유아 언어영재 판별에서 프로젝트 스펙트럼(Project Spectrum)의 활용에 대한 기초연구

장영숙,황윤세 한국영유아보육학회 2003 한국영유아보육학 Vol.0 No.33

The identification of verbally gifted children during early childhood is very important for developing their potential in the society. Nonetheless, most researchers preferred to study the gifted of mathematics and science in the primary and secondary levels where reliable predictions of gifted may be made. Comparatively little work has been done in this area. Verbal Giftedness of young children is still developing and less stable than that of older children, and this prevents us from making firm and accurate identification. Project Spectrum can be used for the alternative assessment for the identification of verbally gifted children. The advantages of the Project Spectrum approach for the identification of verbally gifted children are as follows: First, the Spectrum approach can provide a useful means for assessing young verbally gifted children who have not demonstrated high ability on traditional identification method. Second, the Spectrum approach can blur the line dividing curriculum and assessment and thus can assess the learning process of young children.. Third, the Spectrum approach can embed assessments in meaningful, real-world activities Fourth, the Spectrum approach can be a more accurate predictor of potential by linking diagnosis and instruction. Thus, it can make us provide an educational treatment effectively for young verbally gifted children. Fifth, the Spectrum approach can lead individualized education by the early identification of young verbally gifted children.

간단한 인증키 동의 프로토콜인 Kim-Kim-Hwang 방법의 안전성 고찰

김윤정;김영신;황준 서울여자대학교 컴퓨터과학연구소 2004 정보기술논문지 Vol.2 No.-

The Diffie-Hellman Key Exchange scheme can produce a common session key between the two communicators, but its problem is that it makes a man-in-the middle attack possible. To solve problems like these, several protocols have been put forward, and the Simple Authenticated Key Agreement (SAKA) Protocol is among them. Seo-Sweeney suggested a SAKA protocol initially and the protocol has weakness that a malicious 3rd party can masquerade a valid user. Tseng suggested another protocol that advances this problem but this protocol can still be attacked when the messages in key verification phase are identical. Ku-Wang suggested a new protocol that advances this problem. Kim-Kim-Hwang also suggested a new SAKA protocol and confirmed that their protocol has same safeness and better performance compared to the other SAKA protocols. In this paper, we reanalyze the safeness of SAKA protocols and find out that Kim-Kim-Hwang protocol has not only better performance but also better safeness. Diffie-Hellman의 키 인증 기법에 대한 제 3자 공격 (man-in-the middle attack)에 강한 간단한 인증키 동의 프로토콜인 SAKA (Simple Authenticated Key Agreement Protocol)가 제안된 바 있다. SAKA는 초기에 Seo-Sweeney에 의해 제안되었으며 이 방법은 침입자가 중간에 메시지를 가로채서 정당한 사용자임을 가장할 수 있는 단점이 있다. Tseng은 이 단점을 개선한 방안을 제안하였는데 이것도 키 확인 메시지 두 개의 값이 같을 경우 공격을 받을 수 있음이 밝혀졌다. Ku-Wang은 Tseng 방법의 문제점을 개선한 알고리즘을 제안하였다 그리고 Kim-Kim-Hwang은 새로운 SAKA 알고리즘을 제안하고 이것이 기존 SAKA 프로토콜들과 안전성은 동일하면서도 성능이 개선된 것임을 밝힌바 있다. 본 논문에서는 안전성 분석의 재고찰을 통하여, Kim-Kim-Hwang의 방법이 기존 SAKA 프로토콜들보다 성능면에서뿐만 아니라, 안전성 면에서도 우수함을 밝힌다.

중장년 성인교정환자의 구강상태 및 치료양태에 관한 연구

이현정(Hyeon-Jung Lee),김진영(Jin-Young Kim),조진형(Jin-Hyoung Cho),황현식(Hyeon-Shik Hwang) 대한치과의사협회 2010 대한치과의사협회지 Vol.48 No.5

Orthodontic treatment for middle-aged patients has become more commonplace with various reasons including improved socioeconomic status. Understanding of oral status and treatment modalities of middle-aged patients is mandatory for accurate diagnosis and proper treatment planning. This study investigated 100 consecutive patients aged 40s and 50s and 100 aged 20s who had been examined and diagnosed at the Department of Orthodontics, Chonnam National University Dental Hospital. The results were obtained as follows; 1. Gender distribution showed female outnumbered male patients in young-aged adult patients, but middle-aged patients showed similar male and female distribution. 2. The major concern seeking orthodontic treatment was esthetics not only in young-aged but also in middle-aged adult patients, and a number of middle-aged patients were concerned about oral health as well. 3. Considerable number of middle-aged patients were referred by other dental specialties while young-aged adult patients were more self-motivated for orthodontic treatment. 4. Middle-aged adult patients had more missing teeth and periodontal disease than young-aged adults. 5. The most frequently-observed problem was dental spacing in middle-aged patients while dental crowding in young-aged adult patients. Middle-aged patients showed higher prevalence of deep overbite and overjet while most of young-aged adults presented opposite direction of problem in overbite and overjet. 6. Limited orthodontic treatment was required rather than comprehensive treatment in middle-aged patients, and the most common tooth moving area was anterior part of dentition in case of limited treatment. Need of interdisciplinary therapy with other dental specialties was more common in middle-aged patients. 7. Intervention of specific technique such as invisible TP, passive bracketing, passive wire bonding, and lingual orthodontics was more required in middle-aged patients. Considering that middle-aged patients have different characteristics than young-aged adults, the results of the present study suggest that different treatment modalities are required in middle-aged orthodontic patients in order to manage them properly and efficiently.

