국내 평가 가이드 라인 제시를 위한 전동식 부항기의 특성 조사에 관한 연구

이승호,김은정,신경훈,남동우,강중원,이승덕,이혜정,이재동,김갑성,Yi, Seung-Ho,Kim, Eun-Jung,Shin, Kyung-Hoon,Nam, Dong-Woo,Kang, Jung-Won,Lee, Seung-Deok,Lee, Hye-Jung,Lee, Jae-Dong,Kim, Kap-Sung 대한침구의학회 2010 대한침구의학회지 Vol.27 No.1

Objectives : The mechanical properties of Korean electric cupping systems are studied via experimental measurements. The study aimed at establishing the fundamentals of industrialization and systemization of oriental medicine device industry, as well as improving the quality of life for many Koreans. Methods : We reviewed the studies on traditional cupping as well as modern one to fine necessary factors for electric cupping systems. To characterize the mechanical properties of Korean electric cupping systems, we measured the pressure characteristics of commercially available electric cupping system by using an automatic pressure acquisition system and a standard cup. The pumping capability was checked at 40 seconds, and the stability of the suction cup was checked at 600 seconds. We also acquired the noise level of each system in clinical setting. To check the portability of each system, we also measured its physical dimensions. We scrutinized system manuals provided by the system manufacturers. Results : It took less than 5 second to reach the pressure if the connection between the air hose and the vacuum valve of the cupping system was secure. Pressure diminished to no more than 10% for 600s for all systems. Noise levels were 55~70 dB. Increase in pressure was too fast to control for a designated vacuum level except for one product. Conclusions : The Pumping ability of the systems is impressive and reliable. Pressure retention ability of each cup is quite reliable and reproducible. Therefore, their mechanical performances were worthy of recommendation. Some of them had noise level higher than 60 dB and they were bothersome. It was also suggested that the control for low to middle pressure needed to be accomplished by the cupping system.

Separation and Characterization of Dust and Ground Water Particulates Using Gravitational SPLITT Fractionation.

이승호,박희영,이상근,용성권,음철훈,Lee, Seung Ho,Park, Hui Yeong,Lee, Sang Geun,Yong, Seong Gwon,Eum, Cheol Hun Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.6

Split-flow thin (SPLITT) cell Fractionation(SF) is a technique that allows separation of particulates and macromolecules into two fractions. A gravitational SF(GSF) system is constructed and tested for its applicability for separation of dust and ground water particulates. When tested with polystyrene latex particles, experimental data were in good agreements with theory. The 9.8 and 21.4㎛ polystyrene particles were successuflly separated in a continuous mode, where the mixture is continuously fed into the GSF channel allowing separation in a large sacle. The GSF system is successfully applied to continuous separation of dust and ground water particels based on the sedimentation coefficient, which is closely related to the particle size. The separations were confirmed by microscopy and energy-dispersive X-ray (EDX) analysos.

발사형 소형정찰 로봇 개발

이승호,정원석,이민구,박지혁,박현수,유규제,김수현,Lee, Seung-Ho,Jung, Won-Suk,Lee, Min-Gu,Park, Ji-Hyuk,Park, Hyun-Soo,Yoo, Kyu-Jae,Kim, Soo-Hyun 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.5

Recently, the study on small-sized reconnaissance robot has been progressed through grafting robot technology to military fields for minimizing the casualties. Especially, throwable robots have been focusing for their's efficiency in anti-terror operation. However, it is impossible to launch throwable robot to long range(approximately 100m) by hand. So we need another type of robots, so called launchable robots, which can launch farther and is more accurate by launcher. In this paper, we presented the process of developments of launchable robots('launchbot') which are available for remote launch from collection of user's opinions to field test. Based on the opinions of users, we established the goal of development, designed and manufactured the robots. Through the field test, we found that our launchable robot satisfied the performance requirements.

치주임상에서의 정주진정법의 적용

이승호,이준영,박정주,Lee, Seoung-Ho,Lee, Jun-Young,Park, Jung-Ju 대한치과마취과학회 2004 Journal of Dental Anesthesia and Pain Medicine Vol.4 No.1

Chronic periodontitis is one of the most common disease in clinical dentistry, which needs various surgical interventions to treat the moderate to severe destruction of supporting periodontium. Most patients have fear and anxiety to these surgical procedures and some dentists also have problems to deal with these patients. Applying the conscious sedation technique in outpatient units, periodontists have become to manage their patients successfully without any fear and anxiety and increased the level of patients' satisfaction. Particularly, periodontal treatments require relative long chair-time and patients are usually reluctant to the periodontal instruments used in the oral cavity. This study is focused on the sedation procedure with intravenous midazolam infusioon performed in Department of Periodontology, Ewha Womans University Hospital. The whole procedure of intravenous midazolam sedation is briefly reviewed from patient selection to patient discharge.

일본의 교통안전시설 정비 사례 - 교통안전대책을 중심으로 -

이승호,Lee, Seung-Ho 한국도로학회 2005 도로 : 도로학회지 Vol.7 No.1

인스타그램 고객의 지속적 사용의도 결정요인: 성별의 조절효과를 중심으로

이승호,김창식,곽기영,Lee, Seoungho,Kim, Changsik,Kwahk, Keeyoung 디지털산업정보학회 2016 디지털산업정보학회논문지 Vol.12 No.2

The objective of this study is to investigate the determinants of the intention of continued Instagram usage. For this study, we used a self-administered survey questionnaire in which all of the scales were adapted from the previous literature. In this paper, we introduce a research model that consists of three antecedents (perceived usefulness, perceived playfulness, and customer satisfaction) that were thought to cause the intention of continued Instagram usage. The data were collected from 150 Instagram users. In order to validate the proposed research model, we used the SmartPLS 2.0. We used a two-step approach, recommended by Anderson and Gerbing(1988), that comprises a measurement model and structural model. The results showed that two antecedent factors (perceived usefulness and perceived playfulness) had a significant impact on customer satisfaction, which then causes the intention of continued usage. This study highlights the importance of the moderating effect of gender. Based on the results, this study proposes useful implications for Instagram stakeholders.

