data were drawn from one store and only 8 commodity products were used for the analysis. Also, if more demographics were available, a more complete description on the private brand users' profile could have been derived. We propose the following future research. Research using the data including consumers without private label experience, research investigating direction of causality between private label loyalty and store loyalty, and research using hedonic private label products such as TV and PC could be promising.

• 전력전자학회논문지
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• 제13권6호
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• pp.453-460
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• 2008

본 논문은 중용량에 적합한 새로운 이중출력 LLC 공진형 DC/DC 컨버터에 관한 것으로써, 별도의 Post-regulator및 추가되는 제어 IC 없이 정밀한 이중출력이 가능한 새로운 방식의 컨버터를 제안한다. 제안된 컨버터의 제어방식은 펄스폭 변조(PWM)와 동시에 주파수 변조(PFM)를 통해 이루어지며 Master 와 Slave 출력을 각각 주파수, 듀티로 제어함으로써 Slave 출력을 위한 별도의 Post-Regulator 및 제어 IC가 필요 없기 때문에, 저가의 컨버터 구현이 가능하다. 또한 기존 LLC 공진형 DC/DC 컨버터와 같이 스위칭 소자의 영전압 스위칭이 보장되는 동시에, Post-Regulator 로 인한 손실이 없기 때문에 효율 및 발열 특성이 매우 우수하다. 본 논문에서는 제안된 컨버터의 우수성과 신뢰성 검증을 위해, 실제로 50" FHD급 PDP용 전원회로를 위한 시뮬레이션 검토 및 시작품을 제작하고 이를 이용한 실험결과를 바탕으로 제안된 컨버터의 타당성을 검증한다.

• 한국콘텐츠학회논문지
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• 제9권3호
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• pp.91-98
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• 2009

복잡하고 빠르게 돌아가는 현대사회의 사회적 대상관계의 특징은 개인주의 팽배와 획일적 인간 관계속의 주체성 상실 등을 들 수 있다. 이러한 구조상의 무관심속에 아동들은 혼자서 텔레비전을 보거나 컴퓨터에 빠져 지내는 경우가 늘어나고 있다. 또한 어머니들의 과보호, 불규칙적인 양육태도, 정서적 외상 및 유전적 영향으로 인해 아동기 정신 발달 장애 빈도가 높아지고 있는 추세이다. 이러한 추세에 발맞추어서 미술치료에 대한 연구와 사례들이 많이 발표되고 있으며 미술치료의 중요성이 대두되고 있다. 이에 본 연구에서는 가장 인간과 밀접한 관계가 있는 자연 매체인 점토를 통한 치료가 발달 장애(자폐아)를 가지고 있는 아동에게 미치는 영향과 효과에 대하여 고찰해보고 또한 점토치료가 이러한 장애를 가진 아동들의 사회적 대상관계와 정화작용의 발전에 미치는 영향에 대해 제시하며 이를 바탕으로 생기는 시너지 (Synergy Effect) 효과와 이러한 효과를 극대화 시킬 수 있는 교육 프로그램 개발 연구에 대해서 제시하려한다.

• 한국학교보건학회지
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• 제25권1호
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• pp.133-142
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• 2012

Purpose: The purpose of this study is to identify the effects of suicide reports by mass media and social support on suicide ideation for college students. Methods: Participants are 350 undergraduate students in one university. This study uses three questionnaires: Perception and Attitude toward Suicide Reports, Social Support, and Suicidal Ideation. The SPSS/WIN 12.0 program is used to analyze the data. In particular, the participants' biographical data are analyzed into frequency and percentage. The degrees of suicide reports, social support, and suicide ideation are calculated into Mean and SD. Moreover, the suicide ideation by suicide report and social support are analyzed by the two-way analysis of variance (ANOVA). Results: This study reveals that college students have an average of 30 minutes to one hour news time a day (38.9%) and have at least one suicide report in a month (30.3%). 79.7% participants believe that the suicide report of mass media results in the cause of the copycat suicide. In terms of suicide report and suicide ideation, the types of mass media (F (4,340)=2.41, p<.05) and suicidal urge (F (1,340)=31.23, p<.01), respectively, have significant influences on suicide ideation. On the other hand, the social support and suicide ideation, whether college students have their mentors (F (1,328)=13.26, p<.001) and/or careres (F (1,328)=26.84, p<.001) have significant influences on suicide ideation. Conclusion: College students have higher suicide ideation at news by internet site rather than by radio, TV, and so on. Moreover, college students who have a suicide feeling in the last one year, have more suicide ideation than who have not. On the other hand, college students who have a mentor and carer tend to have less suicide ideation.

