• 한국콘텐츠학회논문지
• /
• 제20권10호
• /
• pp.326-337
• /
• 2020

본 연구의 목적은 도시 고령자와 농촌 고령자의 사회참여활동 유형이 인지기능 손상 정도(정상, 경증 인지기능저하, 중증 치매 의심)에 미치는 영향을 분석하는 것이다. 연구목적을 위해 6차(2016년)와 7차(2018년) 고령화 연구패널 조사 데이터 중 55세 이상 고령자 5,668명의 자료를 사용하여 다항 로지스틱 회귀분석을 하였다. 분석결과는 어떤 유형이든지 사회참여활동 하는 것이 인지기능 장애 위험을 줄여준다는 것은 도시와 농촌 둘 다 일관되게 유의하였으나, 도움이 되는 사회참여활동 유형이 도시와 농촌 간 차이가 있었다. 즉, 도시와 농촌에 사는지에 따라 정상군에서 인지기능저하 또는 치매 의심이 될 위험을 낮추는 데 도움이 되는 사회참여 활동 유형과 인지기능저하에서 치매 의심이 될 위험을 낮추는 데 유의한 유형이 달랐다. 따라서 인지기능 장애를 예방하고 치매 중증도를 완화하는 데 사회참여활동을 적극적으로 권장돼야 하며 적절한 지원이 필요하다는 것을 보여준다. 그리고 도시와 농촌의 차이를 고려한 정책과 개입이 요구됨을 함의한다.

• Hip & pelvis
• /
• 제36권1호
• /
• pp.37-46
• /
• 2024

Purpose: The prognosis of total hip replacement (THR) after open reduction and internal fixation (ORIF) versus THR following non-operative treatment of acetabular fractures is unclear. Few studies have been conducted in this regard. Therefore, the purpose of the current study was to perform an assessment and compare the functional outcomes for study subjects in the ORIF and non-ORIF groups during the follow-up period compared to baseline. Materials and Methods: This longitudinal comparative study, which included 40 patients who underwent THR for either posttraumatic arthritis after fixation of an acetabular fracture or arthritis following conservative management of a fracture, was conducted for 60 months. Twenty-four patients had undergone ORIF, and 16 patients had undergone nonoperative/conservative management for acetabular fractures. Following THR, the patients were followed up for monitoring of functional outcomes for the Harris hip score (HHS) and comparison between the ORIF and non-ORIF groups was performed. Results: The HHS showed significant improvement in both ORIF and non-ORIF groups. At the end of the mean follow-up period, no significant variation in scores was observed between the groups, i.e., ORIF group (91.61±6.64) compared to non-ORIF group (85.74±11.56). A significantly higher number of re-interventions were required for medial wall fractures and combined fractures compared to posterior fractures (P <0.05). Conclusion: THR resulted in improved functional outcome during follow-up in both the groups; however, the ORIF group was observed to have better functional outcome. Re-intervention was not required for any of the posterior fractures at the end of the mean follow-up period.

• 한국지반신소재학회논문집
• /
• 제14권4호
• /
• pp.147-158
• /
• 2015

본 연구에서는 하수관로 손상을 예방하고 다짐불량으로 인한 지반침하를 방지할 수 있는 하수관로 뒤채움재를 개발하였다. CA 치환율, 촉진제 종류 및 치환율, 물-재료비 등에 대한 실내실험을 수행하였는데, 재령 4시간 압축강도는 W/M 70% 이하에서 0.55~0.64MPa, W/B 80% 이상에서는 0.20MPa로 나타나 국외 유동화토의 압축강도 기준인 0.13MPa을 만족하는 것으로 나타났다. 현장 시험시공에서는 얼음블록을 이용하여 인위적으로 지중에 공동을 생성시키고 하수관로 변형을 유도하였다. 기존의 모래다짐 방법과 개발 뒤채움재의 성능을 비교 평가하였는데, 모래다짐 구간의 횡단면 발생 침하량은 최대 23.4cm, 종단면은 최대 27cm 발생하였으나, 뒤채움재 시공 구간에서는 횡단면에서 최대 0.01cm가 발생하였고, 종단면은 시간이 경과하여도 침하량의 변화가 나타나지 않았다.

