• Journal of Environmental Science International
• /
• v.24 no.11
• /
• pp.1405-1415
• /
• 2015

This study is conducted to determine the damage, distinguish the types and identify the restoration by that type for 13 Korea national parks out of 21. There are 21 Korea national parks are in Korea covering 6.67% of the country or $6,656km^2$ ($3,902km^2$ on land and $2,754km^2$ in the sea) currently since the area around Jirisan ($440km^2$) was designated as the first Korea national parks in 1967. With the cancellation of entrance admission on Korea national parks since 2007, annual visitors to the Korea national parks have grown from 37 millions in 2008 to 46 millions by 2013 and continue to grow due to numerous leisure activities, alpine activities and social changes. As such, Korea national parks are natural resource with high value to be conserved and are attracting significant attention as recreational spaces for people at the same time. On the other hand, there have been issues of soil erosions or disturbed vegetation due to increased number of visitor to the national parks. Korea national parks area damage to its type and damage characteristics to analyse the 13 Korea national parks out of 21 on July 2012 March, Korea national parks over the subjects of the National Park from damaged area status Survey analysis by the Korea National Park Service. As a result, 203 million units in the 16 Korea national parks damaged land of the reform package during ecological trail (including non-regular hiking trails) 153 (77.66%), damaged valleys 20(9.14%) independent damaged area, 13 disconnected ecological axis(7.61%), closed trail(2.03%) (3.55%), and line type damage(like a non-regular hiking trails) appears to be a high ratio. Korea national parks damaged land of the results identified, by contrast ratio and the annual number of visitors Bukhansan national park(49.26%), Gyeongju national park(23.65%) damaged land rates, such as Seorasan national park(4.93%), Songnisan national park (4.43 %), Gyeryongsan national park(3.45%), and the annual number of visitors be similar result. The National Park Service has been reporting on damages and restorations but damages and their types have not been established yet. Damages have been generally studied and categorized on hiking trails due caused by heavy traffic on them but the reports were limited on hiking trails only. Since damage to the Korea national parks are not limited on the hiking trails, it is necessary to determine damages in various aspects. Thus, in this study, damage types, spatial characteristics, causes and restorations are analyzed based on the survey results of damages to national parks in order to provide a basis for the efficient management and operation of the Korea national parks.

• Journal of the Korea Society of Computer and Information
• /
• v.20 no.4
• /
• pp.131-138
• /
• 2015

One of the most conspicuous characteristics of a business model that pursues expanding customer relationship is that it tries to lock in customers by encouraging them to repeat purchase in the long-term with the help of "Follow" function in Social Networking Service (SNS), which enables producers to automatically register the customers as potentially important ones and to offer them customized marketing services. In the value chain of the agriculture sector, producers of agricultural products can use SNS functions to provide loyal customers with valuable information and experiences such as the real-time information of their farm and products, hidden stories about the whole process from seeding to harvesting, and the storage and cooking methods of their products. These activities help the producers invoke customers' desire to live in the farm and to grow the products themselves. They also raise the accessibility of the producers' websites as customers are able to share a variety of news and knowledge such as the release of new products. This means that the producers's websites are now functioning to enable the producers to perform sales and promotion related activities. It is a big leap from the traditional e-commerce business model where sales and promotion of a product were separated and could be connected only through outside links. This two-way, viral characteristics of marketing services using SNS facilitate customers to share product information and their purchase experience with each other, which leads to more effective and efficient communication within the customer community.

• Journal of radiological science and technology
• /
• v.25 no.1
• /
• pp.63-71
• /
• 2002

