• The korean journal of orthodontics
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• v.52 no.4
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• pp.268-277
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• 2022

Objective: Poor experience with Invisalign treatment affects patient compliance and, thus, treatment outcome. Knowing the potential discomfort level in advance can help orthodontists better prepare the patient to overcome the difficult stage. This study aimed to construct artificial neural networks (ANNs) to predict patient experience in the early stages of Invisalign treatment. Methods: In total, 196 patients were enrolled. Data collection included questionnaires on pain, anxiety, and quality of life (QoL). A four-layer fully connected multilayer perception with three backpropagations was constructed to predict patient experience of the treatment. The input data comprised 17 clinical features. The partial derivative method was used to calculate the relative contributions of each input in the ANNs. Results: The predictive success rates for pain, anxiety, and QoL were 87.7%, 93.4%, and 92.4%, respectively. ANNs for predicting pain, anxiety, and QoL yielded areas under the curve of 0.963, 0.992, and 0.982, respectively. The number of teeth with lingual attachments was the most important factor affecting the outcome of negative experience, followed by the number of lingual buttons and upper incisors with attachments. Conclusions: The constructed ANNs in this preliminary study show good accuracy in predicting patient experience (i.e., pain, anxiety, and QoL) of Invisalign treatment. Artificial intelligence system developed for predicting patient comfort has potential for clinical application to enhance patient compliance.

• Journal of The Korea Institute of Healthcare Architecture
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• v.29 no.1
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• pp.43-51
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• 2023

Purpose: To accommodate the increasing number of patients during the COVID-19 pandemic, numerous portable HEPA filter units (PHUs) were installed in the general wards of existing medical facilities(EMFs) to convert them into emergency conversion facilities (ECFs). The purpose of this study was to build a dataset in preparation for emerging infectious diseases in the post-COVID-19 era by analyzing the construction and operation of ECFs. Methods: Field investigations were conducted during ECF operation periods based on the analysis of heating, ventilation, and air conditioning (HAVC) system design documents for six ECFs across Korea. Interviews were conducted with facility managers during the field investigations. Results: When constructing an ECF within an EMF, the installation status and characteristics of the existing system should be considered. Field investigations and verifications of the operation of HAVC systems must be conducted beforehand for smooth ECF operations. If heating and cooling are required with indoor air circulation type equipment in an ECF zone, the implementation of a heating and cooling method that can satisfy the comfort requirements of the occupants while minimizing cross-contamination is essential. When using PHUs that do not meet the performance standards required by medical equipment, the noise level resulting from such equipment operation must be evaluated and improved. Implications: For EMFs, various guidelines that can be referred to for the construction and operation of ECFs must be developed to prepare for emerging infectious diseases in the future.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.49 no.1
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• pp.30-42
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• 2023

Objectives: While the reliability of immediate implant placement in the maxillary molar has been discussed, its significance is questionable. There have been no guidelines for case selection and surgical technique for successful treatment outcomes of immediate maxillary molar implants. Therefore, in this study, we classified alveolar bone height and socket morphology of the maxillary molar to establish guidelines for immediate implant placement. Materials and Methods: From 2011 to 2019, we retrospectively analyzed 106 patients with 148 immediate implants at the Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital. Inclusion and exclusion criteria were applied, and patient characteristics and treatment results were evaluated clinically and radiologically. Results: A total of 29 tapered, sand-blasted, large-grit, and acid-etched (SLA) surfaces of implants were placed in 26 patients. The mean patient age was 64.88 years. Two implants failed and were reinstalled, resulting in a 93.10% survival rate. Fluctuating marginal bone level changes indicating bone regeneration and bone loss were observed in the first year following installation and remained stable after one year of prosthesis loading, with an average bone loss of 0.01±0.01 mm on the distal side and 0.03±0.03 mm on the mesial side. Conclusion: This clinical study demonstrated the significance of immediate implant placement in maxillary molars as a reliable treatment with a high survival rate using tapered SLA implants. With an accurate approach to immediate implantation, surgical intervention and treatment time can be reduced, resulting in patient satisfaction and comfort.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.49 no.6
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• pp.347-353
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• 2023

