A rechargeable Aqueous Zn-CO₂ Battery for Energy Storage and Highly Efficient CO₂ Fization

Yejin Yang(양예진),Arim Seong(성아림),Sewon Pyo(표세원),Hyojea Hwang(황효제),Sangwook Joo(주상욱),Jinkyung Oh(오진경),Hyoi Jo(조효이),Donghwi Jeong(정동휘),Hyunmin Kim(김현민),Minseo Kim(김민서),Nayeon Ko(고나연),Sihyuk Choi(최시혁),Gun 한국에너지기후변화학회 2020 한국에너지기후변화학회 학술대회 Vol.2020 No.11

POSTER PRESENTATION 1: Emergency Medical Services/Disaster Medicine/Public Health : PS1-67 ; Assessment after The Emergency Medical Education in PCU in Avissawella, Sri - Lanka

( Yejin Hutchison ),( Tae Ho Lim ),( Hyung Goo Kang ),( Jae Hoon Oh ),( Hyuk Joong Chow ),( Young Soon Cho ),( Hyun Jong Kim ) 대한응급의학회 2014 대한응급의학회 학술대회초록집 Vol.2014 No.2

The improvement of emergency medical services by providing the educational programs that will improve the emergency medical knowledge and technique as it is needed. In September 25th, 2013, the Korean emergency medicine physicians were dispatched to the Preliminary Care Unit in Avssawella, Sri-Lanka for three days to provide three courses of education programs consist of airway management, wound management, and an ultrasound education for medical personnel. After six months, we have revisit the Preliminary Care Unit to examine through questionnaire and in-depth interview for the educational effectiveness, actual application of these knowledge in the clinical care situation and change in providing the medical service. Although there was limitation of participant loss due to moving to different sector of hospitals. But, from the information gathered from surveys and interviews have shown that maintenance of the educational contents and applying the knowledge to clinical application was successful to meet the final goal of these educational training programs. 6 out of 19 participants from the ultrasonography education, 9 out of 24 participants from the airway management and 12 out of 48 participants from the wound management program have responded to follow up progress result and have shown overall satisfactory scores range from 4.82 to 4.86 points out of 5 points from the education programs. The overall data have shown that education program was successful to applying it to real clinical bases and it will improve the quality of emergency services by improving their emergency medical knowledge and technique.

Effect of Sildenafil as a treatment for anxious phenotypes in mild ischemic stroke

Yejin Song,Yeon Hee Yu,Hyuna Im,Yu Ran Lee,Gun Woo Kim,Changmin Hwang,Hankyu Kim,Jeong-Oh Shin,Dae-Kyoon Park,Duk-Soo Kim 대한체질인류학회 2022 대한체질인류학회 학술대회 연제 초록 Vol.65 No.-

Clinical characteristics and prognosis of breast cancer diagnosed during pregnancy

( Yejin Kim ),( Seo-yeon Kim ),( Do Youn Kwon ),( Hyea Park ),( Suk-joo Choi ),( Soo-young Oh ),( Cheong-rae Roh ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-

Objective: To describe the clinical characteristics of breast cancer diagnosed during pregnancy and to compare their prognosis with non-pregnant breast cancer patients. Methods: This is a retrospective cohort study of 187 breast cancer patients less than 45 years of age in a single tertiary care hospital from 1995 to 2018. Clinical characteristic and outcome of 47 pregnant women who were diagnosed with breast cancer during pregnancy (pregnancy group) were reviewed, and their prognosis was compared with 140 non-pregnant breast cancer patients (non-pregnancy group). Results: The incidence of breast cancer during pregnancy was 8/10,000 (47/58,043). Termination of pregnancy was done in 4 patients, cancer treatment during pregnancy was done in 33 patients (surgery in 23 patients and chemotherapy in 32 patients), cancer treatment after iatrogenic preterm delivery was done in 8 patients, and delayed cancer treatment until delivery for obstetrical indications was done in 2 patients. The mean age of diagnosis was significantly higher in the non-pregnancy group than the pregnancy group. The stage at diagnosis, nuclear grade and Ki-67 expression rate were significantly higher, but estrogen receptor (ER) expression rate was significantly lower in the pregnancy group than the non-pregnancy group.. Other characteristics of breast cancer including histologic type, laterality, progesterone receptor (PR) expression rate and HER2 expression rate were comparable between the two groups. Mortality rate was not significantly different between the two groups (pregnancy group vs. non-pregnancy group: 17.0% vs. 7.9%, p=0.093), however, Kaplan-Meier survival analysis and Cox regression analysis showed a lower survival rates in the pregnancy group than the non-pregnancy group. Conclusion: Breast cancer during pregnancy was associated with higher stage, higher nuclear grade, higher Ki-67 expression rate and lower ER expression rate and a lower survival rate than non-pregnant controls.