The aim of this study Is to develop a simple and fast method which computes in-vivo doses from transmission doses measured doting patient treatment using an ionization chamber. Energy fluence and the dose that reach the chamber positioned behind the patient is modified by three factors: patient attenuation, inverse square attenuation. and scattering. We adopted a straightforward empirical approach using a phantom transmission factor (PTF) which accounts for the contribution from all three factors. It was done as follows. First of all, the phantom transmission factor was measured as a simple ratio of the chamber reading measured with and without a homogeneous phantom in the radiation beam according to various field sizes($r_p$), phantom to chamber distance($d_g$) and phantom thickness($T_p$). Secondly, we used the concept of effective field to the cases with inhomogeneous phantom (patients) and irregular fields. The effective field size is calculated by finding the field size that produces the same value of PTF to that for the irregular field and/or inhomogeneous phantom. The hypothesis is that the presence of inhomogeneity and irregular field can be accommodated to a certain extent by altering the field size. Thirdly, the center dose at the prescription depth can be computed using the new TMR($r_{p,eff}$) and Sp($r_{p,eff}$) from the effective field size. After that, when TMR(d, $r_{p,eff}$) and SP($r_{p,eff}$) are acquired. the tumor dose is as follows. $$D_{center}=D_t/PTF(d_g,\;T_p){\times}(\frac{SCD}{SAD})^2{\times}BSF(r_o){\times}S_p(r_{p,eff}){\times}TMR(d,\;r_{p,eff})$$ To make certain the accuracy of this method, we checked the accuracy for the following four cases; in cases of regular or irregular field size, inhomogeneous material included, any errors made and clinical situation. The errors were within 2.3% for regular field size, 3.0% irregular field size, 2.4% when inhomogeneous material was included in the phantom, 3.8% for 6 MV when the error was made purposely, 4.7% for 10 MV and 1.8% for the measurement of a patient in clinic. It is considered that this methode can make the quality control for dose at the time of radiation therapy because it is non-invasive that makes possible to measure the doses whenever a patient is given a therapy as well as eliminates the problem for entrance or exit dose measurement.

• Korean Journal of Veterinary Research
• /
• v.45 no.2
• /
• pp.255-261
• /
• 2005

The purpose of this study is to compare hepatotoxicity of each treatment for dermatophytosis; one is the administration of the ketoconazole only and the other, ketoconazole with diphenyl-dimeththyl-dicarboxylate. Have chosen the range of 14-24 months of healthy dogs divided by two groups (group 1 and group 2) for the experiment of which test proved positive in dermatophytosis diagnosis and showed normal reaction in terms of physical examination, blood chemistry and especially of liver function. Group 1 was administrated ketoconazole orally at 10 mg/kg/day and of same dose of ketoconazole with diphenyl-dimethyl-dicarboxylate for group 2. After administering, we have tested two groups by blood collecting every one week in order to check the differences of hepatotoxicity state through AST, ALT and r-GTP, the barometers of liver function which lasted for 12 weeks. Moreover, tested Indocyanine Green (ICG), known as susceptible gauge of function of excretion before starting the experiment and tested ICG as well after 12 weeks. The experiment of result the value of group 1 in AST, ALT and r-GTP has been highly rised after administering ketoconazole for 10 weeks meanwhile, of group 2 has shown a steady state troughout the whole experiment. For ICG test, we injected 0.5 mg/kg of ICG into a vein for both groups and tested the retention rate at regular interval of 15, 30, 45 minutes. The results of retention rate in two groups were similar to before the drug administration. However, after 12 weeks the retention rate of group 1 has been delayed, on the other hand, retention rate of group 2 were a steady state. In conclusion, the administration of ketoconazole only for a long period of time induced hepatotoxicity where as, the administration of ketoconazole with diphenyl-dimethyl-dicarboxylate didn't induce hepatotoxicity. Therefore, when doctors prescribes for a dog with dermatophytosis should not administrate ketoconnazole itself but with diphenyl-dimethyl-dicarboxylate and one who has abnormal condition of liver function should not be prescribed ketoconazole treatment. If there is a case needed to prescribe ketoconazole treatment, the regular monitoring should be accompanied by at the same time.

