• Title/Summary/Keyword: Safe life

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Manufacturing of a Treatment Agent for Corrosion Oxides of Iron Relics (철기 유물 부식 산화물 처리제의 제조)

  • Yang, Eun Hee;Han, Won-Sik;Choi, Kwang-Sun;Hong, Tae-Kee
    • Korea Science and Art Forum
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    • v.30
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    • pp.251-261
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    • 2017
  • Metal is a material that has exerted a lot of influence on the development of human cultures, and has closely connected with our life from the past to the present. Types of metal we have used from the prehistoric times are varied, and iron relics take the largest percentage of metal relics excavated in our country. The biggest threat to the existence of iron relics ranging from excavated relics to the ones that are transmitted is the process of corrosion, and physical removal has been used the most for removing corroded oxides. For details for removal of corrosion oxides, this thesis aimed to research on the chemical corrosion oxides remover that protects parent material of iron relics but treats corrosion oxides only. For safe and effective removal of corrosion oxides of iron relics, this study was conducted aiming at finding the possibility of and optimized composition for removal of iron relics corrosion oxides by manufacturing new acid, alkaline and neutral oxides removers and changing their composition variously, exploring the possibility by applying the agents to modern relics. The results of this study are as follows: First, the acid solution removed only some part of corrosive substance oxidized on the surface of metal specimen. Second, the application of each of alkaline and neutral solution resulted in remaining black-colored corrosive substance, but it was removed when the quantity of the solution and the duration of application are increased. Third, All the three solutions did not cause any damage to parent material in the course of application, and showed the result that they are capable of removing unstable oxide layer while protecting parent material and stable corrosive layer as the solutions would be able to deal with situation by a relic only through the control of concentration of solution and duration of application.

Factors Related to Housing Safety and Improved End-of-Life Care for Elderly People (노인의 라이프케어 증진을 위한 주거안전 영향 요인도출)

  • Kim, Ju-Hong;Oh, Myung-Hwa
    • Journal of Korea Entertainment Industry Association
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    • v.13 no.6
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    • pp.341-351
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    • 2019
  • This study examines factors related to the safety of housing for elderly people. Because of the diverse problems that may occur due to aging, elderly residents may have special needs related to housing. To identify relevant factors, first, focus group interviews were conducted with six individuals aged 65 or older. Then, a Delphi survey was conducted on experts; this survey consisted of a questionnaire on factors related to the safety of housing for elderly people. Issues to address in the questionnaire were identified in the focus group interviews and also through an examination of literature published domestically and overseas. In the Delphi survey, opinions were collected from the experts; these opinions were then revised, collated, and analyzed. The factors identified in these steps were verified using a content validity index. As a result, a total of seven primary factors - outdoor environment, entrance, indoor environment, living room, bedroom, kitchen, bathroom, and restroom - and 23 sub-factors related to elderly people's housing safety were identified. The most frequently mentioned factors were indoor and outdoor stairs, safe flooring materials, and indoor thresholds. It is essential to identify the factors that most affect the safety of elderly people in their residences.

The Effect of Indoor Wood Environment on Depression and Anxiety (실내 목재환경이 우울 및 불안에 미치는 영향)

  • Park, Yena;Hwang, Jihyun;Chae, Jeong-ho
    • Anxiety and mood
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    • v.18 no.2
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    • pp.56-64
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    • 2022
  • Objective : Creating a psychologically stable indoor environment is a significant factor in modern life. This study was conducted to confirm which type of wood interior decorating environment was beneficial for improving depression and anxiety. Methods : A total of 59 participants will randomly assign to each accommodation by dividing the rest of the three setting with the same structure with 0% wood interior decorating environment, 45% wood environment, and 90% wood environment. The Psychological evaluation measured at three time points, was before exposure to the wood environment (T1), 45 minutes after exposure to the wood environment (T2), and 20 hours after exposure to the wood environment (T3). Results : As a result of examining the effect of the wood interior use ratio on psychological variables, After about 20 hours (T3), there were significant differences in mood state_vigor-activity(𝛘2=7.253, p<0.05), mood state_tension-anxiety (𝛘2=7.041, p<0.05), mood state_anger-hostility(𝛘2=8.318, p<0.05), and state anxiety (𝛘2=7.680, p<0.05). State anxiety also showed a significant difference in T2 (𝛘2=8.811, p<.05). As a result of analyzing the effect on satisfaction and subjective impression, there was a significant difference in satisfaction (𝛘2=6.300, p<0.05) and 'pleasant (𝛘2=6.930, p<0.05), airy (𝛘2=6.628, p<0.05), masculine (𝛘2=6.906, p<0.05), ordinary(𝛘2=6.662, p<0.05), natural (𝛘2=13.924, p<0.001), calm (𝛘2=13.106, p<0.001), safe (𝛘2=7.755, p<0.05)'. Conclusion : The wood interior decorating environment had a positive effect on anxiety and mood, such as lowering depressive and anxious mood and increasing positive changes and as the ratio of wood decoration increased, it had a greater positive effect on emotions.