• 대한통합의학회지
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• 제4권2호
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• pp.109-120
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• 2016

Purpose : This study surveyed the relationship between the dietetic behaviors of high school students and nutrition information available from mass media thereby suggesting the way of improving the dietetic health promotion of adolescents. Method : This study surveyed coeducational high school students in S region. 220 questionnaires have been collected and analyzed, which is statistically significant as in other previous studies. The survey lasted for one month, March 14 through April 14 in 2016. The statistical analysis was performed by using the windows version 21.0 of SPSS. Primarily, the frequency analysis and descriptive statistics was carried out on the general information, the usage and confidence of mass media, and the diabetic behaviors of respondents. t-Test and One-way ANOVA were adopted to clarity the mass media usage and diabetic behaviors of respondents for general characteristics. Result : The statistical analysis on the diet usage of mass media among high school students shows that famous restaurants(Response rate 51%) and diet control(20%) are highly evaluated, but disease prevention(15%) is low. Regarding the dietetic information acquisition, the mass media including TV, radio, and Internet appear as main information carriages (p<.001). The confidence in mass media are analyzed in the relation with 10 dietetic behaviors, and 4 items(meal amount: p<.011, vegetable intake: p<.005, protein intake: p<.003) are inversely related to the mass media, which means regular intake party is less dependent of the exterior information. The seaweed(p<.017) intake is statistically significant in confidence level. Conclusion : To increase the interest and the health promotion of students, the dietetic information need to be offered in mass media and education course.

• 동아시아식생활학회지
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• 제23권2호
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• pp.153-170
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• 2013

This study examined awareness and information acquisition behavior regarding food hygiene and safety of university students to improve safe dietary practices and to get basic information to develop educational materials for food safety. It was conducted among 276 university students of Qingdao University and Liaocheng University in Shandong province, China through a self-administered questionnaire. Data were analyzed by SPSS Windows V.19.0. To describe characteristics of the respondents, frequency distributions were used. In addition, t test, one-way analysis of variance and Duncan's multiple range tests were conducted. The results were as follows: The respondents were generally interested in food hygiene and safety. However, the level of awareness regarding the food hygiene and safety system in China was not high. Almost forty-five percent of the respondents did not think that foods produced and distributed in China were safe. For the reasons for their distrust, most of the students replied that they did not trust the safety 'because of distrust for hygiene of the food process', followed by 'because of distrust for food distribution' and 'because of excess or illegal use of food additives on food process'. The respondents answered for the concern level toward food hygiene and safety foodborne disease threatened food safety the most, followed by heavy metal contamination and endocrine disruptors. The respondents acquired most information from electronic media including TV and radio. Most of the students wanted to participate in food hygiene and safety education. Finally, when they found hazardous or foreign materials in food the most frequent reaction was 'paying attention in the next purchase', followed by 'notifying others', and 'letting it go this time but never buying that product in the future'.

• Journal of electromagnetic engineering and science
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• 제11권3호
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• pp.166-173
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• 2011

In this paper, we implemented and analyzed a wireless power transfer (WPT) system with a CSPR topology. CSPR refers to constant current source, series resonance circuit topology of a transmitting coil, parallel resonance circuit topology of a receiving coil, and pure resistive loading. The transmitting coil is coupled by a magnetic field to the receiving coil without wire. Although the electromotive force (emf) is small (about 4.5V), the voltage on load resistor is 148V, because a parallel resonance scheme was adopted for the receiving coil. The implemented WPT system is designed to be able to transfer up to 1 kW power and can operate a LED TV. Before the implementation, the EMF reduction mechanism based on the use of ferrite and a metal shield box was confirmed by an EM simulation and we found that the EMF can be suppressed dramatically by using this shield. The operating frequency of the implemented WPT system is 30.7kHz and the air gap between two coils is 150mm. The power transferred to the load resistor is 147W and the real power transfer efficiency is 66.4 %.