• 전기전자학회논문지
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• 제15권2호
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• pp.129-133
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• 2011

A spread spectrum clock generation is an efficient way to reduce electro-magnetic interference (EMI) radiation in modern mixed signal chip systems. The proposed circuit generates the spread spectrum clock by directly injecting the modulation voltage into the voltage-controlled oscillator (VCO) current source for SATA II. The resulting 33KHz modulation profile has a Hersey-Kiss shape with a rounded peak. The chip has been fabricated using $0.18{\mu}m$ CMOS process and test results show that the proposed circuit achieves 0.509% (5090ppm) down spreading at 1.5GHz and peak power reduction of 10dB. The active chip area is 0.36mm ${\times}$ 0.49mm and the chip consumes 30mW power at 1.5GHz.

• 한국운동역학회지
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• 제33권3호
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• pp.101-109
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• 2023

Objective: The aim of this study is to verify the differences in muscle characteristics of elite level swimmers before and after a 2-hour practice session. Method: The study was conducted on 15 elite swimmers. Preliminary measurements for each muscle (Anterior Deltoid, Triceps Brachii, Biceps Brachii, Flexor Carpi Ulnaris) were taken using the MyotonPRO device before training. After approximately 2 hours of training, the same muscle areas were measured again. The collected data was analyzed through descriptive statistics and two-way 2×2 RG·RM ANOVA, and all statistical significance levels were set at α=.05. Results: After analyzing the characteristics of the Flexor Carpi Ulnaris (FCU) before and after training in both proficiency level swimmers (excellent, non-excellent), it was found that the interaction effect of group X repetition in muscle tension (F), muscle stiffness (S), and body recovery time (R) was statistically significant. Secondly, in the analysis of the Biceps Brachii (BB), the main effect of repetition in muscle tension (F), muscle stiffness (S), and body recovery time (R) was statistically significant. Furthermore, the interaction effect of group X repetition in muscle stiffness (S) and body recovery time (R) was statistically significant. Conclusion: The efficient use of FCU and BB suggests that it is an important factor distinguishing the performance of excellent and non-excellent swimmers in swimming. Therefore, if we develop and apply measures to efficiently utilize FCU and BB during training, it can help improve the performance of the athletes.

• 한국발생생물학회지:발생과생식
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• 제19권1호
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• pp.11-17
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• 2015

This study investigated possible involvement of photoperiodic regulation in reproductive endocrine system of female olive flounder. To investigate the influence on brain-pituitary axis in endocrine system by regulating photoperiod, compared expression level of Kisspeptin and sbGnRH mRNA in brain and FSH-${\beta}$, LH-${\beta}$ and GH mRNA in pituitary before and after spawning. Photoperiod was treated natural photoperiod and long photoperiod (15L:9D) conditions from Aug. 2013 to Jun. 2014. Continuous long photoperiod treatment from Aug. (post-spawning phase) was inhibited gonadal development of female olive flounder. In natural photoperiod group, the Kiss2 expression level a significant declined in Mar. (spawning period). And also, FSH-${\beta}$, LH-${\beta}$ and GH mRNA expression levels were increasing at this period. However, in long photoperiod group, hypothalamic Kiss2, FSH-${\beta}$, LH-${\beta}$ and GH mRNA expression levels did not show any significant fluctuation. These results suggest that expression of hypothalamic Kiss2, GtH and GH in the pituitary would change in response to photoperiod and their possible involvement of photoperiodic regulation in reproductive endocrine system of the BPG axis.

• 한방안이비인후피부과학회지
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• 제29권3호
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• pp.42-49
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• 2016

Objectives : The purpose of this study is to analyze research trends on tinea pedis in studies of Korean medicine.Methods : We searched papers using NDSL, KISS, RISS and KTKP(Korean Traditional Knowledge Portal). The first search used the keyword "Tinea pedis" in NDSL, KISS, RISS and KTKP. Used searching duration was not specified.Results : Studies found in NDSL, KISS and RISS were 122 and 118 studies were excluded. Studies found in KTKP were five papers and four studies of them were excluded. Finally five studies were selected and analyzed. Two studies of five selected ones were experimental researches and three studies were clinical researches. Among 2 researches of experimental researches, one of them was about antifungal efficacy of herbal medicines and ethahol extract of the mixture of Sophorae Subprostratae Radix, Aconiti Radix and Hibisci Syriaci Cortex and hot water extract of Phellodendri Cortex were effective. The other was about antifungal effect of the medicinal herb extraction method and vinegar extract was effective. Among 3 researches of clinical researches, there were one clinical study and two case studies. Functional soap containing herbal medicines and bee venom therapy were effective.Conclusions : As we looked for five researches, which were two experimental studies, one clinical study and two case studies. It is possible to treat tinea pedis with korean medical approach by conclusions of 5 researches. We expect that further researches will be proceeded and following results can be actively used as clinical treatments.

• 한방안이비인후피부과학회지
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• 제27권2호
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• pp.33-50
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• 2014

Objective : The purpose of this study is to analyze research trends on laser output used for treatment of hair loss. Methods : We searched papers using Pubmed, NDSL, KISS, and RISS. First search used the keyword "Laser, Alopecia" in Pubmed. Inclusion criteria were last 15 years, English, related to output. Finally we searched papers using the keyword "Laser and Alopecia" in NDSL, KISS, and RISS. Inclusion criteria were the same as first research except for English. Results : A total of 43 studies were found, 28 studies were excluded and 15 studies were selected and analyzed. And of the 15 studies, 7 studies were foreign papers and 8 studies were domestic papers on clinical application of laser status. Mainly Used type of laser was a diode laser. As a result, we found that treatment group had more improvement than control group. The range of the laser-output was 1mW-150W in Alopecia laser therapy. Conclusions : Low-level (LLLT) as well as High-level laser therapy (HLLT) can be effectively used as an alternative to the treatment of alopecia. Thus, further attention and studies are needed on this topic in order to reduce the side effects and demonstrate the effectiveness clearly.