Reflection on the Thinking System of Buddhist Philosophy and Daesoon Philosophy (불교철학과 대순사상의 사유체계에 대한 일고찰 - 우주관·인간관·이상사회관을 중심으로 -)

  • Lee, Duck-Jin
    • Journal of the Daesoon Academy of Sciences
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    • v.20
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    • pp.223-272
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    • 2009
  • Both Daesoon philosophy and Buddhist philosophy have strong aspirations for establishing a world comprised of human-beings. In other words, Daesoon philosophy and Buddhist philosophy put human-beings in the place of 'subject character(主語的 人格)' instead of 'predicate character(述語的 人格).' This is because a human is the master rather than a guest of the universe and the world. In this regard, it is safe to say that both Daesoon philosophy and Buddhist philosophy have a common goal of reaching 'an infinitely open life managed by a human-being, the master.' Daesoon philosophy and Buddhist philosophy also share the idea that everything in the universe is an organistic world that is closely connected, like a network. In this aspect, the two philosophies consider the whole world rather than the individual, and seek ways for people to live together actively while expanding the scope of community to the world. Even if 'the morality of living together (相生)' and 'the realization of mercy(同體大悲)' are completely different languages on the surface, it is not difficult to understand the homogeneity inherent in such expressions. Daesoon philosophy and Buddhist philosophy show endless reliability towards all humans and are declarative and reasonable, but both herald human beings as eligible to become the main characters of the future world and lead to the birth of independent human beings while inducing them to the highest position in the universe by liberating humans from the limitations they find. 'Heaven on Earth' as stated in Daesoon philosophy refers to an ideal society where humans and God harmonize, and God and humans complement each other. Also, the world will achieve political stability and equality, realizing an economically prosperous world. Furthermore, social justice will be realized and cultural and religious conflicts resolved. As humans acknowledge there is a way to live together in a universal nature, the environmental issue no longer becomes the top priority for human beings and a world where the morals of human beings reach the highest level will be established. From the original Buddhist perspective, King Jeonrhyun, the proxy of Buddha, realizes the ideal of Buddhism in the mundane world. The world controlled by King Jeonrhyun can be described as having liberty, equality, peace, justice, prosperity, morality, order, legality, democracy, welfare, etc. Therefore, the ideal Buddhist world is materially prosperous, physically healthy and socially just, as well as a world where moral maturity and mental freedom are achieved.

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Long-Term Clinical and Radiologic Outcomes after Stent-Graft Placement for the Treatment of Late-Onset Post-Pancreaticoduodenectomy Arterial Hemorrhage (췌십이지장절제술 후 발생한 후기 출혈에서 스텐트-그라프트를 이용한 치료의 장기적 임상, 영상의학적 결과)

  • Woo Jin Kim;Chang Ho Jeon;Hoon Kwon;Jin Hyeok Kim;Ung Bae Jeon;Suk Kim;Hyung Il Seo;Chang Won Kim
    • Journal of the Korean Society of Radiology
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    • v.82 no.3
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    • pp.600-612
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    • 2021
  • Purpose To evaluate the long-term radiologic and clinical outcomes of stent-graft placement for the treatment of post-pancreaticoduodenectomy arterial hemorrhage (PPAH) based on the imaging findings of stent-graft patency and results of liver function tests. Materials and Methods We retrospectively reviewed the medical records of nine consecutive patients who underwent stent-graft placement for PPAH between June 2012 and May 2017. We analyzed the immediate technical and clinical outcomes and liver function test results. Stent-graft patency was evaluated using serial CT angiography images. Results All stent-grafts were deployed in the intended position for the immediate cessation of arterial hemorrhage and preservation of hepatic arterial blood flow. Technical success was achieved in all nine patients. Eight patients survived after discharge, and one patient died on postoperative day 28. The median follow-up duration was 781 days (range: 28-1766 days). Follow-up CT angiography revealed stent-graft occlusion in all patients. However, serum aspartate aminotransferase or alanine aminotransferase levels in all patients were well below those observed in hepatic infarction cases. Conclusion Stent-graft placement is a safe and effective treatment method for acute life-threatening PPAH. Liver function and distal hepatic arterial blood flow were maintained postoperatively despite the high incidence of stent-graft occlusion observed on follow-up CT.

