• Journal of Preventive Medicine and Public Health
• /
• v.29 no.3 s.54
• /
• pp.539-553
• /
• 1996

The study was conducted from May to September in 1994 to investigate applicability of the Hearing Handicap Inventory for the Elderly-Screening version(HHIE-S) in parallel with the pure-tone audiometer to the initial screening test of noise-induced hearing loss(NIHL) in some noise-exposed workers. Subjects were selected by systemic sampling that took every 10th person from 6, 700 workers taking the annual occupational health examination by the department of Health Maintenance of Dongsan Hospital Keimyung University in Taegu. The authors administered the pure-tone audiometric test and self-reported questionnaire of HHIE-S including items of sociodemographic and job-related variables concurrently. The final subjects analysed were 1,019(488 males and 531 females) excluding fourteen persons who had many missing values in their questionnaires. The reliability coefficients of HHIE-S scale by Cronbach's alpha were 0.84. In the univariate analysis of hearing handicap measured by the HHIE-S, work duration, military service and the hearing threshold loss at 1KHz and 4KHz by the initial audiometer were significant in males while age, work duration and hearing threshold loss at 1KHz and 4KHz were significant in females. In the stepwise linear regression analysis, hearing threshold loss at 1KHz and 4KHz, was the only selected variable explaining the hearing handicap in males and hearing threshold loss at 1KHz and 4KHz, age, and work duration were selected in females. In ROC curves for HHIE-S scores against NIHL as gold standard which was defined by the follow-up audiogram as more than 30dB of the average of 0.5/1/2KHz and 50dB at 4KHz, the optimal cutoff for the parallel HHIE-S appeared to be 8. The results suggest that HHIE-S appeared to have some reliability and validity in this data and might be used in screening NIHL in parallel with pure-tone audiometer in noise-exposed workers.

• Research in Plant Disease
• /
• v.21 no.3
• /
• pp.201-207
• /
• 2015

This study was conducted to establish a simple mass-screening method for resistant melon to Fusarium wilt caused by Fusarium oxysporum f. sp. melonis (FOM). Root-dipping inoculation method has been used to investigate resistance of melon plants to Fusarium wilt. However, the inoculation method requires a lot of labor and time because of complicate procedure. To develop a simple screening method on melon Fusarium wilt, occurrence of Fusarium wilt on susceptible and resistant cultivars of melon according to inoculation method including root-dipping, soil-drenching, tip, and scalpel methods was investigated. Scalpel and tip methods showed more clear resistant and susceptible responses in the melon cultivars than root-dipping inoculation method, but tip method represented slightly variable disease severity. In contrast, in the case of soil-drenching inoculation method, disease severity of the susceptible cultivars was very low. Thus we selected scalpel method as inoculation method of a simple screening method for melon Fusarium wilt. By using the scalpel inoculation method, resistance degrees of the cultivars according to incubation temperature after inoculation (25 and $30^{\circ}C$) and inoculum concentration ($1{\times}10^6$ and $1{\times}10^7conidia/ml$) were measured. The resistance or susceptibility of the cultivars was hardly affected by all the tested conditions. To look into the effectiveness of scalpel inoculation methods, resistance of 22 commercial melon cultivars to FOM was compare with root-dipping inoculation method. When the melon cultivars were inoculated by scalpel method, resistance responses of all the tested cultivars were clearly distinguished as by root-dipping method. Taken together, we suggest that an efficient simple mass-screening method for resistant melon plant to Fusarium wilt is to sow the seeds of melon in a pot (70 ml of soil) and to grow the seedlings in a greenhouse ($25{\pm}5^{\circ}C$) for 7 days, to cut the root of seedlings with a scalpel and then pour a 10 ml-aliquot of the spore suspension of $1{\times}10^6conidia/ml$ on soil. The infected plants were cultivated in a growth room at 25 to $30^{\circ}C$ for about 3 weeks with 12-hr light a day.

• Journal of agricultural medicine and community health
• /
• v.18 no.1
• /
• pp.43-54
• /
• 1993