This case report presents inferior alveolar nerve (IAN) repositioning as a viable approach for implant placement in the mandibular molar region, where challenges of severe alveolar bone width and height deficiencies can exist. Two patients requiring implant placement in the right mandibular molar region underwent nerve transposition and lateralization. In both cases, inadequate alveolar bone height above the IAN precluded the use of short implants. The first patient exhibited an overall low alveolar ridge from the anterior to posterior regions, with a complex relationship with adjacent implant bone level and the mental nerve, complicating vertical augmentation. In the second case, although vertical bone resorption was not severe, the high positioning of the IAN within the alveolar bone due to orthognathic surgery raised concerns regarding adequate height of the implant prosthesis. Therefore, instead of onlay bone grafting, nerve transposition and lateralization were employed for implant placement. In both cases, the follow-up results demonstrated successful osseointegration of all implants and complete recovery of postoperative numbness in the lower lip and mentum area. IAN repositioning is a valuable surgical technique that allows implant placement in severely compromised posterior mandibular regions, promoting patient comfort and successful implant placement without permanent IAN damage.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.3
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• pp.79-86
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• 2013

Departments of family medicine at some general hospitals find it difficult to hold regular conferences because they have a small number of faculty members. The recent technological development of videoconferencing has made it possible for these small departments to regularly participate in the conferences held by departments with a larger number of faculty members. The objective of this study was to show the level of satisfaction with and acceptance of our videoconferencing system. One presenting site and four receiving sites participated in the videoconferences, which were held every Monday for three weeks. There were no significant differences in the levels of satisfaction with the videoconferences between faculty at the presenting site and faculty at the receiving sites. In contrast, residents at the receiving sites rated most items related to satisfaction with the videoconferences lower than residents at the presenting site. There were no changes between the pre-test and post-test scores of residents both at the presenting site and at the receiving sites. Despite its limitations, the advantages of joint-videoconferencing among several departments of family medicine were comfort level, time-saving, increasing the number of participants, promoting discussion, and provoking thought.

• Journal of Korean Public Health Nursing
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• v.15 no.1
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• pp.157-171
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• 2001

The study was designed to provide the fundamental information for understanding discomfort of bone marrow donors and for promoting an individual comfort by comparing the difference on discomfort between unrelated donors and related donors. The subject of the study was fifty related donors and thirty unrelated donors who was in the C University Hospital. This survey had been carried out and collected from October, 1998 to March, 1999. The scale of discomfort of donors associated with bone marrow donation were assessed by the questionnaire deviced by Kim Sang Dol and amended by the researcher. Data was analyzed by $x^2-test$, t-test, two-way ANOVA, and Pearson Correlation Coefficients. The results were as follows. 1. Considering the general characteristics of bone marrow donors according to gender, male was consisted of $60\%$ and female was consisted of $40\%$. Of those related donors are consisted for $62.5\%$ and accounted for $37.5\%$ of those unrelated donors. Considering the classification to the job, employee of company were major donors which was $35\%$, and next order was student, individual businessman, and housewife. Considering the education level. college students were $48.7\%$ and students who have less than high school level were $42.5\%$. 2. According to the above the results regarding discomfort of bone marrow donation, it is especially shown that the major cause for discomfort of bone marrow donors is on physical factor. The concrete examples for physical factor are pain in the region of bone marrow harvest and pain in the injection part by fluid therapy and blood-sampling, an immovability of the body after bone marrow harvest, and difficulties on walking. Considering physiological factor, there are an uneasiness about leading to injure their health, vague fear about the hospital. and a tedium at hospital. Environmental factors for discomfort of bone marrow donors are insufficient explanation for needle gauge and procedure of bone marrow donation and difficulty on following medical schedule. Therefore. it is necessary to establish more effective and systematically organized program for nursing intervention based on the research results. An effective program is only useful in getting rid of discomfort of bone marrow donors.

