• Journal of Mechanical Science and Technology
• /
• v.18 no.12
• /
• pp.2294-2302
• /
• 2004

The objective of this study is to obtain detailed information for the micro fabrication of lead frames by applying spray technology to wet etching process. Wet etching experiments were performed with different etching parameters such as injection pressure, distance from nozzle tip to etched substrate, nozzle pitch and etchant temperature. The characteristics of single and twin spray were measured to investigate the correlation between the spray characteristics and the etching characteristics. Drop size and velocity were measured by Phase-Doppler Anemometer (PDA). Four liquids of different viscosity were used to reveal the effects of viscosity on the spray characteristics. The results indicated that the shorter the distance from nozzle tip and the nozzle pitch, the larger etching factor became. The average etching factor had good positive correlation with average axial velocity and impact force. It was found that the etching characteristics depended strongly on the spray characteristics.

• Journal of the Korean Society of School Health
• /
• v.14 no.2
• /
• pp.161-175
• /
• 2001

In order to evaluate the erects of regular health education by a school nurse on a child's health-related knowledge and health-related behavior, a questionnaire survey was conducted with primary school students (4th, 5th, 6th grade) from December 5 to December 15, 1998. Subjects of the study were composed of two groups; one group who had regular health education by a school nurse and the other group who had no regular health education by a school nurse. The results obtained from the data analysis were as follows: 1. There was no significant difference in general characteristics between broth groups, but significant difference in parent-related characteristics and health-related characteristics were detected. 2. The health-related knowledge score was 21.98 in the regular health education group and 21.04 in the control group. There was significant differences between both groups (p<0.05). 3. Significant differences in the practice of health-related behaviors were detected between both groups (p<0.05). 4. The variables associated with the practice of health-related behaviors were regular health education, health-related knowledge, the education level of the mother, ignorance of health and parent's concern about the child's health (p<0.05). 5. The practice of regular health education was significantly related to the prevention of communicable disease, concern about health and total health behavior (p<0.05). From the above results, it can be concluded that there is a positive relationship between regular health education and the practice of health-related behavior after controlling other variables. According to the results, suggestions are as follows; 1. Evaluation of health-related knowledge and behaviors be conducted by the school nurse on pre and post-education. 2. The primary school student can be educated about health by the school nurse.

• Asian Journal of Business Environment
• /
• v.6 no.4
• /
• pp.27-34
• /
• 2016

Purpose - The study sought to examine the relationship between individual characteristics and system features and Human Resource Information System (HRIS) success in Japanese manufacturing companies in Malaysia. Research Design, Data, and Methodology - This study adopt quantitative approach to investigate the relationship between individual characteristics and system features and HRIS. Toward this objective, a total of 700 questionnaires were mailed to a representative of the organization. A total of 187 questionnaires were returned, and only 145 were usable for further analysis, representing a response rate of 20.71%. Result - Results indicated that individual characteristics and two dimensions of system characteristics (ease of use and training) were significantly related to HRIS success. Unexpectedly, the results showed that the third dimension of system features (documentation) was unrelated to HRIS success. Conclusions - The results partially support the underlying arguments that individual characteristics and system characteristics have significant influences on HRIS success. The finding suggests that HRIS success in the organization can be generated as a result of good implementation of system support and employees' readiness to apply HRIS in their jobs.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.22 no.2
• /
• pp.108-114
• /
• 2018

In this study, the thermal and rheological characteristics of a 10 wt.% addition of aluminum particles and the effect of the particle size were investigated to qualitatively analyze the paraffin fuel entrainment regression rate. The results revealed that the addition of aluminum particles and their relative particle size affected the rheological characteristics, rather than the thermal characteristics. Moreover, it was found that the variation of thermal properties had a minor effect on the entrainment regression rate, in comparison to the variation in rheological properties.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2021.11a
• /
• pp.238-239
• /
• 2021

This study presented the development of a user centered school facility fire safety evaluation model that would support fire safety evaluation, which is globally recognized as being important in terms of school safety, to be more efficiently implemented in the school field mainly by students. The study consisted of five steps. First, actual condition survey tools were developed based on the major fire safety evaluation items derived through literature review. Second, the characteristics of domestic school facilities in terms of fire safety were developed using the survey tools. Third, an evaluation model at a level utilizable by students was developed based on the foregoing characteristics. Fourth, the applicability of the model was verified through a trial application of the model to elementary school students. Finally, legal and institutional improvement plans and fire safety education materials were presented through a policy proposal.

