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      • KCI등재

        Language Socialization Practices of Seven Adolescents of Korean Heritage in the US

        Lee.Gi-ven.Song Mi-jeong 한국사회언어학회 2012 사회언어학 Vol.20 No.1

        Lee, Gi-venㆍSong, Mi-jeong. 2011. Language Socialization Practices of Seven Adolescents of Korean Heritage in the US. The Sociolinguistic Journal of Korea, 20(1). pp. 135-159. This study explores cultural and linguistic practices, identity negotiation, and power dynamics manifested in language socialization practices in a recreational setting of seven high school and college students of Korean heritage currently residing in the US. In conjunction with interviews, audio-tapings and observations of these students' weekly basketball games serve as the data sources. Analyses of data demonstrate that the basketball game offers a prime context for these students to speak Korean, practice Korean sociocultural values and rules, negotiate their identity, and establish their own position in the group. While they all speak English for the majority of time in their day-to-day interactions, the students mostly use Korean in the basketball setting, particularly when talking about Korea-related topics. In terms of negotiating their ethnic identity, the Korean-born students seem to negotiate their identity more strictly than the US-born students, who appear to negotiate their identity more ambiguously and flexibly. Also, the power and authority to control the interaction seems to depend upon the symbolic and material resources that the students own.

      • KCI등재

        교육과정 개정에 따른 과학의 본성 수준 및 반영 정도 분석 : 2009 개정 교육과정과 2015 개정 교육과정 사례 분석

        정명현(Jeong, Myeonghyeon),유인성(You, Insung),민소원(Min, Sowon),홍훈기(Hong, Hun-Gi) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.17

        지난 수십 년간 과학의 본성의 중요성은 지속적으로 강조되어왔다. 본 연구에서는 2009 개정 교육과정에서 2015 개정 교육과정으로 교육과정이 개정됨에 따라 과학의 본성 반영정도와 그 수준이 어떻게 변화되고 있는지 알아보았다. Abd-El-Khalick et al. (2008)의 과학의 본성 정의를 반영하여 구성된 이정원 외(2016)의 NOSAT(Nature of Science analyzing tool) 분석틀을 이용하여 2009 개정 교육과정융합과학 교과서와 2015 개정교육과정 통합과학 교과서의 과학의 본성의 영역과 수준을 분석하였다. 분석 결과 융합과학과 통합과학 모두에서 가장 많이 나타난 과학의 본성 영역은 이론, 관찰추론, 사회문화로 나타났다. 두 교과서 모두에서 암시적인 관점의 서술의 비율이 명시적인 관점의 서술에 비해 높게 나타났다. 두 교과서의 과학의 본성을 서로 비교한 결과 각 출판사의 과학의 본성 서술 방향에 따라 과학의 본성의 빈도 및 명시성의 정도가 서로 다르게 나타났다. 교과서 집필방향에서 명시적인 서술이 더 증가하는 것이 필요하고, 일부 과학의 본성 영역에 편중되어 있는 현상을 줄이고 각 과학의 본성 영역이 균형 있게 배치되도록 하는 것이 필요할 것으로 보인다. Over the past decades, the importance of the nature of science has been emphasized. This study examined how the degree of reflection and the level of the nature of science (NOS) is advancing as the curriculum has been revised from ‘2009-revised-curriculum’ to ‘2015-revised-curriculum’. The area and level of the NOS in ‘Convergence-science’ of ‘2009-revised-curriculum’ and ‘Integrated-science’ of ‘2015-revised-curriculum’ were analyzed using the Nature of Science analyzing tool (NOSAT) which Lee Jeong-won et al. (2016) had made reflecting the definition of the NOS by Abd-El-Khalick et al. (2008). As a result of our analysis, the area of the NOS that appeared most in both ‘Convergence-science’ and ‘Integrated-science’ was ‘Theory’, ‘Inference’, and ‘Social and Cultural embeddedness’. In both textbooks of the curriculum, the proportion of implicit point of view was higher than that of explicit point of view. As a result of comparing the NOS in the textbooks, the frequency and the extent of the explicit descriptions of NOS differed according to the direction toward the nature of science of which each publisher writes. It is necessary to increase the number of explicit descriptions in the direction of textbook writing, and to reduce the phenomena that are biased toward the certain area of NOS and balance each area of NOS.

