분리형 접이식 자전거 휠의 설계

유새롬,김진규,이상와,이재홍,김두만 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.4

최근 세계적으로 친환경 녹색 성장이 키워드로 대두됨에 따라 자전거가 새로운 교통수단으로 각광 받고 있다. 이러한 추세에 따라 접기 쉬운 다양한 형태의 접이식 자전거 발전되었다. 그러나 이러한 디자인의 자전거 들은 공기압 타이어를 사용한다는 한계에 직면해 있다. 이러한 한계 때문에 자전거를 분리하거나 접을 수가 없다. 본 논문에서는 이러한 한계를 극복하고자 3단으로 분리하여 접을 수 있는 휠을 소개하고, 공기압 타이어의 성능에 가까운 비공기압 타이어를 소개하고자 한다. 추가로 본 논문은 같은 정적 수직하중 하에서 다양한 형태의 설계의 비교를 포함한다. Rapidly changing world lately as the keyword green with no carbon emissions, environmental pollution and the value of the bike are emerging. Because of these trends, a variety of easy and portable bicycle has been developed. However, the limits of this design in the face of the pneumatic tires, can not fold wheels. This means that the minimum size of a folding bicycle is limited to wheel size. In this paper, want to go beyond these limits, this paper introduce that new design wheel be able to seperate to 3 parts and close to the performace of pneumatic tires. In addition, This paper include design development and vertical displacement were compared by various types under the same static vertical load.

1659년 孝宗의 昇遐와《[孝宗]國葬都監儀軌》

유새롬 서울대학교. 규장각 한국학 연구원 2005 규장각 소장 의궤 해제집 Vol.3 No.-

태음인(太陰人) 열다한소탕(熱多寒少湯)이 3T3-L1 지방전구세포(脂肪前驅細胞) 분화(分化)에 미치는 영향(影響)

유새롬,정수진,신현규,Yoo, Sae-Rom,Jeong, Soo-Jin,Shin, Hyeun-Kyoo 사상체질의학회 2012 사상체질의학회지 Vol.24 No.4

Objectives : Although Yeoldahanso-tang (YDHST) has been widely used for treatment of obesity and its related diseases such as hyperinsulinemia and hypertension for Taeeumin, no scientific evidence has reported yet to support its ability to work against these metabolic disorders. Our study was aimed to investigate the anti-obesity effect of YDHST extract on the cellular differentiation of 3T3-L1 preadipocytes into adipocytes. Methods : 3T3-L1 preadipocytes were differentiated into adipocytes by adding insulin, dexamethasone and 3-isobutyl-1-methylxanthine (IBMX) for 8 days in the absence or presence of YDHST extract. Anti-obesity effects of YDHST extract were evaluated by Oil Red O staining, glycerol-3-phosphate dehydrogenase (GPDH) activity, triglyceride contents, and leptin production. Results : YDHST extract remarkably prevented lipid accumulation with no cytotoxicity in the differentiated 3T3-L1 cells. In addition, YDHST extract decreased contents of triglyceride 3T3-L1 adipocytes. Consistently, YDHST extract caused a significant inhibition of GPDH activity and leptin production in a dose-dependent manner. Conclusions : Our findings suggest that Sasang constitutional herbal formula YDHST for Tae-eumin has anti-obesity activity by regulation of the adipogenesis process in vitro. Additional study will be required to further confirm the inhibitory effect on adipocyte differentiation by using in vivo animal model.

