• The Journal of Korean Society for School & Community Health Education
• /
• v.9 no.1
• /
• pp.85-97
• /
• 2008

Objectives: This study was designed to understand the oral health knowledge & conduct of middle-school students, search for the learning objective and the educational method in line with the subjects and of utilizing as the basic data for an effective oral health-care program. Methods: The samples to achieve the purpose of this research are composed of 139 students in middle-school, OO county. Chungcheongbuk-do, the number of male students 64, and female students 75. Data were statistically analyzed by frequency analysis, $x^2$-test or Fisher's exact test by using SPSS WIN Ver. 12.0. Results: Among items on oral-health knowledge in middle-school students. the awareness ratio on a cause and preventive method for oral disease was surveyed to be lower than the awareness ratio on symptoms of oral disease. As a result of examining by comparing knowledge and behavior on the time of tooth brush. both awareness and behavior were the level of 50% or less than it. In particular, 46.2% perceived after lunch. but practice just accounted for 33.0%. The frequency of tooth brush a day was the largest in a case(47.5%) of doing twice a day. However. there was also the response (5.8%) with saying of brushing once or not brushing even once. Thus, the practice of tooth brush was surveyed to be very low even if being a minority of students. The frequency of taking a light meal was 68.8% in less than twice a day. However, even students of taking more than five times were surveyed to be 9.8%. Out of the whole-body health in over 50%-59.9%. the oral health was surveyed to be perceived to be very important. Compared to the awareness level on importance of a tooth, the ratio of visiting a dentistry was analyzed to be very low. Conclusions: The study results suggest that the school oral-health project was examined to have the necessity of being expanded and carried out even in middle-and-high schools, by which the specific oral-health promotion program including oral-health education in this period is developed.

• Carbon letters
• /
• v.22
• /
• pp.48-59
• /
• 2017

This study synthesized pure anatase carbon doped $TiO_2$ photocatalysts supported on a stainless steel mesh using a sol-gel solution of 8% polyacrylonitrile (PAN)/dimethylformamide (DMF)/$TiCl_4$. The influence of the pyrolysis temperature and holding time on the morphological characteristics, particle sizes and surface area of the prepared catalyst was investigated. The prepared catalysts were characterized by several analytical methods: high resolution scanning electron microscopy (HRSEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). The XRD patterns showed that the supported $TiO_2$ nanocrystals are typically anatase, polycrystalline and body-centered tetragonal in structure. The EDS and XPS results complemented one another and confirmed the presence of carbon species in or on the $TiO_2$ layer, and the XPS data suggested the substitution of titanium in $TiO_2$ by carbon. Instead of using calcination, PAN pyrolysis was used to control the carbon content, and the mesoporosity was tailored by the applied temperature. The supported $TiO_2$ nanocrystals prepared by pyrolysis at 300, 350, and $400^{\circ}C$ for 3 h on a stainless steel mesh were actual supported carbon doped $TiO_2$ nanocrystals. Thus, $PAN/DMF/TiCl_4$ offers a facile, robust sol-gel related route for preparing supported carbon doped $TiO_2$ nanocomposites.

• Proceedings of the Korean Society of Propulsion Engineers Conference
• /
• 2011.11a
• /
• pp.649-652
• /
• 2011

A series of hybrid rocket combustion experiments were carried out with PMMA/GOx changing diameter and length of the disk installed at pre-chamber. The disk can generate vortex shedding flow and change flow conditions prior to entering the fuel grain which could also alter the combustion characteristics and pressure oscillations. Isolated dimple-like surface roughness patterns distributed all over the fuel surface, which can be thought of as a realization of the inherent flow instability. It is very likely that the formation of cell structures is originated from the modification of boundary layer characteristics of an entering oxidizer flow caused by a blowing effect mainly taking place near the wall. This coincided with our LES results. It would be a meaningful basis to understand combustion instability of hybrid rocket motor.

• The Journal of Korean Medicine
• /
• v.41 no.2
• /
• pp.107-121
• /
• 2020

Objectives: The purpose of this study was to identify the characteristics of patients who visited the emergency room (ER) of a Korean medicine (KM) hospital and to provide basic data for further research. Methods: We conducted a retrospective analysis using electronic medical records of 263 patients who visited the ER of OO University Oriental Hospital from January 1 to December 31, 2019. Results: Of the 263 patients' medical records, 245 were included in this analysis. The male-to-female ratio was 1.09:1. The average age was 52 years, with patients in their 40s having the largest distribution. The district where the hospital was located had the largest number of patients. The distribution by visit time was the lowest in the early morning. Most patients visited on Sunday, in September, and on the day of onset. The admission rate was 39.18%, and largest number of patients was admitted to the Department of Acupuncture and Moxibustion. The percentage of patients who revisited the KM hospital as an outpatient were 26.17%. The diagnosis for most patients was musculoskeletal disease. Acupuncture was the most common treatment, accounting for 62.45% of the cases, followed by herbal medicines, accounting for 54.69% of the cases. National health insurance was the most common type of insurance registered. Most patients visited the ER of the KM hospital via the ER of the hospital. Conclusions: This clinical analysis helped us identify the characteristics of patients visiting the ER of a KM hospital. Continuous data accumulation is required in relation to this for further studies.

