• 임상간호연구
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• 제17권3호
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• pp.363-374
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• 2011

Purpose: The purpose of this study was to identify the types and causes of non-value-added (NVA) activities in nursing practice, and to determine the frequency of each NVA type and causes of NVA in clinical area. Methods: This study was conducted using Delphi technique. First, in order to identify NVA and their causes, 24 nurses with 7 years or more of clinical experience were recruited from medical/surgical units in six general hospitals in Korea. Then the NVA types and causes were tested using a larger sample of 130 nurses with more than 3 years of clinical experience at two general hospitals in Korea. Results: NVA was categorized into 6 different types, which are repeating, duplicating, waiting, reverse-proxy working, reworking, and searching. The most prevalent NVAs were repeating and duplicating works. Reworking and searching were less frequent types than others. The causes of NVA were classified into personnel-related, supporting departments, records, regulations, information, materials or instruments, and others. Among them, personnel-related and supporting departments were reported with the highest scores. Conclusion: NVA leads to waste cost and time. These results demonstrated the situations and causes of NVA occurred in nursing practice. Further studies on the typology and moderation of NVA activities are warranted to improve the efficiency and quality of nursing care in day-to-day practice.

• Educational Technology International
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• 제20권1호
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• pp.57-81
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• 2019

This study aimed to investigate effects of peer feedback types and feedback acceptance levels on academic achievement in project-based learning. The participants were 70 middle-school students taking an English course. They were divided into corrective and suggestive feedback groups. These participants were asked to create user-created content (UCC) as an individual task and provide peer feedback on a peer's UCC in the same type of feedback group. Results showed that there were significant differences in academic achievement according to peer feedback types (corrective vs. suggestive) and feedback acceptance levels (high vs. low). In particular, the suggestive peer feedback group had higher academic achievement than the corrective peer feedback group. Moreover, the group with a high level of feedback acceptance gained higher academic achievement than the group with a low level of feedback acceptance. Moreover, there was an interaction effect between peer feedback types and feedback acceptance on academic achievement. These results indicate that peer feedback types and feedback acceptance should be considered for effective peer feedback activity. These findings provide practical implications for the design and implementation of peer feedback activity in project-based learning.

• The Korean Journal of Ecology
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• 제17권2호
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• pp.171-183
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• 1994

Soil condition, total number of bacteria, soil amylase activity and microbial biomass $(CO_2-C)$ were measured at soil of different forest types. And the difference of the allelopathic effect was determined between fresh leaf extract of Quercus acutissima and Pinus rigida to the bacteria isolated from soil of different forest types. 1. Total number of bacteria in Carpinus laxiflora forest soil was 4~7 times larger than that in pinus desiflora forest soil. 2. Soil amylase activity was positively correlated with total number of soil bacteria and soil organic matter content. The amylase activity at F layer was 4~5 times larger than that at H layer, and that at H layer was 2~4 times larger than that at A layer. 3. Seasonal changes of microbial biomass showed a peak in summer, and vertical distribution of microbial biomass decreased with increasing soil depth. The microbial biomass in Pinus densiflora forest soil was larger than that in Quercus serrata forest soil. 4. Fresh leaf extract of Pinus rigida and Quercus acutissima showed an acceleration or inhibition effect on the growth of soil bacteria, and that of !. acutissima inhibited larger number of soil bacterial strains than that of P. rigida. 4.2% and 25% of soil bacterial strains isolated from soil of P. rigida and Q. acutissima forests were inhibited by fresh leaf extract of P. rigida and Q. acutissima, respectively.

• 한국발생생물학회지:발생과생식
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• 제8권1호
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• pp.43-47
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• 2004

낙동강 하구역에서 1년 동안 채집한 붉은줄참새우, Palaemon macrodatylus를 대상으로 안병에 분포하는 신경성 분비세포의 형태적 특징 및 계절별 분비 활성 변화를 살펴보았다. 안병의 신경계는 신경세포층(lamina ganglionaris), 외수(medulla externs), 내수(medulla interns) 및 종수(medulla terminalis)로 구성되어 있다. 그리고 안병에서 관찰되는 신경성 분비세포는 A, B, C, D세포 등으로 구분되었고 이들의 형태학적 특징은 다음과 같다. A세포의 직경은 약 10 $mu extrm{m}$전후로 주로 외수에 세포군을 이루어 분포하고 있으며, B세포의 직경은 6 $\mu\textrm{m}$전후로 가장 작은 세포이고 핵질이 세포질에 비해 크다. 그리고 C세포의 직경은 15∼20 $\mu\textrm{m}$로 둥근핵을 가지며 내수와 종수에서 B세포와 세포군을 이루어 분포하고 있으며, D세포의 직경은 약20∼30 $\mu\textrm{m}$로서 관찰되는 세포중 가장 크며 타원형의 형태를 보이고 있다. 이들 신경성 분비세포의 계절별 분비 활성 변화를 살펴본 결과,3-4월의 개체에서 A, B및 C세포는 활성화되기 시작하여 6∼7월에는 대부분의 개체에서 활성적인 신경성 분비세포를 가진 것으로 나타났다 그러나 8월 이후 대부분의 개체에서 비활성적인 신경성 분비세포를 가지는 것으로 관찰되었다.