Theoretical analysis of erosion degradation and safety assessment of submarine shield tunnel segment based on ion erosion

  • Xiaohan Zhou;Yangyang Yang;Zhongping Yang;Sijin Liu;Hao Wang;Weifeng Zhou
    • Geomechanics and Engineering
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    • v.37 no.6
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    • pp.599-614
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    • 2024
  • To evaluate the safety status of deteriorated segments in a submarine shield tunnel during its service life, a seepage model was established based on a cross-sea shield tunnel project. This model was used to study the migration patterns of erosive ions within the shield segments. Based on these laws, the degree of deterioration of the segments was determined. Using the derived analytical solution, the internal forces within the segments were calculated. Lastly, by applying the formula for calculating safety factors, the variation trends in the safety factors of segments with different degrees of deterioration were obtained. The findings demonstrate that corrosive seawater presents the evolution characteristics of continuous seepage from the outside to the inside of the tunnel. The nearby seepage field shows locally concentrated characteristics when there is leakage at the joint, which causes the seepage field's depth and scope to significantly increase. The chlorine ion content decreases gradually with the increase of the distance from the outer surface of the tunnel. The penetration of erosion ions in the segment is facilitated by the presence of water pressure. The ion content of the entire ring segment lining structure is related in the following order: vault < haunch < springing. The difference in the segment's rate of increase in chlorine ion content decreases as service time increases. Based on the analytical solution calculation, the segment's safety factor drops more when the joint leaks than when its intact, and the change rate between the two states exhibits a general downward trend. The safety factor shows a similar change rule at different water depths and continuously decreases at the same segment position as the water depth increases. The three phases of "sudden drop-rise-stability" are represented by a "spoon-shaped" change rule on the safety factor's change curve. The issue of the poor applicability of indicators in earlier studies is resolved by the analytical solution, which only requires determining the loss degree of the segment lining's effective bearing thickness to calculate the safety factor of any cross-section of the shield tunnel. The analytical solution's computation results, however, have some safety margins and are cautious. The process of establishing the evaluation model indicates that the secondary lining made of molded concrete can also have its safety status assessed using the analytical solution. It is very important for the safe operation of the tunnel and the safety of people's property and has a wide range of applications.

Placement of a Subclavian Tunneled Hemodialysis Catheter with the Patient's Arm Raised May Reduce the Risk of Complications: Two Cases Report (쇄골하정맥을 통한 매립혈액투석카테터 삽입시 상지 거상법의 유용성: 2예 보고)

  • Jimin Yoo;Dong Jae Shim;Doyoung Kim;Seung Hwan Baek;Chang Suk Park;Jeong Whee Lee
    • Journal of the Korean Society of Radiology
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    • v.84 no.2
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    • pp.477-482
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    • 2023
  • The subclavian vein is an uncommon route for tunneled hemodialysis catheter (tHDC) placement because of its potency for future dialysis access. However, when favored access routes have been exhausted because of repeated catheterization or limited life expectancy, the subclavian vein can be used for urgent hemodialysis. A subclavian catheterization has a technical problem. The subclavian vein often forms a right angle with the vena cava, and advancing stiff peel-away sheath can cause a vascular injury. However, raising the patient's arm can alter the position of the guidewire and, therefore, change the angle of the vein favorable for tHDC placement. Herein, we report two patients who underwent subclavian catheterization; one experienced an injury to the superior vena cava after undergoing the conventional procedure, whereas the other patient with raised arm during the catheterization procedure had safe catheter placement.

