• Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
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• 2001.06a
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• pp.2111-2111
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• 2001

A chemoinfometrical method for evaluating the quantitative determination of crystallinity one polymorphs based on fourie-transformed near-infrared (FT-NIR) spectroscopy was established. A direct comparison of the data with the ones collected from using the and compared with the conventional powder X-ray diffraction method was performed. [Method] The pPure a and g forms of indomethacin (IMC) were prepared by reportedusing published methods. Six kinds of standard samples obtained by physically mixing of a and g forms. After the powder X-ray diffraction profiles of samples have been measured, the intensity values were normalized to against the intensity of silicon powder as the as an external standard. The calibration curves for quantification of crystal content were based upon the total relative intensity of four diffraction peaks from of the form g crystal. FT-NIR spectra of six calibration sample sets were recorded 5 times with the NIR spectrometer (BRAN+LUEBBE). Chemoinfometric analysis was performed on the NIR spectral data sets by applying the principal component regression (PCR). [Results] The relation between the actual and predicted polymorphic contents of form g IMC measured using by the X-ray diffraction method shows a good straight linen linear relation., and it has slope of 0.023, an intercept of 0.131 and a correlation coefficient of 0.986. PCR analyses wereis was performed based on normalized NIR spectra sets offer standard samples of known content of IMC g form. IMC. A calibration equation was determined to minimize the root mean square error of the predictionthe prediction. Figure 1 shows a plot of the calibration data obtained by NIR method between the actual and predicted contents of form g IMC. The predicted values were reproducible and had a smaller standard deviation. Figure 2 shows that the plot for the predicted transformation rate (%) of form a IMC to form g as measured by X-ray diffractomeoy against to those as measured by NIR method. The plot has a slope of 1.296, an intercept of 1,109, and a correlation coefficient of 0.992. The line represents a satisfactory correlation between the two predicted values of form g IMC content. Thus NIR spectroscopy is an effective method for the evaluation to the pharmaceutical products of quantitative of polymorph.

• Journal of Korea Water Resources Association
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• v.43 no.2
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• pp.153-165
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• 2010

Large-Scale Particle Image Velocimetry (LSPIV) is an extension of particle image velocimetry (PIV) for measurement of flows spanning large areas in laboratory or field conditions. LSPIV is composed of six elements - seeding, illumination, recording, image transformation, image processing, postprocessing - based on PIV. Possible error elements at each step of Mobile LSPIV (MLSPIV), which is a mobile version of LSPIV, in field applications are identified and summarized the effect of the errors which were quantified in the previous studies. The total number of elemental errors is 27, and five error sources were evaluated previously, seven elemental errors are not effective to the current MLSPIV system. Among 15 elemental errors, four errors - sampling time, image resolution, tracer, and wind - are investigated through an experiment at a laboratory to figure out how those errors affect to velocity calculation. The analysis to figure out the effect of the number of images used for image processing on the velocity calculation error shows that if over 50 images or more are used, the error due to it goes below 1 %. The effect of the image resolution on velocity calculation was investigated through various image resolution using digital camera. Low resolution image set made 3 % of velocity calculation error comparing with high resolution image set as a reference. For the effect of tracers and wind, the wind effect on tracer is decreasing remarkably with increasing the flume bulk velocity. To minimize the velocity evaluation error due to wind, tracers with high specific gravity is favorable.

• The Journal of the Korea Contents Association
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• v.13 no.10
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• pp.103-112
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• 2013

This study is the subsequent full-scale research to explore an undisputed top Korean TV drama writer, Su-Hyeon Kim, more profoundly, who has been out of scholarly pursuits. As it begins with discussing her mixed tendency by genre, we discuss about a useful reading method of the writer's relatively conservative genre, a home-drama. For the purpose of the study, it sets up the intertextuality theory. This study assents to that criticism of diminishing in its original meaning of M. Bakhtin's dialogism, which led J. Kristeva to name and fix the term. Therefore this paper mainly applies the Bakhtin's intertextuality theory to analyze common elements of the writer's and . Also it applies the G. Gennette's intertextuality of 'imprints' and 'transformation' between hypotext and hypertext to figure out their correlation. The analysis shows that the writer's home-drama realizes its mutual relationship and intersubjectivity of the Bakhtin's core intertextuality concept, which results in gaining viewers' popularity. And it also explains that the writer uses 'repetition' and 'transformation' method of intertextuality to contain its intended message in her own home-dramas. As the result of the study, to the writer, Su-Hyeon Kim, while a melodrama genre is for her fundamental inquiry of a 'privative', 'fractured' human being, a home-drama genre is for her message of the only solution of a 'family' to that inquiry with her own intention.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.738-747
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• 2021

Space and place have distinctively different meanings from each other. As virtual reality has become a routine of daily life, placeness concepts have been introduced on discussion tables. Yet, place has not been widely discussed in conceptual approaches Thus, using the concepts of space and place this study attempts to figure out the structure and the processes of how users recognize digital space and give placeness. For the study purpose, it identifies core elements of placeness attribution in digital game places, and then explains the development processes of space into place through characteristics of MDA(Mechanics-Dynamics-Aesthetics)framework. Based on present theoretical concepts and their application process this study also demonstrates the transformation process through which physical space becomes a place in the similar context with a necessary condition in order for a space to be a place. This study confirms that digital games can be transformed into a space that creates placeness in the process. Considering that players' affinity and nostalgia are generated through the placeness acquiring process in digital game space, the processes eventually imply an extension of largely meaningful and influencing contents as digital games induce players' immersion.

