• Mass Spectrometry Letters
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• v.15 no.1
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• pp.26-39
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• 2024

Gold nanostructures (Au NSs) are useful and interesting matrices for mass spectrometric analysis of various biomolecules based on organic matrix-free laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS). Au NSs provide high efficiency and versatility in LDI-TOF-MS analysis based on their well-established synthesis and surface functionalization, large surface area, high laser absorption capacity, and photothermal conversion efficiency. Therefore, Au NSs based LDI-TOF-MS can be a facile, functional, and efficient analytical method for important small biomolecules owing to its simple preparation, rapid analysis, salt-tolerance, signal reproducibility, and quantitative analysis. This review chronologically summarizes the important advance of Au NSs-based LDI-TOF-MS platforms in terms of in-depth mechanism, signal enhancement, quantitative analysis, and disease diagnosis.

• Korean Journal of Community Nutrition
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• v.13 no.1
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• pp.34-45
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• 2008

For the correct dietary habit and balanced dietary intake of aged people, the nutrition management that fits to the dietary behavior change stage has to be accomplished. In order to do so, in this paper, we chose 175 women that are aged more than 65 years old who are rural long life community residents and surveyed the dietary intake for 2 days including a twice depth interview and the 24 hour recall method. Also, for the sake of our aim, using the transtheoretical model, the dietary behavior change stage group was divided into the contemplation stage group, the preparation stage group, the action stage group and the maintenance stage group. The results are as follows: In the intake amount of protein (p < 0.01), vitamin $B_1$ (p < 0.05) and vitamin $B_6$ (p < 0.05), the intake amount of these nutrients in the action stage group and the maintenance stage group were significantly larger than the intake amount in the contemplation stage group and the preparation stage group. The nutrition evaluation according to the dietary behavior change stage, the ratio of subjects who took insufficient amount of energy, protein, vitamin A, and vitamin C were low as the dietary behavior change stage was upgraded. The subjects of maintenance stage group were most likely to consume vegetables more than once a day, and consume fruits and milk and milk products more than 5 times/week. MAR [13], MAR [10] and MAR [4] of subjects in the action stage group and the maintenance stage group were significantly higher than MAR [13], MAR [10] and MAR [4] of subjects in the contemplation stage group and the preparation stage group (p < 0.001). From the above results, there were differences of nutrient intakes according to the dietary behavior change stage. Therefore, it is considered that the intervention for the dietary behavior motivation induction has to be advanced before accomplishing the individually fitting intervention at the time of nutrient management intervention.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.695-709
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• 2022

This study examined the mothers' stress level as it related to meal preparation and a change in food consumption during the Covid-19 pandemic. I asked mothers about the difficulties related to meal preparation, changes in food consumption, and their interest in food and health information using in-depth research methods. As a result, food delivery and online food consumption have markedly expanded as eating out has decreased. Mothers tried to serve fresh food at home because they perceived delivery food as unhealthy. They stick to it more vigorously with their younger children. As the result of analysis on determinants of food consumption, their interest in organic food is higher when mothers' ages are younger with higher income. However, mothers with a low level of education tend to be uninterested in it. Therefore, the ages of the children and mothers, household income, and education levels all had an effect on food consumption behaviors.

• 한국노년학
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• v.31 no.3
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• pp.711-732
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• 2011

The purpose of this study is to understand the meaning and essence of aged life, which Korean elderly experience in real life and restructure them in the context of time and culture. In order to do so an in-depth interview was done with 15 elderlies over the age of 60 living in Hwaseong City, an urban-rural composite area in Gyeonggi Province where diverse elderlies could be found. In result, first, Korean elderly's understanding of aged life had physical, familial, economical, leisure, and social restoration aspects. Second, it was found that the degree of understanding about preparation for aging and preparedness is quite low. Third, as the gap between actual preparation for aging and aged life that elderly dreamed of became wider 'resentment on children', 'denial of reality', 'physical and economical change', and 'experience from prolongation of life-cycle' was found. Based on such results following suggestions could be made. First, the awareness of aged life and preparation for aging should be strengthened and there is a need for diverse educations aiming successful aged life. Second, elderly welfare policy and practical intervention with an integrated perspective based on the realm of life-cycle are demanded. Third, there is a need to strengthen the Aged Income Maintenance System for existing elder generation. Fourth, an intervention about adaptation and coping means of life event is needed. Lastly, there is a need to expand and carry out the aged life planning program for future elder generation.