미생물 증식 공정에서의 새로운 기질 저해 모델 : Hwang 모델의 응용 Applications of Hwang Model

황영보 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

A new biokinetic model, named Hwang model, has been considered to account for the substrate inhibitory effects in microbial growth processes. Its main advantage is flexibility, i.e. its ability to fit experimental data which corresponds to diverse inhibition patterns including concave, convex, and linear as well as linear decrease with inhibition-threshold. Performances are compared on the basis of the goodness of fit and the best-fittings of different experimental data in the literature, respectively. Finally, Hwang model turns out to be flexible enough for the overall validation of microbial substrate inhibition phenomena.

新羅 法光寺 石塔記

黃壽永(Hwang Su-young) 백산학회 1970 白山學報 Vol.- No.8

Buddhism in Silla spread widely to local provinces with the be-ginning of the 9th century, and consequently many new temples of all sizes were founded here and there. Most of the stone pagodas of later Silla period now remaining in other areas than Kyongju, are those that were erected with this trend in the background. The site of Bopkwang-sa Temple(法光寺), now preserved at the eastern foot of Mt. Bi-hak(飛鶴山) in Sin-kwang-myon(神光面), Young-il-gun(迎日郡), North Kyongsang Province is one of the historical remains of Silla, especially one of those dating back to this period. There is a three-storeyed stone pagoda standing on this site today. Unfortunately, the sarira and other valuable articles of this stone pagoda were stolen by thieves only a few years ago, but there remain two small tablets (jiseok-誌石). Through the inscriptions on these stones the dates of the erection and repairs of the stone pagoda were learned, and, further, through the names of persons in the inscriptions was found the fact that this temple had been in close relationship with the royal family of the kingdom. The tablets each bear six letters ‘Bopkwang-sa-seok-tab-gi’(法光寺石塔記)-epitaph for the stone pagoda-inscribed on a side, and the main inscriptions on the other surfaces are, in summary, as follows: [On the first tablet, 10. 8 ㎝ long and 4 ㎝ wide] “This pagoda is erected by Hyang-jo(香照) and Weon-jeok(圓寂) in the seventh moon of the second year of Dae-hwa(大和2年)-(A.D. 828) and the supporter is King Seong-deok(成德大王). “The pagoda is moved and repaired in the ninth moon of the sixth year of Hoe-chang(會昌6年). Prayed is that the supporters generation after generation may be reborn in Paradise, and that the king may live long in happiness. “Twenty-two sarira in the pagoda” [On the second tablet, 6.2 ㎝ long and 2.7 ㎝ wide] “Is repaired in the seventh moon of the 37th year of K’anghsi (康熙37年-A.D. 1638). “Is repaired in the second moon of the 12th year of Chienlung (乾隆12年-A.D. 1747). “Chief executives are Myeong-ok(明玉) and Dam-hak(談學)...” By the first stone it is certain that the pagoda was first erected in 828 and moved to the present site in 846. But the epitaph itself must have been inscribed in 846, the latter date. For King Seong-deok being the father of King Sin-mu(神武王), began to be called by this posthumous title only in the first year of King Sin-mu (A.D. 839). King Seong-deok had been, in life, that Kim Kyun-jeong the famous character in Silla history, and he could hardly have been called by that title in A.D. 828, when the pagoda was first erected. From the inscriptions stating that King Seong-deok was the main supporter of this Bopkwang-sa Temple, it is clearly to be seen that the temple was supported by him and his descendants of the direct line, King Sin-mu, King Mun-seong,(文聖王), etc. Temples of Later Silla period were each founded and supported by opposing sects or lines of royalty. The second stone makes it clear that the pagoda was twice repaired in modern times. Especially, the repair made in the reign of King Young-jo of Yi Dynasty is recorded in detail in the inscriptions on the monument standing in the back of the pagoda. This monument, erected in the 15th year of Chienlung(1750), tells us not merely of the existence of the two tablets, but of the way of preserving the sarira and also lists the stored items. This three-storeyed stone pagoda, although it is of a small size, will serve as a standard in study of other stone pagodas of Silla period, now that its date of erection has been determined. And the two small tablets, too, are rightfully important data for study of ancient epigraphy.

