Seoul has installed mechanical air filters in the heating, ventilation, and air conditioning (HVAC) systems of city buses to improve their indoor air quality since late 2019. We evaluated particle removal efficiencies of the filter in a wind tunnel, and clean air delivery rates (CADRs) of the systems and a household air purifier in the buses, following the test standards. The filter showed the efficiencies of 91% and 97.6%, 88% and 97.9%, and 78% and 95.2% for 0.35 μm particles and PM2.5 at 1.0m/s, 1.5m/s, and 2.0m/s, respectively. The efficiencies rose with an increase in the particle size and the filters had a minimum efficiency reporting value (MERV) rating of 15. The CADRs for PM2.5 and flow rate of the systems were 12.7m3/min and 17.9m3/min, 16.6m3/min and 25.4m3/min, 18.7m3/min and 33.6m3/min, and 23.3m3/min and 47.1m3/min on the operation mode of 1, 2, 3, and 4, respectively. The CADRs of the systems were 3.8-7.1 times higher than those of the air purifier, but single-pass removal efficiencies of the former were 0.56-0.81 lower than those of the latter.

In this study, the adsorption/desorption performance of toluene was evaluated using zeolite adsorbent to replace activated carbon with one-off and ignition characteristics. For the proper operation of the VOCs adsorption/desorption and condensate recovery steps, the operating range by various adsorption/desorption temperatures was selected. The adsorbent is a bead-type zeolite, which was put into an adsorption tower of 10 LPM scale. As a result, it was demonstrated that 0.079 mg/g was adsorbed at a low temperature (20°C) during adsorption. In the case of desorption, it was found that VOCs adsorbed on the adsorbent were completely recovered after the desorption operation at 220°C for about 160 minutes. However, in the heating rate step for desorption, it was not possible to maintain an appropriate heating rate by filling the tower with zeolite. This was complemented by applying a copper plate with high thermal conductivity, and it was shown that the time was shortened by about 10 minutes or more. When VOCs are emitted at high concentrations during the desorption process, they can be reused as energy resources through low-temperature maintenance, and a condensation method was attempted. The efficiency of condensing chiller (cooler) with temperature control and liquid nitrogen condensing was compared. It was found that the chiller condensing efficiency increased as the temperature decreased. In the case of liquid nitrogen condensation, the liquid nitrogen temperature was maintained at -196°C, showing a stable efficiency of 90%.

현재 세계적 추세는 동성간 결합관계를 합법화하고 있으나, 아직까지 우리나라에서는 합법화되지 못한 상황이다. 그로 인해 동성결합당사자는 법률적 보호를 받지 못하는 상태에 있다. 이는 민법상 권리의무에서의 배 제나 제한뿐만 아니라, 조세법상 불이익, 형사상의 제한, 사적 조직에서도 많은 제한을 받게 되었다. 이렇듯 한국에서의 동성결합은 인정되지 않으 나, 동성결합을 요구하는 거세지고 사회적 주목을 받는 이슈들이 나타나 고 있는 현 시점에서 본격적 논의의 필요성으로 우리나라와 가까이 있는 동아시아의 국가 중 지방자치단체에서 파트너십제도를 운영하는 일본과 최근 동성혼에 대해 허용한 대만과 태국의 동성혼 합법화에 관한 입법형 태, 그 내용, 과정 등을 살펴보았다. 일본의 경우는 동성혼을 허용하지 않고 있으나, 지자체별로 파트너십제 도를 운영하고, 각 지자체 별로 각기 다른 방식과 내용을 지니고 있다. 그렇지만 최근 여러 입법시도와 판례의 변화 등이 나타나고 있다. 그리고 대만은 지자체 별로 각기 다른 동성반려등록제도가 시행 중에 사법원의 위헌판결로 특별법을 제정하여 동성혼이 합법화되었다. 태국은 시민동반 자법의 제정으로 파트너십제도가 운영되고 있던 중 민상법개정으로 동성 혼이 합법화된 국가이다. 일본과 대만은 파트너십제도가 지자체에서 운영 된 것이고, 태국은 입법에 의하여 운영되고 있다. 그리고 대만의 동성혼 합법화는 위헌판결과로 특별법을 제정한 것이고, 태국은 국회가 민상법을 개정하여 동성혼 합법화를 이룩하였다. 이들 대부분은 인간의 존엄과 가 치, 행복추구권, 혼인의 자유, 평등권을 이유로 사법적 판단과 국회의 결 단을 한 것이다. 한국의 경우는 아직까지 본격적인 입법과 사법적 판단이 없는 상태이나 동성결합 허용에 대한 논의가 시작된 단계로 동성결합에 대한 긍정적인 사회적적 인식과 환경이 나타나면 중간형태인 파트너십제 도를 허용하여 운영하고, 향후 당사자들에게 더 많은 권리의무를 부여할 수 있도록 해야 할 것이다.

