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시행간 간격이 긴 고전조건화: 순행, 동시 및 역행조건화
조원호(Won-ho Cho) 국민대학교 교육연구소 1988 교육논총 Vol.7 No.-
There has been an apparent discrepancy between the theorethical view that backward conditioning does not occur and the experimental evidence which suggests that it does. In this experiment, the effect of foreward, simultaneous, and backward conditioning were studied in very long intertrial interval paradigm of nictitating membrane response of rabbit. Conditioned stimulus duration was 1100 msec and unconditioned stimuls was 100 msec, The animals were sutured one day prior to the two-day adaptation session. The acquisition session consisted of one trial/day for fifteen days. And then, extinction session was followed for five days. Empirical evidences were obtained in the forward and simultaneous conditioned groups, but not in the backward group.
치아우식증 유발 세균에 대한 CPC 함유 구강청정제의 항균효과
조원호 ( Won-ho Cho ),조자원 ( Ja-won Cho ),유현준 ( Hyun-jun Yoo ),신경훈 ( Kyong-hoon Shin ),신기해 ( Gi-hae Shin ),전열매 ( Yeol-mae Jeon ),이종천 ( Jong-cheon Lee ) 대한예방치과·구강보건학회 2021 大韓口腔保健學會誌 Vol.45 No.2
Objectives: The purpose of this study was to evaluate and report the antibacterial efficacy in relation to oral disease-causing bacteria using a mouthwash containing 0.05% CPC in an in vitro test. Methods: The sterilization test and susceptibility assay of mouthwash containing 0.05% CPC were investigated against Streptococcus mutans, Streptococcus sobrinus, and Lactobacillus acidophilus; Streptococcus sanguinis as oral bacteria related to dental caries; Enterococcus faecalis as apical periodontitis-related bacteria; and Actinomyces israelii, Aggregatibacter actinomycetemcomitans, Fusobacterium nucleatum, Prevotella intermedia, Prevotella nigrescence, Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, and Filifactor alocis as periodontal disease-related bacteria. Results: In the sterilization test, most of the bacteria had more than 99.99% sterilizing power for all samples but compared to other bacteria, the sterilizing power of these samples was not successful for L. acidophilus and E. faecalis bacteria. When comparing the sterilization power between the samples, sample 3 (0.05% CPC+20% ethanol) was the strongest. Conclusions: In the antimicrobial activity test, sample 3 inhibited growth at the lowest concentration overall.
초등영어 학습자의 정보처리 단위의 크기와 영어능력의 상관관계 분석
조원호(Cho, Won-Ho, 손중선(Sohn, Joong-Sun) 한국초등영어교육학회 2009 초등영어교육 Vol.15 No.3
This study was intended to investigate the correlation between the information unit size in the language process, the speaking speed, the STM capacity and the English communicative proficiency of elementary school students In this study, 62 elementary 6™ graders were tested as subjects This study consists of three stages Stage one was to test the STM capacity of the subjects Stage two measured the information unit size in the language process and the speaking speed Stage three tested the students' English communication proficiency which consisted of speaking and listening skill After these three stages, the correlations of the parameters were examined using SPSS 12? window package The results of this study were as follows First, if the size of the unit of information process was increased by chunking, the speaking speed and the STM capacity for English were increased Second, the communicative proficiency was increased as the information unit size increased The implication from this study for the elementary English teaching process could be briefly noted as follows, (1) The main focus of elementary English teaching should be always on the sentence or thought group level, and the word level teaching is advised to be designed as supplementary to the main focus, (2) As a way of increasing the information unit size, chants, song, games or dramas would be a good choice to give a situation for chunking information in a meaningful context