• Journal of The Korean Association For Science Education
• /
• v.38 no.2
• /
• pp.249-257
• /
• 2018

The purpose of this study was to analyze the knowledge and ability levels of middle school students in four areas: conceptual understanding, argument construction, justification schemes, and use of scientific knowledge in a causal explanation for a genetic phenomenon. A group of 162 middle school students who have taken a class titled Genetics and Evolution participated in the study. Each student answered-and justified the answer to-one question pertaining to genetics. Ability levels were rated from level 0 to level 4, with 4 being the top rating. Students were required to choose one of two competing arguments to explain whether green seed pimps and red seed pimps of the same size and shape were the same species or not. Analyzing conceptual understanding: 47% of the respondents provided the correct answer. Analyzing their abilities for constructing an argument: 75% of the students with the correct answer and 42% of the students with the incorrect answer were evaluated to be at ability level 3 or 4 for argument construction. Analyzing the students' justification schemes: "Scientific idea" and "Analogy" were the most frequently used schemes. Analyzing their use of scientific knowledge: of the students who selected the scientific idea justification scheme, 36% used the correct scientific knowledge, but the remainder used inaccurate or nonspecific scientific knowledge. These findings provide implication for encouraging argumentative writing explaining scientific phenomena regarding epistemic practice.

• Korean Journal of Construction Engineering and Management
• /
• v.8 no.3
• /
• pp.76-86
• /
• 2007

Construction development work invents profit as those finalize object, and a make or break success of project depends on correct analysis and forecast business feasibility at project early. Business feasibility study would be decision-making under precarious situation because is connoting uncertainty that is future. estimate at present visual point essentially. Under uncertainty, a decision-making method is based on probability theory of statistics, but business feasibility study had applied with not feasibility study by probabilistic decision method but it by determinism derision method so far. Therefore in this study doing decision-making by a probability theory method for successful project at early business feasibility study, it present a probabilistic study method that use simulation that can supply a little more correct and reliable data to decision-maker As result, a probabilistic study method is more suitable than deterministic study method as technique for a financial feasibility study of construction development work. Making good use of this probabilistic study method at important business or careful decision-making, because efficient Judgment that is based accuracy and authoritativeness may become available.

• Phonetics and Speech Sciences
• /
• v.1 no.3
• /
• pp.109-115
• /
• 2009

Many isolated word recognition systems may generate non-similar words for recognition candidates because they use only acoustic information. In this paper, we investigate several techniques which can exclude non-similar words from N-best candidate words by applying Levenstein distance measure. At first, word distance method based on phone and syllable distances are considered. These methods use just Levenstein distance on phones or double Levenstein distance algorithm on syllables of candidates. Next, word similarity approaches are presented that they use characters' position information of word candidates. Each character's position is labeled to inserted, deleted, and correct position after alignment between source and target string. The word similarities are obtained from characters' positional probabilities which mean the frequency ratio of the same characters' observations on the position. From experimental results, we can find that the proposed methods are effective for removing non-similar words without loss of system performance from the N-best recognition candidates of the systems.

• English Language & Literature Teaching
• /
• v.8 no.1
• /
• pp.85-102
• /
• 2002

Learners and users of a second language have to resort to a variety of conversational strategies or structures to enable them to communicate effectively and competently. Factors affecting effective communication among English as a second or English as foreign language (ESL/EFL) learners are diverse in nature because of different socio-cultural backgrounds. Gambits as a conversational strategy are used to a large extent and teachers must be made aware of such conversational strategies used by English as second or foreign language learners. Thus, studies focusing on conversational strategies among ESL/EFL learners in the English language classroom are important in order to identify the types of conversational strategies used and to help teachers to understand the appropriate conversational strategies and structures. Such understanding can be used to guide learners to use correct conversational strategies when communicating in English. The purpose of this paper is to highlight the use of gambits as a communication strategy in conversation among non-native speakers of English in an English as a second language(ESL) context based on Kellers conversational strategy signals. (175 words)

• Journal of the Korean Society for Precision Engineering
• /
• v.16 no.3 s.96
• /
• pp.53-61
• /
• 1999

STL has several errors such as orientation error, hole error, and acute triangle error on being translated from CAD software. These errors should be corrected before using in Rapid Prototyping. So the software is necessary to correct errors. In this study, STL Editor which is a system for STL error correction and shape modification is developed and contains following characteristics. 1.Apply the triangle based data st겨cture. 2.Use the graphic user interface for easy work. 3.Use the Diet method to reduce data size. 4.Use the Delaunay triangulation method to enhance the quality of STL. 5.Modify the STL errors manually.

• The Journal of the Korean dental association
• /
• v.57 no.3
• /
• pp.175-184
• /
• 2019

Increasing the aesthetic needs of patients and decreasing the use of amalgam had led to increased demand for dental resin composite. Thereby, light curing unit (LCU) has become an essential equipment in dental clinic. To ensure long-term prognosis of photopolymerized materials, LCU should have a uniform and consistent radiant output and an emission spectrum that includes the active wavelength range of photoinitiators. In addition, when the correct use and thorough maintenance and repair of LCU are performed, the higher success rate of restoration using photopolymerization materials will be achieved.