      • KCI등재

        성음(聲音)과 언어(言語)에 관(關)한 문헌적(文獻的) 고찰(考察)

        정희재,오태환,정승기,이형구,Jeong, Hee-Jae,Oh, Tae-Hwan,Jung, Sung-Gi,Rhee, Hyung-Koo 대한한방내과학회 1991 大韓韓方內科學會誌 Vol.12 No.1

        The results of the investigation of literature were summerized as follows ; 1. Information of voice, the pharynx, the larynx, the epiglottis, the uvula and the hyoid bone were concerned. 2. In disorders of voice and speech, Lung channel, Stomach channel, Spleen channel, Heart channel, Liver channel, Kidney channel, Im channel (任脈), and Chung channel (衝脈) were concerned. 3. The disorders of voice and speech were showed as follows ; aphonia, ashasia, seong-shi (?嘶), seom-eo(?語) kwang-eo (狂語), jeong-seong (鄭?), dok-eo (獨語) and chak-eo (錯語). 4. The cause of Aphonia and Aphasia were freauently as follows ; abnormal rising of Liver energy (肝邪暴逆), excessive heart fire (心火太過), deficiency of heart-blood (心血太虛), apoplexy of heart spleen (心脾俱中風), consumption of lung fluid caused by heat evil (肺津被灼), deficiency of lung energy (肺氣虛寒) and dificiency of kidney energy (腎虛). 5. The cause of seom-eo, kwang-eo, Jeong-seong were as follows ; the heart of stomach (胃中熱), the heat evil attach the blood chamber (血人血室) and the consumption of healthy energy (精氣奪). 6. In disorders of voice and speech, flaceid tong with aphasia (舌?) and aphasia due to throat disease (喉?) were divided.

      • 성장호르몬 분비성 뇌하수체 선종에서 소마토스타틴 수용체 (제2아형, 제5아형), G_i2α 및 Pit-1 유전자 발현

        류미숙,양인명,박철영,우정택,김성운,김진우,김영설,최영길,김은희,박승준,김국기 대한내분비학회 2002 Endocrinology and metabolism Vol.17 No.2

        Background: Mutation of Gs protein subunit (gsp oncogene), detected in about 30∼40% of growth hormone (GH)-secreting pituitary tumors, is associated with an increased long-acting somatostatin analog octreotide sensitivity. However, the mRNA expression of somatostatin receptor (sst) was not changed in the GH-secreting pituitary tumor, regardless of whether they were gsp oncogene positive or negative. This suggests that the expression of genes coding for G_i2α, Pit-1 and the other factors involved in the regulation of secretory activity in somatotrophs is likely to be altered in gsp oncogene positive tumors. We observed the impact of the gsp oncogene on the expression of the genes coding for Gi2, Pit-1 and sst (2&5) in GH-secreting pituitary tumors. Methods: The GH response to octreotide was examined in 13 acromegalic patients before transsphenoidal adenomectomy. Genomic DNA and RNA were extracted from fresh frozen tumor tissues. PCR was performed to amplify and sequence the region between codon 184 and 251 that includes exons 8 and 9 of the Gs gene. Sst2, sst5, G_i2α and Pit-1 mRNA levels were measured by semi-quantitative RT-PCR. Results: Sst2 and sst5 mRNA transcripts were detected in all tumors (7 gsp +, 6 gsp-). The amount of sst transcripts varied considerably varied between the tumors. There were no significant differences in sex, age, tumor size, grade or basal GH levels. Pit-1 and sst2 mRNA levels were not different. In contrast, G_i2 mRNA levels were significantly higher in gsp (+) while sst5 mRNA levels were higher in gsp (-). Conclusion: These data suggests that gsp oncogene may increase Gi2α levels but decrease sst5 mRNA levels. However, Pit-1 and sst2 mRNA expression may not be affected by gsp oncogene. The increased expression of the G_i2α gene might be an inhibitory compensatory response to the action of gsp oncogene

