• International Journal of Highway Engineering
• /
• v.10 no.2
• /
• pp.91-100
• /
• 2008

The quality of service on urban roadways have been evaluated mainly based on such quantitative measures as travel speed and delay. However, in addition to the quantitative aspects, drivers traveling on urban roadways are subject to be influenced by qualitative measures such as aesthetic aspects of the roadway and other drivers' violation of traffic laws. Based on this notion, this study attempts to identify roadway service quality indices, considering both qualitative and quantitative aspects and evaluate the quality of service using the modified Importance-Performance Analysis (IPA), a technique often applied in the field of marketing. The modified IPA is proposed in this study as a way to evaluate the service quality, reflecting the relative performance between study areas and performance indices. A case study is implemented over the Gangnam and Gangbuk areas in Seoul, resulting in identifying the items needed to be improved for each study area.

• Journal of The Korean Association For Science Education
• /
• v.21 no.3
• /
• pp.558-565
• /
• 2001

The purpose of present study is to examine the science attitude level of middle school, high school and university students, and to provide the suggestions for science education. Instrument to invent science attitude consists of four domains as 'Scientific Inquiry', 'Importance of Contribution to Science', 'Normality of Scientist', and 'Social Value of Science'. Inventory instrument have 20 items(Likert scale of 1 to 5). Subjects are 70 middle school, 72 high school, and 95 university students. There is no significant difference among students by school, but the attitude level toward science of female students is lower than that of male students. 'Importance of Contribution to Science' among four domains has the highest score of attitude toward science, whereas 'Normality of Scientist' has the lowest attitude score toward science. To bring up scientific abilities of students, we conclude that it needs the educational plan to increase science attitude of students, through improving and developing curricular system and science curriculum for the secondary school and university.

• School Mathematics
• /
• v.9 no.2
• /
• pp.223-240
• /
• 2007

The purpose of this study was to investigate the degree to which the middle school mathematics curriculum matched the item difficulty levels of representative mathematics items. The items used in this study were developed for the National Assessment of Educational Achievement. Ranks for difficulty values of the 60 multiple-choice item were calculated via both Classical Test Theory and Item Response Theory and correlated with the rank order of the mathematics content and cognitive domains sequence. There are six content domains; number and operation, algebra, measurement, figure, pattern and function, and probability and statistics. The cognitive domains include computation, understanding, reasoning and problem-solving. Results suggest a congruence between cognitive domain's sequence and item difficulty levels of items based on that sequence. This finding indicates that the linear or hierarchical assumptions concerning the sequence appears to be reasonable. The characteristics of items that were exceptions to this trend were addressed.

• Journal of Educational Research in Mathematics
• /
• v.13 no.2
• /
• pp.159-178
• /
• 2003

This study analyzes on the reasoning in the process of justification and mathematical problem solving in our primary mathematics textbooks. In our analyses, we found that the inductive reasoning based on the paradima-tic example whose justification is founnded en a local deductive reasoning is the most important characteristics in our textbooks. We also found that some propositions on the properties of various quadrangles impose a deductive reasoning on primary students, which is very difficult to them. The inductive reasoning based on enumeration is used in a few cases, and analogies based on the similarity between the mathematical structures and the concrete materials are frequntly found. The exposition based en a paradigmatic example, which is the most important characteristics, have a problematic aspect that the level of reasoning is relatively low In Miyazaki's or Semadeni's respects. And some propositions on quadrangles is very difficult in Piagetian respects. As a result of our study, we propose that the level of reasoning in primary mathematics is leveled up by degrees, and the increasing levels are following: empirical justification on a paradigmatic example, construction of conjecture based on the example, examination on the various examples of the conjecture's validity, construction of schema on the generality, basic experiences for the relation of implication.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.13 no.9
• /
• pp.3915-3923
• /
• 2012

Prior research has shown empirically that social capital is as a critical factor determining organizational effectiveness. The purpose of this study is to examine the relationship between the social capital, social workers' job satisfaction and organizational commitment in the social welfare organization. For the research, social capital was consisted of trust, norms and network. The results of this study were summarized as follows: Mean analyses showed that social workers perceived the level of social capital had a higher than medium. By using a structural equations modeling(SEM), trust and norms had a positive effect on the social workers' jon satisfaction and organizational commitment. This study finally discusses theoretical implications for future study and practical implications for social capital strategies on the results.

