• Transactions of the Korean Society of Automotive Engineers
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• v.13 no.2
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• pp.101-107
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• 2005

In this paper, optimized operating parameters were found using multi-dimensional engine simulation software (KIVA-3V) and micro-genetic algorithm for heavy duty diesel engine. The engine operating condition considered was at 1,737 rev/min and 57 % load. Engine simulation model was validated using an engine equipped with a high pressure electronic unit injector (HEUI) system. Three important parameters were used for the optimization - boost pressure, EGR rate and start of injection timing. Numerical optimization identified HCCI-like combustion characteristics showing significant improvements for the soot and $NO_X$ emissions. The optimized soot and $NO_X$ emissions were reduced to 0.005 g/kW-hr and 1.33 g/kW-hr, respectively. Moreover, the optimum results met EPA 2007 mandates at the operating point considered.

• Korean Journal of Child Studies
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• v.26 no.4
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• pp.35-53
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• 2005

The attachment of Korean infants with their mothers was analyzed by individual attachment and interaction behaviors. The Strange Situation was used with 35 12- 18-month-old infants. Results were similar to the findings of Ainsworth et al(l978), in that exploratory and attachment behavior systems of Korean infants changed depending on separation with their mothers. Then again we could discover the orginal attachment characteristics of Korean infants. Korean infants showed meaningful differences in individual attachment and interaction behaviors from the second separation(episode 6), and the difference between attachnet type were also definite from the second separation. Also, the recovery of exploratory behavior from episode 7 with the advent of a stranger was a distinguishable characteristic compared to Ainsworth et al(l978). This empirical evidence mandates the inclusion of episodes 6 in future studies on attachment of Korean infants.

• Proceedings of the Korean Reliability Society Conference
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• 2005.06a
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• pp.385-392
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• 2005

The restriction of the use of hazardous substances in electrical and electronic equipment legislation mandates the substitution of lead and other hazardous substances in electronics products by July 2006. Due to this legislative pressure, the electronics industry is moving to adoption of lead free solders. In this paper, we investigated a flux to restrict generating electrochemical migration in lead-free solder. The lead-free solders used in this study were Sn-0.7Cu-0.01P and Sn-3.0Ag-0.5Cu. To measure the resistance of electrochemical migration, the dew-cycle test and water drop test were adopted. As the result, now flux having high durable of electrochemical migration was developed.

• Journal of Preventive Medicine and Public Health
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• v.52 no.4
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• pp.272-275
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• 2019

The 2018 National Guideline for Tuberculosis Control, which was published by the Korea Centers for Diseases Prevention and Control (KCDC), mandates conducting an epidemiological survey among close contacts of active tuberculosis patients at public institutions such as schools. In the procedure for these surveys, the tuberculin skin test (TST) is mandated as the screening test for latent tuberculosis infection in elementary school students. However, several guidelines recommend using the interferon-gamma releasing assay (IGRA) for contacts aged over 5 years with a Bacillus Calmette-$Gu{\acute{e}}rin$ vaccination history. The main reason for this is that IGRA has a higher specificity and lower false positive rate than TST. In addition, IGRA requires only a single visit to draw blood and the results are available within 24 hours. These advantages could promote cooperation from both parents and students in conducting these surveys. Thus, these findings regarding the benefits of IGRA for surveys of close contacts at elementary schools should be incorporated into the KCDC guideline.

• Kosin Medical Journal
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• v.33 no.2
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• pp.141-149
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• 2018

Hot flush (hot flush or facial flush) is the most frequent symptom experienced by women of peri-menopausal age. It may appear on women or even men after surgery or chemotherapy. Hot flush is one of the biggest reason for women to undergo hormone replacement therapy (HRT). It also crucially affects various aspects of life quality such as occupation, social life, daily routine and health awareness. The most effective and fundamental remedy for hot flush is HRT. However, a few women is not responsive to HRT and investigation to elucidate other causes of hot flush is warranted, especially in elderly. The contraindications such as breast cancer mandates other modality of treatment. Variety of treatment for hot flush other than HRT will be discussed herein.

• Archives of Plastic Surgery
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• v.49 no.3
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• pp.319-323
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• 2022

Total eyelid defect comprises full-thickness loss of both upper and lower eyelids in a patient. It is a rare and devastating condition with serious implications related to vision, which mandates early and functional reconstruction when associated with intact globe. The primary goal is to give a stable coverage for orbital protection but at the same time provide a functional reconstruction of the defect, to allow for adequate mobility of the eyelids so that the patient's vision is restored to normal with minimal disability. When the defect is massive, and in the absence of loco-regional flaps, microvascular tissue transfer is needed. In this report we describe a radial-artery-based microvascular tissue transfer with a unique innovation utilizing the contralateral frontalis muscle to reconstruct a case of unilateral total upper and lower eyelid loss.

