• Journal of the Korean Society of Earth Science Education
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• v.2 no.1
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• pp.33-40
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• 2009

The purpose of this study is to examine the effect of higher grades in elementary the science process skill and Academic Achievement by IIM. To verify research problem, the subject of this study were five-grade students selected from One classes of an elementary school located in Ulsan : the experimental group is composed of thirty-four students who were participated in IIM teaching model situation. During six weeks, the IIM learning-based instruction was executed in th experimental group. Post-test showed following results: First, the experimental group showed a significant improvement in the science process skill. We look into detailly this, the experimental group showed a significant improvement in the basis science process skill. In particular, The sub-factor 'Observation', 'Measurement', 'expectation' of the science process skill effects a significant improvement. Second, the experimental group did showed a significant improvement in the Academic Achievement. In conclusion, IIM teaching model was more effective on science process skill and Academic Achievement. However, since the study has a limit on an objet of the study and the applied curriculum, the additional studies need to be conducted with an extended comparative group and curriculum.

• Korean Journal of Ecology and Environment
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• v.41 no.2
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• pp.128-136
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• 2008

An attempt was made in the Veeranam freshwater lake with the objectives to collect, identify, describe and document the algae occurring from March 2007 to August 2007. Qualitative and quantitative characterization of phytoplankton and analysis of physico-chemical parameters of water samples were carried out at monthly intervals during the study period in the western and eastern sides of the lake. It was found that the phytoplankton community embraced 68 genera belonging to four classes viz., Bacillariophyceae (40), Chlorophyceae (22), Cynophyceae (4) and Euglenophyceae (2). There were significant influences of various physico-chemical parameters on the phytoplankton population density. Commonly occurred genera, Oscillatoria (Cyanophyceae), Navicula (Bacillariophyceae) and Scenedesmus (Chlorophyceae), were subjected to energy dispersive spectroscopic analysis (EDS). They were found to accumulate different elements such as Zn, P, S, Ca, Mg, Fe, N, Si, Cl and Mn. Among these the member Cyanophyceae contained Zn, P, Mg, Ca, Mn, S and N. Bacillariophyceae Si, Zn, Mg, Cl, N, Fe, and Ca. Chlorophyceae Ca, Mg, N, Fe, Cl, Zn, Si and Mn. Thus these observations would determine the chemical dialogue between the cell structures and role of the elements. Further, it gives the clue about the phytoplankton growth requirements.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.1
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• pp.9-17
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• 2003

The purpose of this study was to investigate whether customers' fashion involvement, brand familiarity, and expertise of negative information moderate the influence of the original brand attitudes on the attitude toward extended brand attitudes in the fashion market. For these purposes, four hypotheses were developed and data was collected from 480 students. Data was analyzed using SPSS methods such as factor analysis, frequency, 1-test, and moderated regression analysis. The results were as follows; first, it was found that the original brand attitudes positively influence the extended brand attitudes. Second, the influence of the original brand attitudes on the extended brand attitudes was stronger when fashion involvement was high rather than low. Third, in the case that perceived similarity between the original and the extended product classes was high, the influence of the original brand attitudes on the extended brand attitudes was stronger when brand familarity was high. Fourth, the influence of original brand attitudes on the extended brand attitudes was stronger when the perceived expertise of negative information source on the extended brand was high. Therefore, the results suggest that extending brands requires the systematic brand management considering customers' variables such as fashion involvement, brand familiarity, negative information etc. Also, it seems that the brand strategy should be based on the segmentation for targeted customers' characteristics.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.18 no.12
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• pp.1345-1351
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• 2007

This paper proposes a polarimetric SAR image classification technique based on the degree of poarization(DoP) and copolarized phase-difference(CPD) statistics. At first, the formulation for the DoP and CPD is derived. Then, the classification technique is verified with the SAR full polarimetric L-band data with consideration of exceptional cases. The technique has capability of classifying SAR data into four major classes, such as bare surface, short-vegetation canopy, tall-vegetation canopy, and village.

• The Korean Journal of Malacology
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• v.13 no.1
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• pp.71-90
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• 1997

A soudy on the distrobution and seasonal changes of the benthic macrovertebrates community was performed on the 5 intertidal rocky shores of Chujado in the Cheju-Channel during four seasons from March 1996 to February 1997.The macroinvertebrates identified in Chujado totally composed of 9 phyla, 18 classes, 38 orers, 147 species. The macroinvertebrates idetified according to the stations were 9 phyla, 138 species in Sinyangri(ST. 1); 8 phyla, 134 species in Younghungri(ST. 4);and 8 phyla, 131 species in Daeseori(ST. 5); The species diversities of the lower intertidal zones were higher than those of middle and upper intertidal zones, however, the seasonal appearance in number of species was not different among the stations. The vertically distributed dominant species in intertidal zone were; Nodifittorina exigua and Nerita japponica in the supralittoral zones; Monodonta labio labil and Buccinulum ferrea in the upper zones; Septifer keenae and Lunella coronata corensis in the middle zones; Purpura clavigara, S. keenae and Pomatoleios krausii in the submiddle zones; and Actinia mesembryanthemum, Tetracliata squamosa japonica and N. schrenckii in the lower zones. The intertidal community structures between Chujado and Cheju coast showed that Chujado composed of fewer number of species and lower value of species diversity and richness indices than Cheju coast.