Outcomes of gestational diabetes mellitus in twin pregnancies according to two different criteria; Carpenter-Coustan criteria and National Diabetes Data Group criteria

( Yejin Kim ),( Seo-yeon Kim ),( Do Youn Kwon ),( Hyea Park ),( Suk-joo Choi ),( Soo-young Oh ),( Cheong-rae Roh ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-

Objective: To compare the obstetric and perinatal outcomes in twin pregnancies according to two different criteria for gestational diabetes mellitus (GDM); Carpenter-Coustan (CC) vs. National Diabetes Data Group (NDDG) criteria. Methods: This is a retrospective cohort study of 1,663 twin pregnancies including 1,550 women without GDM (non-GDM group), 31 women who would meet the diagnostic criteria for GDM by the CC criteria, but not by the NDDG criteria (CC group), and 82 women who met the diagnostic criteria for GDM by the NDDG criteria (NDDG group). Patients with pregestational diabetes, monoamniotic twins, intrauterine fetal death before 24 gestational weeks and twin-to-twin transfusion syndrome were excluded. Obstetric and perinatal outcomes were compared among the three groups. Results: The incidence of GDM in twin pregnancies was 113 (6.8%) by the CC criteria and 82 (4.9%) by the NDDG criteria. Mean maternal age of the NDDG group was significantly higher than the non-GDM group or CC group. The rate of PPROM was significantly different among groups (non-GDM group vs. CC group vs. NDDG group: 16.3% vs. 32.3% vs. 28.0%, p=0.002). However, other obstetric outcomes including preterm delivery, preeclampsia, placenta previa, placenta abruptio, congenital anomaly, fetal death after 24 gestational weeks, fetal growth restriction and cesarean section were comparable among the three groups. The proportion of neonates with Apgar score <4 at 1 minute (2.1% vs. 6.5% vs. 4.9%, p=0.008) and hypoglycemia for (3.2% vs. 1.6% vs. 6.7%, p=0.035 for hypoglycemia) were significantly different among three groups. However, other perinatal outcomes were not significantly different among the three groups. Conclusion: Gestational diabetes in twin pregnancies according to two different criteria were not associated with increased risk of adverse obstetric and perinatal outcomes, except for increased risk of PPROM, low Apgar scores at 1 minute and hypoglycemia of newborns.

Newly Designed Cu/Cu₁₀Sn₃ Core/Shell Nanoparticles for Liquid Phase-Photonic Sintered Copper Electrodes: Large-Area, Low-Cost Transparent Flexible Electronics

Oh, Sang-Jin,Kim, Tae Gon,Kim, So-Yun,Jo, Yejin,Lee, Sun Sook,Kim, Kukjoo,Ryu, Beyong-Hwan,Park, Jang-Ung,Choi, Youngmin,Jeong, Sunho American Chemical Society 2016 Chemistry of materials Vol.28 No.13

