• 새물리
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• 제68권11호
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• pp.1268-1274
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• 2018

항공장애등이란 비행 중인 조종사에게 건축물이나 위험물의 존재를 알리기 위해 사용되는 등화를 말한다. 현재 대부분의 항공장애등의 광원은 발광다이오드(light-emitting diode, LED)로 대체되었고, 급격하게 확장 및 보급되었으나, 설치된 항공장애등이 광학적 성능 기준을 충족하지 못하여 항공 수송기기의 충돌 사고를 유발하고 있으며, 이러한 이유로 항공 안전상의 위험에 노출되어 있는 실정이다. 이러한 문제를 해결하기 위하여 본 연구에서는 $360^{\circ}$ 방향에서 동일한 광도 분포를 가지고, LED 광원에서 나오는 광선을 좁은 빔(beam) 발산각으로 시준할 수 있는 프레넬 렌즈(fresnel lens)를 각각의 비구면 조각의 집합 (array) 형태로 설계를 하였다. 그 후에, 렌즈 기울기(tilt), LED와 프레넬 렌즈 사이의 거리를 최적화하여 중심 광도 20,000 cd, $3^{\circ}$ 이상의 수직 빔 발산각을 구현하는 항공장애등 광학계 설계와 시뮬레이션을 진행하였다.

• 영미문화
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• 제14권2호
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• pp.251-285
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• 2014

Monsters cannot speak. They have been objectified and represented through a particular concept 'monstrosity' that renders the presence of monsters effectively simplified and nullified. In contemporary monster narratives, however, the site of monsters reveals that they could be the complex construction of society, culture, language and ideology. As going into the structure that concept is based on, therefore, meanings of monsters would be seen to be highly unstable. When symbolic language strives to match monsters with a unified concept, their meanings become only further deferred rather than valorized. This shows the language of monsters should disclose the self-contradiction inherent in 'monstrosity,' which has made others—namely beings we define as 'different' from ourselves in culture or physical appearance—embodied as abject and horrifying monsters. Unable to be understood, accepted, or called humans. I analyse Frankenstein and Dracula that firmly converge monstrous bodies into a symbolic meaning, demonstrating how this fusion causes problems in the multicultural society. I especially emphasize the undeniable affirmation of expurgated others we need to have empathetic relations with, because their difference, unfamiliarity, and slight divergences are likely to be defined as abnormalities. In the multicultural society, thus, we must learn to embrace diversity, while also having to recognize there are many others that have been thought of as monsters; ironically enabling us to think about an undeniable imperative of being responsive to other people. In this respect, the monstrous inhuman goes to the heart of the ethical undercurrent of multiculturalism, its resolute attempt to recognize and respect someone else's difference from me. A focus on empathetic relations with others, thus, can strengthen the process of creating social mechanisms that do justice to the competing claims of different cultural groups and individuals.

• 정보보호학회논문지
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• 제21권5호
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• pp.109-127
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• 2011

모바일 오피스란 PC위주의 사무범위를 벗어나 장소와 단말에 구애를 받지 않고 휴대용 단말을 이용하여 언제 어디서나 네트워크에 접속하여 업무를 수행하게 하는 새로운 근무형태이다. 스마트폰의 보급과 확산, 유비쿼터스시대의 망고도화, 무선인터넷 확대 등 모바일 오피스의 환경을 이루는 요소들의 발달과 국가의 스마트워크 활성화 정책에 반해, 모바일 오피스라는 새로운 환경에서의 보안위협들에 대한 보안 가이드라인과 정책 등이 미흡한 상황이다. 본 논문에서는 안전한 모바일 오피스 구축을 위해 요구되는 보안 대응으로써, 이미 구축된 보안대응시스템인 CERT와 ISAC의 기능을 분석, 활용하여 스마트 모바일 오피스 보안 강화를 위한 CERT와 ISAC의 역할을 제시하고자 한다.

• Journal of Ginseng Research
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• 제45권3호
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• pp.456-463
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• 2021

Background: Keratinocytes form a physical barrier and act as an innate immune cell in skin. Keratinocytes secrete pro-inflammatory cytokines, such as interleukin (IL)-1β, resulting from inflammasome activation when exposed to ultraviolet (UV) irradiation. Korean Red Ginseng extracts (RGE) have been well-studied as modulators of inflammasome activation in immune cells, such as macrophages. In the study, we elucidated the role of RGE on the UV-mediated inflammasome activation in keratinocytes compared with that in macrophages. Methods: Human skin keratinocyte cells (HaCaT), human epidermal keratinocytes (HEK), human monocyte-like cells (THP-1), and mouse macrophages were treated with RGE or a saponin fraction (SF) or non-saponin fraction (NS) of RGE before and after UV irradiation. The secretion levels of IL-1β, as an indicator of inflammasome activation, were analyzed. Results: The treatment of RGE or SF in macrophages after UV irradiation inhibited IL-1β secretion, but similar treatment in HaCaT cells did not. However, the treatment of RGE or SF in HaCaT cells in the presence of poly I:C, a toll-like receptor (TLR) 3 ligand, before UV exposure elicited the inhibition of the IL-1β secretion. The inhibition was caused by the disruption by RGE or SF of the TLR mediating up-regulation of the pro-IL-1β and NLRP3 genes during the priming step. Conclusion: RGE and its saponins inhibit IL-1β secretion in response to UV exposure in both keratinocytes and macrophages. In particular, RGE treatment interrupted only the priming step in keratinocytes, although it did attenuate both the priming and activation steps in macrophages.