• Journal of Computing Science and Engineering
• /
• v.11 no.2
• /
• pp.39-48
• /
• 2017

Main content extraction of web pages is widely used in search engines, web content aggregation and mobile Internet browsing. However, a mass of irrelevant information such as advertisement, irrelevant navigation and trash information is included in web pages. Such irrelevant information reduces the efficiency of web content processing in content-based applications. The purpose of this paper is to propose an automatic main content extraction method of web pages. In this method, we use two indicators to describe characteristics of web pages: text density and hyperlink density. According to continuous distribution of similar content on a page, we use an estimation algorithm to judge if a node is a content node or a noisy node based on characteristics of the node and neighboring nodes. This algorithm enables us to filter advertisement nodes and irrelevant navigation. Experimental results on 10 news websites revealed that our algorithm could achieve a 96.34% average acceptable rate.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2005.07b
• /
• pp.1284-1287
• /
• 2005

Peripheral pentacene region gives a significant influence on C-V characteristics of metal-oxide-pentacene capacitor structure. When the gate voltage goes toward negative, the effect of peripheral pentacene region becomes larger. Remaining gate DC bias constant and changing small signal frequency, the capacitance of peripheral pentacene changes along with frequency so that the total capacitance value also changes. The influence of peripheral pentacene region should be removed to measure accurate C-V characteristics, because it is hard to take into account the effect of the region quantitatively. After removing the influence of peripheral pentacene region, acceptor concentration, flat band voltage and depletion width of pentacene thin film are extracted from an accurate C-V curve as $1.58{\times}10^{17}cm^{-3}$, -1.54 V and 39.4 nm, respectively.

• Journal of Preventive Medicine and Public Health
• /
• v.3 no.1
• /
• pp.23-29
• /
• 1970

The authors compared the basic characteristics of rural woman in relation to family planning for June 1967 and June 1969 in Kyung San County, Kyungpook Province, Korea. The statistics showed that these characteristics are gradually changing. The marriage age was slightly higher than the past year and the formal education of women increased. The ideal children number, and the gravidity and mortality rates decresed. At the same time the number of induced abortions, the knowledge of family planning, and the acceptance rate of contraception increased. These phenomena seem to follow the present worldwide trend.

• Proceedings of the KIEE Conference
• /
• 1996.07c
• /
• pp.1857-1860
• /
• 1996

In this paper, ozonizer of neon discharge tube type( Neolamp ) by using silent discharge has been designed and manufactured. The discharge and ozone generation characteristics of Neolamp have been studied with variation of turn-on number( N ) of Neolamp, quality( Q ) and shape of external electrode. The discharge voltage is proportional to gap spacing of spiral external electrode( G ) for constant applied volatge. The discharge current is inversely proportional to G for constant applied volatge. The ozone concentration is inversely proportional to Q and G. Also, ozone concentration and generation are proportional to N. The sterilization characteristics of Escherichia coil have been obtained more than 97[%] at $1.30[mg/{\ell}]$ of liquid ozone concentration.

• Proceedings of the KIEE Conference
• /
• 1997.07e
• /
• pp.1724-1726
• /
• 1997

In this paper, a superposed discharge type ozonizer(CISDO) has been designed and manufactured. CISDO is equipped with three electrodes(central electrode, internal electrode and external electrode), and it is composed of two gaps. Ozone is generated by overlapping silent discharge, which is respectively came from two gaps. This paper describes the following two characteristics : (1) The characteristics of discharge with variation of output voltage of AC H.V source, quality of supplied gas and discharge voltage (2) The characteristics of ozone generation with variation of quality of supplied gas. discharge power, operating number.