약물이행과 관련된 국내 선행연구 고찰

유승희(Yu, Seung Hee),강정희(Kang, JeongHee) 한국보건간호학회 2015 韓國保健看護學會誌 Vol.29 No.2

사용자 생활 습관 개선을 위한 모바일 헬스케어 앱 서비스 연구

이유정(Yu-Jeong, Lee),김정희(Jeonghee, Kim),이세영(Seyoung, Lee),강효진(Hyo-Jin, Kang) 한국HCI학회 2022 한국HCI학회 학술대회 Vol.2022 No.2

장기화된 코로나 팬데믹 상황에서 자신의 일상과 자기발전을 중요시 여기는 MZ 세대의 생활 습관 형성 및 개선 방법으로 리추얼라이프가 주목받고 있다. 본 연구는 모바일 헬스케어 앱 서비스 개선 방안을 제시하는 연구로 MZ 세대의 생활 습관 형성 방법에 대한 사용자 경험을 분석하고, MZ 세대 라이프스타일 특성을 반영하여 그룹 목표 달성을 통한 생활 습관 개선을 목표로 ‘같이하는 운동’, ‘목표달성 운동’, ‘공유하는 운동’서비스를 개선방안으로 제시한다.

Emission Stability of Semiconductor Nanowires

SeGi Yu(유세기),Taewon Jeong(정태원),Sang Hyun Lee(이상현),Jungna Heo(허정나),Jeonghee Lee(이정희),Cheol Jin Lee(이철진),Jinyoung Kim(김진영),HyungSook Lee(이형숙),YoonPil Kuk(국윤필),J.M. Kim(김종민) 한국진공학회(ASCT) 2006 Applied Science and Convergence Technology Vol.15 No.5

열 화학기상법으로 만든 GaN와 GaP 나노와이어에서 전계 방출과, 산소와 아르곤 분위기에서 안정성에 대해 조사하였다. GaN 나노와이어의 경우 산소 분위기에서 전계 방출이 급격하게 줄었으나, GaP에서는 그렇지 않았다. 두 나노와이어 모두 아르곤 분위기에서는 큰 변화가 없었다. GaP 나노와이어의 외부에 존재하는 산화물 층이 전자 방출 안정성에 크게 기여한 것으로 생각된다. 나노와이어에서 방출된 전자의 에너지 분포를 통해 반도체 나노와이어는 탄소 나노튜브와 그 전계 방출 메카니즘이 다름을 유추할 수 있었다. Field emission of GaN and GaP nanowires, synthesized by thermal chemical vapor deposition, and their emission stabilities under oxygen and argon environments were investigated. The field emission current of GaN nanowires was seriously deteriorated under oxygen environment, while that of GaP was not. Both wires did not show any noticeable change under argon environment. The existence of oxide outer shell layers in the GaP nanowires was proposed to be a main reason for this emission stability behavior. Field emission energy distributions of electrons from these nanowires revealed that field emission mechanism of the semiconductor nanowires were different from that of carbon nanotubes.

Double - to one - humped secondary electron emission curve change for thermal silicon oxide layers

SeGi Yu,TaeWon Jeong,Whikun Yi,Jeonghee Lee,S.H. Jin,J.M. Kim,D. Jeon 한국진공학회 2000 한국진공학회 학술발표회초록집 Vol.- No.-

울산대학교 앞 의류매장의 질적 분석

서정희,백재화,복미정,김새봄,김현정,유지영 울산대학교 2004 생활과학논문집 Vol.5 No.2

이 논문은 울산대학교 앞에 있는 의류매장을 다양한 소비행동을 담고 있는 하나의 살아 있는 텍스트로 파악하였다. 즉 현대 소비사회를 읽을 수 있는 하나의 공간매체로 파악하여 분서개상으로 삼았으며, 울산대학교 앞 의류매장을 보다 심층적으로 분석하기 위하여 참여 관찰과 심층면접법과 같은 질적 분석방법을 사용하였다. 매장 운영자의 특성, 결제방법, 서비스, 타 업종과의 관계, 고객의 일반적 특성, 상품, 구매, 매출, 디스플레이, 명품카피, 유행 등을 분석하였다. This paper regarded the clothing shops in University of Ulsan commercial area as a lived text with a various consumption behaviors. The clothing shops was used as a medium for understanding contemporary consumer society. To capture the depth and details of the clothing shops, qualitative methods, participant observation and in-depth interview were used. Shop manager, form of payment, service, relationship, customer, products, purchase, profits, display, copy of luxury goods, fashion, were analyzed.