The Direction of Home Economics Education(HEE) Curriculum for Improving Relationship Competency of Korean Youth (청소년의 관계형성역량 향상을 위한 가정과교육의 방향 탐색)

  • Shim, Jaeyoung;Choi, Saeeun
    • Journal of Korean Home Economics Education Association
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    • v.36 no.1
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    • pp.1-18
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    • 2024
  • The purpose of this study is to explore the direction of home economics education and provide specific implications to help adolescents develop relationship competency. For this purpose, the contents of Korea's character education and UK's relationships education curriculum were analyzed, and the results are as follows. Character education in Korea focused on character education values such as responsibility, respect, consideration, and communication throughout the public education system. These contents were largely consistent with the learning content elements for cultivating relationship-competency in home economics education. UK's relationships education at the primary and secondary levels were similar to that of home economics education in middle school in Korea in its goals and learning contents for understanding and maintaining healthy relationships. However, differences existed in areas of safe relationships, setting boundaries with others, comprehensiveness of sex education content, rights to refuse sex education, and education content based on equal rights. Based on these results, this study concludes that the concept of education on relationships needs to be defined, the composition of educational content should be systematically developed, and further research on the development of teaching and learning methods and learning programs that can elicit and internalize students' attitudes and changes is needed. In addition, insights were gained regarding additional educational contents and considerations to take into account.

Exploring the Priorities of Housing Needs to Address Safety Inequality and Enhance Settlement Stability for Young Adults: Focusing on Regional Discrimination (Stigma) or Gender Difference (Deficiency Needs) (청년주거의 안전 불평등 해소 및 정주성 제고를 위한 주거 욕구 우선순위 탐색: 지역차별(낙인효과)과 성별(결핍욕구)을 중심으로)

  • Gim, Tae-Hyoung Tommy;Lee, Jiwon;Kim, Jiyeon
    • Journal of the Korean Regional Science Association
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    • v.40 no.3
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    • pp.3-21
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    • 2024
  • A safe residential environment enhances the quality of human life and promotes community development through self-actualization. It significantly affects regional stability by influencing the physical and psychological environment necessary to satisfy basic needs, providing a sense of security and alleviating anxiety. Safety is a major housing need; however, current housing policies tend to focus predominantly on housing supply. This emphasis limits the fulfillment of higher-level needs due to poor housing conditions and housing cost burdens faced by young households. Therefore, this study aims to identify areas affected by the stigma effect by analyzing the discrepancy between perceived crime risk and actual crime occurrence among single-person young households. The study compares these stigmatized areas with regions where the perceived crime risk is lower than the actual crime occurrence to identify differences in housing needs satisfaction and to prioritize policy interventions. Additionally, the study examines differences in housing needs satisfaction and importance based on gender to inform policy priorities. By considering the stigma effect on regional housing needs and gender-specific deficiencies, this study provides significant policy implications.

Optimized Controlled Atmosphere Regimen for Storage of Fresh Fischer's Ligularia (Ligularia fischeri Turcz.) Leaves (신선 곰취(Ligularia fischeri Turcz.) 잎 저장을 위한 CA 조성 최적화)

  • Park, Yoon-Moon;Kim, Taewan;Kim, Hyun-Seok;Kim, Tae Hoon;Park, Yoo Jin
    • Horticultural Science & Technology
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    • v.33 no.3
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    • pp.375-382
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    • 2015
  • A controlled atmosphere (CA) regimen was optimized during 3 consecutive harvest seasons as the basis of practical modified atmosphere packaging (MAP) storage for quality maintenance and extension of storage potential of fresh Ligularia fischeri leaves. Leaves were harvested in April or May and forced-air cooled to $4^{\circ}C$ before punch-hole MAP (control, where gas concentrations were same as air) and CA treatments. CA regimens adjusted stepwise during 3 experimental years were: 1 and 3% $O_2$, respectively combined with 5 and 10% $CO_2$ in the first year, 3% $O_2$ fixed in combination with 0, 2.5, and 5% $CO_2$ in the second year, and 3% $O_2$ fixed in combination with 2.5 and 5% $CO_2$ in the third year. In the first year, higher incidence of black discoloration was observed with the reduction of respiration under 10% $CO_2$ CA conditions regardless of $O_2$ levels at 1 or 3%. In the second and third year, the incidence of the disorder seemed not to be clearly relevant to CA conditions showing slightly higher incidence only after 4- or 5-week storage + 5-day shelf life. Although texture and appearance quality were maintained better under the 3% $O_2$ + 2.5% $CO_2$condition after 4-week storage + 5-day shelf life, effects of CA on the extension of storage period was slight. Overall results indicated that Ligularia fischeri leaves are very susceptible to $CO_2$ injury. $CO_2$ concentration should be adjusted below 2.5% for safe and effective CA or MAP storage to maintain quality even during short-term storage.