• International Journal of Computer Science & Network Security
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• 제21권6호
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• pp.47-53
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• 2021

The article deals with the problems of application of microwave methods in systems of geoecological monitoring of natural environments and resources of the agro-industrial complex. It is noted that the methods of microwave radiometry make it possible, by the power of the measured intrinsic radio-thermal radiation of the atmosphere, when solving inverse problems using empirical and semi-empirical models, to determine such parameters of the atmosphere as thermodynamic temperature, humidity, water content, moisture content, precipitation intensity, and the presence of different fractions of clouds.In addition to assessing the meteorological parameters of the atmosphere and the geophysical parameters of the underlying surface based on the data of microwave radiometric measurements, it is possible to promptly detect and study pollution of both the atmosphere and the earth's surface. A technique has been developed for the analysis of sources of measurement error and their numerical evaluation, because they have a significant effect on the accuracy of solving inverse problems of reconstructing the values of the physical parameters of the probed media.To analyze the degree of influence of the limited spatial selectivity of the antenna of the microwave radiometric system on the measurement error, we calculated the relative measurement error of the ratio of radio brightness contrasts in two angular directions. It has been determined that in the system of geoecological monitoring of natural environments, the effect of background noise is maximal with small changes in the radiobrightness temperature during angular scanning and high sensitivity of the receiving equipment.

• 한국콘텐츠학회논문지
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• 제22권6호
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• pp.184-193
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• 2022

최근 빈번히 사용되고 있는 '번아웃'은 치열한 경쟁 속에 사는 현대인들의 심리를 대변하는 대표적인 표현 중 하나다. 본 고에서는 직장인들의 힐링 영화로 손꼽히는 '꾸뻬씨의 행복여행'과 '잠깐만 회사 좀 관두고 올게' 두 편을 번아웃 관점에서 접근, 분석했다. 작품에서 나타난 번아웃의 증상은 무기력증, 짜증, 분노, 불면, 우울, 자살 충동 등이었으며, <꾸뻬씨..>의 경우 반복적인 상담업무에서 오는 가치 충돌이, <잠깐만..>의 경우 업무 과부하와 실적 압박, 동료 커뮤니티의 부재 등이 원인으로 작용하고 있었다. 이러한 번아웃 상태는 등장인물의 대사나 표정은 물론 다양한 사이즈의 부감쇼트와 낮은 조명, 주인공 앞쪽에 물건 배치 등을 통해 시각적으로 표현, 진단이 어려운 번아웃의 심리상태를 직관적으로 표현하고 있었다. 특히 번아웃의 진단 척도인 취미 생활이나 신체활동, 동료 커뮤니티의 유무 등이 번아웃에서 벗어나는데 도움이 된다는 것을 영화를 통해서도 확인할 수 있었다.

• Archives of Plastic Surgery
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• 제49권5호
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• pp.656-662
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• 2022

The median nerve can be compressed due to a tumor along the course of the median nerve, causing typical compression symptoms or even persistence or recurrence after an operation. The aim of this review is to provide a comprehensive overview of rare tumors described in recent publications that cause median nerve compression and to evaluate treatment options. The PubMed, Embase, and Web of Science databases were searched for studies describing median nerve compression due to a tumor in adults, published from the year 2000 and written in English. From 94 studies, information of approximately 100 patients have been obtained. Results The rare tumors causing compression were in 32 patients located at the carpal tunnel, in 21 cases in the palm of the hand, and 28 proximal from the carpal tunnel. In the other cases the compression site extended over a longer trajectory. There were 37 different histological types of lesions. Complete resection of the tumor was possible in 58 cases. A total of 8 patients presented for the second time after receiving initial therapy. During follow-up, three cases of recurrence were reported with a mean follow-up period of 11 months. The most common published cause of median nerve compression is the lipofibromatous hamartoma. Besides the typical sensory and motor symptoms of median nerve compression, a thorough physical examination of the complete upper extremity is necessary to find any swelling or triggering that might raise suspicion of the presence of a tumor.