As modern society has emerged and developed, the subway has established itself as a representative means of transportation in the city due to its speed, accuracy, and accessibility. According to the Indoor Air Quality Management Act, underground stations have established and managed the maintenance and recommendation standards for PM10, PM2.5, CO2, CO, HCHO, NO2, Rn, VOCs However, th the standards for airborne mold has not been applied for subway stations even though management for the health effect of exposure to mold is necessay. In this study, the correlation with major contributing factors was analyzed by measuring the concentration of airborne molds in the indoor air of underground stations and through literature research. It was confirmed that there was a correlation between the concentration of airborne molds in subway stations and the major contributing factors. As a result of the analysis, it was found that the concentration of airborne molds became higher as the location of the platform became deeper underground, during periods of congestion, and especially in summer. There was no significant correlation with the year of construction. Our findings indicate that appropriate management measures should be devised in response to such contributing factors.

Aralia elata, Chaenomeles sinensis fruit, and Glycyrrhizae radix have been widely used as oriental medicinal plants in Korea, China and Japan and found to possess anti-oxidative and anti-inflammatory activities. The current study was conducted to investigate the neuroprotective effect of an ethanol extract of a mixture of A. elata, C. sinensis fruit, and Glycyrrhizae radix (ACG) against ischemia-induced brain injury in rats and excitotoxic and oxidative neuronal death in primarily cultured rat cortical neurons. Transient focal cerebral ischemia was induced by 2 h middle cerebral artery occlusion followed by 24 h reperfusion (MCAO/R) in rats. Oral administration of ACG (10, 25, and 50 mg/kg) 30 min before MCAO, after 1 h of MCAO, and after 1 h of reperfusion reduced MCAO/R-induced brain infarct and edema formation. ACG also inhibited development of behavioral disabilities in MCAO/R-treated rats. Exposure of cultured cortical neurons to 500 μM glutamate for 12 h resulted in neuronal cell death. ACG (1, 10, and 50 μg/mL) inhibited glutamate-induced neuronal death. Furthermore, ACG inhibited 100 μM hydrogen peroxide (H2O2)- and hypoxia-induced neuronal death. These results suggest that the neuroprotective effect of ACG against ischemia-induced brain damage might be associated with its anti-excitotoxic and anti-oxidative activity and that ACG may have a therapeutic role for prevention of neurodegeneration in stroke.

