• Journal of Digital Convergence
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• v.14 no.11
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• pp.27-35
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• 2016

The study was conducted to identify related risk factor of elderly's suicidal ideation. This study used a cross-sectional design with secondary analysis of the $6^{th}$ 2013 Korea National Health and Nutrition Examination Survey (KNHANES). Data for 1,201 elderlies who aged over 65 years old from the KNHANES were included. Suicidal ideation, general characteristics, physical health, psychological health, EuroQoL, and health behavior were measured. Chi-square test, t-test, and multiple logistic regression were used to analyze this data through the SPSS win 22.0 program. In the results, 7.7% of the elderly had suicidal ideation. The odds ratios of suicidal ideation were significantly higher among those with restriction of activity (OR=1.31, CI=1.40~3.82), those with depression (OR=4.44, CI=1.66~7.40), and those with high levels of stress (OR=9.24, CI=3.48~24.5). Therefore, the activity level, depression level, and stress level need to be regularly assessed in order to prevent suicidal ideation among the elderly.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• v.1 no.1
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• pp.22-30
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• 2020

Many areas of vegetation in the British uplands have reduced species diversity as a result of sheep overgrazing. It has been suggested that abandonment or re-wilding strategies might be used to reverse this. A likely first step would be the removal or reduction of grazing livestock from upland areas, with a presumption that this would lead to a recovery in species richness. However, we do not know if this would work, or the timescales involved. One of the important areas where more knowledge is needed is information on the size and composition of soil seedbanks as regeneration from zseed is a likely pathway of recovery. Here, we compared seedbanks in both grazed and ungrazed plots in five experiments at Moor House NNR in the northern Pennines; these sheep grazing exclusion experiments were started 52 and 63/64 years ago. Soil samples (n=10) were collected from both grazed and ungrazed plots in each experiment, and seed emergence counted in glasshouse trials. We detected only seeds of common species and very few dicotyledonous species. This suggests that the soil seedbank is unlikely to be a reliable source of the less common species for ecological restoration in these upland communities, suggesting an extinction debt. Therefore, seed addition and the creation of suitable safe-sites for germination may be needed in conjunction with grazing controls to allow the establishment of plants that will increase the species richness of the vegetation. However, this interventionist restoration approach remains to be tested.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.2
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• pp.137-142
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• 2007

This study was carried out to observe the antioxidant and angiotensin converting enzyme (ACE) inhibitory activity of susijang (Korean traditional fermented soy food). The antioxidant activity of susijang was measured by using TEAC (trolox equivalent antioxidant capacity) assay. In addition contents of isoflavones, phenolic acids and amino acids were determined. TEAC values of chungkukjang and susijang were significantly higher than those of yellow soybean (p<0.05). The contents of isoflavones (genistein, daidzein) were found to be significantly higher in chungkukjang and susijang than yellow soybean. The susijang showed high content of free amino acids and phenolic acids. ACE inhibitory activity of susijang was significantly higher than those of chungkukjang and yellow soybean, particularly of 70% ethanol extract.

• Journal of the Korea Safety Management & Science
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• v.12 no.2
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• pp.183-192
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• 2010

Korean logistics industry have been focused on transportation business. However, with the expansion of the electronic commerce and on-line shopping, delivery service is now dramatically growing. Despite the expansion of logistics market, the domestic logistics industry have significant structural problems such as low productivity comparing with the advanced countries, relatively high cost and shortage of human resources and lack of professionalism of people in the industry. Logistics companies reallocate employees, use subcontractors, expand consignment and training the employees to overcome the labor shortages but it has some limits. In recognition of the importance of labor in the logistics industry, financial support and investment have increased. Logistics companies tend to hire consultants, set up logistics department or R&D center in order to establish highly productive logistics process and system so it is viewed that there will be considerable demands of human resources in the logistics industry. This study indicates implications and development direction of human resources in the logistics industry by looking into prospect and characteristic of the industry, employment status, training programs and qualification requirements.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.11
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• pp.1323-1330
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• 2014

As for civil service support, the interaction between citizens as well as the government and citizens has an important value, and the participation between citizens be very important. The interaction between these citizens can lead to spreading the use of the app by getting them to share their status information with an specified number of people in the public service such as a social network service. Mobile-based social network service has various built-in sensors to increase the interaction between the government and citizens and post the status information of users on SNS. In this regard, this paper proposed a social network application for civil services based on the Android by using location-based context information. Experimental results showed that since the application proposed in this paper can be applied to low-performance system and exhibits high performance, it can allow users located at a short distance to detect new information and share contents by adding the content to SNS which is the closest to the location of users.