• Korean Journal of Health Education and Promotion
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• v.7 no.2
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• pp.89-102
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• 1990

The research is a comparative study of death attitudes between male and female elderly people. There is no doubt as to the inevitability of death. And yet, there is a vast conspiracy involved in the word of dead or death. The aged are considered to be nearer death than are people in other age groups. Kalish(1976) emphasized that for the aged two meanings of death have significance for evaluating their life ; first, that older people are known to have a limited life time and face death ; second that older people are known to have suffered many death-imposed losses that are often associated with the dying process. In considering these implications, the level of anxiety regarding death and dying is a crucial factor in determining mental health. In the study, 152 male elderly and 145 female elderly residing in Seoul, Korea was compared on the four dimensions of death anxiety and assigned personal variables. Therefore, the purpose the research was (1) to examine the characteristics of subjects on the independent variables(age, marital status, family relationship, social activities, religiousity etc.) ; (2) to examine the relationship between the independent variables and each dimension of death axniety ; (3) to determine the proportion of variance in the respective of death anxiety which is accounted for by the respective independent variables ; (4) to examine whether a significant difference between the respective independent variables and each dimension of death anxiety has ; (5) to determine the combination of variables which is the most successful in explaining the variance in death anxiety. Finding from this study support the following conclusions; 1. There was a significant differences between the male and female subjects in the level of death anxiety. In turn, the male older adults had lower death anxiety than did the female elderly. This implies that male tend to look forward to death rather than deny it. 2. As there was evidences from several studies, this research found that fear of death decreases as age increases. 3. The following two variables that correlate best with dying anxiety of others in both male and female older adults : 'marriage life', 'social interaction'. 4. The variables 'age' and 'children' for both female and male elderly accounted for the most variance in death anxiety of self. The findings of the study lend this investigator several suggestions, implications and recommendations for future research. There can be no death without life, and conversely, no life without death. Psychologists and health-related professionals may be learn as much about death as they can in order to develop more healthy attitudes and in order to be able to better aid and comfort dying people and their familities. Perhaps most importantly, professionals may be help those who are not faced with death at present to develop an understanding of it and healthy attitudes toward it. The programs of death education are needed for dedication to the evitability of death and the preparation of life for the older adults. More seminars, symposiums and research on death attitudes are needed. Finally, study for female older adults has been negelected topic in the areas of women's study and health education. Future study, for female elderly, have to deeply investigate where those problems come from and how to cope with in order to the female elderly segment can live the rest of their lives in satisfaction with well-being.

• Korean Journal of Human Ecology
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• v.18 no.1
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• pp.157-166
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• 2009

This study was conducted to evaluate the differences in external appearances and functional qualities between the slacks which were patterned on existing designs and on a new design in order to improve on their level of comfort of ready-made clothes for abdominally fat women. Five abdominally fat women in their 60's were chosen as experimental participants. Twenty-four external evaluation items, and seven different actions involving six moving parts of the body were investigated with a 5-level scale in the repeated wearing test. The results were analyzed by statistical methods. The newly designed pattern in this study was definitely superior to the other two patterns(L-type and K-type) on the external appearance evaluation. The newly pattern removed a waist belt and a dart from the front part of the garment and gave surplus space around the waist. It prevented superfluous wrinkles at the abdominal region and thighs. The superfluous wrinkles at the side regions also disappeared due to the length (inseam) reduction from waist to crotch. The newly pattern made the center-line of the back side slightly sloped to the main pattern in order to remove the drooped line. The newly pattern showed the highest score in the functional test of several actions. It was due to the reduction of the length from waist to crotch as well as the belt width. It made waist-line movement better, and made it easier and more comfortable to sit down. The newly pattern also showed the highest score in the functional test classified by specific movements of parts of the body for the same purpose. The slacks which were made of elastic materials showed better results than the non-elastic ones on external appearances and functional test items. It showed that the elastic materials played a better role in the increase of functional action of abdominally fat, aged women. This study suggests that the newly designed slacks pattern could give abdominally fat, aged women better external features and a more comfortable fitting sensation. As well, the results were significant as basic data to produce ready-made and/or tailer-made garments.