유럽인권재판소는 개인정보보호와 관련한 판례에서 국가기관이 보유하 는 개인정보가 개인의 사생활 및 가족생활을 존중받을 권리 위반에 해당 하는지 여부를 결정함에 있어서 다음과 같은 기준을 제시한다. 즉, 문제 가 되는 정보가 어떠한 방식으로 수집되고 보유하게 되었는지, 해당 정보 가 녹음되었다면 그러한 녹음이 어떠한 방식으로 사용되고, 결과물이 입 수되었는지와 같은 녹음물의 성질 등 각 사안의 구체적인 정황을 충분히 고려해야 한다는 것이다. ⌜일반정보보호규정⌟(General Data Protecti on Regulation, GDPR)이 유럽연합(EU)에서 통과되어 2018년 5월 25 일자로 발효되었다. 이로써, EU에 있는 사람들과 관련된 정보를 다루거나 수집하는 경우에는 전 세계 어디 있는 기관이라도 정보보호의무를 부담하 며, 사생활보호 기준을 위반하는 경우에 상당한 금액의 과징금이 부과된 다. 이처럼, 세계의 개인정보보호법 발전을 유럽이 주도하고 판결을 통하 여 개인정보보호법 개정을 선도하고 있다. 이러한 시점에서, 유럽인권재판 소의 개인정보보호와 관련한 구체적인 판례에서의 동향을 살펴보는 것은 향후 우리나라 개인정보보호법의 발전 방향을 제시할 수 있다는 점에서 의미 있다고 생각된다. 유럽인권재판소에 개인정보보호와 관련한 여러 회 원국의 사례들이 있음에도 불구하고 우리나라에 많이 소개되지 않았다. 특히 우리나라에서는 개인정보보호법의 개정안이 논의되는 등 개인정보보 호와 관련한 법적 제도 마련에 활발한 논의가 진행 중이다. 그럼에도 불 구하고, 아직 우리나라 법원에 개인정보보호와 관련하여 특히 개인정보의 수집, 저장 및 사용, 공개, 접근 및 삭제와 같이 세부적인 상황에 관한 판 례가 많이 축적되지 않은 실정이다. 이러한 점을 고려한다면 유럽인권재 판소의 개인정보보호와 관련한 여러 회원국의 사례를 통하여 판례 동향을 연구하는 것은 향후 우리나라의 개인정보보호법의 개정 추진과 장차 나오 게 될 법원 판례에 시사점을 줄 수 있을 것이라고 기대한다.

Vitamin K1 (VK1) has been widely used as a coumarin antagonist and for the treatment of hemorrhagic disease in veterinary practice. However, the potential mechanism of adverse reaction after VK1 injection has been not fully elucidated. In this study, two cases of anaphylactic reactions after subcutaneous VK1 injection were presented, and then an experimental study was performed to further characterize the anaphylactic reactions. Two dogs developed anaphylactic reactions after subcutaneous VK1 injections and were promptly treated with antihistamines and glucocorticoids, after which abnormal signs related to anaphylaxis disappeared. Subsequently, a study was undertaken to ascertain the nature of the adverse reactions to subcutaneous VK1 injection. Six healthy laboratory beagle dogs received subcutaneous VK1 administrations once daily for eight days. They were monitored for clinical signs after each injection, and blood samples were collected for the measurement of plasma histamine and immunoglobulin E concentrations using enzyme-linked immunosorbent assay. All six dogs showed mild angioedema after the VK1 injections. The dogs also displayed clinical signs including sneezing, coughing, skin reddening, excess salivation, pawing the ground, and somnolence on days 4, 6, and 8. Plasma histamine and immunoglobulin E concentrations were significantly increased by the repeated injections. In summary, this study describes anaphylactic reactions resulting from subcutaneous VK1 administration in dogs. Clinicians should be aware that the repeated subcutaneous injection of VK1 can trigger an anaphylactic reaction in dogs.

2005년 1월 1일 증권관련집단소송법이 시행된 후 17년이 경과하는 동 안 우리나라에서 제기된 증권관련집단소송은 총 9건이다. 이는 지난 17년 동안 현격히 성장한 주식시장에서 주식불공정거래행위가 날로 증가하고 있는 상황에서 증권관련집단소송제도가 입법취지에 맞게 다수의 소액 투 자자의 권리구제를 위한 제도로 원활하게 이용되지 못하고 있는 것을 보 여주는 것이다. 이 글은 증권관련집단소송제도의 개선방안을 도출하기 위하여 제도의 도입시 입법모델이 되었고 증권집단소송이 현재까지 가장 활발히 이용되 고 있는 미국 증권집단소송의 최근 현황 및 주요 사례를 면밀히 검토해 봄으로써 그 시사점을 찾아보고자 한다. 미국의 증권집단소송의 최근 현황은 과거 20여년간의 증권집단소송 제 기 건수, 소송 관련 회사의 시가총액 변동, 증권집단소송의 청구 원인, 전 체 상장회사 수 대비 피소 회사 수의 비율, 각하․화해 등 증권집단소송의 진행 경과, 종결까지의 경과 시간 추이, 소송허가신청 처리 현황 및 소요 시간, 화해 종결 건 수 및 화해액 등을 기준으로 상세히 분석하였다. 또한 미국 증권집단소송의 주요 사례로는 Enron 사건, WorldCom 사 건, Basic Inc. v. Levinson, Dura Pharmaceuticals, Inc. v. Broudo, Tellabs, Inc. v. Makor Issues & Rights, Ltd. 등 증권집단소송 관련 규정에 대한 중요 해석기준을 제시해 준 사건들을 중심으로 구체적인 사 실관계, 소송의 진행내역, 결과 및 시사점 등을 검토해 보았다.