• Journal of Korean Society of Environmental Engineers
• /
• v.22 no.12
• /
• pp.2107-2113
• /
• 2000

Toxicity estimation of three nonionic surfactants (Brij 30, Tween 80, Triton X-lOO) and their effect on the biodegradation of polycyclic aromatic hydrocarbons (PAHs) in the aqueous phase and soil slurry phase were investigated. Brij 30 was found to be the most biodegradable among the surfactants tested, and showed no substrate inhibition up to a concentration of 1.5 g/L. It was definitely utilized as a carbon source by the microorganisms. Naphthalene and phenanthrene in the aqueous phase were completely degraded by phenanthrene-acclimated cultures within 60 hours, but a substantial amount of naphthalene was lost due to the volatilization. The limiting step in the soil slurry bioremediation was bioavailablity by the microorganisms in the sand slurry and mass transfer from a solid to aqueous phase in the clay slurry. TOC analysis revealed that most of substrates including surfactant in the reactor were degraded. pH transition indicated that phenanthrene was metabolized into intermediates containing acid function.

• Journal of The Korean Society of Clinical Toxicology
• /
• v.9 no.2
• /
• pp.77-80
• /
• 2011

Purpose: The purpose of this study was to investigate the relationship between patients with a neuropsychiatric history and features of their suicide attempt, in order to analyze the risk associated with psychiatrist prescribed drugs Methods: We retrospectively investigated cases of intentional overdose drug ingestion in patients greater than 14 years of age who visited OO emergency medical center between January 1, 2008 and July 31, 2010. We evaluated patient medical records to ascertain their age, sex, neuropsychiatric history, and components of ingested intoxicant. Information regarding any suicide reattempt was obtained after discharge through follow up telephone survey. SPSS version 13.0 was used for statistical analysis. Fisher's exact test was performed with p<0.05 considered statistically significant. Results: Ninety-six of 209 patients (46%) had a past history of psychological problems. Among those 96 patients with a history of psychological problems, 46(48%) used an overdose of the medicine prescribed by their psychologist in order to attempt suicide. However, for patients without a history of psychological problems, intoxication by neuropsychiatric drugs was insignificant. Neuropsychiatric patients required greater follow up care after discharge and exhibited significantly more suicide reattempts. Conclusion: This study revealed that patients sometimes use the medicine prescribed by their psychologist to attempt suicide. Therefore, an exhaustive plan to control the medicines prescribed to psychiatric patients should be established.

• The Journal of Korean Association of Computer Education
• /
• v.17 no.1
• /
• pp.13-23
• /
• 2014

In the process of development the e-learning course at Cyber University, one important factor to be considered for the effective e-learning contents is the User Interface(UI) of the e-Learning content platform. The User Interface is important because the well-designed UI can help students to perform effectively and easily learning activities. Despite the importance of the usability, few attempts have been carried out to design the e-learning contents UI from the usability perspectives. Thus, the purpose of this study is to explore the usability design elements for the e-learning contents UI. For this purpose, a usability evaluation study on the e-learning contents UI of a cyber university at Seoul was conducted. Implications for the improvement of the current e-Learning contents UI was presented.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.1 no.1
• /
• pp.20-26
• /
• 2006

One of the computer application fields which started showing noticeable new growth trends in recent years is the real time communication distributed computing application field. Object -oriented(OO) real time(RT) distributed computing is a form of real-time distributed computing realized with a distributed computer system structured in the form of an object network. In this paper, we describes the application environment as the DHS (distributed high-precision simulation) with TMO structure. The TMO scheme is aimed for enabling a great reduction of the designer's effort in guaranteeing timely service capabilities of distributed computing application systems. It has been formulated from the beginning with the objective of enabling design-time guaranteeing of timely action. In the real time simulation techniques based on TMO object modeling, we have observed several advantages to the TMO structuring scheme. TMO object modeling has a strong traceability between requirement specification and design, cost-effective high-coverage validation, autonomous subsystems, easy maintenance and flexible framework for requirement specification.

• Korean Journal of Social Welfare
• /
• v.59 no.1
• /
• pp.353-379
• /
• 2007

The purpose of this study is to develop and evaluate a school-based alcohol and delinquency prevention program. The program emphasizes the acquisition of skills to effectively deal with peer pressure specific to alcohol use and delinquency as well as to build more healthy relationships with both parents and friends. The program was operated by social workers in a middle school in Seoul for almost 2 months. The program produced positive results. That is, students' drinking frequencies, the level of positive alcohol expectancies, and the level of delinquency have been lowered. Finally, this study suggests that the length of the program be extended and the program be replicated by future social work practitioners and researchers in order to make the program more effective.

• The Journal of Korean Obstetrics and Gynecology
• /
• v.18 no.3
• /
• pp.234-241
• /
• 2005

Purpose : Trigeminal neuralgia has been known a rebellious disease and there has been no case report of trigeminal neuralgia during pregnancy in Oriental medicine. Experienced good effect on treatment for trigeminal neuralgia during pregnancy, we wanted to report a case report of trigeminal neuralgia during pregnancy. Methods : 5-month-pregnancy, patient with trigeminal neuralgia was hosptalized from the 10th, June, 2003 to the 23th, June, 2003 in OO Oriental Medical Center. In acupuncture therapy, SI19(Tinggong, 聽宮), S7(Hagwan, 下關), LI19(Hwaryo, 禾?), S4(Chichang, 地倉), S2(Sabaek, 四白), Tel7(Yepung, ?風), B2(Chanjuk, ?竹), G１4(Yangbaek, 陽白), 太陽(taeyang), 魚腰(yuje) were used. In Moxa Therapy, SI19(Tinggong, 聽宮), S7(Hagwan, 下關), LI19(Hwaryo, 禾?), S4(Chichang, 地倉), S2(Sabaek, 四白), Te17(Yepung, ?風) were used. In Herbal Therapy, Boikyangwytang was used. Pain was measured by VAS(Visual Analogue Scale). Results : At the 10th, June, 2003, Pain was measured VAS(100). At the 23th, June, 2003, Pain was measured VAS(10) and Pain was resolved, Tic(intermediate) was remain. Conclusion : We could get effective result that a case of trigeminal neuralgia during pregnancy, was treated conservative therapy of oriental medicine.