<P>The conductive nanomaterials applicable to unconventional printing techniques have attracted a great deal of attention, and in particular, cost-effective copper-based electrode materials have been recognized as viable candidates for replacement of the expensive silver counterpart. In this study, we synthesize newly designed Cu/Cu10Sn3 core/shell nanoparticles, as an additive material for overcoming the critical drawbacks in Cu nanoparticle-based electrodes, in combination with a large-area processable, continuous photonic sintering process on a time scale of 10-3 s. By virtue of the low-melting point nature of the Cu10Sn3 phase, the facile electrode fabrication process is easily triggered, yielding resistivities of 27.8 and 12.2 mu O cm under energy dose conditions of 0.97 and 1.1 J/cm2, respectively, at which highly conductive electrodes cannot be obtained from phase-pure Cu nanoparticles. The suspension mixture of Cu and Cu/Cu10Sn3 nanoparticles permits roll-to-roll processable, highly uniform Cu-based electrodes (with a sheet resistance and a standard deviation of 1.21 and 0.29 O/square, respectively) even on vulnerable polyethylene naphthalate substrate, while the electrodes derived from Cu10Sn3 phase-free Cu nanoparticles suffer from nonuniform characteristics and even a partially insulating nature. The practical applicability of Cu/Cu10Sn3 core/shell nanoparticles is demonstrated with the fabrication of a touch screen panel and an antenna for wireless power transmission.</P>

The Multifaceted Clinical Characteristics of Congenital Cytomegalovirus Infection: From Pregnancy to Long-Term Outcomes

Kim Yejin,Kim Yoo-min,Kim Doo Ri,Kim Han Gyeol,Sung Ji-Hee,Choi Suk-Joo,Oh Soo-young,Kim Yae-Jean,Chang Yun Sil,Kim Dongsub,Kim Jung-Sun,Moon Il Joon,Roh Cheong-Rae 대한의학회 2023 Journal of Korean medical science Vol.38 No.32

Background: The aim of this study was to capture multifaceted clinical characteristics of congenital cytomegalovirus (CMV) infection from diagnosis to treatment using a multidisciplinary approach including obstetrics, pediatrics, pathology, and otorhinolaryngology-head and neck surgery. Methods: This is a retrospective study including 30 consecutive cases of congenital CMV infection that were diagnosed at a single tertiary hospital located in Seoul, Korea from January 2009 to December 2020. Congenital CMV infection was defined as a positive result by polymerase chain reaction from urine, saliva or cerebrospinal fluid or positive CMV IgM from neonatal blood sampled within 3 weeks after birth. All cases were analyzed with respect to whole clinical characteristics from diagnosis to treatment of congenital CMV by a multidisciplinary approach including prenatal sonographic findings, maternal immune status regarding CMV infection, detailed placental pathology, neonatal clinical manifestation, auditory brainstem response test, and antiviral treatment (ganciclovir or valganciclovir). Long-term outcomes including developmental delay and hearing loss were also investigated. Results: The total number of births during the study period in our institution was 19,385, with the prevalence of congenital infection estimated to be 0.15%. Among 30 cases of congenital CMV, the median gestational age at delivery was 32.2 weeks [range, 22.6–40.0] and 66.7% of these infants were delivered preterm at less than 37 weeks. Suspected fetal growth restriction was the most common prenatal ultrasound finding (50%) followed by ventriculomegaly (17.9%) and abnormal placenta (17.9%), defined as thick placenta with calcification. No abnormal findings on ultrasound examination were observed in one-third of births. Maternal CMV serology tests were conducted in only 8 cases, and one case each of positive and equivocal IgM were found. The most common placental pathologic findings were chronic villitis (66.7%) and calcification (63.0%), whereas viral inclusions were identified in only 22.2%. The most common neonatal manifestations were jaundice (58.6%) followed by elevation of aspartate aminotransferase (55.2%) and thrombocytopenia (51.7%). After excluding cases for which long-term outcomes were unavailable due to death (n = 4) or subsequent follow up loss (n = 3), developmental delay was confirmed in 43.5% of infants (10/23), and hearing loss was confirmed in 42.9% (9/21) during the follow-up period. In our cohort, 56.7% (17/30) of neonates were treated for congenital CMV with ganciclovir or valganciclovir. Conclusion: Our data show that prenatal findings including maternal serologic tests and ultrasound have limited ability to detect congenital CMV in Korea. Given that CMV is associated with high rates of developmental delay and hearing loss in infants, there is an urgent need to develop specific strategies for the definite diagnosis of congenital CMV infection during the perinatal period by a multidisciplinary approach to decrease the risks of neurologic impairment and hearing loss through early antiviral treatment.