Purpose: This study explored the reflective experiences of nursing students through online clinical nursing practicum education. Its specific aims were to identify the reflection experiences that these students subjectively perceive as alternative learning for their clinical practicum because of COVID-19 situations and to identify the strengths and weaknesses of these reflective experiences. Methods: In-depth interviews were conducted face-to-face or by phone with 18 fourth-year nursing students from June to October 2021. Data were analyzed using a thematic analysis. Results: The following five themes were identified: (1) looking back and rethinking, (2) applying memories to prepare for the future practicum, (3) requiring efforts to seek and consider real knowledge, (4) using benefits from emotional relaxation and repetition, and (5) limitations of habitual writing without deep thinking. Conclusion: The results of this study suggest the need for the development of an online practical education that vividly reflects the diverse and practical clinical world, which enables the acquisition of new knowledge and changes while actively receiving support, if possible, in the difficult reflection process experienced by nursing students through a mutual communication method involving faculty and students.

Purpose: This study to provide the basic data necessary for developing support policies and intervention programs through an in-depth and integrated exploration of the experiences in the of recovery and social adaptation through therapeutic community of male homeless alcohol dependents. Methods: Data were collected from two participants through an in-depth interviews and were analyzed the life history research suggested by Mandelbaum (1973). This analysis was conducted the perspectives of the life domain, turning point, and adaptation, which are three structured analysis frameworks, beyond the continuity of chronological life history. Results: The results were the dimensions of life that led to alcoholism, turning point where life changed, and adaptation to live for self-realization with new life values while maintaining sobriety. Its content includes the adaptation process. Conclusion: Follow-up studies and activities for an integrated support policy and intervention program should be conducted by reflecting on the problems and intervention strategies raised above.

Purpose: This study aimed to gain an in-depth understanding by analyzing and exploring the work experience of infection control nurses (ICNs) in response to the prolonged COVID-19 pandemic. Methods: Data were collected from 14 ICNs, (two in in-depth interviews and 12 in groups of six) from February 19, 2021, to March 20, 2021, and were analyzed according to the content. Results: In the prolonged COVID-19 pandemic, ICNs took the lead in responding to infectious diseases, where they felt pressure in doing everything. In addition, they were confused by a lack of workforce and undetailed job plans. ICNs have been exhausted by insufficient support and system, such as the lack of support in the hospital, communication with health authorities, and difficulties with patients and visitors. However, ICNs settle with the help and encouragement of those around them. For example, pride in the work that only ICN can do, change in the cooperation of hospitals, and development of ICNs’ unique method of perseverance. Conclusion: During the COVID-19 pandemic, ICNs experienced structural, physical, and mental difficulties at work. Nevertheless, the study found that a driving force enabled ICNs to endure, and that to efficiently respond to new infectious diseases in the future, it is necessary to secure ICNs and strengthen them.

Purpose: This study aimed to understand the impact of nurses’ psychosocial experiences in COVID-19 on their mental health and the psychosocial adjustment and growth of patients with COVID-19. Methods: This study used qualitative content analysis. Data were collected through individual in-depth interviews with 10 nurses with COVID-19 from February 24, 2022, to March 17, 2022. Results: Six themes were identified in the qualitative content analysis, including ‘Psychological burden after diagnosis’, ‘Acceptance of confirmed results’, ‘Difficulties caused by change in an unfamiliar environment’, ‘Confusion after returning to daily life’, ‘Mental state after a complete recovery’, ‘Incomplete prevention of infectious disease and control guidelines’. Conclusion: In the context of the COVID-19 pandemic, the physical and mental health of nurses can have a significant impact on the quality of medical care; therefore, an understanding of their psychosocial adjustment will help support nurses adjust better in future pandemic situations.