• Journal of the Korean Institute of Telematics and Electronics T
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• v.35T no.2
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• pp.86-92
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• 1998

In this paper, it is derived the system design parameters for the J-STD-018 of the PCS mobile station(MS) minimum performance using DS/CDMA analyzed the system performance due to the receiver components. The simulation shows the selectivity is -70.96dB at 1.25MHz frequency offset from the carrier frequency while the MS noise figure to satisfy J-STD-018 is 10dB and the input 3rd harmonics intercept point of the MS class I and MS class II-V is -9.5dBm and -14dBm respectively. When the interference power level at the receiver is small, the receiver has better performance as we increase the gain of LNA. However, when the interference level at the receiver is large, the receiver performance is decreased by the effect of the spurious. Thus, the effectiveness of LNA On/Off switching technique is proved as to reduce the effect of the spurious.

• The Journal of Bigdata
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• v.1 no.2
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• pp.1-8
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• 2016

User activity log includes lots of hidden information, however it is not structured and too massive to process data, so there are lots of parts uncovered yet. Especially, it includes time series data. We can reveal lots of parts using it. But we cannot use log data directly to analyze users' behaviors. In order to analyze user activity model, it needs transformation process through extra framework. Due to these things, we need to figure out user activity model analysis framework first and access to data. In this paper, we suggest a novel framework model in order to analyze user activity model effectively. This model includes MapReduce process for analyzing massive data quickly in the distributed environment and data architecture design for analyzing user activity model. Also we explained data model in detail based on real online service log design. Through this process, we describe which analysis model is fit for specific data model. It raises understanding of processing massive log and designing analysis model.

• Journal of the Korean Society of Costume
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• v.54 no.1
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• pp.109-123
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• 2004

In this study, the fashion trend after the 1990s and the characteristics of fashion in the postmodernistic viewpoint that mainly effected fashion were observed, and the characteristics of fashion illustration expression was observed in the viewpoint of its link. It can be seen that mutually close characteristics are mutually linked. As the result of this study, the characteristics of fashion illustration can be categorized into three areas. and the sub-concepts are as following. The first category is the pursuit of feminine beauty of individual multi-dimension. This includes- 1) retro feminine beauty; 2) fetishistic and ecstatic feminine beauty; 3) mixed composition genderless (mixed composition style. ageless style and raceless style): and 4) beauty of body deconstruction and reconstruction (deformation due to partial transformation, change into animalization, mechanization and spirituelization. and beautification of crudeness). The second is the intentional deviation of expression and production technique. This includes-1) deviation from traditional perspective; 2) deviation from composition concept: and 3) breaking away from the existing material and expression technique of material. The third is the pursuit of authority-rejection form of expression. This is an area that should be noticed in the fashion illustration expression of the 1990s, as it shows the most diverse phenomenon. The sub-concepts of this category include- 1) separation of art 2) minimalism (minimalism in structure and production method); 3) flatness; 4) completion of incompletion; 5) accidentalism; 6) sportive;7) absence of figure; 8) intentional childishness 9) story development; 10) techno mechanism and cyber character; and 11) animation style.

• Journal of Educational Research in Mathematics
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• v.14 no.3
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• pp.327-345
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• 2004

This study attempts to discuss holistic information in order to identify the characteristics of interactions using a graphing calculator. The use of a graphing calculator was divided into three stages: Visual, Analytical, and Self-regulated. The last stage can be called the Self-regulated instrument stage, because this last stage, the use of the calculator, is generally characterized as students actively controlling their ongoing efforts through self-regulating. The accomplishments of the operation can be divided into three levels: Immature, Maturing, and finally, Mature level. First, the characteristics of the Leading Statements were investigated to figure out who has the main role in cooperative learning. This study can support the previous study, which showed that computers could help improve the self-esteem of low-level students. Second, the point of transformation is referred to as the Turning Point. Several functions were observed in the Turning Point: student, instrument, and teacher. Third, when the students convert-sations reach a lull in class and then resume due to certain primary factors without the teachers intervention, this is a case of what is referred to as Structuralization. And last, in this study, the graphing calculator can be used as an auxiliary stimulus to help students control their stress and their attitudes, which in turn can also improve students social interaction.

• School Mathematics
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• v.9 no.4
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• pp.487-506
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• 2007

The aims of this study is figure out the characteristics of justification patterns and mathematical representation which are derived from 14 mathematically gifted middle school students in the process of solving the spatial tasks on Archimedean solid. This study shows that mathematically gifted students apply different types of justification such as empirical, or deductive justification and partial or whole justification. It would be necessary to pay attention to the value of informal justification, by comparing the response of student who understood the entire transformation process and provided a reasonable explanation considering all component factors although presenting informal justification and that of student who showed formalization process based on partial analysis. Visual representation plays an valuable role in finding out the Idea of solving the problem and grasping the entire structure of the problem. We found that gifted students tried to create elaborated symbols by consolidating mathematical concepts into symbolic re-presentations and modifying them while gradually developing symbolic representations. This study on justification patterns and mathematical representation of mathematically gifted students dealing with spatial geometry tasks provided an opportunity for understanding their the characteristics of spacial geometrical thinking and expending their thinking.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.10
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• pp.759-767
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• 2006

The level-of-detail (LoD), which is a method of reducing polygons on mesh, is one of the most fundamental techniques in real-time rendering. In this paper, we propose a novel level-of-detail technique applied to the virtual character's motion (Motion LoD). The movement of a virtual character can be defined as the transformation of each joint and it's relation to the mesh. The basic idea of the proposed 'Motion LoD' method is to reduce number of joints in an articulated figure and minimize the error between original and simplified motion. For the motion optimization, we propose an error estimation method and a linear system reconstructed from this error estimation for a fast optimization. The proposed motion simplification method is effectively useful for motion editing and real-time crowd animation.