• Journal of the Korea Organic Resources Recycling Association
• /
• v.6 no.2
• /
• pp.31-44
• /
• 1998

Mixtures of hog manure slurry and sawdust were composted by an intermittent aeration method to verify the performance evaluation of pilot-scale reactor vessels during composting high rate (decomposition) process. Instrumentation was designed to measure temperatures in compost, oxygen and carbon dioxide concentration, air flow rates, and ammonia gas emitted. It was found that ammonia concentration during composting high rate decreased more quickly to the allowable range of 34-40 ppm after 14days at near the optimal levels (II) than in the case of lower levels (I). The influence of the optimal levels (II) such as moisture content (55-65%), C/N ratio (20-40), pH (7-8) and temperature in compost (<$60^{\circ}C$) on the reduction of ammonia gas was considerable for commercial composting.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2007.11a
• /
• pp.397-407
• /
• 2007

In this paper, We judge War Potential of Defense Sufficiency Task Croup Using Agent-Based Modeling and Simulation(ABMS) and indicate the Republic of Korea Navy's future. We use ABMS model, Map Aware Non-uniform Automata(MANA), to be obtained the results. To overcome future threat of Japan and China in a sea around the Korean Peninsula. War Potential of Defense Sufficiency Task Group are to be at least 4KDX-III and $20{\sim}24$KDX-II. Therefore, Republic of Korea Navy have to increase the war potential scales, $11{\sim}15$ battleship with future including build-up plan of present war Potential and Improve The battleship' performance not less than that of KDX-II.

• School Mathematics
• /
• v.5 no.1
• /
• pp.27-42
• /
• 2003

The current 7th National Mathematics Curriculum had been developed as a learner-centered curriculum and begun to apply to high school since 2002. This paper discusses issues related to the high school mathematics curriculum application into high school. The mathematics curriculum for grades 11 and 12 was developed primarily as a learner-centered one to provide five elective courses according to the needs of students based on their future occupation and attitudes. Discussion starts with the differences of the five elective courses: the three of them have dependent and sequential structure and the two are totally different with regards to their levels of difficulty and the content they span. It is claimed that the frameworks of the 2005 National Ability Test for the College Entrance and the minimal enrollment requirements of several influential colleges' admission policy make the high school mathematics education very rigid, unflexible, and anti-educational. Several suggestions to recover and imp-rove the high school mathematics education and the spirit of the 7th curriculum are presented.

• Journal of Educational Research in Mathematics
• /
• v.17 no.1
• /
• pp.51-66
• /
• 2007

The purpose of this study is to analyse the cases of the posed problems while the mathematically gifted students are playing the NIM game. The findings of a qualitative case study have led to the conclusions as follows. Most of all mathematically gifted students in the elementary school are not intend to suggest the solutions of the posed problem unless the teacher or the 'problem is requested. But a higher level of promising children were changing each data components of a problem in a consistent way and restructuring the problems while controlling their cognitive process. This is compared to that a relatively lower level of promising children tends to modify one or two data components instantly without trying to look at the whole structure. And we gave 2 suggestions to teach the mathematically gifted students in the problem posing.

• The Journal of the Korea Contents Association
• /
• v.18 no.9
• /
• pp.606-613
• /
• 2018

The purpose of this study is to investigate on Humint, one of the intelligence activity conducted by police officer to prevent the possibility of crime in advance and to handle crime in short time. Also, this study aims to identify how interpersonal relationship of police influences Humint acquisition in order to find out the influence of Humint on actual policy activity. For completion, this study conducted survey on current police officer and developed the study based on these data. Humint refers to information acquired by contact between people and to information acquired by intangible contact. Humint, the intangible information, is delivered fast and identifies the other's hidden intention. Humint also approaches inaccessible information and has strength of acquiring information based on five senses instead of using machine. Humint plays vital role in human relations. The investigation on the influence of level, trust, and range of human relations on Humint application demonstrated that people with wide human relations applied Humint effectively on identifying trend. Also, people with wide range of human relations used Humint effectively when utilizing information to handle the crime.