상악동 내 노출된 임플란트의 치유양상

이승호,최병호,주석강,정재형,유태민,이현중,이경욱,허진영,Lee, Seoung-Ho,Choi, Byung-Ho,Zhu, Shi-Jiang,Jung, Jae-Hyung,You, Tae-Min,Lee, Hyeon-Jung,Li, Jingxu,Huh, Jin-Young 대한치주과학회 2005 Journal of Periodontal & Implant Science Vol.35 No.4

1. Objective. The aim of this study was to investigate whether dental implant exposure to the maxillary sinus cavity increases the risk of maxillary sinus complications. 2. Study design. An implant was placed bilaterally in the maxillary sinus of eight adult female mongrel dogs in a way that it penetrated the bone and mucous membrane of the maxillary sinus floor to the extent of 2 mm, 4 mm, or 8 mm. The implants were left in place for six months. 3. Results. Radiographic and histologic examinations did not show any signs of pathologic findings in the maxillary sinus of the eight dogs. 4. Conclusion. This study indicates that implant protrusion into the maxillary sinus cavity is not related to the development of sinus complications.

눈깜빡임 패턴에 기반한 십진 패스워드 입력 방법

이승호,Lee, Seung Ho 한국정보통신학회 2022 한국정보통신학회논문지 Vol.26 No.5

Password with a combination of 4-digit numbers has been widely adopted for various authentication systems (such as credit card authentication, digital door lock systems and so on). However, this system could not be safe because the 4-digit password can easily be stolen by predicting it from the fingermarks on the keypad or display screen. Furthermore, due to the prolonged COVID-19 pandemic, contactless method has been preferred over contact method in authentication. This paper suggests a new password input method based on eyeblink pattern analysis in video sequence. In the proposed method, when someone stands in front of a camera, the sequence of eyeblink motions is captured (according to counting signal from 0 to 9 or 9 to 0), analyzed and encoded, producing the desired 4-digit decimal numbers. One does not need to touch something like keypad or perform an exaggerated action, which can become a very important clue for intruders to predict the password.

송년사

이승호,Lee, Seung-Ho 한국낙농육우협회 2005 낙농·육우 Vol.25 No.12

A New Sampling and SEC Method for Analysis of Underivatized Cellulose

이승호,박희영,Lee, Seung Ho,Park, Hee Young Korean Chemical Society 1998 대한화학회지 Vol.42 No.2

A new sampling and size exclusion chromatography (SEC) method for the analysis of underivatized cellulose are established. In this method, cellulose materials are first dissolved in N-methylmorpholine N-oxide (NMMO) and diluted by adding dimethyl sulfoxide (DMSO) to make the sample solutions of about 0.1% in 50/50 NMMO/DMSO (w/w). Sample solutions are analyzed using a glucose-treated divinylbenzene (DVB) SEC column and DMSO containing 0.05M LiBr and 2.5 blank as the eluant. The flow rate was constant at 1 mL/min and the whole SEC system including the column was heated at $80^{\circ}C$ to reduce the viscosity of DMSO. Addition of 0.05 M LiBr eliminated SEC baseline drifting, and addition of 2.5 blank seems to reduce the interaction between the sample and the column packing. SEC molecular weights were determined using a calibration curve constructed from a series of narrow pullulan standards, and they were used to measure the degree of degradation during two different pulp-to-sponge processings. 셀룰로스시료를 치환체로 만들지 않고 분자량 및 분자량분포를 결정하기 위한 새로운 시료처리 및 크기배제크로마토그래피방법을 확립하였다. 먼저 셀룰로스시료를 N-methylmorpholine N-oxide (NMMO)에 녹인 후 dimethyl sulfoxide (DMSO)에 희석함으로써 50/50(w) NMMO/DMSO에 녹은 약 0.1%의 시료용액을 만들었다. 컬럼으로는 글루코오스를 입힌 polydivinylbenzene 겔을 채운 크기배제크로마토그래피용 컬럼을 이용하였으며 용리액으로는 0.05M의 LiBr와 2.5%의 바탕용액을 포함하는 DMSO를 이용하였다.유속은 1 mL/min로 일정하게 유지하였고, DMSO의 점도를 낮추기 위해 컬럼을 포함하는 전체 시스템을 80$^{\circ}C$ 로 유지하였다. 0.05M의 LiBr를 가함으로써 SEC바탕선의 표류를 방지할 수 있었고 2.5%의 바탕용액을 가함으로써 시료와 컬럼충진물질 사이의 상호작용을 감소시키는 효과를 얻었다. 좁은 분포를 가지는 pullulan표준물질로부터 얻은 컬럼보정곡선을 이용하여 두 개의 I 펄프시료와 두 개의 셀룰로스 스펀지 시료의 평균분자량을 결정함으로써 펄프로부터 스펀지를 만드는 서로 다른 두 가지 공정에서의 셀룰로스 분자들의 분해정도를 결정, 비교할 수 있었다.