• Journal of Life Science
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• v.18 no.9
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• pp.1312-1315
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• 2008

High throughput-drug screening plays a pivotal role for early stage of drug discovery process. In the course of assay development for screening of cell death-inducing agents, a protocol that is simple, time-saving, and high throughput-compatible was designed which was confirmed that the protocol can be worked by a HTS-compatible machine. In 96-well format, PC-3 cancer cells (1${\times}10^{4}$ cells/ml) were cultured for 24 hr. After 24 h-incubation with various medicinal plants extracts, the cells were then stained with DAPI for 30 min. The fluorescence intensity of the stained cells was measured semi-automatically with a multilabel counter. To test whether the present assay system effectively works, we screened about 850 medicinal plant extracts, and selected 1 positive crude extracts that contained cell death-inducing activity. These results suggest that the protocol is highly amenable to HTS implementation for a cell death-inducing agent(s).

• Journal of the Korean Society for Library and Information Science
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• v.43 no.4
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• pp.101-115
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• 2009

This research was based on Howard Gardner's multiple intelligences theory. The purpose of this study was to describe students' book selection preferences using the theory of multiple intelligences. We have conducted a survey of high schools in the Chung-Nam province, consisting of 100 students, 50 in the high academically achieving group and another 50 in the low achieving group, in an attempt to analyze the relationship between their book selection preferences and the types of students' multiple intelligences. We want to assist in the research data for the reading guide.

• Journal of Sensor Science and Technology
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• v.27 no.6
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• pp.368-373
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• 2018

The effects of long-term exposure of high and low humidity on thin-film humidity sensors are investigated. Five commercially available thin-film humidity sensors are initially calibrated in a humidity chamber as a reference before longterm exposure to high and low humidity. Then, the sensors are kept in a high-humidity environment (~95 %rh) for four months. After the exposure, the sensors are calibrated in the same manner as the initial calibration. Consequently, the device reading values from the humidity sensors are elevated up to about 5 %rh. Interestingly, the degree of elevation by the high-humidity exposure shows a negative correlation with the price of the humidity sensors. Humidity sensors are then kept in a low-humidity environment (~10 %rh) for another four months. After the exposure, a calibration similar to the initial calibration is performed. As a result, the device reading from humidity sensors is decreased, indicating a recovery from the effect of high-humidity exposure. The durability test conducted in this study provides experimental evidence for the use of thin-film humidity sensors in high-humidity environments such as greenhouses and food factories for a long period of time.

• Journal of English Language & Literature
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• v.56 no.6
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• pp.1339-1360
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• 2010

An analogical reading of socio-historical context of Harold Pinter's The Caretaker employs some postcolonial discursive analyses of postimperial British capitalistic interests in their post war reconstruction. It is also concerned with causes of so-called broken society. The Caretaker dramatizes minimal actions: a tramp is invited by the elder brother; a job as caretaker is offered; he is reluctant to accept the first offer by the elder brother, but is willing to the second by the younger; eventually, he is excluded because he makes noises while dreaming. These trivial actions produce serious and critical speech acts with their socio-historical implications. The tramp Davies is socially and thereby existentially excluded from the centre of the cold, banished to even colder peripheries. The audience face to the question. Why is Davies excluded? This study tries to answer the question, uncovering deep-rooted capitalistic racism, and reading its symptoms. Even after 50 years The Caretaker was staged, post-imperial broken society tries to operate the betrayals of disparity between the cause and effect of what has gone wrong. Pinter confirms that the action of the play takes place in a house in west London. With the city of London as its capitalistic centre, British imperialism lavished much of its wealth which has only served sectional interests dividing people against themselves. Pinter dramatizes the root of broken society. On the one hand, Pinter foregrounds the very general conflicts between individuals and forms of power; on the other hand, he underlies the very specific strategies of socio-historical exploitation, domination and exclusion.

• Advances in materials Research
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• v.13 no.2
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• pp.129-140
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• 2024

This study evaluates the ratio of Toluene di-isocyanate (TDI) functional group isocyanate (NCO) to the binder functional hydroxyl group (OH) in HTPB/AP/Al-based propellants on their mechanical properties, flow rate, and viscosity to determine the limitations of NCO/OH in the composition of solid propellants. The propellants consisted of hydroxyl-terminated polybutadiene (HTPB) polyurethane (PU), aluminum (Al) and tri-modal ammonium perchlorate (AP). The tri-modal AP consisted of 30% of coarse AP, 30% of medium AP, and 8% of fine AP. The ratio of NCO/OH varies from 0.73 to 0.85, with two binder percentages of 10.5% and 12%. An increase in NCO/OH ratio with 10.5% binder provided 20%, 95%, and 8 to 9% increments in UTS, modulus, and hardness, respectively. However, the propellant elongation, density, and flow rate decreased by 170%, 0.2%, and 11-12%, respectively. Viscosity increased 20% based on initial hour reading. The 12% binder provides 27%, 47%, and 5~6% an increment of UTS, modulus and hardness respectively. However, the propellant elongation, density, and flow rate decreased by 47%, 0.17% and 27%, respectively. The viscosity increased 30% based on initial hour reading. This study suggests the NCO/OH value of 0.77 and 10.5~11% binder content in propellant based on the mechanical properties, flow rate, and viscosity for better processing and pot life.