• 한방비만학회지
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• 제8권2호
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• pp.1-13
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• 2008

Objective This study was designed to collect latest papers and to find more effective approach for Postmenopausal Women Methods We searched 85 papers in English from Pubmed(www.ncbi.nlm.nih.gov) and selected 40 in favor of our study. In addition to that, we searched 24 papers in Korean from Kiss(www.kiss.kstudy.com) and Medric(www.medric.or.kr). Results are as follows. Results and conclusion Many studies showed that postmenopausal obesity causes cardiovascular disease, osteoporosis, breast cancer and decrease in immunity. To prevent and treat obesity, many studies suggested that dietary and exercise are most effective methods. If needed, medicine and hormone therapy may be recommended as next steps. But, Herb medication and acupuncture are not used yet as postmenopausal obesity treatment around the world. Postmenopausal obesity is significant, resulting in many medical problems. We hope more effective treatment based on these studies and combined with Korean traditional medicine could be developed after.

• 한방안이비인후피부과학회지
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• 제30권3호
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• pp.103-118
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• 2017

Objectives : The purpose of this study is to analyze recent research trend on pathology of Meniere's Disease and review the results in Korean Medicine. Methods : We searched MEDLINE on the title "Meniere's Disease" and "pathology" in recent 5 years and searched OASIS with KISS on the title "Meniere's Disease". Results : We found 21 studies on MEDLINE, 9 studies on OASIS and KISS about Meniere's Disease. The results are as follow. 1. In western medicine, the pathology of Meniere's disease is supposed to be related with endolymphatic hydrops and autoimmunity. The causes of endolymphatic hydrops are studied in various viewpoints such as disorder of endolymph drainage and homeostasis abnormality of endolymph. And autoimmunity is assumed to be associated with genetic factor. 2. In Korean medicine, Meniere's disease were mainly treated with acupuncture and hebal medicine. Conclusions : Korean medicinal approaches on pathology of Meneire's disease can be significant in view of endolymphatic hydrops. And on the basis of those outcomes, much more studies have to be researched for Korean medicinal treatment of Meneire's disease.

• 한국컴퓨터정보학회논문지
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• 제29권1호
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• pp.163-176
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• 2024

이 연구의 목적은 정신과 시뮬레이션 기반 학습이 간호학생의 자기 효능감, 문제 해결 능력 및 지식에 미치는 영향을 평가하는 것이다. 2023년 7월까지 PubMed, Cochrane Library, Embase, CINAHL, KISS, RISS, ScienceOn을 검색하였다. 총 1,414명의 간호대학생을 대상으로 한 22개 연구(20개 보고서)에 대해 체계적 문헌고찰과 메타분석을 실시하였다. 전반적으로 정신분야에서 시뮬레이션 기반 학습은 자기 효능감(ES = 0.65, p < 0.001, I²=71%), 문제 해결 능력(ES = 0.15, p < 0.001, I²=27%), 지식(ES = 0.45, p = 0.003, I²=84%)에 유익한 영향을 미치는 것으로 나타났다. 이러한 결과는 시뮬레이션 교육 접근법이 적절히 통합될 경우 정신간호학 교육 환경에서 능동적인 학습 방법론으로 사용될 수 있음을 보여준다.

• 산업융합연구
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• 제22권2호
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• pp.85-96
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• 2024

본 연구는 장애인 1인가구에 관한 연구동향을 살펴보고자 체계적 문헌고찰 연구방법을 활용하였다. 이를 위해 KCI, RISS, KISS, e-Articl 총 4개의 데이터베이스에서 장애인 1인가구, 고령장애인 1인가구, 독거 장애인, 1인가구 등의 연관 검색어를 조합하였고 2023년 9월 30일까지 출판된 2,161건의 논문이 검색되었다. 5단계에 걸쳐 장애인 1인가구와 관련 없는 문헌을 배제하였고, 최종 13건의 문헌을 선정하여 분석하였다. 연구결과, 첫째로 장애인 1인가구 연구주제로 구분한 결과, 1인가구 관련 실태 및 관련 요인분석, 1인가구 관련 쟁점 및 지원방안, 1인가구 관련 사례연구 3개로 연구주제가 구분되었다. 둘째로 장애인 1인가구는 여성일수록, 연령이 높을수록, 소득이 낮을수록, 대인관계능력이 낮을수록, 건강이 나쁠수록, 미취업 상태일수록, 가족지원이 적을수록 삶의 만족도 수준이 낮은 것으로 나타났다. 이에 연구결과를 바탕으로 후속연구에 대한 제언과 사회복지의 실천적, 정책적 함의를 제시하였다.

• Journal of applied mathematics & informatics
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• 제18권1_2호
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• pp.95-112
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• 2005

This work concerns the stabilization of uninfected steady state of an ordinary differential equation system modeling the interaction of the HIV virus and the immune system of the human body. The control variable is the drug dose, which, in turn, affects the rate of infection of $CD4^{+}$ T cells by HIV virus. The feedback controller is constructed by a variant of the receding horizon control (RHC) method. Simulation results are discussed.