Increased 11β-hydroxysteroid dehydrogenase type 1 contributes to barrier dysfunction in aged skin

( Beom Jun Kim ),( Noo Ri Lee ),( Chung Hyeok Lee ),( Young Bin Lee ),( Solam Lee ),( Hyun Jee Hwang ),( Eunjung Kim ),( Eung Ho Choi ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2

Background: 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) converts inactive cortisone into cortisol, an active form, and is expressed by several tissues including the skin. Excessive active glucocorticoid (GC) deteriorates skin barrier function. Objectives: To find out if 11β-HSD1 affects on the barrier function in aged skin. Methods: We have performed human and in vivo studies. We measured cortisol in stratum corneum (SC) and oral epithelium of the elderly and young. Hairless mice were used for 11β-HSD1 immunohistochemistry staining of skin and measuring skin barrier function and serum cytokines. 11β-HSD1 knock-out (KO) mice and its wild-type were used for measuring lipid synthesis related enzyme. Results: Cortisol levels were elevated in SC and oral epithelium of the elderly rather than young. The 11β -HSD1 expression was increased in immunohistochemistry stain of aged mice skin. Aged mice showed decreased transepidermal water loss (TEWL) and SC hydration, and increased SC integrity than young. Serum inflammatory cytokines including interleukin-1α, -4, -10, -31 and tumor necrosis factor-α were increased in aged mice than young. The expressions of lipid synthesis related enzymes in epidermis were elevated in KO mice and topical 11β -HSD1 inhibitor applied mice. Conclusion: 11β-HSD1 expression is elevated in aged skin. It increases active GC and then deteriorates skin barrier function.

Development of polypropylene-clay nanocomposite with supercritical $CO_2$ assisted twin screw extrusion

Hwang, Tae-Yong,Lee, Sang-Myung,Ahn, Young-Joon,Lee, Jae-Wook The Korean Society of Rheology 2008 Korea-Australia rheology journal Vol.20 No.4

The aim of this study is to explore the possibility of incorporating supercritical carbon dioxide ($scCO_2$) into twin screw extrusion process for the production of polypropylene-clay nanocomposite (PPCN). The $CO_2$ is used as a reversible plasticizer which is expected to rapidly transport polymeric chains into the galleries of clay layers in its supercritical condition inside the extruder barrel and to expand the gallery spacings in its sub-critical state upon emerging from die. The structure and properties of the resulting PPCNs are characterized using wide-angle X-ray diffraction (WAXD), transmission electron microscopy (TEM), rheometry, thermogravimetry and mechanical testing. In the processing of the PPCNs with $scCO_2$, optimum $scCO_2$ concentration and screw speed which maximized the degree of intercalation of clay layers were observed. The WAXD result reveals that the PP/PP-g-MA/clay system treated with $scCO_2$ has more exfoliated structure than that without $scCO_2$ treatment, which is supported by TEM result. $scCO_2$ processing enhanced the thermal stability of PPCN hybrids. From the measurement of linear viscoelastic property, a solid-like behavior at low frequency was observed for the PPCNs with high concentration of PP-g-MA. The use of $scCO_2$ generally increased Young's modulus and tensile strength of PPCN hybrids.

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Young‑Seok Oh,Ho Won Lee,Kook‑Chae Chung,Duck‑Young Hwang,Seong‑Hoon Kang,Jeong Whan Yoon 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

Numerical modeling was conducted to investigate the deformation behavior of powder mixture during multi-pass drawingprocesses for multi-filamentary MgB2wire. A modified Drucker-Prager Cap (DPC) model with an elliptical cap surface usingthe new material characterization method was developed to capture the anisotropic hardening behavior and hydrostatic effectof the powder mixture. A number of uniaxial die compaction, cold isostatic pressing, diametrical compression, and uniaxialcompression tests were conducted using different powder densities to characterize the modified DPC model. A commercialfinite element software ABAQUS with a user subroutine was used to simulate the drawing of the MgB2wire. The densityand area fraction of the powder mixture during the wire-drawing process were verified with experimental results. The differencein packing density at the inner and outer filaments of the MgB2wire was successfully captured by simulation. Inaddition, the effect of the initial packing density on the superconducting properties of MgB2wire was numerically studied. It is shown that the increase in the superconducting area, which results from a high initial packing density, should be moreeffective compared to the increase in the grain connectivity in enhancing the critical current properties for the MgB2wirewhen the final packing density is saturated after a number of drawing processes.

흰쥐에서 갑상샘 절제 후 재생에 따른 세포 및 세포사이물질의 변화

황영일,정용환,이왕재,황덕호,유영복,김혜숙,장가용 대한해부학회 1997 Anatomy & Cell Biology Vol.30 No.4

흰쥐 시상하부에서 NMDA에 의한 c-fos의 발현

이영기,최기열,이원돈,유영복,이왕재,황덕호,조사선,장가용 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.3