Purpose: The purpose of this study was to explore the nurses’ experience of the side effects of COVID-19 vaccination and understand its meaning. Methods: This study was a qualitative study using the content analysis method. The data collection period using a focus group was from October 26, 2021 to January 23, 2022. Results: The themes included: “Pressure from mandatory COVID-19 vaccination”, “Feeling relieved because the side effects are mild”, “Severe vaccine side effects cause negative emotions”, “Tolerating side effects and coping personally”, “Confusion and alienation about insufficient coping of side effects”, “Feeling skeptical about the COVID-19 vaccination policy”, “Thinking about how to build trust in the COVID-19 vaccine”. Conclusion: In the future, it is considered important to establish scientific evidence through continuous monitoring and data collection of the side effects of COVID-19 vaccination and to build trust in vaccines through transparent information disclosure.

Purpose: This study aimed to understand the COVID-19 vaccination experience of nursing students and explore its importance. Methods: A descriptive qualitative study and content analysis was conducted. The participants were 14 nursing students who expressed their rejection of COVID-19 vaccination. Data were collected through in-depth interviews from November 24, 2021, to January 30, 2022. Results: The COVID-19 vaccination experience of nursing students included four themes: “nostalgia for everyday life before COVID-19”, “hesitancy to get vaccinated against COVID-19”, “different thoughts about COVID-19 vaccination”, and “future direction of COVID-19 vaccination”. Conclusion: The COVID-19 vaccination experience of nursing students may be due to a lack of trust in COVID-19 vaccination. Therefore, accurate information about COVID-19 vaccination should be provided to lower the vaccination hesitancy of nursing students.

Purpose: This study was conducted to identify the experiences of families caring for patients with home mechanical ventilation. The question was, “What is the caregiving experience of a family who has a member with home mechanical ventilation?”. Methods: This study was a qualitative study to explore and describe the implications of experiences of families caring through a phenomenological approach. One-on-one in-depth interviews were conducted with family caregivers who worked as full-time for caring for patients with home mechanical ventilation, and the results were analyzed using Colaizzi’s (1978) phenomenological method. Participants’ relationships to patients were 1 spouse, 1 father, and 6 mother. The ages of the participants were between 33 and 59, with an average of 45.1. Results: In this study, family members’ caregiving experience was emerged. Analysis revealed the following themes: Felt burdened but had to accept it; Seized by fear; The weight I must bear alone; Everything is difficult and unfamiliar; Still, my home; and Sorry for the other family members. It was found that caregivers had decided to discharge their loved ones from the hospital out of a sense of duty. Conclusion: The families took care of the patients with responsibility and love. The study results should help with the understanding of a family with a member with home mechanical ventilation and should be used to develop nursing, mediating, and consulting programs for these caregivers

Corrosion is a natural, inevitable process, and is one of the world's most serious problems. Losses incurred due to corrosion are extremely expensive for society. Several technological strategies have been explored and implemented to address these losses. The use of inhibitors to prevent corrosion is a common and efficient method to reduce corrosion losses. This review covers Al and Al-composite corrosion inhibitors in chloride-containing solutions, because of their popularity in a broad array of industrial applications. A vast number of studies in the literature detail the common tendency of Al and Al-composites with reinforcements to deteriorate. Accordingly, it is worthwhile to employ inhibitors to protect them, as discussed in the present work. The emphasis is on selecting the smartest corrosion inhibitor and evaluating its performance. According to the study, the most commonly used corrosion inhibitors are 1,4-naphthoquinone (NQ), 1,5-naphthalene diol, 3-amino-1,2,4-triazole-5-thiol (ATAT), ammonium tetrathiotungstate, clotrimazole, amoxicillin, antimicrobial and antifungal drugs. Electrochemical impedance spectroscopy (EIS), potentiodynamic (PDP), and weight loss were among the most commonly used modern electrochemical technologies to test inhibitors’ efficacy under environmental conditions.