• 물과 미래
• /
• 제28권3호
• /
• pp.205-216
• /
• 1995

자연하천의 종확산과정을 정확하게 대표하는 종확산계수의 선정을 위하여 기 제안된 종확산계수 추정공식들을 비교 분석하였다. 종확산계수 공식 중 적용성이 비교적 우수한 공식을 선정하여 미국 언역의 26개 하천에서 수집된 실측치와 비교하였다. 본 연구에서 밝혀진 사실은 다음과 같다. Elder공식은 종확산계수를 상당히 과소 산정하기 때문에 1차원 확산모형의 종확산계수의 산정에는 부적합하다. McQuivey와 Keefer공식은 전체적으로 과대 산정하는 편이고, Magazine 등 공식은 대부분의 경우에 과소 산정하고 있다. 이들에 비해 Iwasa와 Aya공식은 비교적 양호한 거동을 보이고 있다. Fischer공식은 전체적으로 과대 산정하고 있으나, Liu공식은 양호한 거동을 보이고 있으며 특히 정확도 면에서는 가장 우수한 것으로 나타났다. 그러나 Liu공식은 하폭의 제곱 형태를 포함하고 있기 때문에 하천의 폭이 큰 대하천의 경우 종확산계수를 과대 산정하고 있다. 따라서 하폭이 큰 대하천(200m 이상)의 경우에는 Liu공식의 사용을 피하는 것이 바람직한 것으로 사료된다.

• Journal of Periodontal and Implant Science
• /
• 제43권6호
• /
• pp.269-275
• /
• 2013

Purpose: In this study, the effect of calcium sodium phosphosilicate (NovaMin) desensitizing agent, which is a powder-based system, and hydroxyethyl methacrylate and glutaraldehyde (Gluma desensitizer), which is liquid-based system, on dentinal tubule occlusion was analyzed by scanning electron microscope. The effects of the above two along with one control group were compared to determine the more effective method of sealing the dentinal tubules after initial application. Methods: Twenty specimens were allocated to each of 3 groups: Control, Gluma desensitizer, and NovaMin. Two additional samples were also prepared and treated with Gluma and NovaMin; these samples were longitudinally fractured. The specimens were prepared from extracted sound human premolars and were stored in 10% formalin at room temperature. The teeth were cleaned of gross debris and then sectioned to provide one to two dentin specimens. The dentin specimens were etched with 6% citric acid for 2 minutes and rinsed in distilled water. Control discs were dried, and the test discs were treated with the desensitizing agents as per the manufacturer's instructions. The discs as well as longitudinal sections were later analyzed under the scanning electron microscope. The proportions of completely occluded, partially occluded, and open tubules within each group were calculated. The ratios of completely and partially occluded tubules to the total tubules for all the groups was determined, and the data was statistically analyzed using nonparametric tests and statistical significance was calculated. Results: NovaMin showed more completely occluded tubules ($0.545{\pm}0.051$) while Gluma desensitizer showed more partially occluded tubules ($0.532{\pm}0.075$). The differences among all the groups were statistically significant ($P{\leq}0.05$). Conclusion: Both materials were effective in occluding dentinal tubules but NovaMin appeared more promising in occluding tubules completely after initial application.

• 말소리와 음성과학
• /
• 제6권4호
• /
• pp.27-36
• /
• 2014

This study provided longitudinal examination of the Chinese learners' acquisition of Korean vowels. Specifically, I examined the Chinese learners' Korean monophthongs /i, e, ɨ, ${\Lambda}$, a, u, o/ that were created at the time of 1 month and 12 months, tried to verify empirically how they learn by dealing with their mother tongue, and Korean vowels through dealing with pattern of the Perceptual Assimilation Model (henceforth PAM) of Best (Best, 1993; 1994; Best & Tyler, 2007) and the Speech Learning Model (henceforth SLM) of Flege (Flege, 1987; Bohn & Flege, 1992, Flege, 1995). As a result, most of the present results are shown to be similarly explained by the PAM and SLM, and the only discrepancy between these two models is found in the 'similar' category of sounds between the learners' native language and the target language. Specifically, the acquisition pattern of /u/ and /o/ in Korean is well accounted for the PAM, but not in the SLM. The SLM did not explain why the Chinese learners had difficulty in acquiring the Korean vowel /u/, because according to the SLM, the vowel /u/ in Chinese (the native language) is matched either to the vowel /u/ or /o/ in Korean (the target language). Namely, there is only a one-to-one matching relationship between the native language and the target language. In contrast, the Chinese learners' difficulty for the Korean vowel /u/ is well accounted for in the PAM in that the Chinese vowel /u/ is matched to the vowel pair /o, u/ in Korean, not the single vowel, /o/ or /u/.