• Journal of Technologic Dentistry
• /
• v.34 no.3
• /
• pp.291-302
• /
• 2012

Purpose: It is to survey old men's utilization status of dental clinic and temporary-binding dentures and then to provide basic data to make a program for manufacturing old men's dentures and their teeth health education. Methods: Random selection was made on old men living in Daejeon and Chungnam, and a survey was conducted from April 15 to May 20, 2011. 500 questionnaires were distributed and 420 questionnaires were collected. Using spss 18.0 program, final analysis was made on 363 questionnaires except for 57 questionnaires which had missing value or showed some doubts about the unreliability. Results: 1. With respect to number of natural teeth as per the age, the upper/lower jaws had meaningful differences (P<.001), which means that the older the person is, the smaller number of natural teeth is. In the meantime, there was no meaningful difference according to sex. 2. With respect to kind of prosthetics installed in a mouth as per the age, there was meaningful difference in the upper jaws (P<.05) but there was no meaningful difference in the lower jaws. It was found out that the older the persons are, the more they use removable dentures while the younger the persons are, the more they use fixed partial dentures. 3. With respect to mouth health condition recognized by oneself, it showed bad (44.4%) and good (10.3%),which means recognition as bad is greater, and the age when prosthetics were first used is dispersed variously from below 40 to over 70. 4. Dental care institutions which they mainly used are hospital and clinics (91.5%), and 66.4% of them visited dental clinics lately. Preferential treatment if they go to dentists is as follows in the order of prosthetics (33.9%), gum treatment (24.2%) and pain treatment (14.9%). 5. 68.4% of them revisited dentists after installation of dentures and the reason for revisit is as follows in the order of poorly fitted dentures (35.1%), painful gum 25.9%, regular check-up 25.4% and difficult chewing 9.6%. Conclusion: As our country enters into an aging society, mouth health problem of old men has come to a serious issue, and therefore, a survey was conducted on some old men with respect to their utilization status of dental clinic and removable dentures in order to provide basic data for improvement of quality of their life, maintenance and enhancement of their mouth health. The study result shows that the older they are, the higher the loss rate of teeth as well as needs for prosthetics are, and thus it is thought the study will help to develop mouth health education program which may improve quality of old men's life by recovery of mouth functions declined due to loss of teeth and by regular check-up, education for mouth health control and following-up control of dentures.

• Korean journal of communication and information
• /
• v.62
• /
• pp.223-243
• /
• 2013

Value collision takes place in the news organization at times. The concept of social responsibility has been serving as the raison d'$\hat{e}$tre not just of individual reporters but eventually of journalism in general. But when the organizational interests are at stake, more realistic values contributing to the organization often override the normative values. This phenomenon occurs since there exists a clear discrepancy between the nominally highlighted values and the virtual values of press owner or news organization. Focusing on Chosun Ilbo, this paper tries to identify the values a news organization really underlines and pursues, and explores the nature of organizational culture embedded in these values. In specific, this study analyzes such performances as ceremonies and rituals, regular or occasional, in Chosun Ilbo, since these are cultural practices which produce and circulate particular meanings and values forming the basis of organizational culture. According to this study, 'strong unity' is the core value which the owner family in Chosun Ilbo has ever been spotlighting. As long as the strong unity is stressed, the role playing as members of news organization for its interest is more highly regarded than carrying out the normative missions given unto the journalists in general.

• Archives of design research
• /
• v.18 no.1 s.59
• /
• pp.105-114
• /
• 2005

With the upcoming Digital age, it is time to develop digitalized contents based on cultural basis. in this respect, Kimchi is one of the most primal cultural content signifying Korean culture. It's no doubt the time to initiate the movement to digitalize the contents concerning Kimchi by gathering materials on the origin of Kimchi culturally and a great value to revive digital contents regarding Kimchi. Therefore, in this research, it is regarded that Kimchi is one of the most prominent cultural value that is possible to inherit from generations and should be stratified on the database. A method explaning Korean Kimchi culture is sought in this paper. And It is focused on the culture of Korean Kimchi profoundly and focus on detailed context and varied styles of he digital contents. It is organized on the basis of various aged volumes regarding Kimchi classified by seasons, ingredients, Jonga Kimchi (Kimchi inherited from the oldest family by generations), 24 seasonal divisions of the year, and 8 regional divisions of the nation. It is planned to set up digitally-focused library regarding cultural origin of contents and to present solidity and a feeling of being dynamic The results could be used in a variety of Industries in tourism, education, Kimchi and building basic infrastructure in entertainment industry. It is also applied to specialized industry by providing cultural contents and it could contribute to activation of Kimchi industry with e-Market and portal site regarding Kimchi. Moreover, it may re-establish the cultural value of Kimchi and provide the infrastructure in Kimchi-related industry such as Kimchi cyber museum, Kimchi Expo, Kimchi town by using educational materials in Education industry fields (regular curriculum and experience tour).