1659년(孝宗 10) 孝宗의 昇遐와 [孝宗]殯殿都監儀軌》

유새롬 서울대학교. 규장각 한국학 연구원. 2004 규장각 소장 의궤 해제집 Vol.2 No.-

외규장각 어람용 의궤의 형태적 특징에 관한 기초적 연구

유새롬 조선시대사학회 2013 朝鮮時代史學報 Vol.66 No.-

이 논문은 어람용 의궤의 종합적 연구를 위한 기초적인 연구로서 먼저 어람용 의궤의 연원을 검토하고, 이어서 어람용과 분상용이 함께 있는 『莊烈王后殯殿魂殿都監儀軌』(1689), 『孝章世子冊禮都監儀軌』(1725), 『孝純賢嬪墓所都監儀軌』(1752) 등 17세기 후반~18세기 중반의 외규장각 의궤 3종을 중심으로 어람용 의궤의 편집 체재, 제작 방법과 재료 등의 특징을 밝히고자 하였다. 의궤는 조선 초부터 복본을 제작하여 중앙 관청과 지방 사고에 나누어 보관했으며 이러한 전통은 조선 후기까지 이어졌다. 기존 연구에서는 어람용 의궤의 연원을 병자호란 이후로 보는 견해가 있었으나, 외규장각 의궤와 『강화부외규장각형지안』 등의 문헌 기록을 통해 이미 광해군 대에 어람용 의궤가 편찬되었음을 확인하였다. 나아가 태종 대 어람용 홀기의 표지를 紅綾으로 제작한 사례, 중종 대 天使 영접 관련 의궤를 大內로 들이라고 한 사례 등을 통해 어람용 의궤가 조선 전기부터 편찬되었을 가능성을 밝혔다. 어람용 의궤의 특징 중 편집 체재는 어람용과 분상용의 분량 및 책수의 차이에 주목하였다. 어람용 의궤가 분상용 의궤와 분량이 차이나는 주요 원인 중 하나는 ‘御覽’이라는 형식에 맞도록 분상용과 구별되는 ‘擡頭法’과 같은 편집 원칙을 적용했기 때문이었다. 또, 의궤의 종류에 따라 어람용과 분상용이 분책되는 시기와 책 수가 다른 점도 확인하였다. 특히 『장렬왕후빈전혼전도감의궤』와 『효장세자책례도감의궤』의 어람용은 2책, 분상용은 1책으로 서로 그 책 수가 다른데, 이는 해당 의궤의 분량이 급증한 것과 관련이 있다. 전자는 예송 논쟁과 관련하여 服制, 후자는 왕위 계승의 정통성과 관련한 세자 책봉 문제가 논란이 되었던 시기와 일치한다는 점에서 해당 의례 절차와 준비 과정에 대한 보다 상세한 기록이 필요했던 것으로 추정되며, 이는 당시 정국의 동향과 연관 지어 살펴볼 필요가 있다. 의궤의 제작 방법과 재료는 「의궤사목」의 문헌 기록과 외규장각 의궤의 실사 결과를 함께 검토하여 기존 연구를 보완하였다. 종이와 표지, 변철 등은 어람용과 분상용의 차이가 날 뿐만 아니라 시기별로 그 특징이 다름을 확인하였다. 특히 『효순현빈묘소도감의궤』는 18세기 중반 어람용 의궤의 표지 직물이 紋緞에서 紬로 변천되는 과정을 생생하게 보여주는 사료로서 영조의 문단 금지 조치와 喪禮 정비 과정에서 그 의미를 확인할 수 있다. 이처럼 의궤는 의궤에 기록된 내용뿐만 아니라 의궤의 제작 과정, 혹은 제작 상 나타나는 의궤의 물리적 특징 등이 연구 대상으로서 가치가 있다. 특히 어람용 의궤는 왕의 열람을 위해 특별히 제작되었다는 점에서 ‘왕조국가’로서의 조선의 문화적 특징을 파악하는 단초로서 연구 가치가 있을 것이다. In an effort to lay the foundation for more comprehensive research on the king’s copies of Uigwe, this paper first uses historical records to consider the origin of king’s copies. Then, the editing principles, production method, and materials of king’s copies are investigated through a firsthand examination of the following three Oegyujanggak Uigwe titles, produced from the late 17th to mid-18th century: Jangnyeol Wanghu Binjeon- Honjeon Dogam Uigwe (Royal Protocols on the Rites of Enshrining the Coffin and Ancestral Tablet of Dowager Queen Jangnyeol, 1689); Hyojang Seja Chaengnye Dogam Uigwe (Royal Protocols on the Rite of the Investiture of Crown Prince Hyojang, 1725); and Hyosun Hyeonbin Myoso Dogam Uigwe (Royal Protocols on the Rites Related to the Tomb of Dowager Princess Hyosun, 1751). Beginning in the early Joseon Dynasty, multiple copies of each Uigwe were produced and stored in government facilities in the capital and state archives in the provinces (respectively). This tradition lasted until the late Joseon Dynasty. Previous studies have theorized that king’s copies were first produced after the Manchu Invasion of Korea in 1636, but the Oegyujanggak Uigwe and other documents, such as Ganghwa-bu Oegyujanggak