• The Korean Journal of Pain
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• 제35권4호
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• pp.468-474
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• 2022

Background: The new type of corona virus has a wide range of symptoms. Some people who have COVID-19 can experience long-term effects from their infection, known as post-COVID conditions. The authors aimed to investigate prolonged musculoskeletal pain as a symptom of the post-COVID-19 condition. Methods: This is a descriptive study on the patients who were diagnosed with COVID-19 in a university hospital, between March 2020 and March 2021. Patient records and an extensive questionnaire were used to obtain relevant demographic and clinical characteristics, including hospitalization history, comorbidities, smoking history, duration of the pain, the area of pain, and the presence of accompanying neuropathic symptoms. Results: Of the diagnosed patients, 501 agreed to participate in the study. Among the participants, 318 had musculoskeletal pain during COVID-19 infection, and 69 of them reported prolonged pain symptoms as part of their a post-COVID condition which could not be attributed to any other cause. The mean duration of pain was 4.38 ± 1.73 months, and the mean pain level was 7.2 ± 4.3. Neuropathic pain symptoms such as burning sensation (n = 16, 23.2%), numbness (n = 15, 21.7%), tingling (n = 10, 14.5%), stinging (n = 4, 5.8%), freezing (n = 1, 1.4%) were accompanied in patients with prolonged musculoskeletal pain. Conclusions: Patients with COVID-19 may develop prolonged musculoskeletal pain. In some patients, neuropathic pain accompanies it. Awareness of prolonged post-COVID-19 pain is crucial for its early detection and management.

• Nuclear Engineering and Technology
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• 제54권10호
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• pp.3841-3848
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• 2022

The effect of modifiers on the optical features and radiation defying ability of the Eu³⁺ ions doped multi constituent glasses was examined. XRD has established the amorphous nature of the specimen. The presence of various functional/fundamental groups in the present glasses was analyzed through FTIR spectra. The physical, structural and elastic traits of the glasses were explored. The variation in the structural compactness of the glass structure according to the incorporated modifier was enlightened to describe their suitability for a better shielding media. For the examined glasses, the metallization criterion value varied in the range 0.613-0.692, indicating the non-metallic character of the glasses with possible nonlinear optical applications. The computed elastic moduli expose the Li-containing glass (BTLi:Eu) to be tightly packed and rigid, which is a requirement for a better shielding channel. Furthermore, the optical bandgap and the Urbach energy values are calculated based on the optical absorption spectra. The evaluated bonding parameters revealed the nature of the fabricated glasses covalent. In addition, we investigated the radiation attenuation attributes of the prepared Eu³⁺ ions doped multi constituent glasses using Phy-X software. We determined the linear attenuation coefficient (LAC) and reported the influence of the five oxides Li₂O₃, CaO, BaO, SrO, and ZnO on the LAC values. The LAC varied between 0.433 and 0.549 cm^-1 at 0.284 MeV. The 39B₂O₃-25TeO₂-15Li₂O₃-10Na₂O-10K₂O-1Eu₂O₃ glass has a much smaller LAC than the other glasses.

• Clinics in Shoulder and Elbow
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• 제25권2호
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• pp.129-139
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• 2022

Background: Several therapeutic methods have been proposed for frozen shoulder syndrome. These include suprascapular nerve block, a simple and cost-effective technique that eliminates the need for nonsteroidal anti-inflammatory drug therapy. Methods: This was a clinical trial that included patients with unilateral shoulder joint stiffness. Patients were divided into three groups: those treated with isolated physiotherapy for 12 weeks (PT group), those treated with a single dose intra-articular injection of corticosteroid together with physiotherapy (IACI group), and those treated with a suprascapular nerve block performed with a single indirect injection of 8-mL lidocaine HCL 1% and 2 mL (80 mg) methylprednisolone acetate together with physiotherapy (SSNB group). The variables assessed were age, sex, side of involvement, dominant limb, presence of diabetes, physical examination findings including erythema, swelling, and muscle wasting; palpation and movement findings; shoulder pain and disability index (SPADI) score; and the visual analog scale (VAS) score pre-intervention and at 2-, 4-, 6-, and 12-week post-intervention. Results: Ninety-seven patients were included in this survey (34 cases in the PT group, 32 cases in the IACI group, and 31 cases in the SSNB group). Mean age was 48.55±11.06 years. Fifty-seven cases were female (58.8%) and 40 were male (41.2%). Sixty-eight patients had a history of diabetes (70.1%). VAS and SPADI scores and range of mototion degrees dramatically improved in all cases (p<0.001). Results were best in the SSNB group (p<0.001), and the IACI group showed better results than the PT group (p<0.001). Conclusions: Suprascapular nerve block is an effective therapy with long-term pain relief and increased mobility of the shoulder joint in patients with adhesive capsulitis.