• 한국생활과학회지
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• 제20권3호
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• pp.533-544
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• 2011

The purpose of this study was to investigate the effect of different types of leisure activities' on the satisfaction and psychological well-being of primary school students. The subjects of this study consisted of 467(boys=191, girls=276) primary school students. The data was analyzed by one way ANOVA, factor analysis, Chi-square analysis, correlation analysis and multi-regression analysis. The main findings of this were as follows: first, there were statistically significant differences in the kinds of activities participated in according to gender. Second, among of the subscale of leisure satisfaction, boys showed higher scores in more education and physical satisfaction than girls, and in the subscale of psychological well-being, boys indicated a higher score in flow and happiness than girls. Third, there were significant differences in leisure satisfaction and psychological well-being in the types of leisure activity. Fourth, the participation motivation of leisure activity statistically influenced psychological well-being. Fifth, leisure satisfaction partially influenced on psychological well-being. Social and environmental satisfaction significantly influenced flow. Education and social satisfaction significantly influenced happiness and psychological well-being.

• 영어어문교육
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• 제12권4호
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• pp.253-276
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• 2006

The purpose of this study is to compare and analyze the aspects of task-based materials in high school English textbooks for first year students in Korea. Based on the theoretical backgrounds for designing communicative tasks and the basic contents of the 7th national curriculum for English, a total of six different qualitative evaluation categories of task-based materials are constructed. The six categories include input data, settings, activity types, language skills, activity themes, and communicative functions. The results of the data analysis showed that the regulations of the 7th national English curriculum, which were aimed at improving the students' communicative abilities, were properly reflected in the materials of task-based activities of all textbooks. On the other hand, a few problems were found in some textbooks: too many individual tasks; being out of proportion in presenting task types and themes; non-systematic introduction of language skills, etc. To conclude, a few suggestions are made to provide some meaningful considerations for the text material developers in order to produce better textbooks in the future: task goals and rationale that encourage the learner's positive motivation; authenticity of input data based on the real-world context; a collaborative learning environment that enhances communicative interaction; a proportional representation of the various activity types including creative problem-solving procedures; systematic introduction of integrated language skills, etc.

• 약학회지
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• 제17권3호
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• pp.137-140
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• 1973

Antimicrogbial activity of Veratrum alkaloids against Pityrosporum ovale. Trichopyton mentagrophytes, and Saccharomyces cerevisiae were investgated. Of the alkaloids tested, only jervaeratrum alkaloids exhibited antimicrobial activity. The most basic structural requirement for activity of jerveratrum alkaloids is mainly due to the introduction of an oxygen in ring C regardless of the difference in structural types. Glucoside is more active than alkamine, suggesting the assistance in the trasport processes.

• 한국의류산업학회지
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• 제11권6호
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• pp.911-917
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• 2009

The purpose of this study was to investigate muscle activity of the lower limbs when walking in jeans in order to obtain basic information for development of new jeans patterns with excellent movement adaptability. Using three types of jeans (basic, medium, and slim) with different ease on hip, knee circumference, and crotch length, and two different types of shoes, Electromyogram (EMG) of the lower limbs muscle was measured for four healthy subjects walking on treadmills and stairs. EMG of vastus lateralis, semitendinous, tibialis anterior and medial head of gastrocnemius muscles was measured. The muscle activity was assessed in RMS (Root Mean Square) value of the EMG. On the treadmill in sneakers, only the vastus lateralis muscle showed a significant difference in RMS value depending on patterns. Basic and medium jeans allowed higher muscle activity than trunks of slim jeans did. On the treadmill in high heels and slim jeans, the RMS values of all muscles were significantly smaller than in basic jeans, whereas no significant differences were shown while in trunks or medium jeans. On the stairs either in sneakers or in high heels, no significant differences were shown between all muscle activities for all types of jeans. On the treadmill, greater fatigue was induced in all muscles from walking in high heels than in sneakers for all jeans patterns. When walking on the stairs wearing either type of shoes, however, the effect of jeans pattern on muscle activities was different from muscle to muscle.

• Journal of Plant Biology
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• 제37권1호
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• pp.17-25
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• 1994

Two potato (Solanum tuberosum L.) cultivars were transformed by Agrobacterium tumefaciens harboring cauliflower mosaic virus (CaMV) 35S promoter and $\beta$-glucuronidase (GUS) gene. Expression patterns of the CaMV 35S promoter according to tissue types and developmental stages, and genetic stability of GUS gene were investigated in the clonal progenies of transgenic potatoes. Kanamycin-resistant shoot emerged from tuber disc after 4 weeks of culture, and root was induced 6 weeks after culture on the selection medium. Shooting frequency of cvs. Superior and Dejima were 43% and 27%, respectively. Mature transformants and their clonal progenies showed no phenotypical abnormality. GUS activity was expressed primarily at parenchymatous cells of phloem tissue around the vascular cambium in the stem and root, and higher activity was found at the apical meristem of shoot, root and adventious shoot bud. GUS activity was higher at tubers of young explants than at stored tubers. These facts indicate that expression level of the CaMV 35S promoter differed according to tissue types and developmental stages of the organs. The GUS gene was stably inherited to each clonal progeny and normally expressed.

• 한국자원식물학회지
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• 제5권2호
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• pp.73-84
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• 1992

Many types of compounds have been isolated from higher plants till now, that is, alkaloids, terpenes, lignans, steroids and so on. One of them, named as RA series Cyclic hexapeptides isolated from Rubia akane and R. cordijofia also have strong antineoplastic activity against various types of tumors. Till now 10 kinds ofRA series compounds were isolated and named as RA - I, II, III, IV, V, VI, VII, VIII, IX and X. Moreover,monogl-ucoside of RA - V newly Isolated from same plant. Many kinds of derivatives including natural RAcompounds were tested for QSAR, and one of them, RA - VII was screened up as a most suitable substance asan antitumor agent. RA - VII(=RA-700) has strong cytotoxic activity against KB cells, P388 Iymphocyticleukemia and MM2 mammary carcinoma cells. RA - VII has been under investigation for Phase I clinical trials.