• Journal of the Korean School Mathematics Society
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• v.21 no.4
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• pp.419-443
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• 2018

The purpose of this study was to analyze the problem solving strategies of ordinary students, gifted students, pre-service teachers, and in-service teachers with the 'chicken and pig problem,' which has multiple strategies to obtain the solution. For this study, 98 students in the 6th grade elementary schools, 96 gifted students in a gifted institution, 72 pre-service teachers, and 60 in-service teachers were selected. The researcher presented the "chicken and pig" problem and requested them the solution strategies as many as possible for 30 minutes in a free atmosphere. As a result of the study, the gifted students used relatively various and efficient strategies compared to the ordinary students, and there was a difference in the most used strategies among the groups. In addition, the percentage of respondents who suggested four or more strategies was 1% for the ordinary students, 54% for the gifted students, 42% for the pre-service teachers, and 43% for the in-service teachers. As suggestions, the researcher asserted that various kinds of high-quality mathematical problems and solving experiences should be provided to students and teachers and have students develop multi-strategy problems. As a follow-up study, the researcher suggested that multi-strategy mathematical problems should be applied to classroom teaching in a collaborative learning environment and reflected them in teacher training program.

• The Korean Journal of Pesticide Science
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• v.15 no.1
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• pp.15-21
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• 2011

Monitoring or follow-up surveying pesticide residues in agricultural commodities is the key to meet the international regulations and to enhance international competitiveness of Korean agricultural commodities. Six neonicotinoid insecticides, acctamiprid, clothianidin, dinotefuran, imidacloprid, thiacloprid, and thiamethoxam were monitored in 95 paprika samples collected from Gyeongnam area. Thc pesticide residues were extracted by EN 15662 buffer based on the QuEChERS method, clean-upped with dispersive solid-phase extraction method to remove interfering pigments, and analyzed using UPLC-MS/MS. The neonicotinoid pesticides were detected in 90.5% of the paprika samples. Two or more pesticides were detected in 82.3% of samples. Although detection frequencies were high, all samples complied with the maximum residue limits (MRLs) set by both the Korea Food and Drug Administration (KFDA) and Japanese Ministry of Health, Labour and Welfare.

• Archives of Plastic Surgery
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• v.45 no.2
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• pp.128-134
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• 2018

Background Non-syndromic craniosynostosis causes craniofacial asymmetry and may persist after cranioplasty. These postoperative asymmetries are primarily depressions. In some cases, patients may be subjected to pranks and harassment by their peers, affecting their psychosocial development. We propose lipoinjection enriched with adipose stem cells (ASCs) to treat the sequelae of craniosynostosis in the fronto-orbital and temporal complex in cranioplasty patients, with the goal of improving the appearance of the upper third of the face. Methods Twelve children (four boys and eight girls) between 4 and 8 years of age (mean age, 6 years) in the postoperative period after treatment for plagiocephaly, brachycephaly, and trigonocephaly were included, with a follow-up period of 1 to 18 months. Fat tissue was obtained from the lower abdomen, and ASCs were isolated using the Yoshimura technique. Lipoinjection was performed using several mini-approaches to ensure adequate distribution. Results Two different scales were used to evaluate the aesthetic outcomes. At 6 months, three plastic surgeons independent of the study classified the results using a Likert scale. The patients' parents categorized the results using a visual analog scale at 6, 9, and 18 months. R esults were favorable on both scales, as the patients' facial appearance improved and they reported increased happiness and self-esteem due to their remodeled facial appearance. Conclusions We suggest that lipoinjection enriched with ASCs is a good alternative for correcting asymmetry of the fronto-orbital and temporal contour in patients with sequelae of craniosynostosis. This treatment will help boost patients' self-esteem starting at an early age.

• The Journal of Korean Academy of Prosthodontics
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• v.56 no.4
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• pp.347-353
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• 2018

Gradual attrition is a normal process of aging, but severe attrition causes occlusal disharmony, functional disorder and esthetic problems. The collapse of posterior support may cause attrition of anterior teeth, and loss of occlusal vertical dimension (OVD). And it induces the pathologic change of the TMJ, unaesthetic facial appearance and decreased masticatory function. In this case, 70 year-old male presented with decreased vertical dimension and esthetic problems due to worn dentition. Based on assessment of intraoral findings, diagnostic cast and radiographic examination, full-mouth rehabilitation with increase of OVD was planned. After 10 month follow-up, occlusal stability is maintained and through this procedure, satisfactory outcomes were achieved in esthetic and functional aspects.