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.2
• /
• pp.95-101
• /
• 2017

In this paper, the sizing removal condition for the pretreatment of composite materials is obtained numerically by applying an image processing algorithm and nickel-plated carbon fiber is fabricated by a dry process method to enhance its electromagnetic shielding performance. Sizings that are wrapped in a polymer type material during the manufacturing of carbon fiber should be removed for dry coating. A numerical value, that is the correlation, can be obtained by determining the regular pattern of the carbon fiber in the image taken by a scanning electron microscope (SEM) after the sizing is removed. The application of the proposed numerical method to the SEM image of the fiber after the sizing is removed with solution, compressed air, solution and compressed air (hybrid), showed that this method of eliminating the sizing is superior to the hybrid method. Then, by spreading the carbon fiber roll with the sizing removed, we were able to produce nickel plated carbon fiber by the roll-to-roll sputtering method. The electromagnetic shielding performance of the fabricated 30, 40 and 100 nickel coated carbon fibers was measured. The Korea Advanced Institute of Science and Technology evaluated the electromagnetic shielding performance of the 100 nickel-coated carbon fiber to have a maximum value of 73.2 (dB) and a minimum value of 66.7 (dB). This is similar to the electromagnetic shielding rate of copper and shows that this material can be used as a cable for EV / HEV automobiles.

• The korean journal of orthodontics
• /
• v.37 no.2 s.121
• /
• pp.89-97
• /
• 2007

Objective: The purpose of this study was to measure the insertion torque of orthodontic miniscrews regarding changes in their shape, diameter, and length. Methods: Torque values were measured during continuous insertion of the miniscrews into solid rigid polyurethane foam, using a torque tester of driving motor type with a regular speed of 3 rpm. Orthodontic miniscrews (Biomaterials Korea, Seoul, Korea) of cylindrical type and taper type were used. Results: Increasing the length and diameter of the miniscrews increased the maximum insertion torque value in both cylindrical and taper type screws. Insertion torque was increased at the incomplete head of the cylindrical type screw, and at the tapered part of the taper type screw. The insertion torque value of miniscrews was influenced most by diameter, then shape and length. As a result, it was shown that the diameter of the screw had the most influence on insertion torque, and the taper type screw had a higher torque value than the cylindrical type screw. Conclusion: Therefore, a large diameter or taper type screw are adequate for areas of thin cortical bone with a large interdental space, and a small diameter or cylindrical type screw are adequate in the mandibular molar area or the midpalatal area having thick cortical bone.

• The Korean Journal of Food And Nutrition
• /
• v.29 no.1
• /
• pp.87-103
• /
• 2016

The purpose of this study was to analyze the food-related lifestyle choices of female baby boomers and to investigate variables regarding home meal replacement (HMR) buying behaviors and future needs. This study was conducted on 358 female baby boomers 53 years of age living in Gyeonggi and near Seoul. Out of 420 distributed questionnaires, 358 were returned and used for analysis (response rate: 85.2%). As a result of cluster analysis, three groups were identified based on the food-related lifestyles : a value-seeking group, a convenience-seeking group, and a health-seeking group. Among the three groups, there were significant differences in two socio-demographic characteristics, education level (p<0.05) and regular exercise (p<0.01), and in several health- and food-related habits, type of breakfast (p<0.01), type of dinner (p<0.05), dinner details (p<0.05), frequency of eating out (p<0.05), and eating habits score (p<0.01). The health-seeking group was significantly more likely to purchase ready to cook (RTC) items (59.1%) than were the other groups (p<0.001). However, the ratio of HMR purchasing for the purpose of meal replacement (p<0.05) and an HMR purchasing frequency of more than twice a week (p<0.001) were significantly lower in the health-seeking group. Reasons for selecting HMR showed a similar tendency among groups in taste (26.2%), convenience (18.7%), price (16.9%), safety (15.3%) and type of food (14.3%). However, the satisfaction scores for hygiene and safety reported by the health-seeking group were significantly lower than those reported by the other groups. More than two-thirds of all respondents were willing to purchase HMR in the future, though there were significant differences according to group: convenience-seeking group, 73.1%, health-seeking group, 70.1%, and value-seeking group, 65.7% (p<0.05). Our results suggest that the number of baby boomers purchasing HMR products will continue to grow and baby boomers will want HMR products to be more healthy (52.0%), safe (28.5%) and delicious (13.4%). An emphasis on taste was high in the convenience-seeking group, whereas an emphasis on health was high in the health-seeking and value-seeking groups. In conclusion, this study shows various food-related lifestyles amongst female baby boomers and illustrates the need to develop HMR marketing strategies targeted to these different lifestyles.