• Korean Journal of Cognitive Science
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• v.35 no.2
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• pp.129-159
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• 2024

In the process of reading, readers can process information not only within the fixated region, known as the fovea, but also in the parafoveal region to the right of the fovea. While the parafoveal semantic preview effect has been confirmed in eye-tracking experiments using boundary techniques, research on how the parafoveal preview effects differ depending on the degree of semantic relatedness is still limited. This study investigates the parafoveal preview effects as a function of semantic relatedness with the target word. The experiment utilized Korean-Chinese bilinguals and presented mixed-language sentences as experimental stimuli. Four parafoveal preview conditions were applied to the target words in each sentence: (1) Korean identical condition, where the parafoveal word was the same as the target word (e.g., "나라," meaning "country" in English), (2) Chinese synonymous condition, where the parafoveal word had the same meaning as the target word (e.g., "国家," also meaning "country" in English), (3) Chinese semantically related condition, where the parafoveal word was semantically related to the target word (e.g., "政权," meaning "political power" in English), and (4) Chinese unrelated condition, where the parafoveal word was semantically unrelated to the target word (e.g., "围裙," meaning "apron" in English). The study explored the parafoveal preview effect in terms of the degree of semantic association with the target word. We found the most pronounced preview effect in conditions where the preview and the target word shared the same meaning, and we also observed preview effects in conditions where the semantic relatedness with the target word was relatively weak. This study suggests that the degree of semantic relatedness between the parafoveal preview word and the target word can influence readers' reading processes. It contributes to a better understanding of readers' eye movements and comprehension processes, with potential implications for the development of effective reading strategies and educational methods.

• Journal of the Korean Home Economics Association
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• v.44 no.1 s.215
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• pp.37-45
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• 2006

The study aimed to determine the effects of Early Childhood STEP on parenting stress and child's behavior. The study subjects were 29 Korean mothers and their child. The researcher translated the Parent's guide of the Early Childhood STEP into Korean, along with the video tapes for parents. The experimental group was educated with the Early Childhood STEP program (lecture, reading educational material, discussion, watching video). To determine the pre- and post-test differences of parenting stress and infant behavior, t-test was used. The results are presented below. First, Early Childhood STEP exhibited a decreasing effect on the parenting stress of mothers. Second, STEP exhibited a decreasing effect on the infant behavior, particularly the behaviors in the areas of incapability, revenge, and power reactions.

• The Journal of the Convergence on Culture Technology
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• v.5 no.4
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• pp.183-189
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• 2019

The purpose of this study is to investigate the effects of mobile phone use on university students' English reading achievement and consider the value and effectiveness of mobile phones as a learning tool. The study's subjects were students from a university in Seoul, who were divided into an experimental group (n=37) and a control group (n=43). The experimental group used various mobile phone functions-such as searching, recording, taking photos, using mobile apps, and community uploads-in reading class. The control group, on the other hand, focused on students' presentations and the professor's explanations. Two achievement tests and an open-ended questionnaire were administered. The results revealed that the experimental group scored higher than the control group, which showed a significant difference. In addition, the positive impacts of mobile phone use as reported in the questionnaire were interest and motivation, self-directed learning, and continuous learning beyond time and space. In order to foster efficient second language teaching and learning, learners and also teachers must be aware of the potential value of mobile phones as a learning tool. To encourage more active mobile phone use in the classroom, diverse and interesting class activities using mobile phones should be developed.

• Polymer(Korea)
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• v.29 no.6
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• pp.536-542
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• 2005

The effect of lime-related parameters such as loading velocity, load application time, gauge reading time on Rockwell hardness measurement was investigated for PE, PP PVC, and PMMA. It was found that keeping the specific requirements in the same condition is very important to obtain reliable and repeatable darn in polymer hardness measurement. The optimum condition for hardness measurement was 4 sec for load application time,15 sec for test load application net time, and 15 sec for gauge reading time after unloading. Using thess conditions, round robin test was carried out for 6 laboratories and it was shown that the testing machine should be one in which time-related variables are controllable. Indirect verification of hardness tester using brass reference block was not enough to guarantee the test results for polymer.

• Imaging Science in Dentistry
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• v.41 no.1
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• pp.11-16
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• 2011

Purpose : The aim of this study was to evaluate the effect of liquid crystal display (LCD) monitor type and observer experience on the diagnostic performance in soft-copy interpretations of maxillary sinus inflammatory lesions on panoramic radiographs. Materials and Methods : Ninety maxillary sinuses on panoramic images were grouped into negative and positive groups according to the presence of inflammatory lesions, using CT for confirmation. Monochrome and color LCDs were used. Six observers participated and ROC analysis was performed to evaluate the diagnostic performance. The reading time, fatigue score, and inter-/intra-observer agreements were assessed. Results : The interpretation of maxillary sinus inflammatory lesions was affected by the LCD monitor type used and by the experience of the observer. The reading time was not significantly different, however the fatigue score was significantly different between two LCD monitors. Inter-observer agreement was relatively good in experienced observers, while the intra-observer agreement for all observers was good with monochrome LCD but not with color LCD. Conclusion : The less experienced observers showed lowered diagnostic ability with a general color LCD.