In this study, N/S co-doped carbon felt (N/S-CF) was prepared and characterized as an electrode material for electric double-layer capacitors (EDLCs). A commercial carbon felt (CF) was immersed in an aqueous solution of thiourea and then thermally treated at 800 oC under an inert atmosphere. The prepared N/S-CF showed a large specific surface area with hierarchical pore structures. The electrochemical performance of the N/S-CF-based electrode was evaluated using both 3- electrode and 2-electrode systems. In the 3-electrode system, the N/S-CF-based electrode showed a good specific capacitance of 177 F/g at 1 A/g and a good rate capability of 41% at 20 A/g. In the 2-electrode system (symmetric capacitor), the freestanding N/S-CF-based electrode showed a specific capacitance of 275 mF/cm2 at 2 mA/cm2, a rate capability of 62.5 % at 100 mA/cm2, a specific power density of ~ 25,000 mW/cm2 at an energy density of 23.9 mWh/cm2, and a cycling stability of ~ 100 % at 100 mA/cm2 after 20,000 cycles. These results indicate the N/S co-doped carbon felts can be a promising candidate as a new electrode material in a symmetric capacitor.

Ti3C2Tx MXene, which is a representative of the two-dimensional MXene family, is attracting considerable attention due to its remarkable physicochemical and mechanical properties. Despite its strengths, however, it is known to be vulnerable to oxidation. Many researchers have investigated the oxidation behaviors of the material, but most researches were conducted at high temperatures above 500 oC in an oxidation-retarding environment. In this research, we studied changes in the structural and electrical properties of Ti3C2Tx MXene induced by low-temperature heat treatments in ambient conditions. It was found that a number of TiO2 particles were formed on the MXene surface when it was mildly heated to 200 oC. Heating the material to higher temperatures, up to 400 oC, the phase transformation of Ti3C2Tx MXene to TiO2 was accelerated, resulting in a TiO2/ Ti3C2Tx hybrid. Consequently, the metallic nature of pure Ti3C2Tx MXene was transformed to semiconductive behavior upon heat-treating at ≥ 200 oC. The results of this research clearly demonstrate that Ti3C2Tx MXene may be easily oxidized even at low temperatures once it is exposed to air.

Porous ceramics have the advantages of low density, low thermal conductivity, and excellent mechanical properties. Among porous ceramic manufacturing methods, the replica template method allows the easy manufacturing of porous filters with the highest porosity and pores of the desired size, but it also has the disadvantage that the resulting filters have low mechanical strength. To overcome this shortcoming, mullite (3Al2O3·2SiO2) whiskers, which have excellent thermal stability and high mechanical strength, were introduced in porous ceramic structure. The mullite whiskers were synthesized using a composition of Al2O3, flyash and MoO3. The morphologies and crystal structures of the mullite whiskers with MoO3 contents were investigated in detail. When the porous ceramic with mullite whiskers was fabricated using 20 wt% MoO3 catalyst the most uniform microstructure was obtained, and the mullite whiskers showed the highest aspect ratio of 47.03. The porosity and compressive strength of the fabricated porous ceramic were 82.12% and 0.83 MPa, respectively.

Transparent thin films of pure and nickel-doped ZrO2 are grown successfully by sol-gel dip-coating technique. The structural and optical properties according to the different annealing temperatures (300 oC, 400 oC and 500 oC) are investigated. Analysis of crystallographic properties through X-ray diffraction pattern reveals an increase in crystallite size due to increase in crystallinity with temperature. All fabricated thin films are highly-oriented along (101) planes, which enhances the increase in nickel doping. Scanning electron microscopy and energy dispersive spectroscopy are employed to confirm the homogeneity in surface morphology as well as the doping configuration of films. The extinction coefficient is found to be on the order of 102, showing the surface smoothness of deposited thin films. UV-visible spectroscopy reveals a decrease in the optical band gap with the increase in annealing temperature due to the increase in crystallite size. The variation in Urbach energy and defect density with doping and the change in annealing temperature are also studied.