• The Korean Journal of Health Service Management
• /
• v.7 no.3
• /
• pp.237-249
• /
• 2013

This study was done to investigate status of polypharmacy and inappropriate medications use of the elderly of in nursing homes. The subjects of this study were 270 elderly people in the nursing homes of G city and K city, In this study, the medications were classified by Anatomical Therapeutic Chemical (ATC) code, polypharmacy was defined as taking medications more than five, and inappropriate medications use were identified by Beers criteria. Data was analyzed by using descriptive statistics, t-test and one-way ANOVA. Total number of drug types in this study was the average $6.1{\pm}2.6$. The subjects with polypharmacy were 193(71.5%), and with inappropriate medications use were 138(51.1%). There was a significant difference in the polypharmacy according to the number of diseases(p<.001) and in the inappropriate medications use according to age(p=.018). Baesd on this study, polypharmacy and inappropriate medications use of elderly people were main problems that need to carefully assess for safe and correct medication usage in nursing home. Therefore, an ongoing medication monitoring system is necessary to minimize the adverse drug reactions of elderly.

• Korean journal of food and cookery science
• /
• v.29 no.6
• /
• pp.795-803
• /
• 2013

This study examined the usage, perception and willingness to use beef traceability. The data were collected from 255 housewives in Busan and Gyeongnam region through a self-administered questionnaire. Frequency, Cronbach's ${\alpha}$, t test, one-way ANOVA, Duncan's multiple range test, Pearson's correlation analysis, and multiple regression analysis were conducted by SPSS Windows V.20.0. Only twelve percent of the respondents experienced to use beef traceability. Most respondents checked it by kiosk or bar code reader in a store. On the other hand, eighty-eight percent did not use beef traceability. The reasons for not usage of it were "Do not know beef traceability very well", "Do not know how to use beef traceability", and "Information from packing or counters is reliable" in order. In the level of perception of beef traceability, safety assurance was highest, followed by information quality, usefulness, and information accessibility. The percentage of correct answers of knowledge about beef traceability was not high. The multiple regression analysis showed that employment status, knowledge about beef traceability, information quality, information accessibility, and usefulness were significant factors to affect the willingness using beef traceability.

• The Journal of Korean Physical Therapy
• /
• v.32 no.4
• /
• pp.198-202
• /
• 2020

Purpose: This study examined the effects of a paraffin treatment with exercise on the muscle strength and fatigue of the hand according to the use of smartphones. Methods: The measurement subjects were 30 healthy males in their 20s who were divided randomly into the control and paraffin treatment groups. A typing exercise using a smartphone was performed. The pinch grip force was measured to evaluate the muscle strength of the thumb, and muscle fatigue analysis using electromyography was performed to analyze muscle fatigue. Results: The functional changes to the arm and the fatigue of the hand through the use of a smartphone were examined to determine the effects of the paraffin treatment. The dominant hand-pinch grip force test did not show a significant difference, but the non-dominant hand-pinch grip force test showed a significant difference between the groups (p=0.030). In the dominant hand fatigue test, there was a significant difference between the groups (p=0.037). In the non-dominant hand, there was a significant difference between time (p=0.012) and the groups (p<0.001). Conclusion: The effects of paraffin intervention on the hand muscle strength and fatigue due to repeated use of the smartphone were confirmed. These results can be used as a basis for clinical use and can be a guide for the correct use of smartphones, which are essential in modern life.

• Journal of Home Health Care Nursing
• /
• v.26 no.1
• /
• pp.51-63
• /
• 2019

Purpose: The objective of this study was to investigate mothers' perception of antibiotic use for their children. Methods: A cross-sectional survey was conducted of a convenient sample of 210 mothers who visited the two pediatric hospitals in D city. Descriptive statistics, t-test, analysis of variance, Kruskal-Wallis test, Mann-Whitney U test, and Pearson correlation coefficients with SPSS WIN 24.0 were used to analyze the data. Results: The perception of mothers on antibiotic use for their children was relatively low (3.28/5) and showed a statistically significant difference based on the mothers' educational background (${\chi}^2=15.30$, p<.001). About 57-77% of participants discontinued or reduced the dosage of the antibiotics if their children's symptoms were relieved, and about 60% of them perceived that antibiotics treat viral infections. Mothers' adherence to specific doses of antibiotics in their children was positively correlated with their knowledge and beliefs (r=.17, p=.014) and their attitude regarding the use of antibiotics (r=.17, p=.014). Only 1.4% of the participants had educational experience regarding the correct use of antibiotics. Conclusion: Based on the results, it can be concluded that an educational program for mothers should be developed and to verify its effects in order to induce proper use of antibiotics among mothers.