• Journal of Home Health Care Nursing
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• v.8 no.2
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• pp.121-134
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• 2001

The purpose of this study were to analyze the home care services and to evaluate the client's satisfaction with the home care services provided by home care service center in the C hospital. The data were collected by reviewing charts of 128 home care clients who were receiving home care services at C hospital from October 1997 to September 2000. The subjects for satisfaction of home care service were 20 clients from July 10 to September 30, 2000. The tool for measurement of present condition of home care service was developed by the researchers. The satisfactions of the home care services were measured by using the instrument developed by Im(997). The data were analyzed by using the SPSS/PC+. The results of this study were as followings : 1. Majority of the subjects was female(61.7%). The average of age was 63.5 years. The service has been used mostly by the elderly 60 years of age or older(71.1%). The economic level of most of subjects was in middle class(94.5%). 2. Majority of the subject had a cancer(55.4%), following stroke(25.0%). The average duration of disease for the subjects was 31 months. The average time of hospitalization for the subjects was 3.3 times. The duration of hospitalization was 10$\sim$30 days(26.6%), 30$\sim$60 days(23.4%) and above of the 210 days(9.4%). 3. Most of the subjects used his/her doctor (47.7%), as a consultant, following his/her nurse (28.1%), other patients or their family (21.9%). Most of reasons for a consultation were supportive management(Infusion or medication, 60.94%), following tube management(L-tube or T-tube, 25%), Foley catheter management (15.63%) etc. 4. 28 types of nursing diagnoses were used by the home care service. The nursing diagnosis altered nutrition: less than body requirement were used mostly by the home care service, following risk for infection, impaired skin integrity, impaired swallowing, ineffective airway clearance altered comfort: pain, impaired physical mobility. By the human-response pattern, exchanging(63.2%), moving(7.5%), feeling(10.4%), knowing(5.2%), communicating (2.6%), relating(0.5%) perceiving(0.4%) and choosing(0.3%). There were 42 nursing intervention types were performed by the home care service. By the NIC(nursing intervention classification. McCloskey. Bulech. 1996). physiologic: complex (30.3%) was the most, safety(28.3%), behavioral(20.0%), physiologic: basic(10.8%) and health system(1.7%). Observation or assessment was the most nursing intervention performed by the home care service. following IV infusion. vital sign observation. infusion management and fluid-electrolyte balance management. 5. The level of client's satisfaction with provided home care services showed considerably high(2.67/ 3).

• Journal of the Earthquake Engineering Society of Korea
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• v.11 no.2 s.54
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• pp.57-68
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• 2007

The mega frame system is becoming popular for the design and construction of skyscrapers because this system exhibits structural efficiency by allowing high rigidity of the structure while minimizing the amount of structural materials to be used. Since the mega frame system is usually adopted for super high-rise buildings, the comfort of occupants may be main concerns in the practical application of this system. For the enhancement of the serviceability of mega frame structures, a semi-active tuned mass damper (STMD) is developed in this study. To this end, a Magnetorheological (MR) damper is employed replacing passive damper as a semi-active damper to improve the control effect of a conventional TMD. Since a conventional finite element model of mega frame structures has significant numbers of DOFs, numerical simulation for investigation of control performances of a STMD is impossible by using the full-order model. Therefore, a reduced-order system using minimal DOFs, which can accurately represent the dynamic behavior of a mega frame structure, is proposed in this study through the matrix condensation technique To improve the efficiency of the matrix condensation technique, multi-level matrix condensation technique is proposed using the structural characteristics of mega frame structures. The efficiency and accuracy of the reduced-order control proposed in this study and the control performance of a STMD were verified using example structures.