In order to find the factors associated with the death of hypertensives, 12 year follow-up study for 267 hypertensives whose average blood pressure were 140/90 mmHg or above during their first health screening in 1979-1980 at YongJin Township, Wanju Country, North Cholla Province by the Community Health Team of Chonju Presbyterian Medical Center. The study results are as follows : 1. Initial general characteristics of hypertensives were studied. The age distribution of studied hypertensives showed 27.3% in 40-49 years, 25.8% in 50-59 years, 29.6% in 60-69 years and 17.2% In 70 + years old group. Marital status showed that 82.8% of hypertensives had their wife or husband. 74. 5% were employed on agriculture. 56.5% of hypertensives were illiterate. 2. Among the hypertensives, 91.6% of male and 22.8% of female reported that they were smokers. 82.6% of hypertensives had body mass index lower than 25 Kg/$m^2$. 46.8% of average systolic blood pressure were 160mmHg or above and 54.3% of average diastolic blood pressure were 95mmHg or above. 3. Twenty percent of hypertensives reported that they were treating hypertension at the beginning of follow up, while 68.5% reported that they were not treated. 28.1% reported that they were treating hypertension within 6 months before last follow-up. but 69.3% reported that they were not treated for hypertension within Ii months before last follow up. So 50.6% were classified as never treated group and 41.2% as treated group. 4. Average blood pressure for initial 3 years were calculated. The change of average systolic blood pressure was observed as $161.3{\pm}19.4mmHg$ at the first year, $145.6{\pm}28.0mmHg$ at the second year and $141.4{\pm}37.2mmHg$ at the third year. Average diastolic blood pressure were changed from $96.2{\pm}14.4mmHg$ at the first year to $90.6{\pm}18.6mmHg$ at the second year and $86.4{\pm}22.9mmHg$ at the third year. 5. By the follow-up of hypertensives, 54 hypertensives (46.2%) among 117 male hypertensives and 50 hypertensives (33.3%) among 150 female hypertensives died for 12 years. 42.6% of male death and 52.0% of female death were caused by cerebrovascular diseases. 6. Through univariate statistical test about the association between general characteristics or cardiovascular risk factors of hypertensives and mortality for 12 years, age variable among male and among female age, marital status, occupation. educational level. systolic blood pressure and treatment status were shown as significant variable to influence upon the mortality. 7. By multiple logistic regression analysis, among male age and systolic blood pressure were selected as significant variable to be associated with the total mortality for 12 years. Among female age, systolic blood pressure and treatment status were selected as statistically significant variable to be associated with the total mortality for 12 years.

• Journal of Gifted/Talented Education
• /
• v.25 no.2
• /
• pp.237-259
• /
• 2015

Teachers in music(including Korean traditional music) gifted education are a significant variable in both identifying the giftedness of students and a successful instruction. The purpose of this study is to develop the Scale for Screening the Qualified Teachers for the Gifted in Korean traditional and western Music(SSQTGM), and to examine the validity and reliability of the SSQTGM. To achieve this purpose, this study administered the SSQTGM to 175 teachers of gifted students aged between 13 and 15 in middle schools for the arts. To validate the SSQTGM, I analyzed the criteria of the SSQTGM, and conducted an exploratory and confirmative factor analysis. I also examined an internal consistency. As a result of the exploratory factor analysis, I finally collected 41 items of the SSQTGM. Futhermore, I could identify psychological constructs of the qualified teachers for the gifted in Korean traditional and western music. In consequence of the confirmative factor analysis, the model provided a good fit to observe data. As a result of the reliability analysis, the internal consistency of knowledge in the music(korean traditional music) verified cronbach's ${\alpha}=.937$, and the expertise of the class management and instruction verified cronbach's ${\alpha}=.942$. Also, the teachers' aptitude and personality verified cronbach's ${\alpha}=.963$. This result of the construct validation reflects the fact that the SSQTGM is an available scale that can be applied in gifted education field instantly.

• Applied Chemistry for Engineering
• /
• v.31 no.4
• /
• pp.377-382
• /
• 2020

A sequential design of experiments was employed to optimize MOF-235 synthesis for acetylene adsorption process. Two experimental designs were applied: a two-level factorial design for screening and a central composite design, one of response surface methodologies (RSM). In this study, 2³ factorial design of experiment was used to evaluate the effect of parameters of synthesis temperature and time, and also mixing speed on crystallinity of MOF-235. Experiments were conducted 16 times follwing MINITAB 19 design software for MOF-235 synthesis. Half-normal, pareto, residual, main and interaction effects were drawn based on the XRD results. The analysis of variance (ANOVA) of test results depicts that the synthesis temperature and time have significant effects on the crystallinity of MOF-235 (response variable). After screening, a central composite design was performed to optimize the acetylene adsorption capacity of MOF-235 based on synthesis conditions. From nine runs designed by MINITAB 19, the result was calculated using the second order model equation. It was estimated that the maximum adsorption capacity (18.7 mmol/g) was observed for MOF-235 synthesized at optimum conditions of 86.3 ℃ and 28.7 h.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.30 no.4
• /
• pp.728-737
• /
• 2003