Evaluation of the acute hepatitis B surveillance system in the Republic of Korea following the transition to mandatory surveillance

Chung Jaehwa,Yu Jeonghee,Cheon Myeongeun,Tak Sangwoo 질병관리청 2024 Osong Public Health and Research Persptectives Vol.15 No.4

Objectives: The prevalence of hepatitis B in the Republic of Korea has declined, yet the disease burden persists. After various changes in targets and methods, the national hepatitis B surveillance system now exclusively monitors acute cases. We aimed to assess the alignment of this system with its intended purpose and to recommend improvements supporting the national strategic plan for viral hepatitis management.Methods: This study assessed acute hepatitis B cases reported to the Korean Disease Control and Prevention Agency’s mandatory surveillance system over a 10-year period (2013–2022). It evaluated 5 factors from the Centers for Disease Control and Prevention’s Updated Guidelines for Evaluating Public Health Surveillance Systems: simplicity, positive predictive value, data quality, timeliness, and usefulness.Results: The nonspecific nature of acute hepatitis B symptoms, along with the complexity of diagnostic criteria, indicated a high potential for misreporting. The surveillance system demonstrated a high positive predictive value (94.4%), with data quality and timeliness also rated high. However, data following the onset of the coronavirus disease 2019 pandemic indicate the need for improvement. Moreover, given the relative importance of specific characteristics of chronic infectious diseases, only limited interventions are implementable through the current surveillance system.Conclusion: The evaluation of the Republic of Korea’s acute hepatitis B surveillance system revealed high positive predictive value, data quality, and timeliness. However, improvements can be made in the misreporting of chronic cases and the system’s usefulness. More accurate reflection of the characteristics of acute hepatitis B cases is essential for better management of viral hepatitis.

Improvement of Field-Emission Characteristics of Carbon Nanotubes by Post Electrical Treatment

Chan-Wook Baik,Jeonghee Lee,Deuk Seok Chung,Seong Chan Jun,Jun Hee Choi,Byung Kwon Song,Min Jong Bae,Tae Won Jeong,Jung Na Heo,Yong Wan Jin,Jong-Min Kim,SeGi Yu,Kyu-Ha Jang,Gun-Sik Park Institute of Electrical and Electronics Engineers 2007 IEEE transactions on electron devices Vol.54 No.9

<P>The field-emission characteristics of carbon nanotubes (CNTs), such as uniformity and brightness, were improved by electrical treatment using nonstationary electric fields between the cathode of screen-printed CNT emitters and the anode of a phosphor-coated indium-tin-oxide glass substrate in diode configuration. Dead or weak emission spots, where almost no emission of electrons was observed, started to emit electrons by applying an alternating-current voltage to the cathode electrode and a constant voltage to the anode electrode. The nonstationary electrical treatment was more effective than the direct-current (dc) and the square-pulsed electrical treatments for the emission uniformity and brightness. It was found that the nonstationary electrical treatment not only activated CNT emitters but also suppressed abnormally high emission spots without the drawbacks of electrical breakdown. Consequently, more than 1.8 and 1.3 times improvements of emission uniformity and brightness, respectively, were obtained after the treatment, when compared with the dc electrical treatment for the same amount of emission currents and the same duration of the treatments. Therefore, the method can be effectively applied to field-emission devices based on CNTs for the enhancement of emission properties.</P>

Controlled Vacuum Breakdown in Carbon Nanotube Field Emission

Chan-Wook Baik,Jeonghee Lee,Deuk Seok Chung,Jun Hee Choi,In-Taek Han,Ha Jin Kim,Shang Hyeun Park,Sun Il Kim,Yong Wan Jin,Jong-Min Kim,Jin Young Kim,SeGi Yu,Kyu-Ha Jang,Gun-Sik Park IEEE 2007 IEEE TRANSACTIONS ON NANOTECHNOLOGY Vol.6 No.6

<P>We report a physical mechanism of controlling vacuum breakdown in field emission from carbon nanotubes (CNTs). The thermal evaporation or runaway of CNT emitters is considered to be responsible for destructive vacuum breakdowns due to an overcurrent through electronically shorted circuits, where misaligned or irregularly long CNT emitters were found. The occurrence of the destructive breakdown, however, could be under control after an electrical treatment using soft breakdowns. Significant improvements of field emission stability and uniformity were achieved by optimally controlled soft breakdowns, which eliminated the short circuits and recovered the field emission with no destruction of electrodes.</P>