• 의학교육논단
• /
• 제16권1호
• /
• pp.32-41
• /
• 2014

The purpose of this study was to investigate the differences in non-cognitive factors, specifically achievement goal orientation (AGO) and self-regulated learning (SRL), influencing the academic achievement (AC) of medical and nursing students. 186 students, including 110 medical students and 76 nursing students, completed a survey, which addressed the factors of AGO and SRL. There were significant differences in the factors that affected the academic achievement of medical and nursing students. Multiple regression revealed that the AC of medical students was significantly more affected by mastery-approach AGO (p<0.05), seeking information (p<0.001), and rehearsing/memorizing SRL (p<0.01), while the AC of nursing students was affected by performance-approach AGO, self-efficacy (p<0.001), and time-management SRL. Analysis of variance revealed that significant differences in the sub-factors of AGO and SRL between the medical and nursing students. Thus, it was found that the academic achievement of medical and nursing students was influenced by non-cognitive factors, but there were significant differences in the sub-factors by group. It is suggested that comparative studies with other student groups and a longitudinal study of medical and nursing students need to be conducted, and a personalized counseling and learning intervention focusing on non-cognitive factors should be provided to medical and nursing students.

• 한국산학기술학회논문지
• /
• 제14권11호
• /
• pp.5819-5826
• /
• 2013

연구목적: 본 연구는 미국심장협회 ACLS provider course의 시뮬레이션기반 전문심장소생술 교육이 간호학생의 지식 및 수행능력에 미치는 효과를 검증하기 위함이다. 연구방법: 연구대상은 D대학 졸업학년 간호학생 22명이다. 수집된 자료는 SPSS/WIN 18.0 program을 이용하여 분석하였다. 연구결과: 시뮬레이션기반 전문심장소생술 교육을 받은 후 교육 전보다 간호학생의 지식 및 수행능력 점수가 유의하게 높아졌다. 결론: 시뮬레이션기반 전문심장소생술 교육은 간호학생의 지식 및 수행능력을 향상시키는데 효과적임을 검증하였으므로 간호학생 대상의 표준화된 응급간호 교육프로그램 개발에 기초자료를 제공할 수 있다고 본다. 또한 전문심장소생술 교육에 다양한 학습방법을 적용한 후 비교분석하는 후속연구와 지식 및 수행능력 지속성 연구와 같은 종적연구를 제언한다.

• 한국구조물진단유지관리공학회 논문집
• /
• 제18권5호
• /
• pp.68-77
• /
• 2014

본 연구에서는 초박층 교면포장으로 폴리설파이드 에폭시 폴리머 콘크리트 포장을 선정하여, 에폭시 아스팔트 포장, SFRC 포장과의 비교 분석을 통해 폴리머 콘크리트 포장이 강바닥판의 피로응력범위에 어떠한 영향을 미치는 지 분석하였다. 강바닥판의 피로응력범위를 산정하기 위해 Abaqus를 사용한 유한요소해석을 사용하여 비교평가하였으며, 용접부에 교축방향 및 교축직각방향의 다축응력이 발생하는 점을 감안하여 Signed Von-Mises 응력을 도입하여 피로 검토에 활용하였다. 강바닥판의 피로응력범위를 산정하기 위해 Abaqus를 사용한 유한요소해석을 사용하여 포장 재료 및 두께에 따라 비교평가하였으며, 용접부에 교축방향 및 교축직각방향의 다축응력이 발생하는 점을 감안하여 Signed Von-Mises 응력을 도입하여 피로 검토에 활용하였다.

• ALGAE
• /
• 제29권2호
• /
• pp.57-73
• /
• 2014

Amphora Ehrenberg ex Kutzing sensu lato is a common and widespread benthic diatom genus with a taxonomy that has been under continual revision, particularly based on molecular analyses. Although Amphora species have been studied using modern microscopy in recent years, there has not been much progress on molecular characterization of the species, especially in Asia. In this study of Amphora, sampling was carried out from September 2009 to August 2010 in Korean coastal waters. The morphological and molecular characteristics of eight Amphora sensu lato were examined: Amphora marina, A. proteus, Halamphora costata, H. coffeaeformis, H. eunotia, H. holsatica, H. terroris, and Halamphora sp. Based on previous accounts, morphology suggested that A. marina and A. proteus belong to the subgenus Amphora Cleve, which have smooth girdle bands and rather coarse and very distinct areolae on the valve. The other species, H. coffeaeformis, H. costata, H. eunotia, H. holsatica, H. terroris, and Halamphora sp. belong to the subgenus Halamphora Cleve, which was recently elevated to generic status by Levkov 2009, have plicate girdle bands, puncta which do not form straight longitudinal lines, valves which have a narrow ventral portion and apices that are generally rostrate-capitate and recurved. In agreement with analysis based on morphological characteristics, phylogenetic analysis based on small subunit rDNA suggested that the eight Amphora sensu lato species were not a monophyletic group as the morphological classification. Also, the results of molecular work and statistical analysis on all these Amphora sensu lato combined with phylogenic analysis on our geographically representative samples give strong evidence that Halamphora Levkov is independent of Amphora Cleve. Furthermore, in this study, Amphora terroris was transferred Halamphora as Halamphora terroris (Ehrenberg) Wang comb. nov. and Amphora marina was recorded for the first time in Korea.