• American Studies
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• v.42 no.1
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• pp.1-22
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• 2019

This paper suggests a genealogy of romance in Chang-rae Lee's Native Speaker, A Gesture Life, and The Surrendered. A flexible textual performance and literary strategy spanning issues of beauty and love, romance in Lee registers the writer's distinctive diasporic negotiation with sites of departure and arrival, in particular with traumatic histories of the m/other country. Native Speaker resolves the crisis of public immigrant love within the compromise in the domestic melodrama. As Lee turns to the scenes of historical trauma in the twentieth century transpacific, romance becomes a key strategy through which his aestheticized framing and deframing of comfort woman is performed and the Korean War finds odd comfort in the aesthetic energy of perverse care in Italy. Through the dehistoricizing movement outside of the historical into the realm of myth and nostalgia, Lee's diasporic romance breaks away from mandates of representation and works within the excess of mistranslation.

• Journal of Environmental Health Sciences
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• v.46 no.6
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• pp.750-756
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• 2020

Objectives: After coronavirus disease 2019 (COVID-19) was declared a pandemic, the South Korean government announced guidelines on wearing masks to prevent its spread. The guidelines have changed depending on the severity of the spread of COVID-19. This study aimed to identify mask-wearing behaviours to counter the spread of COVID-19 in indoor and outdoor environments. Methods: The type of mask worn and proper wearing were observed in cafés, supermarkets, underground shopping malls, and streets in Seoul. Behavioral assessment was repeated in August at social distancing levels 1 and 2, in October at social distancing level 1, and in November after the mask mandates. Results: In August, 22.1% of subjects in cafés, 90.8% in supermarkets, 91.8% in underground shopping malls, and 83.6% on outdoor streets wore masks properly. In October, the proportion of correct wearers increased in all locations. After masks became mandatory in November, about 97% of users of supermarkets, underground shopping malls, and streets wore masks properly. In cafés, the proportion of proper wearers was 61.5% with both social distancing level 2 in August and the mandate in November. The number of KF-certified mask wearers continued to increase from August to November. Conclusion: This study investigated mask-wearing behaviors to counter COVID-19 through observations in indoor and outdoor places in Seoul. Mask-wearing behavior was different depending on the place and the government guidelines in place. The results could be used for evaluation of the current guidelines for COVID-19.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.17 no.2
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• pp.79-90
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• 2006

Social deficits are the most critical and core deficits of the children with Autistic Spectrum Disorder(ASD) and they are qualitatively as well as qualitatively different from typically developing children. It is proposed that the attachment between the mother and the autistic child should be promoted foremost and early as possible, to improve social deficits, just like early social developments in normal children depend largely on interactions between the mother and the child who are attached to each other we have developed an interventional program, 'Attachment Promotion Therapy', largely based on the attachment theory. The Attachment promotion Therapy mandates the participation of both the mother and the autistic child, and consists of mutually enjoying play activities, close physical contacts and parental training on intense mother-child interactions, focusing on improving maternal sensitivity, responsiveness, and nurturing behaviors during their interactions. The program was found to be effective in improving attachment behaviors, attachment security and acquiring joint attention skills. Attachment Promotion Therapy is therefore proposed here as the important earliest intervention method for children with ASD and could become the base for many other educational and therapeutic interventions.

• International Journal of Internet, Broadcasting and Communication
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• v.12 no.1
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• pp.7-13
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• 2020

We describes V2X technology, a connectivity-based recognition technology that is attracting attention as a key technology for implementing autonomous driving technology, and autonomous communication modules that implement ADAS technology, a sensor-based recognition technology. It also explains the trends in V2X technology standardization centered on IEEE 802.11p, which is a WAVE technology standard based on Wi-Fi/DSRC. Finally, we will discuss the market growth trend of V2X communication modules in the United States, the leading V2X technology module, and the development of technology development trends of major domestic and international companies that are leading the global technology market related to V2X communication modules. V2X and ADAS technologies will be the biggest influence on automotive purchasing decisions. In recent years, V2I mandates have been promoted beyond V2V, mainly in developed countries such as the United States. The related industry needs to focus on the development of information transmission network technology that can support high frequency high efficiency(transmission rate) and sophisticated positioning accuracy beyond conventional vehicle communication.