Hyeongjian (Inventory of Collection at Oegyujanggak in Ganghwa-bu), prove that king’s copies were produced at least as early as the reign of Prince Gwanghaegun (r. 1608-1623). Other evidence suggests that the tradition of king’s copies may even have begun in the early Joseon Dynasty. For example, during the reign of King Taejong (r. 1400-1418), king’s copies of holgi (document listing the proper order of a rite) were made with red silk covers, and King Jungjong (r. 1506-1544) is known to have produced Uigwe on the rite of receiving imperial envoys from Ming, with one copy to be kept inside the royal palace. Present research revealed that king’s copies of Uigwe had more pages and more volumes than general copies. The added length can be attributed to some special editing principles, including daedubeop (擡頭法), wherein lines that refer to the king, queen, or other high-ranking royal family members were vertically elevated above other lines, in order to convey the utmost respect. In the later period, as the table of contents and the content itself increased, Uigwe tended to be bound as separate fascicles. However, this study reveals that, for certain types of Uigwe, this practice began earlier for king’s copies than for general copies, indicating that the king’s copies had more volumes. Furthermore, these changes in the binding procedure emerged at different times, depending on the topic of the Uigwe. For example, Jangnyeol Wanghu Binjeon Honjeon Dogam Uigwe and Hyojang Seja Chaengnye Dogam Uigwe considerably increased in length, such that the king’s copies of these titles were expanded to two volumes, while the general copies still had only one volume. The former title was produced after debates called yesong nonjaeng about the period of wearing mourning clothes for a deceased family member. The latter title was produced when Crown Prince Hyojang was installed amidst fierce controversy over the legitimacy of the succession to the throne of King Yeongjo. In these cases, there was likely demand for more detailed records of the rites in question, and these examples should be examined in relation to their political context. Existing research has presented the production method of Uigwe, including the type of material used. This paper complements those previous studies by analyzing the records of “Uigwe Samok” (Regulations of Uigwe Production) and examining the actual Oegyujanggak Uigwe. It was found that king’s copies differed from general copies in terms of the type of paper, the cover, and the byeoncheol (brass strips along the sides of the front and back covers). Moreover, for king’s copies, these elements developed and changed over time. In particular, the king’s copies of...