음식물 폐기물을 이용한 바이오 에너지 생산 및 오염물질 제거

이예진(Yejin Lee),오석영(Seok-Young Oh) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

Remaining Useful Life Prediction of UV Lamp Using Survival Analysis

Eun Oh,Jia Choi,Yejin Kim,Dong Gu Choi 대한산업공학회 2022 대한산업공학회 춘계학술대회논문집 Vol.2022 No.6

플랫폼 종사자 보호를 위한 노동법적 지위 규정 방안 - 노무제공관계의 다변화에 따른 종속성 판단을 중심으로 -

김예진 ( Yejin Kim ),김정우 ( Jeongwoo Kim ),오상흔 ( Sangheun Oh ),강현규 ( Hyungyu Kang ) 고려대학교 법학연구원 2021 고려법학 Vol.- No.103

디지털 기술은 노동의 표면적 형태를 바꾸었으나, 노동 통제의 본질은 그대로 유지되기도 한다. 예컨대 PDA, 애플리케이션 등은 플랫폼 종사자의 근무 관련 정보를 실시간으로 축적할 수 있기에 이를 통한 플랫폼의 평가 및 징계는 기존 근로자에 대한 지휘·감독과 유사한 효과를 갖는다. 이밖에도 디지털 경제 발전으로 인해 새로운 노무제공관계가 등장한 것을 고려할 때, 근로자 혹은 자영업자라는 이분법적 구조의 현행법상 중간적 종속성을 지닌 이들이 충분한 법적 보호를 받지 못한다는 점도 주목하여야 한다. 이들은 노무제공과정에서 기존 근로자만큼의 구체적 지시는 받지 않으나, 근로조건에 관한 결정권이 거의 없는 등의 특성을 보면 자영업자와는 분명한 차이가 있기 때문이다. 따라서 본고는 노동법상 보호의 핵심 요건인 종속성을 기준으로 플랫폼 종사자의 보호 필요성과 현행 노동법상의 지위 체계 및 그에 따른 보호 실태를 살폈으나, 기존 근로자·특수형태근로종사자·노무제공자 개념은 법의 사각지대에 놓인 이들을 보호 범위 내로 온전히 포섭하기 어려웠다. 따라서 본고는 빠르게 변화하는 산업 현실에 대한 유연한 대응을 위해 아래 두 가지를 제안하였다. 기존 근로자와 유사한 정도의 종속성을 가진 플랫폼 종사자를 보호하기 위해서는 노동관계법상 근로자 정의규정 및 판례법리의 수정이 필요하다. 그간 대법원의 근로자 개념 완화 시도는 판단의 일관성이 부족하고 플랫폼의 실질적 지휘·감독을 적극적으로 고려하지 않는 등의 한계가 있었다. 국회에서 논의된 노동관계법 개정안도 대법원이 종합적으로 판단할 때 고려되는 세부 지표 중 하나였던 것을 필수 요건으로 명문화해 오히려 보호대상의 범위를 좁히는 등의 문제가 있었다. 따라서 본고는 미국 입법례를 참고하여 법령상 사용·경제적 종속성 요건을 지금보다는 구체화하되 앞서 논한 부작용은 예방하도록 하고, 독일·ILO 등에서 판단기준으로 삼으며 우리나라 국회에서도 논의된 바 있는 조직종속성 요건을 추가하여 보호 외연을 넓히는 등의 방안을 제안하였다. 한편 기존 근로자보다 종속성이 낮으나 자영업자와는 분명히 구분되는 중간적 종속성을 가진 플랫폼 종사자의 보호 방안으로는 제3지위 신설을 통한 법체계의 재구조화가 필요하다. 현재 산업재해보상보험법 등 일부 법령에서 규정하는 특수형태근로종사자·노무제공자 등의 중간적 지위는 시행령에 열거된 직종만 보호하는 방식을 취한다. 이는 동일 직종이라 할지라도 종속성은 종사자가 사용하는 플랫폼의 통제 정도에 따라 달라지기에 보호 필요성에 차등이 있을 수 있다는 점을 간과하며 시행령상 특정되지 않은 신직종은 법령 개정 전까지 사각지대에 놓여 유연한 보호가 불가하다는 한계가 있다. 그럼에도 그간 국회 입법안은 동일한 방식을 취했으며, 이밖에도 제3지위의 대상 범위를 근로기준법상 근로자 범위보다도 좁히는 오류를 범하거나, 단일한 정의규정으로 제3지위를 신설하면서 노동관계법상 근로자가 아닐 것을 해당 법의 보호 요건으로 요구하여 노동관계법 간 차이로 인해 노동조합법상으로만 근로자로 인정받고 근로기준법상 일부 권리는 여전히 필요로 하는 이들을 보호 범위에서 배제하는 등의 문제가 있었다. 따라서 본고는 프랑스와 독일의 제3지위를 검토하여, 기존 노동법 체계 내에 제3지위를 신설하는 방안을 제안하였다. 종합하면 플랫폼 종사자는 현행법과 판례에 의해서는 충분한 보호를 받지 못하고 있으며, 그간 국회에서의 논의도 이들을 보호하기에는 적절치 않았다. 그러므로 산업 현실 변화로 인한 법적 사각지대의 확대 문제를 근본적으로 해결하기 위해서는 디지털 경제의 특성을 기존 근로자 개념에 반영하고, 일부 직종 범주를 특정하기보다 근로자와 자영업자 사이의 중간적 종속성을 지닌 이들을 포괄할 수 있는 제3지위를 노동관계법에 신설함으로써 노동법상 보호의 핵심 근거인 종속성에 따라 플랫폼 종사자가 적절한 법적 지위로 포섭되게끔 해야 한다. 이로써 노동법의 사각지대를 해소하고 디지털 경제의 부상에 따라 변화하는 노무제공관계 양상에 적절히 대응할 수 있을 것이다. Even though digital technologies have changed the notion of work and increased the flexibility of labour, fundamental problems of labour control still exist. For instance, platforms can figure out performance information of platform workers through PDA or mobile applications minute by minute and evaluate their performances and penalise them based on such information. This type of system is equivalent to the traditional control of employees by employers. Moreover, the emergence of the digital