Characteristics of a large outbreak arising from a school field trip after COVID-19 restrictions were eased in 2022

Kim Sueng-Jin,Kim Eun-Young,Yu Jeonghee 질병관리청 2024 Osong Public Health and Research Persptectives Vol.15 No.1

Objectives: This study analyzed a large outbreak of coronavirus disease 2019 (COVID-19) that occurred during a high school field trip in the Jeonbuk region and aimed to identify risk factors for COVID-19 infection, with the goal of preventing such outbreaks in the future.Methods: A retrospective cohort study of 737 participants, including 668 students and 69 staff at High School A, was designed to describe the epidemiological characteristics of this large COVID-19 outbreak. Logistic regression analysis was performed to calculate relative risks (odds ratios [ORs]) and 95% confidence intervals (CIs).Results: There were 190 confirmed cases (174 students, 16 staff), with an attack rate of 25.8%. Small outbreaks were decreasing before the field trip, but this trend reversed after the trip, leading to larger outbreaks. Logistic regression showed an OR of 2.39 (95% CI, 1.66–3.43; p<0.05) for COVID-19 infection among field trip participants. Among them, 11th graders had an OR of 2.32 (95% CI, 1.53–3.52; p<0.05) compared to 10th graders, while no significant risk difference was found within same-grade teams.Conclusion: There was a high risk for COVID-19 transmission during extracurricular activities with a large number of participants, such as field trips, even after the nationwide Omicron variant epidemic subsided. Even when students are separated into teams and follow different routes, it is challenging to design routes that entirely prevent contact between teams. Thus, programs should be designed carefully, and students with symptoms should be identified before and during the program to isolate them promptly.

건식 열산화로 성장시킨 SiO₂ 박막의 이차전자 방출 특성

정태원(Taewon Jeong),유세기(SeGi Yu),이정희(Jeonghee Lee),진성환(S.H. Jin),허정나(Jungna Heo),이휘건(Whikun Yi),전동렬(D. Jeon),김종민(J.M. Kim) 한국진공학회(ASCT) 2001 Applied Science and Convergence Technology Vol.10 No.1

열산화시킨 SiO₂ 박막의 두께와 입사 전류의 양에 따라 이차전자 방출 계수를 측정하였다. 930℃에서 열산화시킨 SiO₂ 박막 두께는 5.8㎚, 19㎚, 43㎚, 79㎚, 95㎚, 114㎚였으며 이들의 이차전자의 방출 특성이 박막 두께와 전류량에 따라 변화하는 것을 확인하였다. 박막 두께 43㎚ 이하의 얇은 박막에서는 대체적으로 universal curve의 형태를 따르지만 79㎚ 이상의 두꺼운 박막에서는 이차전자 방출곡선이 최고점이 2개인 형태로 변하며 그 값도 전반적으로 낮아진다. 또 입사시키는 일차전자 전류의 증가에 대해서도 이차전자 방출곡선이 전체적으로 낮아진다. 이 실험에서 측정된 최대 이차전자 방출 계수는 박막 두께 19㎚, 일차 전자 에너지 300eV, 일차 전류 0.97㎂일 때 3.35를 갖는다. 이차전자 방출계수가 최대인 입사에너지에서 전자의 시료내 침투깊이와 탈출깊이와의 관계식을 통하여 박막 두께를 이론적으로 계산하였으며, 실험값과 비교적 일치하는 것을 확인하였다. The secondary electron emission (SEE) yields for the thermally grown SiO₂ thin layers were measured by varying the thickness of the SiO₂ layer and the primary current. SiO₂ thin layers were thermally grown in a furnace at 930℃, whose thickness varied to be 5.8㎚, 19㎚, 43㎚, 79㎚, 95㎚, and 114㎚. When the SiO₂ layers were thinner than 43㎚, it was found that SEE curves followed the universal curve. However, for samples with a SiO₂ layer thicker than 79㎚, the SEE curves exhibited two maxima and the values of SEE yields were reduced. Additionally, as the current of primary electrons increased, the SEE yields were reduced. In this experiment, the maximum value of the SEE yield for SiO₂ layers was obtained to be 3.35 when the thickness of SiO₂ layer was 19㎚, with the primary electron energy 300 eV and the primary electron current 0.97 ㎂. The penetration and escape depth of an electron in the SiO₂ layers were calculated at the primary electron energy for the maximum value of the SEE yield and from these depths, it was calculated that the thickness of the SiO₂ layer.