• Journal of the Society of Disaster Information
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• v.8 no.3
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• pp.276-286
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• 2012

The purposes of this study are to investigate various experience factors of the court security team's occupational socialization process and suggest basic materials which are necessary to establish educational service strategies of preliminary court security and guard. Therefore, in-depth interview and ethnographic study were conducted for 4 court securities whose career is more than 3 years. As the result, the process of occupational socialization process of the court security was divided into preparation period, adaptation period, conflict period and maturity period. In the preparation period, vision of university departments, acquisition of certificates and information of the court security team are the factors of basic stage for becoming court securities. In the adaptation period, they adapt themselves for playing their own roles sincerely and become professional manpower after being court securities, through the university educational program useful for practical duties, certificates for practical duties and occupational satisfaction. In the conflict period, they aware conflicts of the company and job stress, that court securities should experience, and endure them. In the maturity period, they are grown by one more step as court securities, through the motivation, job professionalism, occupational prospect and efforts of self-development.

• The Journal of Korean Academy of Prosthodontics
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• v.41 no.3
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• pp.319-324
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• 2003

Statement of problem. Adhesives in dentistry playa major role in the success of restorative treatments. In the treatment of all ceramic restoration it is needed to find the adequate bond strength between enamel and dentin. Purpose. The purpose of this study was to evaluate shear bond strength of resin cement bonded to extracted human uncut enamel, cut enamel, and dentin in vitro. Material and methods. Ten freshly extracted anterior teeth without any previous restorative treatments were chosen. The extracted teeth were embedded in PMMA cold acrylic in the shape of a cylinder, 25 mm in diameter by 25 mm in height. The bonding system used was as follow: Uni-Etch (32% phosphoric acid), One-Step adhesive, Duolink resin cement. The specimens were acid etched and rinsed with water. Two layers of One-Step adhesive were coated with a disposable brush on the uncut enamel. VIP curing light at $500mV/cm^2$ was used to cure the adhesive. For cut enamel shear bond test, the specimen used for uncut enamel was further reduced approximately $0.3{\sim}0.5mm$ using a laminate preparation diamond bur (0.3 mm in depth). The specimens were subsequently treated with 320-grit SiC paper followed by 600-grit SiC paper and cleaned with distilled water. The bonding procedure on the cut enamel was same as uncut enamel bonding procedure. For dentin bonding test, the specimen used for cut enamel was further reduced approximately $0.5mm{\sim}1.0mm$ using a laminate preparation diamond bur (0.5 mm in depth of diamond cutting). The amount of reduction was evaluated with the silicone mold. The specimens were subsequently treated with 320-grit SiC paper followed by 600-grit silicon carbon paper and cleaned in distilled water. The bonding procedure on the dentin was same as uncut enamel bonding procedure. All samples were mounted and secured on the Ultradent shear bond test sample holder, and Ultradent restricted shear bond testing device was used with Universal Instron machine until fracture. Analysis of variance (ANOVA) test was performed comparing the result at P<0.05. Multiple comparison (Tukey) was used to compare each groups. Result. The result showed that the mean value in shear bond strength of resin cement bonded to uncut enamel, cut enamel and dentin were 27.04 Mpa, 30.25 Mpa and 26.39 Mpa with respect. Conclusion. Within the limitation of this study, the mean value of the shear bond strength of cut enamel was higher than those of uncut enamel or dentin. However there existed no statistical differences between three different human dentition substrates due to increased adhesive characteristics.

• Korean Security Journal
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• no.42
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• pp.87-113
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• 2015

This research study aims to analyze the process, you may encounter in the process of re-socialization through desocialization cause and the preparation of a study on private security agents desocialization and re-socialization of private security guards. In order to achieve the objectives of this study served as a private security agents who ride a moderator after desocialization to conduct in-depth interviews aimed at seven subjects experienced a re-evaluation of the socialization another chapter of the study, data analysis and content analysis coming from d derived through the following results: First, private security agents became the de-socialization due to various factors, different for each individual. In other words, the vision for the low-paid and insecure jobs, and excessive work environment and poor welfare was the main cause. Second, the preparation period of private security agents were called desocialization appropriate time before and after 40 business nature. That is, when considering the physical changes and their ability to work Mangan expenses that require expertise that can be interpreted in the context affordable. Third, private security agents were experiencing anxiety and duryeomum for the new job, rather than sinking feeling regret after retirement, showed that receive help for families and the surrounding communities to adapt and re-socialization through communication with people. There were also shown the safety and satisfaction of the new job and re-socialization experience to adapt to society looking for a new job.