To evaluate microbial data and salivary measurements from clinically compatible, culture-based screening procedures employed with children younger than 36 months old. Plaque and stimulated saliva specimens were collected from 87 children. The pH of each saliva sample was measured before and after 0.94% lactic acid was added. Specimens were diluted and plated on selective media and non-selective media. Data collected were counts of mutans streptococci (MS) and lactobacilli (LB). In addition, total viable counts (TVC) of specimens, salivary pH and buffering capacity were also assessed. Each variable was compared to caries status of subjects. According to this study, the results were as followed: 1. Highly significant correlation with caries rates were found for counts of MS and LB. 2. The specific counts/ml saliva or plaque above which caries is predicted, or below which caries is not predicted were as follows: 1) Saliva MS; $10^5$ 2) Plaque MS; $2{\times}10^5$ 3) Saliva LB; $10^3$ 4) Plaque LB; $10^3$. 3. Salivary pH and buffering capacity versus caries status were not significant. 4. Microbial screening methods based on mutans streptococci had higher predictive values and odds ratios than methods for lactobacilli. 5. MS counts were clearly the best indicators of caries status in young children. This measurement can easily be obtained in a dental clinical setting both by conventional culture techniques, or commercial kits for MS recovery.

• KIPS Transactions on Computer and Communication Systems
• /
• v.12 no.2
• /
• pp.85-92
• /
• 2023

Respiratory infections such as COVID-19 mainly occur within enclosed spaces. The presence or absence of abnormal symptoms of respiratory infectious diseases is judged through initial symptoms such as fever, cough, sneezing and difficulty breathing, and constant monitoring of these early symptoms is required. In this paper, image matching correction was performed for the RGB camera module and the thermal imaging camera module, and the temperature of the thermal imaging camera module for the measurement environment was calibrated using a blackbody. To detection the target recommended by the standard, a deep learning-based object recognition algorithm and the inner canthus recognition model were developed, and the model accuracy was derived by applying a dataset of 100 experimenters. Also, the error according to the measured distance was corrected through the object distance measurement using the Lidar module and the linear regression correction module. To measure the performance of the proposed model, an experimental environment consisting of a motor stage, an infrared thermography temperature screening system and a blackbody was established, and the error accuracy within 0.28℃ was shown as a result of temperature measurement according to a variable distance between 1m and 3.5 m.

• The korean journal of orthodontics
• /
• v.27 no.6 s.65
• /
• pp.865-870
• /
• 1997

The submental region in patients with Obstructive Sleep Apnea (OSA) is Perceived to be larger than normal. Therefore, neck thickness has become a variable routinely measured during clinical screening of OSA subjects. In general, OSA Patients are believed to have a large tongue and a narrow airway. To test if OSA patients have a larger face and tongue than non-apneics, eighty pairs of upright and supine cephalograms were obtained from four groups of subjects subclassified in accordance with severity. The sum of distances between pairs of landmarks was calculated for each subjects and employed as a pure size variable for the face and tongue. Only tongue size becomes larger in accordance with apnea severity in both body positions (P<.01). Tongue size reflects apnea severity, yet it Provides only a small fraction of the explanation with regard to apnea severity. We conclude that size may be one factor of many which are significantly related to OSA severity.

• Journal of Biomedical Engineering Research
• /
• v.29 no.2
• /
• pp.151-158
• /
• 2008

To evaluate aortic wall stiffness without influence of different background blood pressure, a new technique was developed and verified. At eight swine descending aortae, volume-pressure measurement was performed using custom-made system. Based on averaged pressure-volume curve, aortic distensibility index was formulated to evaluate aortic wall stiffness regardless of variable blood pressure and aortic size. The variability of aortic distensibility index by pressure change was compared with other parameters for wall stiffness evaluation. Subsequently, the aortic distensibility index was calculated at 100 contrast-enhanced EBCT data sets of normal volunteers in regular health screening program. The measured aortic distensibility index was compared with age, coronary calcium score, and aortic calcium score. Between 50 and 360 mmHg of blood pressure, the coefficient of variance of aortic distensibility index was 22.00% as comparing with 88.99% of classical compliance. Based on age, aortic distensibility index showed correlation coefficient of 0.55, whereas classical compliance showed 0.26. The correlation coefficient with modified aortic calcification was 0.43. Linear regression study revealed statistical significance of correlation coefficients. The aortic distensibility index, the method to evaluate aortic wall stiffness free from variable blood pressure and aortic size, was developed and verified with significant practical feasibility.

• Journal of the Korean Data and Information Science Society
• /
• v.22 no.5
• /
• pp.877-884
• /
• 2011

The decision tree is a representative algorithm of data mining and used in many domains such as retail target marketing, fraud detection, data reduction, variable screening, category merging, etc. This method is most useful in classification problems, and to make predictions for a target group after dividing it into several small groups. When we create a model of decision tree with a large number of input variables, we suffer difficulties in exploration and analysis of the model because of complex trees. And we can often find some association exist between input variables by external variables despite of no intrinsic association. In this paper, we study on the removal method of unnecessary input variables using multiple external association rules. And then we apply the removal method to actual data for its efficiencies.