economy created new ways to provide labour, and workers who are in the grey zone between the employees and independent workers are not protected by the law. They are different from employees in that they do not receive specific orders from employers, but they are also different from independent workers since they do not have full control over the economic unit in which they work for. Since the current legal systems do not provide sufficient protection to them, this study suggests two major proposals on the classification of status in employment focusing on the degree of subordination of workers. The concept of an employee in labour laws and its interpretation of the Supreme Court should be changed to legally protect platformdependent (almost the same degree as employees) workers from platforms. The Supreme Court has tried to broaden the extent of employees, but it was not consistent and did not consider the intrinsic characteristics of the platform industry. Bills introduced by the National Assembly are not appropriate in that they inadvertently reduce the range of employees. Thus, like the examples of the State of California, clarifying the degree of subordination of an employee to the control of an employer and the degree of economic dependency of an employee in relevant clauses is necessary. Furthermore, the degree of dependency of an employee on the economic unit for an organization―which is used as a criterion in employee classification by Germany and the ILO―should be added to the definition of an employee. These changes will broaden the extent of legal protection for workers who are in need. To properly protect platform workers in the grey area, it is necessary to restructure the legal classification systems of status in employment by introducing a new legal category. Acts including the Industrial Accident Compensation Insurance Act state that only workers serving in certain occupations that are enumerated in the presidential decree can be protected. Unfortunately, the necessary degree of legal protection can differ between workers even if the workers engage in the same occupation. The degree of subordination of platform workers varies depending on how much the platforms control the task of the workers, not by the types of business they work for. Moreover, occupations not mentioned in the decrees cannot be protected by law until the decree is amended. Nevertheless, bills introduced by the National Assembly still restrictively specify the protected occupations. Some bills define a new legal category of labour, but even if workers are classified as having this new status, they cannot be protected by the Trade Union and Labour Relations Adjustment Act. Therefore, a new legal category that applies to the grey area between employee and independent worker, resembling the legal status of workers in German and French laws, should be added to the current labour code.