1674년(顯宗 15) 顯宗의 昇遐와 [顯宗]殯殿都監儀軌》

유새롬 서울대학교. 규장각 한국학 연구원. 2004 규장각 소장 의궤 해제집 Vol.2 No.-

오적산의 추출 용매 차이에 따른 염증 및 염증 관련 질환에 대한 효능 비교

유새롬,정수진,김예지,임혜선,진성은,전우영,신인식,신나라,김성실,김정훈,하혜경,이미영,김온순,서창섭,신현규,Yoo, Sae-Rom,Jeong, Soo-Jin,Kim, Ye-Ji,Lim, Hye-Sun,Jin, Seong-Eun,Jeon, Woo-Young,Shin, In-Sik,Shin, Na-Ra,Kim, Seong-Sil,Kim, Jung-Hoon,Ha 대한한방내과학회 2012 大韓韓方內科學會誌 Vol.33 No.4

Objectives : Ojeok-san, a traditional herbal formula, has been used for the treatment of cold illness and its related symptoms such as headache, nausea and indigestion. This study was performed to compare effects of water (OJSW) and 70% ethanol extracts (OJSE) of Ojeok-san on inflammation and its related diseases atopy, asthma and obesity in vitro. Methods : We performed HPLC to investigate contents of index components of OJSW and OJSE. We investigated the effects of OJSW and OJSE with an in vitro model, using 5 cell lines, specifically RAW 264. 7, HaCaT, MC/9, BEAS-2B and 3T3-L1. Results : HPLC analysis displayed that the contents of index components were higher in OJSE than OJSW. In lipopolysaccharide (LPS)-treated RAW 264.7 macrophages, OJSE significantly inhibited productions of interleukin (IL)-6, nitrite and prostaglandin $E_2$ ($PEG_2$). In TNF-${\alpha}$/IFN-${\gamma}$-treated HaCaT keratinocytes, OJSE significantly lowered levels of macrophage-derived chemokine (MDC) as well as regulated and normal T cell expressed and secreted (RANTES). OJSE also had a protective effect on inflammatory response by decreasing RANTES secretion in TNF-${\alpha}$-stimulated BEAS-2B cells. Conclusions : We conclude that OJSE could be more appropriate to enhance the biological activities against inflammation and its related diseases, and could be applied as a bioactive material for developing the potent anti-inflammatory agents.

Single Oral Dose Toxicity Evaluation of Samul-tang, a Traditional Herbal Formula, in Crl:CD (SD) Rats

유새롬,정수진,신현규 대한한의학회 2014 대한한의학회지 Vol.35 No.2

Background: Samul-tang (Si-Wu-Tang, SMT) is a traditional herbal formula, which has been widely used to treat various diseases such as menstrual irregularity, bleeding and leucorrhea. Although many studies have investigated the pharmacological properties of SMT, its toxicity information has not yet been fully elucidated. Methods: Five Sprague Dawley (SD) rats of each sex were given a single dose (5000 mg/kg) of SMT by gavage; control rats received the vehicle only. After the single administration, mortality, clinical signs, body weight changes and gross findings were monitored for 15 days in accordance with Good Laboratory Practice (GLP) principles. Results: In a single oral dose toxicity study, there was no adverse effect on mortality, clinical sign, body weight change or gross finding in any treatment group. Conclusions: The results indicate that SMT did not induce toxic effects at a dose level up to 5000 mg/kg in rats and its median lethal dose (LD50) was considered to be over 5000 mg/kg/day body weight for both genders.

憲宗의 즉위와《純宗大王仁陵山陵都監儀軌》

유새롬 서울대학교. 규장각 한국학 연구원 2003 규장각 소장 의궤 해제집 Vol.1 No.-

히스테리시스 거동을 하는 탄성체의 비선형 점탄성 구성방정식

유새롬(Sairom Yoo),주재형(Jaehyung Ju),최석주(Seok-Ju Choi),김두만(Dooman Kim) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.4

정확한 점탄성 재료의 히스테리시스 모델은 에너지 손실을 정량화 하는데 매우 중요하다. 우리는 본 논문에서 대변형 상태의 탄성체에 대한 비선형 초-점탄성 지배방정식 모델을 제시하고자 한다. 본 연구는 Hoofatt의 모델에서 Neo-Hookean 초탄성 모델 대신 Yeoh 초탄성 모델로 지배 방정식을 유도하여 탄성체의 점탄성 거동을 모델링하였다. 또한 폴리우레탄 시편을 사용하여, 평균 변형률 εm=1.5, 진폭 변형률 εα=0.2~0.8, 주파수 f=0.02~0.2의 조건에서 단축 사인형 반복 하중 실험과 제시한 점탄성 모델을 Matlab으로 비교하였다. 본 연구의 점탄성 모델은 변형률이 230% 이상의 대변형 상태의 에너지 손실도 계산할 수 있다. An accurate hysteresis model of an elastomer is important for quantifying viscoelastic energy loss. We suggest a highly nonlinear hyper-viscoelastic constitutive model of elastomers. The model captures a nonlinear viscoelastic characteristic by combining Yeoh’s hyperelastic model and Hoofatt’s hysteresis model used Neo-Hookean hyperelastic model. Analytical and numerical models were generated from uniaxial cyclic tests of an elastomer under a sinusoidal load with a mean strain of 150%, amplitudes of 20~80%, and frequencies of 0.02~0.2㎐. The viscoelastic model can highly capture the viscoelastic energy loss up to a strain of 230%.