• The Korean Journal of Malacology
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• v.23 no.1
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• pp.65-104
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• 2007

This catalogue is the result of a four-year survey of the mollusks of Jeju Island, the southernmost island in the Republic of Korea. Forty-eight survey stations were visited, with a total of 82 specific localities being sampled. Literature records were also obtained. Local and world distribution of each species is included. This survey reports a total of 1,072 mollusk species and subspecies; 1,015 marine and 57 land and freshwater. There are 812 gastropods, of which 755 are either entirely marine or have marine affinities. The best represented of the marine families are the Pyramidellidae, Trochidae, and Ovulidae. There are 225 bivalves, none being freshwater species, with the Veneridae, Mytilidae, and Arcidae having the largest number of species. Among the smaller classes there are sixteen Cephalopoda, eleven Polyplacophora, and eight Scaphopoda. Compared to mainland Korea, Jeju Island has a rather small terrestrial mollusk fauna and a depauperate freshwater one, with mainly Palearctic connections. The Helixarionidae and Bradybaenidae are the largest terrestrial families. The marine faunal affinities with the neighboring Japonic and Indo-West Pacific provinces are also discussed, revealing that this island's mollusk fauna is a blend of warm-temperate and subtropical-tropical species.

• Journal of the Korean Chemical Society
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• v.36 no.1
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• pp.113-124
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• 1992

The pattern recognition methods of chemometrics have been applied to multivariate data, for which ninety four Korean ancient glass pieces have been determined for 12 elements by neutron activation analysis. For the purpose, principal component analysis and non-linear mapping have been used as the unsupervised learning methods. As the result, the glass samples have been classified into 6 classes. The SIMCA (statistical isolinear multiple component analysis), adopted as a supervised learning method, has been applied to the 6 training set and the test set. The results of the 6 training set were in accord with the results by principal component analysis and non-linear mapping. For test set, 17 of 33 samples were each allocated to one of the 6 training set.

• Journal of the Korea Society of Computer and Information
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• v.4 no.4
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• pp.113-119
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• 1999

Recently, design patterns have been known to be highly effective and practical. Design pattern is a collection of collaborating classes that captures the application independent behavior of system in a particular domain. By using design pattern, the development time and software quality can be greatly increased. However, systematic development process and detailed instructions of building design patterns have not been studied enough. In this paper. we propose practical intranet structure modeling technique that are based on design pattern. The proposed process consists of the four typical software development phases; analysis, navigation, interface, behavior domain design, and each phase is defined as a logical sequence of development tasks. Since the proposed process is based on design pattern foundation, and can be efficiently produced by applying this process.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.3
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• pp.37-42
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• 2011

Nowadays software developers are moving from conventional software process technologies to the object-oriented paradigm. To develope the object-oriented softwares efficiently, various software metrics have been suggested. Coupling refers to the degree of independence between components of the system. It has long been well known that good software practice calls for minimizing coupling interaction. Many researches have been studied coupling metrics of the object- oriented systems. We review Chidamber and Kemerer's work & Li's work. In this paper, we study the coupling of the overall structures of object-oriented systems by analyzing the class diagram of UML. We propose four coupling metrics for object-oriented softwares. First, we use an established coupling metric for object- oriented systems as a basic coupling metric. Then we modify the basic coupling metric by including indirect coupling between classes, We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to a practical case study. This coupling metric will be helpful to the software developers for their designing tasks by evaluating the coupling metric of the structures of object-oriented system and redesigning tasks of the system.

• Journal of Korean Elementary Science Education
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• v.20 no.2
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• pp.217-228
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• 2001

The purpose of this study was to investigate the effect of learning cycle model on the changes of electricity conceptions of elementary students. Four classes in forth grade of an elementary school in Busan were selected and two of them were served as experimental group and the others as control group. The experimental group were taught the unit of "Light an electric bulb" in elementary science textbook with teaching model based on teaming cycle and the control group with traditional teaching style. The instruction effects were analyzed through pre and post-test results using questionnaire on the electricity. The results of pre-test showed that there was not a significant difference between experimental group and control group at .05 level, so two groups could be regarded as homogeneous. The mean score of experimental group was significantly higher than that of control group on the post-test at .05 level. And within-group comparison revealed that both groups made improvement on the mean score and that the improvement of each group had significant difference at .05 level. Above results said that the teaching model based on learning cycle, which focuses on hands-on activity and considers each student as an active subject, was more effective than traditional teaching style in improving the formation of scientific conceptions on electricity.ectricity.