• Human Ecology Research
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• v.53 no.6
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• pp.605-617
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• 2015

This study verifies the effectiveness of developing and implementing a leadership educational program specifically customized to improve of leadership competencies among members of multicultural family support centers and healthy family support centers. This program refers to Triangle Leadership that consists of three categories: finding individual strengths and self-esteem to enhance self-leadership, constructing a vision and roadmap to develop transformational leadership, and stress and teamwork management for competent servant leadership. In order to improve its completeness, focus group interview was adopted for 10 employees in the center and supervised by two professionals. The program was also conducted twice for 142 members of multicultural family support centers and healthy family support centers across the Korea. The result of implementation (with regard to the satisfaction level for the contents of the program) showed that both first and second rounds had improvement in all three categories compared to what was expected before taking the education program. The level of satisfaction for instructor and program operation was more enhanced (as well for the second time) compared to the first round. The evidence of program effectiveness indicates that there is a high anticipation for another approach that suits for the circumstances and requirement of centers and facilitator training.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.852-855
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• 2010

Based on the rapid development of the computer network technology, the ubiquitous sensor network (USN) was developed to enable us to have access to the communication environment anywhere and anytime without the need for recognizing computers or networks. Moreover, with the increasingly high interest on individual health, the USN technology is being applied to diverse sectors for healthcare and disease prevention. In this paper, a system was designed and implemented using the USN-based RF communication for doctors and nurses who care patients in the hospital to easily measure and control the physiological data on blood pressure and blood sugar. In addition, a database was designed using MS SQL database to store and manage the blood pressure and blood sugar data, which were passively or actively measured from patients. Using the results of this study, the physiological data of patients can be managed in real time and emergency situation can be instantly addressed. It is expected that the healthcare service can be improved and the paradigm of healthcare service environment can be changed.

• FLOWER RESEARCH JOURNAL
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• v.16 no.1
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• pp.71-75
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• 2008

The object of this study was to determine the optimum concentrations of boron and IBA and dipping time, and to investigate the effect of combined-treatment of boron and IBA for the improvement of rooting of semi-hardwood cutting of Styrax japonica. The rooting percentage and the number of roots of cuttings increased with short dipping treatment of $7,000mg{\cdot}L^{-1}$ IBA and combined treatment of $100mg{\cdot}L^{-1}$ IBA and $20mg{\cdot}L^{-1}$ boron or $100mg{\cdot}L^{-1}$ IBA and $60mg{\cdot}L^{-1}$ boron. The rooting percentage, no. of roots and fresh weight were higher in combined treatment of boron and IBA than treatment of IBA alone. Either $100mg{\cdot}L^{-1}$ or $200mg{\cdot}L^{-1}$ was regarded as in appropriate level of IBA and the optimal dipping time was three hour in single treatment of IBA. It is concluded that the combined treatment of low concentrations of IBA and boron could be substituted for the treatment of high concentration IBA.

• Journal of Advanced Navigation Technology
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• v.23 no.1
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• pp.90-96
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• 2019

LPWA is a cost-effective and time-saving technology with wide coverage. However, the LPWA is an ISM band that uses UHF radio waves, and its performance is very poor indoors because of its strong linearity. But, because of the possibility of achieving high performance compared to other communication in the room, this paper has studied the indoor communication performance by applying LoRa in LPWA technologies. After installing the data receiving module on the 4th floor, the transmission module was placed at the end of the building from the same floor to the 1st floor, and the data was collected. As a results, it installed on the 1st floor can be collected data with 98 ~ 99% probability, and the lowest RSSI is about -116dBm. Thus, considering the specification of LoRa with a maximum reception sensitivity -136dBm when the spreading factor is 12, the application of LPWA in the industrial field can be fully considered.

• Journal of the Korean Institute of Gas
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• v.28 no.2
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• pp.32-37
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• 2024

Recently, transportations using hydrogen energy is being researched for the alternative energy of fossil fuels. To use them, processes of producing, storing and transferring are required. When carrying them in liquid under 90 MPa pressure, it costs less than in a gas status. Thus, a hydrogen pump is necessary and in this research we predicted the flow in the chamber using finite element methods (FEM) program ANSYS. As a result, when the valve was opened by 3 mm, between the 1^st chamber and the 2^nd chamber, the maximum velocity was decreased to 8.111 m/s by 10.6% (without valve, 9.075 m/s). In addition, pressure was also increased to 0.63 MPa by 1.6% (without valve, 0.62 MPa). When using these results, more efficient processes would be possible in designing them in detail.