• Restorative Dentistry and Endodontics
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• v.23 no.1
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• pp.54-67
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• 1998

The purposes of this study were to evaluate the efficiency of dentin cutting and root-end cavity preparation, and to determine the incidence of tooth crack when root-end retrograde cavity preparation was done with. ultrasonic diamond instruments. To evaluate the efficiency of dentin cutting, ultrasonic diamond and stainless steel instruments were applied to 20 exposed bovine dentin surfaces perpendicularly or parallely at the low, and medium power settings for 1 minute ($Miniendo^{TM}$, EIE, CA, U.S.A.). The resultant cavity depth was measured. To evaluate the efficiency of cavity preparation and to investigate the incidence of tooth crack, 165 mesiobuccal, distobuccal and palatal root-ends of extracted human maxillary first molars were resected by 3 mm perpendicularly to the long axis of tooth using a slow speed diamond saw after root canal preparation and filling. Retrocavities were prepared using a ultrasonic diamond instrument or a stainless steel one of the low- or medium power settings of 2 or 6. Time consumed and the number of strokes used for the cavity preparation were measured and the incidence of tooth cracks was evaluated under a stereomicroscope. The results were as follows: Both at the low and medium power settings, and both with perpendicularly- and parallely applied tips to dentin, diamond instruments showed higher dentin cutting efficiency than stainless steel ones did (p<0.01). When tips were applied to dentin perpendicularly, both diamond instrument and stainless steel one showed higher cutting efficiency with medium power setting than with low power one (p<0.01). Both at the low- and medium power settings, both diamond instrument and stainless steel one showed higher cutting efficiency when tips were applied perpendicularly to dentin surface than applied parallely (p<0.01). At the medium power setting, the number of stroke and time consumed were less with diamond instrument than with stainless steel one (p<0.05) for the retrograde cavity preparation. At the low power setting, diamond instrument induced less tooth cracks than stainless steel one did (p<0.01).

• Journal of the Korean Society of Costume
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• v.65 no.3
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• pp.131-150
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• 2015

This article studied the procedures and items used in royal princess weddings by examining "Garyedeungrok(嘉禮謄錄)" which describes Princess Hwasun(和順翁主, 1720-1758)'s wedding in 1732. This was the first wedding by a princess during King Yeongjo(英祖)'s reign. Preparation for the wedding was made based on the previous weddings of royal princesses, but it did not follow the old tradition. The wedding costs were cut down, and it was done in a simpler way than before. However, the simplification of elaborate wedding outfits were not part of this change as ceremonial robes such as No-ui(露衣), Jangsam(長衫) and Chopo(綃袍) were used without much alteration. The wedding ceremony of Princess Hwasun shows the transition process from the royal princess wedding ceremony traditions and rituals in the late 17th century to "Gukhonjeongrye", which emerged and became solidified as a new social norm in the 18th century. A legitimate royal princess and a de facto princess from King's concubine were hardly different when it came to their royal outfitting but the disparity in social status between the two was found in the materials used to make clothes for their respective husbands. Princess Hwasun's wedding procedure shown in "Garyedeungrok" is similar to that of "Gukjo-orye-ui(國朝五禮儀)": Napchae(納采), Nappye(納幣), Chinyeong(親迎), Dongroe(同牢), Hyeongugo(見舅姑), Hyeonsadang(見祠堂), and Seojohyeon(壻朝見). But "Garyedeungrok" deals with the procedures of Gantaek(揀擇), Buma-guanrye(駙馬冠禮), and Seonon(宣醞), which are not included in "Gukjo-orye-ui", and also with the process of preparation for wedding items and the information of related people. However, it is hard to learn about its specific shapes and features because it is often restricted to lists such as a list of clothing. Collecting new materials and an in-depth and succeeding study are required in the future.

• Journal of Families and Better Life
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• v.32 no.1
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• pp.133-150
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• 2014

This study is aimed at examining the employment preparation of Chinese migrant women and exploring measures to support their employment in a practical manner. To accomplish the objectives, in-depth interviews with 15 Han Chinese and Korean Chinese women, who represent the highest proportion in Korea, were conducted. Each interview lasted for about an hour and a half on average, and there were additional questionnaires and observations on vocational courses. Collected data was analyzed in 4 steps by utilizing the analysis methods suggested by Lichtman (the three C's of data analysis: codes, categories, concepts), which were transformed to fit the final data. The research findings are as follows. First, the fundamental reasons that Chinese migrant women seek employment in Korea are as follows: role model as a mother based on motherhood and the desire to be recognized as a member of society. Second, as for employment strategies, although all the respondents were only dependent on the referral of their acquaintances and national institutions, Han Chinese and Korean Chinese women had ambivalent attitudes toward each other. Third, they attributed the causes of unemployment to personal aspects such as the amount of effort made and luck, and social structural aspects, including employment instability and low acceptance of multi- cultural individuals. Fourth, the migrant women hoping for 'complete integration' in the future, suggested some practical employment support measures. Such measures should be established by comprehensively reflecting their reasons for getting a job, employment strategies, attributions of unemployment, and employment outlook, rather than as response measures to the low birth rate and aging issues in Korea.