      • KCI등재

        하악 제1 대구치 근단부의 형태학적 연구

        정현,박상진,박상혁,최기운 대한치과보존학회 2009 Restorative Dentistry & Endodontics Vol.34 No.2

        The aim of this study was to investigate thc shapes and diameters of the physiological foramen and anatomy of the root canal at 3mm from apex in mandibular first molars. Slxty mandibular first molars were randomly selected. The apical anatomy of 60 mandibular first molars was investigated by means of a stereomicroscope (60x magnification). Thc results were as follows; 1 There was a high percentage of two physiological foramina in mesial (61.67%) and one foramen in distal (71.66%) roots of mandibular first molars. 2 There was a high frequency of accessory foramina in mesial roots with one foramen (26.07%) 3 The diameters of physiological foramen was as follows: ·0.329mm in single mesial foramen ·0.266mm in mesioccal foramen and 0.246mm in mesiolingual foramen ·0.375mm in single distal foramen ·0.291mm in distobuccal foramen and 0.237mm in distolingual foramen 4 The most common physiological foramen shape was oval (69.93%) 5 The incidence of isthmus in mesial root at 3mm from apex was 55%. The 3mm-sections contained a complete isthmus 31.66% and a partial isthmus 23.34% 6 3mm from tho apex, the most common canal shape was oval (50.64%) Knowledge of the apical anatomy of mandibular first molar would be necessary for success of surgical and nonsurgical endodontic treatment. 본 연구는 한국인의 하악 제1 대구치 60개를 대상으로 생리적 근단공의 크기와 형태, 근심 치근의 치근단 3mm에서 isthmus의 발생 빈도와 형태, 그리고 원심 치근의 치근단 3mm의 근관 형태를 입체현미경하에서 60배로 조사한 결과 다음과 같은 결론을물 얻었다. 1.근심 치근은 두 개의 근단공을 가지는 비율이 높았으며(61.67%), 원심 치근은 하나의 근단공을 가지는 비율이 높았다(71.66%). 2.부근단공의 빈도는 근심 치근의 1개의 근단공을 가지는 경우가 가장 높았다(26.07%). 3.생리적 근단공의 크기는 근심 치근에서 하나의 근단공을 가지는 경우 0.329mm, 근심 협측 근단공은 0.266mm 근심 설측 근단공은 0.246mm였으며, 원심 치근에서 하나의 근단공을 가지는 경우 0.375mm, 원심 협측 근단공은 0.291mm, 원심 설측 근단공은 0.237mm로 나타났다. 4.근단공의 형태는 oval 형태(69.93%)가 가장 많았다. 5.근심 치근의 치근단 3mm에서 isthmus의 발생빈도는 55%였으며, partial isthmus는 31.66%, complete isthmus는 23.34%로 나타났다. 6. 원심 치근의 치근단 3mm의 근관 형태는 oval 형태(50.64%)가 가장 많았다. 이상의 연구 결과 하악 제1 대구치의 성공적인 근관 치료를 위해서는 생리적 근단공의 실제 크기와 형태 및 isthmus의 존재에 대한 사전 지식이 필요할 것이다.

      • 전도잡음을 감소시킨 강압형 컨버트 구조의 효율연구

        정동호,탁기덕 동양대학교 2010 동양대학교 논문집 Vol.14 No.1

        DC-DC buck converters with closed-loop pulse width modulation(PWM) are strongly nonlinear systems which are potentially chaotic. We investigated experimentally a modified buck converter using low pass filter(LPF) or error amplifier or pulse filtering circuit for conduction noise problems occurring in the output voltage. The proposed circuit is simple and improve efficiency and stability above 50% of duty ratio. In this paper, they reveal high efficiency and smaller ripple voltage for wide industrial application.

      • KCI등재후보

        앤더슨 모형을 이용한 우리나라 일부 대학생의 구강진료이용행태에 관한 연구

        정기천,이흥수,김수남 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.3

        The purpose of this study is to provide framework for understanding university students' dental services utilization. In this paper Andersen model is applied to the analysis of dental services utilization. This model consists of predisposing, enabling, and need components that describe a person's decision to use dental health services. Questionnaire surveys were conducted for 521 university students. The number of independent variables used in the analysis was 36 in total, ie 25 predisposing components, 8 enabling components, and 3 need components. For statistical analyses of collected data, the multiple regression and the path analysis were adopted, The results obtained were as follows; 1. The proportion of student' dental visits was 41.5%, and the average of the dental visits was 2.33. 2. The purpose of most important recent utilization was dental caries treatment in university student. Also 4.4% of student visited dental clinic for oral disease prevention. 3. The amount of variance of the Andersen model for university student's dental visits was 16%. And of predisposing, enabling and need factors, which are components of the Andersen model, the need factors showed the largest amount of variance for university student's dental visits. 4. Number of restricted activity days caused by oral disease, having a regular dental care, socioeconomic status and perception on oral disease prevention were found to have significant major effects on dental services utilization of university student. Number of restricted activity days was most important factor affecting dental services utilization of student.

      • Least Mean Mixed-Norm 알고리즘을 이용한 반향제거기

        정기석 永同大學校 1999 硏究論叢 Vol.5 No.1

        본 논문에서는 전이중 디지틀 가입자선로 모뎀에서 사용될 수 있는 새로운 반향제거기를 제안하였다. 제안된 반향제거기는 least mean mixed norm 알고리즘을 사용하였다. 이 알고리즘은 반향제거기의 근단부분에서는 least mean square(LHS) 알고리즘을 사용하고 원단부분에서는 least mean fourth(LMF) 알고리즘을 사용한다. 컴퓨터 시뮬레이션 결과, 제안된 반향제거기는 표준 LMS알고리즘을 사용한 반향제거 기와 비교하여 더 빠른 수렴률과 더 낮은 MSE를 갖는 것을 알 수 있었다. This paper proposes a new echo canceller that can be used in a full-duplex digital subscriber loop modem. The proposed echo canceller uses a least mean mixed norm algorithm. The algorithm consists of simultaneously applying the least mean square(LMS) algorithm to the near-end section of the echo canceller and the least mean fourth(LMF) algorithm to the far-end section. It is shown in this paper that the new scheme leads to a faster convergence and a lower MSE(mean square error) compared with the one obtained by the standard algorithm.

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