• The Korean Journal of Emergency Medical Services
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• v.24 no.1
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• pp.57-66
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• 2020

Purpose: The purpose of this study was to test the effect of simulation-based learning on knowledge, confidence, and critical thinking of paramedical students enrolled in the Korean Advanced Life Support (KALS) program. This study used a one group, pre-post test design. Methods: The subjects of this study were 79 paramedical students in D city. Data were collected before and after the simulation-based training using a structured questionnaire. The data were analyzed using SPSS version 22.0. Results: After the simulation-based KALS education, knowledge (t=-6.88, p<.001) and confidence (t=-10.12, p<.001) increased among paramedical students. There was a positive correlation between confidence and critical thinking disposition (r=0.37, p=.001). Conclusion: A practical module for simulation-based education that can improve knowledge, confidence, and critical thinking disposition related to professional resuscitation is needed for use with paramedical students. Additionally, follow-up studies should be conducted to verify the educational effects of such a program.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.28 no.2
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• pp.64-73
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• 2019

Various techniques have been developed, and the development of piezo electric devices have made it possible to widen the alveolar ridge even if the residual bone is dense or if there is a lack of cancellous bone between the cortical bones. In the operation of the mandibular posterior area, the flap is easily accessible to the ramus bone, from which high quality autogenous bone can be obtained, compared to other parts. A small autologous bone block can be used with particulated bone graft material using one screw for bone regeneration instead of a large autologous bone with two screws. The tapered implant design can minimize buccal bone fracture, even in severely atrophic mandibular areas. We report a case of 4 years following implant placement with ridge splitting and small autogenous bone graft in severly atrophic mandible. This report demonstrates a case of functional and aesthetic restoration in a patient through a collaboration.

• Journal of the Korea Convergence Society
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• v.10 no.2
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• pp.195-200
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• 2019

The purpose of this study is to investigate the phenomenon of user's use of services, focusing on Skyscanner apps, and to suggest improvements to provide better user experience. The service described in this paper is complicated in booking ticket and deficient its usability at a certain age. As a result, three point of improvement is derived. Provide clear information and countermeasures. And make operating procedure be convenient to learn. It is significant that this study suggested ways to improve ticket reservation services through Skyscanner, a major online ticket reservation service. In the follow-up study, I expected that this study will help the various business models improve its system such as UI design, improvement of information structure, and Skyscanner for silver generation.

• Journal of Digital Convergence
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• v.17 no.5
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• pp.347-351
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• 2019

The purpose of this study is to suggest the Assessment model for tourist information center in Seoul. As a research method, we analyzed international guideline and interview with tourism experts in order to rate the tourist centers in Seoul. Secondly, we renamed the international rating model to Itaewon information center as a typical landmark in Seoul. The assessment factors for T.I.C is assembled through researching of the centers' status in terms of overall service satisfaction. Via in - depth interview with 9 visitors, as a result, we were able to derive the possibility that new-designed rating model is able to be applied to the Tourist centers in Seoul. It is significant that this study suggests ways to improve domestic tourist center service. It is expected that the follow - up study will help improve the factors to Seoul T.I.C, not only Itaewon, with much more specific rating method.

• Journal of Digital Convergence
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• v.18 no.12
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• pp.497-505
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• 2020

As social interest in emotional labor grows, there are many related studies in progress in recent times. However most of the studies are focused on preventing harmful effects of emotional labor or seeking effective follow-up measures from the service provider's point of view. For this reason, with focusing on the bank teller service which is one of most representative face-to-face emotional labor, this study was progressed to suggest improvement measures by identifying and analyzing the current status of visual installations at the work space for awareness improvement of emotional labor from the customer's point of view. To this end, after a prior study, an field survey of 10 banks in the first financial sector was conducted to draw out problems and finally propose improvement directions with four aspects in link with the problems presented. This study is expected to have meaning in terms of securing diversity in emotional labor related research.

• Clinics in Shoulder and Elbow
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• v.24 no.1
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• pp.4-8
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• 2021

Background: As nonsteroidal anti-inflammatory drugs (NSAIDs) and steroids have similar effects, steroids can be avoided to reduce adverse effects. This study aimed to compare the differences in symptom improvement after subacromial injection of steroids or NSAIDs. Methods: Sixty patients with rotator cuff syndrome for at least 3 months were enrolled and divided into steroid and NSAID groups. The steroid group received a mixture of 1 mL of triamcinolone acetonide (40 mg/mL) and 1 mL of lidocaine hydrochloride 2%, while the NSAID group received a mixture of 1 mL of Ketorolac Tromethamine (30 mg/mL) and 1 mL of lidocaine hydrochloride 2%. The patients were assessed before and at 3, 6, and 12 weeks after the procedure. Shoulder scores from visual analog scale (VAS), American Shoulder and Elbow Surgeons (ASES), and University of California Los Angeles (UCLA) were used for evaluation. Results: Both groups showed improvements in the clinical outcomes. Overall VAS, ASES, and UCLA scores improved from 6.9, 32.7, and 16.0 before the procedure to 2.0, 1.2, and 1.1; 81.5, 87.6, and 88.5; and 29.7, 31.8, and 32.0 at weeks 3, 6, and 12 weeks after the procedure, respectively. Twenty-six patients (86.7%) in the steroid group and 28 (93.3%) in the NSAID group reported satisfactory treatment outcomes. There were no significant differences in the outcomes between the two groups (p=0.671). Conclusions: Subacromial injection of NSAIDs for rotator cuff tendinitis with shoulder pain had equivalent outcomes with those of steroid injection at the 12-week follow-up.